阅读说明：本技术 一种双控恒压流体输送泵及其使用方法 (Double-control constant-pressure fluid delivery pump and using method thereof ) 是由 王伟涛 宋伟杰 朱庆凯 李建平 刘光磊 武思宇 于 2021-03-18 设计创作，主要内容包括：本发明公开了一种双控恒压流体输送泵及其使用方法,属于注浆设备领域,包括底座、控制箱、变频电机、导轮、皮带、曲轴箱、曲轴、连杆、销轴、顶杆、柱塞、活塞、调压旋钮、单向阀、数显压力传感器、溢流阀、油箱、入口单向阀、出口单向阀、汇流管、安全阀、柱塞高压腔；采用一种双控恒压流体输送泵进行施工,主要遇到正常状态的使用、正常状态到压力变大的状态时使用、压力变大的状态到正常状态时使用和恒压失控时的使用四种状态。本发明通过设置双控结构,对注浆设备采取双重保护,使得注浆过程中憋压的现象不会对设备造成损坏,也不会影响施工速度。(The invention discloses a double-control constant-pressure fluid delivery pump and a use method thereof, belonging to the field of grouting equipment and comprising a base, a control box, a variable frequency motor, a guide wheel, a belt, a crankcase, a crankshaft, a connecting rod, a pin shaft, an ejector rod, a plunger, a piston, a pressure regulating knob, a one-way valve, a digital display pressure sensor, an overflow valve, an oil tank, an inlet one-way valve, an outlet one-way valve, a collecting pipe, a safety valve and a plunger high-pressure cavity; the double-control constant-pressure fluid delivery pump is used for construction, and mainly meets four states of use in a normal state, use in a state from the normal state to a state with increased pressure, use in a state with increased pressure to the normal state and use in a state with constant pressure out of control. According to the invention, the double-control structure is arranged, and the grouting equipment is protected doubly, so that the pressure building phenomenon in the grouting process can not damage the equipment, and the construction speed can not be influenced.)

1. A double-control constant-pressure fluid delivery pump is characterized by comprising a base, a control box, a variable frequency motor, a guide wheel, a belt, a crankcase, a crankshaft, a connecting rod, a pin shaft, an ejector rod, a plunger, a piston, a pressure regulating knob, a one-way valve, a digital display pressure sensor, an overflow valve, an oil tank, an inlet one-way valve, an outlet one-way valve, a collecting pipe, a safety valve and a plunger high-pressure cavity; the control box, the variable frequency motor and the crankcase are all installed on the base through bolts, the guide wheel is installed on the crankcase, the variable frequency motor and the guide wheel are connected through a belt, the crankshaft is installed in the crankcase, the connecting rod is connected to the crankshaft, the connecting rod is connected with the ejector rod through a pin shaft, the ejector rod and the plunger are in hinged transmission, a piston is installed in the plunger, a plunger high-pressure cavity is isolated between the plunger and the piston, the check valve, the digital display pressure sensor and the overflow valve are all communicated with the plunger high-pressure cavity, the pressure regulating knob is connected with the check valve through an oil pipe, the overflow valve is connected with an oil tank through an oil pipe, and the.

2. The dual-control constant-pressure fluid delivery pump as claimed in claim 1, wherein the control box is provided with a sensing and receiving device, and the sensing and receiving device monitors the value of the digital display pressure sensor in real time and transmits the data back to the control box.

3. The dual control constant pressure fluid delivery pump as claimed in claim 1, wherein an oil seal and a guide ring are installed between the plunger and the piston.

4. The dual control constant pressure fluid delivery pump according to claim 1, wherein the piston volume is not more than half of the plunger volume.

5. The dual control constant pressure fluid delivery pump according to claim 1, wherein the maximum flow rate that the relief valve can pass per unit time is not less than the maximum flow rate that the check valve can pass per unit time.

6. The use method of the double-control constant-pressure fluid delivery pump is characterized in that the following processes are adopted for construction under different construction working conditions:

the method comprises the following steps: checking device security

Checking the reliability of the digital display pressure sensor, checking the safety of all valves and checking the running conditions of the control box and the variable frequency motor;

step two: use of Normal State

Adjusting a pressure regulating knob to enable high-pressure oil to enter a plunger high-pressure cavity, adjusting the pressure in the plunger high-pressure cavity to be 1 MPa-5 MPa higher than a set value of a control box according to a numerical value of a digital display pressure sensor, starting a variable frequency motor through the control box, driving a belt pulley to move by the variable frequency motor, driving a crankshaft to rotate by the belt pulley, driving a connecting rod to move by the crankshaft, enabling an ejector rod to move in a guide sleeve by the connecting rod, driving a plunger to move by the ejector rod, driving a piston to move by the plunger, enabling slurry to enter from an inlet one-way valve and flow out from an outlet one-;

step three: used from normal state to increased pressure state

When the working condition changes, the load outside the outlet one-way valve is increased, high-pressure oil in the plunger high-pressure cavity enters an oil tank through an overflow valve, meanwhile, a sensing receiving device arranged on a control box monitors that the numerical value of a digital display pressure sensor exceeds the set value of the control box, and the control box controls a variable frequency motor to gradually reduce the running speed until the numerical value of the digital display pressure sensor is less than or equal to the set value of the control box;

step four: used when the pressure is increased to the normal state

When the working condition changes, the load outside the outlet one-way valve is reduced, the pressure in the high-pressure cavity of the plunger piston is displayed by the digital display pressure sensor, the sensing receiving device arranged on the control box monitors that the numerical value of the digital display pressure sensor is continuously reduced, and the control box controls the variable frequency motor to gradually increase the running speed until the maximum rotating speed of the variable frequency motor;

step five: use when constant pressure is out of control

When the pressure is increased from a normal state, at least one of the sensing receiving device and the digital display pressure sensor breaks down, the high-pressure cavity of the plunger loses the protection capability, at the moment, the control box cannot effectively control the variable-frequency motor to effectively rotate downwards, the safety valve is broken under high pressure, and the system is forced to unload.

7. The method of claim 6, wherein the maximum pressure in the high pressure chamber of the plunger is less than the pressure at which the safety valve is broken.

8. The use method of the double-control constant-pressure fluid delivery pump according to claim 6, wherein in the fourth step, when the sensing receiving device mounted on the control box monitors that the numerical value of the digital display pressure sensor continuously decreases, the pressure regulating knob is adjusted to enable the high-pressure oil to enter the plunger high-pressure cavity until the pressure in the plunger high-pressure cavity reaches the initial set pressure in the plunger high-pressure cavity in the second step.

Technical Field

The invention relates to the field of grouting equipment, in particular to a double-control constant-pressure fluid delivery pump and a using method thereof.

Background

The hydraulic grouting pump is mainly applied to engineering construction in the fields of railway and highway tunnels, water conservancy and hydropower, subway tunnels, mine roadways, military facilities, various underground buildings, emergency rescue and the like. The hydraulic grouting pump is mainly applied to projects such as pipe jacking grouting, bentonite grouting, post grouting (plug opening grouting), high-pressure grouting, secondary grouting, basement water and leakage prevention and plugging. In the reciprocating motion process of the piston, when the piston moves outwards, the outlet check valve is closed under the action of self weight and pressure difference, and the inlet check valve is opened under the action of pressure difference to suck liquid into the pump cavity. When the piston is pressed inwards, the pressure in the pump cavity is increased, the inlet check valve is closed, and the outlet check valve is opened to press the liquid into the outlet pipeline.

The grouting pump is a key device in the grouting construction process, so that the grouting pump with good performance and effect should be used as much as possible. However, most of the grouting processes of the existing grouting pump are to pump mud into the slurry pumping cylinder through the oil hydraulic pump and then extrude the mud, the pumping and extruding processes cannot be carried out simultaneously, and the operation frequency of the oil hydraulic pump needs to be increased to improve the overall efficiency. When meeting the great operating mode of stratum change in the work progress, the condition that slip casting pressure often appears steeply increasing, and inverter motor's reaction time is longer simultaneously, causes the suppress pressure easily, leads to the relief valve to break to influence normal construction, influenced slip casting efficiency and increased slip casting time and cost. Therefore, in order to solve the above problems, the present invention provides a dual-control constant-pressure fluid delivery pump and a method for using the same.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides a double-control constant-pressure fluid delivery pump and a using method thereof, and overcomes the defects in the prior art. Through setting up two accuse structures, take duplicate protection to grouting equipment for the phenomenon of suppressing the pressure in the slip casting process can not cause the damage to equipment, can not influence the construction speed yet.

In order to achieve the purpose, the invention adopts the following technical scheme:

a double-control constant-pressure fluid delivery pump is characterized by comprising a base, a control box, a variable frequency motor, a guide wheel, a belt, a crankcase, a crankshaft, a connecting rod, a pin shaft, an ejector rod, a plunger, a piston, a pressure regulating knob, a one-way valve, a digital display pressure sensor, an overflow valve, an oil tank, an inlet one-way valve, an outlet one-way valve, a collecting pipe, a safety valve and a plunger high-pressure cavity; the control box, the variable frequency motor and the crankcase are all installed on the base through bolts, the guide wheel is installed on the crankcase, the variable frequency motor and the guide wheel are connected through a belt, the crankshaft is installed in the crankcase, the connecting rod is connected to the crankshaft, the connecting rod is connected with the ejector rod through a pin shaft, the ejector rod and the plunger are in hinged transmission, a piston is installed in the plunger, a plunger high-pressure cavity is isolated between the plunger and the piston, the check valve, the digital display pressure sensor and the overflow valve are all communicated with the plunger high-pressure cavity, the pressure regulating knob is connected with the check valve through an oil pipe, the overflow valve is connected with an oil tank through an oil pipe, and the.

Preferably, the control box is provided with a sensing receiving device, and the sensing receiving device monitors the numerical value of the digital display pressure sensor in real time and transmits the data back to the control box.

Preferably, an oil seal and a guide ring are installed between the plunger and the piston.

Preferably, the piston volume is no more than half of the plunger volume.

Preferably, the maximum flow rate which can be passed by the overflow valve in unit time is not less than the maximum flow rate which can be passed by the one-way valve in unit time.

A use method of a double-control constant-pressure fluid delivery pump adopts the following processes to carry out construction under different construction working conditions:

the method comprises the following steps: checking device security

Checking the reliability of the digital display pressure sensor, checking the safety of all valves and checking the running conditions of the control box and the variable frequency motor;

step two: use of Normal State

Adjusting a pressure regulating knob to enable high-pressure oil to enter a plunger high-pressure cavity, adjusting the pressure in the plunger high-pressure cavity to be 1 MPa-5 MPa higher than a set value of a control box according to a numerical value of a digital display pressure sensor, starting a variable frequency motor through the control box, driving a belt pulley to move by the variable frequency motor, driving a crankshaft to rotate by the belt pulley, driving a connecting rod to move by the crankshaft, enabling an ejector rod to move in a guide sleeve by the connecting rod, driving a plunger to move by the ejector rod, driving a piston to move by the plunger, enabling slurry to enter from an inlet one-way valve and flow out from an outlet one-;

step three: used from normal state to increased pressure state

When the working condition changes, the load outside the outlet one-way valve is increased, high-pressure oil in the plunger high-pressure cavity enters an oil tank through an overflow valve, meanwhile, a sensing receiving device arranged on a control box monitors that the numerical value of a digital display pressure sensor exceeds the set value of the control box, and the control box controls a variable frequency motor to gradually reduce the running speed until the numerical value of the digital display pressure sensor is less than or equal to the set value of the control box;

step four: used when the pressure is increased to the normal state

When the working condition changes, the load outside the outlet one-way valve is reduced, the pressure in the high-pressure cavity of the plunger piston is displayed by the digital display pressure sensor, the sensing receiving device arranged on the control box monitors that the numerical value of the digital display pressure sensor is continuously reduced, and the control box controls the variable frequency motor to gradually increase the running speed until the maximum rotating speed of the variable frequency motor;

step five: use when constant pressure is out of control

When the pressure is increased from a normal state, at least one of the sensing receiving device and the digital display pressure sensor breaks down, the high-pressure cavity of the plunger loses the protection capability, at the moment, the control box cannot effectively control the variable-frequency motor to effectively rotate downwards, the safety valve is broken under high pressure, and the system is forced to unload.

Preferably, the maximum pressure in the plunger high pressure chamber is less than the pressure at which the relief valve ruptures.

Preferably, in the fourth step, when the sensing receiving device mounted on the control box monitors that the numerical value of the digital display pressure sensor continuously decreases, the pressure regulating knob is regulated to enable the high-pressure oil to enter the plunger high-pressure cavity until the pressure in the plunger high-pressure cavity reaches the initial set pressure in the plunger high-pressure cavity in the second step.

The invention has the following beneficial technical effects:

through setting up two accuse structures, take duplicate protection to grouting equipment for the phenomenon of suppressing the pressure in the slip casting process can not cause the damage to equipment, can not influence the construction speed yet.

Drawings

Fig. 1 is a schematic structural diagram of a dual-control constant-pressure fluid delivery pump and a method for using the same according to the present invention.

Fig. 2 is a partially enlarged view of the structure of a dual-control constant-pressure fluid delivery pump and a method for using the same according to the present invention.

The device comprises a base 1, a control box 2, a variable frequency motor 3, a guide wheel 4, a belt 5, a crankcase 6, a crankshaft 7, a connecting rod 8, a pin shaft 9, a mandril 10, a plunger 11, a piston 12, a pressure regulating knob 13, a check valve 14, a digital display pressure sensor 15, an overflow valve 16, an oil tank 17, an inlet check valve 18, an outlet check valve 19, a collecting pipe 20, a safety valve 21 and a plunger high-pressure cavity 22.

Detailed Description

The invention is described in further detail below with reference to the following figures and detailed description:

example 1:

as shown in fig. 1-2, a double-control constant-pressure fluid delivery pump is characterized by comprising a base 1, a control box 2, a variable frequency motor 3, a guide wheel 4, a belt 5, a crankcase 6, a crankshaft 7, a connecting rod 8, a pin shaft 9, a top rod 10, a plunger 11, a piston 12, a pressure regulating knob 13, a check valve 14, a digital display pressure sensor 15, an overflow valve 16, an oil tank 17, an inlet check valve 18, an outlet check valve 19, a collecting pipe 20, a safety valve 21 and a plunger high-pressure cavity 22; the control box 2, the variable frequency motor 3 and the crankcase 6 are all installed on the base 1 through bolts, the guide wheel 4 is installed on the crankcase 6, the variable frequency motor 3 is connected with the guide wheel 4 through a belt 5, the crankshaft 7 is installed in the crankcase 6, the crankshaft 7 is connected with the connecting rod 8, the connecting rod 8 is connected with the ejector rod 10 through a pin shaft 9, the ejector rod 10 and the plunger 11 are in hinged transmission, a piston 12 is installed in the plunger 11, a plunger high-pressure cavity 22 is isolated between the plunger 11 and the piston 12, the check valve 14, the digital display pressure sensor 15 and the overflow valve 16 are all communicated with the plunger high-pressure cavity 22, the pressure regulating knob 13 is connected with the check valve 14 through an oil pipe, the overflow valve 16 is connected with the oil tank 17 through an oil pipe, and the safety valve 21 is.

Preferably, a sensing receiving device is installed on the control box 2, and the sensing receiving device monitors the value of the digital display pressure sensor 15 in real time and transmits the data back to the control box 2. Data are transmitted between the sensing receiving device and the digital display pressure sensor 15 in a wired or wireless mode, and the control box 2 dynamically controls the variable frequency motor 3.

Preferably, an oil seal and a guide ring are installed between the plunger 11 and the piston 12. The high-pressure oil in the high-pressure cavity 22 of the plunger is ensured to be in a sealing state, and the guide ring enables the piston 12 to move in the plunger 11 in a track mode.

Preferably, the volume of the piston 12 is not more than half of the volume of the plunger 11.

Preferably, the maximum flow rate that the overflow valve 16 can pass in unit time is not less than the maximum flow rate that the check valve 14 can pass in unit time.

Example 2:

the technical scheme of the invention is adopted to further introduce the principle and the using method.

As shown in fig. 1-2, a method for using a double-control constant-pressure fluid delivery pump is used for construction in different construction working conditions by adopting the following processes:

the method comprises the following steps: checking device security

The reliability of the digital display pressure sensor 15 is checked, the safety of all valves is checked, and the running conditions of the control box 2 and the variable frequency motor 3 are checked; the check ensures the overall security of the device.

Step two: use of Normal State

Adjusting a pressure regulating knob 13 to enable high-pressure oil to enter a plunger high-pressure cavity 22, adjusting the pressure in the plunger high-pressure cavity 22 to be 1 MPa-5 MPa higher than a set value of a control box 2 according to a numerical value of a digital display pressure sensor 15, starting a variable frequency motor 3 through the control box 2, driving a belt pulley to move by the variable frequency motor 3 through a belt 5, driving a crankshaft 7 to rotate by the belt pulley, driving a connecting rod 8 to move by the crankshaft 7, enabling a mandril 10 to move in a guide sleeve by the connecting rod 8, driving a plunger 11 to move by the mandril 10, driving a piston 12 to move by the plunger 11, enabling slurry to enter from an inlet check valve 18 and flow out from an outlet check valve 19 through the movement;

step three: used from normal state to increased pressure state

When the working condition changes, the load outside the outlet check valve 19 is increased, high-pressure oil in the plunger high-pressure cavity 22 enters the oil tank 17 through the overflow valve 16, meanwhile, a sensing receiving device arranged on the control box 2 monitors that the numerical value of the digital display pressure sensor 15 exceeds the set value of the control box 2, and the control box 2 controls the variable frequency motor 3 to gradually reduce the running speed until the numerical value of the digital display pressure sensor 15 is less than or equal to the set value of the control box 2; traditional grouting pump only has a relief valve 21 to do not possess the function of dual fail-safe, when the condition that the external load grow appears, control box 2 forces inverter motor 3 to last the run-up, and when the pressurization lasts to increase and is greater than equipment set pressure, at this moment, relief valve 21 breaks to influence construction speed.

Step four: used when the pressure is increased to the normal state

When the working condition changes, the load outside the outlet one-way valve 19 is reduced, the pressure in the plunger high-pressure cavity 22 is displayed by the digital display pressure sensor 15, the sensing receiving device arranged on the control box 2 monitors that the numerical value of the digital display pressure sensor 15 is continuously reduced, and the control box 2 controls the variable frequency motor 3 to gradually increase the running speed until the maximum rotating speed of the variable frequency motor 3;

step five: use when constant pressure is out of control

When the pressure is increased from a normal state, at least one of the sensing receiving device and the digital display pressure sensor 15 breaks down, the plunger high-pressure cavity 22 loses the protection capability, at the moment, the control box 2 cannot effectively control the variable frequency motor 3 to effectively rotate downwards, the safety valve 21 is broken under high pressure, and the system is forced to unload.

Preferably, the maximum pressure in the plunger high pressure chamber 22 is less than the pressure at which the relief valve 21 ruptures.

Preferably, in the fourth step, when the sensing receiving device installed on the control box 2 monitors that the value of the digital display pressure sensor 15 continuously decreases, the pressure regulating knob 13 is adjusted to allow the high-pressure oil to enter the plunger high-pressure chamber 22 until the pressure in the plunger high-pressure chamber 22 reaches the initial set pressure in the plunger high-pressure chamber 22 in the second step.

According to the double-control constant-pressure fluid delivery pump and the use method thereof, the double-control structure is arranged, and the grouting equipment is protected doubly, so that the pressure building phenomenon in the grouting process cannot damage the equipment, and the construction speed cannot be influenced.

It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.