Medicine feeding system and method for in-situ calibration and adjustment of medicine feeding amount
阅读说明：本技术 一种就地校准调整加药量的加药系统及其方法 (Medicine feeding system and method for in-situ calibration and adjustment of medicine feeding amount ) 是由 李金朴 于 2019-11-29 设计创作，主要内容包括：本发明公开了一种就地校准调整加药量的加药系统,包括滴注罐、引压口、气体连通管、液位计、出药三通、流量计、调节阀、标定开关阀、出药管；所述滴注罐顶部设置引压口；所述滴注罐底部与出药管一端连接相通；所述出药管上设置标定开关阀,所述出药管另一端与出药三通侧面接口连接相通；所述出药三通上部接口与液位计底部接口连接相通；所述液位计顶部接口与气体连通管一端连接相通,所述气体连通管另一端与滴注罐顶部连接相通；所述出药三通下部接口与流量计进口连接相通；所述流量计出口与调节阀连接相通。本发明能够有效解决加药系统的加药流量计量、调整、控制、偏流难题,能够节省加药量；具有实施容易,安全可靠,应用广泛,推广容易等优特点。(The invention discloses a medicine feeding system for in-situ calibration and adjustment of medicine feeding amount, which comprises a drip tank, a pressure guide port, a gas communicating pipe, a liquid level meter, a medicine outlet tee joint, a flow meter, an adjusting valve, a calibration switch valve and a medicine outlet pipe, wherein the pressure guide port is arranged on the drip tank; the top of the drip tank is provided with a pressure guide port; the bottom of the drip irrigation tank is communicated with one end of the medicine outlet pipe; a calibration switch valve is arranged on the medicine outlet pipe, and the other end of the medicine outlet pipe is communicated with a side interface of the medicine outlet tee; the upper port of the medicine outlet tee is communicated with the bottom port of the liquid level meter; the top interface of the liquid level meter is communicated with one end of a gas communicating pipe, and the other end of the gas communicating pipe is communicated with the top of the drip tank; the lower port of the medicine outlet tee is communicated with the inlet of the flowmeter; and the outlet of the flowmeter is communicated with the regulating valve. The invention can effectively solve the problems of dosing flow metering, adjustment, control and bias flow of the dosing system and can save the dosing amount; the method has the advantages of easy implementation, safety, reliability, wide application, easy popularization and the like.)
1. A medicine feeding system for in-situ calibration and adjustment of medicine feeding amount is characterized in that: comprises a drip tank, a pressure leading port, a gas communicating pipe, a liquid level meter, a medicine outlet tee joint, a flow meter, an adjusting valve, a calibration switch valve and a medicine outlet pipe;
the top of the drip tank is provided with a pressure guide port;
the bottom of the drip irrigation tank is communicated with one end of the medicine outlet pipe;
a calibration switch valve is arranged on the medicine outlet pipe, and the other end of the medicine outlet pipe is communicated with a side interface of the medicine outlet tee;
the upper port of the medicine outlet tee is communicated with the bottom port of the liquid level meter;
the top interface of the liquid level meter is communicated with one end of a gas communicating pipe, and the other end of the gas communicating pipe is communicated with the top of the drip tank;
the lower port of the medicine outlet tee is communicated with the inlet of the flowmeter;
the outlet of the flowmeter is communicated with the regulating valve;
the elevation of the top of the liquid level meter is equal to or higher than the elevation of the top of the drip irrigation tank, and the elevation of the bottom of the liquid level meter is equal to or lower than the elevation of the bottom of the drip irrigation tank.
2. The system of claim 1, wherein the system further comprises: the lower port of the medicine outlet tee is communicated with the regulating valve; the regulating valve is communicated with the inlet of the flowmeter.
3. A medicine adding system for in-situ calibration and adjustment of medicine adding amount comprises a drip tank, a pressure guide port, a gas communicating pipe, a liquid level meter, a connecting pipe fitting, a flowmeter, an adjusting valve, a calibration switch valve and a medicine outlet pipe;
the side surface of the lower part of the drip tank is communicated with one end of the medicine outlet pipe;
the other end of the medicine outlet pipe is communicated with a side interface at the lower part of the liquid level meter;
the side interface at the upper part of the liquid level meter is communicated with one end of a gas communicating pipe, and the other end of the gas communicating pipe is communicated with the side surface at the upper part of the drip tank;
the bottom interface of the liquid level meter is communicated with one end of the connecting pipe fitting;
the other end of the connecting pipe fitting is communicated with an inlet of the flowmeter;
the elevation of the top of the liquid level meter is equal to or higher than the elevation of the top of the drip irrigation tank, and the elevation of the bottom of the liquid level meter is equal to or lower than the elevation of the bottom of the drip irrigation tank.
4. A system for calibrating and adjusting the amount of a drug to be administered in situ according to claim 3, wherein: the lower port of the medicine outlet tee is communicated with the regulating valve; the regulating valve is communicated with the inlet of the flowmeter.
5. The system of claim 1, wherein the system further comprises: the side surface of the lower part of the drip tank is communicated with one end of the medicine outlet pipe; the other end of the gas communicating pipe is communicated with the side surface of the upper part of the drip tank; the elevation of the top of the liquid level meter is lower than that of the top of the drip irrigation tank, and the elevation of the bottom of the liquid level meter is higher than that of the bottom of the drip irrigation tank.
6. The system of claim 4, wherein the system further comprises: the lower port of the medicine outlet tee is communicated with the regulating valve; the regulating valve is communicated with the inlet of the flowmeter.
7. The system of claim 4, wherein the system further comprises: the bottom of the drip irrigation tank is communicated with one end of the medicine outlet pipe.
8. The system of claim 6, wherein the system further comprises: the lower port of the medicine outlet tee is communicated with a regulating valve, and the regulating valve is communicated with the inlet of the flowmeter.
9. A medicine adding system for in-situ calibration and adjustment of medicine adding amount comprises a drip tank, a pressure guide port, a gas communicating pipe, a liquid level meter, a connecting pipe fitting, a flow meter, an adjusting valve, a calibration switch valve, a medicine outlet pipe, a medicine supplementing port, a standby port, a vent port, a safety valve and a pressure gauge;
the pressure leading port is provided with a flange;
the top of the drip tank is provided with a vent, a safety valve and a pressure gauge;
the vent with the flange is communicated with the top of the drip tank, the safety valve is communicated with the drip tank, and the pressure gauge is communicated with the top of the drip tank;
the bottom of the drip irrigation tank is communicated with one end of a medicine outlet pipe, and the other end of the medicine outlet pipe is communicated with a side interface at the lower part of the liquid level meter;
the bottom interface of the liquid level meter is communicated with the connecting pipe fitting;
the connecting pipe fitting is communicated with an inlet of the flowmeter;
the inlet of the flowmeter is communicated with the regulating valve;
the other end of the gas communicating pipe is communicated with the top of the drip tank;
the medicine supplementing port is communicated with the bottom of the drip irrigation tank, and the standby port is communicated with the bottom of the drip irrigation tank;
the elevation of the top of the liquid level meter is equal to or higher than the elevation of the top of the drip irrigation tank, and the elevation of the bottom of the liquid level meter is equal to or lower than the elevation of the bottom of the drip irrigation tank.
10. The system of claim 9, wherein the system further comprises: the connecting pipe fitting is communicated with the regulating valve; the regulating valve is communicated with the inlet of the flowmeter.
11. The system of any of claims 1-4, 6, 8-9, wherein: the flowmeter is any one of a gear flowmeter, a rotor flowmeter, an ultrasonic flowmeter, an external clamp type ultrasonic flowmeter, a portable ultrasonic flowmeter, an electromagnetic flowmeter, a float flowmeter, a water meter, an amoebic flowmeter, a bent pipe flowmeter, a balance flowmeter, a wedge flowmeter, a target flowmeter, a vortex flowmeter, a turbine flowmeter, a pore plate flowmeter, a vortex flowmeter and a differential pressure flowmeter.
12. The system of any of claims 1, 3, 5, and 9, wherein: the liquid level meter is any one of a magnetic turning plate liquid level meter, a magnetic floater type liquid level meter, a magnetic sensitive electronic double-color liquid level meter, a glass tube liquid level meter, a glass plate type liquid level meter, a color quartz tube type liquid level meter, a sight glass type liquid level meter and an ultrasonic liquid level meter.
13. The system of any of claims 1, 3, 5, and 9, wherein: the liquid level meter is a remote transmission type magnetic floater type liquid level meter which is manufactured by utilizing a buoyancy principle, a magnetic coupling effect, a sensor, a transmitter and a display instrument.
14. The system of any of claims 1, 3, 5, and 9, wherein: the liquid level meter comprises a shell with a flange, a magnetic floating ball liquid level transmitter with a flange, an upper interface and a bottom interface; the lower end of the magnetic floating ball liquid level transmitter extends to the lower part in the shell, and the upper end of the magnetic floating ball liquid level transmitter is connected with a flange at the top of the shell; the magnetic floating ball liquid level transmitter can convert the liquid level into a standard electric signal and transmit the standard electric signal remotely.
15. The system of any of claims 1, 3, 5, and 9, wherein: the liquid level meter comprises a threaded shell, a threaded static pressure type liquid level transmitter, an upper interface and a bottom interface, wherein the lower end of the static pressure type liquid level transmitter extends to the lower part in the shell, and the upper part of the static pressure type liquid level transmitter is in threaded connection with the top of the shell; the static pressure type liquid level transmitter is a magnetostrictive liquid level transmitter; the static pressure type liquid level transmitter can convert the liquid level into a standard electric signal and transmit the signal remotely.
16. The system of any of claims 1, 3, 5, and 9, wherein: the liquid level meter comprises a shell, a pressure transmitter, an upper interface and a bottom interface, wherein the pressure transmitter is arranged at the lower part of the shell; the pressure transmitter can convert the liquid level into a standard electric signal and transmit the standard electric signal remotely.
17. The system of any of claims 1, 3, 5, and 9, wherein: the liquid level meter comprises a shell, a pressure gauge, a top connector and a bottom connector, wherein the pressure gauge is arranged at the lower part of the shell; the pressure gauge is a precision pressure gauge with 0.1-level precision.
18. The system of any of claims 1, 3, 5, and 9, wherein: the liquid level meter comprises a shell, a magnetic float, a top interface, colored iron powder and a bottom interface, wherein the magnetic float is arranged in the shell, and the colored iron powder is arranged outside the shell and at a position corresponding to the magnetic float.
19. The system of any of claims 1, 3, 5, and 9, wherein: the drip tank is a closed container or/and a pressure container.
20. A method of in situ calibration of dosing according to the dosing system of claims 1, 3, 9, comprising the steps of:
1) erecting a drip tank:
placing the drip tank on the bracket, so that the elevation of the bottom of the drip tank is higher than the elevation of the top of the natural gas pipeline;
the bracket is made of any one of a metal material and a non-metal material;
2) connecting and balancing pressure:
on the upper part or the top of the natural gas pipeline, a pressure guiding pipe is used for connecting and communicating a pressure guiding port with the natural gas pipeline, so that the pressure in the drip tank and the liquid level meter is automatically balanced with the pressure in the natural gas pipeline;
the upper part or the top of the natural gas pipeline is communicated with the regulating valve and the natural gas pipeline by a pesticide conveying pipe;
3) balancing liquid level:
opening a calibration switch valve to automatically balance liquid levels in the drip tank and the liquid level meter;
4) drip the medicament in the level gauge:
closing the calibration switch valve, opening the regulating valve, and allowing the medicament in the liquid level meter to sequentially pass through the medicament outlet tee joint, the flowmeter, the regulating valve and the medicament conveying pipe under the action of gravity and enter the natural gas pipeline;
5) timing read data
Timing by using a stopwatch, and reading the liquid level scale value of the liquid level meter when the timing is started and ended; simultaneously reading instantaneous flow values of the flowmeter at the beginning and the end of timing;
6) calculating the mean value
Calculating the medicine discharging volume of the liquid level meter within the timing time according to the liquid level scale value of the liquid level meter at the beginning and the end of timing and the known inner diameter of the liquid level meter, and further calculating the medicine discharging flow of the liquid level meter within unit time; calculating the average instantaneous flow of the flowmeter within the timing time according to the instantaneous flow values of the flowmeter at the beginning and the end of timing;
7) calculating in-situ calibrated metering error of a flowmeter
Calculating the local calibration metering error of the flowmeter according to a formula of 'the local calibration metering error of the flowmeter ═ the medicine flow rate of the liquid level meter in the step 6) ÷ the average instantaneous flow rate of the flowmeter in the step 6) ÷ the medicine flow rate of the liquid level meter in the step 6) × 100%';
8) adjusting and calibrating the medicine-adding flow
Opening the calibration switch valve, automatically balancing the liquid level in the drip tank and the liquid level meter, and allowing the medicament in the drip tank to sequentially pass through the medicament outlet pipe, the calibration switch valve, the medicament outlet tee joint, the flowmeter, the regulating valve and the medicament conveying pipe under the action of gravity to enter the natural gas pipeline;
adjusting the opening of the regulating valve, calibrating according to the in-situ calibration metering error in the step 7), correcting the instantaneous flow reading of the flowmeter, and adjusting the dosing flow to the required dosing flow.
21. The method of in-situ calibration adjustment of dosing amount for a dosing system of claim 20, wherein: in step 2): the natural gas pipeline is vertically connected and communicated with the upper part or the top part of the natural gas pipeline by a valve, and then a pressure guiding pipe is used for connecting and communicating a pressure guiding opening and the valve; opening the valve to automatically balance the pressure in the drip tank and the liquid level meter with the pressure in the natural gas pipeline;
the valve is vertically connected and communicated with the upper part or the top of the natural gas pipeline, and then the regulating valve is connected and communicated with the valve 901 by the medicine conveying pipe; and opening the valve to connect and communicate the regulating valve with the natural gas pipeline.
22. A method of in situ calibration of dosing according to the dosing system of claims 1, 3, 9, comprising the steps of:
1) erecting a drip tank:
placing the drip tank on the bracket, so that the elevation of the bottom of the drip tank is higher than the elevation of the central line of the sleeve valve;
the bracket is made of any one of a metal material and a non-metal material;
2) connecting and balancing pressure:
connecting and communicating a junction pipe with one closed end with a sleeve valve;
connecting and communicating the pressure guiding port with the top of the junction pipe by using a pressure guiding pipe, and opening a sleeve valve to automatically balance the pressure in the drip tank and the liquid level meter with the pressure in the sleeve;
the regulating valve is communicated with the top of the junction pipe by a medicine conveying pipe;
3) balancing liquid level:
opening a calibration switch valve to automatically balance liquid levels in the drip tank and the liquid level meter;
4) drip the medicament in the level gauge:
closing the calibration switch valve, opening the regulating valve, and allowing the medicament in the liquid level meter to sequentially pass through the medicament outlet tee joint, the flow meter, the regulating valve, the medicament conveying pipe, the junction pipe and the sleeve valve under the action of gravity to enter the sleeve;
5) timing read data
Timing by using a stopwatch, and reading the liquid level scale value of the liquid level meter when the timing is started and ended; simultaneously reading instantaneous flow values of the flowmeter at the beginning and the end of timing;
6) calculating the mean value
Calculating the medicine discharging volume of the liquid level meter within the timing time according to the liquid level scale value of the liquid level meter at the beginning and the end of timing and the known inner diameter of the liquid level meter, and further calculating the medicine discharging flow of the liquid level meter within unit time; calculating the average instantaneous flow of the flowmeter within the timing time according to the instantaneous flow values of the flowmeter at the beginning and the end of timing;
7) calculating in-situ calibrated metering error of a flowmeter
Calculating the local calibration metering error of the flowmeter according to a formula of 'the local calibration metering error of the flowmeter ═ the medicine flow rate of the liquid level meter in the step 6) ÷ the average instantaneous flow rate of the flowmeter 305 in the step 6) ÷ the medicine flow rate of the liquid level meter in the step 6) × 100%';
8) adjusting and calibrating the medicine-adding flow
Opening the calibration switch valve, automatically balancing the liquid level in the drip tank and the liquid level meter, and simultaneously enabling the medicament in the drip tank to sequentially pass through the medicament outlet pipe, the calibration switch valve, the medicament outlet tee joint, the flow meter, the regulating valve, the medicament conveying pipe, the junction pipe and the sleeve valve to enter the sleeve under the action of gravity;
adjusting the opening of the regulating valve, calibrating according to the in-situ calibration metering error in the step 7), correcting the instantaneous flow reading of the flowmeter, and adjusting the dosing flow to the required dosing flow.
23. The method of in situ calibration of a dosing system according to claim 22, wherein: in step 2): the top of the collecting pipe is connected and communicated with the top of the collecting pipe through threads by a valve, and then a pressure guiding pipe is used for connecting and communicating a pressure guiding opening with the valve; opening the valve and the sleeve valve to automatically balance the pressure in the drip tank and the liquid level meter with the pressure in the sleeve;
the top of the junction pipe is connected and communicated with the top of the junction pipe through a valve by screw threads, and then the regulating valve is connected and communicated with the valve through a medicine conveying pipe; and opening the valve to connect and communicate the regulating valve with the sleeve.
24. A method of in situ calibration of dosing according to the dosing system of claims 1, 3, 9, comprising the steps of:
1) erecting a drip tank:
placing the drip tank on the bracket, so that the elevation of the bottom of the drip tank is higher than the elevation of the central line of the sleeve valve;
the bracket is made of any one of a metal material and a non-metal material;
2) connecting and balancing pressure:
the pressure guiding pipe is used for connecting and communicating the pressure guiding port with the oil pipe valve through threads, and the oil pipe valve is opened, so that the pressure in the drip tank and the liquid level meter is automatically balanced with the pressure in the oil pipe;
the regulating valve is communicated with the ground pipeline by a medicine conveying pipe through threaded connection; opening an outlet valve of the oil pipe to connect and communicate the regulating valve with the ground pipeline and the oil pipe;
3) balancing liquid level:
opening a calibration switch valve to automatically balance liquid levels in the drip tank and the liquid level meter;
4) drip the medicament in the level gauge:
closing the calibration switch valve, opening the regulating valve, and allowing the medicament in the liquid level meter to sequentially pass through the medicament outlet tee joint, the flowmeter, the regulating valve and the medicament conveying pipe under the action of gravity and enter a ground pipeline;
5) timing read data
Timing by using a stopwatch, and reading the liquid level scale value of the liquid level meter when the timing is started and ended; simultaneously reading instantaneous flow values of the flowmeter at the beginning and the end of timing;
6) calculating the mean value
Calculating the medicine discharging volume of the liquid level meter within the timing time according to the liquid level scale value of the liquid level meter at the beginning and the end of timing and the known inner diameter of the liquid level meter, and further calculating the medicine discharging flow of the liquid level meter within unit time; calculating the average instantaneous flow of the flowmeter within the timing time according to the instantaneous flow values of the flowmeter at the beginning and the end of timing;
7) calculating in-situ calibrated metering error of a flowmeter
Calculating the local calibration metering error of the flowmeter according to a formula of 'the local calibration metering error of the flowmeter ═ the medicine flow rate of the liquid level meter in the step 6) ÷ the average instantaneous flow rate of the flowmeter in the step 6) ÷ the medicine flow rate of the liquid level meter in the step 6) × 100%';
8) adjusting and calibrating the medicine-adding flow
Opening the calibration switch valve, automatically balancing the liquid level in the drip tank and the liquid level meter, and allowing the medicament in the drip tank to sequentially pass through the medicament outlet pipe, the calibration switch valve, the medicament outlet tee joint, the flow meter, the regulating valve and the medicament conveying pipe under the action of gravity to enter the ground pipeline;
adjusting the opening of the regulating valve, calibrating according to the in-situ calibration metering error in the step 7), correcting the instantaneous flow reading of the flowmeter, and adjusting the dosing flow to the required dosing flow.
25. The method of in-situ calibration adjustment of dosing amount for a dosing system of claim 24, wherein: in step 2): firstly, connecting and communicating the valve with an oil pipe valve by using a valve, and then connecting and communicating a pressure guiding port with the valve by using a pressure guiding pipe; opening the valve and the oil pipe valve to automatically balance the pressure in the drip tank and the liquid level meter with the pressure in the oil pipe;
firstly, connecting and communicating with a ground pipeline by using a valve, and then connecting and communicating an adjusting valve with the valve by using a medicine conveying pipe; and opening the valve and the outlet valve of the oil pipe to connect and communicate the regulating valve with the ground pipeline and the oil pipe.
26. A method of in situ calibration of dosing according to the dosing system of claims 1, 3, 9, comprising the steps of:
1) erecting a drip tank:
placing the drip tank on the bracket, so that the elevation of the bottom of the drip tank is higher than the elevation of the central line of the sleeve valve;
the bracket is made of any one of a metal material and a non-metal material;
2) connecting and balancing pressure:
the pressure guiding pipe is used for connecting and communicating the pressure guiding port with the sleeve valve through threads, and the sleeve valve is opened, so that the pressure in the drip tank and the liquid level meter is automatically balanced with the pressure in the sleeve;
the regulating valve is communicated with the ground pipeline by a medicine conveying pipe through threaded connection; opening an outlet valve of the oil pipe to connect and communicate the regulating valve with the ground pipeline and the oil pipe;
3) balancing liquid level:
opening a calibration switch valve to automatically balance liquid levels in the drip tank and the liquid level meter;
4) drip the medicament in the level gauge:
closing the calibration switch valve, opening the regulating valve, and allowing the medicament in the liquid level meter to sequentially pass through the medicament outlet tee joint, the flowmeter, the regulating valve and the medicament conveying pipe to enter a ground pipeline under the action of the sleeve pressure;
5) timing read data
Timing by using a stopwatch, and reading the liquid level scale value of the liquid level meter when the timing is started and ended; simultaneously reading instantaneous flow values of the flowmeter at the beginning and the end of timing;
6) calculating the mean value
Calculating the medicine discharging volume of the liquid level meter within the timing time according to the liquid level scale value of the liquid level meter at the beginning and the end of timing and the known inner diameter of the liquid level meter, and further calculating the medicine discharging flow of the liquid level meter within unit time; calculating the average instantaneous flow of the flowmeter within the timing time according to the instantaneous flow values of the flowmeter at the beginning and the end of timing;
7) calculating in-situ calibrated metering error of a flowmeter
Calculating the local calibration metering error of the flowmeter according to a formula of 'the local calibration metering error of the flowmeter ═ the medicine flow rate of the liquid level meter in the step 6) ÷ the average instantaneous flow rate of the flowmeter in the step 6) ÷ the medicine flow rate of the liquid level meter in the step 6) × 100%';
8) adjusting and calibrating the medicine-adding flow
Opening the calibration switch valve, automatically balancing the liquid level in the drip tank and the liquid level meter, and simultaneously enabling the medicament in the drip tank to sequentially enter a ground pipeline through the medicament outlet pipe, the calibration switch valve, the medicament outlet tee joint, the flowmeter, the regulating valve and the medicament conveying pipe under the action of the pressure of the casing pipe;
adjusting the opening of the regulating valve, calibrating according to the in-situ calibration metering error in the step 7), correcting the instantaneous flow reading of the flowmeter, and adjusting the dosing flow to the required dosing flow.
27. The method of in situ calibration of a dosing system according to claim 26, wherein: in step 2): firstly, connecting and communicating a valve with a sleeve valve, and then connecting and communicating a pressure guiding opening with the valve by using a pressure guiding pipe; opening the valve and the sleeve valve to automatically balance the pressure in the drip tank and the liquid level meter with the pressure in the sleeve;
firstly, connecting and communicating with a ground pipeline by using a valve, and then connecting and communicating an adjusting valve with the ground pipeline by using a thread by using a medicine conveying pipe; and opening the valve and the outlet valve of the oil pipe to connect and communicate the regulating valve with the ground pipeline and the oil pipe.
28. A method of in situ calibration of dosing according to the dosing system of claims 1, 3, 9, comprising the steps of:
1) erecting a drip tank:
placing the drip tank on the bracket, so that the elevation of the bottom of the drip tank is higher than the elevation of the central line of the sleeve valve;
the bracket is made of any one of a metal material and a non-metal material;
2) connecting and balancing pressure:
connecting and communicating the junction pipe with one closed end with an oil well casing valve through pipe threads;
the pressure guiding port is communicated with the top of the junction pipe by a pressure guiding pipe through thread connection, and an oil well casing valve is opened to ensure that the pressure in the drip tank and the liquid level meter is automatically balanced with the pressure in the oil well casing;
the regulating valve is communicated with the junction pipe through a medicine conveying pipe by screw connection;
3) balancing liquid level:
opening a calibration switch valve to automatically balance liquid levels in the drip tank and the liquid level meter;
4) drip the medicament in the level gauge:
closing the calibration switch valve, opening the regulating valve, and allowing the medicament in the liquid level meter to enter the oil well casing through the medicament outlet tee joint, the flow meter, the regulating valve, the medicament conveying pipe, the junction pipe and the oil well casing valve in sequence under the action of gravity;
5) timing read data
Timing by using a stopwatch, and reading the liquid level scale value of the liquid level meter when the timing is started and ended; simultaneously reading instantaneous flow values of the flowmeter at the beginning and the end of timing;
6) calculating the mean value
Calculating the medicine discharging volume of the liquid level meter within the timing time according to the liquid level scale value of the liquid level meter at the beginning and the end of timing and the known inner diameter of the liquid level meter, and further calculating the medicine discharging flow of the liquid level meter within unit time; calculating the average instantaneous flow of the flowmeter within the timing time according to the instantaneous flow values of the flowmeter at the beginning and the end of timing;
7) calculating in-situ calibrated metering error of a flowmeter
Calculating the local calibration metering error of the flowmeter according to a formula of 'the local calibration metering error of the flowmeter ═ the medicine flow rate of the liquid level meter in the step 6) ÷ the average instantaneous flow rate of the flowmeter in the step 6) ÷ the medicine flow rate of the liquid level meter in the step 6) × 100%';
8) adjusting and calibrating the medicine-adding flow
Opening a calibration switch valve, automatically balancing the liquid level in the drip tank and the liquid level meter, and simultaneously enabling the medicament in the drip tank to sequentially pass through a medicament outlet pipe, the calibration switch valve, a medicament outlet tee joint, a flowmeter, an adjusting valve, a medicament conveying pipe, a junction pipe and an oil well casing valve under the action of gravity to enter an oil well casing;
adjusting the opening of the regulating valve, calibrating according to the in-situ calibration metering error in the step 7), correcting the instantaneous flow reading of the flowmeter, and adjusting the dosing flow to the required dosing flow.
29. The method of in situ calibration of a dosing system according to claim 28, wherein: in step 2): firstly, a valve is communicated with the top or the upper part of the junction pipe, and then a pressure guiding pipe is used for communicating a pressure guiding opening with the valve; opening the valve and the oil well casing valve to make the pressure in the drip tank and the liquid level meter automatically balance with the pressure in the oil well casing;
the valve is connected and communicated with the junction pipe firstly, and then the regulating valve is connected and communicated with the valve by the medicine conveying pipe; and opening the valve to connect and communicate the regulating valve with the oil well casing.
Technical Field
The invention relates to the field of oil and gas field dosing, in particular to a dosing system and a dosing method for adjusting dosing amount in a calibration mode. Can be applied to oil and gas wells and oil and gas pipelines which need to be added with medicaments.
Background
In order to ensure normal production and operation of oil and gas channels (collectively referred to as oil and gas flow channels) of oil and gas wells, oil and gas pipelines, pipe fittings and instruments and the like, a functional chemical agent (also referred to as a medicament) which is in a liquid state at normal temperature and normal pressure is usually added into the oil and gas flow channels, and the chemical agent is generally referred to as dosing.
When adding medicine, generally, the medicine adding amount (i.e. the medicine adding amount) or the medicine adding flow (i.e. the medicine adding flow) of the medicine needs to be controlled, adjusted and measured.
At present, the dosage or the dosage flow of the medicament is mainly controlled, adjusted and metered by using a metering pump in China, and the method has the following defects:
1. the method can not accurately control, adjust and measure the dosing flow, and only can roughly control, adjust and measure the dosing flow.
As is known in the art: the metering pump controls the stroke length of a plunger by utilizing a cam mechanism so as to control the percentage of rated displacement (or theoretical displacement) of the metering pump, thereby achieving the purpose of controlling the displacement of the metering pump; if the rated displacement of the metering pump is 60 liters/hour, the displacement of the metering pump can be adjusted to 50 percent of the rated displacement by controlling the plunger stroke of the metering pump to be 50 percent of the maximum stroke by utilizing the cam mechanism, so that the displacement of the metering pump is adjusted to 30 liters/hour; because the metering pump does not have a flowmeter, the plunger of the metering pump has leakage, and the leakage is larger and larger along with the continuous abrasion of the sealing function of the plunger and the continuous abrasion of the liquid discharge valve and the liquid inlet valve, so that the dosing flow cannot be accurately controlled, adjusted and metered by the metering pump.
2. The method can not effectively control, adjust and measure the dosing flow of the 1-pump multi-tube dosing system, can not solve the problem of the dosing flow bias of the 1-pump multi-tube dosing system, and can not meet the dosing flow control, adjustment and measurement requirements of the dosing systems.
Take Qinghai gas field as an example.
The gas field is applied with a high-pressure gas lift production process, 2-50 high-pressure natural gas injection pipelines are generally arranged on 1 gas distribution valve bank, and 10MPa high-pressure natural gas is respectively distributed into 2-50 gas well casings for gas lift production.
Taking 1 gas distribution valve group with 2 high-pressure natural gas injection pipelines arranged in the gas field as an example, as shown in fig. 1, the process can be briefly described as follows: the gas distribution valve group is provided with a
At present, the liquid flow is generally measured by using a flow meter measuring method in China, for example, a gear flow meter is used for measuring instantaneous water flow and accumulated water flow in a water pipe; the method is used for the dosing amount or dosing flow metering of the medicament, and has the following defects:
1. the gear flowmeter has leakage; when the dosing flow is small and the viscosity of the medicament is low, the metering error caused by leakage amount can reach 57 percent, which is hundreds of times of the factory calibration metering error of the gear flowmeter, so that the dosing flow is difficult to be effectively metered, and the actual production requirement cannot be met.
As is known in the art: the viscosity difference of different medicaments is great, for example, the viscosity of ethylene glycol used as a natural gas hydrate inhibitor is several times that of clear water, the viscosity of polyacrylamide aqueous solution and polyvinylpyrrolidone aqueous solution used as the natural gas hydrate inhibitor is several hundred times that of the clear water, but the viscosity of methanol used as the natural gas hydrate inhibitor is lower than that of the clear water; the lower the viscosity of the medicament, the larger the leakage of the gear flowmeter, and the larger the metering error.
As is known in the art: the gear flowmeter is generally calibrated for the metering error by using the calibration device and the clean water shown in fig. 2 when being shipped.
The test shows that: the calibration device and methanol shown in fig. 2 are used for a gear flowmeter calibration test, and the results show that: when the reading of a pressure gauge 202 (with the accuracy of 1.6 grade) is 0.03MPa, the
As is known in the art: the national standard requires that the maximum error of the industrial instrument is 4%, and when the existing industrial flowmeter leaves a factory or is calibrated in an authoritative metering mechanism, the maximum allowable value of the metering error is +/-4%; the user uses the industrial flow meter, and the maximum allowable value of the indoor calibrated metering error is plus or minus 4 percent; the chemical adding flow of oil and gas wells and oil and gas pipelines is generally very small, for example, a gas distribution valve group with 2 gas injection pipelines is arranged in a Qinghai gas field, the total methanol adding amount of the 2 gas injection pipelines is 30-60 liters/day (or 1.25-2.5 liters/hour), and the average methanol adding amount of a single gas injection pipeline is only 15-30 liters/day (or 0.625-1.25 liters/hour); therefore, when the error of the flow meter reaches 57%, the real and effective dosing amount (or dosing flow) cannot be obtained according to the flow meter, and the production requirements of oil and gas wells and oil and gas pipelines cannot be met.
2. The leakage of the gear flowmeter belongs to mechanical clearance leakage, and the leakage quantity of the gear flowmeter is necessarily changed along with the change of the pressure difference before and after the flowmeter; due to the complexity, the fluctuation and the contingency of the fluid in the actual production working condition, the front and back pressure difference of the gear flowmeter in the actual production application is different and changes randomly at any time, so the actual leakage quantity is also different and changes randomly at any time; therefore, the metering error of the gear flowmeter calibrated before delivery or under other indoor conditions is greatly different from the metering error of the gear flowmeter in actual production application, so that the dosing flow is difficult to accurately meter, and the actual production requirement cannot be met.
The general knowledge in the field and the fluid mechanics are that: when the geometrical size of the gap is constant, the flow rate of the fluid passing through the gap is changed along with the change of the pressure difference between the front and the back of the gap; the flow resistance of the fluid passing through the small hole with the aperture of 1mm and the large hole with the aperture of 10mm is different; when a fluid passes through a small hole with a diameter of 1mm and a large hole with a diameter of 10mm at the same time, if the flow rate of the fluid passing through the large hole with a diameter of 10mm is changed, the flow rate passing through the small hole with a diameter of 1mm is necessarily changed; therefore, even if the pressure difference between the front and the rear of the gear flowmeter is constant, the leakage of the gear flowmeter is different when the instantaneous flow is 10 liters/hour and 1 liter/hour; that is, even if the differential pressure across the same gear flowmeter is constant, the gear flowmeter will have different leakage amounts when measuring different instantaneous flow rates.
In short, the above-mentioned method for controlling, adjusting and measuring the dosage (or the dosage flow) cannot effectively measure, control and adjust the dosage and the dosage flow when the dosage is small.
Disclosure of Invention
The "agent" in the present invention: also called functional chemical agent, sometimes called medicine for short, is liquid at normal temperature and pressure.
The invention comprises the following steps: is a general term for adding functional chemical agents. Sometimes it refers to the process of adding liquid chemical agent into oil and gas well and oil and gas pipeline.
The dosage in the invention is as follows: refers to the volume or weight of functional chemical added, and sometimes to the dosing flow rate.
The 'dosing flow rate' in the invention: sometimes, the dosage is abbreviated, which is the abbreviation of the adding flow of the functional chemical agent, and generally refers to the volume flow of the functional chemical agent.
The first technical problem to be solved by the invention is to provide a dosing system for calibrating and adjusting the dosing amount in situ; the dosing system overcomes the defects of the existing dosing system (or device), can calibrate and adjust the dosing flow (or dosing quantity) on site in the production field, can effectively solve the problems of dosing flow metering, adjustment, control and bias flow of the existing dosing system, can save the dosing quantity, and can meet the dosing requirement required by production; the method has the advantages of easy implementation, safety, reliability, wide application, easy popularization and the like.
The second technical problem to be solved by the invention is to provide a method for adjusting the dosing amount by the dosing system through in-situ calibration; the method overcomes the defects of dosing flow metering, adjusting and controlling of the existing dosing system (or device), can effectively solve the problems of dosing metering, adjusting, controlling and bias flow existing in the dosing system, can save dosing amount, and can meet the dosing requirement required by production; the method has the advantages of easy implementation, safety, reliability, wide application, easy popularization and the like.
In order to solve the first technical problem, the invention adopts the following technical scheme:
the invention relates to a medicine feeding system for in-situ calibration and adjustment of medicine feeding amount, which comprises a drip tank, a pressure guide port, a gas communicating pipe, a liquid level meter, a medicine discharging tee joint, a flow meter, an adjusting valve, a calibration switch valve and a medicine discharging pipe, wherein the pressure guide port is arranged on the drip tank;
the top of the drip tank is provided with a pressure guide port;
the bottom of the drip irrigation tank is communicated with one end of the medicine outlet pipe;
a calibration switch valve is arranged on the medicine outlet pipe, and the other end of the medicine outlet pipe is communicated with a side interface of the medicine outlet tee;
the upper port of the medicine outlet tee is communicated with the bottom port of the liquid level meter;
the top interface of the liquid level meter is communicated with one end of a gas communicating pipe, and the other end of the gas communicating pipe is communicated with the top of the drip tank;
the lower port of the medicine outlet tee is communicated with the inlet of the flowmeter;
the outlet of the flowmeter is communicated with the regulating valve;
the elevation of the top of the liquid level meter is equal to or higher than the elevation of the top of the drip irrigation tank, and the elevation of the bottom of the liquid level meter is equal to or lower than the elevation of the bottom of the drip irrigation tank.
The liquid level meter can meet the production requirement of on-site rapid observation (including but not limited to visual observation) or measurement of the volume of the medicament entering the liquid level meter under the pressure condition, and can meet the production requirement of calibrating and calibrating the flow meter; the shape, pressure rating, internal diameter, external diameter, and mounting of the gauge can be determined by those skilled in the art according to the prior art.
Furthermore, for the convenience of management, a lower interface of the medicine outlet tee joint is communicated with the regulating valve; the regulating valve is communicated with the inlet of the flowmeter.
Further: in order to facilitate installation, the medicine adding system for adjusting the medicine adding amount in a calibration mode on site comprises a drip tank, a pressure guide port, a gas communicating pipe, a liquid level meter, a connecting pipe fitting, a flowmeter, an adjusting valve, a calibration switch valve and a medicine outlet pipe;
the side surface of the lower part of the drip tank is communicated with one end of the medicine outlet pipe;
the other end of the medicine outlet pipe is communicated with a side interface at the lower part of the liquid level meter;
the side interface at the upper part of the liquid level meter is communicated with one end of a gas communicating pipe, and the other end of the gas communicating pipe is communicated with the side surface at the upper part of the drip tank;
the bottom interface of the liquid level meter is communicated with one end of the connecting pipe fitting;
the other end of the connecting pipe fitting is communicated with an inlet of the flowmeter;
the elevation of the top of the liquid level meter is equal to or higher than the elevation of the top of the drip irrigation tank, and the elevation of the bottom of the liquid level meter is equal to or lower than the elevation of the bottom of the drip irrigation tank.
Preferably, the lower port of the medicine outlet tee is communicated with the regulating valve; the regulating valve is communicated with the inlet of the flowmeter.
Further: in order to facilitate installation and observation, the side surface of the lower part of the drip tank is communicated with one end of the medicine outlet pipe; the other end of the gas communicating pipe is communicated with the side surface of the upper part of the drip tank; the elevation of the top of the liquid level meter is lower than that of the top of the drip irrigation tank, and the elevation of the bottom of the liquid level meter is higher than that of the bottom of the drip irrigation tank.
Preferably, the lower port of the medicine outlet tee is communicated with the regulating valve; the regulating valve is communicated with the inlet of the flowmeter.
Preferably: the bottom of the drip irrigation tank is communicated with one end of the medicine outlet pipe.
More preferably: the lower port of the medicine outlet tee is communicated with a regulating valve, and the regulating valve is communicated with the inlet of the flowmeter.
Furthermore, in order to facilitate safety management and maintenance, the medicine adding system for adjusting the medicine adding amount in a calibration mode on site comprises a drip tank, a pressure guide port, a gas communicating pipe, a liquid level meter, a connecting pipe fitting, a flowmeter, an adjusting valve, a calibration switch valve, a medicine outlet pipe, a medicine supplementing port, a standby port, an emptying port, a safety valve and a pressure gauge;
the pressure leading port is provided with a flange;
the top of the drip tank is provided with a vent, a safety valve and a pressure gauge;
the vent with the flange is connected and communicated with the top of the drip tank, the safety valve is connected and communicated with the drip tank, and the pressure gauge is connected and communicated with the top of the drip tank
The bottom of the drip irrigation tank is communicated with one end of a medicine outlet pipe, and the other end of the medicine outlet pipe is communicated with a side interface at the lower part of the liquid level meter;
the bottom interface of the liquid level meter is communicated with the connecting pipe fitting;
the connecting pipe fitting is communicated with an inlet of the flowmeter;
the inlet of the flowmeter is communicated with the regulating valve;
the other end of the gas communicating pipe is communicated with the top of the drip tank;
the medicine supplementing port is communicated with the bottom of the drip irrigation tank, and the standby port is communicated with the bottom of the drip irrigation tank;
the elevation of the top of the liquid level meter is equal to or higher than the elevation of the top of the drip irrigation tank, and the elevation of the bottom of the liquid level meter is equal to or lower than the elevation of the bottom of the drip irrigation tank.
Preferably, the connecting pipe fitting is communicated with the regulating valve by threads; the regulating valve is communicated with the inlet of the flowmeter.
Further, the drip tank, the pressure guiding port, the gas communicating pipe, the medicine outlet tee joint, the medicine outlet pipe, the medicine supplementing port, the standby port and the emptying port are made of carbon steel or other metals; the regulating valve, the calibration switch valve and the safety valve are steel valves or other metal valves; the flowmeter and the liquid level meter are made of steel or other metals; the connecting pipe fitting is a high-pressure hose reinforced by steel wires or other high-strength fibers; the bracket is made of nonmetal.
Further, the flowmeter is any one of a gear flowmeter, a rotor flowmeter, an ultrasonic flowmeter, an external clamp type ultrasonic flowmeter, a portable ultrasonic flowmeter, an electromagnetic flowmeter, a float flowmeter, a water meter, an amoebic flowmeter, a bent pipe flowmeter, a balance flowmeter, a wedge flowmeter, a target flowmeter, a vortex flowmeter, a turbine flowmeter, an orifice plate flowmeter, a vortex flowmeter and a differential pressure flowmeter.
Further, the liquid level meter is any one of a magnetic turning plate liquid level meter, a magnetic floater type liquid level meter, a magnetic sensitive electronic double-color liquid level meter, a glass tube liquid level meter, a glass plate type liquid level meter, a color quartz tube type liquid level meter, a sight glass type liquid level meter and an ultrasonic liquid level meter.
Furthermore, the liquid level meter is a remote transmission type magnetic float type liquid level meter which is manufactured by utilizing a buoyancy principle, a magnetic coupling effect, a sensor, a transmitter and a display instrument.
Further, for signal remote transmission, the liquid level meter comprises a shell with a flange, a magnetic floating ball liquid level transmitter with a flange, an upper interface and a bottom interface; the lower end of the magnetic floating ball liquid level transmitter extends to the lower part in the shell, and the upper end of the magnetic floating ball liquid level transmitter is connected with a flange at the top of the shell;
the magnetic floating ball liquid level transmitter can convert the liquid level into a standard electric signal and remotely transmit the standard electric signal; when the liquid level changes, the static pressure type liquid level transmitter can effectively measure the liquid level.
Further, for signal remote transmission, the liquid level meter comprises a threaded shell, a threaded static pressure type liquid level transmitter, an upper interface and a bottom interface, wherein the lower end of the static pressure type liquid level transmitter extends to the lower part in the shell, and the upper part of the static pressure type liquid level transmitter is in threaded connection with the top of the shell;
the static pressure type liquid level transmitter is a magnetostrictive liquid level transmitter;
the static pressure type liquid level transmitter can convert the liquid level into a standard electric signal and transmit the standard electric signal remotely; when the liquid level changes, the static pressure type liquid level transmitter can effectively measure the liquid level.
Further, for signal remote transmission, the liquid level meter comprises a shell, a pressure transmitter, an upper interface and a bottom interface, wherein the pressure transmitter is arranged at the lower part of the shell;
the pressure transmitter can convert the liquid level into a standard electric signal and transmit the standard electric signal remotely; when the liquid level changes, pressure transmitter can carry out effective measurement to the liquid level.
Further, in order to reduce the cost, the liquid level meter comprises a shell, a pressure gauge, a top connector and a bottom connector, wherein the pressure gauge is arranged at the lower part of the shell;
the pressure gauge is a precision pressure gauge with 0.1-level precision.
Further, in order to reduce the cost, the liquid level meter comprises a shell, a magnetic float, a top interface, colored iron powder and a bottom interface, wherein the magnetic float is arranged in the shell, and the colored iron powder is arranged outside the shell and at a position corresponding to the magnetic float;
the working principle is as follows: when the magnetic float rises or falls down along with the liquid level, the colored iron powder on the outer wall of the shell rises or falls along with the magnetic float, and the liquid level can be indicated.
Further, in order to maintain pressure, the drip tank is a closed container or/and a pressure container.
In order to solve the second technical problem, the method for adjusting the dosing amount by in-situ calibration of the dosing system of the invention adopts a first technical scheme that: the method for adjusting the dosing flow of the dosing system through in-situ calibration in the dosing process of the natural gas pipeline comprises the following steps:
1) erecting a drip tank:
placing the drip tank on the bracket, so that the elevation of the bottom of the drip tank is higher than the elevation of the top of the natural gas pipeline;
the bracket is made of any one of a metal material and a non-metal material;
2) connecting and balancing pressure:
on the upper part or the top of the natural gas pipeline, a pressure guiding pipe is used for connecting and communicating a pressure guiding port with the natural gas pipeline, so that the pressure in the drip tank and the liquid level meter is automatically balanced with the pressure in the natural gas pipeline;
the upper part or the top of the natural gas pipeline is communicated with the regulating valve and the natural gas pipeline by a pesticide conveying pipe;
3) balancing liquid level:
opening a calibration switch valve to automatically balance liquid levels in the drip tank and the liquid level meter;
4) drip the medicament in the level gauge:
closing the calibration switch valve, opening the regulating valve, and allowing the medicament in the liquid level meter to sequentially pass through the medicament outlet tee joint, the flowmeter, the regulating valve and the medicament conveying pipe under the action of gravity and enter the natural gas pipeline;
5) timing read data
Timing by using a stopwatch, and reading the liquid level scale value of the liquid level meter when the timing is started and ended; simultaneously reading instantaneous flow values of the flowmeter at the beginning and the end of timing;
6) calculating the mean value
Calculating the medicine discharging volume of the liquid level meter within the timing time according to the liquid level scale value of the liquid level meter at the beginning and the end of timing and the known inner diameter of the liquid level meter, and further calculating the medicine discharging flow of the liquid level meter within unit time; calculating the average instantaneous flow of the flowmeter within the timing time according to the instantaneous flow values of the flowmeter at the beginning and the end of timing;
7) calculating in-situ calibrated metering error of a flowmeter
Calculating the local calibration metering error of the flowmeter according to a formula of 'the local calibration metering error of the flowmeter ═ the medicine flow rate of the liquid level meter in the step 6) ÷ the average instantaneous flow rate of the flowmeter in the step 6) ÷ the medicine flow rate of the liquid level meter in the step 6) × 100%';
8) adjusting and calibrating the medicine-adding flow
Opening the calibration switch valve, automatically balancing the liquid level in the drip tank and the liquid level meter, and allowing the medicament in the drip tank to sequentially pass through the medicament outlet pipe, the calibration switch valve, the medicament outlet tee joint, the flowmeter, the regulating valve and the medicament conveying pipe under the action of gravity to enter the natural gas pipeline;
adjusting the opening of the regulating valve, calibrating according to the in-situ calibration metering error in the step 7), correcting the instantaneous flow reading of the flowmeter, and adjusting the dosing flow to the required dosing flow.
Further, for convenience of management, in step 2): the natural gas pipeline is vertically connected and communicated with the upper part or the top part of the natural gas pipeline by a valve, and then a pressure guiding pipe is used for connecting and communicating a pressure guiding opening and the valve; opening the valve to automatically balance the pressure in the drip tank and the liquid level meter with the pressure in the natural gas pipeline;
the valve is vertically connected and communicated with the upper part or the top of the natural gas pipeline, and then the regulating valve is connected and communicated with the
In order to solve the second technical problem, the method for adjusting the dosing amount by in-situ calibration of the dosing system of the invention adopts a second technical scheme that: the method for adjusting the dosing flow of the dosing system through in-situ calibration in the dosing process of the gas well casing comprises the following steps:
1) erecting a drip tank:
placing the drip tank on the bracket, so that the elevation of the bottom of the drip tank is higher than the elevation of the central line of the sleeve valve;
the bracket is made of any one of a metal material and a non-metal material;
2) connecting and balancing pressure:
connecting and communicating a junction pipe with one closed end with a sleeve valve;
connecting and communicating the pressure guiding port with the top of the junction pipe by using a pressure guiding pipe, and opening a sleeve valve to automatically balance the pressure in the drip tank and the liquid level meter with the pressure in the sleeve;
the regulating valve is communicated with the top of the junction pipe by a medicine conveying pipe;
3) balancing liquid level:
opening a calibration switch valve to automatically balance liquid levels in the drip tank and the liquid level meter;
4) drip the medicament in the level gauge:
closing the calibration switch valve, opening the regulating valve, and allowing the medicament in the liquid level meter to sequentially pass through the medicament outlet tee joint, the flow meter, the regulating valve, the medicament conveying pipe, the junction pipe and the sleeve valve under the action of gravity to enter the sleeve;
5) timing read data
Timing by using a stopwatch, and reading the liquid level scale value of the liquid level meter when the timing is started and ended; simultaneously reading instantaneous flow values of the flowmeter at the beginning and the end of timing;
6) calculating the mean value
Calculating the medicine discharging volume of the liquid level meter within the timing time according to the liquid level scale value of the liquid level meter at the beginning and the end of timing and the known inner diameter of the liquid level meter, and further calculating the medicine discharging flow of the liquid level meter within unit time; calculating the average instantaneous flow of the flowmeter within the timing time according to the instantaneous flow values of the flowmeter at the beginning and the end of timing;
7) calculating in-situ calibrated metering error of a flowmeter
Calculating the local calibration metering error of the flowmeter according to a formula of 'the local calibration metering error of the flowmeter ═ the medicine flow rate of the liquid level meter in the step 6) ÷ the average instantaneous flow rate of the
8) adjusting and calibrating the medicine-adding flow
Opening the calibration switch valve, automatically balancing the liquid level in the drip tank and the liquid level meter, and simultaneously enabling the medicament in the drip tank to sequentially pass through the medicament outlet pipe, the calibration switch valve, the medicament outlet tee joint, the flow meter, the regulating valve, the medicament conveying pipe, the junction pipe and the sleeve valve to enter the sleeve under the action of gravity;
adjusting the opening of the regulating valve, calibrating according to the in-situ calibration metering error in the step 7), correcting the instantaneous flow reading of the flowmeter, and adjusting the dosing flow to the required dosing flow.
Further, for convenience of management, in step 2): the top of the collecting pipe is connected and communicated with the top of the collecting pipe through threads by a valve, and then a pressure guiding pipe is used for connecting and communicating a pressure guiding opening with the valve; opening the valve and the sleeve valve to automatically balance the pressure in the drip tank and the liquid level meter with the pressure in the sleeve;
the top of the junction pipe is connected and communicated with the top of the junction pipe through a valve by screw threads, and then the regulating valve is connected and communicated with the valve through a medicine conveying pipe; opening the valve to connect and communicate the regulating valve with the sleeve;
in order to solve the second technical problem, the third technical scheme adopted by the method for adjusting the dosing amount by the on-site calibration of the dosing system is as follows: the method for adjusting the dosing flow of the dosing system through in-situ calibration in the dosing process of the gas well ground pipeline comprises the following steps:
1) erecting a drip tank:
placing the drip tank on the bracket, so that the elevation of the bottom of the drip tank is higher than the elevation of the central line of the sleeve valve;
the bracket is made of any one of a metal material and a non-metal material;
2) connecting and balancing pressure:
the pressure guiding pipe is used for connecting and communicating the pressure guiding port with the oil pipe valve through threads, and the oil pipe valve is opened, so that the pressure in the drip tank and the liquid level meter is automatically balanced with the pressure in the oil pipe;
the regulating valve is communicated with the ground pipeline by a medicine conveying pipe through threaded connection; opening an outlet valve of the oil pipe to connect and communicate the regulating valve with the ground pipeline and the oil pipe;
3) balancing liquid level:
opening a calibration switch valve to automatically balance liquid levels in the drip tank and the liquid level meter;
4) drip the medicament in the level gauge:
closing the calibration switch valve, opening the regulating valve, and allowing the medicament in the liquid level meter to sequentially pass through the medicament outlet tee joint, the flowmeter, the regulating valve and the medicament conveying pipe under the action of gravity and enter a ground pipeline;
5) timing read data
Timing by using a stopwatch, and reading the liquid level scale value of the liquid level meter when the timing is started and ended; simultaneously reading instantaneous flow values of the flowmeter at the beginning and the end of timing;
6) calculating the mean value
Calculating the medicine discharging volume of the liquid level meter within the timing time according to the liquid level scale value of the liquid level meter at the beginning and the end of timing and the known inner diameter of the liquid level meter, and further calculating the medicine discharging flow of the liquid level meter within unit time; calculating the average instantaneous flow of the flowmeter within the timing time according to the instantaneous flow values of the flowmeter at the beginning and the end of timing;
7) calculating in-situ calibrated metering error of a flowmeter
Calculating the local calibration metering error of the flowmeter according to a formula of 'the local calibration metering error of the flowmeter ═ the medicine flow rate of the liquid level meter in the step 6) ÷ the average instantaneous flow rate of the flowmeter in the step 6) ÷ the medicine flow rate of the liquid level meter in the step 6) × 100%';
8) adjusting and calibrating the medicine-adding flow
Opening the calibration switch valve, automatically balancing the liquid level in the drip tank and the liquid level meter, and allowing the medicament in the drip tank to sequentially pass through the medicament outlet pipe, the calibration switch valve, the medicament outlet tee joint, the flow meter, the regulating valve and the medicament conveying pipe under the action of gravity to enter the ground pipeline;
adjusting the opening of the regulating valve, calibrating according to the in-situ calibration metering error in the step 7), correcting the instantaneous flow reading of the flowmeter, and adjusting the dosing flow to the required dosing flow.
Further, for convenience of management, in step 2): firstly, connecting and communicating the valve with an oil pipe valve by using a valve, and then connecting and communicating a pressure guiding port with the valve by using a pressure guiding pipe; opening the valve and the oil pipe valve to automatically balance the pressure in the drip tank and the liquid level meter with the pressure in the oil pipe;
firstly, connecting and communicating with a ground pipeline by using a valve, and then connecting and communicating an adjusting valve with the valve by using a medicine conveying pipe; and opening the valve and the outlet valve of the oil pipe to connect and communicate the regulating valve with the ground pipeline and the oil pipe.
In order to solve the second technical problem, the fourth technical scheme adopted by the method for adjusting the dosing amount by the on-site calibration of the dosing system of the invention is as follows: the method for adjusting the dosing flow of the dosing system through in-situ calibration in the dosing process of the oil jacket differential pressure ground pipeline comprises the following steps:
1) erecting a drip tank:
placing the drip tank on the bracket, so that the elevation of the bottom of the drip tank is higher than the elevation of the central line of the sleeve valve;
the bracket is made of any one of a metal material and a non-metal material;
2) connecting and balancing pressure:
the pressure guiding pipe is used for connecting and communicating the pressure guiding port with the sleeve valve through threads, and the sleeve valve is opened, so that the pressure in the drip tank and the liquid level meter is automatically balanced with the pressure in the sleeve;
the regulating valve is communicated with the ground pipeline by a medicine conveying pipe through threaded connection; opening an outlet valve of the oil pipe to connect and communicate the regulating valve with the ground pipeline and the oil pipe;
3) balancing liquid level:
opening a calibration switch valve to automatically balance liquid levels in the drip tank and the liquid level meter;
4) drip the medicament in the level gauge:
closing the calibration switch valve, opening the regulating valve, and allowing the medicament in the liquid level meter to sequentially pass through the medicament outlet tee joint, the flowmeter, the regulating valve and the medicament conveying pipe to enter a ground pipeline under the action of the sleeve pressure;
5) timing read data
Timing by using a stopwatch, and reading the liquid level scale value of the liquid level meter when the timing is started and ended; simultaneously reading instantaneous flow values of the flowmeter at the beginning and the end of timing;
6) calculating the mean value
Calculating the medicine discharging volume of the liquid level meter within the timing time according to the liquid level scale value of the liquid level meter at the beginning and the end of timing and the known inner diameter of the liquid level meter, and further calculating the medicine discharging flow of the liquid level meter within unit time; calculating the average instantaneous flow of the flowmeter within the timing time according to the instantaneous flow values of the flowmeter at the beginning and the end of timing;
7) calculating in-situ calibrated metering error of a flowmeter
Calculating the local calibration metering error of the flowmeter according to a formula of 'the local calibration metering error of the flowmeter ═ the medicine flow rate of the liquid level meter in the step 6) ÷ the average instantaneous flow rate of the flowmeter in the step 6) ÷ the medicine flow rate of the liquid level meter in the step 6) × 100%';
8) adjusting and calibrating the medicine-adding flow
Opening the calibration switch valve, automatically balancing the liquid level in the drip tank and the liquid level meter, and simultaneously enabling the medicament in the drip tank to sequentially enter a ground pipeline through the medicament outlet pipe, the calibration switch valve, the medicament outlet tee joint, the flowmeter, the regulating valve and the medicament conveying pipe under the action of the pressure of the casing pipe;
adjusting the opening of the regulating valve, calibrating according to the in-situ calibration metering error in the step 7), correcting the instantaneous flow reading of the flowmeter, and adjusting the dosing flow to the required dosing flow.
Further, for convenience of management, in step 2): firstly, connecting and communicating a valve with a sleeve valve, and then connecting and communicating a pressure guiding opening with the valve by using a pressure guiding pipe; opening the valve and the sleeve valve to automatically balance the pressure in the drip tank and the liquid level meter with the pressure in the sleeve;
firstly, connecting and communicating with a ground pipeline by using a valve, and then connecting and communicating an adjusting valve with the ground pipeline by using a thread by using a medicine conveying pipe; and opening the valve and the outlet valve of the oil pipe to connect and communicate the regulating valve with the ground pipeline and the oil pipe.
In order to solve the second technical problem, the method for adjusting the dosing amount by in-situ calibration of the dosing system of the invention adopts a fifth technical scheme that: the method for adjusting the dosing flow of the dosing system through in-situ calibration in the dosing process of the oil well casing comprises the following steps:
1) erecting a drip tank:
placing the drip tank on the bracket, so that the elevation of the bottom of the drip tank is higher than the elevation of the central line of the sleeve valve;
the bracket is made of any one of a metal material and a non-metal material;
2) connecting and balancing pressure:
connecting and communicating the junction pipe with one closed end with an oil well casing valve through pipe threads;
the pressure guiding port is communicated with the top of the junction pipe by a pressure guiding pipe through thread connection, and an oil well casing valve is opened to ensure that the pressure in the drip tank and the liquid level meter is automatically balanced with the pressure in the oil well casing;
the regulating valve is communicated with the junction pipe through a medicine conveying pipe by screw connection;
3) balancing liquid level:
opening a calibration switch valve to automatically balance liquid levels in the drip tank and the liquid level meter;
4) drip the medicament in the level gauge:
closing the calibration switch valve, opening the regulating valve, and allowing the medicament in the liquid level meter to enter the oil well casing through the medicament outlet tee joint, the flow meter, the regulating valve, the medicament conveying pipe, the junction pipe and the oil well casing valve in sequence under the action of gravity;
5) timing read data
Timing by using a stopwatch, and reading the liquid level scale value of the liquid level meter when the timing is started and ended; simultaneously reading instantaneous flow values of the flowmeter at the beginning and the end of timing;
6) calculating the mean value
Calculating the medicine discharging volume of the liquid level meter within the timing time according to the liquid level scale value of the liquid level meter at the beginning and the end of timing and the known inner diameter of the liquid level meter, and further calculating the medicine discharging flow of the liquid level meter within unit time; calculating the average instantaneous flow of the flowmeter within the timing time according to the instantaneous flow values of the flowmeter at the beginning and the end of timing;
7) calculating in-situ calibrated metering error of a flowmeter
Calculating the local calibration metering error of the flowmeter according to a formula of 'the local calibration metering error of the flowmeter ═ the medicine flow rate of the liquid level meter in the step 6) ÷ the average instantaneous flow rate of the flowmeter in the step 6) ÷ the medicine flow rate of the liquid level meter in the step 6) × 100%';
8) adjusting and calibrating the medicine-adding flow
Opening a calibration switch valve, automatically balancing the liquid level in the drip tank and the liquid level meter, and simultaneously enabling the medicament in the drip tank to sequentially pass through a medicament outlet pipe, the calibration switch valve, a medicament outlet tee joint, a flowmeter, an adjusting valve, a medicament conveying pipe, a junction pipe and an oil well casing valve under the action of gravity to enter an oil well casing;
adjusting the opening of the regulating valve, calibrating according to the in-situ calibration metering error in the step 7), correcting the instantaneous flow reading of the flowmeter, and adjusting the dosing flow to the required dosing flow.
Further, for convenience of management, in step 2): firstly, a valve is communicated with the top or the upper part of the junction pipe, and then a pressure guiding pipe is used for communicating a pressure guiding opening with the valve; opening the valve and the oil well casing valve to make the pressure in the drip tank and the liquid level meter automatically balance with the pressure in the oil well casing;
the valve is connected and communicated with the junction pipe firstly, and then the regulating valve is connected and communicated with the valve by the medicine conveying pipe; and opening the valve to connect and communicate the regulating valve with the oil well casing.
The invention has the following beneficial effects: the invention overcomes the defects of dosing flow metering, adjusting and controlling of the existing dosing system, can calibrate and adjust the dosing flow (or dosing quantity) on site in a production field, can effectively solve the problems of dosing flow metering, adjusting, controlling and bias flow of the dosing system, can save the dosing quantity, and can meet the dosing requirement required by production; the method has the advantages of easy implementation, safety, reliability, wide application, easy popularization and the like.
Drawings
The following detailed description of embodiments of the invention is provided in connection with the accompanying drawings
FIG. 1 is a schematic view of a prior art 1-pump 2-tube dosing system;
FIG. 2 is a schematic diagram of a prior art flowmeter calibration apparatus;
FIG. 3 is a schematic view of the dosing system of example 1;
FIG. 4 is a schematic view of the dosing system of example 2;
FIG. 5 is a schematic view of the dosing system of example 3;
FIG. 6 is a schematic view of the dosing system of example 4;
FIG. 7 is a schematic view of the dosing system of example 5;
FIG. 8 is a schematic view of the dosing system of example 6;
FIG. 9 is a schematic view of the dosing system of example 7;
FIG. 10 is a schematic view of the drug administration system of example 8;
FIG. 11 is a schematic view of the drug administration system of example 9;
FIG. 12 is a schematic view of the drug administration system of example 10;
FIG. 13 is a schematic view of a liquid level gauge in embodiment 15;
FIG. 14 is a schematic view of a liquid level gauge in embodiment 16;
FIG. 15 is a schematic view of a liquid level gauge in embodiment 17;
FIG. 16 is a schematic view of a liquid level gauge in embodiment 18;
FIG. 17 is a schematic view of a liquid level gauge in embodiment 19;
FIG. 18 is a schematic view of an atmospheric calibration test apparatus for a flowmeter in example 1;
FIG. 19 is a schematic diagram of the in situ calibration and adjustment of dosing flow rate for a natural gas line according to example 21;
FIG. 20 is a schematic illustration of the in situ calibration adjustment method for dosing flow to a gas well casing according to example 22;
FIG. 21 is a schematic view of the in situ calibration and adjustment method for dosing a natural gas line according to example 23;
FIG. 22 is a schematic illustration of the in situ calibration adjustment method for dosing flow to a gas well casing according to example 24;
FIG. 23 is a schematic illustration of the in situ calibration method for adjusting the dosing flow rate of the gas well surface pipeline in example 25;
FIG. 24 is a schematic illustration of a method for in situ calibration of the regulated flow of chemicals to the surface pipeline of a gas well in example 26;
FIG. 25 is a schematic diagram of the in situ calibration adjustment of differential pressure oil jacket ground line dosing flow method of example 27;
FIG. 26 is a schematic diagram of the in situ calibration adjustment of differential pressure oil jacket ground line dosing flow method of example 28;
FIG. 27 is a schematic illustration of the in situ calibration adjusted oil well casing dosing flow method of example 29;
FIG. 28 is a schematic illustration of the method of adjusting the charge flow rate of an oil well casing for in situ calibration in example 30.
Detailed Description
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