A high-voltage DC disconnect switch

Abstract

This utility model relates to a high-voltage DC disconnect switch, comprising a cover plate, a turntable, a housing, a disc, moving contacts, stationary contacts, and an arc-extinguishing magnet. The turntable is rotatably connected to the bottom end of the cover plate. Multiple housings are provided, each rotatably connected to the bottom end of the turntable. Each housing has a first mounting hole. Buckles are provided on both the front and rear sides of the housing. The disc is rotatably connected to the inner bottom end of the housing. Multiple moving contacts are provided, each located at the top and bottom of the disc. Multiple stationary contacts are provided, each fixedly connected to the inner wall of the housing. The arc-extinguishing magnet passes through the first mounting hole. By connecting the housings with the buckles, the number of housings is increased, thereby increasing the number of moving and stationary contacts. This allows for flexible adjustment of the ports to be connected. The arc-extinguishing magnet guides the generated arc away from the moving and stationary contacts, reducing the probability of burn-in and increasing the service life of the device.

Description

Technical Field

[0001] This utility model relates to the field of disconnecting switch technology, and in particular to a high-voltage DC disconnecting switch. Background Technology

[0002] In recent years, with the rapid development of high-voltage direct current (HVDC) transmission technology, the performance requirements for disconnecting switches have been increasing. Traditional HVDC disconnecting switches mostly adopt arc-extinguishing structures, which cannot extinguish arcs. Especially under frequent switching operations, the arc is difficult to eliminate quickly, easily leading to contact erosion, decreased insulation performance, and seriously affecting equipment life and system reliability. In addition, existing disconnecting switches have low modularity and complex assembly processes, making it difficult to meet the stringent requirements of HVDC systems for compactness and maintainability. The connection ports of HVDC disconnecting switches usually adopt a fixed structure design, with the number and layout of ports limited at the factory. When multiple power sources need to be connected to the grid, multiple branch switching, or distributed energy access is required, flexible adjustments cannot be made.

[0003] The aforementioned existing technical solutions have the following drawbacks: the absence of an arc-extinguishing device easily leads to contact erosion, resulting in a short device lifespan; furthermore, the fixed structure of the disconnecting switch prevents the increase or adjustment of the number of contact pieces. Utility Model Content

[0004] The purpose of this invention is to provide a high-voltage DC disconnect switch to solve the problems existing in the prior art.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A high-voltage DC disconnect switch, comprising:

[0007] Cover plate;

[0008] A turntable, which is rotatably connected to the bottom end of the cover plate;

[0009] The outer shell is provided in multiple ways. The multiple outer shells have the same structure. The outer shells are rotatably connected to the bottom of the turntable. The multiple outer shells are installed sequentially from top to bottom. The multiple outer shells are provided with a first mounting hole that runs through the top and bottom. The front and rear sides of the outer shells are provided with integrally formed buckles.

[0010] A plurality of discs are provided, the plurality of discs having the same structure, and the discs are rotatably connected to the inner bottom end of the outer shell;

[0011] Multiple movable contact pieces are provided, and the multiple movable contact pieces have the same structure. The movable contact pieces are all provided at the top and bottom of the disk.

[0012] A plurality of static contact pieces are provided, and the plurality of static contact pieces have the same structure. The static contact pieces are all fixedly connected to the inner wall of the outer shell.

[0013] The system includes multiple arc-extinguishing magnets, all of which have the same structure and are arranged sequentially from top to bottom, with each magnet passing through a first mounting hole.

[0014] By adopting the above technical solution, buckles are set at both ends of the outer shell. By connecting the outer shell with the buckles, the number of outer shells can be increased, thereby increasing the number of moving and stationary contact pieces inside the outer shell. This allows for flexible adjustment of the ports that need to be connected. An arc-extinguishing magnet is inserted into the first mounting hole at the top of the outer shell. The arc-extinguishing magnet guides the generated arc away from the moving and stationary contact pieces, thereby reducing the probability of burning of the moving and stationary contact pieces and increasing the service life of the device.

[0015] In a further embodiment, the top of the cover plate is provided with a second mounting hole that runs vertically through the top, and the left and right ends of the outer shell are each provided with a third mounting hole that runs horizontally through the bottom.

[0016] In a further embodiment: a first clearance hole penetrating vertically is provided at the center of the disk, a plurality of third clearance holes penetrating vertically are provided on the periphery of the disk, the plurality of third clearance holes are symmetrical about the disk axis, a groove is provided on the side of the periphery of the disk, and a plurality of limiting blocks are provided at the top of the disk, the limiting blocks being used to fix and limit the moving contact piece.

[0017] In a further embodiment, each of the moving contact pieces is provided with a second clearance hole that extends vertically through the top. The second clearance hole of the moving contact piece is provided with an integrally formed bend, which is used to limit the arc-extinguishing magnet. Both ends of the moving contact piece are located at the third clearance hole of the disk. The first clearance hole and the second clearance hole are both rectangular.

[0018] In a further embodiment, the stationary contact piece is slidably installed in a groove on the periphery of the disk, one end of the stationary contact piece cooperates with the moving contact pieces at the top and bottom of the disk, and the other end of the stationary contact piece is fixedly connected to the third mounting hole of the housing by bolts.

[0019] In a further embodiment, the top end of the arc-extinguishing magnet is fixedly connected to the turntable, and a through hole is provided at the center of the top end of the arc-extinguishing magnet. The cross-section of the top end of the arc-extinguishing magnet is rectangular, and a fourth mounting hole is provided at the center of the bottom end of the arc-extinguishing magnet. The cross-section of the fourth mounting hole is rectangular and is larger than the cross-section of the top end of the arc-extinguishing magnet.

[0020] In a further embodiment, the left and right sides of the outer shell are provided with vertically penetrating grooves, and a sliding rod is slidably connected in the groove. The sliding rod is slidably connected to multiple outer shells, and a stop is provided at both ends of the sliding rod. The stop is used to restrict the vertical movement of the outer shell.

[0021] By adopting the above technical solution, the wires that need to be connected are fixedly connected to the third mounting holes on the left and right sides of the outer casing. When the isolating switch needs to be closed, the turntable is rotated, causing the arc-extinguishing magnet fixedly connected to the bottom of the turntable to rotate simultaneously. Since both the first and second clearance holes are rectangular, the arc-extinguishing magnet passes through the first clearance hole of the disc, thereby driving the disc to rotate. The moving contact piece is fixedly connected to the top and bottom of the disc, so that the moving contact piece follows the rotation of the disc. The stationary contact piece is located in the groove on the periphery of the disc, so that the stationary contact piece is always located at the interval between the moving contact piece at the top of the disc and the moving contact piece at the bottom of the disc. When the disc rotates to the corresponding position, thus... When the moving contact piece makes contact with the stationary contact piece, the disconnecting switch is activated. When the disconnecting switch needs to be disconnected, the turntable is rotated in the opposite direction, which causes the disc to rotate, separating the moving contact piece from the stationary contact piece at the top and bottom of the disc, thus disconnecting the disconnecting switch. If an electric arc is generated during the separation process, the arc-extinguishing magnet will guide the arc away from the moving and stationary contact pieces, thereby reducing the probability of burning of the moving and stationary contact pieces and increasing the service life of the device. When there are not enough contact points to connect to the disconnecting switch, multiple outer shells are snapped together by the latches on the front and rear sides of the outer shell, thereby increasing the number of contact points to connect to the disconnecting switch by increasing the number of outer shells.

[0022] In summary, this utility model has the following beneficial effects:

[0023] 1. By fixing the wires to be connected into the third mounting holes on the left and right sides of the casing, when the isolating switch needs to be closed, the turntable is rotated, causing the arc-extinguishing magnet fixedly connected to the bottom of the turntable to rotate simultaneously. Since both the first and second clearance holes are rectangular, the arc-extinguishing magnet passes through the first clearance hole of the disc, thereby driving the disc to rotate. The moving contact piece is fixedly connected to the top and bottom of the disc, so that the moving contact piece rotates with the disc. The stationary contact piece is located in the groove on the periphery of the disc, so that the stationary contact piece is always located at the interval between the moving contact piece at the top of the disc and the moving contact piece at the bottom of the disc. When the disc rotates to the corresponding position, the moving contact... When the moving contact piece contacts the stationary contact piece, the disconnecting switch is activated. When the disconnecting switch needs to be disconnected, the turntable is rotated in the opposite direction, causing the disc to rotate and separating the moving contact piece from the stationary contact piece at the top and bottom of the disc, thus disconnecting the disconnecting switch. If an electric arc is generated during the separation process, the arc-extinguishing magnet will guide the arc away from the moving and stationary contact pieces, thereby reducing the probability of burning of the moving and stationary contact pieces and increasing the service life of the device. When there are not enough contact points to connect to the disconnecting switch, multiple outer shells are snapped together by the latches on the front and rear sides of the outer shell, thereby increasing the number of outer shells to increase the number of contact points to connect to the disconnecting switch. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the disc structure of this utility model;

[0026] Figure 3 This is a cross-sectional view of the outer casing of this utility model.

[0027] In the diagram, 1 is the cover plate; 2 is the turntable; 3 is the outer shell; 4 is the buckle; 5 is the disc; 6 is the moving contact piece; 7 is the stationary contact piece; 8 is the arc-extinguishing magnet; 9 is the limiting block; 10 is the sliding rod; and 11 is the stop block. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings.

[0029] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.

[0030] Example 1:

[0031] like Figures 1-3 As shown, a high-voltage DC disconnect switch includes a cover plate 1, a rotary disk 2, a housing 3, a disc 5, a moving contact piece 6, a stationary contact piece 7, and an arc-extinguishing magnet 8. The rotary disk 2 is rotatably connected to the bottom end of the cover plate 1. Multiple housings 3 are provided, and the multiple housings 3 have the same structure. The top end of the housing 3 is rotatably connected to the bottom end of the rotary disk 2. The multiple housings 3 are installed sequentially from top to bottom. Each housing 3 has a first mounting hole that runs through it vertically. The front and rear sides of each housing 3 are provided with an integrally formed buckle 4. Multiple discs 5 are provided, and the multiple discs 5 have the same structure. Similarly, the discs 5 are arranged sequentially from top to bottom, and the discs 5 are rotatably connected to the inner bottom end of the outer shell 3. Multiple moving contact pieces 6 are provided, and the multiple moving contact pieces 6 have the same structure. The moving contact pieces 6 are all located at the top and bottom ends of the discs 5. Multiple stationary contact pieces 7 are provided, and the multiple stationary contact pieces 7 have the same structure. The stationary contact pieces 7 are all fixedly connected to the inner wall of the outer shell 3. Multiple arc-extinguishing magnets 8 are provided, and the multiple arc-extinguishing magnets 8 have the same structure. The multiple arc-extinguishing magnets 8 are arranged sequentially from top to bottom, and the multiple arc-extinguishing magnets 8 are inserted into the first mounting hole of the outer shell 3.

[0032] The top of the cover plate 1 is provided with a second mounting hole that runs vertically through the top. The left and right ends of the outer shell 3 are provided with third mounting holes that run horizontally through the bottom. The center of the disc 5 is provided with a first clearance hole that runs vertically through the top. The periphery of the disc 5 is provided with multiple third clearance holes that run vertically through the bottom. There are two third clearance holes, which are symmetrical about the axis of the disc 5. The side of the disc 5 is provided with a groove. The top of the disc 5 is provided with multiple limit blocks 9, which are used to limit the movement of the moving contact piece 6.

[0033] Each of the moving contact pieces 6 has a second clearance hole that runs vertically through the top. The second clearance hole of the moving contact piece 6 has an integrally formed bend inside, which is used to restrict the movement of the arc-extinguishing magnet 8. One end of the moving contact piece 6 is fixedly connected to a third clearance hole of the disk 5, and the other end of the moving contact piece 6 is fixedly connected to another third clearance hole that is symmetrical about the axis of the disk 5. The stationary contact piece 7 is slidably installed in the groove on the periphery of the disk 5. One end of the stationary contact piece 7 cooperates with the moving contact pieces 6 at the top and bottom of the disk 5, and the other end of the stationary contact piece 7 is fixedly connected to the third mounting hole of the outer casing 3 by bolts.

[0034] The top end of the arc-extinguishing magnet 8 is fixedly connected to the turntable 2. A through hole is provided at the center of the top end of the arc-extinguishing magnet 8. The cross-section of the top end of the arc-extinguishing magnet 8 is rectangular, and the cross-section of the bottom end of the arc-extinguishing magnet 8 is circular. A fourth mounting hole is provided at the center of the bottom end of the arc-extinguishing magnet 8. The cross-section of the fourth mounting hole is larger than the cross-section of the top end of the arc-extinguishing magnet 8, so that the top end of the arc-extinguishing magnet 8 can be inserted into the fourth mounting hole.

[0035] Both sides of the outer shell 3 are provided with grooves that run vertically through the shell. A sliding rod 10 is slidably connected in the groove. Multiple outer shells 3 are slidably connected to the sliding rod 10. A stop block 11 is provided at both ends of the sliding rod 10. The stop block 11 is used to restrict the movement of the outer shell 3 in the up / down direction. The first clearance hole, the second clearance hole, and the fourth mounting hole are all rectangular.

[0036] Specific implementation process: The wires to be connected are fixedly connected to the third mounting holes on the left and right sides of the outer casing 3. When the isolating switch needs to be closed, the turntable 2 is rotated, causing the arc-extinguishing magnet 8 fixedly connected to the bottom of the turntable 2 to rotate simultaneously. Since the first and second clearance holes are both rectangular, the arc-extinguishing magnet 8 passes through the first clearance hole of the disc 5, thereby driving the disc 5 to rotate. The moving contact piece 6 is fixedly connected to the top and bottom of the disc 5, so that the moving contact piece 6 follows the rotation of the disc 5. The stationary contact piece 7 is located in the groove on the periphery of the disc 5, so that the stationary contact piece 7 is always located at the interval between the moving contact piece 6 at the top of the disc 5 and the moving contact piece 6 at the bottom of the disc 5. When the disc 5 rotates to the corresponding position, thus... When the moving contact 6 and the stationary contact 7 come into contact, the disconnecting switch is activated. When the disconnecting switch needs to be disconnected, the turntable 2 is rotated in the opposite direction, thereby rotating the disc 5. This causes the moving contact 6 and the stationary contact 7 at the top and bottom of the disc 5 to separate, thus disconnecting the disconnecting switch. If an electric arc is generated during the separation process, the arc-extinguishing magnet 8 will guide the arc away from the moving contact 6 and the stationary contact 7, thereby reducing the probability of burning of the moving contact 6 and the stationary contact 7 and increasing the service life of the device. When there are not enough contact points to connect to the disconnecting switch, multiple outer shells 3 are snapped together by the buckles 4 on the front and rear sides of the outer shell 3, thereby increasing the number of contact points to connect to the disconnecting switch by increasing the number of outer shells 3.

[0037] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.

[0038] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A high voltage DC disconnector, characterized in that include: Cover plate (1); Turntable (2), which is rotatably connected to the bottom end of cover plate (1); The outer shell (3) is provided in multiple ways. The multiple outer shells (3) have the same structure. The outer shell (3) is rotatably connected to the bottom of the turntable (2). The multiple outer shells (3) are installed sequentially from top to bottom. The multiple outer shells (3) are provided with a first mounting hole that runs through the top and bottom. The outer shells (3) are provided with an integrally formed buckle (4) on both the front and rear sides. Disk (5), multiple disks (5) are provided, the multiple disks (5) have the same structure, and the disks (5) are rotatably connected to the inner bottom end of the outer shell (3); Multiple movable contact pieces (6) are provided, and the multiple movable contact pieces (6) have the same structure. The movable contact pieces (6) are all provided at the top and bottom of the disk (5). Static contact piece (7), multiple static contact pieces (7) are provided, multiple static contact pieces (7) have the same structure, and the static contact pieces (7) are all fixedly connected to the inner wall of the outer shell (3); The arc-extinguishing magnet (8) is provided in multiple ways. The multiple arc-extinguishing magnets (8) have the same structure. The multiple arc-extinguishing magnets (8) are arranged in order from top to bottom. The multiple arc-extinguishing magnets (8) are inserted into the first mounting hole.

2. A high voltage DC disconnector according to claim 1, characterized in that: The top of the cover plate (1) is provided with a second mounting hole that runs vertically through the top, and the left and right ends of the outer shell (3) are provided with a third mounting hole that runs horizontally through the bottom.

3. A high voltage DC disconnector according to claim 2, characterized in that: The disk (5) has a first clearance hole that runs vertically through the center, and multiple third clearance holes that run vertically through the periphery of the disk (5) are provided. The multiple third clearance holes are symmetrical about the axis of the disk (5). The disk (5) has a groove on its periphery side. The disk (5) has multiple limiting blocks (9) at its top. The limiting blocks (9) are used to fix and limit the moving contact piece (6).

4. A high voltage DC disconnector according to claim 3, characterized in that: The top of each moving contact piece (6) is provided with a second clearance hole that runs vertically through it. The second clearance hole of the moving contact piece (6) is provided with an integrally formed bend. The bend is used to limit the arc-extinguishing magnet (8). Both ends of the moving contact piece (6) are located at the third clearance hole of the disk (5). The first clearance hole and the second clearance hole are both rectangular.

5. A high voltage DC disconnector according to claim 3, characterized in that: The stationary contact piece (7) is slidably installed in the groove around the disk (5). One end of the stationary contact piece (7) is engaged with the moving contact pieces (6) at the top and bottom of the disk (5). The other end of the stationary contact piece (7) is fixedly connected to the third mounting hole of the outer casing (3) by bolts.

6. A high voltage DC disconnector according to claim 4, characterized in that: The top end of the arc-extinguishing magnet (8) is fixedly connected to the turntable (2). A through hole is provided at the center of the top end of the arc-extinguishing magnet (8). The cross-section of the top end of the arc-extinguishing magnet (8) is rectangular. A fourth mounting hole is provided at the center of the bottom end of the arc-extinguishing magnet (8). The cross-section of the fourth mounting hole is rectangular and is larger than the cross-section of the top end of the arc-extinguishing magnet (8).

7. A high voltage DC disconnector according to claim 1, characterized in that: The outer shell (3) has grooves that extend vertically through both the left and right sides. A sliding rod (10) is slidably connected in the groove. The sliding rod (10) slidably connects multiple outer shells (3). A stop block (11) is provided at both ends of the sliding rod (10). The stop block (11) is used to restrict the movement of the outer shell (3) in the up / down direction.

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