A high pressure pneumatic diaphragm valve life testing device and method

Abstract

The application discloses a high-pressure pneumatic diaphragm valve life test device and method, and relates to the field of valve life test devices, and specifically discloses a high-pressure pneumatic diaphragm valve life test device and a high-pressure pneumatic diaphragm valve life test method. The high-pressure pneumatic diaphragm valve life test device comprises a high-pressure pipeline and a low-pressure control pipeline. The high-pressure pipeline comprises a second gas source, a gas-gas pressurizing pump, a gas tank, a high-pressure regulating valve, a pressure gauge, a valve to be tested and a high-pressure normally closed pneumatic diaphragm valve which are sequentially connected through pipelines. An unloading pipe is arranged on the pipeline between the gas-gas pressurizing pump and the gas tank. A high-pressure unloading valve is detachably connected to the unloading pipe. A discharge pipe is arranged on the pipeline between the high-pressure regulating valve and the pressure gauge. A high-pressure discharge valve is detachably connected to the discharge pipe. The problems of the current high-pressure pneumatic diaphragm valve life test device, such as unsafe test and high test cost, are solved.

Description

Technical Field

[0001] This invention relates to the field of valve testing technology, and in particular to a device and method for testing the life of a high-pressure pneumatic diaphragm valve. Background Technology

[0002] With the rapid development of semiconductor technology, the precision requirements of semiconductor manufacturing processes are becoming increasingly stringent, necessitating high cleanliness and specialized manufacturing processes, thus placing higher demands on production equipment. Among these, pneumatic diaphragm valves are widely used in the semiconductor industry. High-pressure pneumatic diaphragm valves not only possess the advantages of fast response, easy cleaning, and long service life of low-pressure pneumatic diaphragm valves, but also can transmit high-pressure, corrosion-resistant media. The structural principle of high-pressure and low-pressure pneumatic diaphragm valves is similar, mainly consisting of a pneumatic head, valve body, and connecting parts. An external seal, or hard seal, is formed between the diaphragm and valve body through the threaded preload of the connecting parts. For normally closed high-pressure pneumatic diaphragm valves, when the pneumatic head is not vented, the diaphragm is pressed against the valve seat by the indirect force of the double cylindrical compression springs, forming an internal seal with the upper end face of the valve seat. When the pneumatic head is vented, the lower ends of the upper and lower pistons of the pneumatic head move upwards under gas pressure, pushing the springs to compress again, separating the diaphragm from the valve seat, and opening the valve. The lifespan of high-pressure pneumatic diaphragm valves ranges from several million to tens of millions of cycles. Due to the harsh operating conditions, the losses caused by leakage are incalculable. Therefore, it is essential to conduct random inspections of the lifespan of high-pressure pneumatic diaphragm valves.

[0003] Currently, commonly used life testing devices employ a high-pressure pneumatic diaphragm valve, with one end supplying high-pressure gas and the other connected to the atmosphere. The opening and closing of the pneumatic head of the diaphragm valve is directly controlled by a solenoid valve. While this testing device is simple, it involves direct venting to the atmosphere at high pressure, resulting in a very large volume of gas released each time. This poses both safety risks and high costs, as the test gas typically uses high-purity nitrogen or other expensive high-purity gases. Millions to tens of millions of venting cycles would consume a significant amount of test gas, increasing testing costs. Furthermore, due to the large volume of gas released each time, the gas source pressure connected to the inlet of the high-pressure pneumatic diaphragm valve requires a period of replenishment, making it difficult to instantly increase the test pressure. To ensure test reliability, a 2-5 second waiting period for pressure stabilization is necessary before the next venting cycle. However, with millions to tens of millions of tests, the accumulated time will incur even greater time costs, leading to both safety concerns and high testing costs.

[0004] A utility model application with application number 202121793250.7 and publication number CN215865690U discloses an aircraft pneumatic valve testing device. This aircraft pneumatic valve testing device has the advantage of being easy to use, but it still has the problems of unsafe testing and high testing costs. Summary of the Invention

[0005] Based on this, and in response to the above problems, the present invention proposes a high-pressure pneumatic diaphragm valve life testing device and method, which solves the problems of unsafe testing and high testing cost of current high-pressure pneumatic diaphragm valve life testing devices.

[0006] The technical solution of this invention is:

[0007] A high-pressure pneumatic diaphragm valve life testing device includes a high-pressure pipeline and a low-pressure control pipeline. The high-pressure pipeline includes a second air source, a pneumatic booster pump, an air tank, a high-pressure regulating valve, a pressure gauge, a valve under test, and a high-pressure normally closed pneumatic diaphragm valve, which are connected sequentially through a pipeline. The second air source, the pneumatic booster pump, the air tank, the high-pressure regulating valve, the pressure gauge, the valve under test, and the high-pressure normally closed pneumatic diaphragm valve are all detachably connected to the pipeline. An unloading pipe is provided on the pipeline between the pneumatic booster pump and the air tank, and a high-pressure unloading valve is detachably connected to the unloading pipe. A venting pipe is provided on the pipeline between the high-pressure regulating valve and the pressure gauge, and a high-pressure venting valve is detachably connected to the venting pipe.

[0008] The low-pressure control pipeline includes a first gas source, a main pipeline connected to the first gas source, a first branch pipe and a second branch pipe connected to the main pipeline, a third branch pipe and a fourth branch pipe connected to the first branch pipe, and a fifth branch pipe and a sixth branch pipe connected to the third branch pipe.

[0009] The second branch pipe is equipped with a first air pressure regulating valve, and the other end of the second branch pipe is connected to an air booster pump. The first branch pipe is equipped with a second air pressure regulating valve. The fourth branch pipe is equipped with a first solenoid valve, and the other end of the fourth branch pipe is connected to the valve under test and is detachably connected to the valve under test. The fifth and sixth branch pipes are equipped with a second solenoid valve and a third air pressure regulating valve, respectively, and the other ends of the fifth and sixth branch pipes are respectively connected to a high-pressure normally closed pneumatic diaphragm valve. The first solenoid valve and the second solenoid valve are controlled by a controller.

[0010] Preferably, one end of the high-pressure unloading valve is connected to the pipeline between the gas booster pump and the gas tank via an unloading pipe, and the high-pressure unloading valve is connected to the flange of the unloading pipe; the other end is connected to the atmosphere via a detachable pipeline. One end of the high-pressure relief valve is connected to the pipeline between the high-pressure regulating valve and the pressure gauge via a relief pipe, and the high-pressure relief valve is connected to the flange of the relief pipe; the other end is connected to the atmosphere via a detachable pipeline. One end of the high-pressure normally closed pneumatic diaphragm valve is connected to the valve under test via a pipeline, and the other end is connected to the atmosphere via a detachable pipeline.

[0011] Preferably, the outlet of the second air source is connected to the inlet of the air-to-air booster pump through a pipeline, and the outlet of the second air source is connected to a flange at one end of the pipeline, while the inlet of the air-to-air booster pump is connected to a flange at the other end of the pipeline.

[0012] The outlet of the gas booster pump is connected to the inlet of the gas tank through a pipeline, and the outlet of the gas booster pump is connected to a flange at one end of the pipeline, while the inlet of the gas tank is connected to a flange at the other end of the pipeline.

[0013] The outlet of the gas tank is connected to the inlet of the high-pressure regulating valve through a pipeline, and the outlet of the gas tank is connected to a flange at one end of the pipeline, while the inlet of the high-pressure regulating valve is connected to a flange at the other end of the pipeline.

[0014] The outlet of the high-pressure regulating valve is connected to the inlet of the pressure gauge through a pipeline, and the outlet of the high-pressure regulating valve is connected to a flange at one end of the pipeline, while the inlet of the pressure gauge is connected to a flange at the other end of the pipeline.

[0015] The outlet of the pressure gauge is connected to the inlet of the valve under test through a pipeline, and the outlet of the pressure gauge is connected to a flange at one end of the pipeline, while the inlet of the valve under test is connected to a flange at the other end of the pipeline.

[0016] The outlet of the valve under test is connected to the inlet of the high-pressure normally closed pneumatic diaphragm valve through a pipeline, and the outlet of the valve under test is connected to a flange at one end of the pipeline, while the inlet of the high-pressure normally closed pneumatic diaphragm valve is connected to a flange at the other end of the pipeline.

[0017] A method for testing the lifespan of a high-pressure pneumatic diaphragm valve, using a high-pressure pneumatic diaphragm valve lifespan testing device, includes the following steps:

[0018] Step 1: Install the high-pressure pneumatic diaphragm valve to be measured at the position of the valve to be tested, complete the installation of the life test device, and confirm that the controller, the first air pressure regulating valve, the second air pressure regulating valve, and the high-pressure relief valve are all in the closed state, and the high-pressure regulating valve is in the open state; then turn on the first air source and the second air source, adjust the first air pressure regulating valve to start the air booster pump and slowly increase the pressure.

[0019] Step 2: Adjust the first air pressure regulating valve to slowly increase the pressure until the pressure gauge reading is the test pressure. Stop increasing the pressure and wait for 5-10 minutes. Observe whether the pressure gauge reading drops and whether the through-air booster pump operates.

[0020] Step 3: Adjust the second air pressure regulating valve so that the displayed value of the second air pressure regulating valve is within the preset range.

[0021] Step 4: Turn on the controller and begin the life test. The logic relationship between the controller and solenoid valves 1 and 2 is as follows:

[0022] a) The second solenoid valve is closed, and the high-pressure pneumatic diaphragm valve is closed;

[0023] b) The first solenoid valve opens, the valve under test opens for t1 seconds, and after the test pressure is reached, the second solenoid valve opens for t2 seconds, and the high-pressure pneumatic diaphragm valve opens accordingly for t2 seconds.

[0024] c) The first solenoid valve closes, the valve under test closes for t3 seconds, the second solenoid valve closes for t4 seconds, and the high-pressure pneumatic diaphragm valve closes for t4 seconds accordingly.

[0025] d) Repeat steps b) and c) to cycle through the cycle life test until the required number of cycles is reached;

[0026] Step 5: After the life test is completed, turn off the second air source, turn off the controller, and close the first air pressure regulating valve. Slowly open the high-pressure relief valve to release the air pressure in the high-pressure pipeline until the reading on the pressure gauge is 0. Then, slowly adjust the third air pressure regulating valve so that the reading on the third air pressure regulating valve is within the preset range to release the air pressure at the end of the high-pressure pipeline. Then, turn off the first air source, close the second air pressure regulating valve, and close the third air pressure regulating valve. The test is now complete.

[0027] Preferably, in step one, if a gas hissing sound is present, an abnormality handling step is performed; otherwise, step two is performed.

[0028] Preferably, in step two, if there are no abnormalities during the process, it means that the airtightness of the pipeline in the life test device is good, and step three is performed; if the pressure gauge reading drops or the air booster pump is activated, an abnormality handling step is required.

[0029] Preferably, the exception handling steps are as follows:

[0030] Stop pressurizing, close the first air pressure regulating valve, close the first air source and the second air source, open the high pressure relief valve, and continue until the pressure gauge reads 0. Then check for leaks in the pipeline of the life test device. After eliminating the leaks, start the test again from step one.

[0031] Preferably, in step three, the display value range of the second pressure regulating valve is preset to be 0.4 MPa to 0.6 MPa.

[0032] Preferably, in step four, the range of t1, t2, t3 and t4 is 0.2s to 2s.

[0033] Preferably, in step five, the preset display value range of the third pressure regulating valve is 0.35 MPa to 0.6 MPa.

[0034] Compared with the prior art, the beneficial effects of the present invention are:

[0035] In this invention, the controller primarily controls the first and second solenoid valves to achieve the opening and closing sequence and duration according to a set logic. It controls the opening and closing of the first and second solenoid valves by sending pulse signals and counts the pulse signals. The first, second, and third pressure regulating valves are mainly used to regulate the pressure in the control pipeline. The air-to-air booster pump is used to provide sufficient pressure to the high-pressure pipeline. The high-pressure unloading valve is used to protect the high-pressure pipeline, automatically releasing pressure in case of abnormalities. The gas tank is used to ensure the stability of the high-pressure pipeline pressure; with a high-pressure gas tank in the pipeline, a small amount of gas release will not significantly affect the pressure, and the air-to-air booster pump can quickly replenish the pressure. The high-pressure regulating valve and high-pressure relief valve are used to control the high-pressure pipeline. The pressure gauge is used to display the real-time pressure of the high-pressure pipeline. The high-pressure normally closed pneumatic diaphragm valve is used to control the discharge of high-pressure gas from the pipeline.

[0036] During use, install the high-pressure pneumatic diaphragm valve to be measured at the position of the valve under test, completing the installation of the life test device. Confirm that the controller, first air pressure regulating valve, second air pressure regulating valve, and high-pressure relief valve are in the closed state, and the high-pressure regulating valve is in the open state. Then, turn on the first and second air sources, adjust the first air pressure regulating valve to start the air-to-air booster pump, and slowly increase the pressure until the pressure gauge displays the test pressure. Stop increasing the pressure, adjust the second air pressure regulating valve until its display reaches the test pressure, and control the opening and closing of the first and second solenoid valves via the controller. The timing is coordinated with the opening time of the normally closed high-pressure pneumatic diaphragm valve to complete the cycle life test. Then, the second air source is shut off, the controller is shut off, the first air pressure regulating valve is shut off, and the high-pressure relief valve is slowly opened to release the air pressure in the high-pressure pipeline until the pressure gauge reading is 0. The third air pressure regulating valve is slowly adjusted to the preset pressure range, and then the air pressure at the end of the high-pressure pipeline is released. Then, the first air source is shut off, the second air pressure regulating valve is shut off, and the third air pressure regulating valve is shut off to complete the shutdown of the device. This solves the problems of unsafe testing and high testing cost of the current high-pressure pneumatic diaphragm valve life testing device. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of a high-pressure pneumatic diaphragm valve life testing device described in an embodiment of the present invention;

[0038] Explanation of reference numerals in the attached figures:

[0039] 10-High-pressure pipeline, 100-Second air source, 110-Gas booster pump, 120-Air tank, 130-High-pressure regulating valve, 140-Pressure gauge, 150-Valve to be tested, 160-High-pressure normally closed pneumatic diaphragm valve, 20-Low-pressure control pipeline, 21-First air source, 22-Main pipeline, 23-First branch pipe, 24-Second branch pipe, 25-Third branch pipe, 26-Fourth branch pipe, 27-Fifth branch pipe, 28-Sixth branch pipe, 200-First air pressure regulating valve, 210-Second air pressure regulating valve, 220-First solenoid valve, 230-Second solenoid valve, 240-Third air pressure regulating valve, 250-Controller, 30-Unloading pipe, 31-High-pressure unloading valve, 32-Relief pipe, 33-High-pressure relief valve. Detailed Implementation

[0040] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0041] Example 1:

[0042] like Figure 1 As shown, this embodiment discloses a high-pressure pneumatic diaphragm valve life testing device, including a high-pressure pipeline 10 and a low-pressure control pipeline 20. The high-pressure pipeline 10 includes a second air source 100, a pneumatic booster pump 110, an air tank 120, a high-pressure regulating valve 130, a pressure gauge 140, a valve under test 150, and a high-pressure normally closed pneumatic diaphragm valve 160, which are connected in sequence through a pipeline. The high-pressure regulating valve 130, pressure gauge 140, test valve 150 and high-pressure normally closed pneumatic diaphragm valve 160 are all detachably connected to the pipeline. The pipeline between the air booster pump 110 and the air tank 120 is provided with an unloading pipe 30. A high-pressure unloading valve 31 is detachably connected to the unloading pipe 30. The pipeline between the high-pressure regulating valve 130 and the pressure gauge 140 is provided with a vent pipe 32. A high-pressure vent valve 33 is detachably connected to the vent pipe 32.

[0043] The low-pressure control pipeline 20 includes a first gas source 21, a main pipeline 22 connected to the first gas source 21, a first branch pipe 23 and a second branch pipe 24 connected to the main pipeline 22, a third branch pipe 25 and a fourth branch pipe 26 connected to the first branch pipe 23, and a fifth branch pipe 27 and a sixth branch pipe 28 connected to the third branch pipe 25.

[0044] The second branch pipe 24 is equipped with a first air pressure regulating valve 200, and the other end of the second branch pipe 24 is connected to the air booster pump 110. The first branch pipe 23 is equipped with a second air pressure regulating valve 210. The fourth branch pipe 26 is equipped with a first solenoid valve 220, and the other end of the fourth branch pipe 26 is connected to the valve under test 150 and is detachably connected to the valve under test 150. The fifth branch pipe 27 and the sixth branch pipe 28 are respectively equipped with a second solenoid valve 230 and a third air pressure regulating valve 240, and the other ends of the fifth branch pipe 27 and the sixth branch pipe 28 are respectively connected to a high-pressure normally closed pneumatic diaphragm valve 160. The first solenoid valve 220 and the second solenoid valve 230 are controlled by a controller 250.

[0045] In this invention, the controller 250 mainly controls the first solenoid valve 220 and the second solenoid valve 230 to realize the opening and closing sequence and opening and closing duration according to the set logic. It controls the opening and closing of the first solenoid valve 220 and the second solenoid valve 230 by sending pulse signals to them and completes the counting of pulse signals. The first air pressure regulating valve 200, the second air pressure regulating valve 210, and the third air pressure regulating valve 240 are mainly used to regulate the air pressure in the control pipeline. The air-to-air booster pump 110 is used to provide sufficient air pressure to the high-pressure pipeline 10. High-pressure unloading... Valve 31 is used to protect the high-pressure pipeline 10 and automatically depressurizes when an abnormality occurs; gas tank 120 is used to ensure the stability of the gas pressure in the high-pressure pipeline 10. With the high-pressure gas tank 120 in the pipeline, when a small amount of gas is released, it will not have a significant impact on the gas pressure, and the gas pressure can be quickly replenished by the gas booster pump 110; high-pressure regulating valve 130 and high-pressure relief valve 33 are used to control the high-pressure pipeline 10; pressure gauge 140 is used to display the real-time gas pressure of the high-pressure pipeline 10; high-pressure normally closed pneumatic diaphragm valve 160 is used to control the gas pressure discharge of the high-pressure pipeline 10.

[0046] During use, install the high-pressure pneumatic diaphragm valve to be measured at the position of the valve under test 150 to complete the installation of the life test device. Confirm that the controller 250, the first air pressure regulating valve 200, the second air pressure regulating valve 210, and the high-pressure relief valve 33 are in the closed state, and the high-pressure regulating valve 130 is in the open state. Then, turn on the first air source 21 and the second air source 100, adjust the first air pressure regulating valve 200 to start the air booster pump 110, and slowly increase the pressure until the pressure gauge 140 displays the test pressure. Then, stop the pressurization and adjust the second air pressure regulating valve 210 until the displayed value of the second air pressure regulating valve 210 reaches the test pressure. The controller 250 controls the first solenoid valve 220 and the second solenoid valve 220. The opening and closing time of valve 230 is coordinated with the opening time of high-pressure normally closed pneumatic diaphragm valve 160 to complete the cycle life test. Then, the second air source 100 is shut off, the controller 250 is shut off, the first air pressure regulating valve 200 is shut off, and the high-pressure relief valve 33 is slowly opened to release the air pressure in the high-pressure pipeline 10 until the pressure gauge 140 reads 0. The third air pressure regulating valve 240 is slowly adjusted to the preset pressure range, and then the air pressure at the end of the high-pressure pipeline 10 is released. Then, the first air source 21 is shut off, the second air pressure regulating valve 210 is shut off, and the third air pressure regulating valve 240 is shut off to complete the shutdown of the device. This solves the problems of unsafe testing and high testing cost of the current high-pressure pneumatic diaphragm valve life testing device.

[0047] To ensure safer gas venting during life testing and facilitate the installation and disassembly of the life testing device, this embodiment improves upon the previous embodiment. The difference lies in that one end of the high-pressure unloading valve 31 is connected to the gas booster pump 110 and the gas tank 120 via the unloading pipe 30, and the high-pressure unloading valve 31 is flange-connected to the unloading pipe 30; the other end is connected to the atmosphere via a detachable pipe. Similarly, one end of the high-pressure relief valve 33 is connected to the high-pressure regulating valve 130 and the pressure gauge 140 via the relief pipe 32, and the high-pressure relief valve 33 is flange-connected to the relief pipe 32; the other end is connected to the atmosphere via a detachable pipe. Finally, one end of the high-pressure normally closed pneumatic diaphragm valve 160 is connected to the valve under test 150 via a pipe, and the other end is connected to the atmosphere via a detachable pipe.

[0048] In use, the high-pressure unloading valve 31 can be connected to the unloading pipe 30 through a flange to achieve quick installation and disassembly, while also having better sealing performance; the high-pressure relief valve 33 can be connected to the relief pipe 32 through a flange to achieve quick installation and disassembly, while also having better sealing performance.

[0049] To facilitate the installation and disassembly of the life testing device and to improve the airtightness of the entire life testing device, this embodiment is an improvement on the above embodiment. The difference from the above embodiment is that the outlet of the second air source 100 is connected to the inlet of the air-to-air booster pump 110 through a pipeline, and the outlet of the second air source 100 is connected to a flange at one end of the pipeline (i.e., the pipeline between the second air source 100 and the air-to-air booster pump 110), and the inlet of the air-to-air booster pump 110 is connected to a flange at the other end of the pipeline (i.e., the pipeline between the second air source 100 and the air-to-air booster pump 110).

[0050] The outlet of the gas booster pump 110 is connected to the inlet of the gas tank 120 through a pipeline, and the outlet of the gas booster pump 110 is connected to a flange at one end of the pipeline (i.e., the pipeline between the gas tank 120 and the gas booster pump 110), while the inlet of the gas tank 120 is connected to a flange at the other end of the pipeline (i.e., the pipeline between the gas tank 120 and the gas booster pump 110).

[0051] The outlet of the gas tank 120 is connected to the inlet of the high-pressure regulating valve 130 through a pipeline, and the outlet of the gas tank 120 is connected to one flange of the pipeline (i.e., the pipeline between the gas tank 120 and the high-pressure regulating valve 130), and the inlet of the high-pressure regulating valve 130 is connected to the other flange of the pipeline (i.e., the pipeline between the gas tank 120 and the high-pressure regulating valve 130).

[0052] The outlet of the high-pressure regulating valve 130 is connected to the inlet of the pressure gauge 140 through a pipeline, and the outlet of the high-pressure regulating valve 130 is connected to one flange of the pipeline (i.e., the pipeline between the pressure gauge 140 and the high-pressure regulating valve 130), and the inlet of the pressure gauge 140 is connected to the other flange of the pipeline (i.e., the pipeline between the pressure gauge 140 and the high-pressure regulating valve 130).

[0053] The outlet of the pressure gauge 140 is connected to the inlet of the valve under test 150 through a pipe, and the outlet of the pressure gauge 140 is connected to one flange of the pipe (i.e., the pipe between the pressure gauge 140 and the valve under test 150), and the inlet of the valve under test 150 is connected to the other flange of the pipe (i.e., the pipe between the pressure gauge 140 and the valve under test 150).

[0054] The outlet of the valve under test 150 is connected to the inlet of the high-pressure normally closed pneumatic diaphragm valve 160 through a pipeline, and the outlet of the valve under test 150 is connected to one flange of the pipeline (i.e., the pipeline between the high-pressure normally closed pneumatic diaphragm valve 160 and the valve under test 150), and the inlet of the high-pressure normally closed pneumatic diaphragm valve 160 is connected to the other flange of the pipeline (i.e., the pipeline between the high-pressure normally closed pneumatic diaphragm valve 160 and the valve under test 150).

[0055] When in use, the second air source 100, the air booster pump 110, the air tank 120, the high pressure regulating valve 130, the pressure gauge 140, the valve to be tested 150 and the high pressure normally closed pneumatic diaphragm valve 160 are connected by pipelines. The connection between the pipelines and the pipelines is a flange connection, which can effectively improve the airtightness of the life test device and solve the problem of test interruption caused by gas leakage during the test.

[0056] Preferably, the controller 250 is a PLC controller in the prior art.

[0057] A flange connection is a detachable joint in which two pipes, fittings or equipment are first fixed to a flange, then a flange gasket is placed between the two flanges, and finally the two flanges are tightened with bolts to make them tightly connected.

[0058] Example 2:

[0059] like Figure 1 As shown, a method for testing the lifespan of a high-pressure pneumatic diaphragm valve, using a high-pressure pneumatic diaphragm valve lifespan testing device, includes the following steps:

[0060] Step 1: Install the high-pressure pneumatic diaphragm valve to be measured at the position of the valve under test 150 to complete the installation of the life test device. Confirm that the controller 250, the first air pressure regulating valve 200, the second air pressure regulating valve 210, and the high-pressure relief valve 33 are all in the closed state, and the high-pressure regulating valve 130 is in the open state. Then turn on the first air source 21 and the second air source 100, and adjust the first air pressure regulating valve 200 to start the air booster pump 110 to slowly increase the pressure.

[0061] Step 2: Adjust the first air pressure regulating valve 200 to slowly increase the pressure until the reading on the pressure gauge 140 is the test pressure. Stop increasing the pressure and wait for 5 to 10 minutes. Observe whether the reading on the pressure gauge 140 has dropped and whether the through air booster pump 110 has been activated.

[0062] Step 3: Adjust the second air pressure regulating valve 210 so that the displayed value of the second air pressure regulating valve 210 is within the preset range.

[0063] Step 4: Turn on controller 250 to begin the life test. The logic relationship between controller 250 and solenoid valves 1 and 2 is as follows:

[0064] a) The second solenoid valve 230 is closed, and the high-pressure pneumatic diaphragm valve is closed;

[0065] b) The first solenoid valve 220 opens, the valve under test 150 opens for t1 seconds, and after the test pressure is reached, the second solenoid valve 230 opens for t2 seconds, and the high-pressure pneumatic diaphragm valve opens accordingly for t2 seconds.

[0066] c) The first solenoid valve 220 closes, the valve under test 150 closes for t3 seconds, the second solenoid valve 230 closes for t4 seconds, and the high-pressure pneumatic diaphragm valve closes for t4 seconds accordingly.

[0067] d) Repeat steps b) and c) to cycle through the cycle life test until the required number of cycles is reached;

[0068] Step 5: After the life test is completed, turn off the second air source 100, turn off the controller 250, and turn off the first air pressure regulating valve 200. Slowly open the high pressure relief valve 33 to release the air pressure in the high pressure pipeline 10 until the reading on the pressure gauge 140 is 0. Then slowly adjust the third air pressure regulating valve 240 so that the displayed value of the third air pressure regulating valve 240 is within the preset range to release the air pressure at the end of the high pressure pipeline 10. Then turn off the first air source 21, turn off the second air pressure regulating valve 210, and turn off the third air pressure regulating valve 240. The test is now complete.

[0069] Preferably, in step one, if a gas hissing sound is present, an abnormality handling step is performed; otherwise, step two is performed.

[0070] Preferably, in step two, if there are no abnormalities during the process, it means that the airtightness of the pipeline in the life test device is good, and step three is carried out; if the reading of pressure gauge 140 drops or the air booster pump 110 is activated, then an abnormality handling step is required.

[0071] Preferably, the exception handling steps are as follows:

[0072] Stop pressurizing, close the first air pressure regulating valve 200, close the first air source 21 and the second air source 100, open the high pressure relief valve 33, and continue until the reading on the pressure gauge 140 is 0. Then check for leaks in the pipeline of the life test device. After eliminating the leaks, start the test again from step one.

[0073] Preferably, in step three, the second pressure regulating valve 210 is preset to display a value range of 0.4 MPa to 0.6 MPa.

[0074] Preferably, in step four, the range of t1, t2, t3 and t4 is 0.2s to 2s.

[0075] Preferably, in step five, the preset display value range of the third pressure regulating valve 240 is 0.35 MPa to 0.6 MPa.

[0076] In use, since the times t1, t2, t3, and t4 in step four can all be set according to the actual situation, and the range of t1, t2, t3, and t4 is 0.2s to 2s, compared with the prior art, the opening and closing time of each discharge in this invention can be set to be very short, for example: 0.2s, 0.3s, 0.4s, 0.5s, 0.6s, 0.7s, 0.8s, 0.9s, 1.0s, 1.1s, 1.2s, 1.3s, 1.4s, 1.5s, 1.6s, 1.7s, 1.8s, 1.9s, or 2.0s;

[0077] During testing, the opening and closing time of this invention is shorter than that of existing technologies (2s to 5s), resulting in a smaller amount of gas released each time. This not only saves on gas and time costs but also makes the testing process safer and more stable, reducing the probability of accidents. Furthermore, all components in this invention are existing technologies, readily available, and detachably connected via pipes, offering advantages such as simple assembly, low platform construction cost, high safety, and ease of operation.

[0078] Working principle of this invention:

[0079] During use, install the high-pressure pneumatic diaphragm valve to be measured at the position of the valve under test 150 to complete the installation of the life test device. Confirm that the controller 250, the first air pressure regulating valve 200, the second air pressure regulating valve 210, and the high-pressure relief valve 33 are in the closed state, and the high-pressure regulating valve 130 is in the open state. Then, turn on the first air source 21 and the second air source 100, adjust the first air pressure regulating valve 200 to start the air booster pump 110, and slowly increase the pressure until the pressure gauge 140 displays the test pressure. Then, stop the pressurization and adjust the second air pressure regulating valve 210 until the displayed value of the second air pressure regulating valve 210 reaches the test pressure. The controller 250 then controls the pressure. The opening and closing times of the first solenoid valve 220 and the second solenoid valve 230 are coordinated with the opening time of the high-pressure normally closed pneumatic diaphragm valve 160 to complete the cycle life test; then the second air source 100 is shut off, the controller 250 is shut off, the first air pressure regulating valve 200 is shut off, and the high-pressure relief valve 33 is slowly opened to release the air pressure in the high-pressure pipeline 10 until the pressure gauge 140 reads 0. The third air pressure regulating valve 240 is slowly adjusted to the preset pressure range, and then the air pressure at the end of the high-pressure pipeline 10 is released; then the first air source 21 is shut off, the second air pressure regulating valve 210 is shut off, and the third air pressure regulating valve 240 is shut off to complete the shutdown of the device.

[0080] The embodiments described above are merely illustrative of specific implementations of the present invention, and while the descriptions are detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A high pressure diaphragm valve life testing apparatus, characterized by, The utility model provides a kind of high pressure test device, including high pressure pipeline (10) and low pressure control pipeline (20), the high pressure pipeline (10) includes second gas source (100), air air booster pump (110), gas tank (120), high pressure regulating valve (130), pressure gauge (140), valve (150) and high pressure normally closed pneumatic diaphragm valve (160) sequentially by pipeline communication, and second gas source (100), air air booster pump (110), gas tank (120), high pressure regulating valve (130), pressure gauge (140), valve (150) and high pressure normally closed pneumatic diaphragm valve (160) are detachably connected with pipeline, pipeline between air air booster pump (110) and gas tank (120) is equipped with unloading pipe (30), high pressure unloading valve (31) is detachably connected on unloading pipe (30), high pressure regulating valve (130) and pressure gauge (140) between pipeline are equipped with blow-off pipe (32), high pressure blow-off valve (33) is detachably connected on blow-off pipe (32). The low pressure control pipeline (20) includes a first gas source (21), a main pipeline (22) in communication with the first gas source (21), a first branch pipe (23) and a second branch pipe (24) in communication with the main pipeline (22), a third branch pipe (25) and a fourth branch pipe (26) in communication with the first branch pipe (23), and a fifth branch pipe (27) and a sixth branch pipe (28) in communication with the third branch pipe (25). The second branch pipe (24) is provided with a first air pressure regulating valve (200), and the other end of the second branch pipe (24) is in communication with the air air booster pump (110). The first branch pipe (23) is provided with a second air pressure regulating valve (210). The fourth branch pipe (26) is provided with a first electromagnetic valve (220), and the other end of the fourth branch pipe (26) is in communication with and detachably connected with the valve (150). The fifth branch pipe (27) and the sixth branch pipe (28) are respectively provided with a second electromagnetic valve (230) and a third air pressure regulating valve (240), and the other ends of the fifth branch pipe (27) and the sixth branch pipe (28) are respectively connected with the high pressure normally closed pneumatic diaphragm valve (160). The first electromagnetic valve (220) and the second electromagnetic valve (230) are respectively controlled by a controller (250).

2. A high pressure diaphragm valve life testing apparatus as claimed in claim 1, wherein, One end of the high pressure unloading valve (31) is in communication with the pipeline between the air air booster pump (110) and the gas tank (120) through the unloading pipe (30), and the high pressure unloading valve (31) is flange connected with the unloading pipe (30). The other end is in communication with the atmosphere through a detachably connected pipeline. One end of the high pressure blow-off valve (33) is in communication with the pipeline between the high pressure regulating valve (130) and the pressure gauge (140) through the blow-off pipe (32), and the high pressure blow-off valve (33) is flange connected with the blow-off pipe (32). The other end is in communication with the atmosphere through a detachably connected pipeline. One end of the high pressure normally closed pneumatic diaphragm valve (160) is in communication with the valve (150) through a pipeline, and the other end is in communication with the atmosphere through a detachably connected pipeline.

3. A high pressure diaphragm valve life testing apparatus as claimed in claim 2, wherein, The gas outlet end of the second gas source (100) is connected to the gas inlet end of the gas-gas booster pump (110) through a pipeline, and the gas outlet end of the second gas source (100) is connected to one end of the pipeline through a flange, and the gas inlet end of the gas-gas booster pump (110) is connected to the other end of the pipeline through a flange; The gas outlet end of the gas-gas booster pump (110) is connected to the gas inlet end of the gas tank (120) through a pipeline, and the gas outlet end of the gas-gas booster pump (110) is connected to one end of the pipeline through a flange, and the gas inlet end of the gas tank (120) is connected to the other end of the pipeline through a flange; The gas outlet end of the gas tank (120) is connected to the gas inlet end of the high-pressure regulating valve (130) through a pipeline, and the gas outlet end of the gas tank (120) is connected to one end of the pipeline through a flange, and the gas inlet end of the high-pressure regulating valve (130) is connected to the other end of the pipeline through a flange; The gas outlet end of the high-pressure regulating valve (130) is connected to the gas inlet end of the pressure gauge (140) through a pipeline, and the gas outlet end of the high-pressure regulating valve (130) is connected to one end of the pipeline through a flange, and the gas inlet end of the pressure gauge (140) is connected to the other end of the pipeline through a flange; The gas outlet end of the pressure gauge (140) is connected to the gas inlet end of the valve to be tested (150) through a pipeline, and the gas outlet end of the pressure gauge (140) is connected to one end of the pipeline through a flange, and the gas inlet end of the valve to be tested (150) is connected to the other end of the pipeline through a flange; The gas outlet end of the valve to be tested (150) is connected to the gas inlet end of the high-pressure normally closed pneumatic diaphragm valve (160) through a pipeline, and the gas outlet end of the valve to be tested (150) is connected to one end of the pipeline through a flange, and the gas inlet end of the high-pressure normally closed pneumatic diaphragm valve (160) is connected to the other end of the pipeline through a flange.

4. A method of high pressure diaphragm valve life testing, characterized by, The high-pressure pneumatic diaphragm valve life test device of any one of claims 1-3 comprises the following steps: Step one: install the high-pressure pneumatic diaphragm valve to be measured in the position of the valve to be tested (150), complete the installation of the life test device, confirm that the controller (250), the first gas pressure regulating valve (200), the second gas pressure regulating valve (210), and the high-pressure relief valve (33) are all in the closed state, and the high-pressure regulating valve (130) is in the open state; then open the first gas source (21) and the second gas source (100), adjust the first gas pressure regulating valve (200), and make the gas-gas booster pump (110) start to act, and slowly increase the pressure; Step two, adjust the first gas pressure regulating valve (200) to slowly increase the pressure to the value shown by the pressure gauge (140) to the test pressure, stop increasing the pressure, wait for 5-10 min, and observe whether the value of the pressure gauge (140) decreases and whether the gas-gas booster pump (110) acts throughout; Step three, adjust the second gas pressure regulating valve (210) to make the value shown by the second gas pressure regulating valve (210) within the pre-set range; Step four, open the controller (250) to start the life test, wherein the logical relationship between the controller (250) and the electromagnetic valve 1 and the electromagnetic valve 2 is: a) the second electromagnetic valve (230) is closed, and the high-pressure pneumatic diaphragm valve is closed; b) the first electromagnetic valve (220) is opened, the valve under test (150) is opened for t1 seconds, after reaching the test pressure, the second electromagnetic valve (230) is opened for t2 seconds, and the high-pressure pneumatic diaphragm valve is opened for t2 seconds accordingly; c) the first electromagnetic valve (220) is closed, the valve under test (150) is closed for t3 seconds, the second electromagnetic valve (230) is closed for t4 seconds, and the high-pressure pneumatic diaphragm valve is closed for t4 seconds accordingly; d) b) and c) are repeatedly executed, and b) and c) are periodically cycled until the number of cycle life tests is reached; Step five: after the life test is completed, the second gas source (100) is closed, the controller (250) is closed, the first gas pressure regulating valve (200) is closed, the high-pressure relief valve (33) is slowly opened to release the pressure of the high-pressure pipeline (10), until the pressure gauge (140) shows 0; then the third gas pressure regulating valve (240) is slowly adjusted, so that the third gas pressure regulating valve (240) is within the pre-set range, and the pressure at the end of the high-pressure pipeline (10) is released; then the first gas source (21) is closed, the second gas pressure regulating valve (210) is closed, and the third gas pressure regulating valve (240) is closed, and the test is completed.

5. A method of testing the life of a high pressure pneumatic diaphragm valve according to claim 4, characterized in that, In step one, if there is a gas whistling sound, the abnormal processing step is performed; if not, step two is performed.

6. A method of testing the life of a high pressure pneumatic diaphragm valve according to claim 5, characterized in that, In step two, if there is no abnormality in the process, it means that the pipeline of the life test device is in good airtightness, and step three is performed; if the pressure gauge (140) shows a decrease or the gas booster pump (110) moves, the abnormal processing step needs to be performed.

7. A method of testing the life of a high pressure pneumatic diaphragm valve according to claim 6, characterized in that, The abnormal processing step is as follows: Stop boosting, close the first gas pressure regulating valve (200), close the first gas source (21) and the second gas source (100), open the high-pressure relief valve (33), until the pressure gauge (140) shows 0, check the leakage point of the pipeline of the life test device, and after eliminating the leakage point, start testing from step one again.

8. The method of claim 4, wherein, In step three, the pre-set range of the second gas pressure regulating valve (210) is 0.4mpa-0.6mpa.

9. The method of claim 4, wherein, In step four, t1, t2, t3 and t4 are in the range of 0.2s-2s.

10. The method of claim 4, wherein, In step five, the pre-set range of the third gas pressure regulating valve (240) is 0.35mpa-0.6mpa.

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