Multifunctional flow test bench

Abstract

The utility model relates to the technical field of valve detection, and discloses a multifunctional flow test bench which comprises a water tank, a liquid pump is installed on the outer wall of the water tank, a water storage tank is installed on the outer wall of the liquid pump, a connecting pipe is fixedly assembled on the outer wall of the water storage tank, an air compressor is installed on the outer side of the connecting pipe, and a water pump is installed on the outer side of the air compressor. A pipeline main valve is fixedly assembled in an inner cavity of the connecting pipe, and a testing pipeline is fixedly assembled on the outer wall of the connecting pipe. According to the multifunctional flow test bench, the liquid pump is installed on the outer side of the water tank, the liquid pump is a variable frequency pump, when the multifunctional flow test bench works, a frequency converter converts alternating current into an electric signal with adjustable frequency and amplitude, the electric signal is transmitted to the motor through a cable, and after the motor senses the signal, the rotating speed and torque of the motor are adjusted according to the change of the signal; therefore, the rotating speed and the flow of the pump are controlled, different pressures are used for repeatedly impacting the measured valve, and a better measurement result is obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of valve detection, in particular to a multifunctional flow test bench. Background Art

[0002] A valve is a device used to control the flow of fluid; a valve is usually composed of a valve body, a valve cover, a valve seat, a valve core and an operating device. When the valve is opened, the fluid can smoothly pass through the opening of the valve to achieve unobstructed passage, and when the valve is closed, a seal is formed between the valve body and the valve seat to prevent the passage of the fluid. During the production and manufacturing of valves, pressure testing of the valve's sealing performance is required.

[0003] When using traditional testing equipment, the valve to be tested is installed on the corresponding pipeline to form a passage in the pipeline, and water is supplied to the inner cavity of the pipeline, and a constant water flow pressure is output to the valve to be tested to test the sealing of the valve. However, when traditional equipment performs pressure testing on the valve, the pressure acting on the valve is constant and the water flow pressure cannot be adjusted, which leads to certain limitations in the test results and the inability to derive the tolerance range of the valve for normal use. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a multifunctional flow test bench, which has the advantages of being easy to use and having adjustable pressure, and solves the problems raised by the above-mentioned background technology.

[0005] The utility model provides the following technical scheme: a multifunctional flow test bench comprises a water tank, a liquid pump is installed on the outer wall of the water tank, a water storage tank is installed on the outer wall of the liquid pump, a connecting pipe is fixedly installed on the outer wall of the water storage tank, an air compressor is installed on the outer side of the connecting pipe, a pipeline main valve is fixedly installed on the inner cavity of the connecting pipe, a test pipeline is fixedly installed on the outer wall of the connecting pipe, a water inlet is opened on the outer wall of the test pipeline, a water outlet is opened on the outer wall of the test pipeline, a front sealing valve is installed on the inner cavity of the test pipeline, a rear sealing valve is fixedly installed on the inner cavity of the test pipeline, a valve to be tested is installed on the outer wall of the test pipeline, a front pressure gauge is fixedly installed on the outer wall of the test pipeline, a flow meter is fixedly installed on the outer wall of the test pipeline, a rear pressure gauge is fixedly installed on the outer wall of the test pipeline, and a reflux pipe is installed on the outer wall of the test pipeline.

[0006] As a preferred technical solution of the utility model: the water tank and the outer wall of the liquid pump are connected by a pipeline, the liquid pump is a variable frequency pump, and the inner cavity of the liquid pump is connected to the water storage tank by a pipeline.

[0007] As a preferred technical solution of the utility model: the inner cavity of the air compressor is communicated with the inner cavity of the connecting pipe, and the front sealing valve and the rear sealing valve are respectively installed at both ends of the outer wall of the test pipeline.

[0008] As a preferred technical solution of the utility model: the outer wall of the reflux pipe away from one end of the test pipeline is communicated with the inner cavity of the water tank, and the flow meter is installed on the outer wall of one end of the test pipeline close to the front sealing valve.

[0009] As a preferred technical solution of the utility model: the number of the test pipelines is three, and the three test pipelines are respectively and evenly installed on the outer wall of the connecting pipe.

[0010] As a preferred technical solution of the utility model: a swing check valve is installed on the outer wall of the liquid pump, and the valve to be tested and the outer wall of the test pipeline are connected via a flange.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. The multifunctional flow test bench is equipped with a liquid pump installed on the outside of the water tank, and the liquid pump is a variable frequency pump. When working, the frequency converter converts AC power into an electrical signal with adjustable frequency and adjustable amplitude, usually a three-phase variable frequency output, which is transmitted to the motor through a cable. After the motor senses the signal, it adjusts its own speed and torque according to the change of the signal, thereby controlling the speed and flow of the pump. Different frequencies and amplitudes can control the speed and flow of the pump, thereby achieving different water supply requirements, and using different pressures to repeatedly impact the valve under test, thereby obtaining better measurement results.

[0013] 2. The multifunctional flow test bench sets multiple test pipelines on the outer wall of the connecting pipe, installs different valves to be tested on different test pipelines, and closes the sealing valves on the test pipelines to allow fluid to pass through the inner cavities of different pipelines, thereby testing different valves to be tested, further improving the test efficiency of the valves and obtaining better test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the connecting pipe of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the water storage tank of the utility model;

[0017] Figure 4 This is a schematic diagram of the test pipeline structure of the utility model;

[0018] Figure 5This is a schematic diagram of the structure of the pipeline main valve of the utility model.

[0019] In the figure: 1. water tank; 2. liquid pump; 3. water storage tank; 4. pipeline main valve; 5. air compressor; 6. test pipeline; 7. water inlet; 8. water outlet; 9. front pressure gauge; 10. flow meter; 11. valve under test; 12. front sealing valve; 13. rear sealing valve; 14. rear pressure gauge; 15. connecting pipe; 16. return pipe. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1 - Figure 5 The multifunctional flow test bench comprises a water tank 1, a liquid pump 2 is installed on the outer wall of the water tank 1, a water storage tank 3 is installed on the outer wall of the liquid pump 2, a connecting pipe 15 is fixedly installed on the outer side of the connecting pipe 15, an air compressor 5 is installed on the outer side of the connecting pipe 15, a pipeline main valve 4 is fixedly installed in the inner cavity of the connecting pipe 15, a test pipeline 6 is fixedly installed on the outer wall of the connecting pipe 15, a water inlet 7 is opened on the outer wall of the test pipeline 6, a water outlet 8 is opened on the outer wall of the test pipeline 6, a front sealing valve 12 is installed in the inner cavity of the test pipeline 6, a rear sealing valve 13 is fixedly installed in the inner cavity of the test pipeline 6, a valve to be tested 11 is installed on the outer wall of the test pipeline 6, a front pressure gauge 9 is fixedly installed on the outer wall of the test pipeline 6, a flow meter 10 is fixedly installed on the outer wall of the test pipeline 6, a rear pressure gauge 14 is fixedly installed on the outer wall of the test pipeline 6, and a reflux pipe 16 is installed on the outer wall of the test pipeline 6.

[0022] By means of a liquid pump 2 arranged on the outer wall of the water tank 1 and a water storage tank 3 arranged on the outer wall of the liquid pump 2, water in the inner cavity of the water tank 1 can be pumped into the inner cavity of the water storage tank 3 under the action of the liquid pump 2, and the water is released into the inner cavity of the connecting pipe 15 through the water storage tank 3, and the water enters the test pipeline 6 through the inner cavity of the pipeline main valve 4, so that the valve 11 under test can be tested under the action of the water flow.

[0023] In a preferred embodiment: the water tank 1 and the outer wall of the liquid pump 2 are connected by a pipeline, the liquid pump 2 is a variable frequency pump, and the inner cavity of the liquid pump 2 is connected to the water storage tank 3 by a pipeline.

[0024] By setting a variable frequency pump on the outside of the water tank 1, the variable frequency pump adjusts the voltage and frequency of the motor through the frequency converter, thereby controlling the speed and flow of the pump to meet different flow and pressure requirements, so that the liquid pump 2 can adjust the pressure and flow rate of the water pumping, so that the equipment can better meet the tests under different pressures and flow rates.

[0025] In a preferred embodiment, the inner cavity of the air compressor 5 is communicated with the inner cavity of the connecting pipe 15 , and the front sealing valve 12 and the rear sealing valve 13 are respectively installed at two ends of the outer wall of the test pipeline 6 .

[0026] Through the setting of the connecting pipe 15, gas can be supplied into the inner cavity of the connecting pipe 15 under the action of the air compressor 5, so that there is a certain air pressure in the pipeline, and the inner cavity of the tested valve 11 is impacted under the action of the air pressure, so as to detect the sealing performance of the inner cavity of the tested valve 11.

[0027] In a preferred embodiment, the outer wall of the reflux pipe 16 away from the end of the test pipeline 6 is communicated with the inner cavity of the water tank 1 , and the flow meter 10 is installed on the outer wall of the end of the test pipeline 6 close to the front sealing valve 12 .

[0028] By installing a flow meter 10 and a front pressure gauge 9 on the outer wall of the test pipeline 6 near the front sealing valve 12, when the water flows from the inner cavity of the connecting pipe 15 into the inner cavity of the test pipeline 6 through the water inlet 7, the pressure of the water flow and the flow rate of the water in the inner cavity of the test pipeline 6 can be tested under the action of the flow meter 10 and the front pressure gauge 9, so as to control the water pressure and flow rate, so as to make it possible to change different pressures to better measure the valve 11 under test.

[0029] In a preferred embodiment, there are three test pipes 6 , and the three test pipes 6 are evenly installed on the outer wall of the connecting pipe 15 .

[0030] By installing multiple test pipelines 6 on the outer wall of the connecting pipe 15 and the tested valve 11 on the outer wall of the test pipeline 6, the water flow pressure can be controlled under the action of the liquid pump 2 and the pipeline main valve 4, as well as the front sealing valve 12 and the rear sealing valve 13, so that the tested valve 11 can be tested under different water pressures to observe whether the tested valve 11 can work normally, thereby better realizing the test of the tested valve 11.

[0031] In a preferred embodiment: a swing check valve is installed on the outer wall of the liquid pump 2, and the valve 11 to be tested and the outer wall of the test pipeline 6 are connected via a flange.

[0032] By installing a swing check valve on the outer wall of the liquid pump 2, the swing check valve can prevent the medium from flowing back and damaging the liquid pump 2, so that water can be better extracted under the action of the liquid pump 2. The valve 11 to be tested is fixed to the outer wall of the test pipeline 6 through a flange, and after the test of the valve 11 is completed, the valve 11 to be tested can be replaced to facilitate testing of different types of valves.

[0033] Working principle: During the use of the above equipment, when the device is used to test the valve 11 to be tested, water is supplied to the inner cavity of the water tank 1, and then the liquid pump 2 is started. Under the action of the liquid pump 2, the water in the inner cavity of the water tank 1 is pumped into the inner cavity of the water storage tank 3. At this time, the main valve 4 of the pipeline is opened, and the valves on the outer wall of the test pipeline 6 are opened. Only the gate valves at both ends of the corresponding test pipeline 6 are opened, and the gate valves of the other pipelines are closed. The water flows back to the return pipe 16 along the tested pipeline 6, and then flows back to the inner cavity of the water tank 1 to form a loop. The front pressure gauge 9 and flow meter 10 in front of the tested valve 11 It can accurately reflect the working condition pre-valve pressure and flow requirements of the tested valve 11. The rear pressure gauge 14 behind the tested valve 11 is on the dynamic flow test bench. The energy loss after the water flows through the tested valve 11 is tested. The tested valve 11 is tested under working conditions to determine whether the tested valve 11 meets the working conditions. When testing different tested valves 11, it is only necessary to open the valves at both ends of the corresponding test pipeline 6 and close the valves on the outer walls of other test pipelines 6 to detect the tested valve 11, thereby realizing the detection of the tested valve 11 under different water flow pressures.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multifunctional flow test bench, comprising a water tank (1), characterized in that: A liquid pump (2) is mounted on the outer wall of the water tank (1), a water storage tank (3) is mounted on the outer wall of the liquid pump (2), a connecting pipe (15) is fixedly mounted on the outer wall of the water storage tank (3), an air compressor (5) is mounted on the outer side of the connecting pipe (15), a pipeline main valve (4) is fixedly mounted in the inner cavity of the connecting pipe (15), a test pipeline (6) is fixedly mounted on the outer wall of the connecting pipe (15), a water inlet (7) is provided on the outer wall of the test pipeline (6), and a water outlet is provided on the outer wall of the test pipeline (6). (8), a front sealing valve (12) is installed in the inner cavity of the test pipeline (6), a rear sealing valve (13) is fixedly installed in the inner cavity of the test pipeline (6), a valve to be tested (11) is installed on the outer wall of the test pipeline (6), a front pressure gauge (9) is fixedly installed on the outer wall of the test pipeline (6), a flow meter (10) is fixedly installed on the outer wall of the test pipeline (6), a rear pressure gauge (14) is fixedly installed on the outer wall of the test pipeline (6), and a return pipe (16) is installed on the outer wall of the test pipeline (6).

2. The multifunctional flow test bench according to claim 1 is characterized in that: The water tank (1) and the outer wall of the liquid pump (2) are connected via a pipeline; the liquid pump (2) is a variable frequency pump; and the inner cavity of the liquid pump (2) and the water storage tank (3) are connected via a pipeline.

3. The multifunctional flow test bench according to claim 1 is characterized in that: The inner cavity of the air compressor (5) is in communication with the inner cavity of the connecting pipe (15), and the front sealing valve (12) and the rear sealing valve (13) are respectively installed at two ends of the outer wall of the test pipeline (6).

4. The multifunctional flow test bench according to claim 1 is characterized in that: The outer wall of the return pipe (16) at one end away from the test pipeline (6) is in communication with the inner cavity of the water tank (1), and the flow meter (10) is installed on the outer wall of one end of the test pipeline (6) close to the front sealing valve (12).

5. The multifunctional flow test bench according to claim 1 is characterized in that: The number of the test pipelines (6) is three, and the three test pipelines (6) are evenly installed on the outer wall of the connecting pipe (15).

6. The multifunctional flow test bench according to claim 1 is characterized in that: A swing check valve is installed on the outer wall of the liquid pump (2), and the valve to be tested (11) and the outer wall of the test pipeline (6) are connected via a flange.

Images