CN215527566U

CN215527566U - Circuit breaker

Info

Publication number: CN215527566U
Application number: CN202122084713.9U
Authority: CN
Inventors: 汤仲伟; 朱佳梦
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-01-14
Anticipated expiration: 2031-08-31

Abstract

A circuit breaker belongs to the technical field of medium-voltage electrical appliances. A circuit breaker comprises a shell, an upper bracket, an upper wire outlet seat, a vacuum arc extinguish chamber, a copper foil flexible connection, a lower wire outlet seat and an insulating pull rod, wherein the upper bracket, the upper wire outlet seat, the vacuum arc extinguish chamber, the copper foil flexible connection, the lower wire outlet seat and the insulating pull rod are arranged in the shell; the upper bracket is fixedly arranged on the static end of the vacuum arc-extinguishing chamber and is electrically connected with the upper wire outlet seat; one end of the copper foil flexible connection is electrically connected with the movable end of the vacuum arc-extinguishing chamber, and the other end of the copper foil flexible connection is electrically connected with the lower wire outlet seat; the insulating pull rod is fixedly connected with the movable end of the vacuum arc-extinguishing chamber, the insulating pull rod drives the movable end to move to realize switching on and switching off of the circuit breaker, and at least one flexible connection positioning device is arranged between the flexible connection of the copper foil and the movable end of the vacuum arc-extinguishing chamber, so that the flexible connection of the copper foil is used for keeping a connecting part fixed with the lower wire outlet seat at a preset position. The advantages are that: the connecting structure is simple, the upper support and the center of the flexible connection can be kept on the same straight line, and the upper and lower wire outlet seats can be conveniently and smoothly installed.

Description

Circuit breaker

Technical Field

The utility model belongs to the field of medium-voltage electric appliances, and particularly relates to a circuit breaker.

Background

With the development of social economy, the demand of various industries in society on high-voltage electrical equipment is on a trend of increasing year by year. Along with the promotion of national rural power grid transformation, the demand of the market for high-voltage circuit breaker products is greatly increased. The high-voltage circuit breaker product plays an important role in the middle of converting high-voltage transmission to low-voltage (user) power distribution and plays an important role in the safe operation of a power system.

Under the intense competitive environment of market, many manufacturers optimize the primary part of a 12kV indoor high-voltage circuit breaker, the cost is reduced by adopting the insulating cylinder assembly without a lower bracket and a conductive clamp, and the structure only needs to connect the movable end of an arc extinguish chamber and a lower wire outlet seat through copper foil flexible connection. However, how to keep the mounting centers of the upper bracket and the flexible connection of the copper foil on the same straight line so as to smoothly mount the upper and lower wire outlet bases is a difficulty of the structure. Referring to fig. 1, the original installation method of the copper foil flexible connection 4 is to screw a nut on the threaded end of the insulating pull rod 5, then the threaded end sequentially passes through the disc spring, the washer and the copper foil flexible connection 4 until the threaded end is screwed into the threaded hole at the movable end of the vacuum arc-extinguishing chamber 3, and then the copper foil flexible connection 4 is ensured not to rotate when the nut is screwed through a tool.

In view of the above-mentioned prior art, there is a need for an improved structure of the existing circuit breaker. The applicant has therefore made an advantageous design, in the context of which the solution to be described below is made.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a circuit breaker which has few parts and simple connection structure and can keep the flexible connection of copper foils at a preset position.

The utility model aims to achieve the purpose, and the circuit breaker comprises a shell, an upper bracket, an upper wire outlet seat, a vacuum arc extinguish chamber, a copper foil flexible connection, a lower wire outlet seat and an insulating pull rod, wherein the upper bracket, the upper wire outlet seat, the vacuum arc extinguish chamber, the copper foil flexible connection, the lower wire outlet seat and the insulating pull rod are arranged in the shell; the upper bracket is fixedly arranged on the static end of the vacuum arc-extinguishing chamber and is electrically connected with the upper wire outlet seat; one end of the copper foil flexible connection is electrically connected with the movable end of the vacuum arc-extinguishing chamber, and the other end of the copper foil flexible connection is electrically connected with the lower wire outlet seat; the insulating pull rod is fixedly connected with the movable end of the vacuum arc-extinguishing chamber, the insulating pull rod drives the movable end to move to realize switching on and switching off of the circuit breaker, and at least one flexible connection positioning device is arranged between the flexible connection of the copper foil and the movable end of the vacuum arc-extinguishing chamber, so that the flexible connection of the copper foil is used for keeping a connecting part fixed with the lower wire outlet seat at a preset position.

In a specific embodiment of the utility model, the copper foil flexible connection part is provided with a connecting part mounting hole, the upper bracket is provided with an upper bracket mounting hole corresponding to the connecting part mounting hole, and the mounting center of the connecting part mounting hole and the mounting center of the upper bracket mounting hole are kept on the same straight line in the vertical direction.

In another specific embodiment of the present invention, the flexible connection positioning device includes a positioning groove, a positioning hole and a positioning pin, the positioning groove is longitudinally disposed on the outer circumferential surface of the movable end, the positioning hole is disposed on the flexible connection of the copper foil and corresponds to the positioning groove in position, and the positioning pin passes through the positioning hole and is disposed in the positioning groove, so that the flexible connection of the copper foil cannot rotate relative to the movable end.

In another specific embodiment of the present invention, the copper foil flexible connection further includes a mounting portion, the mounting portion is provided with a through hole, the movable end of the insulating pull rod facing the vacuum arc-extinguishing chamber is provided with a threaded end, the mounting portion is sleeved on the threaded end of the insulating pull rod through the through hole, and the threaded end is connected with the movable end of the vacuum arc-extinguishing chamber.

In another specific embodiment of the present invention, the number of the flexible connection positioning devices is two, and the flexible connection positioning devices are symmetrically distributed based on the movable end of the vacuum arc-extinguishing chamber.

In a further specific embodiment of the present invention, the number of the flexible connection positioning devices is three, and the flexible connection positioning devices are distributed in trisection based on the movable end of the vacuum arc-extinguishing chamber.

The utility model positions the installation of the copper foil flexible connection by additionally arranging the flexible connection positioning device, and compared with the prior art, the utility model has the beneficial effects that: spare part is few, and connection structure is simple, can guarantee that the flexible coupling is used for keeping in a predetermined position with the fixed connecting portion of lower wire outlet seat, conveniently installs upper and lower wire outlet seat smoothly.

Drawings

Fig. 1 is a schematic structural diagram of a conventional circuit breaker.

Fig. 2 is a schematic view of the overall structure of the present invention.

Fig. 3 is an assembly schematic diagram of the vacuum arc-extinguishing chamber, the copper foil flexible connection and the insulating pull rod.

Fig. 4 is a schematic view of an embodiment of the copper foil flexible connection positioning device.

Fig. 5 is a schematic view of another embodiment of the copper foil flexible connection positioning device.

In the figure: 1. a housing; 2. an upper wire outlet seat; 3. vacuum arc-extinguishing chamber, 31, static end, 32, dynamic end, 321, positioning groove; 4. copper foil flexible connection, 41 mounting part, 411 through hole, 412 positioning hole, 42 connecting part, 421 connecting part mounting hole; 5. insulating tie rod, 51, threaded end; 6. a lower wire outlet seat; 7. an upper bracket, 71, an upper bracket mounting hole; 8. positioning pins; 9. and a nut.

Detailed Description

The following detailed description of the embodiments of the present invention will be described with reference to the accompanying drawings, but the description of the embodiments is not intended to limit the technical solutions, and any changes in form and not essential to the inventive concept should be regarded as the protection scope of the present invention.

In the following description, any concept related to the directionality (or the directional nature) of up, down, left, right, front, and rear is intended to facilitate understanding by the public, and thus should not be construed as particularly limiting the technical solution provided by the present invention, with respect to the position state in which the drawings are being described.

Example 1:

referring to fig. 2 and 3, the present invention relates to a circuit breaker, which includes a housing 1, and an upper bracket 7, an upper wire outlet base 2, a vacuum arc-extinguishing chamber 3, a copper foil flexible connection 4, a lower wire outlet base 6, and an insulating pull rod 5 disposed in the housing 1. The housing 1 is an insulating sleeve, and in this embodiment, the insulating sleeve is formed by pouring epoxy resin by using an APG process. The upper bracket 7 is fixedly arranged at the static end 31 of the vacuum arc-extinguishing chamber 3, one end of the upper wire outlet seat 2 is fixedly arranged on the upper bracket 7 and is electrically connected with the upper bracket 7, and the other end of the upper wire outlet seat is connected with an upper contact arm (not shown in the figure) to realize electrical connection. One end of the copper foil flexible connection 4 is electrically connected with the movable end 32 of the vacuum arc-extinguishing chamber 3, the other end of the copper foil flexible connection is electrically connected with the lower wire outlet seat 6, and the other end of the lower wire outlet seat 6 is electrically connected with a lower contact arm (not shown in the figure). The circuit breaker is connected with an external circuit through the plum blossom-shaped contact jointed on the upper contact arm and the lower contact arm, so that a conductive loop structure is formed. One end of the insulating pull rod 5 is fixedly connected with the movable end 32 of the vacuum arc-extinguishing chamber 3, and the other end is connected with an operating mechanism of the circuit breaker. When the operating mechanism acts, the insulating pull rod 5 is driven to act, and the insulating pull rod 5 drives the moving end 32 of the vacuum arc-extinguishing chamber 3 to act to realize the switching on and switching off of the circuit breaker.

Referring to fig. 4 in conjunction with fig. 3, the copper foil flexible connection 4 includes a mounting portion 41 and a connecting portion 42, and the mounting portion 41 is provided with a through hole 411. The movable end 32 of the insulating pull rod 5 facing the vacuum arc-extinguishing chamber 3 is provided with a threaded end 51, the mounting part 41 is sleeved on the threaded end 51 of the insulating pull rod 5 through a through hole 411, and the threaded end 51 is connected with the movable end 32 of the vacuum arc-extinguishing chamber 3 through an internal threaded hole thereof. The connecting portion 42 is used for being fixed with the lower wire outlet base 6, and a connecting portion mounting hole 421 is formed in the connecting portion 42.

At least one flexible connection positioning device is arranged between the flexible copper foil connection 4 and the movable end 32 of the vacuum arc-extinguishing chamber 3, so that the flexible copper foil connection 4 is used for keeping a connection part 42 fixed with the lower wire outlet seat 6 at a preset position. In this implementation, last seat 2 and the lower seat 6 of being qualified for the next round of competitions fixed like this, copper foil flexible coupling 4 on seted up two connecting portion mounting holes 421, through connecting portion mounting hole 421 will be qualified for the next round of competitions the fixed setting of seat 6 on copper foil flexible coupling 4, upper bracket 7 on be provided with two with the corresponding upper bracket mounting hole 71 of connecting portion mounting hole 421, through upper bracket mounting hole 71 with last seat 2 of being qualified for the next round of competitions fixed the setting on upper bracket 7. Further, the predetermined position of the link 42 is preferably such that the mounting center of the link mounting hole 421 and the mounting center of the upper bracket mounting hole 71 are maintained on the same straight line in the vertical direction. Specifically, the projection of the upper bracket mounting hole 71 in the copper foil flexible connection 4 direction just coincides with the connection portion mounting hole 421. Of course, the number of the upper bracket mounting holes 71 and the number of the connecting portion mounting holes 421 may be one or other numbers.

The flexible connection positioning device comprises a positioning groove 321, a positioning hole 412 and a positioning pin 8, wherein the positioning groove 321 is longitudinally arranged on the outer circumferential surface of the movable end 32, the positioning hole 412 is arranged on the mounting part 41 of the flexible copper foil connection 4 and corresponds to the positioning groove 321 in position, and the positioning pin 8 penetrates through the positioning hole 412 and is arranged in the positioning groove 321, so that the flexible copper foil connection 4 cannot rotate relative to the movable end 32. In this embodiment, the number of the flexible connection positioning devices is two, and the flexible connection positioning devices are symmetrically distributed based on the movable end 32. Namely, the number of the positioning slots 321 is two, and the two positioning slots are symmetrically distributed on the outer circumferential surface of the movable end 32. Correspondingly, the copper foil flexible connection 4 is provided with two positioning holes 412 at positions corresponding to the positioning grooves 321, and the two positioning pins 6 respectively penetrate through the two positioning holes 412 and are arranged in the corresponding positioning grooves 321, so that the copper foil flexible connection 4 is positioned.

After adopting the structure, when the insulating pull rod 5, the copper foil flexible connection 4 and the vacuum arc-extinguishing chamber 3 are assembled, firstly, the copper foil flexible connection 4 is arranged on the movable end 32, the positioning groove 321 and the positioning hole 412 are aligned and then inserted into the positioning pin 8 to realize the positioning of the copper foil flexible connection 4, then the screw thread end 51 of the insulating pull rod 5 is sleeved with the nut 9, the disc spring and the washer in sequence, then the nut, the disc spring and the washer penetrate through the through hole 411 of the copper foil flexible connection 4 and are screwed into the screw thread hole of the movable end 32, and then the copper foil flexible connection 4 and the movable end 32 are pressed tightly by screwing the nut 9, therefore, as the copper foil flexible connection 4 is positioned by the flexible connection positioning device, in the process of screwing the nut 9, the washer cannot drive the copper foil flexible connection 4 to rotate along with the nut 9 in the rotating process so as to enable the position of the connecting part 42 to deviate, and therefore, the preset position of the copper foil flexible connection 4 in the installation process can be guaranteed to be unchanged. And then the assembled components are integrally installed on the shell 1 through the upper bracket 7, then the upper wire outlet seat 2 and the lower wire outlet seat 6 are respectively connected, and finally the upper contact arm and the lower contact arm are respectively installed, so that the assembly of the whole main loop is completed.

Example 2:

referring to fig. 5, the number of the flexible connection positioning devices is three, and the flexible connection positioning devices are distributed in a trisection manner at an interval of 120 degrees. Namely, the number of the positioning slots 321 is three, and the three positioning slots are evenly distributed on the outer circumferential surface of the moving end 32. Correspondingly, the number of the positioning holes 412 is also three, and the number of the positioning pins 8 is also three. The assembly mode of the insulating pull rod 5, the copper foil flexible connection 4 and the vacuum arc-extinguishing chamber 3 is the same as that of embodiment 1, and details are not repeated here.

Claims

1. A circuit breaker comprises a shell (1), an upper bracket (7), an upper wire outlet seat (2), a vacuum arc-extinguishing chamber (3), a copper foil flexible connection (4), a lower wire outlet seat (6) and an insulating pull rod (5), wherein the upper bracket (7), the upper wire outlet seat (2), the vacuum arc-extinguishing chamber and the insulating pull rod are arranged in the shell (1); the upper bracket (7) is fixedly arranged on a static end (31) of the vacuum arc-extinguishing chamber (3) and is electrically connected with the upper wire outlet seat (2); one end of the copper foil flexible connection (4) is electrically connected with the movable end (32) of the vacuum arc-extinguishing chamber (3), and the other end of the copper foil flexible connection is electrically connected with the lower wire outlet seat (6); insulating pull rod (5) and vacuum interrupter (3) move end (32) fixed connection, insulating pull rod (5) move end (32) through driving this and move and realize the separating brake, its characterized in that of circuit breaker: at least one flexible connection positioning device is arranged between the flexible copper foil connection (4) and the movable end (32) of the vacuum arc-extinguishing chamber (3), so that the flexible copper foil connection (4) is used for keeping a connecting part (42) fixed with the lower wire outlet seat (6) at a preset position.

2. The circuit breaker according to claim 1, wherein the copper foil flexible connector (4) is provided with a connecting portion mounting hole (421) on the connecting portion (42), the upper bracket (7) is provided with an upper bracket mounting hole (71) corresponding to the connecting portion mounting hole (421), and the mounting center of the connecting portion mounting hole (421) and the mounting center of the upper bracket mounting hole (71) are maintained on the same straight line in the vertical direction.

3. The circuit breaker according to claim 1, wherein the flexible connection positioning device comprises a positioning groove (321), a positioning hole (412) and a positioning pin (8), the positioning groove (321) is longitudinally disposed on the outer circumferential surface of the movable terminal (32), the positioning hole (412) is disposed on the flexible copper foil connection (4) and corresponds to the positioning groove (321), and the positioning pin (8) is disposed in the positioning groove (321) through the positioning hole (412), such that the flexible copper foil connection (4) cannot rotate relative to the movable terminal (32).

4. The circuit breaker according to claim 2, characterized in that copper foil flexible coupling (4) still include installation department (41), installation department (41) on be provided with through-hole (411), insulating pull rod (5) be provided with screw thread end (51) towards vacuum interrupter's (3) end of moving (32), installation department (41) are established on screw thread end (51) of insulating pull rod (5) through-hole (411), screw thread end (51) link to each other with vacuum interrupter's (3) end of moving (32) again.

5. A circuit breaker according to claim 1, characterized in that the number of said flexible connection positioning means is two, and is based on the symmetrical distribution of the moving ends (32) of the vacuum interrupter (3).

6. A circuit breaker according to claim 1, characterized in that the number of said flexible connection positioning means is three, and is trisected based on the moving end (32) of the vacuum interrupter (3).