High-speed vacuum circuit breaker

Abstract

The utility model discloses a high-speed vacuum circuit breaker, which belongs to the technical field of vacuum circuit breakers and comprises a circuit breaker main body box, a solid-sealed polar pole and a fixing assembly. The fixing assembly comprises a pole base and a fixing groove, the interior of the fixing groove is matched with the surface of the pole base, the pole base is connected to the inner wall of the fixing groove, and limiting mechanisms are arranged between the two sides of the pole base and the two sides of the interior of the fixing groove; the pole base is mounted in an inner cavity of the fixing groove through the two groups of limiting mechanisms; through cooperative use of the pole base, the fixing groove and the limiting mechanism, the embedded pole and the circuit breaker main body box can be conveniently assembled or disassembled, the operation is simple, convenient and rapid, the problem that the surface of a part is abraded or rusted can be reduced, the problem that the fixing assembly cannot achieve the effect of fixed installation after being used for many times is avoided, and the service life of the fixed assembly is prolonged. And the practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum circuit breakers, in particular to a high-speed vacuum circuit breaker. Background Art

[0002] Vacuum circuit breakers are named for their arc-extinguishing medium and the insulating medium in the contact gap after arc extinguishing, both of which are high vacuum. They are small, lightweight, suitable for frequent operation, and require no maintenance for arc extinguishing, making them widely used in distribution networks. Vacuum circuit breakers are indoor power distribution devices in three-phase AC systems, used to protect and control electrical equipment in industrial and mining enterprises, power plants, and substations. They are particularly suitable for use in locations that require oil-free operation, minimal maintenance, and frequent operation. Circuit breakers can be installed in central cabinets, double-layer cabinets, and fixed cabinets to control and protect high-voltage electrical equipment. However, the fixed poles of some existing vacuum circuit breakers are typically fixed to the housing using screws and screw holes. Repeated installation and removal of the fixed poles can easily cause thread slippage between the screws and screw holes, affecting installation and making maintenance difficult.

[0003] For example, the Chinese patent application number CN216980434U discloses a high-voltage bistable side-acting high-speed vacuum circuit breaker, which includes a main box of the circuit breaker, a plurality of equally spaced pole bases are arranged on the top of the main box of the circuit breaker, an insulating shell is provided on the top of the pole base, and a lower outlet terminal and an upper outlet terminal are provided on the front of the insulating shell in sequence from the bottom to the top; a heat dissipation reinforcement sleeve is provided on the top of the insulating shell and located between the lower outlet terminal and the upper outlet terminal, and a vacuum arc chamber is provided on the top of the insulating shell; a moving conductive rod is provided at the bottom of the vacuum arc chamber, a screw is provided at the bottom of the moving conductive rod, an insulating pull rod is provided at the bottom of the screw, and a buffer connector is provided on the outer side of the screw.

[0004] The high-voltage bistable side-acting high-speed vacuum circuit breaker in the above-mentioned patent also has the problem of being inconvenient to install or disassemble the sealed pole, so we need to propose a high-speed vacuum circuit breaker. Utility Model Content

[0005] The purpose of the present invention is to provide a high-speed vacuum circuit breaker having a structure that facilitates installation or disassembly of a sealed pole, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions: a high-speed vacuum circuit breaker, comprising a circuit breaker main body box, wherein three sets of sealed poles are provided at corresponding locations above the circuit breaker main body box, and a fixing assembly is provided between the bottom of the sealed poles and the top of the circuit breaker main body box to facilitate installation or removal of the sealed poles;

[0007] The fixing assembly includes a pole base fixedly mounted on the bottom of the sealed pole and a fixing groove opened on the top of the circuit breaker main box. The interior of the fixing groove is adapted to the surface of the pole base, and the pole base is slidably connected to the inner wall of the fixing groove. Limiting mechanisms are provided between the two sides of the pole base and the two sides of the interior of the fixing groove. The pole base is fixedly mounted on the inner cavity of the fixing groove by two groups of the limiting mechanisms.

[0008] Preferably, the limiting mechanism includes a limiting cavity opened on the top of the circuit breaker main box and located on one side of the fixing slot, a sliding plate is adapted to be provided inside the limiting cavity, and both ends of one side of the sliding plate are fixedly connected to a limiting block.

[0009] Preferably, the limiting mechanism also includes limiting slots opened at both ends of one side of the pole base, the two groups of limiting slots are respectively arranged corresponding to the two groups of limiting blocks, and the surfaces of one end of the two groups of limiting blocks are respectively slidably connected to the inner cavities of the two groups of limiting slots.

[0010] Preferably, the limiting mechanism also includes a sliding groove extending through the bottom end of the limiting cavity, a sliding rod is adapted to be provided inside the sliding groove, and the surface of the sliding rod is slidably connected to the inside of the sliding groove, and the top of the sliding rod is fixedly connected to the bottom of the sliding plate.

[0011] Preferably, three groups of telescopic springs are evenly and fixedly mounted on the inner wall of one end of the limiting cavity, and one end of the three groups of telescopic springs is fixedly connected to one side of the sliding plate.

[0012] Preferably, the sealed pole includes an insulating shell fixedly mounted on the top of the pole base, an upper outlet terminal is fixedly mounted on the top of the insulating shell, and a lower outlet terminal is fixedly connected to one end of the surface of the insulating shell and located below the upper outlet terminal.

[0013] Preferably, a vacuum arc extinguishing chamber is opened at the upper end of the interior of the insulating shell, a heat dissipation sleeve is fixedly installed on the outside of the vacuum arc extinguishing chamber and on the surface of the insulating shell, and a cooling liquid cavity is provided between the inner wall of the heat dissipation sleeve and the surface of the insulating shell.

[0014] Preferably, a plurality of groups of heat dissipation fins are fixedly mounted on the surface of the heat dissipation sleeve, and the top and bottom of the heat dissipation sleeve are fixedly connected with liquid inlet and outlet pipes.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The utility model can facilitate the installation or disassembly between the sealed pole and the circuit breaker main box through the coordinated use of the pole base, the fixing groove and the limiting mechanism. The operation is simple, convenient and fast, and can also reduce the problem of wear or rust on the surface of parts, avoid the fixing component from failing to achieve the fixed installation effect after repeated use, and improve the practicality of the device.

[0017] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be achieved and obtained by the structures indicated in the description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the separation structure of the pole base and the fixing slot of the utility model;

[0020] Figure 3 This is a schematic diagram of the top cross-sectional structure of the main box of the circuit breaker of the present utility model;

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the limiting cavity of the utility model;

[0022] Figure 5 It is a schematic diagram of the cross-sectional structure of the solid-sealed pole of the utility model.

[0023] In the figure: 1. Circuit breaker main box; 2. Sealed pole; 201. Insulating shell; 202. Upper outlet terminal; 203. Lower outlet terminal; 204. Vacuum interrupter; 205. Heat dissipation sleeve; 206. Cooling liquid cavity; 207. Heat dissipation fin; 208. Liquid inlet and outlet pipes; 3. Pole base; 4. Fixing groove; 5. Limiting mechanism; 501. Limiting cavity; 502. Sliding plate; 503. Limiting block; 504. Limiting slot hole; 505. Sliding groove; 506. Sliding rod; 507. Telescopic spring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-5The utility model provides a technical solution: a high-speed vacuum circuit breaker, including a circuit breaker main box 1, a sealed pole 2 and a fixing component.

[0026] Preferably, three groups of sealed poles 2 are provided at corresponding positions above the circuit breaker main box 1, and a fixing assembly for facilitating installation or removal of the sealed poles 2 is provided between the bottom of the sealed poles 2 and the top of the circuit breaker main box 1.

[0027] Preferably, the fixing assembly includes: a pole base 3, a fixing groove 4 and a limiting mechanism 5. The top of the pole base 3 is fixedly installed on the bottom of the sealed pole 2. The fixing groove 4 is opened on the top of the circuit breaker main box 1. The interior of the fixing groove 4 is adapted to the surface of the pole base 3, and the pole base 3 is slidably connected to the inner wall of the fixing groove 4. Limiting mechanisms 5 are provided between both sides of the pole base 3 and both sides of the interior of the fixing groove 4. The pole base 3 is fixedly installed in the inner cavity of the fixing groove 4 through two sets of limiting mechanisms 5.

[0028] Specifically, by cooperating with the pole base 3, the fixing groove 4 and the limiting mechanism 5, the pole base 3 at the bottom of the sealed pole 2 is placed in the fixing groove 4, and then the pole base 3 is limited and fixed by the limiting mechanism 5. At the same time, most of the components of the limiting mechanism 5 are arranged at the upper end of the circuit breaker main box 1, which can reduce the contact between the limiting mechanism 5 and the outside world, thereby facilitating the installation or disassembly between the sealed pole 2 and the circuit breaker main box 1. The operation is simple, convenient and fast, and can also reduce the problem of wear or rust on the surface of parts, avoid the problem of the fixing components failing to achieve the fixed installation effect after repeated use, and improve the practicality of the device.

[0029] Preferably, the limiting mechanism 5 includes: a limiting cavity 501, a sliding plate 502, a limiting block 503, a limiting slot 504, a sliding slot 505, a sliding rod 506 and a telescopic spring 507. The limiting cavity 501 is opened at the top of the circuit breaker main box 1 and is located on one side of the fixed slot 4. The interior of the limiting cavity 501 is adapted to be provided with a sliding plate 502. Both ends of one side of the sliding plate 502 are fixedly connected to the limiting block 503. Two groups of limiting slots 504 are respectively opened at both ends of one side of the pole base 3. The two groups of limiting slots 504 are respectively arranged corresponding to the two groups of limiting blocks 503. , and the surfaces of one end of the two groups of limit blocks 503 are respectively slidably connected with the inner cavities of the two groups of limit slots 504, the sliding groove 505 runs through the bottom end of the limit cavity 501, and the interior of the sliding groove 505 is adapted to be provided with a sliding rod 506, and the surface of the sliding rod 506 is slidably connected to the interior of the sliding groove 505, the top of the sliding rod 506 is fixedly connected to the bottom of the sliding plate 502, and three groups of telescopic springs 507 are evenly fixedly installed on the inner wall of one end of the limit cavity 501, and one end of the three groups of telescopic springs 507 is fixedly connected to one side of the sliding plate 502.

[0030] Preferably, the sealed pole 2 includes: an insulating shell 201, an upper outlet terminal 202, a lower outlet terminal 203, a vacuum interrupter 204, a heat dissipation sleeve 205, a cooling liquid cavity 206, cooling fins 207 and an inlet and outlet pipe 208. The insulating shell 201 is fixedly installed on the top of the pole base 3. The upper outlet terminal 202 is fixedly installed on the top of the insulating shell 201. The lower outlet terminal 203 is fixedly connected to one end of the surface of the insulating shell 201 and located below the upper outlet terminal 202. A vacuum interrupter 204 is opened at the upper end of the interior of the insulating shell 201. The outer side of the vacuum interrupter 204 is located on the surface of the insulating shell 201 and is fixedly installed with a heat dissipation sleeve 205. A cooling liquid cavity 206 is provided between the inner wall of the heat dissipation sleeve 205 and the surface of the insulating shell 201. Several groups of heat dissipation fins 207 are fixedly installed on the surface of the heat dissipation sleeve 205. The top and bottom of the heat dissipation sleeve 205 are fixedly connected with the inlet and outlet pipes 208.

[0031] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-speed vacuum circuit breaker, characterized in that: The circuit breaker comprises a main box (1), wherein three groups of sealed poles (2) are arranged at corresponding positions above the main box (1), and a fixing assembly for facilitating installation or removal of the sealed poles (2) is arranged between the bottom of the sealed poles (2) and the top of the main box (1); The fixing assembly comprises a pole base (3) fixedly mounted on the bottom of the sealed pole (2) and a fixing groove (4) opened on the top of the circuit breaker main box (1); the interior of the fixing groove (4) is adapted to the surface of the pole base (3), and the pole base (3) is slidably connected to the inner wall of the fixing groove (4); limiting mechanisms (5) are arranged between the two sides of the pole base (3) and the two sides of the interior of the fixing groove (4); the pole base (3) is fixedly mounted in the inner cavity of the fixing groove (4) through two groups of limiting mechanisms (5).

2. A high-speed vacuum circuit breaker according to claim 1, characterized in that: The limiting mechanism (5) comprises a limiting cavity (501) opened at the top of the circuit breaker main box (1) and located on one side of the fixing groove (4); a sliding plate (502) is adapted to be arranged inside the limiting cavity (501); and both ends of one side of the sliding plate (502) are fixedly connected to a limiting block (503).

3. A high-speed vacuum circuit breaker according to claim 2, characterized in that: The limiting mechanism (5) further comprises limiting slots (504) provided at both ends of one side of the pole base (3); the two groups of limiting slots (504) are respectively arranged corresponding to the two groups of limiting blocks (503); and the surfaces of one end of the two groups of limiting blocks (503) are respectively slidably connected to the inner cavities of the two groups of limiting slots (504).

4. A high-speed vacuum circuit breaker according to claim 3, characterized in that: The limiting mechanism (5) further comprises a sliding groove (505) extending through the bottom end of the limiting cavity (501), a sliding rod (506) being adapted to be arranged inside the sliding groove (505), and a surface of the sliding rod (506) being slidably connected to the inside of the sliding groove (505), and a top of the sliding rod (506) being fixedly connected to a bottom of the sliding plate (502).

5. A high-speed vacuum circuit breaker according to claim 4, characterized in that: Three groups of telescopic springs (507) are evenly and fixedly installed on the inner wall of one end of the limiting cavity (501), and one end of the three groups of telescopic springs (507) is fixedly connected to one side of the sliding plate (502).

6. A high-speed vacuum circuit breaker according to claim 1, characterized in that: The sealed pole (2) comprises an insulating shell (201) fixedly mounted on the top of the pole base (3); an upper outlet terminal (202) is fixedly mounted on the top of the insulating shell (201); and a lower outlet terminal (203) is fixedly connected to one end of the surface of the insulating shell (201) and located below the upper outlet terminal (202) at a corresponding position.

7. A high-speed vacuum circuit breaker according to claim 6, characterized in that: A vacuum arc extinguishing chamber (204) is provided at the upper end of the interior of the insulating shell (201); a heat dissipation sleeve (205) is fixedly installed on the surface of the insulating shell (201) outside the vacuum arc extinguishing chamber (204); and a cooling liquid chamber (206) is provided between the inner wall of the heat dissipation sleeve (205) and the surface of the insulating shell (201).

8. A high-speed vacuum circuit breaker according to claim 7, characterized in that: A plurality of groups of heat dissipation fins (207) are fixedly mounted on the surface of the heat dissipation sleeve (205), and the top and bottom of the heat dissipation sleeve (205) are fixedly connected with liquid inlet and outlet pipes (208).

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