阅读说明：本技术 非满管流量计生产测试装置及方法 (Production testing device and method for non-full pipe flowmeter ) 是由 蒋小春 于 2020-05-18 设计创作，主要内容包括：本发明公开了非满管流量计生产测试装置及方法,包括水平设置的测量通道,所述测量通道的一端连接有供水装置,所述测量通道的另一端连接有测量装置,所述测量装置包括液体体积测量装置和液体重量测量装置。供水装置用于提供测试过程中的水,并保证水压的恒定；测量通道水平设置,保证水流的平稳,防止出现水流波动和波浪产生,导致测量不准确,测试失败的问题。测量装置可以采用体积测量也可以采用重量进行测量,体积测量便于测量员直接读数,重量进行测量便于实现自动化输出结果。(The invention discloses a production testing device and method for a non-full pipe flowmeter. The water supply device is used for supplying water in the test process and ensuring the water pressure to be constant; the measuring channel is horizontally arranged, so that the stability of water flow is guaranteed, and the problems of inaccurate measurement and test failure caused by water flow fluctuation and wave generation are prevented. The measuring device can adopt volume measurement and weight measurement, the volume measurement is convenient for direct reading of a measurer, and the weight measurement is convenient for realizing automatic output results.)

1. Non-full pipe flowmeter production testing arrangement, its characterized in that: the measuring channel comprises a horizontally arranged measuring channel, one end of the measuring channel is connected with a water supply device, the other end of the measuring channel is connected with a measuring device, and the measuring device comprises a liquid volume measuring device and a liquid weight measuring device.

2. The non-full pipe flowmeter production test device of claim 1, wherein: a non-full pipe flowmeter (4) is arranged in the middle of the measuring channel, and the front end of the non-full pipe flowmeter (4) is connected with a flowmeter standard meter (3); the rear end of the non-full pipe flowmeter (4) is connected with a flowmeter outlet measuring pipeline (5), and the rear end of the flowmeter outlet measuring pipeline (5) is connected with a drain pipe (10) through a Y-pipe.

3. The non-full pipe flowmeter production test device of claim 2, wherein: the rear end of the flow meter outlet measuring pipeline (5) is connected with a second electric valve (6) through a Y-shaped pipe, and the water outlet end of the second electric valve (6) is communicated with the measuring device through a pipeline.

4. The non-full pipe flowmeter production test device of claim 3, wherein: the front end of the flowmeter standard meter (3) is connected with a first electric valve (2), and the front end of the first electric valve (2) is connected with a water supply device.

5. The non-full pipe flowmeter production test device of claim 4, wherein: the water supply device comprises a water suction pump (1), the input end of the water suction pump (1) is connected with a water source through a pipeline, the output end of the water suction pump (1) is communicated with a first electric valve (2), and the height of the water suction pump (1) is lower than a measurement channel.

6. The non-full pipe flowmeter production test device of claim 5, wherein: the water outlet of the water discharge pipe (10) is higher than the measuring channel in horizontal height; the length of the outlet measuring pipeline (5) of the flowmeter is more than or equal to 10 times of the diameter of the pipeline of the non-full pipe flowmeter (4).

7. The non-full pipe flowmeter production test device of claim 6, wherein: the measuring device comprises an electronic platform scale (8), a measuring barrel (7) is arranged on the electronic platform scale (8), and the measuring barrel (7) is communicated with the water outlet end of the second electric valve (6).

8. The non-full pipe flowmeter production test device of claim 7, wherein: the water pump type flowmeter is characterized by comprising a control center (9), wherein the water pump (1), the first electric valve (2), the flowmeter standard meter (3), the non-full pipe flowmeter (4), the second electric valve (6) and the electronic platform scale (8) are in signal connection with the control center (9) through cables.

9. The method of claim 8, comprising the steps of:

1. firstly, calibrating the empty pipe parameters of the flowmeter under the condition of drying the pipeline;

2. under the condition of water passing, opening the first electric valve (2), immediately closing the water suction pump (1) and the first electric valve (2) when water enters the measuring cylinder (7), filling the whole pipeline of the non-full pipe flowmeter (4) with water, and carrying out zero calibration under the condition that the water is static;

3. the full scale calibration of the non-full pipe flowmeter (4) when the full pipe is measured; after the reading of the electronic platform scale (8) is reset to zero, opening the first electric valve (2), starting the water suction pump (1), adjusting the first electric valve (2) to enable the flow to reach the full value of the non-full pipe flowmeter (4), finally draining the liquid passing through the non-full pipe flowmeter (4) into the measuring cylinder (7) through the drain pipe (10), reading the numerical value M of the electronic platform scale (8), and calculating the accumulated flow value displayed by the non-full pipe flowmeter (4) and the liquid weight passing through the non-full pipe flowmeter (4) within a set time;

4. and (4) calibrating the flow of the non-full pipe flow meter (4) when the non-full pipe is measured.

10. The method of claim 9, wherein step 4 comprises the steps of:

a. the non-full pipe flowmeter (4) carries out a water-passing test, a second electric valve (6) is opened, and water flow in the whole test process directly enters the measuring cylinder (7);

b. different pipeline resistances are simulated by adjusting the rear second electric valve (6), the liquid level area of the liquid accounts for 10%, 30%, 50%, 80% and 100% of the full pipe proportion by the first electric valve (2), and the liquid flow rate is required to be 10% -100%, preferably 50% of the flow rate corresponding to the nominal full degree of the non-full pipe flowmeter (4) in the measurement process;

c. recording the flow value q of the non-full pipe flowmeter (4), and weighing a measuring cylinder (7) M by using a platform scale, wherein the density of water is c;

d. and (3) calculating calibration coefficients of the non-full pipe flowmeter (4) in different states by using the values of v-M/c, c-1 and M-v and q-v/t.

Technical Field

The invention relates to the field of flowmeter detection, in particular to a production testing device and method for a non-full pipe flowmeter.

Background

An electromagnetic flowmeter belongs to a kind of fast flowmeter, and is an instrument for measuring the flow of conductive fluid by an electromagnetic induction method. The principle is that a magnetic field is placed in the direction perpendicular to the flowing phase of the fluid, when the conductive fluid passes through, the fluid cuts magnetic lines of force to generate an induced potential, and the induced potential is led out by two electrodes. When the magnetic field intensity is unchanged and the diameter of the pipeline is constant, the magnitude of the induced potential is only related to the flow velocity of the fluid, and the flow value can be determined by converting the induced signal into the flow velocity. Its advantages are no moving parts in measuring pipeline or parts projected from pipeline, and less pressure loss. The volume flow measured by the electromagnetic flowmeter is not obviously influenced by the density, viscosity, temperature and pressure change of the fluid, and can be applied to the measurement of corrosive fluid, so that the electromagnetic flowmeter is widely applied to industrial production.

Most of the electromagnetic flow meters on the market at present can only be used for flow measurement of a full pipe, and for a fluid unfilled pipe or a fluid conversion process between the full pipe and a non-full pipe, because the cross-sectional area of the fluid in the pipe is no longer the cross-sectional area of the measuring pipe, the result obtained by using the traditional flow meter is not accurate, the flow meter detection method of the non-full pipe needs to consider two parameters, namely the average flow rate and the liquid level height of the fluid in the measuring pipe, and then calibrate the flow meter.

Disclosure of Invention

The invention aims to: aiming at the existing problems, the production testing device and method for the non-full-pipe flowmeter are provided, the calibration of the non-full-pipe flowmeter can be realized through the testing and the detection of the non-full-pipe flowmeter, whether the non-full-pipe flowmeter is qualified or not can be detected, and the product delivery quality is ensured.

The technical scheme adopted by the invention is as follows:

non-full pipe flowmeter production testing arrangement, including the measuring channel of level setting, the one end of measuring channel is connected with water supply installation, the other end of measuring channel is connected with measuring device, measuring device includes liquid volume measuring device and liquid weight measuring device. The water supply device is used for supplying water in the test process and ensuring the water pressure to be constant; the measuring channel is horizontally arranged, so that the stability of water flow is guaranteed, and the problems of inaccurate measurement and test failure caused by water flow fluctuation and wave generation are prevented. The measuring device can adopt volume measurement and weight measurement, the volume measurement is convenient for direct reading of a measurer, and the weight measurement is convenient for realizing automatic output results.

Further, the invention discloses a preferable structure of the production testing device of the non-full pipe flowmeter, wherein the middle part of the measuring channel is provided with the non-full pipe flowmeter, and the front end of the non-full pipe flowmeter is connected with a flowmeter standard meter; the rear end of the non-full pipe flowmeter is connected with a flowmeter outlet measuring pipeline, and the rear end of the flowmeter outlet measuring pipeline is connected with a drain pipe through a Y-pipe. The flowmeter standard table is used for measuring standard data thereof. The drain is used for calibration when a full pipe is detected.

Furthermore, the rear end of the outlet measuring pipeline of the flowmeter is connected with a second electric valve through a Y-shaped pipe, and the water outlet end of the second electric valve is communicated with the measuring device through a pipeline.

Furthermore, the front end of the flowmeter standard meter is connected with a first electric valve, and the front end of the first electric valve is connected with a water supply device.

Further, water supply installation includes the suction pump, the input of suction pump passes through the pipeline and links to each other with the water source, the output and the first electric valve of suction pump are linked together, the height of suction pump is less than the measurement channel.

Further, the water outlet of the water discharge pipe is higher than the measuring channel in level; the length of the outlet measuring pipeline of the flowmeter is more than or equal to 10 times of the diameter of the non-full pipe flowmeter pipeline. The length of the pipeline is measured by lengthening the outlet of the flowmeter, so that the stability of water flow is guaranteed, and the test accuracy is guaranteed.

Furthermore, the measuring device comprises an electronic platform scale, a measuring barrel is arranged on the electronic platform scale, and the measuring barrel is communicated with the water outlet end of the second electric valve.

And the water pump, the first electric valve, the flowmeter standard meter, the non-full pipe flowmeter, the second electric valve and the electronic platform scale are in signal connection with the control center through cables. The control center is used for controlling the operation of the water suction pump, the first electric valve and the second electric valve and receiving data collected by the flowmeter standard meter, the non-full pipe flowmeter and the electronic platform scale.

The test method based on the non-full pipe flowmeter production test device comprises the following steps:

1. firstly, calibrating the empty pipe parameters of the flowmeter under the condition of drying the pipeline;

2. under the condition of water flowing, a first electric valve is opened, when water enters a measuring cylinder, a water suction pump and the first electric valve are immediately closed, the whole pipeline of the non-full-pipe flowmeter is filled with water, and zero calibration is carried out under the condition that the water is static;

3. the full scale calibration of a non-full pipe flowmeter is carried out when the full pipe is measured; after the reading of the electronic platform scale is reset to zero, a first electric valve is opened, a water suction pump is started, the first electric valve is adjusted to enable the flow to reach the full value of the non-full pipe flowmeter, liquid passing through the non-full pipe flowmeter is finally drained into a measuring cylinder through a drain pipe, the numerical value M of the electronic platform scale is read, and the accumulated flow value displayed by the non-full pipe flowmeter and the non-full pipe flowmeter within the set time is calculated;

4. and measuring the flow calibration of the non-full pipe flow meter when the pipe is not full.

Further, the invention discloses a preferable implementation step of the test method based on the production test device of the non-full pipe flowmeter, and the step 4 comprises the following steps:

a. the non-full pipe flowmeter performs a water-flowing test, the second electric valve is opened, and water flow in the whole test process directly enters the measuring cylinder;

b. different pipeline resistances are simulated by adjusting the rear second electric valve, the liquid level area of the liquid accounts for 10%, 30%, 50%, 80% and 100% of the full pipe proportion through the first electric valve, and the liquid flow rate is required to be 10% -100%, preferably 50% of the flow rate corresponding to the full degree of the non-full pipe flowmeter in the measurement process;

c. recording the flow value q of the non-full pipe flowmeter, and weighing and measuring the cylinder M by using a platform scale, wherein the density of water is c;

d. and (3) calculating the calibration coefficients of the non-full pipe flowmeter in different states by using the values of v-M/c, c-1 and q-v/t.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. by the device, the flowmeter with the non-full pipe can be tested, the accuracy and the reliability of the measurement can be detected, and the flowmeter with the non-full pipe can be calibrated;

2. through setting up the detection device of the flowmeter of dedicated non-full pipe, can improve the detection efficiency of the flowmeter of non-full pipe greatly, improve and detect automatic level.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic diagram of the detection structure of the present invention in full pipe detection;

FIG. 3 is a schematic diagram of the detection structure of the present invention during non-full pipe detection;

the labels in the figure are: the water pump is 1, the first electric valve is 2, the flowmeter standard meter is 3, the non-full-pipe flowmeter is 4, the flowmeter outlet measuring pipeline is 5, the second electric valve is 6, the measuring cylinder is 7, the electronic platform scale is 8, the control center is 9, and the drain pipe is 10.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.