Arc striking sheet structure of circuit breaker

Abstract

Provided is an arc striking sheet structure of a circuit breaker. The circuit breaker mainly solves the problem that an arc extinguish chamber of an existing circuit breaker is likely to disengage by means of tail end limiting. The device is characterized by comprising a first limiting plate (12) which is arranged on the inner wall of the shell, correspondingly arranged above the plane sheet at the middle end and correspondingly arranged below the grid sheet. According to the arc striking sheet structure of the circuit breaker, the limiting plate is arranged in the middle section, so that the stability of the arc striking plate can be stably ensured, and the arc striking plate is prevented from falling off.

Description

Technical Field

[0001] This utility model relates to the field of circuit breakers, specifically to the arc-starting plate structure of circuit breakers. Background Technology

[0002] As shown in the Chinese patent with authorization announcement number CN109087829 B, the arc-starting plates of conventional circuit breakers are mostly limited only by the tail end through the limiting plate. However, in actual use, the arc-starting plate will deform. In addition, when breaking, after the arc reaches the arc-extinguishing chamber along the arc-starting plate, there will be a large attraction between the grid plate and the arc-starting plate, which may cause the arc-starting plate to fall out of the fixing groove and stick to the arc-extinguishing chamber, thus affecting the breaking capacity of the product. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, this utility model provides an arc-starting plate structure for circuit breakers, which mainly solves the problem that the arc-extinguishing chamber of current circuit breakers may come out due to the tail end limiting mechanism.

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

[0005] The arc-starting plate structure of the circuit breaker includes a housing, within which an arc-extinguishing chamber and an arc-starting plate are disposed. The arc-starting plate includes an arc-shaped plate and a planar plate, and the arc-extinguishing chamber includes a grid plate. It also includes...

[0006] The first limiting plate is disposed on the inner wall of the housing, corresponding to the upper part of the planar piece at the middle end and corresponding to the lower part of the grid piece.

[0007] It also includes a second limiting plate, which is disposed on the inner wall of the housing and is correspondingly disposed above the flat piece at the tail end.

[0008] It also includes a third limiting plate, which is disposed on the inner wall of the housing, corresponding to the upper part of the front flat piece and corresponding to the lower part of the grid piece.

[0009] The arc-extinguishing chamber includes a side plate, and the bottom of the side plate is provided with a receiving groove, and the first limiting plate is disposed in the receiving groove.

[0010] The flat plate at the tail end is provided with a notch, and the housing is provided with an exhaust hole, forming an air outlet channel between the exhaust hole and the notch.

[0011] The housing includes a base plate, and the bottom of the flat piece is disposed on the base plate.

[0012] It also includes a support plate, one end of which is connected to the first limiting plate and the other end of which is connected to the base plate.

[0013] The flat plate is provided with a positioning part, and the bottom plate is provided with a baffle. The baffle is correspondingly provided in front of the positioning part, and the support plate is correspondingly provided behind the positioning part.

[0014] The beneficial effects of this utility model are: This utility model provides an arc-starting plate structure for a circuit breaker, and placing the limiting plate in the middle section can stably ensure the stability of the arc-starting plate and prevent it from coming off. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of one embodiment of the present invention.

[0016] Figure 2 This is a three-dimensional schematic diagram of an arc-drawing plate according to an embodiment of the present invention.

[0017] Figure 3 This is a partial perspective view of one embodiment of the present invention.

[0018] Figure 4 This is a three-dimensional schematic diagram of the arc-extinguishing chamber according to an embodiment of the present invention. Detailed Implementation

[0019] The arc-starting plate structure of the circuit breaker is further described below with reference to the accompanying drawings. It includes a housing 1, within which an arc-extinguishing chamber 2 and an arc-starting plate 3 are provided. The arc-starting plate includes an arc-shaped piece 31 and a flat piece 32. The arc-extinguishing chamber includes a grid piece 21. It also includes a first limiting plate 12, disposed on the inner wall of the housing, correspondingly positioned above the flat piece at the middle and below the grid piece. Here, the grid piece can be the lowest grid piece. This application positions the first limiting plate in the middle section to better prevent dislodgement, ensure the stability of the arc-starting plate, and increase its service life.

[0020] In this embodiment, as shown in the figure, a second limiting plate 11 is also included, which is disposed on the inner wall of the housing and correspondingly disposed above the flat piece at the tail end. Multiple limiting plates are provided to limit the arc-initiating piece from multiple positions to prevent it from detaching. These limiting plates can be sheet-like or strip-like, and can be disposed on one or both sides of the housing according to actual needs.

[0021] In this embodiment, as shown in the figure, a third limiting plate 13 is also included, which is disposed on the inner wall of the housing, correspondingly disposed above the front planar piece and correspondingly disposed below the grid piece. To further enhance the limiting effect, a third limiting plate is also provided on the front side of the planar piece, thereby realizing a front, middle and rear three-section limiting structure.

[0022] In this embodiment, as shown in the figure, the arc-extinguishing chamber includes a side plate 22, and a receiving groove 221 is provided at the bottom of the side plate. The first limiting plate is disposed in the receiving groove. This provides space for the second limiting plate and also limits the arc-extinguishing chamber in the front-back direction.

[0023] In this embodiment, as shown in the figure, the flat plate at the tail end is provided with a notch 321, and the housing is provided with an exhaust hole 14. An exhaust channel 15 is formed between the exhaust hole and the notch. Some gas can be discharged through the exhaust channel (see reference). Figure 3 (As indicated by the middle arrow), the conventional structure is a complete plate with the front end in contact with the baffle. The notch and slot in this application create a larger gap between the notch and the baffle, allowing airflow to escape.

[0024] In this embodiment, as shown in the figure, the housing includes a base plate 16, and the bottom of the flat piece is disposed on the base plate.

[0025] In this embodiment, as shown in the figure, a support plate 121 is also included. One end of the support plate is connected to the first limiting plate, and the other end is connected to the base plate. The overall structure is more stable.

[0026] In this embodiment, as shown in the figure, the planar piece is provided with a positioning part 322, and the base plate is provided with a baffle 161. The baffle is correspondingly located in front of the positioning part, and the support plate is correspondingly located behind the positioning part. After installation, the arc-inducing piece can also be limited in the front-back direction, making the overall structure more stable. This positioning part can be a protruding part provided on the side wall of the planar piece.

[0027] 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.

[0028] 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.

[0029] 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. An arc-starting plate structure for a circuit breaker, comprising a housing (1), wherein an arc-extinguishing chamber (2) and an arc-starting plate (3) are provided within the housing, the arc-starting plate comprising an arc-shaped plate (31) and a flat plate (32), and the arc-extinguishing chamber comprising a grid plate (21); characterized in that: Also includes The first limiting plate (12) is disposed on the inner wall of the housing, corresponding to the upper part of the flat plate at the middle end, and corresponding to the lower part of the grid plate.

2. The arc-striking plate structure of the circuit breaker according to claim 1, characterized in that: It also includes a second limiting plate (11), which is disposed on the inner wall of the housing and is disposed above the flat piece at the tail end.

3. The arc-striking plate structure of the circuit breaker according to claim 1 or 2, characterized in that: It also includes a third limiting plate (13), which is disposed on the inner wall of the housing, corresponding to the upper part of the front flat piece and corresponding to the lower part of the grid piece.

4. The arc-striking plate structure of the circuit breaker according to claim 1, characterized in that: The arc-extinguishing chamber includes a side plate (22), and the bottom of the side plate is provided with a receiving groove (221), and the first limiting plate is provided in the receiving groove.

5. The arc-starting plate structure of the circuit breaker according to claim 1, characterized in that: The flat plate at the tail end is provided with a notch (321), and the housing is provided with an exhaust hole (14). An exhaust channel (15) is formed between the exhaust hole and the notch.

6. The arc-starting plate structure of the circuit breaker according to claim 1, 4, or 5, characterized in that: The housing includes a base plate (16), and the bottom of the flat piece is disposed on the base plate.

7. The arc-starting plate structure of the circuit breaker according to claim 6, characterized in that: It also includes a support plate (121), one end of which is connected to the first limiting plate and the other end of which is connected to the base plate.

8. The arc-starting plate structure of the circuit breaker according to claim 7, characterized in that: The flat plate is provided with a positioning part (322), and the bottom plate is provided with a baffle (161). The baffle is located in front of the positioning part, and the support plate is located behind the positioning part.

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