CN211700158U

CN211700158U - Circuit breaker for ring main unit

Info

Publication number: CN211700158U
Application number: CN202020401241.8U
Authority: CN
Inventors: 张建华; 王拥军; 张黎明; 丁亮亮
Original assignee: Nantong Taifu Electrical Manufacturing Co Ltd
Current assignee: Gotion High Tech Co Ltd
Priority date: 2020-03-25
Filing date: 2020-03-25
Publication date: 2020-10-16
Anticipated expiration: 2030-03-25

Abstract

The utility model discloses a circuit breaker for a ring main unit, which comprises a circuit breaker cabinet; the circuit breaker cabinet is detachably connected with the ring main unit; an insulating handle is arranged in the middle of the left side face of the breaker cabinet; a ventilation pipe penetrating through the circuit breaker cabinet is arranged above the insulating handle; a circuit breaker is arranged in the circuit breaker cabinet; the circuit breaker includes a housing; the shell is a hollow insulating cavity; a cylindrical slidable cavity is transversely arranged in the middle of the hollow insulating cavity; the upper end and the lower end of the slidable cavity are correspondingly provided with a first terminal and a second terminal; a pyrotechnic gas generator is arranged at the right end of the slidable cavity; the left end of the pyrotechnic gas generator is provided with a gas expansion chamber; the left side of the gas expansion chamber is provided with a sliding assembly; the sliding component is movably connected with the slidable cavity; the sliding assembly comprises a guide post; the upper end of the guide post is sleeved with an insulating sliding tube. The utility model discloses not only occupation space is little, the maintenance is changed conveniently, has strengthened the radiating effect moreover, can extensively be applicable to each looped netowrk cabinet.

Description

Circuit breaker for ring main unit

Technical Field

The utility model relates to a circuit breaker especially relates to a circuit breaker for looped netowrk cabinet.

Background

The circuit breaker is a device which can close current infrequently in a normal circuit and has certain overload and short-circuit protection capability. The short-circuit protection function of the circuit breaker is mainly to realize the disconnection of a fault circuit through the cooperation of an electromagnetic system, an arc extinguishing device and an operating mechanism thereof, thereby playing a role in circuit protection. The short-circuit protection function of the circuit breaker has the characteristic of short time for breaking the short-circuit current, and can protect the load of the power transmission and distribution system from being damaged by the short-circuit current. When the circuit breaker is operated, a strong arc is instantaneously generated due to the presence of a high voltage. The arc extinguishing system is mainly used for interrupting or extinguishing electric arcs generated when a current-carrying contact is disconnected and is mainly installed in a circuit breaker or a motor protection short-circuit switch.

In order to protect the circuit breaker subassembly, often with the orderly installation of circuit breaker in the circuit breaker cabinet, because of common circuit breaker cabinet design is simple, do not have effectual ventilation structure, the radiating effect is poor, lead to circuit breaker cabinet and relevant subassembly extremely to take place to corrode etc. and be unfavorable for the circuit breaker to carry out the problem of normal work, solid insulation looped netowrk cabinet circuit breaker mechanism on the existing market adopts the main shaft rotation mode mostly moreover, arrange perpendicularly, the space occupies great, the mechanism part is many, can't adorn into the part module in advance, the maintenance is changed complicacy.

SUMMERY OF THE UTILITY MODEL

In order to solve the weak point that above-mentioned technique exists, the utility model provides a circuit breaker for looped netowrk cabinet.

In order to solve the technical problem, the utility model discloses a technical scheme is: a circuit breaker for a ring main unit comprises a circuit breaker cabinet; the circuit breaker cabinet is detachably connected with the ring main unit; the breaker cabinet is drawer-shaped; an insulating handle is arranged in the middle of the left side face of the breaker cabinet; a ventilation pipe penetrating through the circuit breaker cabinet is arranged above the insulating handle; a circuit breaker is arranged in the circuit breaker cabinet;

the circuit breaker includes a housing; the shell is a hollow insulating cavity; a cylindrical slidable cavity is transversely arranged in the middle of the hollow insulating cavity; the upper end and the lower end of the slidable cavity are correspondingly provided with a first terminal and a second terminal; a pyrotechnic gas generator is arranged at the right end of the slidable cavity; the left end of the pyrotechnic gas generator is provided with a gas expansion chamber; the left side of the gas expansion chamber is provided with a sliding assembly; the sliding component is movably connected with the slidable cavity; the sliding assembly comprises a guide post; the upper end of the guide post is sleeved with an insulating sliding tube; the insulating sliding tube is sleeved with a conductive tube; the upper end and the upper end of the conductive tube are respectively and electrically connected with the first terminal and the second terminal.

Furthermore, sliding grooves are symmetrically arranged on the inner wall of the slidable cavity; the outer wall of the sliding component is correspondingly provided with a sliding block; the sliding component is connected with the sliding cavity in a sliding way through the sliding block.

Further, the first terminal is positioned on the left side of the second terminal; the inner side surfaces of the first terminal and the second terminal are flush with the inner wall of the slidable cavity; the first terminal and the second terminal are parallel to each other and have the same size.

Furthermore, the upper end and the lower end of the shell are respectively provided with a fixing groove; the first terminal and the second terminal are respectively fastened and connected with the fixing groove.

Further, the guide post is positioned in the slidable cavity; the top of the slidable cavity is provided with a closed cavity, and a pyrotechnic gas generator is arranged in the closed cavity.

Furthermore, the left end and the right end of the conductive tube are both provided with an exhaust channel.

Furthermore, the middle part of the insulating handle is detachably connected through a buckle.

Further, the ventilation duct is connected with a fan located outside the circuit breaker cabinet.

Furthermore, sliding grooves are symmetrically formed in the bottom ends of the front side face and the rear side face of the circuit breaker cabinet; the circuit breaker cabinet is movably connected with the ring main unit through a chute.

The utility model discloses not only occupation space is little, the maintenance is changed conveniently, and the radiating effect is good moreover, has guaranteed that the circuit breaker can normally work, has strengthened the safety in utilization simultaneously, has extensive suitability.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic cross-sectional view of fig. 1.

Fig. 3 is a schematic structural diagram of the first terminal and the second terminal in fig. 2 when they are disconnected.

In the figure: 1. a first terminal; 2. a second terminal; 3. a hollow insulating cavity; 4. a slidable cavity; 5. a pyrotechnic gas generator; 6. a gas expansion chamber; 7. a sliding assembly; 8. a guide post; 9. a conductive tube; 10. an insulated handle; 11. a vent pipe; 12. a chute; 13. a fan.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The circuit breaker for the ring main unit shown in fig. 1 to 3 comprises a circuit breaker cabinet; the circuit breaker cabinet is detachably connected with the ring main unit; the breaker cabinet is drawer-shaped; chutes 12 are symmetrically arranged at the bottom ends of the front side surface and the rear side surface of the circuit breaker cabinet; the circuit breaker cabinet is movably connected with the ring main unit through a chute 12. The breaker cabinet is guided into the ring main unit in a sliding mode, namely, the breaker cabinet is configured in a mode of placing a book table drawer, so that the maintenance and replacement of the breaker can be completed in a short time. Accomodate the circuit breaker in the circuit breaker cabinet alone to utilize the conversion bus to provide the effect of maintaining and changing the circuit breaker under the condition of not interrupting the power supply, guarantee promptly that the supply of electric power does not break off, guarantee again can in time maintain and change the circuit breaker.

An insulating handle 10 is arranged in the middle of the left side surface of the breaker cabinet; the middle part of the insulated handle 10 is detachably connected through a buckle; when dismouting circuit breaker cabinet, the buckle combination is in the same place, and the back is accomplished in the installation, opens the buckle, is connected it with the looped netowrk cabinet body respectively, plays the effect of fixed circuit breaker cabinet.

A ventilation pipe 11 penetrating through the circuit breaker cabinet is arranged above the insulating handle 10; the ventilation duct 11 is connected to a fan 13 located outside the circuit breaker cabinet. The heat generated by the breaker cabinet is taken away by the fan, so that the heat dissipation effect is improved, the breaker cabinet and related components are prevented from being corroded, and the normal work of the breaker is ensured; a circuit breaker is arranged in the circuit breaker cabinet;

the circuit breaker includes a housing; the shell is a hollow insulating cavity 3; a cylindrical slidable cavity 4 is transversely arranged in the middle of the hollow insulating cavity 3; the upper end and the lower end of the slidable cavity 4 are correspondingly provided with a first terminal 1 and a second terminal 2; the right end of the slidable cavity 4 is provided with a pyrotechnic gas generator 5; the left end of the pyrotechnic gas generator 5 is provided with a gas expansion chamber 6; the left side of the gas expansion chamber 6 is provided with a sliding assembly 7; the sliding component 7 is movably connected with the sliding cavity 4; the sliding assembly 7 comprises a guide post 8; the upper end of the guide post 8 is sleeved with an insulating sliding tube; a conductive tube 9 is sleeved outside the insulating sliding tube; the insulating sliding tube transmits the pressure generated by the gas in the gas expansion chamber 6 to the conductive tube 9, drives the conductive tube 9 to slide left and right along the guide post 8 and opens or cuts off the circuit by moving the conductive tube 9; the upper end and the upper end of the conductive tube 9 are respectively and electrically connected with the first terminal 1 and the second terminal 2;

the first terminal 1 is positioned on the left side of the second terminal 2; the inner side surfaces of the first terminal 1 and the second terminal 2 are flush with the inner wall of the slidable cavity 4; the first terminal 1 and the second terminal 2 are parallel to each other and have the same size. Any electrical circuit connected to the first terminal 1 and the second terminal 2 forms a circuit breaking. The upper end and the lower end of the shell are respectively provided with a fixed groove; the first terminal 1 and the second terminal 2 are respectively connected with the fixing groove in a fastening mode. The first terminal 1 and the second terminal 2 protrude out of the hollow insulating cavity 3 so as to be connected to an external circuit of the circuit breaker.

A pyrotechnic gas generator 5 is mounted in the hollow body so as to communicate with the slidable cavity 4. As shown in fig. 2, in the initial position where the insulating sliding tube is in contact with the pyrotechnic gas generator 5, when the gas expansion chamber 6 is reduced to the minimum volume, the first and

second terminals

1 and 2 are electrically connected to each other through the conductive tube 9 in the initial position (fig. 2), the electrical contact is established through the entire conductive tube 9, and the first and

second terminals

1 and 2 are in close contact with the conductive tube 9 of the sliding assembly in the initial position; when the contact tube 9 is moved to the off position (as shown in fig. 3) within the slidable cavity 4, during ignition of the pyrotechnic gas generator 5, the electrical connection between the first and

second terminals

1, 2 is broken, so that the left second terminal 2 is isolated.

The inner wall of the slidable cavity 4 is symmetrically provided with sliding grooves; the outer wall of the sliding component 7 is correspondingly provided with a sliding block; the sliding component 7 is connected with the sliding cavity 4 in a sliding way through a sliding block.

The guide post 8 is positioned in the slidable cavity 4; the guide post 8 serves as a guide element for the contact tube 9 as it moves within the slidable cavity 4. The top of the slidable cavity 4 is provided with a closed cavity, and a pyrotechnic gas generator 5 is arranged in the closed cavity. The left end and the right end of the conductive tube 9 are both provided with an exhaust channel.

The insulating sliding tube is sleeved outside the guide post 8. The conductive tube 9 has a diameter substantially equal to the diameter of the slidable cavity 4 and is slidable along the inside of the slidable cavity 4. The left end and the right end of the insulating sliding pipe are respectively provided with an exhaust channel, and each exhaust channel is respectively connected with one circular ring. The insulating sliding tube closes the gas expansion chamber 6 and allows a rapid increase in pressure in the closed environment of the chamber. The gas generated in the gas expansion chamber 6 is prevented from permeating into the first terminal 1 and the second terminal 2. The left and right exhaust passages form a calibrated passage for exhausting air out of the gas expansion chamber 6 when the insulating sliding tube is mounted to the closed cavity; an insulating sliding tube is located at the right end of the guide post 8 and functions to transmit the pressure of the gas generated in the gas expansion chamber 6 to the contact tube 9 and to allow the circuit to be broken by moving the contact tube 9. A shock pad is provided at the bottom of the slidable cavity 4. The function of the shock-absorbing pad is to reduce the impact energy of the conductive tube 9 and the insulating sliding tube when the component contacts the bottom of the hollow insulating cavity 3.

The utility model discloses a set up independent circuit breaker cabinet of dismantling, not only occupation space is little, the maintenance is changed conveniently, has strengthened the radiating effect through setting up the ventilation pipe moreover, has avoided circuit breaker cabinet and relevant subassembly to take place to corrode, has guaranteed that the circuit breaker can normally work, simultaneously through setting up flue gas formula gas generator, when guaranteeing to take place danger, the circuit breaker can in time with looped netowrk cabinet disconnection, has strengthened the safety in utilization. In addition, the ring main unit is simple in structure and convenient to disassemble, and can be widely applied to various ring main units.

The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, and the technical personnel in the technical field are in the present invention, which can also belong to the protection scope of the present invention.

Claims

1. The utility model provides a circuit breaker for looped netowrk cabinet which characterized in that: comprises a breaker cabinet; the circuit breaker cabinet is detachably connected with the ring main unit; the breaker cabinet is drawer-shaped; an insulating handle (10) is arranged in the middle of the left side surface of the breaker cabinet; a ventilation pipe (11) penetrating through the circuit breaker cabinet is arranged above the insulating handle (10); a circuit breaker is arranged in the circuit breaker cabinet;

the circuit breaker includes a housing; the shell is a hollow insulating cavity (3); a cylindrical slidable cavity (4) is transversely arranged in the middle of the hollow insulating cavity (3); the upper end and the lower end of the slidable cavity (4) are correspondingly provided with a first terminal (1) and a second terminal (2); a pyrotechnic gas generator (5) is arranged at the right end of the slidable cavity (4); the left end of the pyrotechnic gas generator (5) is provided with a gas expansion chamber (6); a sliding assembly (7) is arranged on the left side of the gas expansion chamber (6); the sliding component (7) is movably connected with the slidable cavity (4); the sliding component (7) comprises a guide post (8); an insulating sliding pipe is sleeved at the upper end of the guide column (8); a conductive tube (9) is sleeved outside the insulating sliding tube; the upper end and the upper end of the conductive tube (9) are respectively and electrically connected with the first terminal (1) and the second terminal (2).

2. The circuit breaker for the ring main unit according to claim 1, wherein: sliding grooves are symmetrically arranged on the inner wall of the slidable cavity (4); the outer wall of the sliding component (7) is correspondingly provided with a sliding block; the sliding component (7) is connected with the sliding cavity (4) in a sliding way through a sliding block.

3. The circuit breaker for ring main unit according to claim 2, characterized in that: the first terminal (1) is positioned on the left side of the second terminal (2); the inner side surfaces of the first terminal (1) and the second terminal (2) are flush with the inner wall of the slidable cavity (4); the first terminal (1) and the second terminal (2) are parallel to each other and have the same size.

4. The circuit breaker for the ring main unit according to claim 3, characterized in that: the upper end and the lower end of the shell are respectively provided with a fixing groove; the first terminal (1) and the second terminal (2) are respectively fastened and connected with the fixing grooves.

5. The circuit breaker for ring main unit according to claim 4, characterized in that: the guide post (8) is positioned in the slidable cavity (4); the top of the slidable cavity (4) is provided with a closed cavity, and a pyrotechnic gas generator (5) is arranged in the closed cavity.

6. The circuit breaker for ring main unit as claimed in claim 5, wherein: and the left end and the right end of the conductive pipe (9) are both provided with an exhaust channel.

7. The circuit breaker for ring main unit of claim 6, characterized in that: the middle part of the insulating handle (10) is detachably connected through a buckle.

8. The circuit breaker for ring main unit as claimed in claim 7, wherein: the ventilation pipe (11) is connected with a fan (13) located outside the circuit breaker cabinet.

9. The circuit breaker for the ring main unit according to any one of claims 1 to 8, wherein: the bottom ends of the front side surface and the back side surface of the circuit breaker cabinet are symmetrically provided with sliding chutes (12); the circuit breaker cabinet is movably connected with the ring main unit through a chute (12).