High-voltage cycle test system

Abstract

The invention relates to the technical field of valve testing, and discloses a high-pressure circulation testing system, which comprises an air pressure mechanism, a water pressure mechanism and a circulation detection mechanism, and is characterized in that the air pressure mechanism, the water pressure mechanism and the circulation detection mechanism are sequentially communicated into a whole; the air pressure mechanism comprises a high-pressure air storage tank. The high-pressure cycle test system solves the problems that in the prior art, a valve life test involved in the whole test system is provided with a plurality of continuous switches, all switches in the test system need to be turned on during water replenishing and boosting, and after the test system is filled with water, workers need to turn off the switches and then boost the pressure of a pipeline; in a multi-frequency test period, the time for completing one time of water injection and pressurization is generally longer than 20-40 minutes, the processes of water drainage, water supplementation and pressurization occupy a large amount of time, and the working efficiency of the valve sealing performance test is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of valve testing, in particular to a high-pressure cycle testing system. Background Art

[0002] Valves are used in various departments of modern industrial production and play an important role in the development of the national economy and the improvement of people's daily life. The pressure test of valves is the most important process to ensure the quality and safety of valves. The sealing and pressure resistance tests of high-pressure valves are aimed at ensuring that the valves can withstand a certain amount of water pressure or air pressure shock and the influence of external environmental changes before use, so that they can operate safely and stably in practical applications.

[0003] In valve testing, the setting and execution of the test system are crucial to the quality and performance of the valve, and are directly related to the service life and safety of the valve. Generally, a water pressure test is used to test the quality of the valve. Before testing the valve, it is necessary to add water and increase the pressure. When testing large-diameter valves, a test pipe that is too thick will also cause a significant increase in the water filling time. In the prior art, the valve life test involved in the entire test system has many continuous switches. When adding water and increasing the pressure, all switches in the test system must be turned on. After the test system is filled with water, the staff must operate to close the switch and then increase the pressure of the pipeline. Subsequently, the water must be drained to release the pressure for a pressure differential test, and the water replenishment and pressure increase process must be repeated to start a periodic pressure differential test. In a multi-frequency test cycle, it usually takes more than 20 to 40 minutes to complete a water injection and pressurization. The process of draining water, replenishing water and increasing pressure will take up a lot of time, reducing the work efficiency of the valve sealing test. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a high-voltage cycle test system to solve the problems mentioned in the above background.

[0005] The present invention provides the following technical solution: a high-pressure circulation test system, comprising: an air pressure mechanism, a water pressure mechanism and a circulation detection mechanism, wherein the air pressure mechanism, the water pressure mechanism and the circulation detection mechanism are sequentially connected to one another;

[0006] The pneumatic mechanism includes a high-pressure gas storage tank, the front of which is connected to a high-pressure air compressor via a pipeline, a high-pressure needle valve 1 and a pressure gauge 1 are respectively installed on the pipeline between the high-pressure air compressor and the high-pressure gas storage tank, a high-pressure amplifier is installed at the rear of the high-pressure gas storage tank via a pipeline, and a high-pressure ball valve 1, a pressure reducing valve 1 and a pressure gauge 2 are sequentially installed on the pipeline between the high-pressure gas storage tank and the high-pressure amplifier;

[0007] The water pressure mechanism includes a pressure reducing valve 2 connected to the high-voltage amplifier by a pipeline, a water pump is connected to the pipeline between the pressure reducing valve 2 and the high-voltage amplifier through a tee pipe, a high-pressure needle valve 3 is installed on the pipeline at the bottom of the water pump, and a pressure gauge 5 is provided on the pipeline between the pressure reducing valve 2 and the high-voltage amplifier;

[0008] The circulation detection mechanism includes a high-pressure ball valve three, a high-test valve body and a needle-shaped solenoid valve which are arranged in series behind the water pressure mechanism through a pipeline. A pressure gauge three is arranged on the pipeline between the high-pressure ball valve three and the high-test valve body, and a pressure gauge four is arranged on the pipeline between the high-test valve body and the needle-shaped solenoid valve.

[0009] Preferably, a filter is installed on the pipeline in front of the high-pressure air compressor, and the filter is located on the air inlet pipeline of the high-pressure air compressor.

[0010] Preferably, a safety relief valve is installed on the pipe at the top of the high-pressure gas storage tank, a high-pressure needle valve 2 is installed on the pipe at the bottom of the high-pressure gas storage tank, and the end of the pipe at the bottom of the high-pressure gas storage tank is connected to the dirt holding mechanism.

[0011] Preferably, a high-pressure ball valve 4 is provided on the pipeline between the pressure gauge 2 and the high-pressure amplifier through a three-way pipe, and the pipeline at the bottom of the high-pressure ball valve 4 is connected to the collection device.

[0012] Preferably, the high-voltage amplifier includes an end shell and a sleeve shell, which are installed as a whole and form a accommodating cavity inside. A piston is slidably arranged in the accommodating cavity. A breathing hole is opened on the sleeve shell, and a reader is slidably arranged inside the breathing hole, and one end of the reader is installed on the piston.

[0013] Preferably, a second high-pressure ball valve is arranged in parallel on the pipelines at both ends of the second pressure reducing valve.

[0014] Preferably, a three-way pipe is used to connect a high-pressure needle valve four to the pipeline between the high-test valve body and the needle solenoid valve, and a pipe at the bottom end of the high-pressure needle valve four is connected to a containing device.

[0015] Preferably, a discharge pipe is installed behind the needle solenoid valve.

[0016] Preferably, the volume of the high-pressure gas storage tank is 1 to 2 m 3 .

[0017] Preferably, the size of the needle-shaped solenoid valve is 1 / 8 inch, and the needle-shaped solenoid valve starts with a delay of 1 to 2 seconds after being powered on.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The high-pressure circulation test system uses the high-pressure gas in the air pressure mechanism to drive the high-pressure amplifier to operate, so that the water entering the high-pressure amplifier is pushed back to the water pressure mechanism and the circulation detection mechanism to achieve the effect of boosting and replenishing water, thereby controlling the pressure in the circulation detection mechanism. At the beginning of the periodic test, the high-pressure amplifier is controlled to operate to boost the pressure and replenish water in the water pressure mechanism and the circulation detection mechanism, and then the needle solenoid valve is used for pressure relief, so that the subsequent periodic test of the circulation test system can complete the boosting, replenishing and pressure relief work of a single cycle test within 15S to 30S. In the face of the multi-cycle circulation test process of the valve, there is no need to spend a lot of time to use the water pump and high-pressure air compressor for replenishing water and pressurizing work during the first test multiple times, which greatly increases the frequency of valve pressure switching and reduces the cycle of valve sealing test. It can be widely used in factories that need to test valves in large quantities, saving staff and test time.

[0020] 2. The high-pressure circulation test system stores high-pressure gas in advance by setting a high-pressure gas storage tank behind the high-pressure air compressor. When the high-pressure gas is needed to push the high-pressure amplifier to provide pressure for the circulation detection mechanism, it is only necessary to control the opening of the high-pressure ball valve 1 and the pressure reducing valve 1. At the same time, by observing the readings on the high-pressure amplifier, the water flow rate pushed out of the high-pressure amplifier is grasped, and the specific test data is obtained by comparing the water flow reading with the water pressure increase data. Finally, according to the high-pressure amplifier readings, the remaining water flow in the circulation test system can be understood to determine whether a water pressure test can be performed again, and whether to use a water pump to replenish water again.

[0021] 3. This high-pressure cycle test system, because the high-pressure air compressor itself needs to provide pressure, when facing the continuous detection of valves, the high-pressure air compressor will cause serious loss when running for a long time, resulting in a significant reduction in its service life. By using a high-pressure gas storage tank to store the high-pressure gas generated by the high-pressure air compressor, the high-pressure gas storage tank becomes a pressure source, which can not only provide air pressure to the high-pressure amplifier for a long time, but also provide sufficient rest time for the high-pressure air compressor. There is no need to start the high-pressure air compressor for a long time, which reduces the working wear of the high-pressure air compressor and increases its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is the overall structural system diagram of the present invention;

[0023] Figure 2 It is a system diagram of the pneumatic mechanism of the present invention;

[0024] Figure 3 It is a schematic diagram of the cross-sectional structure of the high-voltage amplifier of the present invention;

[0025] Figure 4 It is a system diagram of the hydraulic mechanism of the present invention;

[0026] Figure 5 It is a system diagram of the circulation detection mechanism of the present invention.

[0027] In the figure: 1. air pressure mechanism; 2. water pressure mechanism; 3. circulation detection mechanism; 4. high-pressure gas storage tank; 5. high-pressure air compressor; 6. high-pressure amplifier; 61. end shell; 62. sleeve shell; 63. piston; 64. breathing hole; 65. reading device; 7. filter; 8. high-pressure needle valve one; 9. pressure gauge one; 10. safety relief valve; 11. high-pressure needle valve two; 12. high-pressure ball valve one; 13. pressure reducing valve one; 14. pressure gauge two; 15. high-pressure ball valve four; 16. water pump; 17. pressure reducing valve two; 18. high-pressure needle valve three; 19. pressure gauge five; 20. high-pressure ball valve two; 21. high-pressure ball valve three; 22. test valve body; 23. needle solenoid valve; 24. pressure gauge three; 25. pressure gauge four; 26. high-pressure needle valve four. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-5 , a high pressure cycle test system, comprising: an air pressure mechanism 1, a water pressure mechanism 2 and a cycle detection mechanism 3, wherein the air pressure mechanism 1, the water pressure mechanism 2 and the cycle detection mechanism 3 are sequentially connected to one another;

[0030] The pneumatic mechanism 1 includes a high-pressure gas storage tank 4, the front of which is connected to a high-pressure air compressor 5 by a pipeline, a high-pressure needle valve 8 and a pressure gauge 9 are respectively installed on the pipeline between the high-pressure air compressor 5 and the high-pressure gas storage tank 4, a high-pressure amplifier 6 is installed behind the high-pressure gas storage tank 4 through a pipeline, and a high-pressure ball valve 12, a pressure reducing valve 13 and a pressure gauge 14 are installed in sequence on the pipeline between the high-pressure gas storage tank 4 and the high-pressure amplifier 6;

[0031] The hydraulic mechanism 2 includes a pressure reducing valve 2 17 connected to the high-voltage amplifier 6 by a pipeline, a water pump 16 is connected to the pipeline between the pressure reducing valve 2 17 and the high-voltage amplifier 6 through a tee pipe, a high-pressure needle valve 3 18 is installed on the pipeline at the bottom of the water pump 16, and a pressure gauge 5 19 is provided on the pipeline between the pressure reducing valve 2 17 and the high-voltage amplifier 6;

[0032] The circulation detection mechanism 3 includes a high-pressure ball valve 3 21, a high test valve body 22 and a needle solenoid valve 23 which are arranged in series behind the water pressure mechanism 2 through a pipeline. A pressure gauge 3 24 is arranged on the pipeline between the high-pressure ball valve 3 21 and the high test valve body 22, and a pressure gauge 4 25 is arranged on the pipeline between the high test valve body 22 and the needle solenoid valve 23.

[0033] Among them, a filter 7 is installed on the pipe in front of the high-pressure air compressor 5. The filter 7 is located on the air inlet pipe of the high-pressure air compressor 5. By installing the filter 7 at the air inlet of the high-pressure air compressor 5, water vapor and dust mixed in the incoming gas are filtered out to avoid damage to the high-pressure air compressor 5.

[0034] Among them, a safety relief valve 10 is installed on the pipe at the top of the high-pressure gas storage tank 4, a high-pressure needle valve 11 is installed on the pipe at the bottom of the high-pressure gas storage tank 4, and the end of the pipe at the bottom of the high-pressure gas storage tank 4 is connected to the dirt holding mechanism. When the gas pressure in the high-pressure gas storage tank 4 is too high, excess gas is discharged through the safety relief valve 10, so that the high-pressure gas storage tank 4 is in a safe state to avoid explosion.

[0035] Among them, a high-pressure ball valve four 15 is arranged on the pipeline between the pressure gauge two 14 and the high-pressure amplifier 6 through a three-way pipe. By setting the high-pressure ball valve four 15, at the beginning of each cycle, the high-pressure ball valve one 12 is closed, and the high-pressure gas in the air pressure mechanism 1 is discharged by using the high-pressure ball valve four 15, so that the high-pressure amplifier 6 can relieve the pressure in the water pressure mechanism 2, thereby facilitating the subsequent pressure application to give a unified water pressure to the water pressure mechanism 2 and the circulation detection mechanism 3, and recording the pressure difference change during the test.

[0036] Among them, the high-voltage amplifier 6 includes an end shell 61 and a sleeve shell 62, which are installed as a whole and form a accommodating cavity inside. A piston 63 is slidably arranged in the accommodating cavity. A breathing hole 64 is opened on the sleeve shell 62, and a reader 65 is slidably arranged inside the breathing hole 64. One end of the reader 65 is installed on the piston 63. The air pressure mechanism 1 is used to provide sufficient air pressure for the high-pressure gas storage tank 4, and then the thrust provided by the high-pressure gas storage tank 4 to the high-voltage amplifier 6 causes the piston 63 to compress the accommodating cavity, and the water in the accommodating cavity is pushed into the water pressure mechanism 2 and the circulation detection mechanism 3, so that the pressure formed in the water pressure mechanism 2 reaches a predetermined value range, providing pressure for the circulation detection mechanism 3, and completing the air tightness test of the valve. At the same time, the reader 65 displays its position on the outside as the piston 63 moves, which is convenient for the tester to observe.

[0037] Among them, a high-pressure ball valve 20 is arranged in parallel on the pipelines at both ends of the pressure reducing valve 17. The high-pressure ball valve 20 and the pressure reducing valve 17 are used to make the water pressure mechanism 2 have two passages. When the high-pressure gas storage tank 4 provides pressure to control the water pressure, the high-pressure ball valve 20 is closed, and the pressure reducing valve 17 is used to reduce the water pressure entering the circulation detection mechanism 3 to the rated pressure. When it is necessary to start the water pump 16 for water replenishment, the high-pressure ball valve 20 is opened to divert the liquid passing through the pressure reducing valve 17, and quickly fill the pipelines of the water pressure mechanism 2 and the circulation detection mechanism 3 with the replenished water.

[0038] Among them, a high-pressure needle valve four 26 is connected to the pipeline between the high test valve body 22 and the needle solenoid valve 23 through a three-way pipe, and the pipeline at the bottom of the high-pressure needle valve four 26 is connected to a containing device. When water is added to the circulation detection mechanism 3, the water flow gushing out of the high-pressure needle valve four 26 is used to observe whether there is gas mixed in the pipeline, and it is closed 1 to 2 seconds after the outlet water flow is stable, thereby ensuring that the circulation detection mechanism 3 has a stable water pressure during testing to avoid the occurrence of bubbles affecting the water pressure.

[0039] Among them, a discharge pipe is installed behind the needle solenoid valve 23. When performing periodic cycle detection, the needle solenoid valve 23 is used to release the water pressure behind the test valve body 22, forming a pressure difference with the front thereof. The readings of pressure gauge three 24 and pressure gauge four 25 are used to judge the impact of the water pressure on the test valve body 22.

[0040] Among them, the volume of the high-pressure gas storage tank 4 is 1 to 2 m 3 , input 5.5Mpa of gas into the high-pressure gas storage tank 4 in the predetermined space, so that the air pressure mechanism 1 has sufficient water outlet pressure to drive the high-voltage amplifier 6, and use the high-voltage amplifier 6 to increase the pressure in the pipelines of the water pressure mechanism 2 and the circulation detection mechanism 3, so that the water pressure reaches the rated range and keeps the high-voltage amplifier 6 balanced.

[0041] Among them, the size of the needle solenoid valve 23 is 1 / 8 inch, and the needle solenoid valve 23 is powered on with a delay of 1 to 2 seconds to start. The size and model of the needle solenoid valve 23 are controlled so that when the circulation detection mechanism 3 drains water, the discharged water flow is within a predetermined range, and only the water pressure can be relieved, and the pressureless water flow in the pipeline will not be discharged. Then, the inertia power-on delay setting of the needle solenoid valve 23 is used to make the pressure gauge three 24 return to zero and stabilize before it can be completely closed, so as to detect the sealing performance under the pressure difference on both sides of the test valve body 22.

[0042] The high-voltage cycle test system operation process includes the following steps:

[0043] S1: Inflate, open the high-pressure air compressor 5, input 0.6Mpa compressed air, output 5.5Mpa compressed air, open the high-pressure needle valve 18, close the high-pressure needle valve 2 11 and the high-pressure ball valve 12, input 5.5Mpa gas into the high-pressure gas storage tank 4, and after the pressure of the high-pressure gas storage tank 4 rises to 5.5MPa, the high-pressure air compressor 5 stops working and closes the high-pressure needle valve 18;

[0044] S2 adds water, opens the high-pressure ball valve 4 15, high-pressure needle valve 3 18, high-pressure ball valve 2 20, high-pressure ball valve 3 21, test valve body 22, high-pressure needle valve 4 26 in sequence, and finally opens the water pump 16 to supply water, and fills the water into the pipelines of the hydraulic mechanism 2 and the circulation detection mechanism 3 with the water flow. After it is full, check the outlet of the high-pressure needle valve 4 26. When draining or when there is no mixed gas discharged, wait for 3 to 5 seconds to close the high-pressure needle valve 4 26, and then check the high-pressure amplifier 6 until the water pressure pushes the reader 65 back to zero, and then close the high-pressure needle valve 3 18, high-pressure ball valve 4 15, and high-pressure ball valve 2 20 in sequence;

[0045] S3 pressurization, open the high-pressure ball valve 12, adjust the pressure reducing valve 13, provide the required outlet pressure P1, the P1 air pressure passes through the high-pressure amplifier 6, presses the water entering the high-pressure amplifier 6 back to the pipeline of the water pressure mechanism 2 to increase the water pressure P2, passes through the pressure reducing valve 2 17, reduces the water pressure to the rated pressure P, closes the high-pressure ball valve 3 21, and closes the test valve body 22;

[0046] The pressure balance of piston 63 satisfies: SA*P1=SB*P2

[0047] SA=N1*SB

[0048] , where A is the design given data, N1 is the magnification (design given data), and B is the design given data;

[0049] S4 forms a pressure difference to act as a pressure switch, and opens the needle solenoid valve 23 (1 / 8 inch) by powering on, and discharges the excess water pressure behind the test valve body 22. The reading of the pressure gauge 4 25 drops to zero. Wait for 3 to 5 seconds, open the test valve body 22, and the reading of the pressure gauge 3 24 drops from P to zero as the water pressure is discharged. The needle solenoid valve 23 (1 / 8 inch) is closed after a delay of 1 to 2 seconds.

[0050] S5 pressure cycle and water replenishment, open the high-pressure ball valve 12, the piston 63 inside the high-pressure amplifier 6 automatically moves to compensate for the volume V1 of the water, the reading of the pressure gauge 3 24 rises to P, the reading of the pressure gauge 4 25 rises to P, close the high-pressure ball valve 3 21 in turn, test the valve body 22, and start the cycle of step S4 until the position reading N2 appears;

[0051] Assuming that water is incompressible: after the needle solenoid valve 23 is opened, the displacement V1 = SB*L2', where L2' is the design given data,

[0052] L2'*N2<L2, L2 is the design given data, N2 is the reader 65 data;

[0053] S6 replenishes water, and operates in sequence: close the high-pressure ball valve 12, open the high-pressure ball valve 4 15, beat the pressure in the high-pressure amplifier 6, open the high-pressure ball valve 20, open the high-pressure needle valve 4 26, open the high-pressure needle valve 3 18, open the water pump 16 to replenish water, check that the outlet water flow of the high-pressure needle valve 4 26 is stable, and then close it after 1 to 2 seconds;

[0054] After the water replenishment in S7 is completed, the pressure difference can be formed from the cycle step S4 to make a pressure switch, until the cumulative pressure difference switch given by the design is reached, the cycle test of 100% rated pressure difference is completed, the torque is tested, and all data are recorded;

[0055] Among them, the 0.6MPa gas source pressure of the production system is increased to 5.5MPa through the high-pressure air compressor 5, and the 5.5MPa pressure is added to the high-pressure gas storage tank 4 (used as a high-pressure gas source);

[0056] The high-voltage amplifier 6 enters a gas pressure of 5MPa. According to the design, the pressure at the outlet can be increased by N times, and the design is given (generally it can reach 5 to 10 times, the maximum pressure level of the valve is 2500LB, and the pressure required for the cycle test pressure is 43.8MPa) to increase the pressure;

[0057] Automatic water replenishment in cycle test: 1 / 8 needle solenoid valve 23 delays 1 to 2 seconds to close the sprayed water volume of about 100Ml each time, and the high-voltage amplifier 6 moves toward the water side once each time, and the moving length is designed to be given: SB*moving distance=100Ml.

[0058] 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. High-voltage cycle test system, characterized in that: include: A pneumatic mechanism (1), a hydraulic mechanism (2) and a circulation detection mechanism (3), wherein the pneumatic mechanism (1), the hydraulic mechanism (2) and the circulation detection mechanism (3) are sequentially connected to form a whole; The pneumatic mechanism (1) comprises a high-pressure gas storage tank (4), the front of the high-pressure gas storage tank (4) is connected to a high-pressure air compressor (5) via a pipeline, a high-pressure needle valve (8) and a pressure gauge (9) are respectively installed on the pipeline between the high-pressure air compressor (5) and the high-pressure gas storage tank (4), a high-pressure amplifier (6) is installed at the rear of the high-pressure gas storage tank (4) via a pipeline, and a high-pressure ball valve (12), a pressure reducing valve (13) and a pressure gauge (14) are installed in sequence on the pipeline between the high-pressure gas storage tank (4) and the high-pressure amplifier (6); The water pressure mechanism (2) comprises a second pressure reducing valve (17) connected to a high-pressure amplifier (6) via a pipeline, a water pump (16) is connected to the pipeline between the second pressure reducing valve (17) and the high-pressure amplifier (6) via a three-way pipe, a high-pressure needle valve (18) is installed on the pipeline at the bottom of the water pump (16), and a pressure gauge (19) is provided on the pipeline between the second pressure reducing valve (17) and the high-pressure amplifier (6); The circulation detection mechanism (3) comprises a high-pressure ball valve (21), a high-pressure test valve body (22) and a needle-shaped solenoid valve (23) which are arranged in series behind the water pressure mechanism (2) through a pipeline; a pressure gauge (24) is arranged on the pipeline between the high-pressure ball valve (21) and the high-pressure test valve body (22); and a pressure gauge (25) is arranged on the pipeline between the high-pressure test valve body (22) and the needle-shaped solenoid valve (23).

2. The high-voltage cycle test system according to claim 1, characterized in that: A filter (7) is installed on the pipeline in front of the high-pressure air compressor (5), and the filter (7) is located on the air inlet pipeline of the high-pressure air compressor (5).

3. The high-voltage cycle test system according to claim 1, characterized in that: A safety relief valve (10) is installed on the pipeline at the top of the high-pressure gas storage tank (4), a high-pressure needle valve 2 (11) is installed on the pipeline at the bottom of the high-pressure gas storage tank (4), and the end of the pipeline at the bottom of the high-pressure gas storage tank (4) is connected to the dirt holding mechanism.

4. The high-voltage cycle test system according to claim 1, characterized in that: A high-pressure ball valve four (15) is provided on the pipeline between the pressure gauge two (14) and the high-pressure amplifier (6) via a three-way pipe, and the pipeline at the bottom of the high-pressure ball valve four (15) is connected to the collection device.

5. The high-voltage cycle test system according to claim 1, characterized in that: The high-voltage amplifier (6) comprises an end shell (61) and a sleeve shell (62), wherein the end shell (61) and the sleeve shell (62) are mounted together and form a receiving cavity inside, wherein a piston (63) is slidably arranged in the receiving cavity, a breathing hole (64) is opened on the sleeve shell (62), a reader (65) is slidably arranged inside the breathing hole (64), and one end of the reader (65) is mounted on the piston (63).

6. The high-voltage cycle test system according to claim 1, characterized in that: A high-pressure ball valve (20) is arranged in parallel on the pipelines at both ends of the second pressure reducing valve (17) by using a three-way pipe to divide the flow.

7. The high-voltage cycle test system according to claim 1, characterized in that: The pipeline between the high test valve body (22) and the needle electromagnetic valve (23) is connected to a high pressure needle valve four (26) through a three-way pipe, and the pipeline at the bottom end of the high pressure needle valve four (26) is connected to a containing device.

8. The high-voltage cycle test system according to claim 1, characterized in that: A discharge pipeline is installed behind the needle-shaped solenoid valve (23).

9. The high-voltage cycle test system according to claim 1, characterized in that: The volume of the high-pressure gas storage tank (4) is 1 to 2 m 3 .

10. The high-voltage cycle test system according to claim 1, characterized in that: The size of the needle-shaped solenoid valve (23) is 1 / 8 inch, and the needle-shaped solenoid valve (23) starts after a delay of 1 to 2 seconds when it is powered on.

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