CN220914129U

CN220914129U - Circuit breaker

Info

Publication number: CN220914129U
Application number: CN202322839160.2U
Authority: CN
Inventors: 杨晓智; 李正锋
Original assignee: Yueqing Bafeng Electrical Co ltd
Current assignee: Yueqing Bafeng Electrical Co ltd
Priority date: 2023-10-23
Filing date: 2023-10-23
Publication date: 2024-05-07
Anticipated expiration: 2033-10-23

Abstract

The utility model discloses a circuit breaker, which relates to the field of circuit breakers and comprises an upper cover body, a lower shell body, an operating mechanism and a plurality of contact systems, wherein the operating mechanism is connected with the contact systems in a linkage way, a middle cover for covering the contact systems is arranged between the upper cover body and the lower shell body, and the middle cover is provided with a partition plate for dividing a space into a plurality of areas and an arc-preventing baffle plate. The utility model has the advantages of good safety and good practicability.

Description

Circuit breaker

Technical Field

The utility model relates to the field of circuit breakers, in particular to a circuit breaker.

Background

The circuit breaker in the prior art comprises a molded case circuit breaker, an intelligent circuit breaker of the Internet of things and the like, and the molded case circuit breaker adopting a modularized rotating shaft is disclosed in 2020-04-28 in publication No. CN210429720U, and all contact systems are not isolated, so that all structural parts and control circuits are easy to burn or break down by arcs generated by contacts, and the defect of poor practicality exists.

Disclosure of utility model

In order to overcome the defects of the background technology, the utility model provides the circuit breaker with good safety and good practicability.

The utility model adopts the technical scheme that: the circuit breaker comprises an upper cover body, a lower shell, an operating mechanism and a plurality of contact systems, wherein the operating mechanism is connected with the contact systems in a linkage manner, a middle cover for covering the contact systems is arranged between the upper cover body and the lower shell, and the middle cover is provided with a baffle plate for dividing a space into a plurality of areas and an arc-preventing baffle plate.

The contact system comprises a contact assembly, a moving contact and a connecting plate assembly connected with the moving contact, wherein the operating mechanism is provided with a rotating shaft connected with the moving contact in a linkage mode, the connecting plate assembly is fixedly installed in the lower shell, one end of the moving contact is fixedly connected with the connecting plate assembly, and the other end of the moving contact extends into the contact assembly.

The connecting plate assembly is formed by laminating, extruding and hard-connecting a plurality of copper plates, bending and forming all the copper plates to obtain a plurality of rows of first connecting parts which are vertically arranged side by side, and two adjacent first connecting parts are matched to clamp the moving contact.

The number of the first connecting parts is three, and the number of the moving contacts is two.

And the connecting plate assembly and the moving contact are respectively made of red copper.

The beneficial effects of the utility model are as follows: the structural accessories are firstly installed in the middle cover to be assembled into an assembly, so that the assembly is more convenient; in addition, the contact system is isolated from the control circuit, so that the structural component and the control circuit are protected from being burnt out and broken down by electric arcs generated by the contacts.

Drawings

Fig. 1 is a schematic structural diagram of a circuit breaker according to an embodiment of the present utility model.

Fig. 2 is a schematic diagram of a disconnection structure of the circuit breaker.

Fig. 3 is a schematic structural view of the middle cap.

Fig. 4 is a schematic structural view of the connection plate assembly and the moving contact.

Detailed Description

Embodiments of the utility model are further described below with reference to the accompanying drawings:

As shown in the figure, the circuit breaker comprises an upper cover body 1, a lower shell body 2, an operating mechanism 3 and a plurality of contact systems, wherein the operating mechanism 3 is connected with the contact systems in a linkage way, a middle cover 4 for covering the contact systems is arranged between the upper cover body 1 and the lower shell body 2, and the middle cover 4 is provided with a partition plate 5 for dividing a space into a plurality of areas and a baffle plate 6 for preventing electric arcs; the structural accessories are firstly installed in the middle cover to be assembled into an assembly, so that the assembly is more convenient; in addition, the contact system is isolated from the control circuit, so that the structural component and the control circuit are protected from being burnt out and broken down by electric arcs generated by the contacts.

A shield as in fig. 2, which is disposed in front of the moving contact and connecting plate assembly, isolates the arc.

The circuit breaker in this technical scheme includes Moulded Case Circuit Breaker (MCCB), intelligent circuit breaker and thing networking intelligent circuit breaker.

The contact system comprises a contact assembly 7, a moving contact 8 and a connecting plate assembly 10 connected with the moving contact 8, wherein the operating mechanism 3 is provided with a rotating shaft (not shown) connected with the moving contact 8 in a linkage mode, the connecting plate assembly 10 is fixedly installed in the lower shell 2, one end of the moving contact 8 is fixedly connected with the connecting plate assembly 10, the other end of the moving contact extends into the contact assembly 7, the operating mechanism drives a plurality of moving contacts to act through the rotating shaft, an electric arc is easy to generate when the moving contacts are contacted with a fixed contact in the contact assembly, and the moving contacts can be blocked and protected by a middle cover.

The connecting plate assembly 10 is formed by laminating, extruding and hard-connecting a plurality of copper plates, bending and forming all the copper plates to obtain a plurality of rows of first connecting parts 11 which are vertically arranged side by side, and two adjacent first connecting parts 11 are matched and clamp the moving contact 8; the number of the first connecting parts 11 is three, and the number of the moving contacts 8 is two; the connecting plate assembly 10 and the moving contact 8 are made of red copper respectively.

The spring extrusion hard connection scheme is adopted, so that the contact surface is smoother and the contact area is increased; the contact area is doubled compared with the traditional connection; the contact resistance is reduced, the temperature rise of the product is effectively reduced, the product performance is improved, in addition, the contact area can be increased by adopting double-acting contact, the contact resistance is reduced, the stability of the contact surface is improved, the temperature rise is reduced, and the product performance is improved.

In the description of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

The skilled person will know: while the utility model has been described in terms of the foregoing embodiments, the inventive concepts are not limited to the utility model, and any modifications that use the inventive concepts are intended to be within the scope of the appended claims.

Claims

1. The utility model provides a circuit breaker, includes upper cover body (1), lower casing (2), operating device (3) and a plurality of contact system, operating device (3) are connected its characterized in that with the contact system linkage: a middle cover (4) for covering the contact system is arranged between the upper cover body (1) and the lower shell body (2), and the middle cover (4) is provided with a baffle plate (5) for dividing the space into a plurality of areas and a baffle plate (6) for preventing electric arcs.

2. The circuit breaker according to claim 1, characterized in that: the contact system comprises a contact assembly (7), a moving contact (8) and a connecting plate assembly (10) connected with the moving contact (8), wherein the operating mechanism (3) is provided with a rotating shaft in linkage connection with the moving contact (8), the connecting plate assembly (10) is fixedly installed in the lower shell (2), one end of the moving contact (8) is fixedly connected with the connecting plate assembly (10), and the other end of the moving contact extends into the contact assembly (7).

3. The circuit breaker according to claim 2, characterized in that: the connecting plate assembly (10) is formed by laminating, extruding and hard-connecting a plurality of copper plates, all the copper plates are bent and molded to obtain a plurality of rows of first connecting parts (11) which are vertically arranged side by side, and two adjacent first connecting parts (11) are matched to clamp the moving contact (8).

4. A circuit breaker according to claim 3, characterized in that: the number of the first connecting parts (11) is three, and the number of the moving contacts (8) is two.

5. The circuit breaker according to claim 2, characterized in that: the connecting plate assembly (10) and the moving contact (8) are made of red copper respectively.