Valve testing system

Abstract

The utility model relates to the technical field of valve testing, in particular to a valve testing system. The valve test system comprises a stored water supply back-discharge normal pressure water tank, a flow supply pressurization module, a driving module, a product test module, a flow acquisition module and a measurement and control device. The stored water supply back-discharge normal-pressure water tank, the flow supply pressurization module, the product test module and the flow acquisition module are connected in sequence to form a closed-loop test loop; a water replenishing end is arranged on the stored water supply back-discharge normal-pressure water tank; the flow supply pressurization module comprises a flow supply pressurization pipeline and a variable frequency pump arranged on the flow supply pressurization pipeline, the input end of the flow supply pressurization pipeline is connected with the stored water supply back-discharge normal-pressure water tank, and the output end of the flow supply pressurization pipeline is connected with the product test module; the product testing module comprises a product testing pipeline and a testing station which can be connected with a valve to be tested. According to the technical scheme, the test medium can be supplemented at any time, the test is simple and convenient, and the test efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of valve testing technology, and in particular to a valve testing system. Background Technology

[0002] In existing liquid valve testing processes, liquid supply systems often use pressure vessels as medium storage containers, supplying the medium through gas compression. These pressure vessels undergo mandatory pressure vessel inspections before leaving the factory and require periodic pressure vessel testing. Furthermore, because the medium is supplied through gas compression, the storage container is pressurized during operation, preventing the continuous addition of liquid. Liquid addition requires purging the container of gas before adding liquid, and repressurization is necessary after adding liquid before supplying the medium to the pipeline. This cumbersome process disrupts the continuous liquid supply, reducing testing efficiency. Utility Model Content

[0003] To solve the above-mentioned technical problems, or at least partially solve them, this utility model provides a valve testing system that can replenish the test medium at any time, and the testing is simple and convenient, which helps to improve testing efficiency.

[0004] This utility model provides a valve testing system, including:

[0005] The system includes a water supply and return atmospheric pressure tank, a flow supply booster module, a drive module, a product testing module, a flow acquisition module, and a measurement and control device; the water supply and return atmospheric pressure tank, the flow supply booster module, the product testing module, and the flow acquisition module are sequentially connected to form a closed-loop test circuit;

[0006] The water supply return atmospheric pressure water tank is equipped with a water replenishment end; the flow supply boosting module includes a flow supply boosting pipeline and a variable frequency pump installed on the flow supply boosting pipeline. The input end of the flow supply boosting pipeline is connected to the water supply return atmospheric pressure water tank, and the output end of the flow supply boosting pipeline is connected to the product testing module.

[0007] The product testing module includes a product testing pipeline and a testing station set in the product testing pipeline, the testing station being used to connect the valve to be tested;

[0008] The flow acquisition module includes a flow acquisition pipe and a flow meter installed on the flow acquisition pipe. The input end of the flow acquisition pipe is connected to the product test pipe, and the output end of the flow acquisition pipe is connected to the water storage supply return atmospheric pressure water tank.

[0009] The output end of the drive module is connected to the opening end of the valve to be tested; the measurement and control equipment includes a PLC control unit and a host computer that is communicatively connected to the PLC control unit; the PLC control unit is communicatively connected to the frequency converter pump.

[0010] In some embodiments, the bottom end of the water storage supply and return atmospheric pressure water tank is provided with a water outlet;

[0011] A manual valve and a filter are installed on the pipeline between the outlet of the water supply return atmospheric pressure tank and the flow supply booster module; the manual valve is located between the filter and the water supply return atmospheric pressure tank.

[0012] In some embodiments, a return water end is provided at the top of the water supply return atmospheric pressure tank, and a back pressure regulating valve and a filter are provided on the pipeline between the return water end and the flow acquisition module; the filter is located between the back pressure regulating valve and the water supply return atmospheric pressure tank.

[0013] In some embodiments, a level gauge is provided on the water supply return atmospheric pressure water tank, and the level gauge is communicatively connected to the PLC control unit.

[0014] In some embodiments, the flow supply booster pipe and the product test pipe are configured in a one-to-one correspondence.

[0015] In some embodiments, the flow supply booster pipeline includes a first flow supply booster pipeline and a second flow supply booster pipeline; the product testing pipeline includes a first product testing pipeline and a second product testing pipeline;

[0016] The valve testing system also includes a connecting pipe, the first end of which is located between the first flow supply pressurization pipe and the first product testing pipe, and the second end of which is located between the second flow supply pressurization pipe and the second product testing pipe;

[0017] The connecting pipe is equipped with an electric valve, which is communicatively connected to the PLC control unit.

[0018] In some embodiments, each of the product test pipelines is connected to the water supply return atmospheric pressure tank via multiple flow acquisition pipelines; wherein the multiple flow acquisition pipelines are arranged in parallel.

[0019] In some embodiments, the drive module includes an air supply pipe and an air source, wherein the input end of the air supply pipe is connected to the air source, and the output end of the air supply pipe is connected to the opening end of the valve to be tested.

[0020] The gas supply pipeline is equipped with a pressure reducing valve, a safety valve, and a shut-off valve.

[0021] In some embodiments, the gas supply pipeline includes multiple output ends, and each output end is configured to correspond one-to-one with the product test pipeline.

[0022] In some embodiments, the drive module further includes a venting pipe, one end of which is connected to the gas supply pipe;

[0023] The other end of the venting pipe is connected to the recovery source, and a shut-off valve is installed on the venting pipe.

[0024] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0025] The valve testing system provided in this embodiment allows for easy and convenient replenishment of the medium during product testing via a water supply and return atmospheric pressure tank (a conventional water tank, not a pressure vessel). Combined with a variable frequency pump, the monitoring and control equipment uses a PLC control unit to control the pump flow rate according to a set flow rate, thus adjusting the water supply flow and pressure. Furthermore, by incorporating a medium water circulation structure, the medium water output from the water supply and return atmospheric pressure tank can be returned to the tank after testing, allowing for recycling and contributing to water conservation. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A schematic diagram of the structure of a valve testing system provided in an embodiment of this utility model;

[0029] Figure 2 A control circuit diagram provided for an embodiment of this utility model;

[0030] Figure 3 This is a schematic diagram of another valve testing system provided in an embodiment of the present invention.

[0031] The components include: 10. Water supply and return atmospheric pressure water tank; 11. Flow supply booster module; 12. Drive module; 121. Gas supply pipeline; 122. Gas venting pipeline; 13. Flow acquisition module; 14. Flow supply booster pipeline; 15. Product testing pipeline; 16. Flow acquisition pipeline; 17. Testing station; 18. Host computer; 19. Coil; 20. Measurement and control equipment; 21. Product testing module; 22. PLC control unit; 23. Connecting pipeline; 24. Variable frequency pump; 25. Pressure sensor; 26. Differential pressure gauge; 27. Flow meter; R: Resistance; V: Voltmeter; 28. Manual valve; 29. ​​Filter; 30. Back pressure regulating valve; 31. Level gauge; 32. Electric ball valve; 33. Safety valve; 34. Shut-off valve; 35. Gas source; 36. Recovery source; 37. Pressure reducing valve. Detailed Implementation

[0032] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0033] Many specific details are set forth in the following description in order to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present invention, and not all embodiments.

[0034] The valve testing system provided in this embodiment utilizes a water supply and return atmospheric pressure tank during product testing. This tank is a conventional water tank, not a pressure vessel, allowing for the replenishment of media at any time, making it simple and convenient. Combined with a variable frequency pump, the monitoring and control equipment uses a PLC control unit to control the pump flow rate according to a set flow rate, thus adjusting the water supply flow and pressure. Furthermore, this embodiment establishes a media water circulation structure by sequentially connecting the water supply and return atmospheric pressure tank, the flow supply booster module, the product testing module, and the flow acquisition module. After testing, the media water output from the water supply and return atmospheric pressure tank can be returned to it, allowing for water recycling and saving water resources. This solves the problems of media waste, discontinuous testing processes, and low operating efficiency in traditional testing systems.

[0035] The valve testing system provided in the embodiments of this utility model will be described exemplarily below with reference to the accompanying drawings.

[0036] Figure 1 This is a schematic diagram of a valve testing system provided in an embodiment of the present invention. Figure 1As shown, the valve testing system includes: a water supply and return atmospheric pressure water tank 10, a flow supply booster module 11, a drive module 12, a product testing module 21, a flow acquisition module 13, and a measurement and control device 20; the water supply and return atmospheric pressure water tank 10, the flow supply booster module 11, the product testing module 21, and the flow acquisition module 13 are connected in sequence to form a closed-loop test circuit.

[0037] The water supply return atmospheric pressure water tank 10 is equipped with a water replenishment end A1; the flow supply boosting module 11 includes a flow supply boosting pipe 14 and a variable frequency pump 24 installed on the flow supply boosting pipe 14. The input end of the flow supply boosting pipe 14 is connected to the water supply return atmospheric pressure water tank 10, and the output end of the flow supply boosting pipe 14 is connected to the product testing module 21.

[0038] Product testing module 21 includes product testing pipeline 15 and testing station 17 set in product testing pipeline 15. Testing station 17 is used to connect valve 171 to be tested. Product testing pipeline 15 includes an input pipeline and an output pipeline connected to testing station 17. A pressure sensor 25 is installed on the input pipeline. Product testing module 21 is also equipped with differential pressure gauge 26. The first end of differential pressure gauge 26 is connected to the input pipeline between pressure sensor 25 and testing station 17, and the second end of differential pressure gauge 26 is connected to the output pipeline.

[0039] The flow acquisition module 13 includes a flow acquisition pipe 16 and a flow meter 27 installed on the flow acquisition pipe 16. The input end of the flow acquisition pipe 16 is connected to the product test pipe 15, and the output end of the flow acquisition pipe 16 is connected to the water storage supply return atmospheric pressure water tank 10.

[0040] The output terminal B of the drive module 12 is connected to the opening terminal of the valve 171 under test; the measurement and control equipment 20 includes a PLC control unit 22 and a host computer 18 that is communicatively connected to the PLC control unit 22. The valve 171 under test includes a coil 19 with a resistor R connected in series thereon, and a voltmeter V is installed across the resistor R; the PLC control unit 22 is electrically connected to the coil 19 and the resistor R respectively; the PLC control unit 22 is also communicatively connected to the frequency converter pump 24, the pressure sensor 25, the differential pressure gauge 26, the flow meter 27, and the voltmeter V.

[0041] The atmospheric pressure water tank 10 for water supply and return is used to store the medium water. The atmospheric pressure water tank 10 can be a conventional non-pressurized square water tank. When installing the atmospheric pressure water tank 10, it is considered that the variable frequency pump 24 needs the medium water to flow in automatically. Therefore, the atmospheric pressure water tank 10 is set at a certain height, and the height difference is used to realize the automatic supply of medium water to the inlet of the variable frequency pump 24.

[0042] The system includes a water storage and return atmospheric pressure water tank 10, which stores, supplies, and recovers medium water during testing; a flow supply booster module 11, equipped with a variable frequency pump 24, provides medium water with stable flow and pressure to the product testing module 21; a test station 17 is provided on the product testing module 21 for installing the valve 171 to be tested; a pressure sensor 25 and a differential pressure gauge 26 are provided on the product testing module 21; the pressure sensor 25 is installed upstream of the valve 171 to monitor the inlet pressure of the valve 171; and the differential pressure gauge 26 is used to measure the flow resistance of the valve 171, providing accurate flow resistance measurement with lower error and greater reliability compared to using the pressure sensor 25 to measure pressure; a flow acquisition module 13 is equipped with a flow meter 27 to measure the medium flow rate in the flow acquisition pipeline 16; and a drive module 12 is a low-pressure gas supply module used to provide driving gas to the valve 171 to be tested.

[0043] Specifically, before testing the valve 171 (test product), medium water can be injected into the atmospheric pressure water tank 10 to meet the testing requirements. For example, as shown... Figure 1 As shown, the measurement and control equipment 20 can obtain the water level signal of the water supply return atmospheric pressure water tank 10, and then make a judgment. It can automatically control the electric ball valve 32 on the water supply pipeline connected to the water supply end A1 to open and add medium water to the water supply return atmospheric pressure water tank 10, so as to ensure that the amount of medium water in the water supply return atmospheric pressure water tank 10 meets the test requirements.

[0044] During the test, when the medium water in the storage water supply return atmospheric pressure water tank 10 passes through the flow supply booster module 11, the PLC control unit 22 sends a control adjustment signal to the variable frequency pump 24 based on the actual flow rate collected and the set target flow rate. Then, the variable frequency pump 24 outputs a stable pressure to adjust the amount of water flowing into the flow measurement and acquisition pipeline 16. This allows the flow supply booster module 11 to output the target flow rate to the product test module 21 according to the user's required flow rate. The medium water flows through the valve 171 under test and the corresponding flow meter 27 at a certain flow rate and pressure.

[0045] Additionally, the PLC control unit 22 outputs a 24VDC signal to the coil 19 of the valve under test 171, and simultaneously, in conjunction with the drive module 12, provides driving air to the valve under test 171, thereby ensuring that the valve under test 171 is in the open state. For example, Figure 2 This is a control circuit diagram provided for an embodiment of the present utility model. (See diagram below.) Figure 2As shown, the PLC control unit 22 outputs a 24VDC signal to the coil 19 of the valve 171 under test. A resistor R is connected in series with the coil 19, and a voltmeter V is installed across the resistor R. In some embodiments, a relay can also be used, and the PLC control unit 22 outputs a 24VDC signal to the coil 19 through the relay.

[0046] Specifically, when the valve to be tested 171 is opened, the PLC control unit 22 can collect data from the pressure sensor 25 and differential pressure gauge 26 on the product test pipeline 15, as well as data detected by the flow meter 27 and voltmeter V (electrical performance of the valve to be tested). The above data can be transmitted to the host computer 18, which analyzes and processes the data to obtain parameters of the flow resistance, flow stability and switching performance of the valve to be tested, thereby realizing the performance test of the valve to be tested.

[0047] Therefore, the valve testing system provided in this embodiment of the present invention, during product testing, uses a conventional water tank (not a pressure vessel) combined with a variable frequency pump 24. The measurement and control equipment 20 controls the output pressure of the variable frequency pump 24 according to the set flow rate via a PLC control unit 22, thereby achieving adjustment of the water supply flow rate and pressure. During the testing process, the medium can be replenished to the water supply return atmospheric pressure tank 10 at any time, which is simple and convenient. In addition, by setting up a medium water circulation structure, the medium water output from the water supply return atmospheric pressure tank 10 can be returned to the water supply return atmospheric pressure tank 10 after the test is completed, allowing for recycling and helping to save water resources. Compared to related technologies, the valve testing system provided in this utility model embodiment uses a conventional water tank (non-pressure vessel) for water supply and return during product testing. This allows for easy replenishment of the medium. Combined with a variable frequency pump 24, the testing and control equipment 20 controls the output pressure of the variable frequency pump 24 according to the set flow rate via a PLC control unit 22, thereby adjusting the water supply flow rate and pressure to complete the performance testing of the valve under test.

[0048] It should be noted that the computer program used to control the output pressure of the variable frequency pump 24 via the PLC control unit 22 is a known existing method, and will not be described in detail here.

[0049] In some embodiments, such as Figure 1 As shown, the bottom end of the atmospheric pressure water tank 10 for water supply and return is provided with a water outlet A2;

[0050] A manual valve 28 and a filter 29 are installed on the pipeline between the outlet A2 of the water supply return atmospheric pressure water tank 10 and the flow supply booster module 11; the manual valve 28 is located between the filter 29 and the water supply return atmospheric pressure water tank 10.

[0051] Specifically, a manual valve 28 is provided to control whether the fluid flow between the water supply return atmospheric pressure tank 10 and the flow supply booster module 11 is open. Additionally, a filter 29 is provided to remove impurities from the water supply return atmospheric pressure tank 10 when it supplies medium water to the flow supply booster module 11, thus preventing impurities from affecting product testing during testing.

[0052] In some embodiments, such as Figure 1 As shown, the top of the water supply return atmospheric pressure water tank 10 is provided with a return water end A3. A back pressure regulating valve 30 and a filter 29 are provided on the pipeline between the return water end A3 and the flow acquisition module 13. The filter 29 is located between the back pressure regulating valve 30 and the water supply return atmospheric pressure water tank 10.

[0053] Specifically, by setting up a back pressure regulating valve 30 and a filter 29, when the medium water output by the flow acquisition module 13 is recycled back to the storage water supply return atmospheric pressure water tank 10 through the return water end A3 of the storage water supply return atmospheric pressure water tank 10, the back pressure regulating valve 30 is used to facilitate the recycling of the medium water output by the flow acquisition module 13, and the filter 29 is set up to filter impurities in the medium water.

[0054] Among them, the back pressure regulating valve 30 is a manual regulating valve. The back pressure regulating valve 30 can balance the pressure fluctuations in the pipeline and avoid equipment failure, unstable flow, and other problems caused by excessively low, high, or fluctuating pressure.

[0055] In some embodiments, such as Figure 1 As shown, a level gauge 31 is installed on the atmospheric pressure water tank 10 for water supply and return, and the level gauge 31 is communicatively connected to the PLC control unit 22.

[0056] The level gauge 31 is used to monitor the remaining water volume in the atmospheric pressure water tank 10 for water supply and return. For example, a magnetic float level gauge is selected, allowing the user to visually observe the water level in the tank. A 4-20mA signal transmission is also provided to link the level gauge 31 with the electric ball valve 32 installed on the water supply pipe connected to the water supply end A1. When the water level is below 0.5m, the electric ball valve 32 on the water supply pipe automatically opens to supply water; when the water level is above 1.95m, the electric ball valve 32 automatically closes to stop water supply. It should be noted that the user can also manually control the water supply volume.

[0057] In some implementations, such as Figure 1 As shown, a filter 29 is also installed on the water supply pipe connected to the water supply end A1. When water is supplied to the atmospheric pressure water tank 10, impurities in the medium water can be filtered.

[0058] In some implementations, such as Figure 1 As shown, the bottom of the water supply and return atmospheric pressure water tank 10 is also provided with a drain end A4, and a drain pipe is connected to the drain end A4. An electric ball valve 32 is provided on the drain pipe. The electric ball valve 32 is communicatively connected to the PLC control unit 22 and is used to control the flow of the drain pipe so as to replace and discharge the medium water in the water supply and return atmospheric pressure water tank 10.

[0059] In some embodiments, such as Figure 1 As shown, the flow supply booster pipe 14 and the product test pipe 15 are set up in a one-to-one correspondence.

[0060] Specifically, this embodiment of the invention may include one flow supply pressurization pipe 14 and one product testing pipe 15; this embodiment may also include multiple flow supply pressurization pipes 14 and multiple product testing pipes 15. The number of multiple flow supply pressurization pipes 14 and multiple product testing pipes 15 is the same to ensure a one-to-one correspondence between the flow supply pressurization pipes 14 and the product testing pipes 15. Figure 1 The example shows two flow supply booster pipes 14 and two product test pipes 15.

[0061] In some embodiments, Figure 3 This is a schematic diagram of another valve testing system provided in an embodiment of the present invention. Figure 3 As shown, the flow supply booster pipeline 14 includes a first flow supply booster pipeline 141 and a second flow supply booster pipeline 142; the product testing pipeline 15 includes a first product testing pipeline 151 and a second product testing pipeline 152; the valve testing system also includes a connecting pipeline 23, the first end of which is located between the first flow supply booster pipeline 141 and the first product testing pipeline 151, and the second end of which is located between the second flow supply booster pipeline 142 and the second product testing pipeline 152; an electric ball valve 32 is installed on the connecting pipeline 23, and the electric ball valve 32 is communicatively connected to the PLC control unit 22.

[0062] thus, Figure 1 The valve testing system shown can be set up with two test stations 17, which can be used to test the two valves 171 installed on the test station 17 respectively.

[0063] Specifically, the medium water output from the water supply return atmospheric pressure water tank 10 can flow sequentially through the first flow supply booster pipe 141 and the first product test pipe 151 to the flow acquisition pipe 16, and then flow back to the water supply return atmospheric pressure water tank 10; and the medium water output from the water supply return atmospheric pressure water tank 10 can also flow sequentially through the second flow supply booster pipe 142 and the second product test pipe 152 flow acquisition pipe 16, and then flow back to the water supply return atmospheric pressure water tank 10.

[0064] Specifically, by setting up a connecting pipe 23 and an electric ball valve 32 on the connecting pipe 23, different water pressure combinations can be achieved when the electric ball valve 32 on the connecting pipe 23 is opened.

[0065] In some embodiments, such as Figure 1 As shown, each product test pipeline 15 is connected to the water supply return atmospheric pressure water tank 10 through multiple flow acquisition pipelines 16; wherein, the multiple flow acquisition pipelines 16 are arranged in parallel.

[0066] For example, such as Figure 1 As shown, the first product test pipeline 151 is connected to the atmospheric pressure water tank 10 for water supply and return via two flow acquisition pipelines 16 (the first flow acquisition pipeline 161 and the second flow acquisition pipeline 162, respectively), with the first flow acquisition pipeline 161 and the second flow acquisition pipeline 162 connected in parallel. The second product test pipeline 152 is connected to the atmospheric pressure water tank 10 for water supply and return via two flow acquisition pipelines 16 (the third flow acquisition pipeline 163 and the fourth flow acquisition pipeline 164, respectively), with the third flow acquisition pipeline 163 and the fourth flow acquisition pipeline 164 connected in parallel. Each flow acquisition pipeline 16 is equipped with a flow meter 27.

[0067] For example, a flow meter 27 with a range of 0.2~4 kg / s and an accuracy of 0.1% is installed in the first flow acquisition pipe 161; a flow meter 27 with a range of 4~8 kg / s and an accuracy of 0.1% is installed in the second flow acquisition pipe 162; a flow meter 27 with a range of 4~16 kg / s and an accuracy of 0.1% is installed in the third flow acquisition pipe 163; and a flow meter 27 with a range of 0.2~4 kg / s and an accuracy of 0.1% is installed in the fourth flow acquisition pipe 164.

[0068] To ensure the accuracy of flow meter 27, the length of the straight pipe section before and after flow meter 27 must be no less than ten times the pipe diameter. Since flow meter 27 has three pipe diameters: DN25, DN50, and DN80, the length of the straight pipe section before and after flow meter 27 must be no less than 250mm, 500mm, and 800mm, respectively.

[0069] In some embodiments, each product test pipe 15 may be connected to the water supply return atmospheric pressure water tank 10 through a flow acquisition pipe 16, that is, the product test pipe 15 and the flow acquisition pipe 16 are set in a one-to-one correspondence. This utility model embodiment does not make specific limitations in this regard.

[0070] In some implementations, such as Figure 3 As shown, an input connection can also be set between the second flow acquisition pipe 162 and the third flow acquisition pipe 163, and an electric ball valve 32 can be installed on the connected pipe.

[0071] In some implementations, such as Figure 3 As shown, an electric ball valve 32 is also installed on the flow acquisition pipe 16.

[0072] In some embodiments, such as Figure 1 or Figure 3 As shown, the drive module 12 includes an air supply pipe 121 and an air source 35. The input end of the air supply pipe 121 is connected to the air source 35, and the output end B of the air supply pipe 121 is connected to the opening end of the valve 171 to be tested. A pressure reducing valve 37, a safety valve 33 and a shut-off valve 34 are provided on the air supply pipe 121.

[0073] Specifically, during testing, the drive module 12 provides driving gas to the valve 171 under test, thereby controlling the valve 171 to be in the open state. The gas supply pipeline 121 is sequentially equipped with a filter 29, a shut-off valve 34, a pressure gauge 38, a pressure reducing valve 37, a pressure sensor 25, a safety valve 33, and a shut-off valve 34. In use, the pressure reducing valve 37 can reduce the upstream high-pressure gas to the target operating pressure and supply it to the valve 171 under test.

[0074] In some embodiments, such as Figure 1 or Figure 3 As shown, the gas supply pipeline 121 includes multiple output terminals B, and each output terminal B is set in a one-to-one correspondence with the product test pipeline 15.

[0075] Therefore, during product testing, the test station in the product test pipeline 15 is connected to the valve 171 to be tested, enabling the gas supply pipeline 121 to provide driving gas to different valves 171 to be tested. Specifically, a branch gas supply pipeline is set in the gas supply pipeline 121 corresponding to the safety valve 33, thereby realizing multiple output ends.

[0076] In some embodiments, such as Figure 1 or Figure 3 As shown, the drive module 12 also includes a venting pipe 122, one end of which is connected to the gas supply pipe 121.

[0077] The other end of the venting pipe 122 is connected to the recovery source 36, and a shut-off valve 34 is installed on the venting pipe 122.

[0078] Therefore, by setting up the vent pipe 122, the gas on the gas supply pipe 121 can be discharged and recovered after the test is completed.

[0079] In some implementations, such as Figure 1 or Figure 3 As shown, a buffer tank 39 is also installed on the flow supply booster pipeline 14. The buffer tank 39 is located on the output side of the variable frequency pump 24. A buffer tank (also known as a pressure stabilizing tank or energy storage tank) is a pressure vessel mainly used to balance pipeline pressure fluctuations, store some media, and assist in the stable operation of the system. For example, the buffer tank 39 can absorb pressure pulses generated by the variable frequency pump 24, preventing pipeline vibration and noise.

[0080] The terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0081] The above description is merely a preferred embodiment of this utility model and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of this utility model is not limited to the specific combination of the above-described technical features, but also includes other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the aforementioned inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features of the utility model in this utility model that have similar functions.

Claims

1. A valve testing system, characterized in that, include: The system includes a water supply and return atmospheric pressure tank, a flow supply booster module, a drive module, a product testing module, a flow acquisition module, and a measurement and control device; the water supply and return atmospheric pressure tank, the flow supply booster module, the product testing module, and the flow acquisition module are sequentially connected to form a closed-loop test circuit; The water supply return atmospheric pressure water tank is equipped with a water replenishment end; the flow supply boosting module includes a flow supply boosting pipeline and a variable frequency pump installed on the flow supply boosting pipeline. The input end of the flow supply boosting pipeline is connected to the water supply return atmospheric pressure water tank, and the output end of the flow supply boosting pipeline is connected to the product testing module. The product testing module includes a product testing pipeline and a testing station set in the product testing pipeline, the testing station being used to connect the valve to be tested; The flow acquisition module includes a flow acquisition pipe and a flow meter installed on the flow acquisition pipe. The input end of the flow acquisition pipe is connected to the product test pipe, and the output end of the flow acquisition pipe is connected to the water storage supply return atmospheric pressure water tank. The output end of the drive module is connected to the opening end of the valve to be tested; the measurement and control equipment includes a PLC control unit and a host computer that is communicatively connected to the PLC control unit; the PLC control unit is communicatively connected to the frequency converter pump.

2. The valve testing system according to claim 1, characterized in that, The bottom of the atmospheric pressure water tank for water supply and return is provided with a water outlet. A manual valve and a filter are installed on the pipeline between the outlet of the water supply return atmospheric pressure tank and the flow supply booster module; the manual valve is located between the filter and the water supply return atmospheric pressure tank.

3. The valve testing system according to claim 1, characterized in that, The top of the water supply and return atmospheric pressure water tank is provided with a return water end, and a back pressure regulating valve and a filter are provided on the pipeline between the return water end and the flow acquisition module; the filter is located between the back pressure regulating valve and the water supply and return atmospheric pressure water tank.

4. The valve testing system according to claim 1, characterized in that, The atmospheric pressure water tank for water supply and return is equipped with a level gauge, which is communicatively connected to the PLC control unit.

5. The valve testing system according to claim 1, characterized in that, The flow supply pressurization pipeline and the product testing pipeline are set up in a one-to-one correspondence.

6. The valve testing system according to claim 5, characterized in that, The flow supply booster pipeline includes a first flow supply booster pipeline and a second flow supply booster pipeline; the product testing pipeline includes a first product testing pipeline and a second product testing pipeline; The valve testing system also includes a connecting pipe, the first end of which is located between the first flow supply pressurization pipe and the first product testing pipe, and the second end of which is located between the second flow supply pressurization pipe and the second product testing pipe; An electric valve is installed on the connecting pipe, and the electric valve on the connecting pipe is communicatively connected to the PLC control unit.

7. The valve testing system according to claim 6, characterized in that, Each of the product test pipelines is connected to the water supply return atmospheric pressure water tank via multiple flow acquisition pipelines; wherein the multiple flow acquisition pipelines are arranged in parallel.

8. The valve testing system according to claim 1, characterized in that, The drive module includes an air supply pipe and an air source. The input end of the air supply pipe is connected to the air source, and the output end of the air supply pipe is connected to the opening end of the valve to be tested. The gas supply pipeline is equipped with a pressure reducing valve, a safety valve, and a shut-off valve.

9. The valve testing system according to claim 8, characterized in that, The gas supply pipeline includes multiple output ends, and each output end is set up in a one-to-one correspondence with the product test pipeline.

10. The valve testing system according to claim 8, characterized in that, The drive module also includes a venting pipe, one end of which is connected to the gas supply pipe; The other end of the venting pipe is connected to the recovery source, and a shut-off valve is installed on the venting pipe.

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