Vacuum arc-extinguishing chamber

Abstract

The utility model relates to the technical field of vacuum arc-extinguishing chambers, in particular to a vacuum arc-extinguishing chamber, which comprises an insulating casing, two ends of the insulating casing are respectively and fixedly connected with a static end cover and a moving end cover through bolts, the static end cover is fixedly connected with a static conductive contact assembly, and the moving end cover is inserted with a moving conductive contact assembly in a penetrating manner. The end part of the static conductive contact assembly is in a round head shape, the end part of the movable conductive contact assembly is in a round mortar shape, the end parts of the static conductive contact assembly and the movable conductive contact assembly are inserted in a matched manner, and the end part of the static conductive contact assembly is fixedly connected with a butt joint block; the butt joint surface of the static conductive contact assembly and the movable conductive contact assembly is large, the butt joint is accurate, whether the static conductive contact assembly and the movable conductive contact assembly are in butt joint or not is determined according to whether the butt joint block and the butt joint groove are in butt joint or not, people can find that the movable conductive contact assembly is possibly damaged due to rotation in time, the vacuum arc-extinguishing chamber is convenient to disassemble, and the service life of the vacuum arc-extinguishing chamber is prolonged. And replacement or maintenance of parts in the vacuum arc extinguishing chamber is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of vacuum interrupters, specifically a vacuum interrupter. Background Technology

[0002] Vacuum interrupters, also known as vacuum switch tubes, are core components of medium and high voltage power switches. Through the excellent insulation of the vacuum inside the tube, they enable medium and high voltage circuits to quickly extinguish arcs and suppress current after power is cut off, thus preventing accidents and incidents.

[0003] Existing vacuum interrupters, such as the one proposed in patent application number "CN201621031561.9", include structures such as a stationary end cover plate, a moving end cover plate, and a shielding cylinder. The interrupter is equipped with a cooling tank containing coolant. The upper and lower ends of the cooling tank are fixed in the interrupter by fasteners. The interrupter body contains a getter, resulting in good heat dissipation.

[0004] However, existing technologies have drawbacks. After running for a long time, the moving conductive rod will rotate, which will increase the friction between the moving conductive rod and the vacuum interrupter, increase the damage rate of parts, and the damage caused by the rotation of the moving conductive rod cannot be detected in time, which can easily lead to safety hazards. Therefore, a vacuum interrupter is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a vacuum interrupter to solve the problems mentioned in the background art.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A vacuum interrupter includes an insulating shell. A stationary end cover and a moving end cover are bolted to both ends of the insulating shell. A stationary conductive contact assembly is fixed to the stationary end cover, and a moving conductive contact assembly is inserted through the moving end cover. The end of the stationary conductive contact assembly is rounded, and the end of the moving conductive contact assembly is rounded. The ends of the stationary and moving conductive contact assemblies are fitted together. A mating block is fixed to the end of the stationary conductive contact assembly, and a mating groove is formed at the end of the moving conductive contact assembly. The mating block and the mating groove are inserted into each other.

[0008] Preferably, both the docking block and the docking groove are shaped like a cross, the area of ​​the docking groove is larger than that of the docking block, and the sides of the docking groove and the docking block that are close to each other are rounded.

[0009] Preferably, the inner wall of the insulating shell is provided with a recessed annular groove, and a shielding cover assembly is snapped onto the inner wall of the insulating shell. The shielding cover assembly includes a shielding cover middle part, which is snapped onto the recessed annular groove. Both ends of the shielding cover middle part are fixedly connected to shielding cover ends, which are in contact with the inner wall of the insulating shell. The static conductive contact assembly and the dynamic conductive contact assembly are located inside the shielding cover assembly.

[0010] Preferably, the inner wall of the insulating shell has multiple sets of slots, which are located at both ends of the shielding cover assembly. Each end of the shielding cover assembly is fixed with a card plate, which engages with the slot.

[0011] Preferably, the bolts are provided in multiple sets, and the multiple sets of bolts are arranged in a circumferential array, with the static conductive contact assembly and the dynamic conductive contact assembly being coaxial.

[0012] Preferably, the insulating shell has mounting grooves at both ends, and sealing rings are snapped into each of the two sets of mounting grooves. The stationary end cover and the moving end cover are respectively squeezed into the two sets of sealing rings. A limiting ring for preventing the sealing rings from falling off is fixed to the side of the mounting groove near the axis of the insulating shell.

[0013] The beneficial effects of this utility model are:

[0014] This invention achieves electrical conductivity through the connection of a round-headed static conductive contact assembly and a round-mouthed moving conductive contact assembly. The contact surface is large, ensuring accurate connection. During connection, the connecting block inserts into the connecting groove. When the moving conductive contact assembly rotates to a certain extent, the connecting block cannot accurately insert into the connecting groove, resulting in a gap between the moving and static conductive contact assemblies. This prevents a proper fit and operation of the vacuum interrupter. It also allows for the detection of potential damage to the moving conductive contact assembly due to rotation. Furthermore, the moving and static end caps are bolted to the insulating outer shell, facilitating disassembly and replacement or repair of parts inside the vacuum interrupter. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the insulating shell of this utility model;

[0018] Figure 3 yes Figure 2 Enlarged schematic diagram of the structure at point A;

[0019] Figure 4 This is a schematic diagram of the static conductive contact assembly structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the moving conductive contact assembly of this utility model;

[0021] Figure 6 This is a schematic diagram of the shielding cover assembly structure of this utility model;

[0022] The attached figures are labeled as follows:

[0023] 1. Insulating shell; 2. Stationary end cover; 3. Moving end cover; 4. Stationary conductive contact assembly; 5. Moving conductive contact assembly; 6. Butt groove; 7. Butt block; 8. Bolt; 9. Recessed annular groove; 10. Middle part of shielding cover; 11. End of shielding cover; 12. Clamping plate; 13. Clamping groove; 14. Mounting groove; 15. Sealing ring; 16. Limiting ring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] A vacuum interrupter, such as Figures 1-6 As shown, the device includes an insulating shell 1. A stationary end cover 2 and a moving end cover 3 are fixed to both ends of the insulating shell 1 by bolts 8. A stationary conductive contact assembly 4 is fixed to the stationary end cover 2, and a moving conductive contact assembly 5 is inserted through the moving end cover 3. The end of the stationary conductive contact assembly 4 is rounded, and the end of the moving conductive contact assembly 5 is rounded. The ends of the stationary conductive contact assembly 4 and the moving conductive contact assembly 5 are fitted together. A mating block 7 is fixed to the end of the stationary conductive contact assembly 4, and a mating groove 6 is provided at the end of the moving conductive contact assembly 5. The mating block 7 and the mating groove 6 are inserted into each other.

[0026] Conductive conductivity is achieved through the docking of the round-headed static conductive contact assembly 4 and the round-mouthed moving conductive contact assembly 5, resulting in a large contact surface and accurate docking. During docking, the docking block 7 is inserted into the docking groove 6. When the moving conductive contact assembly 5 rotates to a certain extent, the docking block 7 cannot be accurately inserted into the docking groove 6, resulting in a gap between the moving conductive contact assembly 5 and the static conductive contact assembly 4, preventing them from fitting together properly. This prevents the vacuum interrupter from operating and allows people to discover that the moving conductive contact assembly 5 may be damaged due to rotation. Furthermore, the moving end cover 3 and the static end cover 2 are bolted to the insulating shell 1, facilitating disassembly and replacement or maintenance of parts inside the vacuum interrupter.

[0027] like Figures 2-3 As shown, the docking block 7 and the docking groove 6 are both set to the shape of a "+", the area of ​​the docking groove 6 is larger than that of the docking block 7, and the sides of the docking groove 6 and the docking block 7 that are close to each other are both set to rounded corners.

[0028] The area of ​​the mating groove 6 is slightly larger than that of the mating block 7, so that the rotation of the moving conductive contact assembly 5 at a small angle does not affect its use. Only when a certain angle is reached will the two become unable to mate. The four ends of the cross are of different lengths to prevent the moving conductive contact assembly 5 from still entering the mating groove 6 after rotating at a certain angle. The rounded corners make it easier for the mating block 7 to enter the mating groove 6.

[0029] like Figure 2 , Figure 3 , Figure 6 As shown, the inner wall of the insulating shell 1 is provided with a recessed annular groove 9. A shielding cover assembly is snapped onto the inner wall of the insulating shell 1. The shielding cover assembly includes a shielding cover middle part 10, which is snapped onto the recessed annular groove 9. Shielding cover end parts 11 are fixed to both ends of the shielding cover middle part 10. The shielding cover end parts 11 are in contact with the inner wall of the insulating shell 1. The static conductive contact assembly 4 and the dynamic conductive contact assembly 5 are located inside the shielding cover assembly.

[0030] The central recess 10 of the shield is engaged in the recessed annular groove 9 to restrict the shield assembly from sliding up and down within the insulating shell 1.

[0031] like Figure 2 , Figure 3 , Figure 6 As shown, the inner wall of the insulating shell 1 has multiple sets of slots 13, which are located at both ends of the shielding cover assembly. Both ends of the shielding cover assembly are fixed with a plate 12, which engages with the slot 13.

[0032] After the shielding cover assembly is installed, the clamping plate 12 is bent and snapped into the clamping slot 13 to restrict the rotation of the shielding cover assembly, thereby limiting and fixing the shielding cover assembly inside the insulating shell 1.

[0033] like Figure 1 , Figure 2 As shown, there are multiple sets of bolts 8 arranged in a circumferential array, and the static conductive contact assembly 4 and the dynamic conductive contact assembly 5 are coaxial.

[0034] Multiple sets of bolts 8 ensure stability during installation and facilitate the disassembly and assembly of the moving end cover 3 and the stationary end cover 2. The stationary conductive contact assembly 4 and the moving conductive contact assembly 5 are coaxial, facilitating their docking and cooperation.

[0035] like Figure 2 , Figure 3As shown, both ends of the insulating shell 1 are provided with mounting grooves 14, and sealing rings 15 are snapped into the two sets of mounting grooves 14. The stationary end cover 2 and the moving end cover 3 are respectively squeezed and fitted with the two sets of sealing rings 15. A limiting ring 16 for preventing the sealing rings 15 from falling off is fixed to the side of the mounting groove 14 near the axis of the insulating shell 1.

[0036] The sealing ring 15 is snapped into the mounting groove 14 to increase the sealing between the moving end cover 3 and the stationary end cover 2 and the insulating shell 1. The limiting ring 16 prevents the sealing ring 15 from falling off and entering the insulating shell 1.

[0037] The working principle of the vacuum interrupter provided by this utility model is as follows:

[0038] Conductive conductivity is achieved through the docking of the round-headed static conductive contact assembly 4 and the round-mouthed moving conductive contact assembly 5, resulting in a large contact surface and accurate docking. During docking, the docking block 7 is inserted into the docking groove 6. When the moving conductive contact assembly 5 rotates to a certain extent, the docking block 7 cannot be accurately inserted into the docking groove 6, resulting in a gap between the moving conductive contact assembly 5 and the static conductive contact assembly 4, preventing them from fitting together properly. This prevents the vacuum interrupter from operating and allows people to discover that the moving conductive contact assembly 5 may be damaged due to rotation. Furthermore, the moving end cover 3 and the static end cover 2 are bolted to the insulating shell 1, facilitating disassembly and replacement or maintenance of parts inside the vacuum interrupter.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A vacuum interrupter, comprising an insulating outer shell (1), characterized in that, The insulating shell (1) has a stationary end cover (2) and a moving end cover (3) fixed to its two ends by bolts (8). A stationary conductive contact assembly (4) is fixed to the stationary end cover (2), and a moving conductive contact assembly (5) is inserted through the moving end cover (3). The end of the stationary conductive contact assembly (4) is round, and the end of the moving conductive contact assembly (5) is round. The ends of the stationary conductive contact assembly (4) and the moving conductive contact assembly (5) are fitted together. A mating block (7) is fixed to the end of the stationary conductive contact assembly (4), and a mating groove (6) is opened at the end of the moving conductive contact assembly (5). The mating block (7) and the mating groove (6) are inserted together.

2. The vacuum interrupter according to claim 1, characterized in that, The docking block (7) and the docking groove (6) are both set to the shape of a "+", the surface of the docking groove (6) is larger than the area of ​​the docking block (7), and the sides of the docking groove (6) and the docking block (7) that are close to each other are both set to rounded corners.

3. A vacuum interrupter according to claim 1, characterized in that, The inner wall of the insulating shell (1) is provided with a recessed annular groove (9). A shielding cover assembly is snapped onto the inner wall of the insulating shell (1). The shielding cover assembly includes a shielding cover middle part (10). The shielding cover middle part (10) is snapped onto the recessed annular groove (9). Shielding cover end parts (11) are fixed to both ends of the shielding cover middle part (10). The shielding cover end parts (11) are in contact with the inner wall of the insulating shell (1). The static conductive contact assembly (4) and the dynamic conductive contact assembly (5) are located inside the shielding cover assembly.

4. A vacuum interrupter according to claim 3, characterized in that, The inner wall of the insulating shell (1) has multiple sets of slots (13), which are located at both ends of the shielding assembly. Both ends of the shielding assembly are fixed with a plate (12), which engages with the slot (13).

5. A vacuum interrupter according to claim 1, characterized in that, The bolts (8) are provided in multiple sets, and the multiple sets of bolts (8) are arranged in a circumferential array. The static conductive contact assembly (4) and the dynamic conductive contact assembly (5) are coaxial.

6. A vacuum interrupter according to claim 1, characterized in that, The insulating shell (1) has mounting grooves (14) at both ends. Sealing rings (15) are snapped into the two sets of mounting grooves (14). The stationary end cover (2) and the moving end cover (3) are respectively squeezed into the two sets of sealing rings (15). A limiting ring (16) is fixed to the side of the mounting groove (14) near the axis of the insulating shell (1) to prevent the sealing rings (15) from falling off.

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