High-voltage switch cabinet with fault detection function

Abstract

The invention relates to the field of high-voltage switch cabinets, in particular to a high-voltage switch cabinet with a fault detection function, which comprises a cabinet body, a fault detection device is mounted in the cabinet body, a shielding frame is fixedly mounted on the top side of the cabinet body along the edge, a plurality of mounting cylinders are fixedly mounted on the top side of the cabinet body, and the mounting cylinders are communicated with the interior of the cabinet body. A nylon sleeve is arranged in the mounting cylinder in a threaded penetrating mode, a shielding plate is arranged at the top end of the nylon sleeve, a plurality of limiting plates are installed on the bottom face of the shielding plate, the multiple limiting plates are arranged around the center shaft of the mounting cylinder at intervals, the limiting plates are fixedly connected with the inner wall of the nylon sleeve, and first limiting blocks are fixedly installed on the bottom sides of the limiting plates. The first limiting block is located in the cabinet body and used for abutting against the inner top wall of the cabinet body. The high-voltage switch cabinet has the effect of improving the safety of the high-voltage switch cabinet during pressure relief.

Description

Technical Field

[0001] The present application relates to the field of high-voltage switchgear, and in particular to a high-voltage switchgear with a fault detection function. Background Art

[0002] High-voltage switchgear is one of the important electrical equipment in the power system and is widely used in power plants, substations and various industrial facilities. Its main function is to realize the circuit breaking and protection to ensure the safe and stable operation of the power system. In order to further improve safety, the existing high-voltage switchgear is usually equipped with a fault detection device, which can alarm in time when a high-voltage switchgear fails. However, when some faults occur, arc discharge or even explosion will occur inside the high-voltage switchgear, posing a serious threat to personnel and equipment.

[0003] At present, there are two common solutions to the pressure relief problem after the explosion of high-voltage switch cabinets: one is to set a fusible pressure relief cover on the top of the cabinet; the other is to use a pressure sensor to monitor the pressure changes in the cabinet and automatically open the pressure relief device when the preset threshold is reached. For the former, the usual practice is to open a pressure relief port on the top side of the cabinet and set a pressure relief cover inside the pressure relief port. One side of the pressure relief cover is hinged to the inner wall of one side of the pressure relief port, and the other side is connected to the inside of the other side of the pressure relief port through a nylon bolt. When an explosion occurs inside the cabinet, the high temperature will cause the nylon bolts to melt rapidly, causing the pressure relief cover to flip upward and open the pressure relief port for pressure relief. For the latter, solenoid valves, hydraulic valves and other fast-response components are often used as control components of the pressure relief device.

[0004] Although the above methods can alleviate the harm caused by the explosion of high-voltage switch cabinets to a certain extent, there are still obvious shortcomings. In particular, when the high-voltage switch cabinet is placed in a machine room with a low ceiling, after the pressure relief cover is flipped upward and opened, the gas inside the high-voltage switch cabinet is discharged upward from the pressure relief port to hit the ceiling. After the gas hits the ceiling, it spreads and easily causes damage to other objects inside the machine room. Summary of the invention

[0005] In order to improve the safety of high-voltage switch cabinet during pressure relief, the present application provides a high-voltage switch cabinet with a fault detection function.

[0006] The present application provides a high-voltage switch cabinet with a fault detection function, which adopts the following technical solution: A high-voltage switch cabinet with a fault detection function comprises a cabinet body, a fault detection device is installed inside the cabinet body, a shielding frame is fixedly installed along the edge of the top side of the cabinet body, a plurality of mounting tubes are fixedly installed on the top side of the cabinet body, the mounting tubes are communicated with the inside of the cabinet body, a nylon sleeve is passed through the internal thread of the mounting tube, a shielding plate is arranged on the top of the nylon sleeve, a plurality of limit plates are installed on the bottom surface of the shielding plate, a plurality of limit plates are arranged at intervals around the central axis of the mounting tube, the limit plate is fixedly connected to the inner wall of the nylon sleeve, a first limit block is fixedly installed on the bottom side of the limit plate, the first limit block is located inside the cabinet body, and the first limit block is used to abut against the inner top wall of the cabinet body.

[0007] By adopting the above technical solution, after the explosion occurs inside the cabinet, the nylon sleeve melts. Then the impact gas generated by the explosion drives the baffle plate to move upward. After the limit block abuts against the inner top wall of the cabinet, the baffle plate stops moving upward. Then the impact gas is blocked by the baffle plate and diffuses to the surroundings. Each baffle plate causes the impact gas to diffuse to the surroundings, so that the impact gas offsets each other, plays a role in reducing the impact force of the impact gas, and thus improves the safety of the high-voltage switch cabinet during pressure relief. Afterwards, the impact gas is discharged upward under the guidance of the baffle frame, thereby reducing the occurrence of the impact gas spraying onto the maintenance personnel.

[0008] Optionally, a sliding block is fixedly installed on the top side of the limit plate, and an annular cavity for sliding movement of the sliding block is opened inside the baffle plate, and an entrance and a first avoidance opening are opened on the bottom surface of the baffle plate. The entrance is connected to the annular cavity, and the entrance is used for allowing the sliding block to enter the annular cavity, and the first avoidance opening is used to avoid the limit plate.

[0009] By adopting the above technical solution, the nylon sleeve is screwed in from the bottom end of the installation tube, the limit plate is inserted into the installation tube along with the nylon sleeve, and the limit block is inside the cabinet. Then the slider is allowed to enter the ring cavity from the entrance, and the shielding plate is rotated to stagger the slider and the entrance, so as to facilitate the installation of the shielding plate.

[0010] Optionally, a connecting ring is provided inside the annular cavity, the connecting ring is fixedly passed through each of the sliding blocks, a partition is fixedly installed inside the annular cavity between two adjacent entrances, and the partition is provided with a second avoidance opening for avoiding the connecting ring.

[0011] By adopting the above technical solution, the connecting ring connects each slider corresponding to the shielding plate into a whole, so that each slider can be placed into the ring cavity together, thereby improving the installation efficiency of installing the shielding plate on the limit plate. The partition limits the slider inside the ring cavity, and when the slider is against the partition, the slider is staggered with the entrance, so that it is convenient to connect the limit plate with the shielding plate.

[0012] Optionally, a mesh plate is installed inside the shielding frame for lifting, and the mesh plate is located above each of the shielding plates. The mesh plate is installed with a buffer component, and the buffer component is used to buffer the rising of the shielding plates.

[0013] By adopting the above technical solution, when the cabinet explodes, if the shielding plate falls off under the impact of the explosion, the mesh plate will shield the shielding plate, thereby reducing the shielding plate from flying under the impact of the explosion and endangering other equipment in the machine room. When the shielding plate hits the mesh plate, the buffer component provides buffering, thereby reducing the damage to the mesh plate after being hit by the shielding plate.

[0014] Optionally, the buffer assembly includes a support block, a guide rod, a second limit block and a spring, the support block is fixedly mounted on the inner wall of the shielding frame, one end of the guide rod is fixedly connected to the top side of the support block, the other end of the guide rod is fixedly connected to the second limit block, the guide rod slides through the mesh plate, the spring is sleeved on the guide rod, the spring is located between the mesh plate and the second limit block, and the spring is used to perform buffering between the mesh plate and the second limit block.

[0015] By adopting the above technical solution, the spring provides elastic force between the screen and the second limit block, so that the screen can move upward for buffering after being hit by the shielding plate, thereby reducing the possibility of damage to the screen after being hit by the shielding plate.

[0016] Optionally, an exhaust pipe is fixedly installed inside the shielding frame, and an air collecting pipe is arranged outside the shielding frame. The air collecting pipe is connected to the exhaust pipe, and the air collecting pipe is connected to an air pump. The exhaust pipe has an exhaust hole on its body.

[0017] By adopting the above technical solution, after the explosion inside the cabinet, the air pump is started. The impact gas generated by the explosion enters the exhaust pipe from the exhaust hole, and then the impact gas inside the exhaust pipe enters the gas collecting pipe and is discharged. The gas collecting pipe is led to the outside of the machine room, thereby reducing the damage of the impact gas to the inside of the machine room. Alternatively, the gas collecting pipe is connected to the exhaust gas treatment equipment, and the exhaust gas treatment equipment performs harmless treatment on the impact gas, thereby reducing pollution to the environment.

[0018] Optionally, the exhaust hole is located on the top side of the exhaust pipe, and a sealing block is passed through the exhaust hole. The diameter of the sealing block gradually increases from bottom to top, and the diameter of the top side of the sealing block is larger than the diameter of the exhaust hole. A lifting rod is fixedly installed on the bottom side of the sealing block, and the diameter of the lifting rod is smaller than the diameter of the exhaust hole. The bottom end of the lifting rod slides through the bottom side of the exhaust pipe and abuts against the top side of the mesh plate.

[0019] By adopting the above technical solution, when an explosion occurs inside the cabinet, the shielding plate moves upward and squeezes the mesh plate, thereby moving the mesh plate upward. The mesh plate drives the lifting rod to move upward, thereby pulling the blocking block out of the exhaust hole, thereby facilitating the impact gas to enter the exhaust pipe from the exhaust hole. Generally, there will be multiple high-voltage switch cabinets in a machine room. Multiple high-voltage switch cabinets share one air pump. For the high-voltage switch cabinets that have not exploded, the blocking block continues to block the exhaust hole; while for the high-voltage switch cabinets that have exploded, the shielding plate drives the mesh plate to move, thereby pulling the blocking block out of the exhaust hole, thereby facilitating multiple high-voltage switch cabinets to share one air pump.

[0020] Optionally, the bottom end of the lifting rod is fixedly connected to the top side of the mesh plate, and the bottom side of the blocking block is provided with a telescopic groove for the top end of the lifting rod to be threaded through.

[0021] By adopting the above technical solution, after the lifting rod is fixedly connected to the mesh plate, the lifting rod is inserted into the exhaust pipe, and then the blocking block is screwed into the lifting rod, and the blocking block is inserted into the exhaust hole, so as to facilitate the installation of the lifting rod and the blocking block.

[0022] Optionally, a shielding film is fixedly installed inside the shielding frame, the shielding film is located above the exhaust pipe, and the shielding film is provided with an easy-to-tear opening.

[0023] By adopting the above technical solution, after the impact gas is discharged from the installation tube and enters the inside of the shielding frame, the shielding film blocks the impact gas, and the shielding film is deformed upward under the influence of the impact gas. It explodes inside the cabinet, and then it takes time to start the air pump to generate suction at the position of the exhaust hole. The shielding film blocks the upward flow of the impact gas, thereby reducing the discharge amount of the impact gas from the shielding frame upward, thereby improving the safety of the high-voltage switch cabinet during pressure relief. The amount of impact gas inside the cabinet is large, and the exhaust pipe cannot extract the impact gas in time, which is easy to tear and crack, thereby facilitating the discharge of the impact gas.

[0024] Optionally, the easy-tear opening is in a cross shape.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. When the explosion occurs inside the cabinet, the nylon sleeve will melt, and then the shielding plate will move upwards under the impact of the gas to open the top of the installation tube. The impact gas inside the cabinet will be discharged upwards through the installation tube. After that, the impact gas will be guided by the shielding plate and diffused to the surroundings. The impact gas discharged from each installation tube will diffuse to the surroundings, so that the impact gas will collide with each other to offset the impact force. After that, when the impact gas is discharged upwards through the shielding frame, the impact force of the impact gas is small, thereby improving the safety of the high-voltage switch cabinet during pressure relief; 2. Depending on the location of the explosion, the nylon sleeve close to the explosion location melts, thereby accelerating the upward movement of the baffle plate. The nylon sleeve far from the explosion location melts slowly, and the baffle plate is still covering the mounting tube. The baffle plate has moved upward, and the impact gas is discharged upward from the mounting tube and is blocked by the baffle plate. The impact gas diffuses to the surroundings, and the impact gas diffused to the surroundings flows over the baffle plate covering the mounting tube, thereby accelerating the air flow rate above the baffle plate, and then increasing the pressure difference between the inside and outside of the cabinet, making it convenient for the gas inside the cabinet to lift up the baffle plate still covering the mounting tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of the first viewing angle of Example 1 of the present application; Figure 2 is a schematic diagram of the overall structure of the second viewing angle of Example 1 of the present application; Figure 3 yes Figure 2 Sectional view at AA; Figure 4 yes Figure 3 A magnified view at point A; Figure 5 is a schematic diagram of the structure between the shielding plate and the nylon sleeve in Example 1 of the present application; Figure 6 yes Figure 5 Cross-sectional view at BB; Figure 7 is an exploded view between the shielding plate and the limiting plate of Example 1 of the present application; Figure 8 It is a schematic diagram of the overall structure of Example 2 of the present application; Fig. 9 yes Figure 8 Schematic diagram of the structure without the shielding film; Fig.10 is a schematic diagram of the structure of the air extraction pipe and the air collecting pipe of Example 2 of the present application; Fig.11 It is an exploded view between the lifting rod and the blocking block of Example 2 of the present application.

[0027] Explanation of the reference numerals in the accompanying drawings: 1. cabinet; 2. fault detection device; 3. shielding frame; 4. mounting tube; 5. nylon sleeve; 6. shielding plate; 7. limit plate; 8. first limit block; 9. slider; 10. ring cavity; 11. connecting ring; 12. easy-tear opening; 13. entrance opening; 14. first avoidance opening; 15. second avoidance opening; 16. partition; 17. mesh plate; 18. buffer assembly; 181. support block; 182. guide rod; 183. second limit block; 184. spring; 19. exhaust pipe; 20. air collecting pipe; 21. air pump; 22. exhaust hole; 23. sealing block; 24. telescopic slot; 25. lifting rod; 26. shielding film. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-11 This application is described in further detail.

[0029] Example 1.

[0030] An embodiment of the present application discloses a high-voltage switch cabinet with a fault detection function.

[0031] Reference Figure 1 , Figure 2 , Figure 3 A high-voltage switch cabinet with a fault detection function includes a cabinet body 1, and a fault detection device 2 is installed inside the cabinet body 1. The fault detection device 2 monitors the high-voltage switch cabinet and promptly alarms when a fault occurs in the high-voltage switch cabinet.

[0032] Reference Figure 3 , Figure 4 A shielding frame 3 is fixedly installed along the edge of the top side of the cabinet 1. A plurality of mounting tubes 4 are fixedly installed on the top side of the cabinet 1, and the mounting tubes 4 are connected to the inside of the cabinet 1. A nylon sleeve 5 is threaded through the inner thread of the mounting tube 4, and a shielding plate 6 is arranged at the top end of the nylon sleeve 5.

[0033] Reference Figure 4 , Figure 5 A plurality of limit plates 7 are installed on the bottom surface of the shielding plate 6, and the plurality of limit plates 7 are arranged around the central axis of the installation tube 4 at intervals. The limit plates 7 are fixedly connected to the inner wall of the nylon sleeve 5, and a first limit block 8 is fixedly installed on the bottom side of the limit plate 7, and the limit block is located inside the cabinet 1.

[0034] After the explosion inside the cabinet 1 generates impact gas, the impact gas melts the nylon sleeve 5, and then the impact gas drives the shielding plate 6 to move upward, thereby opening the top of the installation tube 4. The impact gas is sprayed from the top of the installation tube 4 to the shielding plate 6, and the shielding plate 6 shields the impact gas, so that the impact gas flows to the surroundings.

[0035] Generally, the nylon sleeve 5 near the explosion position melts first, and the nylon sleeve 5 far from the explosion position melts later, so that part of the shielding plate 6 first moves upward away from the installation tube 4, and the other part of the shielding plate 6 still covers the installation tube 4. Then the shielding plate 6 that moves upward away from the installation tube 4 first blocks the impact gas, allowing the impact gas to flow around, thereby accelerating the air flow rate above the cabinet 1. The air flow rate above the cabinet 1 is accelerated, thereby increasing the internal and external pressure difference on the top side of the cabinet 1, thereby increasing the impact force of the impact gas on the shielding plate 6 still covering the installation tube 4, making it easier for the impact gas to push the shielding plate 6 to move upward.

[0036] As the number of shielding plates 6 away from the shielding sleeve increases, the pressure relief speed of the cabinet 1 gradually increases. At the same time, the impact gas diffused to the surroundings will collide and cancel each other out, thereby reducing the flow rate of the impact gas. Afterwards, the impact gas flows upward under the guidance of the shielding frame 3, and the flow rate of the impact gas is small, thereby reducing the impact gas from damaging other equipment inside the machine room after hitting the ceiling and diffusing, thereby improving the safety of the high-voltage switch cabinet during pressure relief.

[0037] Reference Figure 6 , Figure 7 A slider 9 is fixedly installed on the top side of the limit plate 7, and an annular cavity 10 is provided inside the shielding plate 6 for the slider 9 to slide. A connecting ring 11 is provided inside the annular cavity 10, and the connecting ring 11 is fixedly passed through the slider 9 located inside the annular cavity 10, so as to facilitate the connection of each slider 9 corresponding to the shielding plate 6 into a whole. An entrance 13 and a first avoidance opening 14 are provided on the bottom surface of the shielding plate 6, and the entrance 13 is connected with the annular cavity 10. Each slider 9 corresponds to an entrance 13, and the entrance 13 is used for the slider 9 to enter the annular cavity 10. The first avoidance opening 14 is used to avoid the limit plate 7. A partition 16 is fixedly installed inside the annular cavity 10 between two adjacent entrances 13, and the partition 16 is provided with a second avoidance opening 15 for avoiding the connecting ring 11.

[0038] The nylon sleeve 5 is screwed in from the bottom end of the installation tube 4, the side of the limit plate 7 with the first limit block 8 is inside the cabinet 1, and the side of the limit plate 7 with the slider 9 is extended from the top of the installation tube 4. The slider 9 is aligned with the entrance 13, and the slider 9 is allowed to enter the annular cavity 10 from the entrance 13. Then the shielding plate 6 is rotated, and the slider 9 is allowed to slide inside the annular cavity 10 and then abut against the partition 16, thereby completing the connection between the shielding plate 6 and the limit plate 7.

[0039] Then, the shielding plate 6 is rotated continuously. The slider 9 cannot slide further inside the annular cavity 10 due to the limit of the partition plate 16, so that the shielding plate 6 drives the limit plate 7 to rotate. The limit plate 7 drives the nylon sleeve 5 to rotate. The shielding plate 6 is gradually rotated so that the shielding plate 6 is pressed against the top of the installation tube 4, thereby playing a blocking role and reducing the occurrence of dust entering the interior of the cabinet 1 from the installation tube 4.

[0040] Reference Figure 3 , Figure 4, a mesh plate 17 is installed inside the shielding frame 3 for lifting and lowering, the mesh plate 17 is located above each shielding plate 6, and a buffer assembly 18 is installed on the mesh plate 17. The buffer assembly 18 includes a support block 181, a guide rod 182, a second limit block 183 and a spring 184. The support block 181 is fixedly installed on the inner wall of the shielding frame 3, one end of the guide rod 182 is fixedly connected to the top side of the support block 181, and the other end of the guide rod 182 is fixedly connected to the second limit block 183. The guide rod 182 slides through the mesh plate 17, and the spring 184 is sleeved on the guide rod 182, and the spring 184 is located between the mesh plate 17 and the second limit block 183.

[0041] When the cabinet 1 explodes, some of the debris generated by the explosion will be ejected from the mounting tube 4. The mesh plate 17 is used to block the debris, thereby reducing the possibility of debris flying and injuring maintenance personnel. At the same time, the debris is concentrated in the space surrounded by the shielding frame 3, the mesh plate 17 and the cabinet 1, so that it is convenient to clean up the debris.

[0042] When the mesh plate 17 abuts against the support block 181, the spring 184 applies an upward elastic force to the mesh plate 17. When the impact gas impacts the baffle plate 6 to move upward, the baffle plate 6 abuts against the mesh plate 17. After that, the baffle plate 6 continues to move upward, and the baffle plate 6 will drive the mesh plate 17 to move upward. During the upward movement of the mesh plate 17, the elastic force applied by the spring 184 to the mesh plate 17 changes from upward to downward. When the first limit block 8 abuts against the inner top wall of the cabinet 1, the spring 184 applies a downward elastic force to the mesh plate 17, thereby facilitating the mesh plate 17 to support the baffle plate 6, thereby reducing the possibility of the baffle plate 6 falling off from the mounting tube 4 after being impacted by the impact gas.

[0043] If the shielding plate 6 still falls off the mounting tube 4 despite the dual support of the first limit block 8 and the mesh plate 17, the shielding plate 6 moves upward to squeeze the mesh plate 17, which is buffered by the elastic force of the spring 184, thereby reducing the shielding plate 6 from breaking the mesh plate 17, and then the shielding plate 6 flies and injures the maintenance personnel.

[0044] The implementation principle of a high-voltage switch cabinet with a fault detection function in the embodiment of the present application is as follows: the gas generated by the explosion inside the cabinet body 1 is ejected from the top of the mounting tube 4, and diffuses to the surroundings after being blocked by the shielding plate 6. The impact gas ejected from each mounting tube 4 diffuses to the surroundings, and the impact gases collide with each other and cancel each other out, thereby reducing the flow rate of the impact gas, thereby improving the safety of the high-voltage switch cabinet during pressure relief.

[0045] Afterwards, the impact gas flows upward under the guidance of the shielding frame 3, and the flow rate of the impact gas is low. After the impact gas moves upward and hits the ceiling, the diffusion flow speed is slow, which facilitates the cooling of the impact gas. At the same time, the impact force of the impact gas on other equipment is also small, thereby improving the safety of the high-voltage switch cabinet during pressure relief.

[0046] Example 2.

[0047] An embodiment of the present application discloses a high-voltage switch cabinet with a fault detection function.

[0048] Reference Figure 8 , Fig. 9 The difference between the high-voltage switchgear with fault detection function in the embodiment of the present application and the embodiment 1 is that a plurality of exhaust pipes 19 are arranged inside the shielding frame 3, and an air collecting pipe 20 is arranged outside the shielding frame 3. One end of the exhaust pipe 19 is fixedly connected to the inner wall of the shielding frame 3, and the other end of the exhaust pipe 19 is fixedly passed through the side wall of the shielding frame 3 and is fixedly connected to the air collecting pipe 20, and the air collecting pipe 20 is connected to the exhaust pipe 19. An air pump 21 is fixedly connected to one end of the air collecting pipe 20. The other end of the air collecting pipe 20 is blocked.

[0049] Reference Fig.10 , Fig.11 The top side of the exhaust pipe 19 is provided with an exhaust hole 22, and a blocking block 23 is inserted into the exhaust hole 22. The diameter of the blocking block 23 gradually increases from bottom to top, and the diameter of the top side of the blocking block 23 is larger than the diameter of the exhaust hole 22. The bottom side of the blocking block 23 is provided with a telescopic groove 24, and a lifting rod 25 is threadedly inserted into the telescopic groove 24. The diameter of the lifting rod 25 is smaller than the diameter of the exhaust hole 22, and the bottom end of the lifting rod 25 slides through the bottom side of the exhaust pipe 19 and is fixedly connected to the top side of the mesh plate 17.

[0050] Reference Figure 8 , Fig. 9 A shielding film 26 is fixedly installed inside the shielding frame 3, and the shielding film 26 is located above the exhaust pipe 19. The shielding film 26 is provided with an easy-tear opening 12. The shape of the easy-tear opening 12 is a cross.

[0051] The implementation principle of a high-voltage switch cabinet with a fault detection function in the embodiment of the present application is as follows: when an explosion occurs inside the cabinet 1, the impact gas drives the shielding plate 6 to move upward. The shielding plate 6 drives the mesh plate 17 to move upward, and the mesh plate 17 drives the lifting rod 25 to move upward, so that the blocking block 23 is pulled out from the air extraction hole 22. At the same time, the air pump 21 is started, and the impact gas enters the air extraction pipe 19 from the air extraction hole 22, and then the impact gas is discharged from the gas collecting pipe 20. The impact gas is discharged from the gas collecting pipe 20, and the amount of impact gas flowing to the ceiling is reduced, thereby improving the safety of the high-voltage switch cabinet during pressure relief.

[0052] The gas collecting pipe 20 is connected to the air pump 21 and then led to the outside of the machine room, thereby reducing the impact gas pollution inside the machine room. The gas collecting pipe 20 can also be connected to the air pump 21 and then connected to the exhaust gas treatment equipment, and the impact gas is treated by the exhaust gas treatment equipment, thereby reducing the impact gas pollution of the environment.

[0053] At the same time, it takes time for the air pump 21 to start and generate suction at the position of the air extraction hole 22, and it also takes time for the impact gas to fill the shielding frame 3. When the impact gas does not fill the shielding frame 3, the shielding film 26 blocks the impact gas from being discharged upward, thereby delaying the time for the impact gas to be discharged from the shielding frame 3, and making it easier for the air extraction pipe 19 to extract the impact gas. After a certain amount of impact gas accumulates inside the shielding frame 3, the shielding film 26 expands upward, thereby splitting the easy-tear opening 12, thereby reducing the pressure on the impact gas after it accumulates inside the shielding frame 3.

[0054] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-voltage switchgear with a fault detection function, characterized in that: The invention comprises a cabinet (1), wherein a fault detection device (2) is installed inside the cabinet (1), a shielding frame (3) is fixedly installed along the edge of the top side of the cabinet (1), a plurality of mounting tubes (4) are fixedly installed on the top side of the cabinet (1), the mounting tubes (4) are communicated with the inside of the cabinet (1), a nylon sleeve (5) is threadedly passed through the internal thread of the mounting tube (4), a shielding plate (6) is arranged at the top end of the nylon sleeve (5), a plurality of limiting plates (7) are installed on the bottom surface of the shielding plate (6), the plurality of limiting plates (7) are arranged around the central axis of the mounting tube (4) at intervals, the limiting plates (7) are fixedly connected to the inner wall of the nylon sleeve (5), a first limiting block (8) is fixedly installed on the bottom side of the limiting plate (7), the first limiting block (8) is located inside the cabinet (1), and the first limiting block (8) is used to abut against the inner top wall of the cabinet (1).

2. A high voltage switch cabinet with fault detection function according to claim 1, characterized in that: A slider (9) is fixedly mounted on the top side of the limit plate (7); an annular cavity (10) is provided inside the shielding plate (6) for the slider (9) to slide; an entry opening (13) and a first avoidance opening (14) are provided on the bottom surface of the shielding plate (6); the entry opening (13) is connected to the annular cavity (10); the entry opening (13) is used for the slider (9) to enter the annular cavity (10); and the first avoidance opening (14) is used for avoiding the limit plate (7).

3. The high-voltage switch cabinet with fault detection function according to claim 2, characterized in that: A connecting ring (11) is arranged inside the annular cavity (10), and the connecting ring (11) is fixedly passed through each of the sliding blocks (9). A partition plate (16) is fixedly installed between two adjacent entrance ports (13) inside the annular cavity (10), and the partition plate (16) is provided with a second avoidance port (15) for avoiding the connecting ring (11).

4. The high-voltage switch cabinet with fault detection function according to claim 1, characterized in that: A mesh plate (17) is installed inside the shielding frame (3) for lifting, the mesh plate (17) being located above each shielding plate (6), the mesh plate (17) being installed with a buffer component (18), the buffer component (18) being used to buffer the lifting of the shielding plate (6).

5. A high voltage switch cabinet with fault detection function according to claim 4, characterized in that: The buffer assembly (18) comprises a support block (181), a guide rod (182), a second limit block (183) and a spring (184); the support block (181) is fixedly mounted on the inner wall of the shielding frame (3); one end of the guide rod (182) is fixedly connected to the top side of the support block (181); the other end of the guide rod (182) is fixedly connected to the second limit block (183); the guide rod (182) slides through the mesh plate (17); the spring (184) is sleeved on the guide rod (182); the spring (184) is located between the mesh plate (17) and the second limit block (183); and the spring (184) is used to perform buffering between the mesh plate (17) and the second limit block (183).

6. The high-voltage switch cabinet with fault detection function according to claim 4, characterized in that: An air extraction pipe (19) is fixedly installed inside the shielding frame (3), and an air collecting pipe (20) is arranged outside the shielding frame (3). The air collecting pipe (20) is in communication with the air extraction pipe (19), and the air collecting pipe (20) is connected to an air pump (21). The air extraction pipe (19) is provided with an air extraction hole (22) on its body.

7. A high voltage switch cabinet with fault detection function according to claim 6, characterized in that: The air extraction hole (22) is located on the top side of the air extraction pipe (19), a sealing block (23) is provided inside the air extraction hole (22), the diameter of the sealing block (23) gradually increases from bottom to top, the diameter of the top side of the sealing block (23) is larger than the diameter of the air extraction hole (22), a lifting rod (25) is fixedly mounted on the bottom side of the sealing block (23), the diameter of the lifting rod (25) is smaller than the diameter of the air extraction hole (22), and the bottom end of the lifting rod (25) slides through the bottom side of the air extraction pipe (19) and abuts against the top side of the mesh plate (17).

8. The high-voltage switch cabinet with fault detection function according to claim 7, characterized in that: The bottom end of the lifting rod (25) is fixedly connected to the top side of the mesh plate (17), and the bottom side of the blocking block (23) is provided with a telescopic groove (24) for the top end of the lifting rod (25) to be threadedly penetrated.

9. The high-voltage switch cabinet with fault detection function according to claim 6, characterized in that: A shielding film (26) is fixedly installed inside the shielding frame (3); the shielding film (26) is located above the exhaust pipe (19); and the shielding film (26) is provided with an easy-tear opening (12).

10. A high voltage switch cabinet with fault detection function according to claim 9, characterized in that: The shape of the easy-tear opening (12) is a cross.

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