GIS (Gas Insulated Switchgear) electricity testing device

Abstract

The invention provides a GIS electricity testing device, and relates to the technical field of power equipment. The device comprises a main shell and a first connecting cylinder, wherein the first connecting cylinder is connected with a second connecting cylinder on a GIS equipment tank body. Two driving chains and a driving chain wheel are arranged in the main shell, meshing teeth are arranged on the driving chains, meshing parts of the two driving chains form a rigid body, the mounting cavity comprises a meshing area and a storage area, and the two driving chains are meshed in the meshing area, maintain the meshing state, sequentially penetrate through the meshing area and the first connecting cylinder and then are fixedly connected with the electricity testing component. And the electricity testing component can extend into the tank body under the driving of the driving chain wheel and the driving chain. The electricity testing component comprises a first mounting block, a plugging piston is arranged at the end part of the first mounting block, an electroscope and a torsion spring are rotationally arranged in a mounting groove of the first mounting block, and when the electricity testing component extends into the tank body, the electroscope is overturned and extends out. The device can directly perform electricity testing on the lead in the tank body, and breaks through the limitation of traditional indirect electricity testing.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, specifically a GIS voltage testing device. Background Technology

[0002] Gas-insulated switchgear (GIS) is a fully enclosed high-voltage electrical device that uses sulfur hexafluoride (SF6) or dry compressed air as the insulating medium. It adopts a single-phase encapsulated metal shell structure and integrates circuit breakers, disconnect switches, instrument transformers and other components.

[0003] When a GIS is switched to maintenance mode, voltage testing is required when closing the grounding switch according to operational requirements. Traditional outdoor electrical equipment can be tested for voltage using a voltage detector, but the voltage testing process for GIS has the following problems: 1. Because all components are enclosed in a steel container, direct external contact is impossible. Therefore, when the equipment is in maintenance mode, it cannot be directly tested for voltage using a voltage detector. Voltage testing must be performed indirectly, relying on changes in the equipment's mechanical position indicators, electrical indicators, live display devices, instruments, and various telemetry and remote signaling signals. This method is less reliable than direct voltage testing.

[0004] 2. Traditional GIS equipment is not designed with an electrical testing device during production. If there is a mechanical failure or other equipment problem, indirect electrical testing is prone to risks and may pose safety hazards to on-site work. Summary of the Invention

[0005] Addressing the core pain points of inconvenient voltage testing, insufficient reliability, and potential safety hazards when existing GIS equipment is switched to maintenance mode, this application provides a GIS voltage testing device that is directly integrated into the GIS equipment body and can directly test the wires inside the tank, breaking through the limitations of traditional indirect voltage testing.

[0006] The technical solution adopted by this invention to solve its technical problem is: A GIS voltage testing device includes a main housing and a first connecting cylinder disposed on the main housing. The first connecting cylinder is detachably and sealed and fixedly connected to a second connecting cylinder on the GIS equipment tank. The mounting cavity of the main housing is provided with two drive chains and at least one drive sprocket rotatably connected to the main housing. The drive chains are provided with meshing teeth, and the meshing teeth of the two drive chains can mesh with each other, and the meshing part forms a rigid body. The mounting cavity includes a meshing area and a storage area for storing the drive chains. The two drive chains mesh at the entrance of the meshing area and maintain the meshing state as they pass through the meshing area and the first connecting cylinder in sequence, and are then connected and fixed to the voltage detection component in the second connecting cylinder. The voltage detection component can be extended into the tank body under the drive of the drive sprocket and the drive chain. The central shaft of at least one drive sprocket extends to the outside of the main housing, and a first sealing ring is provided between the central shaft and the sealing plate. The voltage testing component includes a first mounting block, the end of which is provided with a sealing piston capable of sealing the second connecting cylinder. An electroscope is rotatably mounted in the mounting groove of the first mounting block. A torsion spring is provided between the electroscope and the first mounting block. The axis of the second connecting cylinder does not intersect with the axis of the corresponding wire inside the tank. When the voltage testing component is inserted into the tank, the electroscope flips and extends under the action of the torsion spring, and the voltage testing end of the electroscope is aligned with the corresponding wire.

[0007] Furthermore, the biting teeth include two T-shaped tooth plates with a rib plate between them. Each tooth plate includes a first biting portion with semi-circular ends. A second biting portion is provided in the middle of the first biting portion, and semi-circular recesses are provided on both sides of the second biting portion. When two adjacent biting teeth bite together, the semi-circular end of the first biting portion of one biting tooth is embedded in the semi-circular recess of the second biting portion of the other biting tooth.

[0008] Furthermore, the drive component includes two drive sprockets, one of which meshes with a drive chain, and the other of which meshes with another drive chain.

[0009] Furthermore, the upper ends of the central shafts of the two drive sprockets extend to the outside of the main housing, and gears are provided on the central shafts, with the two gears meshing with each other.

[0010] Furthermore, an upper cover is provided on the upper side of the main housing, and the upper cover is detachably and sealed to the main housing, and the gear is enclosed in the space between the upper cover and the main housing.

[0011] Furthermore, a first guide plate is provided in the storage area of ​​the mounting cavity, and the first guide plate and the main housing together form a guide channel for accommodating the drive chain.

[0012] Furthermore, the sealing piston includes a piston body, and a second sealing ring is sleeved on the outside of the piston body.

[0013] Furthermore, a second flange is provided at the end of the second connecting cylinder, the inner diameter of the second flange is smaller than the inner diameter of the second connecting cylinder, the first mounting block has a cylindrical structure, the diameter of the first mounting block is smaller than the diameter of the piston body and the inner diameter of the second flange, the diameter of the piston body is larger than the inner diameter of the second flange, a second sealing gasket is fitted on the first mounting block, and the second sealing gasket is in contact with the piston body.

[0014] Furthermore, the electroscope is rotatably connected to the first mounting block via a mounting bracket. The mounting bracket is provided with a protective plate. When the electroscope is flipped and extended under the action of a torsion spring, the protective plate is located on the side of the electroscope facing away from the corresponding wire.

[0015] The beneficial effects of this invention are: 1. The GIS voltage testing device provided in this application embodiment is directly integrated into the GIS equipment and can directly contact the wires inside the tank for voltage testing. It does not need to rely on various indirect signals, which fundamentally solves the problem of insufficient reliability of indirect voltage testing methods, ensures that the voltage testing results are true and accurate, and effectively avoids safety accidents caused by voltage testing misjudgment.

[0016] 2. The GIS voltage testing device provided in this application embodiment can quickly and accurately determine whether the equipment is energized, providing on-site operators with direct and reliable voltage testing basis, eliminating safety risks such as live operation and misoperation caused by inaccurate voltage testing from the source, and ensuring the safe and orderly conduct of on-site maintenance operations.

[0017] 3. The GIS voltage testing device provided in this application embodiment is fully adapted to the fully enclosed sealed structure characteristics of GIS equipment. During the voltage testing process, the sealing performance of the GIS tank will not be damaged, and the pressure environment of sulfur hexafluoride (SF6) or dry compressed air inside the tank will not be affected, ensuring that the original insulation performance and operational stability of the GIS equipment are not disturbed.

[0018] 4. The GIS voltage detector provided in this application embodiment has a simple and convenient operation process, requiring no complicated auxiliary tools. Furthermore, the GIS voltage detector provided in this application embodiment also considers ease of maintenance, allowing the voltage detector to be easily removed from the tank for routine maintenance operations such as battery replacement. It also does not affect the pressure environment of sulfur hexafluoride (SF6) or dry compressed air inside the tank, ensuring that the original insulation performance and operational stability of the GIS equipment remain undisturbed. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the installation structure of a GIS voltage detection device provided in an embodiment of this application; Figure 2 A cross-sectional view of a GIS equipment equipped with a GIS voltage testing device; Figure 3 for Figure 2 A magnified structural diagram of part A in the middle; Figure 4 for Figure 2 A magnified structural diagram of part B in the middle section; Figure 5 A three-dimensional structural diagram of a GIS voltage detection device provided in an embodiment of this application; Figure 6 A cross-sectional view of a GIS voltage detection device provided in an embodiment of this application; Figure 7 for Figure 6 A magnified structural diagram of section C; Figure 8 An exploded view of a GIS voltage testing device provided in an embodiment of this application; Figure 9 This is a schematic diagram of the installation structure of the drive chain; Figure 10 for Figure 9 A magnified structural diagram of section D; Figure 11 for Figure 9 A magnified structural diagram of section E in the middle; Figure 12 This is a cross-sectional view of the voltage detection component; Figure 13 An exploded view of the voltage detection component; Figure 14 A three-dimensional structural diagram of the electroscope when it flips and extends. Figure 15 This refers to the process of retracting the GIS voltage testing device after the voltage testing is completed. Figure 1 ; Figure 16 This refers to the process of retracting the GIS voltage testing device after the voltage testing is completed. Figure 2 ; Figure 17 This is a schematic diagram showing the positional relationship between the protective plate and the second connecting cylinder when the GIS voltage detector is retracted. Figure 18 The process of maintaining a voltage detector Figure 1 ; Figure 19 The process of maintaining a voltage detector Figure 2 .

[0020] In the diagram: 11. Tank body; 111. Second connecting cylinder; 112. Second flange; 113. Second stepped surface; 12. Wire; 21. Main housing; 211. Lower cover; 2111. Third flange; 212. Sealing plate; 213. First guide plate; 214. Second guide plate; 22. First connecting cylinder; 221. First flange; 23. Upper cover; 231. Fourth flange; 24. Third sealing gasket; 31. Drive chain; 311. Engaging teeth; 3111. Tooth plate; 3112. Rib plate; 32. Drive sprocket; 321. Sprocket body; 322. Central shaft; 3221. Insertion hole; 33. First bearing assembly; 34. Second bearing assembly; 35. First sealing ring; 36. Gear; 4. Voltage testing component; 41. First mounting block; 411. Mounting groove; 412. Limiting block; 4121. First limiting hole; 413. Connecting plate; 414. Pin; 42. Sealing piston; 421. Second sealing ring; 422. Second mounting block; 4221. First shaft section; 4222. Second shaft section; 423. End plate; 43. Voltage detector; 431. Voltage testing end; 44. Torsion spring; 45. Mounting bracket; 451. Seat plate; 452. Ear plate; 453. Limiting plate; 454. Protective plate; 46. Hinge shaft; 47. Set screw; 48. Second sealing gasket. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be described in detail below with reference to the accompanying drawings. The described embodiments are merely a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort should fall within the protection scope of this application.

[0022] To facilitate understanding of the specific embodiments of this application, a coordinate system for a GIS voltage detection device is defined as follows: Figure 5 As shown, the left and right directions are horizontal, the front and back directions are vertical, and the up and down directions are vertical.

[0023] Example 1 like Figure 1 and Figure 2As shown, a GIS voltage testing device is installed on the tank 11 of a GIS device. The number of GIS voltage testing devices is equal to the number of wires 12 inside the tank 11, and they correspond one-to-one. That is, the GIS voltage testing devices can be installed at different locations on the GIS device, and the number of GIS voltage testing devices can be arranged according to the number of wires 12 at that location. As a specific embodiment, in this embodiment, three wires 12 are installed inside the tank 11 at that location of the GIS device, and correspondingly, three GIS voltage testing devices are installed on the tank 11 of the GIS device, with each of the three GIS voltage testing devices corresponding one-to-one with the three wires 12 inside the tank 11.

[0024] like Figure 5 , Figure 6 , Figure 8 and Figure 9 As shown, a GIS voltage testing device includes a hollow main housing 21, the interior of which serves as an installation cavity. A first connecting cylinder 22 is provided on the side of the main housing 21 facing the tank 11, and the first connecting cylinder 22 communicates with the interior space (i.e., the installation cavity) of the main housing 21. A second connecting cylinder 111, communicating with the interior space of the tank 11, is provided on the tank 11 of the GIS equipment, and the first connecting cylinder 22 is detachably and sealedly fixedly connected to the second connecting cylinder 111.

[0025] In one specific embodiment, the main housing 21 in this embodiment includes a lower cover 211 with an opening at the upper end. A sealing plate 212 is fixedly installed at the upper opening of the lower cover 211 by welding. The lower cover 211 and the sealing plate 212 together form a closed mounting cavity. An avoidance hole is provided on the side wall of the lower cover 211 facing the tank 11. The shape and size of the avoidance hole are the same as the shape and size of the inner hole of the first connecting cylinder 22. The side of the avoidance hole and the side of the inner hole of the first connecting cylinder 22 together form a continuous and flat main channel, and the main channel is connected to the internal space of the tank 11 through the second connecting cylinder 111.

[0026] In one specific embodiment, a first flange 221 is provided at the end of the first connecting cylinder 22 facing the tank body 11, and a second flange 112 is provided at the end of the second connecting cylinder 111 facing the first connecting cylinder 22. The first flange 221 and the second flange 112 are connected and fixed by a plurality of first bolt assemblies, and a first sealing gasket (not shown in the figure) is provided between the first flange 221 and the second flange 112. The plurality of first bolt assemblies are evenly arranged around the second connecting cylinder 111 in the circumferential direction. For example, the first flange 221 and the second flange 112 are connected and fixed by eight first bolt assemblies. By using a flange connection and providing a first sealing gasket, the sealing of the connection between the first connecting cylinder 22 and the second connecting cylinder 111 can be ensured, preventing gas in the tank body 11 from leaking through the gap between the first connecting cylinder 22 and the second connecting cylinder 111.

[0027] A driving component is provided inside the mounting cavity, and an electrical detection component 4 is provided outside the mounting cavity.

[0028] The driving component includes two driving chains 31. Engaging teeth 311 are provided on the inner or outer chain plate of each driving chain 31 (with the side opposite to the two driving chains 31 when engaged as the inner side). The engaging teeth 311 of the two driving chains 31 can mesh with each other, and the meshing portion of the two driving chains 31 (i.e., the part of the driving chain 31 in the meshing state) can form a rigid body. That is, the driving chain 31 in the meshing state can be considered a rigid rod and no longer has flexibility.

[0029] In one specific embodiment, the meshing tooth 311 in this embodiment includes two tooth plates 3111 with an integral T-shaped structure, and the two tooth plates 3111 are respectively disposed on the two inner chain plates of the same link. Exemplarily, the tooth plate 3111 and the inner chain plate are an integral structure. A rib plate 3112 is disposed between the two tooth plates 3111 at the end of the tooth plate 3111 away from the inner chain plate, and the two ends of the rib plate 3112 are respectively connected and fixed to the tooth plate 3111 by welding. The tooth plate 3111 includes a first meshing portion parallel to the inner chain plate, and the two ends of the first meshing portion are semi-circular structures. A second meshing portion is disposed on the side of the first meshing portion facing the inner chain plate, the second meshing portion being located in the middle of the first meshing portion and perpendicular to it. The first meshing portion and the second meshing portion together form a T-shaped structure, and semi-circular recesses are respectively disposed on both sides of the second meshing portion. When two adjacent meshing teeth 311 mesh, the semi-circular end of the first meshing part of one meshing tooth 311 is precisely embedded in the semi-circular recess of the second meshing part of the other meshing tooth 311. Under the constraint of the meshing teeth 311, the drive chain 31 after meshing no longer has the degree of freedom to rotate around the link axis, so the two meshing drive chains 31 can form a rigid body similar to a rod-shaped structure.

[0030] according to Figure 5 The coordinate system shown is as follows: Figure 9 and Figure 10 As shown, the mounting cavity includes an engagement area and two storage areas. The engagement area is aligned with the first connecting cylinder 22, and the two storage areas are located on the left and right sides of the engagement area and are symmetrically arranged about the engagement area. The drive chain 31 includes a first end and a second end. The first ends of both drive chains 31 are connected to the voltage detection component 4, and the second ends of both drive chains 31 pass through the first connecting cylinder 22 and the engagement area of ​​the mounting cavity in sequence before entering the corresponding storage area. That is, the two drive chains 31 correspond one-to-one with the two storage areas; the second end of the drive chain 31 on the left extends into the left storage area, and the second end of the drive chain 31 on the right extends into the right storage area. After the meshing teeth 311 of the two drive chains 31 mesh at the entrance of the engagement area, they maintain the meshing state and pass through the engagement area and the first connecting cylinder 22 in sequence before being connected and fixed to the voltage detection component 4.

[0031] The drive component further includes at least one drive sprocket 32 ​​that meshes with the drive chain 31, and the drive sprocket 32 ​​is located at the entrance of the meshing area. Driven by the drive sprocket 32, the drive chain 31 can move from the storage area into the meshing area, or move from the meshing area back into the storage area.

[0032] In one specific embodiment, the driving component in this embodiment includes two drive sprockets 32, which are respectively located on both sides of the entrance to the meshing area. One drive sprocket 32 ​​meshes with a drive chain 31, and the other drive sprocket 32 ​​meshes with another drive chain 31.

[0033] like Figure 6 and Figure 7 As shown, the drive sprocket 32 ​​includes a sprocket body 321 and a central shaft 322, and the central shaft 322 and the sprocket body 321 are integrally formed. A first mounting hole with a blind hole structure is provided on the lower sidewall of the lower cover 211. The lower end of the central shaft 322 extends into the first mounting hole and is rotatably connected to the lower sidewall of the lower cover 211 via a first bearing assembly 33. The upper end of the central shaft 322 extends through the sealing plate 212 to the upper side of the sealing plate 212. A second mounting hole for accommodating the central shaft 322 is provided on the sealing plate 212, and the upper end of the central shaft 322 is rotatably connected to the sealing plate 212 via a second bearing assembly 34. A first sealing ring 35 is provided between the central shaft 322 and the sealing plate 212. The first sealing ring 35 is used to prevent gas in the tank 11 from leaking through the gap between the central shaft 322 and the second mounting hole.

[0034] In one specific embodiment, two first sealing rings 35 are provided between the central shaft 322 and the sealing plate 212. Two first grooves for accommodating the first sealing rings 35 are provided on the sidewall of the second mounting hole. The first sealing rings 35 are located within the first grooves, and the inner surface of the first sealing rings 35 is pressed tightly against the outer surface of the central shaft 322, thereby achieving a reliable seal.

[0035] Furthermore, such as Figure 6 and Figure 8 As shown, the upper ends of the central shafts 322 of both drive sprockets 32 penetrate the sealing plate 212. A gear 36 is fixedly mounted on the central shaft 322 of each drive sprocket 32 ​​above the sealing plate 212, and the two gears 36 mesh with each other. This design allows the driving force to be transmitted to the other drive sprocket 32 ​​via the gears 36 when one drive sprocket 32 ​​is rotated, thus enabling both drive sprockets 32 to simultaneously drive both drive chains 31, ensuring smooth and reliable movement.

[0036] Furthermore, at least one of the upper end faces of the central shaft 322 is provided with a insertion hole 3221 for cooperating with an operating tool.

[0037] In one specific implementation, in this embodiment, each of the two central shafts 322 has a plug hole 3221 on its upper end surface, and the cross-section of the plug hole 3221 is a regular hexagonal structure, which is used to cooperate with a hexagonal wrench.

[0038] Furthermore, such as Figure 8 and Figure 9 As shown, a first guide plate 213 is provided in the storage area of ​​the mounting cavity. The first guide plate 213 and the main housing 21 together form a guide channel for accommodating the drive chain 31. By providing the first guide plate 213, the drive chain 31 in the storage area can move along a specific guide channel, ensuring that the drive chain 31 can move smoothly and avoiding jamming.

[0039] As one specific implementation method, according to Figure 5 In the coordinate system shown, the mounting cavity in this embodiment is generally oblong, with two arc-shaped ends located on the left and right sides of the meshing area. The first guide plate 213 includes two horizontally extending straight sections, arranged front and rear. An arc-shaped section, coaxially arranged with the arc-shaped end of the mounting cavity, is provided at the end of the two straight sections away from the meshing area, and the front and rear ends of the arc-shaped section are respectively connected to the straight sections. The guide channel is formed between the first guide plate 213 and the side wall of the mounting cavity. For example, the first guide plate 213 is connected and fixed to the bottom plate of the lower cover 211 by welding.

[0040] Furthermore, such as Figure 9 and Figure 10 As shown, the mounting cavity is located on the left and right sides of the meshing area (according to...). Figure 5 The coordinate system shown is equipped with a second guide plate 214.

[0041] Furthermore, such as Figure 9 and Figure 11 As shown, the inner hole of the first connecting cylinder 22 has a square structure, and the cross-sectional dimensions of the inner hole of the first connecting cylinder 22 roughly match the cross-sectional shape of the two drive chains 31 in the interlocking state. That is, the cross-sectional dimensions of the inner hole of the first connecting cylinder 22 are slightly larger than the cross-sectional dimensions of the two drive chains 31 in the interlocking state, allowing the drive chains 31 in the interlocking state to pass smoothly through the inner hole of the first connecting cylinder 22. The inner side of the second guide plate 214 (with the side opposite to the two second guide plates 214 as the inner side) is flush with the main channel.

[0042] like Figure 11 , Figure 12 , Figure 13 and Figure 14As shown, the voltage detection component 4 includes a first mounting block 41. One end of the first mounting block 41 is detachably connected and fixed to the drive chain 31. The other end of the first mounting block 41 is provided with a sealing piston 42, which is adapted to the second connecting cylinder 111 and can seal the second connecting cylinder 111 to prevent gas in the tank 11 from flowing out through the second connecting cylinder 111. When the end face of the first mounting block 41 is in contact with the first connecting cylinder 22, the sealing piston 42 is located inside the second connecting cylinder 111. A mounting groove 411 is provided on the first mounting block 41 between the sealing piston 42 and the drive chain 31. An voltage detector 43 is provided in the mounting groove 411 and is rotatably connected to the first mounting block 41. A torsion spring 44 is provided between the voltage detector 43 and the first mounting block 41. Figure 4 As shown, when the first mounting block 41 is located inside the second connecting cylinder 111, the electroscope 43, under the constraint of the side wall of the second connecting cylinder 111, overcomes the elastic force of the torsion spring 44 and retracts into the mounting groove 411; Figure 3 As shown, the axis of the second connecting cylinder 111 does not intersect with the axis of the corresponding conductor 12 (according to...). Figure 5 In the coordinate system shown, the axis of the second connecting cylinder 111 is located to the right of the corresponding conductor 12. When the first mounting block 41 extends into the tank 11, the electroscope 43 moves towards the corresponding conductor 12 under the elastic action of the torsion spring 44 (according to...). Figure 5 (The coordinate system shown is on the left) The electroscope 43 is flipped outwards, with its detection end 431 located outside the first mounting block 41 and aligned with the corresponding wire 12. At this point, by continuing to extend the first mounting block 41 into the tank 11 via the driving component, the detection end 431 of the electroscope 43 can come into contact with the guide. Preferably, when the first mounting block 41 extends into the tank 11, the electroscope 43 flips outwards under the elastic action of the torsion spring 44, and the electroscope 43 and the first mounting block 41 are perpendicular to each other.

[0043] The electroscope 43 mentioned above is existing technology and can be obtained by purchasing it externally. Its internal structure will not be described in detail here.

[0044] like Figure 12 and Figure 13 As shown, in one specific implementation method, according to Figure 5In this embodiment, the electroscope 43 is rotatably connected to the first mounting block 41 via a mounting bracket 45 and a hinge shaft 46. The mounting bracket 45 includes a base plate 451, which is fixedly connected to the end face of the tail end of the electroscope 43 (with the end facing away from the testing end 431) by screws. The upper and lower ends of the base plate 451 are respectively provided with ear plates 452 extending perpendicularly to the base plate 451 away from the electroscope 43. The hinge shaft 46 is located within the mounting groove 411, and both ends of the hinge shaft 46 are respectively connected and fixed to the first mounting block 41. The ear plates 452 are provided with first hinge holes that mate with the hinge shaft 46. The torsion spring 44 is sleeved on the hinge shaft 46. A limiting block 412 is provided on the side of the mounting groove 411 near the end of the drive chain 31. The limiting block 412 is provided with a first limiting hole 4121. A limiting plate 453 is provided between the two ear plates 452. The limiting plate 453 is provided with a second limiting hole. One free end of the torsion spring 44 is inserted into the first limiting hole 4121, and the other free end of the torsion spring 44 is inserted into the second limiting hole.

[0045] In one specific embodiment, the first mounting block 41 in this embodiment is provided with a second hinge hole for accommodating the hinge shaft 46, and the second hinge hole penetrates the first mounting block 41 vertically. Two set screws 47 are provided at one end of the first mounting block 41 facing the drive chain 31. The two set screws 47 respectively abut against the upper and lower ends of the hinge shaft 46, thereby achieving a connection and fixation between the hinge shaft 46 and the first mounting block 41.

[0046] Thus, when installing and disassembling the voltage detector 43, it is only necessary to unscrew the set screw 47 and pull out the hinge shaft 46 to pull out the voltage detector 43, mounting bracket 45 and torsion spring 44 as a whole, making installation and disassembly very convenient.

[0047] In one specific embodiment, the first mounting block 41 in this embodiment has a cylindrical structure, and the mounting groove 411 penetrates the first mounting block 41 radially.

[0048] As one specific implementation method, as shown in the figure Figure 11 and Figure 13 As shown, in this embodiment, the first mounting block 41 has two connecting plates 413 at one end facing the drive chain 31. The first end of the drive chain 31 extends between the two connecting plates 413 and is connected and fixed to the connecting plates 413 by a pin 414.

[0049] like Figure 12 and Figure 14 As shown, the sealing piston 42 includes a piston body with a cylindrical structure, a second sealing ring 421 is sleeved on the outside of the piston body, and a second groove for accommodating the second sealing ring 421 is provided on the outer cylindrical surface of the piston body.

[0050] In one specific embodiment, the piston body in this embodiment includes a second mounting block 422 with a stepped shaft structure. One end of the second mounting block 422 is fixedly connected to the first mounting block 41, and the other end of the second mounting block 422 is provided with an end plate 423. The end plate 423 is detachably connected and fixed to the second mounting block 422 by screws or other means. The second mounting block 422 includes a first shaft segment 4221 and a second shaft segment 4222 in sequence along the direction away from the first mounting block 41. The diameter of the first shaft segment 4221 is larger than the diameter of the second shaft segment 4222, and a first stepped surface is formed between the first shaft segment 4221 and the second shaft segment 4222. The diameter of the end plate 423 is larger than the diameter of the second shaft segment 4222, and the recessed area between the first stepped surface and the end plate 423 is the second groove for accommodating the second sealing ring 421. Preferably, the diameter of the end plate 423 is equal to the diameter of the first shaft segment 4221.

[0051] As one specific implementation, the first mounting block 41 and the second mounting block 422 described in this embodiment are an integral structure.

[0052] Furthermore, such as Figure 4 As shown, the inner diameter of the second flange 112 is smaller than the inner diameter of the second connecting cylinder 111, and a second stepped surface 113 is formed between the second flange 112 and the second connecting cylinder 111. Figure 12 and Figure 14 As shown, the diameter of the first mounting block 41 is smaller than the diameter of the first shaft segment 4221 of the second mounting block 422, and a third stepped surface is formed between the first mounting block 41 and the second mounting block 422. The diameter of the first shaft segment 4221 of the second mounting block 422 is larger than the inner diameter of the second flange 112, and the diameter of the first mounting block 41 is smaller than the inner diameter of the second flange 112. A second sealing gasket 48 is fitted on the first mounting block 41, and the second sealing gasket 48 is in contact with the third stepped surface. Thus, as... Figure 19 As shown, when the electroscope 43 is pulled out for maintenance, not only can the second sealing ring 421 and the second connecting cylinder 111 cooperate to achieve a seal and prevent the gas in the tank 11 from leaking out, but the sealing piston 42 will also be pressed against the second step surface 113 under the pressure of the gas in the tank 11, thereby pressing the second sealing gasket 48 between the second step surface 113 and the third step surface, which can further improve the reliability of the seal.

[0053] Furthermore, such as Figure 13 and Figure 14 As shown, the mounting bracket 45 has a protective plate 454 extending perpendicularly to the base plate 451 towards the voltage testing end 431 of the voltage detector 43. When the voltage detector 43 is flipped and extended under the action of the torsion spring 44, the protective plate 454 is located on the side of the voltage detector 43 facing away from the corresponding wire 12.

[0054] The drive chain 31 is made of insulating material. In one specific embodiment, the drive chain 31 in this example is made of nylon material.

[0055] To further improve insulation reliability, the drive sprocket 32, mounting bracket 45, first mounting block 41, second mounting block 422, and end plate 423 are also made of insulating material. In one specific embodiment, the drive sprocket 32, mounting bracket 45, first mounting block 41, second mounting block 422, and end plate 423 in this embodiment are all made of nylon material.

[0056] Furthermore, such as Figure 5 and Figure 6 As shown, an upper cover 23 is provided on the upper side of the main housing 21. The upper cover 23 is detachably and sealed to the main housing 21. The gear 36 is enclosed in the space between the upper cover 23 and the main housing 21.

[0057] In one specific embodiment, a third flange 2111 extending horizontally outward is provided at the edge of the upper opening of the lower cover 211, and a fourth flange 231 extending horizontally outward is provided at the edge of the lower opening of the upper cover 23. The third flange 2111 and the fourth flange 231 are connected and fixed by a second bolt assembly, and a third sealing gasket 24 is provided between the third flange 2111 and the fourth flange 231.

[0058] The reason for setting the upper cover 23 here is that although the first sealing ring 35 can fully meet the pressure sealing requirements inside the tank 11 (the pressure inside the tank 11 is 0.5MPa, and taking the traditional O-ring as an example, its working pressure is 0-300MPa and its working speed is ≦15m / s), in terms of reliability, the sealing effect of the first sealing ring 35 is still not as good as that of the sealing gasket using a surface seal. Therefore, by setting the third sealing gasket 24 and the upper cover 23 to achieve a fixed surface seal, the reliability of the seal can be further guaranteed.

[0059] The voltage testing process of a GIS voltage testing device is as follows: First, the initial state of the GIS voltage detector is as follows: Figure 4 As shown, the upper cover 23 is then opened, and the drive sprocket 32 ​​is rotated using an operating tool (hex wrench), thereby pushing the voltage testing component 4 into the tank 11 via the drive chain 31. When the voltage testing component 4 is completely inside the tank 11, due to the lack of restraint from the second connecting cylinder 111, the voltage detector 43 and the mounting bracket 45 will flip and extend under the elastic action of the torsion spring 44, presenting as shown. Figure 14 The state shown.

[0060] Second, by using the operating tool, the voltage testing component 4 is further inserted into the tank 11 until the voltage testing end 431 of the voltage tester 43 contacts the corresponding wire 12, i.e. Figure 3 As shown in the diagram, if wire 12 is energized, the voltage detector 43 will sound an alarm. Staff can determine whether wire 12 is energized based on whether an alarm is sounded.

[0061] Third, after the voltage testing is completed, the drive sprocket 32 ​​is driven to rotate in the opposite direction by the operating tool, thereby pulling the voltage testing component 4 backward through the drive chain 31. Figure 15 and Figure 16 As shown, when the protective plate 454 contacts the joint between the tank body 11 and the second connecting cylinder 111, if the voltage testing component 4 is pulled backward, the mounting bracket 45 will cause the voltage tester 43 to flip and retract together under the restraint of the second connecting cylinder 111 (according to...). Figure 5 The coordinate system shown is flipped to the right until it returns to its original position. Figure 4 The state shown is that the rear end face of the first mounting block 41 abuts against the front end face of the first connecting cylinder 22. During this process, from... Figure 15 and Figure 16 It appears that the protective plate 454 is not in contact with the interior of the second connecting cylinder 111, such as... Figure 17 As shown, the reason is that the guard plate 454 is a straight plate, while the inner surface of the second connecting cylinder 111 is an arc-shaped surface. Therefore, the upper and lower ends of the guard plate 454 are in contact with the inner surface of the second connecting cylinder 111, while the middle position of the guard plate 454 is not in contact with the inner surface of the second connecting cylinder 111. Figure 17 A cross-section is obtained by cutting along the center line M. Figure 15 and Figure 16 This shows the middle position of the guard plate 454, so it does not contact the inner side of the second connecting cylinder 111.

[0062] Fourth, install the cover 23, thus completing one electrical testing process.

[0063] When the voltage detector 43 requires maintenance (e.g., battery replacement), the specific operating procedure is as follows: The initial state of the GIS voltage testing device is as follows: Figure 4 As shown, the first bolt assembly is then removed, and the entire GIS voltage detector is pulled backward. At this point, because the sealing piston 42 is located inside the second connecting cylinder 111, it effectively seals the second connecting cylinder 111, thus preventing gas leakage from the tank 11. Furthermore, because the inner diameter of the second flange 112 is smaller than the inner diameter of the second connecting cylinder 111, the mounting bracket 45 and the voltage detector 43 will continue to rotate slightly to the right under the constraint of the inner diameter of the second flange 112. When the second sealing gasket 48 is pressed against the second step surface 113 between the second flange 112 and the second connecting cylinder 111, the voltage detector 43 is completely exposed outside the tank 11. At this point, the voltage detector 43 can be disassembled and maintained, and under the action of the sealing piston 42, gas leakage from the tank 11 will not occur. After maintenance is completed, hold the mounting bracket 45 of the voltage detector 43 and retract the voltage detector 43 into the first mounting block 41. At the same time, push the entire GIS voltage detector inward until the first flange 221 and the second flange 112 are re-fitted. Then tighten the first bolt assembly.

[0064] Example 2 One drive sprocket 32's central shaft 322 passes through the sealing plate 212, while the other drive sprocket 32's central shaft 322 is located inside the mounting cavity. A third mounting hole with a blind hole structure is provided on the lower side of the sealing plate 212. The upper end of the other drive sprocket 32's central shaft 322 extends into the third mounting hole and is rotatably connected to the sealing plate 212 via a third bearing assembly. The remaining structure is the same as in Embodiment 1.

[0065] Example 3 The sealing plate 212 is connected and fixed to the lower cover 211 by locking screws. A third sealing ring is provided between the side of the sealing plate 212 and the lower cover 211, and a third groove for accommodating the third sealing ring is provided on the side of the sealing plate 212. In one specific embodiment, the sealing plate 212 is provided with four locking screws, two of which are provided in each storage area. The sealing plate 212 has through holes for accommodating the locking screws. Two threaded holes for cooperating with the locking screws are provided on the bottom surface of the lower cover 211 inside each guide plate. A fourth sealing gasket is fitted on the upper side of the locking bolt on the sealing plate 212. The fourth sealing gasket is pressed between the head of the locking bolt and the sealing plate 212, thereby preventing gas leakage from the gap between the locking bolt and the through hole. The remaining structure is the same as in Embodiment 1.

[0066] Example 4 Removing the gear 36, the driving component includes a drive sprocket 32, and the drive sprocket 32 ​​is located on one side of the entrance to the meshing area. As one specific embodiment, according to... Figure 5 In the coordinate system shown, the drive sprocket 32 ​​described in this embodiment is located to the left of the entrance to the meshing zone and meshes with the drive chain 31 on the left. A transition plate is provided to the right of the entrance to the meshing zone. One end of the transition plate is connected to the first guide plate 213 located on the right, and the other end of the transition plate is connected to the second guide plate 214 located on the right. Under the guidance of the transition plate, the drive chain 31 on the right can smoothly enter the meshing zone from the storage area and mesh with the drive chain 31 on the left. The remaining structure is the same as in Embodiment 1.

[0067] Other embodiments obtained by those skilled in the art based on the embodiments provided in this application by combining, splitting, or reorganizing the embodiments of this application do not exceed the protection scope of this application.

[0068] The above detailed embodiments have provided a detailed explanation of the purpose, technical solutions, and beneficial effects of the embodiments of this application. The above are merely specific embodiments of the embodiments of this application and are not intended to limit the protection scope of the embodiments of this application. That is, any modifications, equivalent substitutions, improvements, etc., made on the basis of the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. A GIS voltage detection device, characterized in that: It includes a main shell (21) and a first connecting cylinder (22) disposed on the main shell (21). The first connecting cylinder (22) is detachably and sealed and fixedly connected to a second connecting cylinder (111) on the GIS equipment tank (11). The mounting cavity of the main housing (21) is provided with two drive chains (31) and at least one drive sprocket (32) rotatably connected to the main housing (21). The drive chains (31) are provided with meshing teeth (311). The meshing teeth (311) of the two drive chains (31) can mesh with each other, and the meshing part forms a rigid body. The mounting cavity includes a meshing area and a storage area for storing the drive chains (31). The two drive chains (31) bite at the entrance of the meshing area. The components are engaged and maintained in an engaged state, passing sequentially through the engagement area and the first connecting cylinder (22) and then connected and fixed to the voltage testing component (4) inside the second connecting cylinder (111). The voltage testing component (4) can extend into the tank body (11) under the drive of the drive sprocket (32) and the drive chain (31). The central shaft (322) of at least one drive sprocket (32) extends to the outside of the main housing (21), and a first sealing ring (35) is provided between the central shaft (322) and the sealing plate (212). The voltage testing component (4) includes a first mounting block (41), the end of which is provided with a sealing piston (42) capable of sealing the second connecting cylinder (111). An electroscope (43) is rotatably disposed in the mounting groove (411) of the first mounting block (41). A torsion spring (44) is disposed between the electroscope (43) and the first mounting block (41). The axis of the second connecting cylinder (111) does not intersect with the axis of the corresponding wire (12) inside the tank (11). When the voltage testing component (4) is inserted into the tank (11), the electroscope (43) flips and extends under the action of the torsion spring (44), and the voltage testing end (431) of the electroscope (43) is aligned with the corresponding wire (12).

2. The GIS voltage detection device according to claim 1, characterized in that: The bite teeth (311) include two T-shaped tooth plates (3111), and a rib plate (3112) is provided between the two tooth plates (3111). Each tooth plate (3111) includes a first bite portion, and the two ends of the first bite portion are semi-circular structures. A second bite portion is provided in the middle of the first bite portion. Semi-circular recesses are provided on both sides of the second bite portion. When two adjacent bite teeth (311) bite together, the semi-circular end of the first bite portion of one bite tooth (311) is embedded in the semi-circular recess of the second bite portion of the other bite tooth (311).

3. The GIS voltage detection device according to claim 1, characterized in that: The drive component includes two drive sprockets (32), one of which meshes with a drive chain (31), and the other of which meshes with another drive chain (31).

4. The GIS voltage detection device according to claim 3, characterized in that: The upper ends of the central shafts (322) of the two drive sprockets (32) extend to the outside of the main housing (21), and gears (36) are provided on the central shafts (322), and the two gears (36) mesh with each other.

5. A GIS voltage detection device according to claim 4, characterized in that: The upper side of the main housing (21) is provided with an upper cover (23), which is detachably and sealed to the main housing (21). The gear (36) is enclosed in the space between the upper cover (23) and the main housing (21).

6. A GIS voltage detection device according to claim 1, characterized in that: The storage area of ​​the mounting cavity is provided with a first guide plate (213), and the first guide plate (213) and the main housing (21) together form a guide channel for accommodating the drive chain (31).

7. A GIS voltage detection device according to claim 1, characterized in that: The sealing piston (42) includes a piston body, and a second sealing ring (421) is sleeved on the outside of the piston body.

8. A GIS voltage detection device according to claim 7, characterized in that: The end of the second connecting cylinder (111) is provided with a second flange (112). The inner diameter of the second flange (112) is smaller than the inner diameter of the second connecting cylinder (111). The first mounting block (41) has a cylindrical structure. The diameter of the first mounting block (41) is smaller than the diameter of the piston body and the inner diameter of the second flange (112). The diameter of the piston body is larger than the inner diameter of the second flange (112). A second sealing gasket (48) is fitted on the first mounting block (41), and the second sealing gasket (48) fits against the piston body.

9. A GIS voltage detection device according to claim 1, characterized in that: The electroscope (43) is rotatably connected to the first mounting block (41) via a mounting bracket (45). A protective plate (454) is provided on the mounting bracket (45). When the electroscope (43) is flipped and extended under the action of the torsion spring (44), the protective plate (454) is located on the side of the electroscope (43) facing away from the corresponding wire (12).

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