CN217719440U

CN217719440U - Contact holding device of high-reliability vacuum circuit breaker

Info

Publication number: CN217719440U
Application number: CN202221244457.3U
Authority: CN
Inventors: 金海勇
Original assignee: Jilin Datang Electromechanical Equipment Co ltd
Current assignee: Jilin Datang Electromechanical Equipment Co ltd
Priority date: 2022-05-23
Filing date: 2022-05-23
Publication date: 2022-11-01
Anticipated expiration: 2032-05-23

Abstract

The utility model provides a high reliability vacuum circuit breaker's contact retention device, include: the vacuum circuit breaker comprises an external board and an internal board, wherein the external board and the internal board are parallelly provided with a limiting outer barrel which penetrates through the internal board, the internal board is fixedly mounted on the internal board, an inner concave sliding groove is formed in the inner wall of the limiting outer barrel, a contact is connected with the shaft and penetrates through the limiting outer barrel, a moving contact is rotatably mounted at one end, close to the internal board, of the contact, a limiting clamping shaft is arranged on the outer wall, close to the moving contact, of the contact, the limiting clamping shaft is slidably mounted in the inner concave sliding groove, one end of a sliding shaft is fixedly mounted on a connecting plate, one end of the sliding shaft penetrates through an arc-shaped strip hole, the sliding shaft is in sliding contact with the inner wall of a strip-shaped through hole, and the vacuum circuit breaker has the effect of improving the use safety of the vacuum circuit breaker.

Description

Contact holding device of high-reliability vacuum circuit breaker

Technical Field

The utility model belongs to the technical field of the circuit breaker, in particular to high reliability vacuum circuit breaker's contact retention device.

Background

The vacuum circuit breaker is named because arc extinguishing media and insulating media in contact gaps after arc extinguishing are high vacuum, and is widely applied by the advantages of small volume, light weight and the like, and the principle of the vacuum circuit breaker is that the protection of over-current equipment is achieved through the mutual matching of moving contacts and static contacts of the circuit breaker;

in the actual structure of the existing vacuum circuit breaker, a contact closing spring is designed to have a considerable pre-compression amount and pre-pressure even if the contact closing spring is at a switching-off position. The moving contact has considerable force to resist electrodynamic force without retreating backwards when the moving contact is not in contact with a fixed contact and is subjected to pre-breakdown in the switching-on process; however, in the existing structure, when the moving contact and the static contact are in contact with each other instantly, the pressure value of the contact pressure reaches a value close to the pre-pressure value, the contact pressure is not stable enough, accidental switching-on bounce occurs, the initial contact stability becomes poor, and the use safety of the electrical equipment is further influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the technical problem that the electrical equipment security reduces because current vacuum circuit breaker's contact is relatively poor in contact initial stage stability that mentions in the background art, provides a high reliability vacuum circuit breaker's contact retention device, has the effect that improves vacuum circuit breaker safety in utilization.

The utility model provides a technical scheme does:

a contact holding device of a high reliability vacuum circuit breaker, comprising: the external plate and the internal plate are arranged in parallel and connected through a plurality of fixing columns, and arc-shaped through holes are formed in the external plate;

the limiting outer barrel penetrates through the built-in plate and is fixedly installed on the built-in plate, an inwards concave sliding groove is formed in the inner wall of the limiting outer barrel, the contact connecting shaft penetrates through the limiting outer barrel, the moving contact is rotatably installed at one end, close to the built-in plate, of the contact connecting shaft, a limiting clamping shaft is arranged on the outer wall of one end, close to the moving contact, of the contact connecting shaft, and the limiting clamping shaft is slidably installed in the inwards concave sliding groove;

the connecting plate is arranged between the internal plate and the external plate, the connecting plate is fixedly installed on the contact connecting shaft, one end of the sliding shaft is fixedly installed on the connecting plate, one end of the sliding shaft penetrates through the arc-shaped strip hole, and the sliding shaft is in sliding contact with the inner wall of the strip-shaped through hole.

Preferably, the length of the limiting clamp shaft is 8-13 mm.

Preferably, the distance between the internal plate and the external plate is 27-32 mm.

Preferably, an insulating rubber pad is fixedly mounted at one end of the sliding shaft, which is far away from the external plate.

The beneficial effects of the utility model are embodied in the following aspect:

1. the utility model discloses a set up spacing urceolus on the built-in board of circuit breaker to with the cooperation of contact even install in spacing urceolus, finally join in marriage and play limiting displacement when the closing position with spacing urceolus through the epaxial spacing calorie axle of contact even and finally even axle to the contact, can effectively prevent that locking, static contact initial stage moving contact are of value to improving vacuum circuit breaker safety in utilization because contact pressure is unstable returns and contracts that leads to.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a partially enlarged view of the contact coupling.

In the figure: the device comprises a built-in plate 1, a built-out plate 2, a fixed column 3, a contact connecting shaft 4, a moving contact 5, a connecting plate 6, a sliding shaft 7, an arc-shaped through hole 8, a limit clamping shaft 9, a limit outer cylinder 10 and an inwards concave sliding groove 11.

Detailed Description

The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.

As shown in fig. 1-2, the utility model provides a contact holding device of high reliability vacuum circuit breaker, include: the external board 2 and the internal board 1 are arranged in parallel and connected through a plurality of fixing columns 3, and the external board 2 is provided with an arc-shaped through hole 8;

the limiting outer barrel 10 penetrates through the built-in plate 1 and is fixedly mounted on the built-in plate 1, an inward concave sliding groove 11 is formed in the inner wall of the limiting outer barrel 10, the contact connecting shaft 4 penetrates through the limiting outer barrel 10, the moving contact 5 is rotatably mounted at one end, close to the built-in plate 1, of the contact connecting shaft 4, the rotating angle of the contact connecting shaft 4 can be adjusted at the initial stage of switching on by adopting rotary mounting, the angle of a limiting clamping shaft 9 on the contact connecting shaft 4 can be conveniently adjusted, the limiting or resetting switching of the limiting clamping shaft 9 is completed, a limiting clamping shaft 9 is arranged on the outer wall of one end, close to the moving contact 5, of the contact connecting shaft 4, and the limiting clamping shaft 9 can be slidably mounted in the inward concave sliding groove 11;

connecting plate 6, connecting plate 6 sets up between built-in board 1 and external board 2, connecting plate 6 fixed mounting is on contact is axle 4 even, and the one end fixed mounting of slide-bar 7 is on connecting plate 6, arc strip hole is passed to the one end of slide-bar 7, through the linkage of connecting plate 6 and slide-bar 7, can avoid operating personnel direct contact even axle, guarantees personnel's safety, the inner wall sliding contact of slide-bar 7 and bar through-hole.

The utility model discloses a theory of operation: the utility model discloses a set up spacing urceolus 10 on circuit breaker built-in board 1 to with contact connecting shaft 4 cooperation install in spacing urceolus 10, finally join in marriage with spacing urceolus 10 through spacing card axle 9 on contact connecting shaft 4 and finally play the limiting displacement to contact connecting shaft 4 when closing the floodgate position, can prevent effectively that the moving contact 5 of the initial stage of stop, static contact is because the contact pressure is unstable to be caused to retract;

specifically, the method comprises the following steps: it should be noted that, the device is a holding device for the moving contact 5 of the vacuum circuit breaker, and belongs to the technologies known by those skilled in the art for the related technologies of the vacuum circuit breaker itself, so that the details are not described herein;

in the initial stage from the start of the closing action of the moving contact and the static contact to the completion of the action, the limiting clamp shaft 9 on the contact connecting shaft 4 is slidably mounted in the corresponding concave chute 11, the limiting clamp shaft 9 is in a reset state, and the limiting clamp shaft 9 does not influence the moving contact 5 to approach the static contact to perform the closing action in the reset state; when the moving contact and the static contact are contacted, the initial stage of closing is completed, the limiting clamping shaft 9 slides out of the limiting outer barrel 10 at the moment, an operator can slide the sliding shaft 7 from one end of the arc-shaped through hole 8 to the other end according to the prompt of closing display of the circuit breaker, the sliding shaft 7 drives the contact 5 to be connected with the shaft 4 to rotate for 90 degrees through the connecting plate 6 in the process, and then the limiting clamping shaft 9 is far away from the port of the concave sliding groove 11, at the moment, the limiting clamping shaft 9 is contacted with the outer port of the limiting outer barrel 10, the contact connecting shaft 4 and the moving contact 5 are dropped and clamped at the closing position, and due to the limitation of the limiting clamping shaft 9, the contact stability of the moving contact and the static contact at the initial stage of closing is guaranteed, and the use safety of the over-current electric equipment is further guaranteed.

In addition, it should be noted that after the purpose of limiting the moving contact 5 is achieved by adjusting the sliding shaft 7, that is, after the sliding shaft 7 is located at the limiting position for 2 to 4 seconds, the contact force between the moving contact 5 and the static contact reaches a preset value and tends to be stable, in order to ensure the normal function of the vacuum circuit breaker, the sliding shaft 7 needs to slide in the strip-shaped through hole to the initial position, so that the limiting clamp shaft 9 and the contact connecting shaft 4 are reset, the limiting clamp shaft 9 returns to the port corresponding to the concave chute 11, and the moving contact 5 can perform a switching-off action without being influenced by the limitation of the limiting clamp shaft 9. The distance between the internal plate 1 and the external plate 2 is 27-32 mm, which is beneficial to ensuring the stability of the operating mechanism.

While embodiments of the invention have been disclosed above, it is not intended to be limited to the applications listed in the specification and the examples. It can be applicable to various and be fit for the utility model discloses a field completely. Additional modifications will readily occur to those skilled in the art. The invention is therefore not to be limited to the specific details and illustrations shown and described herein, without departing from the general concept defined by the claims and their equivalents.

Claims

1. A contact holding device of a high reliability vacuum circuit breaker, comprising: the external board and the internal board are arranged in parallel and connected through a plurality of fixing columns, and arc-shaped through holes are formed in the external board;

the connecting plate is arranged between the built-in plate and the external plate, the connecting plate is fixedly mounted on the contact connecting shaft, one end of the sliding shaft is fixedly mounted on the connecting plate, one end of the sliding shaft penetrates through the arc-shaped strip hole, and the sliding shaft is in sliding contact with the inner wall of the strip-shaped through hole.

2. The contact holding device of a high reliability vacuum circuit breaker according to claim 1, wherein the length of the stopper shaft is 8-13 mm.

3. The contact holding device of a high reliability vacuum circuit breaker according to claim 2, wherein the distance between the inner plate and the outer plate is 27-32 mm.

4. The contact holding device of a high reliability vacuum circuit breaker according to claim 3, wherein an insulating rubber pad is fixedly installed at one end of the slide shaft away from the external plate.