High-voltage switch cabinet fault detection device

Abstract

The invention relates to the technical field of high-voltage switch cabinets, in particular to a high-voltage switch cabinet fault detection device which comprises a cabinet body, an instrument chamber, a bus chamber, a cable chamber, a tool chamber and a handcart chamber are sequentially arranged in the cabinet body, and a microcomputer is mounted on the inner side of the instrument chamber. The instrument chamber, the bus chamber, the cable chamber and the handcart chamber are communicated with the sealing cylinder, and because each compartment of the existing high-voltage switch cabinet adopts a sealing design to avoid mutual interference, when a fault occurs in any chamber, an abnormal discharge phenomenon is caused, composition materials in the cabinet body are decomposed to generate gas, and air pressure fluctuation is caused. And each air pressure sensor can monitor the air pressure fluctuation of each cavity at one end of the tool chamber through the other end of the communicating pipe, and the propagation and judgment of the air pressure fluctuation can be free from or less interfered by high-pressure, high-temperature and complex electromagnetic environments in the cabinet body, so that the advantage of high fault detection reliability is achieved.

Description

Technical Field

[0001] This invention relates to the field of high-voltage switchgear technology, specifically to a high-voltage switchgear fault detection device. Background Technology

[0002] High-voltage switchgear typically consists of independent, sealed compartments such as busbar compartment, cable compartment, handcart compartment, tool compartment, and instrument compartment. It plays a vital role in the power generation, transmission, and distribution processes of a power system. Currently, there are various methods available on the market for detecting faults in high-voltage switchgear, such as ultrasonic testing, transient voltage-to-ground testing, and ultra-high frequency testing. However, these methods generally suffer from insufficient reliability.

[0003] For example, ultrasonic testing and ultra-high frequency testing methods are problematic because high-voltage switchgear contains circuit breakers, disconnectors, cables, and other equipment. During the transmission of electrical energy, electromagnetic interference is generated, which can affect surrounding equipment and signals. In particular, when the load current of the high-voltage switchgear exceeds the equipment's carrying capacity, the conductor resistance increases, causing the switchgear temperature to rise sharply. High temperatures, smoke, and hot airflow can change the physical state of the air inside the cabinet. Tiny particles in the smoke may scatter electromagnetic waves, leading to signal attenuation. Moreover, hot airflow may trigger the "chimney effect," exacerbating changes in the propagation path of electromagnetic waves and making signal transmission inside the high-voltage switchgear even more unreliable.

[0004] Furthermore, because the high-voltage switchgear is divided into multiple sealed compartments, ultrasonic waves are subject to interference and attenuation in different media. This can significantly affect the determination of the location and extent of a fault, as well as whether a fault has occurred. It may lead to misjudgment of the fault or a decrease in the sensitivity of the fault detection response. In extreme environments, the high-voltage switchgear fault detection device may have serious reliability issues.

[0005] In view of this, a machine tool safety guard that can solve the above problems is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a fault detection device for high-voltage switchgear to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a high-voltage switchgear fault detection device, comprising a cabinet, wherein an instrument room, a busbar room, a cable room, a tool room, and a handcart room are sequentially arranged inside the cabinet; a microcomputer is installed on the inner side of the instrument room; a connecting plate is fixedly connected to the bottom side of the tool room; a sealing cylinder is fixedly connected to the upper side of the connecting plate; a turntable is rotatably connected to the inner side of the sealing cylinder; a culvert is formed on the inner side of the turntable; a connecting pipe is connected to one side of each of the instrument room, busbar room, cable room, and handcart room; one end of each connecting pipe is simultaneously connected to the outer side of the sealing cylinder; a pressure sensor is installed on the outer side of each connecting pipe near the end of the sealing cylinder; each pressure sensor is electrically connected to the microcomputer; a sliding groove is formed on the lower side of the sealing cylinder; a swing rod is fixedly connected to one side of the turntable; the outer side of the swing rod is slidably connected to the inner side of the sliding groove.

[0008] The lower end of the swing arm is provided with a fault indicator needle limiting mechanism, a pointer is installed on one side of the fault indicator needle limiting mechanism, and a vacuum pressure relief mechanism is provided on the outside of the sealing cylinder.

[0009] As a further embodiment of the present invention, the fault indicator needle limiting mechanism includes limiting sleeves fixedly connected to both sides of the connecting plate, limiting rods slidably connected to the inner sides of the two limiting sleeves, and a frame fixedly connected to the two limiting rods at their close ends. A pendulum limiting ball is rotatably connected to the inner side of the frame, and a slot is formed through the pendulum limiting ball. The inner side of the slot is slidably connected to the outer side of the pendulum rod, and the outer side of the frame is fixedly connected to the lower end of the pointer.

[0010] As a further embodiment of the present invention, a sealed cabinet door is rotatably connected to the outer side of the cabinet near the tool room. A fault indication observation window is provided on the sealed cabinet door, and a scale display panel is provided on the fault indication observation window. The fault indication observation window is configured in conjunction with a pointer.

[0011] As a further embodiment of the present invention, the vacuum pressure relief mechanism includes clamps fixedly connected to both sides of the sealing cylinder, the inner side of each clamp is slidably connected to the outer side of the turntable, and a turntable drive mechanism for rotating the turntable is provided on the outer side of one of the clamps.

[0012] As a further embodiment of the present invention, the turntable driving mechanism includes an air guide pipe fixedly connected to one side of the turntable. The air guide pipe extends outward through one of the clamping plates, and a support is fixedly connected to the outside of the clamping plate. A second bevel gear is sleeved on the outside of the air guide pipe. A gear driving mechanism for rotating the second bevel gear is provided on the upper side of the support. A vacuum pump mechanism is provided on the side of the support away from the turntable.

[0013] As a further embodiment of the present invention, the gear drive mechanism includes a servo motor mounted on the upper side of the support, the output end of the servo motor is fixedly connected to a first bevel gear, the first bevel gear meshes with a second bevel gear, and the servo motor is electrically connected to the microelectromechanical system.

[0014] As a further embodiment of the present invention, the vacuum pump mechanism includes a second duct opened on the turntable, one end of the second duct being connected to one end of the first duct, the end of the second duct away from the first duct being connected to the air guide pipe, and a dynamic sealing vacuum pumping mechanism being provided at one end of the air guide pipe.

[0015] As a further embodiment of the present invention, the dynamic sealing vacuum mechanism includes a vacuum pump installed on the upper side of the support, the suction end of the vacuum pump is connected to a suction pipe, one end of the suction pipe is connected to a dynamic sealing assembly, the side of the dynamic sealing assembly away from the suction pipe is rotatably connected to one end of the air guide pipe, and the vacuum pump is electrically connected to the microelectromechanical system.

[0016] As a further embodiment of the present invention, the connecting wires between the microcomputer and the pressure sensor, the servo motor and the vacuum pump are respectively connected by high-voltage flame-retardant cables.

[0017] As a further embodiment of the present invention, each time the turntable rotates away from its initial position, one end of the first culvert on the turntable can be aligned and connected with the lower end of one of the connecting pipes on the sealing cylinder.

[0018] The beneficial effects of this invention are:

[0019] 1. This invention connects the instrument room, busbar room, cable room, and handcart room to the sealed cylinder through multiple connecting pipes. Since the existing high-voltage switchgear uses a sealed design to avoid mutual interference between the various compartments, when a fault occurs in any compartment, causing abnormal discharge, the components inside the cabinet decompose and produce gas, which will cause air pressure fluctuations. Each air pressure sensor can monitor the air pressure fluctuations of each compartment by connecting the other end of the connecting pipe, that is, at one end of the tool room. The propagation and judgment of air pressure fluctuations are not affected or are minimally affected by the high voltage, high temperature and complex electromagnetic environment inside the cabinet, thus achieving the advantage of high reliability in fault detection.

[0020] 2. This invention detects pressure fluctuations in each chamber using a pressure sensor. A microcomputer-controlled servo motor then drives a second bevel gear to rotate a first bevel gear. The first bevel gear rotates the air guide pipe and turntable, aligning the first culvert with the connecting pipe of the faulty chamber. This discharges the generated gas and restores stable pressure. Simultaneously, the turntable rotation directly drives the pendulum to rotate, which in turn moves the frame left and right via a pendulum limit ball, thus moving the pointer horizontally. The pointer can be observed through a fault indicator window, allowing for rapid response to the fault location. This mechanical fault detection, processing, and judgment process offers significant advantages over traditional high-voltage switchgear fault detection based on data input / output from communication engineering and sensor technology, including longer service life and higher reliability.

[0021] 3. This invention uses a vacuum pump to evacuate the instrument room, busbar room, cable room, and handcart room. When the load current of the high-voltage switchgear exceeds the equipment's carrying capacity, generating a large amount of heat that increases the pressure in each chamber, in order to prevent the air pressure in each chamber from approaching the design limit pressure of the cabinet, the vacuum pump can be actively started. Then, the pressure in each chamber is automatically reduced by sequentially passing through the air guide pipe, the second culvert, the first culvert, and the connecting pipe leading to each chamber. This prevents the electric arc from penetrating and melting the adjacent cabinet plates, thereby improving the overall safety of the high-voltage switchgear. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a machine tool safety guard provided by the present invention;

[0023] Figure 2 for Figure 1 A sectional view;

[0024] Figure 3 This is a schematic diagram of the overall structure of the vacuum pressure relief mechanism in one embodiment of the present invention;

[0025] Figure 4 for Figure 3 A bottom view;

[0026] Figure 5 for Figure 4 A schematic diagram of the exploded structure;

[0027] Figure 6 This is a cross-sectional view of the turntable and air duct in one embodiment of the present invention;

[0028] Figure 7 This is a cross-sectional view of a turntable, multiple connecting pipes, and a culvert in one embodiment of the present invention.

[0029] In the diagram: 1. Cabinet; 2. Microcomputer; 3. Instrument room; 4. Connecting pipe; 5. Sealed cabinet door; 6. Fault indication observation window; 7. Clamping plate; 8. Pointer; 9. Sealing cylinder; 10. Busbar room; 11. Cable room; 12. Tool room; 13. Handcart room; 14. Air guide pipe; 15. Air pressure sensor; 16. Slide groove; 17. Connecting plate; 18. Limit sleeve; 19. Frame; 20. Pendulum limit ball; 21. Pendulum rod; 22. Limit rod; 23. First bevel gear; 24. Second bevel gear; 25. Dynamic sealing assembly; 26. Vacuum pump; 27. Servo motor; 28. Support; 29. ​​Turntable; 30. First culvert; 31. Second culvert. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1 The present invention provides a technical solution: a high-voltage switchgear fault detection device, including a cabinet 1. In this embodiment, the protection level between the outer shell and the internal compartments of the cabinet 1 is IP4X, that is, it has excellent sealing, waterproof and protective functions, and effectively avoids mutual interference.

[0032] It should be noted that the equipment installed inside cabinet 1, including circuit breakers, fans, operating mechanisms, vacuum arc-extinguishing mechanisms, instrument transformers, and busbars, are all existing, well-known, and mature technologies, and are not within the scope of protection of this invention patent. Specific performance and technical parameters are as follows:

[0033] Rated voltage 12KV

[0034] Rated current 4000A

[0035] 50Hz

[0036] Protection rating: IP4X

[0037] The implementation standard is GBT3906 DLT 404

[0038] Rated short-circuit duration 4S

[0039] Rated short-time withstand current 40kA

[0040] Rated peak withstand current 100kA

[0041] Please combine Figure 2As shown, the cabinet 1 contains, in sequence, an instrument room 3, a busbar room 10, a cable room 11, a tool room 12, and a handcart room 13. A microcomputer 2 is installed inside the instrument room 3. The microcomputer 2 has a built-in input / output module and controls the opening and closing of related devices in the high-voltage switchgear through parameter setting and logic calculation units, thus performing the function of a microcomputer protection device. It should be noted that in this embodiment, the data communication and electrical connection between the microcomputer 2 and other compartment equipment are all connected by high-voltage resistant and flame-retardant solid cables to avoid the use of modern transmission methods such as wireless network transmission, so as to avoid unstable data transmission and accidents caused by extreme high temperature and high pressure environments.

[0042] Please combine Figure 5 As shown, a connecting plate 17 is fixedly connected to the bottom side of the tool chamber 12, and a sealing cylinder 9 is fixedly connected to the upper side of the connecting plate 17. In this embodiment, the sealing cylinder 9 is fixedly installed to the bottom of the tool chamber 12 through the connecting plate 17. In other embodiments, it can be installed and connected to the inner side of the tool chamber 12 according to actual installation needs.

[0043] Please combine Figure 5 As shown, a turntable 29 is rotatably connected to the inner side of the sealing cylinder 9. The turntable 29 has a cylindrical structure, and a culvert 30 is opened on the inner side of the turntable 29. One side of the instrument chamber 3, busbar chamber 10, cable chamber 11 and handcart chamber 13 are respectively connected to a connecting pipe 4. One end of each connecting pipe 4 is simultaneously connected to the outer side of the sealing cylinder 9. A pressure sensor 15 is installed on the outer side of each connecting pipe 4 near the end of the sealing cylinder 9. It should be noted that in this embodiment, the pressure sensor 15 is installed on the outer side of the connecting pipe 4 near the sealing cylinder 9. This can avoid the influence of high temperature, high pressure and complex electromagnetic environment on the data detection of the pressure sensor 15 when abnormal discharge occurs in other chambers. Since the pressure fluctuation has linkage, when the pressure fluctuation occurs in the compartment far away from the cabinet 1, this fluctuation can be instantly transmitted to the outer side of the turntable 29 along the connecting pipe 4. In this way, the pressure fluctuation detected by the pressure sensor 15 at the end of the connecting pipe 4 can also fully reflect the pressure change in the chamber.

[0044] Please combine Figure 5 As shown, each pressure sensor 15 is electrically connected to the microcomputer 2, a groove 16 is provided on the lower side of the sealing cylinder 9, and a swing rod 21 is fixedly connected to one side of the turntable 29. The outer side of the swing rod 21 is slidably connected to the inner side of the groove 16.

[0045] Please combine Figure 4 As shown, a fault indicator needle limit mechanism is provided at the lower end of the swing arm 21, a pointer 8 is installed on one side of the fault indicator needle limit mechanism, and a vacuum pressure relief mechanism is provided on the outside of the sealing cylinder 9.

[0046] Please combine Figure 3 and Figure 1As shown, the fault indicator needle limiting mechanism includes limiting sleeves 18 fixedly connected to both sides of the connecting plate 17. Limiting rods 22 are slidably connected to the inner sides of the two limiting sleeves 18. The two limiting rods 22 are fixedly connected to a frame 19 at their close ends. A pendulum limiting ball 20 is rotatably connected to the inner side of the frame 19. A slot is opened through the pendulum limiting ball 20. The inner side of the slot is slidably connected to the outer side of the pendulum rod 21. The outer side of the frame 19 is fixedly connected to the lower end of the pointer 8.

[0047] With the above scheme, when the turntable 29 rotates due to changes in air pressure, it can directly drive the pendulum rod 21. The pendulum rod 21 can directly push the pendulum limiting ball 20 to move. Under the limiting action of the limiting sleeve 18, it can push the frame 19 to move horizontally left and right.

[0048] Please combine Figure 1 As shown, a sealed cabinet door 5 is rotatably connected to the outer side of the cabinet 1 near the tool room 12. A fault indication observation window 6 is provided on the sealed cabinet door 5. A scale display board is provided on the fault indication observation window 6. The fault indication observation window 6 is set in conjunction with the pointer 8. The name of the fault detection area on the cabinet 1 can be marked on the scale display board. When the pointer 8 stops at the standard position on the scale display board, such as the busbar room, it indicates that the air pressure in the busbar room has changed, which may be due to an abnormal discharge problem caused by a fault.

[0049] Please combine Figure 3 As shown, the vacuum pressure relief mechanism includes clamping plates 7 that are fixedly connected to both sides of the sealing cylinder 9. The clamping plates 7 are circular sealing plate structures. A circular sealing groove and a sealing ring are provided between the clamping plates 7 and the sealing cylinder 9, which can improve the overall sealing performance of the sealing cylinder 9, help improve the working efficiency of the vacuum pump 26, and make pressure reduction or pressure control more sensitive.

[0050] Please combine Figure 5 As shown, the inner side of each clamping plate 7 is slidably connected to the outer side of the turntable 29, and a turntable drive mechanism for rotating the turntable 29 is provided on the outer side of one of the clamping plates 7.

[0051] Please combine Figure 4 As shown, the turntable drive mechanism includes an air guide pipe 14 fixedly connected to one side of the turntable 29. The air guide pipe 14 extends outward through one of the clamping plates 7, and a support 28 is fixedly connected to the outside of the clamping plate 7. A second bevel gear 24 is sleeved on the outside of the air guide pipe 14. A gear drive mechanism for rotating the second bevel gear 24 is provided on the upper side of the support 28. A vacuum pump mechanism is provided on the side of the support 28 away from the turntable 29.

[0052] Please combine Figure 4As shown, the gear drive mechanism includes a servo motor 27 mounted on the upper side of the support 28. The output end of the servo motor 27 is fixedly connected to a first bevel gear 23, which meshes with a second bevel gear 24. The servo motor 27 is electrically connected to the microcomputer 2.

[0053] With the above scheme, the servo motor 27 can be rotated directly to drive the second bevel gear 24 to rotate, and then indirectly drive the air guide pipe 14 and the turntable 29 to rotate, so that the first culvert 30 can be connected to the connecting pipe 14 at different angle positions to form the spatial passage required for vacuuming.

[0054] The microcomputer 2 here controls the rotation angle of the turntable 29 each time through a programming program. That is, when the air pressure fluctuates in the instrument room 3, busbar room 10, cable room 11 and handcart room 13, and this air pressure data change is monitored by the air pressure sensor 15 and fed back to the microcomputer 2, the microcomputer 2 determines which compartment has abnormal discharge and air pressure change through the air pressure sensor 15 that feeds back the air pressure data, and then sends a command to the servo motor 27 to control the servo motor 27 to rotate the corresponding angle. The specific angle value of this rotation satisfies the function of aligning the No. 1 culvert 30 with the connecting pipe 4 of the faulty compartment at this time.

[0055] Please combine Figure 6 As shown, the vacuum pump mechanism includes a second duct 31 opened on the turntable 29. One end of the second duct 31 is connected to one end of the first duct 30. The end of the second duct 31 away from the first duct 30 is connected to the air guide pipe 14. A dynamic sealing vacuum pumping mechanism is provided at one end of the air guide pipe 14.

[0056] Please combine Figure 5 As shown, the dynamic sealing vacuum mechanism includes a vacuum pump 26 installed on the upper side of the support 28. In this embodiment, the exhaust port of the vacuum pump 26 can directly discharge other gases, and a one-way exhaust valve mechanism is provided on the outside of the tool chamber 12 to discharge the gas and introduce it into the external toxic pollutant gas filter canister.

[0057] The vacuum pump 26 has a suction pipe connected to its suction end, and a dynamic sealing assembly 25 is connected to one end of the suction pipe. The side of the dynamic sealing assembly 25 away from the suction pipe is rotatably connected to one end of the air guide pipe 14. The vacuum pump 26 is electrically connected to the microcomputer 2.

[0058] It should be noted that the dynamic sealing assembly 25 is a mature existing technology and is not within the scope of protection of this invention patent. The main function of the dynamic sealing assembly 25 is to connect the rotating air guide pipe 14 with the fixed dynamic sealing assembly 25 to ensure that no leakage occurs when the vacuum pump 26 is pumping air.

[0059] Please combine Figure 1As shown, the connecting wires between the microcomputer 2 and the pressure sensor 15, the servo motor 27 and the vacuum pump 26 are respectively connected by high-voltage flame-retardant cables.

[0060] Each time the turntable 29 rotates away from its initial position, one end of the first culvert 30 on the turntable 29 can be aligned and connected with the lower end of one of the connecting pipes 4 on the sealing cylinder 9.

[0061] Working principle: Inside the cabinet 1, multiple connecting pipes 4 are strategically arranged to connect the chambers of the instrument room 3, busbar room 10, cable room 11, and handcart room 13 to the sealing cylinder 9. When abnormal discharge occurs in the equipment, circuit board, or cable of each chamber, causing material decomposition and gas generation, an overall pressure change occurs in the space of each chamber and its connecting pipe 4. At this time, the pressure sensor 15 on one side of the lower end of each chamber's connecting pipe 4 can detect the pressure change in time, generate an electrical signal, and transmit it to the microcomputer 2 through a flame-retardant cable. The microcomputer 2 performs relevant logic calculations and sends a command to start the servo motor 27. The rotation drives the first bevel gear 23 to rotate, which in turn drives the second bevel gear 24 to rotate. The second bevel gear 24 directly drives the turntable 29 to rotate through the air guide pipe 14, pushing the first culvert 30 on the turntable 29 to align and connect with the lower end of the connecting pipe 4 of the abnormal discharge chamber. Then, the microcomputer 2 starts the vacuum pump 26, which pumps air from the abnormal discharge chamber through the dynamic sealing assembly 25, the air guide pipe 14, the first culvert 20, the second culvert 31, and the connecting pipe 4, so as to restore the air pressure stability in the chamber in time and avoid the cabinet 1 partition from twisting, deforming, or even exploding due to excessive pressure.

[0062] At the same time, the rotation of the turntable 29 can simultaneously drive the lower swing rod 21 to rotate along the inner side of the slide groove 16. The swing rod 21 pushes the frame 19 to slide horizontally along the limit sleeve 18 through the pendulum limit ball 20, thereby realizing that the frame 19 pushes the pointer 8 to move horizontally left and right. External personnel can observe and confirm the approximate location of the fault in the cabinet 1 as displayed by the fault detection device of this scheme through the fault indicator observation window 6 on the sealed cabinet door 5.

[0063] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fault detection device for a high-voltage switchgear, comprising a cabinet (1), characterized in that: The cabinet (1) contains, in sequence, an instrument room (3), a busbar room (10), a cable room (11), a tool room (12), and a handcart room (13). A microcomputer (2) is installed inside the instrument room (3). A connecting plate (17) is fixedly connected to the bottom of the tool room (12). A sealing cylinder (9) is fixedly connected to the upper side of the connecting plate (17). A turntable (29) is rotatably connected to the inner side of the sealing cylinder (9). A culvert (30) is opened inside the turntable (29). The instrument room (3), busbar room (10), and cable room (11) are connected in sequence. 11) and the side of the handcart compartment (13) are respectively connected to a connecting pipe (4). One end of each connecting pipe (4) is simultaneously connected to the outside of the sealing cylinder (9). A pressure sensor (15) is installed on the outside of each connecting pipe (4) near the end of the sealing cylinder (9). Each pressure sensor (15) is electrically connected to the microcomputer (2). A sliding groove (16) is opened on the lower side of the sealing cylinder (9). A swing rod (21) is fixedly connected to one side of the turntable (29). The outside of the swing rod (21) is slidably connected to the inside of the sliding groove (16). The lower end of the swing arm (21) is provided with a fault indicator needle limiting mechanism, and a pointer (8) is installed on one side of the fault indicator needle limiting mechanism. A vacuum pressure relief mechanism is provided on the outside of the sealing cylinder (9).

2. The high-voltage switchgear fault detection device according to claim 1, characterized in that: The fault indicator needle limiting mechanism includes limiting sleeves (18) fixedly connected to both sides of the connecting plate (17). Limiting rods (22) are slidably connected to the inner sides of the two limiting sleeves (18). A frame (19) is fixedly connected to the two limiting rods (22) at their close ends. A pendulum limiting ball (20) is rotatably connected to the inner side of the frame (19). A slot is opened through the pendulum limiting ball (20). The inner side of the slot is slidably connected to the outer side of the pendulum rod (21). The outer side of the frame (19) is fixedly connected to the lower end of the pointer (8).

3. The high-voltage switchgear fault detection device according to claim 1, characterized in that: A sealed cabinet door (5) is rotatably connected to the outer side of the cabinet (1) near the tool room (12). A fault indication observation window (6) is provided on the sealed cabinet door (5). A scale display panel is provided on the fault indication observation window (6). The fault indication observation window (6) is set in conjunction with a pointer (8).

4. The high-voltage switchgear fault detection device according to claim 1, characterized in that: The vacuum pressure relief mechanism includes clamps (7) that are fixedly connected to both sides of the sealing cylinder (9). The inner side of each clamp (7) is slidably connected to the outer side of the turntable (29). A turntable drive mechanism for rotating the turntable (29) is provided on the outer side of one of the clamps (7).

5. A high-voltage switchgear fault detection device according to claim 4, characterized in that: The turntable drive mechanism includes an air guide pipe (14) fixedly connected to one side of the turntable (29). The air guide pipe (14) extends outward through one of the clamps (7), and a support (28) is fixedly connected to the outside of the clamp (7). A second bevel gear (24) is sleeved on the outside of the air guide pipe (14). A gear drive mechanism for rotating the second bevel gear (24) is provided on the upper side of the support (28). A vacuum pump mechanism is provided on the side of the support (28) away from the turntable (29).

6. The high-voltage switchgear fault detection device according to claim 4, characterized in that: The gear drive mechanism includes a servo motor (27) mounted on the upper side of the support (28). The output end of the servo motor (27) is fixedly connected to a first bevel gear (23). The first bevel gear (23) meshes with the second bevel gear (24). The servo motor (27) is electrically connected to the microcomputer (2).

7. A high-voltage switchgear fault detection device according to claim 4, characterized in that: The vacuum pump mechanism includes a second culvert (31) opened on the turntable (29). One end of the second culvert (31) is connected to one end of the first culvert (30). The end of the second culvert (31) away from the first culvert (30) is connected to the air guide pipe (14). One end of the air guide pipe (14) is provided with a dynamic sealing vacuum pumping mechanism.

8. A high-voltage switchgear fault detection device according to claim 7, characterized in that: The dynamic sealing vacuum mechanism includes a vacuum pump (26) installed on the upper side of the support (28). The suction end of the vacuum pump (26) is connected to a suction pipe. One end of the suction pipe is connected to a dynamic sealing assembly (25). The side of the dynamic sealing assembly (25) away from the suction pipe is rotatably connected to one end of the air guide pipe (14). The vacuum pump (26) is electrically connected to the microcomputer (2).

9. A high-voltage switchgear fault detection device according to claim 8, characterized in that: The connecting wires between the microcomputer (2), the pressure sensor (15), the servo motor (27), and the vacuum pump (26) are respectively connected by high-voltage flame-retardant cables.

10. A high-voltage switchgear fault detection device according to claim 1, characterized in that: Each time the turntable (29) rotates away from its initial position, one end of the first culvert (30) on the turntable (29) can be aligned and connected with the lower end of one of the connecting pipes (4) on the sealing cylinder (9).

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