A common tank circuit breaker vacuum leak detector

Abstract

The utility model relates to circuit breaker inspection technical field provides a vacuum leak detector of common box type circuit breaker, include: leak detection cabinet, helium mass spectrum detection device, first air pump, second air pump, air suction and inflation nozzle, gas pipe, outer inspection four -way pipe, inner inspection four -way pipe, compressed helium jar, recovery helium jar, first solenoid valve, second solen electromagnetic valve, third solenoid valve, fourth solenoid valve, fifth solenoid valve, sixth solenoid valve, first reversing valve, common box type circuit breaker, leak detection cabinet is provided with the import and export of measured object, first detection hole and second detection hole, and the import and export of measured object is provided with sealing cover plate, and first detection hole is connected with outer inspection four -way pipe, and air suction and inflation nozzle are connected with the air port of common box type circuit breaker, and air suction and inflation nozzle still is connected with one end of gas pipe, and gas pipe passes through second detection hole. Advantage: utilize helium mass spectrum detection device and helium and detect the leakage situation of common box type circuit breaker, after detecting, recovery helium, improve the leakage situation efficiency of detecting common box type circuit breaker.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker testing technology, and specifically to a vacuum leak detector for a common-enclosure circuit breaker. Background Technology

[0002] A common-enclosure circuit breaker is a high-voltage switchgear that houses three-phase circuit breakers within a single enclosure. It offers advantages such as compact structure, high reliability, and convenient maintenance. Typically, the enclosure of a common-enclosure circuit breaker is filled with sulfur hexafluoride (SF6) gas; SF6 gas has the ability to rapidly extinguish electric arcs. For example, utility model patent CN210897120U discloses a common-enclosure high-voltage vacuum circuit breaker with a safety voltage.

[0003] Because the enclosure of a common-enclosure circuit breaker is filled with sulfur hexafluoride (SF6) gas, the enclosure must be airtight to prevent SF6 gas leakage during normal use. Therefore, it is necessary to test for gas leakage in the enclosure during the manufacturing process of common-enclosure circuit breakers.

[0004] The localized accumulation method is a traditional way to detect gas leaks. It involves wrapping the measuring area of ​​a common-enclosure circuit breaker with plastic sheeting, and after several hours, using a detector to check for leaked SF6 gas inside the plastic sheeting. Its disadvantages are that it takes several hours to confirm a leak, making it time-consuming and inefficient.

[0005] The soap bubble method is another traditional way to detect leaks. Soap water is applied to leak-prone areas such as the sealing surfaces of the circuit breaker and pipe connections, and the presence of bubbles is manually observed to determine if a leak exists. Its disadvantages are that manual inspection for leaks is labor-intensive and inefficient.

[0006] Therefore, in order to improve the efficiency of detecting air leakage in common-enclosure circuit breakers, there is an urgent need in this technical field for a vacuum leak detector for common-enclosure circuit breakers. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a vacuum leak detector for a common-enclosure circuit breaker.

[0008] The technical solution adopted in this utility model is: a vacuum leak detector for a common-enclosure circuit breaker, comprising: Leak detection cabinet, helium mass spectrometry detection device, first vacuum pump, second vacuum pump, vacuum and filling nozzle, gas transmission pipe, external inspection four-way pipe, internal inspection four-way pipe, compressed helium tank, recovered helium tank, first solenoid valve, second solenoid valve, third solenoid valve, fourth solenoid valve, fifth solenoid valve, sixth solenoid valve, first reversing valve, common box type circuit breaker. The leak detection cabinet is equipped with an inlet and outlet for the object to be tested, a first inspection port, and a second inspection port. The inlet and outlet for the object to be tested are equipped with sealing covers. The first inspection port is connected to the first port of the external four-way tube. The second port of the external four-way tube is connected to the inlet of the first solenoid valve. The outlet of the first solenoid valve is connected to the inlet of the first air pump. The outlet of the first air pump is open to the outside air. The third port of the external four-way tube is connected to the inlet of the second solenoid valve. The outlet of the second solenoid valve is connected to the detection port of the helium mass spectrometer. The fourth port of the external four-way tube is connected to the outlet of the third solenoid valve. The inlet of the third solenoid valve is open to the outside air. The gas filling nozzle and the common-enclosure circuit breaker are both located inside the leak detection cabinet. The gas filling nozzle is connected to the gas port of the common-enclosure circuit breaker. The gas filling nozzle is also connected to one end of the gas supply pipe. The gas supply pipe passes through the second inspection hole. The other end of the gas supply pipe is connected to the first port of the internal inspection four-way pipe. The second port of the internal inspection four-way pipe is connected to the inlet of the fourth solenoid valve. The outlet of the fourth solenoid valve is connected to the inlet of the second air pump. The outlet of the second air pump is connected to the inlet of the first reversing valve. The first outlet of the first reversing valve is connected to the outside air. The second outlet of the first reversing valve is connected to the recovered helium tank. The third port of the internal inspection four-way pipe is connected to the outlet of the fifth solenoid valve. The inlet of the fifth solenoid valve is connected to the compressed helium tank. The fourth port of the internal inspection four-way pipe is connected to the outlet of the sixth solenoid valve. The inlet of the sixth solenoid valve is connected to the outside air.

[0009] Furthermore, it also includes: a compressed sulfur hexafluoride tank and a second reversing valve; The first inlet of the second reversing valve is connected to the outside air, the second inlet of the second reversing valve is connected to the compressed sulfur hexafluoride tank, and the outlet of the second reversing valve is connected to the inlet of the sixth solenoid valve.

[0010] Furthermore, it also includes: a first switch indicator light, a second switch indicator light, a third switch indicator light, a fourth switch indicator light, a fifth switch indicator light, a sixth switch indicator light, a first reversing indicator light, and a second reversing indicator light; The first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, the sixth solenoid valve, the first reversing valve, and the second reversing valve are respectively electrically connected to the first switch indicator light, the second switch indicator light, the third switch indicator light, the fourth switch indicator light, the fifth switch indicator light, the sixth switch indicator light, the first reversing indicator light, and the second reversing indicator light.

[0011] Furthermore, it also includes: a first pressure gauge and a second pressure gauge, wherein the first pressure gauge is installed in the external four-way tube and the second pressure gauge is installed in the internal four-way tube.

[0012] Furthermore, it also includes a flexible tube, through which one end of the gas supply pipe is connected to the gas inlet / outlet nozzle.

[0013] Furthermore, it also includes: a control panel, which is electrically connected to the helium mass spectrometer detection device, the first pump, the second pump, the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, the sixth solenoid valve, the first directional valve, and the second directional valve.

[0014] Compared with the prior art, the beneficial effects or advantages of this utility model are as follows: This invention utilizes a helium mass spectrometer and helium gas to detect leaks in common-enclosure circuit breakers. The circuit breaker is placed inside a leak detection cabinet, and a vacuum valve is connected to the circuit breaker's gas inlet. The cabinet is then sealed. The cabinet is evacuated first, followed by the circuit breaker enclosure. Helium is then introduced into the circuit breaker, and the helium mass spectrometer is activated. When the circuit breaker enclosure has poor airtightness, helium leaks from the enclosure into the leak detection cabinet and is detected by the helium mass spectrometer. After detection, the helium is recovered, and a reversing valve effectively isolates it from the outside air. The leak detection cabinet is kept in a direct-air state, which facilitates rapid leakage from poorly airtight enclosures, saving time. The helium mass spectrometer is a highly sensitive leak detection instrument that eliminates the need for manual observation and provides highly accurate results. This invention improves the efficiency of detecting leaks in common-enclosure circuit breakers. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of a vacuum leak detector for a common-enclosure circuit breaker according to this utility model.

[0017] Figure 2 This is a schematic diagram showing the connection of the compressed sulfur hexafluoride tank, the second reversing valve, and the sixth solenoid valve in this utility model.

[0018] Figure reference numerals: 1. Leak detection cabinet; 2. Helium mass spectrometer; 3. First vacuum pump; 4. Second vacuum pump; 5. Vacuum filling nozzle; 6. Gas supply pipe; 7. External inspection four-way pipe; 8. Internal inspection four-way pipe; 9. Compressed helium tank; 10. Recovered helium tank; 11. First solenoid valve; 12. Second solenoid valve; 13. Third solenoid valve; 14. Fourth solenoid valve; 15. Fifth solenoid valve; 16. Sixth solenoid valve; 17. First reversing valve; 18. Common-enclosure circuit breaker; 19. Sealing cover plate; 20. Compressed sulfur hexafluoride tank; 21. Second reversing valve; 22. First pressure gauge; 23. Second pressure gauge; 24. Flexible tube. Detailed Implementation

[0019] This utility model embodiment provides a vacuum leak detector for a common-enclosure circuit breaker. The overall technical concept is as follows: Helium mass spectrometry (HMS) is used to detect leaks in common-enclosure circuit breakers. The HMS detector, a current technology, leverages the unique properties of helium and mass spectrometry analysis to achieve highly sensitive helium leak detection. HMS detectors are also known as helium mass spectrometers or helium mass spectrometer leak detectors. First, the staff placed the common-enclosure circuit breaker in the leak detection cabinet, connected the evacuation and charging nozzle to the air port of the common-enclosure circuit breaker, and covered it with a sealing cover to seal the leak detection cabinet. Then, the first evacuation pump evacuated the leak detection cabinet to remove the air. Next, the second evacuation pump evacuated the common-enclosure circuit breaker to remove the gas inside. The gas inside the common-enclosure circuit breaker was then discharged to the outside air through a reversing valve. Helium was then introduced into the common-enclosure circuit breaker, and the helium mass spectrometry detection device was activated to detect whether helium was leaking from the common-enclosure circuit breaker enclosure into the vacuum cabinet, thereby testing the airtightness of the enclosure. After the test was completed, the second evacuation pump removed the helium from the common-enclosure circuit breaker and sent it to the helium recovery tank through a reversing valve. The reversing valve effectively isolated the recovered helium from the outside air. Finally, the common-enclosure circuit breaker and the leak detection cabinet were ventilated sequentially to break the vacuum, and the tested common-enclosure circuit breaker was removed from the leak detection cabinet.

[0020] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0021] See Figure 1 and Figure 2 The preferred embodiment of this utility model.

[0022] A vacuum leak detector for a common-enclosure circuit breaker includes: 1. Leak detection cabinet; 2. Helium mass spectrometry detection device; 3. First vacuum pump; 4. Second vacuum pump; 5. Vacuum filling nozzle; 6. Gas supply pipe; 7. External inspection four-way pipe; 8. Internal inspection four-way pipe; 9. Compressed helium tank; 10. Recovered helium tank; 11. First solenoid valve; 12. Second solenoid valve; 13. Third solenoid valve; 14. Fourth solenoid valve; 15. Fifth solenoid valve; 16. Sixth solenoid valve; 17. First reversing valve; 18. Common box type circuit breaker. The leak detection cabinet 1 is provided with an inlet and outlet for the object to be tested, a first inspection port, and a second inspection port. The inlet and outlet for the object to be tested are provided with a sealing cover plate 19. The first inspection port is connected to the first port of the external inspection four-way pipe 7. The second port of the external inspection four-way pipe 7 is connected to the inlet of the first solenoid valve 11. The outlet of the first solenoid valve 11 is connected to the inlet of the first air pump 3. The outlet of the first air pump 3 is connected to the outside air. The third port of the external inspection four-way pipe 7 is connected to the inlet of the second solenoid valve 12. The outlet of the second solenoid valve 12 is connected to the detection port of the helium mass spectrometer detection device 2. The fourth port of the external inspection four-way pipe 7 is connected to the outlet of the third solenoid valve 13. The inlet of the third solenoid valve 13 is connected to the outside air. The air intake / exhaust nozzle 5 and the common-enclosure circuit breaker 18 are both located inside the leak detection cabinet 1. The air intake / exhaust nozzle 5 is connected to the air port of the common-enclosure circuit breaker 18. The air intake / exhaust nozzle 5 is also connected to one end of the air supply pipe 6. The air supply pipe 6 passes through the second inspection hole, and the other end of the air supply pipe 6 is connected to the first port of the internal inspection four-way pipe 8. The second port of the internal inspection four-way pipe 8 is connected to the inlet of the fourth solenoid valve 14, and the outlet of the fourth solenoid valve 14 is connected to the inlet of the second air pump 4. The outlet of the second air pump 4 is connected to the inlet of the first reversing valve 17. The first outlet of the first reversing valve 17 is connected to the outside air. The second outlet of the first reversing valve 17 is connected to the recovered helium tank 10. The third port of the internal inspection four-way pipe 8 is connected to the outlet of the fifth solenoid valve 15. The inlet of the fifth solenoid valve 15 is connected to the compressed helium tank 9. The fourth port of the internal inspection four-way pipe 8 is connected to the outlet of the sixth solenoid valve 16. The inlet of the sixth solenoid valve 16 is connected to the outside air.

[0023] The beneficial effects or advantages of this utility model are as follows: The leakage of the common-enclosure circuit breaker 18 is detected using a helium mass spectrometer 2 and helium gas. The common-enclosure circuit breaker 18 is placed inside the leak detection cabinet 1, and the evacuation and filling nozzle 5 is connected to the gas port of the common-enclosure circuit breaker 18. The cover plate is closed to seal the leak detection cabinet 1. First, the leak detection cabinet 1 is evacuated, then the enclosure of the common-enclosure circuit breaker 18 is evacuated. Helium gas is then introduced into the common-enclosure circuit breaker 18, and the helium mass spectrometer 2 is activated. When the leakage of the common-enclosure circuit breaker 18... When the airtightness of the enclosure is poor, helium leaks from the enclosure into the leak detection cabinet 1 and is detected by the helium mass spectrometer 2. After the detection is completed, the helium is recovered, and the recovered helium is effectively isolated from the outside air using a reversing valve. The leak detection cabinet 1 is in a direct-air state, which helps the poorly airtight enclosure to leak quickly, saving time. The helium mass spectrometer 2 is a highly sensitive leak detection instrument that does not require manual observation and judgment, and the detection results are highly accurate. This utility model improves the efficiency of detecting the leakage of the common enclosure circuit breaker 18.

[0024] One end of the sealing cover 19 is hinged to the leak detection cabinet 1. The sealing cover 19 covers the inlet and outlet of the object to be tested, and the sealing ring of the sealing cover 19 seals the connection between the sealing cover 19 and the inlet and outlet of the object to be tested. The pipe connection between the first inspection hole and the second inspection hole is sealed.

[0025] During the process of detecting air leakage in the common-enclosure circuit breaker 18, the solenoid valves open and close in a prescribed sequence, and the reversing valves change the gas flow direction in a prescribed sequence to cooperate in completing the air leakage detection. In this utility model, the description of the inlet and outlet of the solenoid valve is used to indicate the gas flow direction. The structure of the inflation / extension nozzle 5 can refer to the structure of automobile tire inflation nozzles or other existing technologies.

[0026] The helium mass spectrometry detection device is a product of existing technology. For reference, see the utility model patent document "Mobile Ammonia Mass Spectrometry Detection Device" with announcement number CN206670873U.

[0027] Furthermore, it also includes: a compressed sulfur hexafluoride tank 20 and a second reversing valve 21; The first inlet of the second reversing valve 21 is connected to the outside air, the second inlet of the second reversing valve 21 is connected to the compressed sulfur hexafluoride tank 20, and the outlet of the second reversing valve 21 is connected to the inlet of the sixth solenoid valve 16.

[0028] The beneficial effects of this technical solution are as follows: After the second air pump 4 removes the helium gas from the common-enclosure circuit breaker 18, when the air tightness test result of the common-enclosure circuit breaker 18 is qualified, sulfur hexafluoride gas is introduced into the common-enclosure circuit breaker 18; when the air tightness test result of the common-enclosure circuit breaker 18 is unqualified, air is introduced into the common-enclosure circuit breaker 18.

[0029] Furthermore, it also includes: a first switch indicator light (not shown), a second switch indicator light (not shown), a third switch indicator light (not shown), a fourth switch indicator light (not shown), a fifth switch indicator light (not shown), a sixth switch indicator light (not shown), a first reversing indicator light (not shown), and a second reversing indicator light (not shown). The first solenoid valve 11, the second solenoid valve 12, the third solenoid valve 13, the fourth solenoid valve 14, the fifth solenoid valve 15, the sixth solenoid valve 16, the first reversing valve 17, and the second reversing valve 21 are respectively electrically connected to the first switch indicator light, the second switch indicator light, the third switch indicator light, the fourth switch indicator light, the fifth switch indicator light, the sixth switch indicator light, the first reversing indicator light, and the second reversing indicator light.

[0030] The beneficial effects of this technical solution are: the indicator lights can intuitively indicate the current status of the solenoid valve and the directional valve, which helps the staff to confirm the leak detection work.

[0031] Furthermore, it also includes: a first pressure gauge 22 and a second pressure gauge 23, wherein the first pressure gauge 22 is installed on the external inspection four-way tube 7 and the second pressure gauge 23 is installed on the internal inspection four-way tube 8.

[0032] The beneficial effects of this technical solution are: the first pressure gauge 22 makes it easy for staff to understand the current air pressure status of the leak detection cabinet 1 and whether it is in a vacuum state; the second pressure gauge 23 makes it easy for staff to understand the current air pressure status of the enclosure of the common box circuit breaker 18 and whether it is in a vacuum state.

[0033] Furthermore, it also includes a flexible tube 24, through which one end of the air pump nozzle 5 and the air supply pipe 6 are connected.

[0034] The beneficial effects of this technical solution are: the common-enclosure circuit breaker 18 comes in various sizes, and the flexible tube 24 helps to move and adjust the position of the filling nozzle 5, so that the filling nozzle 5 can be better connected to the air port of the common-enclosure circuit breaker 18.

[0035] Furthermore, it also includes: a control panel (not shown), which is electrically connected to the helium mass spectrometer detection device 2, the first pump 3, the second pump 4, the first solenoid valve 11, the second solenoid valve 12, the third solenoid valve 13, the fourth solenoid valve 14, the fifth solenoid valve 15, the sixth solenoid valve 16, the first directional valve 17, and the second directional valve 21.

[0036] The beneficial effects of this technical solution are: the control panel can remotely control the status of each component and perform automatic leak detection; the control panel also has manual adjustment buttons, which facilitates manual operation by staff when repairing the machine; the control panel is an existing technology, such as the panel of a PLC controller.

[0037] The working principle of this utility model's vacuum leak detector for common-enclosure circuit breakers: (1) First, the staff put the common box circuit breaker 18 into the leak detection cabinet 1, connect the air inlet 5 to the air port of the common box circuit breaker 18, and cover the sealing cover 19. At this time, all the solenoid valves are in the closed state.

[0038] (2) Start the leak detection work. The first solenoid valve 11 is opened, the first vacuum pump 3 is running, and the leak detection cabinet 1 is evacuated. The first pressure gauge 22 displays the current air pressure of the pipeline connected to the leak detection cabinet 1. The first solenoid valve 11 is closed, and the first vacuum pump 3 is stopped.

[0039] (3) The fourth solenoid valve 14 is opened, the second vacuum pump 4 is running, and the enclosure of the common box circuit breaker 18 is evacuated. The second pressure gauge 23 displays the current air pressure of the pipeline connected to the enclosure of the common box circuit breaker 18. The gas in the enclosure of the common box circuit breaker 18 flows to the outside air through the second vacuum pump 4 and the reversing valve. The fourth solenoid valve 14 is closed, and the second vacuum pump 4 stops.

[0040] (4) The fifth solenoid valve 15 is opened, and the helium gas in the compressed helium tank 9 flows into the enclosure of the common box circuit breaker 18. The second solenoid valve 12 is opened, and the helium mass spectrometer detection device 2 is operated to detect the leakage of helium gas from the enclosure of the common box circuit breaker 18 to the leak detection cabinet 1. The helium gas in the leak detection cabinet 1 flows to the helium mass spectrometer detection device 2. After the detection work of the helium mass spectrometer detection device 2 is completed, the fifth solenoid valve 15 is closed, the second solenoid valve 12 is closed, and the helium mass spectrometer detection device 2 stops.

[0041] (5) The fourth solenoid valve 14 is opened, the first reversing valve 17 switches the flow direction, the second vacuum pump 4 runs, and the enclosure of the common box circuit breaker 18 is evacuated again. The helium in the enclosure of the common box circuit breaker 18 flows to the recovery helium tank 10 through the second vacuum pump 4 and the reversing valve. The fourth solenoid valve 14 is closed, the first reversing valve 17 switches the flow direction, and the second vacuum pump 4 stops.

[0042] (6) When the leakage test result of the common-enclosure circuit breaker 18 is qualified, open the sixth solenoid valve 16, and the second reversing valve 21 switches the flow direction to connect the sixth solenoid valve 16 with the compressed sulfur hexafluoride tank 20. Sulfur hexafluoride gas is filled into the enclosure of the common-enclosure circuit breaker 18, and then close the sixth solenoid valve 16. Then open the third solenoid valve 13. When the air pressure in the leak detection cabinet 1 is equal to the air pressure of the outside air, open the sealing cover 19 and remove the common-enclosure circuit breaker 18. When the leakage test result of the common-enclosure circuit breaker 18 is unqualified, open the sixth solenoid valve 16, and the second reversing valve 21 switches the flow direction to connect the sixth solenoid valve 16 with the outside air. Outside air is filled into the enclosure of the common-enclosure circuit breaker 18, and then close the sixth solenoid valve 16. Then open the third solenoid valve 13. When the air pressure in the leak detection cabinet 1 is equal to the air pressure of the outside air, open the sealing cover 19 and remove the common-enclosure circuit breaker 18.

[0043] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A vacuum leak detector for a common-enclosure circuit breaker, characterized in that, include: Leak detection cabinet, helium mass spectrometry detection device, first vacuum pump, second vacuum pump, vacuum and filling nozzle, gas transmission pipe, external inspection four-way pipe, internal inspection four-way pipe, compressed helium tank, recovered helium tank, first solenoid valve, second solenoid valve, third solenoid valve, fourth solenoid valve, fifth solenoid valve, sixth solenoid valve, first reversing valve, common box type circuit breaker. The leak detection cabinet is equipped with an inlet and outlet for the object to be tested, a first inspection port, and a second inspection port. The inlet and outlet for the object to be tested are equipped with sealing covers. The first inspection port is connected to the first port of the external four-way tube. The second port of the external four-way tube is connected to the inlet of the first solenoid valve. The outlet of the first solenoid valve is connected to the inlet of the first air pump. The outlet of the first air pump is open to the outside air. The third port of the external four-way tube is connected to the inlet of the second solenoid valve. The outlet of the second solenoid valve is connected to the detection port of the helium mass spectrometer. The fourth port of the external four-way tube is connected to the outlet of the third solenoid valve. The inlet of the third solenoid valve is open to the outside air. The gas filling nozzle and the common-enclosure circuit breaker are both located inside the leak detection cabinet. The gas filling nozzle is connected to the gas port of the common-enclosure circuit breaker. The gas filling nozzle is also connected to one end of the gas supply pipe. The gas supply pipe passes through the second inspection hole. The other end of the gas supply pipe is connected to the first port of the internal inspection four-way pipe. The second port of the internal inspection four-way pipe is connected to the inlet of the fourth solenoid valve. The outlet of the fourth solenoid valve is connected to the inlet of the second air pump. The outlet of the second air pump is connected to the inlet of the first reversing valve. The first outlet of the first reversing valve is connected to the outside air. The second outlet of the first reversing valve is connected to the recovered helium tank. The third port of the internal inspection four-way pipe is connected to the outlet of the fifth solenoid valve. The inlet of the fifth solenoid valve is connected to the compressed helium tank. The fourth port of the internal inspection four-way pipe is connected to the outlet of the sixth solenoid valve. The inlet of the sixth solenoid valve is connected to the outside air.

2. The vacuum leak detector for a common-enclosure circuit breaker according to claim 1, characterized in that, Also includes: Compression sulfur hexafluoride tank and second reversing valve; The first inlet of the second reversing valve is connected to the outside air, the second inlet of the second reversing valve is connected to the compressed sulfur hexafluoride tank, and the outlet of the second reversing valve is connected to the inlet of the sixth solenoid valve.

3. The vacuum leak detector for a common-enclosure circuit breaker according to claim 1, characterized in that, Also includes: First switch indicator light, second switch indicator light, third switch indicator light, fourth switch indicator light, fifth switch indicator light, sixth switch indicator light, first reversing indicator light, second reversing indicator light; The first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, the sixth solenoid valve, the first reversing valve, and the second reversing valve are respectively electrically connected to the first switch indicator light, the second switch indicator light, the third switch indicator light, the fourth switch indicator light, the fifth switch indicator light, the sixth switch indicator light, the first reversing indicator light, and the second reversing indicator light.

4. A vacuum leak detector for a common-enclosure circuit breaker according to claim 1, characterized in that, Also includes: A first pressure gauge and a second pressure gauge, wherein the first pressure gauge is installed in the external four-way valve and the second pressure gauge is installed in the internal four-way valve.

5. A vacuum leak detector for a common-enclosure circuit breaker according to claim 1, characterized in that, Also includes: A flexible tube is used to connect one end of the air pump nozzle to the air delivery pipe.

6. A vacuum leak detector for a common-enclosure circuit breaker according to claim 2, characterized in that, Also includes: The control panel is electrically connected to the helium mass spectrometer detection device, the first pump, the second pump, the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, the sixth solenoid valve, the first directional valve, and the second directional valve.

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