CN214588703U

CN214588703U - Effectual high disconnected miniature circuit breaker that divides of arc extinguishing

Info

Publication number: CN214588703U
Application number: CN202120453209.9U
Authority: CN
Inventors: 潘晓东
Original assignee: Zhejiang Dazhan Electrical Co ltd
Current assignee: Zhejiang Dazhan Electrical Co ltd
Priority date: 2021-03-02
Filing date: 2021-03-02
Publication date: 2021-11-02
Anticipated expiration: 2031-03-02

Abstract

The utility model discloses an effectual high disconnected miniature circuit breaker that divides of arc extinguishing, including the static contact, the explosion chamber, bimetallic strip and the actuating mechanism who has the moving contact, bimetallic strip one end is connected with the second arc striking piece of guide electric arc, the kink inboard of static contact is equipped with the first arc striking piece of introducing the explosion chamber with electric arc, be equipped with the increase layer of integral type on the explosion chamber. The utility model discloses an add and established first run-on piece, and increased the thickness of first run-on piece and second run-on piece in order to strengthen the run-on piece to the bearing capacity of electric arc, first run-on piece extends to explosion chamber upper portion, and the second run-on piece extends to the explosion chamber lower part and has strengthened the arc initiation ability of circuit breaker, through the number of piles that has increased explosion chamber metal grid piece, thereby makes the explosion chamber have more cross the passageway and carry out the arc extinguishing heat dissipation and reach the effect that makes the contact divide the branch fast.

Description

Effectual high disconnected miniature circuit breaker that divides of arc extinguishing

Technical Field

The utility model relates to a circuit breaker technical field, concretely relates to effectual high branch of arc extinguishing divides disconnected miniature circuit breaker.

Background

The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition within a prescribed time.

The performance of the circuit breaker can directly affect the safety of electrical equipment, and the breaking speed of the circuit breaker is usually the breaking speed which can most reflect the good performance of the circuit breaker. Generally, a single arc striking plate or multiple channels are mostly adopted in the market for arc striking, but when the arc temperature is high, the bearing capacity of the single arc striking plate is slightly insufficient, the breaking capacity of the circuit breaker is influenced, and an arc extinguishing chamber of the circuit breaker in the market is about 9 metal grid pieces, and only 10 arc extinguishing channels can be separated.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

In order to solve the problem, the utility model provides a high branch divides disconnected miniature circuit breaker that the striking is effectual, simple structure safety and arc extinguishing effect are good.

(II) technical scheme

The utility model discloses a small-size circuit breaker is disconnected to effectual high branch of arc extinguishing, including the static contact, the explosion chamber, bimetallic strip and the actuating mechanism who has the moving contact, bimetallic strip one end is connected with the second arc striking piece of guide electric arc, the kink inboard of static contact is equipped with the first arc striking piece of introducing the explosion chamber with electric arc, be equipped with the thickening layer of integral type on the explosion chamber.

In some embodiments, a thickening piece is arranged on the outer side of the second arc striking piece, the other end of the second arc striking piece extends to the lower part of the arc extinguishing chamber, and the thickening piece is attached to the second arc striking piece.

In some embodiments, a section of the first arc striking plate extends to the upper part of the arc extinguishing chamber, and the outer side of the bent part of the first arc striking plate is attached to the inner side of the bent part of the fixed contact, so that the arc striking capacity of the circuit breaker is increased.

In some embodiments, equidistant metal grid pieces are arranged on the arc extinguish chamber, and equidistant metal grid pieces are also arranged on the thickening layer. The arc is divided more by adding the metal grid pieces, and more energy is divided, so that the arc extinguishing effect is enhanced.

(III) advantageous effects

Compared with the prior art, the utility model, it has following beneficial effect: establish first striking piece through adding, and increased the thickness of first striking piece and second striking piece in order to strengthen the striking piece to the bearing capacity of electric arc, first striking piece extends to explosion chamber upper portion, and the second striking piece extends to the explosion chamber lower part and has strengthened the striking ability of circuit breaker, through the number of piles that has increased explosion chamber metal grid piece, thereby makes the explosion chamber have more cross the passageway and carry out the arc extinguishing heat dissipation and reach the effect that makes the contact divide absolutely fast.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a partial structure of a high breaking miniature circuit breaker with a good arc extinguishing effect.

Fig. 2 is an enlarged schematic view of a local structure a of a high breaking miniature circuit breaker with a good arc extinguishing effect.

1. The driving mechanism comprises a driving mechanism 2, a bimetallic strip 3, an arc extinguish chamber 31, a metal grid plate 4, a moving contact 5, a first arc striking plate 6, a fixed contact 7, a second arc striking plate 8 and a thickening plate

Detailed Description

As with the common circuit breaker on the market, the utility model discloses a circuit breaker also connects bimetallic strip 2 through the terminal connection, is connected bimetallic strip 2 and moving contact 4 by the flexible coupling again. The static contact 6 is connected with an electromagnetic coil, the electromagnetic coil is connected with a terminal, and a handle drives the driving mechanism 1 through a connecting rod to close the circuit breaker.

As shown in fig. 1, it is a high breaking miniature circuit breaker with good arc extinguishing effect according to a preferred embodiment of the present invention, and the miniature circuit breaker of this embodiment includes an arc extinguishing chamber 3, a bimetal 2, a driving mechanism 1, a moving contact 4 and a static contact 6.

In this embodiment, as shown in fig. 1 and 2, the arc extinguishing chamber 3 is provided with an integrated thickening layer, and the thickening layer is provided with metal grid plates 31 which are equidistant from the metal grid plates 31 of other arc extinguishing chambers. The inner side of the bending part of the static contact 6 is provided with a first arc striking plate 5 for guiding electric arc, the outer side of the bending part of the first arc striking plate 5 is attached to the inner side of the bending part of the static contact 6, and the other end of the first arc striking plate extends into the arc extinguish chamber 3.

Further, the left side of the bimetallic strip 2 is welded with a second arc striking piece 7, the other end of the second arc striking piece 7 extends to the bottom of the arc extinguish chamber 3, a thickening piece 8 is arranged on the outer side of a bending part of the second arc striking piece 7, which is close to one side of the arc extinguish chamber 3, and the thickening piece 8 is attached to the second arc striking piece 7 so that the arc striking piece has stronger electric arc bearing capacity, and the arc striking capacity and the capacity of short-circuit breaking current are improved.

Furthermore, the moving contact 4 is arranged at the lower part of the driving mechanism 1, when a short circuit occurs or overvoltage passes through the circuit, the generated electric arc can enter the arc extinguish chamber from top to bottom through the first arc ignition sheet 5 and the second arc ignition sheet 7, and the electric arc is sucked into the arc extinguish chamber to extinguish the arc through the electromagnetic field generated by the electric arc on the grid sheet, so that the contact is quickly disconnected.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and are not intended to limit the spirit and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by the technical solution of the present invention by those skilled in the art should fall into the protection scope of the present invention, and the technical contents claimed by the present invention have been fully recorded in the claims.

Claims

1. The utility model provides an effectual high disconnected miniature circuit breaker of arc extinguishing, includes static contact (6), explosion chamber (3), bimetallic strip (2) and actuating mechanism (1) that have moving contact (4), its characterized in that: bimetallic strip (2) one end is connected with second arc piece (7) of guide electric arc, the kink inboard of static contact (6) is equipped with first arc piece (5) of introducing the explosion chamber with electric arc, be equipped with the thickening layer of integral type on explosion chamber (3).

2. A high breaking small-sized circuit breaker with good arc extinguishing effect according to claim 1, characterized in that: the outer side of the second arc striking piece (7) is provided with a thickening piece (8), the other end of the second arc striking piece (7) extends to the lower part of the arc extinguishing chamber (3), and the thickening piece (8) is attached to the second arc striking piece (7).

3. A high breaking small-sized circuit breaker with good arc extinguishing effect according to claim 1, characterized in that: one end of the first arc striking piece (5) extends to the upper part of the arc extinguishing chamber (3), and the outer side of the bending part of the first arc striking piece (5) is connected to the inner side of the bending part of the static contact (6).

4. A high breaking small-sized circuit breaker with good arc extinguishing effect according to claim 1, characterized in that: be equipped with equidistant metal grid piece (31) on explosion chamber (3), also be equipped with equidistant metal grid piece (31) on the thickening layer.