A double contact circuit breaker

Abstract

A kind of double-contact circuit breaker.The utility model provides a double-contact circuit breaker, mainly solves the problem of high temperature rise of current adoption series double-contact circuit breaker.Its characterized in that: the static contact includes first static contact point (21) and second static contact point (22) in parallel on circuit;The moving contact includes first moving contact (51) and second moving contact (52) in parallel on circuit, first moving contact is oppositely arranged with the first static contact point, second moving contact is oppositely arranged with the second static contact point;Partition (6) is arranged between two the arc-extinguishing chambers, part the partition is arranged in the arc running channel and is divided into two chambers.This utility model provides a double-contact circuit breaker, adopts parallel double-contact structure, and the temperature rise is lower.

Description

Technical Field

[0001] This utility model relates to the field of circuit breakers, specifically to a double-contact circuit breaker. Background Technology

[0002] Chinese patent CN 101656179A discloses a series-connected double-contact circuit breaker. The series-connected double-contact circuit breaker has a high resistance, which leads to a high temperature rise and a high temperature inside the circuit breaker housing. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, this utility model provides a double-contact circuit breaker, which mainly solves the problem of high temperature rise in the currently used series-type double-contact circuit breakers.

[0004] The technical solution of this utility model is as follows:

[0005] A double-contact circuit breaker includes a housing, within which are a stationary contact, two arc-extinguishing chambers, and a rotatably mounted bracket. A moving contact is mounted on the bracket, and an arc-running channel is formed between the moving contact and the arc-extinguishing chambers. The stationary contact includes a first stationary contact and a second stationary contact connected in parallel in the circuit.

[0006] The moving contact includes a first moving contact and a second moving contact connected in parallel in the circuit. The first moving contact is disposed opposite to the first stationary contact, and the second moving contact is disposed opposite to the second stationary contact.

[0007] A partition is provided between the two arc-extinguishing chambers, and part of the partition is provided in the arc-running channel to divide it into upper and lower chambers.

[0008] It also includes an arc-starting plate, which includes a first sub-plate and a second sub-plate. The first sub-plate and the second sub-plate are disposed on both sides of the partition. The first sub-plate is disposed below one of the arc-extinguishing chambers, and the second sub-plate is disposed below the other arc-extinguishing chamber.

[0009] The housing is provided with a riveting post, and the partition is provided with mounting holes corresponding to the riveting post.

[0010] A groove is provided between the first moving contact and the second moving contact.

[0011] The stationary contact includes a first arc-shaped plate and a second arc-shaped plate, which are disposed on both sides of the partition.

[0012] The tail end of the first arc-shaped plate faces the arc-extinguishing chamber.

[0013] The partition is provided with a support block, which is in contact with the inner wall of the first arc-shaped plate.

[0014] The beneficial effects of this utility model are: This utility model provides a double-contact circuit breaker, which adopts a parallel double-contact structure and has a lower temperature rise. Attached Figure Description

[0015] Figure 1 This is a perspective view of one embodiment of the present invention.

[0016] Figure 2 This is a cross-sectional schematic diagram of one embodiment of the present invention.

[0017] Figure 3 This is a three-dimensional schematic diagram of the moving contact of one embodiment of the present invention.

[0018] Figure 4 This is a partial perspective view of one embodiment of the present invention.

[0019] Figure 5 This is a schematic diagram of one embodiment of the present invention.

[0020] Figure 6 This is an exploded view of one embodiment of the present invention.

[0021] Figure 7 This is an exploded view of one embodiment of the present invention. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings. A dual-contact circuit breaker includes a housing 1, within which are disposed a stationary contact 2, two arc-extinguishing chambers 3, and a rotatably mounted bracket. A moving contact 5 is mounted on the bracket, and an arc-running channel 10 is formed between the moving contact and the arc-extinguishing chambers. The stationary contact includes a first stationary contact 21 and a second stationary contact 22 connected in parallel in the circuit. The moving contact includes a first moving contact 51 and a second moving contact 52 connected in parallel in the circuit. The first moving contact is disposed opposite to the first stationary contact, and the second moving contact is disposed opposite to the second stationary contact. A partition 6 is disposed between the two arc-extinguishing chambers, and part of the partition is disposed within the arc-running channel, dividing it into upper and lower chambers 101. The bracket used to mount the moving contact is existing technology and will not be elaborated further. Directing the two arcs into the two arc-extinguishing chambers facilitates arc extinguishing. The bracket drives the moving contact to open and close, achieving high synchronization. The wiring configuration is: left terminal - trip unit - stationary contact - moving contact - right terminal, where the stationary and moving contacts are two sets of switches connected in parallel. The partition not only isolates the two arc-extinguishing chambers but also divides the arc-running channel into two chambers, allowing the arc to enter each chamber separately.

[0023] In this embodiment, as shown in the figure, an arc-initiating plate 7 is also included, which comprises a first dividing plate 71 and a second dividing plate 72. The first dividing plate and the second dividing plate are disposed on both sides of the partition plate. The first dividing plate is disposed below one of the arc-extinguishing chambers, and the second dividing plate is disposed below the other arc-extinguishing chamber. This serves to guide the electric arc into the arc-extinguishing chamber.

[0024] In this embodiment, as shown in the figure, a riveting post 11 is provided inside the housing, and a mounting hole 61 corresponding to the riveting post is provided on the partition plate. The riveting post has a second mounting hole that mates with the mounting hole for riveting. This riveting post is used to install the upper and lower covers; this technology already exists, but this feature is utilized. Of course, a dedicated riveting post could also be provided independently.

[0025] In this embodiment, as shown in the figure, a groove 53 is provided between the first moving contact and the second moving contact.

[0026] In this embodiment, as shown in the figure, the stationary contact includes a first arc-shaped plate 23 and a second arc-shaped plate 24, which are disposed on both sides of the partition. The structure is simple and can be adapted to two types of arc-extinguishing chambers.

[0027] In this embodiment, as shown in the figure, the tail end of the first arc-shaped plate faces the arc-extinguishing chamber. This facilitates the entry of the electric arc into the arc-extinguishing chamber. The second arc-shaped plate has the same structure as the first arc-shaped plate.

[0028] In this embodiment, as shown in the figure, a support block 66 is provided on the partition plate, and the support block contacts the inner wall of the first arc-shaped plate. This provides better support for the first arc-shaped plate.

[0029] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. The embodiments should not be considered as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A double-contact circuit breaker, comprising a housing (1), wherein a stationary contact (2), two arc-extinguishing chambers (3), and a rotatably mounted bracket are provided inside the housing, and a moving contact (5) is mounted on the bracket, wherein an arc-running channel (10) is formed between the moving contact and the arc-extinguishing chamber, characterized in that: The stationary contact includes a first stationary contact (21) and a second stationary contact (22) connected in parallel on the circuit. The moving contact includes a first moving contact (51) and a second moving contact (52) connected in parallel in the circuit. The first moving contact is disposed opposite to the first stationary contact, and the second moving contact is disposed opposite to the second stationary contact. A partition (6) is provided between the two arc-extinguishing chambers, and part of the partition is provided in the arc-running channel to divide it into upper and lower chambers.

2. A double-contact circuit breaker according to claim 1, characterized in that: It also includes an arc-starting plate (7), which includes a first sub-plate (71) and a second sub-plate (72). The first sub-plate and the second sub-plate are located on both sides of the partition. The first sub-plate is located below one of the arc-extinguishing chambers, and the second sub-plate is located below the other arc-extinguishing chamber.

3. A double-contact circuit breaker according to claim 1, characterized in that: The housing is provided with a riveting post (11), and the partition is provided with mounting holes (61) corresponding to the riveting post.

4. A double-contact circuit breaker according to claim 1, characterized in that: A groove (53) is provided between the first moving contact and the second moving contact.

5. A double-contact circuit breaker according to any one of claims 1-4, characterized in that: The stationary contact includes a first arc plate (23) and a second arc plate (24), which are located on both sides of the partition.

6. A double-contact circuit breaker according to claim 5, characterized in that: The tail end of the first arc-shaped plate faces the arc-extinguishing chamber.

7. A double-contact circuit breaker according to claim 5, characterized in that: The partition is provided with a support block (66), which is in contact with the inner wall of the first arc-shaped plate.

Images