Single-pipeline vacuum high-voltage ignition test system and test method thereof

Abstract

The present invention discloses a single-pipeline vacuum high-voltage ignition test system and a test method thereof, which comprises a vacuum tank test environment module, an air intake pipeline module and a vacuum acquisition module. The vacuum tank test environment module comprises a vacuum tank, a power supply interface to be tested is provided on the vacuum tank to connect the power supply to be tested or the device to be tested, and a vacuum extraction port is provided on each vacuum tank to obtain a vacuum environment. Each vacuum tank is also equipped with an air intake assembly, which is sealed and inserted into the vacuum tank to input gas to locally destroy the vacuum. The position of the gas outlet of the air intake assembly in the vacuum tank is adjustable. The present invention can realize the adjustment of the air intake position during the test process, and has high working efficiency.

Description

Technical Field

[0001] The invention relates to the field of high voltage electrical technology, and in particular to a single-pipeline vacuum high voltage ignition test system and a test method thereof. Background Art

[0002] High-voltage electrical equipment is electrical equipment that operates under high-voltage conditions. One type of high-voltage electrical equipment is used in a high-vacuum environment. In actual application and production, it is necessary to test its various performance parameters and anti-spark interference performance when ignited under high vacuum.

[0003] The vacuum high-voltage ignition test in the prior art is completed in a vacuum tank, which is connected to a vacuum pumping pipeline and an air intake pipeline. The air intake pipeline inputs gas into the vacuum tank through an air intake assembly to partially expose the vacuum tank to test various properties of high-voltage electrical equipment. The air intake volume in the existing test system is inconvenient to adjust, and the air intake flow cannot be precisely controlled, and the impact of different flow or pulse flow gases on high-voltage ignition cannot be tested.

[0004] In addition, the ignition position and air intake point must be adjusted manually every time, which requires a process: experiment → result → vacuum exposure → open the vacuum tank to adjust the vacuum exposure point → adjust the nearest metal position → close the vacuum tank → vacuum → experiment. This process takes 20 minutes to vacuumize, and a single adjustment takes more than half an hour, wasting manpower and material resources. Summary of the invention

[0005] The purpose of the present invention is to provide a single-pipeline vacuum high-voltage ignition test system to solve the problem that the vacuum high-voltage ignition test system in the prior art is inconvenient to adjust.

[0006] Another object of the present invention is to provide a testing method for the single-line vacuum high-voltage ignition testing system.

[0007] The technical solution adopted to achieve the purpose of the present invention is:

[0008] A single-pipeline vacuum high-pressure ignition test system includes a vacuum tank test environment module, an air intake pipeline module and a vacuum acquisition module.

[0009] The vacuum tank test environment module includes a vacuum tank, the vacuum tank is provided with a power supply interface to be connected to the power supply or device to be tested, each vacuum tank is provided with a vacuum port to obtain a vacuum environment, and each vacuum tank is also equipped with an air intake assembly, the air intake assembly is sealed and inserted into the vacuum tank to input gas to partially destroy the vacuum;

[0010] The air intake pipeline module includes an air intake pipeline and an air intake stop valve, a pressure sensor and a gas mass flow controller mounted on the air intake pipeline; the air intake pipeline is connected to the air intake port of the air intake component,

[0011] The vacuum obtaining module comprises a vacuum obtaining pipeline connected to the vacuum extraction port, an air extraction control valve arranged on the vacuum obtaining pipeline, a vacuum gauge and a vacuum extraction pump connected to the vacuum obtaining pipeline.

[0012] In the above technical solution, the air intake assembly is an air intake pipe sealed and fixed on the vacuum tank body, the gas outlet is a narrow hole formed at the end of the air intake pipe, and the position of the gas outlet in the vacuum tank body is fixed.

[0013] In the above technical solution, the gas outlet position of the air intake assembly is adjustable, a tank flange is welded to the bottom of the vacuum tank, and the air intake assembly includes a tank adapter flange for sealing and fixedly connecting with the tank flange, a screw seat with one end inserted into the tank adapter flange and sealed with the tank adapter flange, a screw connected to the screw seat by threads, and a magnet drive assembly for adjusting the position of the screw, and the screw seat is fixedly connected to the tank adapter flange by a fixing member, wherein:

[0014] The screw is hollow inside, one end of the screw extends into the vacuum tank to form a gas outlet, and the other end is inserted into the screw seat and forms a threaded connection with the internal thread of the screw seat, a sliding sealing ring is embedded at the end of the screw seat to seal the screw, and an air intake passage is formed at the outer end of the screw seat, and the air intake passage is connected to the hollow channel inside the screw;

[0015] The magnet driving assembly includes a first magnet block fixed on the screw rod and a second magnet block adsorbed on the outside of the tank body adapter flange. The first magnet block and the second magnet block are arranged relative to each other inside and outside to form a follow-up motion.

[0016] In the above technical solution, the gas outlet of the screw is a narrow hole formed at the end of the screw.

[0017] In the above technical solution, a tool contact surface is provided on the side wall of the screw near the gas outlet.

[0018] In the above technical solution, a static sealing ring is embedded on the outer flange of the screw seat to press the outer flange of the tank adapter flange to form a seal. Preferably, an embedding groove is provided in the screw seat, and the static sealing ring is assembled in the embedding groove.

[0019] In the above technical solution, the first magnet block is fixed to one side of the edge of the screw rod by using a metal adhesive, and the second magnet block is placed on the outside of the tank body adapter flange.

[0020] In the above technical solution, the tank body adapter flange, the screw seat and the screw are coaxially arranged.

[0021] In the above technical solution, the hollow channel in the screw seat is a stepped channel, the internal thread is formed in the minimum diameter section of the stepped channel, and the end of the screw seat is an air inlet pipe section connection end for connecting an external pipe.

[0022] In the above technical solution, the fixing member is a clamp, and the screw seat and the tank body adapter flange are fixedly connected via the clamp.

[0023] In the above technical solution, the screw seat is provided with a standard KF25, KF40 or KF16 interface for docking with the tank adapter flange, and the static sealing ring is a KF25, KF40 or KF16 flange static sealing ring; the structural form of the tank flange is one of the CF / LF / KF flange forms, and the tank adapter flange and the tank flange are sealed and welded to form a whole and fixed under the tank body.

[0024] In the above technical solution, the tested power supply interface is arranged at the top of the vacuum tank body, the gas input port is arranged at the bottom of the vacuum tank body, and the vacuum port is arranged at the side of the vacuum tank body.

[0025] In the above technical solution, the air extraction control valve is an air extraction butterfly valve, the vacuum pump includes a mechanical pump and a molecular pump, the diameter of the vacuum acquisition tube is 140-200 mm, preferably 160 mm, the air intake pipeline is a stainless steel pipeline with a diameter of 3-6 mm, and the air intake stop valve is a small flow electromagnetic stop valve.

[0026] In the above technical solution, the vacuum high-voltage ignition test device also includes an electrical control module, which includes a human-computer interaction unit, an embedded control circuit unit and a power supply unit. The embedded control circuit unit is respectively communicatively connected with the human-computer interaction unit, the air intake shut-off valve, the pressure sensor, the gas mass flow controller, the exhaust control valve, the vacuum gauge and the controller of the vacuum pump.

[0027] In the above technical solution, the vacuum high-pressure ignition test device also includes a support structure, casters are provided at the bottom of the support structure, the vacuum tank body is fixed to the top of the support structure, the vacuum pump is fixed to the lower part of the support structure, and the air intake stop valve, pressure sensor and gas mass flow controller are fixed on the positioning plate in the middle of the support structure.

[0028] In another aspect of the present invention, the testing method of the single-pipeline vacuum high-voltage ignition testing system comprises the following steps:

[0029] Close the small flow stop valve, start the vacuum pump, open the vacuum control valve, and reduce the vacuum degree to 10 -4Stop the vacuum pump after Pa, open the small flow stop valve, pass the set flow of gas, and observe whether vacuum ignition can be achieved in the vacuum tank to test the power supply characteristics, or use the air intake pipeline to control the flow into a step pulse flow, and achieve uninterrupted and highly repeatable supply of micro-flow pulse gas to test various performance parameters of the high-voltage power supply when it continuously ignites under high vacuum.

[0030] In the above technical solution, when the gas outlet position of the air intake assembly is adjustable, it is adjusted through the following steps: the gas enters through the air intake passage of the screw seat, passes through the hollow channel of the screw, and enters the vacuum tank body from the gas outlet of the screw, and is partially exposed to vacuum. When the second magnet block is rotated outside the screw seat, the first magnet block rotates with it, driving the screw to rotate inside the screw seat. At the same time, the screw performs axial linear motion. As the screw advances and retreats, the position of the gas outlet in the vacuum tank body is adjusted.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. Through the setting of the air intake component, the device can complete the adjustment of the air intake point without destroying the vacuum environment of the tank, that is, the adjustment of the air intake point is completed during the working process, which greatly improves the working efficiency.

[0033] 2. In order to dynamically adjust the ignition discharge position without affecting the vacuum degree, the present invention uses a strong magnet as the traction force for the rotation of the screw, and uses the second magnet block outside the vacuum tank body and the first magnet block on the internal screw for traction, so that the screw moves along the axial direction of the screw, so as to adjust the air intake position at any time during work. The air intake assembly of the present invention has good guiding performance: due to the tightening effect of the threaded connection and the sliding sealing ring, under the condition of ensuring the processing accuracy, the present invention can ensure a slight movement in the radial direction of the screw, and precisely adjust the position of the local ignition area. The smaller the pitch of the thread, the more precise the axial movement position. The specific relative displacement can be obtained by using the pitch size of the screw processing and the number of turns of the magnet rotation, so as to accurately calculate the ignition discharge position, realize precise adjustment of the air intake position, and realize that the vacuum tank can adjust the air intake position at any time in the working state without being exposed to air, thereby reducing the time consumed by a single adjustment and improving the test efficiency. The air intake assembly of the present invention has good sealing performance: the sliding seal ring is located inside the vacuum, so there is no possibility of external leakage. The sliding seal ring ensures that the incoming gas has a unique outlet when the screw height is dynamically adjusted, so as to ensure the effective change of the vacuum degree of a specific local area in the vacuum tank. The overall adjustment mechanism is within the sealing point, which is convenient for the assembly and sealing of each component.

[0034] 3. This device can be used to test the ignition of high-voltage electrical equipment (high-voltage power supply) when a certain fixed flow of gas is input, and can also use the intake pipeline to control the flow into a step pulse flow, and realize the uninterrupted and highly repeatable supply of micro-flow pulse gas to test the various performance parameters of the high-voltage power supply when it is continuously ignited under high vacuum. The device reduces the vacuum degree to 10 -4 After Pa, the air intake pipeline flow is precisely controlled to be delivered into the vacuum tank to destroy the local vacuum. When the power supply is working normally, the user can also precisely control the ignition time by entering the ignition interval time in the human-computer interaction unit in the control module. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Shown is a schematic structural diagram of a vacuum high-voltage ignition test device.

[0036] Figure 2 Shown is a schematic diagram of the location structure of the gas outlet in the vacuum tank.

[0037] Figure 3 It is the schematic diagram of the vacuum high-voltage ignition test device.

[0038] Figure 4 It is a schematic diagram of the assembly structure of the intake component.

[0039] Figure 5 It is a schematic diagram of the unassembled structure of the intake assembly.

[0040] Figure 6 This is the front view of the air intake assembly.

[0041] Figure 7 It is a schematic diagram of the structure of the vacuum tank (the first magnet block and the second magnet block are omitted).

[0042] In the figure: 1-tank flange, 2-tank adapter flange, 3-1-first magnet block, 3-2-second magnet block, 4-sliding sealing ring, 5-static sealing ring, 6-screw seat, 7-screw, 8-vacuum tank, 9-test power interface, 10-air intake assembly, 11-air intake pipeline, 12-air intake stop valve, 13-gas mass flow controller, 14-vacuum acquisition pipeline, 15-exhaust control valve, 16-vacuum gauge, 17-mechanical pump, 18-molecular pump, 19-bracket structure, 20-castors, 21-human-computer interaction unit, 22-embedded control circuit unit, 23-molecular pump controller.

[0043] 6-1-air inlet passage, 6-2-air inlet pipe section connection end, 7-1-gas outlet, 7-2-tool contact surface. DETAILED DESCRIPTION

[0044] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0045] Example 1

[0046] A vacuum high-pressure ignition test device with adjustable air intake position, comprising a vacuum tank test environment module, an air intake pipeline module and a vacuum acquisition module.

[0047] The vacuum tank test environment module comprises a vacuum tank 8, on which a power supply interface 9 is provided to be connected to the power supply or device to be tested, and each vacuum tank 8 is provided with a vacuum port to obtain a vacuum environment, and each vacuum tank 8 is also equipped with an air intake assembly 10, which is sealed and inserted into the vacuum tank 8 to input gas to partially destroy the vacuum;

[0048] The air intake pipeline module includes an air intake pipeline 11 and an air intake stop valve 12, a pressure sensor and a gas mass flow controller 13 mounted on the air intake pipeline 11; the air intake pipeline 11 is connected to the air inlet of the air intake component 10,

[0049] The vacuum obtaining module includes a vacuum obtaining pipeline 14 connected to the vacuum extraction port, an exhaust control valve 15 arranged on the vacuum obtaining pipeline 14 , a vacuum gauge 16 , and a vacuum pump connected to the vacuum obtaining pipeline 14 .

[0050] The gas outlet of the air inlet assembly is very close to the power electrode under test. When in use, close the small flow stop valve, start the vacuum pump, open the air extraction control valve 15, and the vacuum degree drops to 10 -4 After Pa, stop the vacuum pump, open the small flow stop valve, and introduce the gas with the set flow rate to see whether vacuum ignition can be achieved in the vacuum tank 8, so as to test the power supply characteristics.

[0051] In addition, the intake pipeline can be used to control the flow into a step pulse flow, and to achieve uninterrupted and highly repeatable supply of micro-flow pulse gas to test various performance parameters of the high-voltage power supply when it is continuously ignited under high vacuum.

[0052] Example 2

[0053] Based on Example 1, the air intake assembly is described in detail.

[0054] The air intake assembly 10 can be an air intake pipe sealed and fixed on the vacuum tank body 8, and the gas outlet position at the end of the air intake pipe is fixed. The gas outlet is a narrow hole formed at the end of the air intake pipe, and the position of the gas outlet in the vacuum tank body is fixed.

[0055] More preferably, the gas outlet position of the air intake assembly 10 is adjustable, the position of the air intake assembly is adjustable, and the air intake assembly includes a tank body adapter flange 2 for sealing and fixed connection with the vacuum tank body, a screw seat 6 with one end inserted into the tank body adapter flange 2 and capable of forming a sealed and fixed connection with the tank body adapter flange 2, a screw 7 connected to the screw seat 6 by threads, and a magnet drive assembly for adjusting the position of the screw 7, wherein:

[0056] The screw 7 is hollow inside, one end of the screw 7 extends into the vacuum tank to form a gas outlet 7-1, and the other end is inserted into the screw seat 6 and is threadedly connected with the internal thread of the screw seat 6. A sliding sealing ring 4 is embedded at the end of the screw seat 6 to seal the screw 7. An air intake passage 6-1 is formed at the outer end of the screw seat 6, and the air intake passage is connected to the hollow channel inside the screw 7;

[0057] The magnet drive assembly includes a first magnet block 3-1 fixed on the screw rod 7 and a second magnet block 3-2 adsorbed on the outside of the tank adapter flange 2. The first magnet block 3-1 and the second magnet block 3-2 are relatively arranged inside and outside to form a follow-up motion.

[0058] The positioning and adjusting method of the air intake assembly as described in Example 1 comprises the following steps:

[0059] Positioning method: the tank body adapter flange 2 is welded to the tank body flange 1 of the vacuum tank body, and when in use, silicone grease or fluoro grease is applied to the position of the sliding sealing ring 4 to reduce friction, the screw seat 6 and the screw 7 are pre-assembled into an integrated structure in the form of a thread, the pre-assembled integrated structure is inserted into the tank body adapter flange 2, and the screw seat 6 is fixed to the tank body adapter flange 2;

[0060] Adjustment method: gas is introduced through the air inlet passage of the screw seat 6, passes through the hollow channel of the screw 7, and enters the vacuum tank body from the gas outlet 7-1 of the screw 7, and is partially exposed to vacuum. When the second magnet block 3-2 is rotated outside the screw seat 6, the first magnet block 3-1 rotates with it, driving the screw 7 to rotate inside the screw seat 6. At the same time, the screw 7 performs axial linear motion. While the screw 7 advances and retreats, the position of the gas outlet 7-1 in the vacuum tank body is adjusted.

[0061] Preferably, the gas outlet 7-1 of the screw 7 is a narrow hole formed at the end of the screw 7, and a tool contact surface 7-2 is provided on the side wall of the screw 7 near the gas outlet 7-1 to facilitate assembly of the screw 7 using tools.

[0062] Preferably, a static sealing ring 5 is embedded on the outer flange of the screw seat 6 to press the outer flange of the tank body adapter flange 2 to form a seal. When the integrated structure is inserted into the tank body adapter flange 2, under the action of the static sealing ring 5, a seal is formed between the screw seat 6 and the tank body adapter flange 2.

[0063] Preferably, the first magnet block 3-1 is fixed to one side of the edge of the screw 7 with a metal adhesive, and the second magnet block 3-2 is placed on the outside of the tank adapter flange 2. The two are attracted to each other, and the second magnet block 3-2 can be used to drive the first magnet block 3-1 to rotate, and the circular motion outside the vacuum is converted into axial motion of the screw 7 by utilizing the threaded connection between the screw 7 and the screw seat 6.

[0064] Preferably, the tank body adapter flange 2, the screw seat 6 and the screw 7 are coaxially arranged to facilitate assembly and improve sealing.

[0065] Preferably, an embedding groove is provided in the screw seat 6, and the static seal ring 5 is assembled in the embedding groove. The hollow channel in the screw seat 6 is a stepped channel, and the internal thread is formed in the minimum diameter section 6-3 of the stepped channel, which has an anti-jamming function.

[0066] Preferably, the end of the screw seat 6 is an air inlet pipe section connection end 6-2 for connecting an external pipeline. The screw seat 6 is fixedly connected to the tank body adapter flange 2 by a clamp. Furthermore, the outer flange of the screw seat 6 is fixed to the outer flange of the tank body adapter flange 2 by a clamp (stainless steel ferrule), and the clamp is omitted in the figure. The screw seat 6 is provided with a standard KF25, KF40 or KF16 interface to dock with the tank body adapter flange 2. The static sealing ring 5 is a KF25, KF40 or KF16 flange static sealing ring, which is convenient for sealing with the tank body adapter flange 2.

[0067] Example 3

[0068] As a preferred embodiment, the tested power supply interface is arranged at the top of the vacuum tank body 8, the gas input port is arranged at the bottom of the vacuum tank body 8, and the vacuum port is arranged on the side of the vacuum tank body 8.

[0069] As a preferred embodiment, the exhaust control valve 15 is an exhaust butterfly valve, and the vacuum pump includes a mechanical pump 17 and a molecular pump 18. The molecular pump 18 is controlled by a molecular pump controller 23. The vacuum system is directly related to the diameter and pumping speed of the vacuum obtaining pipeline 14. Therefore, the vacuum obtaining pipeline 14 with a diameter of 160 mm is selected in this system. When vacuuming, the mechanical pump 17 performs pre-extraction and the molecular pump 18 performs secondary pumping for high vacuum. The pumping speed of the molecular pump 18 is 160 L / S, and the pumping speed of the mechanical pump 17 is 2 L / S. The ultimate vacuum reaches 1×10 within 20 minutes.-4 Pa.

[0070] As a preferred embodiment, the exhaust butterfly valve is connected between the vacuum port and the vacuum obtaining pipeline 14 through a flange O-ring seal, the vacuum gauge 16 is connected to the vacuum tank 8 or the vacuum obtaining pipeline 14 through a KF flange seal, and the vacuum obtaining pipeline 14 is assembled through a CF high vacuum flange. After testing, the vacuum degree can reach 10 -4 Pa.

[0071] Preferably, the flow rate of the small flow stop valve is less than 10SLM. Since a small amount of gas entering under high vacuum will cause a large fluctuation in the vacuum, according to the power supply test requirements, the intake flow rate cannot exceed 10SCCM. Therefore, the pipeline selected for the intake pipeline 11 is a 3 or 6 mm stainless steel pipeline (preferably 316L stainless steel, and the helium mass spectrometer leak detection reaches 10 after the pipeline is sealed). -8 sccsHe), according to the flow capacity, the air inlet stop valve 12 uses a small flow electromagnetic stop valve, and the gas mass flow controller 13 uses a full-scale 10SCCM product to precisely control the gas.

[0072] As a preferred method, the vacuum high-voltage ignition test device also includes an electrical control module, which includes a human-computer interaction unit 21, an embedded control circuit unit 22 and a power supply unit. The embedded control circuit unit is respectively connected to the human-computer interaction unit, the air intake stop valve 12, the pressure sensor, the gas mass flow controller 13, the exhaust control valve 15, the vacuum gauge 16 and the controller of the vacuum pump. In order to realize the control of gas flow, the control of the solenoid valve switch, the control of the vacuum equipment, the reading of the vacuum degree, the real-time data can be recorded and saved in a document format that can be opened by EXCEL. When the flow is out of control or leaking, an abnormal alarm is generated. In addition, the system can allow the user to manually set the vacuum degree and the valve opening time to achieve precise automatic control of the vacuum degree. On this basis, the system can also be programmed using configuration software to facilitate user operation.

[0073] As a preferred embodiment, the vacuum high-voltage ignition test device further includes a support structure 19, a caster 20 is provided at the bottom of the support structure 19, the vacuum tank 8 is fixed to the top of the support structure 19, the vacuum pump is fixed to the lower part of the support structure 19, and the air intake stop valve 12, the pressure sensor and the gas mass flow controller 13 are fixed to the positioning plate in the middle of the support structure 19. Ensure the stability of the entire device and the stability of the fixing of each component. The support structure 19 is built with 40 profiles as a whole, weighing 500KG, which is strong and durable, can absorb the vibration generated by the pump group for a long time, and does not interfere with the flow control part.

[0074] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0075] Furthermore, relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0076] The above description is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the scope of protection of the present invention.

Claims

1. A single-pipeline vacuum high-voltage ignition test system, characterized in that: It includes vacuum tank test environment module, air intake pipeline module and vacuum acquisition module. The vacuum tank test environment module includes a vacuum tank, the vacuum tank is provided with a power interface to be tested to connect the device to be tested, each vacuum tank is provided with a vacuum port to obtain a vacuum environment, and each vacuum tank is also equipped with an air intake assembly, the air intake assembly is sealed and inserted into the vacuum tank to input gas to partially destroy the vacuum; The air intake pipeline module includes an air intake pipeline and an air intake stop valve, a pressure sensor and a gas mass flow controller mounted on the air intake pipeline; the air intake pipeline is connected to the air intake port of the air intake component, The vacuum obtaining module comprises a vacuum obtaining pipeline connected to the vacuum extraction port, an air extraction control valve arranged on the vacuum obtaining pipeline, a vacuum gauge and a vacuum pump connected to the vacuum obtaining pipeline; The gas outlet position of the air intake assembly is adjustable, a tank flange is welded at the bottom of the vacuum tank, and the air intake assembly includes a tank adapter flange for sealing and fixedly connecting with the tank flange, a screw seat with one end inserted into the tank adapter flange and sealed with the tank adapter flange, a screw connected to the screw seat by threads, and a magnet drive assembly for adjusting the position of the screw, wherein the screw seat is fixedly connected to the tank adapter flange by a fixing member, wherein: The screw is hollow inside, one end of the screw extends into the vacuum tank to form a gas outlet, and the other end is inserted into the screw seat and forms a threaded connection with the internal thread of the screw seat, a sliding sealing ring is embedded at the end of the screw seat to seal the screw, and an air intake passage is formed at the outer end of the screw seat, and the air intake passage is connected to the hollow channel inside the screw; The magnet drive assembly includes a first magnet block fixed on the screw rod and a second magnet block adsorbed on the outside of the tank adapter flange, and the first magnet block and the second magnet block are arranged relative to each other inside and outside to form a follower; The air intake assembly is an air intake pipe sealed and fixed on the vacuum tank body, the gas outlet is a narrow hole formed at the end of the air intake pipe, and the position of the gas outlet in the vacuum tank body is fixed.

2. The single-pipeline vacuum high-voltage ignition test system according to claim 1, characterized in that: The gas outlet of the screw is a narrow hole formed at the end of the screw.

3. The single-pipeline vacuum high-voltage ignition test system according to claim 1, characterized in that: A tool contact surface is provided on the side wall of the screw near the gas outlet.

4. The single-pipeline vacuum high-voltage ignition test system according to claim 1, characterized in that: A static sealing ring is embedded on the outer flange of the screw seat to press the outer flange of the tank adapter flange to form a seal. An embedding groove is provided in the screw seat, and the static sealing ring is assembled in the embedding groove.

5. The single-pipeline vacuum high-voltage ignition test system according to claim 1, characterized in that: The first magnet block is fixed to one side of the edge of the screw rod by using a metal adhesive, and the second magnet block is placed on the outer side of the tank body transfer flange.

6. The single-pipeline vacuum high-voltage ignition test system according to claim 1, characterized in that: The tank body adapter flange, the screw seat and the screw are coaxially arranged.

7. The single-pipeline vacuum high-voltage ignition test system according to claim 1, characterized in that: The hollow passage in the screw seat is a stepped passage, the internal thread is formed in the minimum diameter section of the stepped passage, and the end of the screw seat is an air intake pipe section connection end for connecting an external pipe.

8. The single-pipeline vacuum high-voltage ignition test system according to claim 1, characterized in that: The fixing member is a clamp, and the screw seat and the tank body adapter flange are fixedly connected via the clamp.

9. The single-pipeline vacuum high-voltage ignition test system according to claim 4, characterized in that: The screw seat is provided with a standard KF25, KF40 or KF16 interface for docking with the tank body adapter flange, and the static sealing ring is a KF25, KF40 or KF16 flange static sealing ring; the structural form of the tank body flange is one of the CF / LF / KF flange forms, and the tank body adapter flange and the tank body flange are sealed and welded to form a whole and fixed under the tank body.

10. The single-pipeline vacuum high-voltage ignition test system according to claim 1, characterized in that: The tested power supply interface is arranged at the top of the vacuum tank body, the air inlet is arranged at the bottom of the vacuum tank body, and the vacuum port is arranged at the side of the vacuum tank body.

11. The single-pipeline vacuum high-voltage ignition test system according to claim 1, characterized in that: The exhaust control valve is an exhaust butterfly valve, the vacuum pump includes a mechanical pump and a molecular pump, the diameter of the vacuum acquisition tube is 140-200mm; the air intake pipeline is a stainless steel pipeline with a diameter of 3-6mm, and the air intake stop valve is a small flow electromagnetic stop valve.

12. The single-pipeline vacuum high-voltage ignition test system according to claim 1, characterized in that: The vacuum high-voltage ignition test system also includes an electrical control module, which includes a human-computer interaction unit, an embedded control circuit unit and a power supply unit. The embedded control circuit unit is respectively communicatively connected with the human-computer interaction unit, the air intake shut-off valve, the pressure sensor, the gas mass flow controller, the exhaust control valve, the vacuum gauge and the controller of the vacuum pump.

13. The single-pipeline vacuum high-voltage ignition test system according to claim 1, characterized in that: The vacuum high-pressure ignition test system also includes a support structure, the bottom of the support structure is provided with casters, the vacuum tank body is fixed to the top of the support structure, the vacuum pump is fixed to the lower part of the support structure, and the air intake stop valve, pressure sensor and gas mass flow controller are fixed to the positioning plate in the middle of the support structure.

14. The testing method of the single-pipeline vacuum high-voltage ignition testing system according to any one of claims 1 to 13, comprising the following steps: Close the small flow stop valve, start the vacuum pump, open the exhaust control valve, stop the vacuum pump after the vacuum degree drops to 10-4Pa, open the small flow stop valve, pass the set flow of gas, and observe whether vacuum ignition can be achieved in the vacuum tank to test the power supply characteristics, or use the air intake pipeline to control the flow into a step pulse flow, and achieve uninterrupted and highly repeatable supply of micro-flow pulse gas, to test the various performance parameters of the high-voltage power supply when it continuously ignites under high vacuum.

15. The testing method according to claim 14, characterized in that: When the gas outlet position of the air intake assembly is adjustable, the adjustment is performed through the following steps: the gas is introduced through the air intake passage of the screw seat, passes through the hollow channel of the screw, and enters the vacuum tank body from the gas outlet of the screw, and is partially exposed to vacuum. When the second magnet block is rotated outside the screw seat, the first magnet block rotates therewith, driving the screw to rotate inside the screw seat. At the same time, the screw performs axial linear motion. As the screw advances and retreats, the position of the gas outlet in the vacuum tank body is adjusted.

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