Double-channel circuit breaker

Abstract

The utility model provides a double-channel circuit breaker, which relates to the technical field of circuit breakers, and comprises a shell, an arc isolating wall, a magnetism increasing sheet and an arc extinguishing chamber, the arc isolating wall is provided with an arc resisting bulge, the arc resisting bulge is provided with a bend, the opening direction of the arc resisting bulge is opposite to the movement direction of an arc entering the arc extinguishing chamber through an arc running channel, and the arc isolating wall is provided with a through hole I; the first through hole is located at the opening position of the arc blocking protrusion, a second through hole corresponding to the first through hole is formed in the magnetism increasing sheet, and part of electric arc blocked by the arc blocking protrusion can enter the arc extinguish chamber through the first through hole, the second through hole and a flow channel in the shell. According to the multi-flow-channel structure with the arc stopping protrusions, the arc running channels and the shunting flow channels, multi-flow-channel arc striking can accelerate arc cooling and reduce arc energy, the arc entering the position of the shell cannot return to the arc running channels due to different arc channels, the arc cannot cause the back breakdown phenomenon of the arc, and therefore the breaking capacity of a product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a double-flow path circuit breaker. Background Art

[0002] The existing circuit breaker has only one arc running channel. When a large number of arcs and high-energy arcs pass through, arc backflow and arc back breakdown are likely to occur. The breaking capacity of the product is difficult to further improve. In view of the above defects, this application is proposed. Utility Model Content

[0003] The utility model aims to provide a double-flow channel circuit breaker, which solves the problem that the traditional single arc-running channel is prone to arc back breakdown, which has an adverse effect on the product breaking capacity.

[0004] In order to solve the above problems, the utility model provides a dual-flow channel circuit breaker, including a shell, an arc isolation wall, a magnetizing sheet and an arc extinguishing chamber, the arc isolation wall is provided with an arc blocking protrusion, the arc blocking protrusion has a bend, and its opening direction is arranged opposite to the movement direction of the arc entering the arc extinguishing chamber through the arc running channel, the arc isolation wall is provided with a through hole 1, the through hole 1 is located at the opening position of the arc blocking protrusion, the magnetizing sheet is provided with a through hole 2 corresponding to the through hole 1, and the part of the arc blocked by the arc blocking protrusion can enter the arc extinguishing chamber through the through hole 1, the through hole 2 and the flow channel on the shell.

[0005] According to an embodiment of the present invention, the arc-blocking protrusion is an arrow-shaped structure.

[0006] According to an embodiment of the present invention, the first through hole and the second through hole are diamond-shaped holes.

[0007] According to an embodiment of the utility model, the diamond-shaped hole is configured to match the shape of the arc-blocking protrusion.

[0008] According to an embodiment of the present invention, the arc-blocking protrusion is an arc-shaped structure.

[0009] According to an embodiment of the present invention, the arc-blocking protrusions are arranged in a plurality of groups.

[0010] According to an embodiment of the utility model, a plurality of groups of arc-blocking protrusions are dispersedly arranged along the extension direction of the arc running channel.

[0011] According to an embodiment of the utility model, the structures of the two groups of front and rear arc isolation walls and the magnetizing sheets are the same.

[0012] According to an embodiment of the present invention, the height of the arc-blocking protrusion is less than one quarter of the distance between the front and rear arc-isolating walls.

[0013] The beneficial effect of the utility model is that by arranging arc-blocking protrusions, a multi-channel structure of arc running channels and diversion channels is formed. Multi-channel arc initiation can accelerate the cooling of the arc, reduce the arc energy, and improve the product's breaking capacity. The arc entering the outer shell position will not return to the arc running channel due to the different arc paths. This arc will not cause arc back breakdown, thereby improving the product's breaking capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a schematic diagram of the overall structure of a double-flow circuit breaker;

[0016] Figure 2 It is a schematic diagram of the internal structure of a double-flow circuit breaker;

[0017] Figure 3 It is a schematic diagram of the explosion structure of a double-flow circuit breaker;

[0018] Figure 4 This is a schematic diagram of the arc entering the arc striking chamber along the shell. DETAILED DESCRIPTION

[0019] The following description is only used to disclose the utility model so that those skilled in the art can implement the utility model. The embodiments described below are only for example, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other solutions that do not deviate from the spirit and scope of the utility model.

[0020] A double-flow circuit breaker, such as Figure 1-Figure 4 , including a shell 14, an arc isolation wall 11, a magnetizing sheet 16 and an arc extinguishing chamber 15, and also including traditional circuit breaker structures such as an operating mechanism, a contact structure, a wiring structure, and a tripping structure. The above structure is consistent with the traditional circuit breaker and will not be repeated. The magnetizing sheet 16 is arranged between the arc isolation wall 11 and the shell 14, and an arc running channel 18 is formed between the front and rear arc isolation walls 11. The arc running channel 18 is connected to the arc extinguishing chamber 15, and an arc extinguishing grid is arranged in the arc extinguishing chamber 15.

[0021] like Figure 2, an arc-blocking protrusion 12 is provided on the arc-isolating wall 11, and the arc-blocking protrusion 12 has a bend, and its opening direction is opposite to the movement direction of the arc entering the arc extinguishing chamber 15 through the arc running channel. There are several groups of arc-blocking protrusions 12, and three groups are provided in this embodiment. The arc-blocking protrusions 12 are dispersedly arranged along the extension direction of the arc running channel 18 to improve the diversion effect. Since the arc running channel 18 is a curved channel, the opening directions of each group of arc-blocking protrusions 12 are different. In this embodiment, the arc-blocking protrusion 12 is an arrow-shaped structure. In other embodiments, an arc-shaped structure or the like can also be used. A through hole 13 is provided on the arc-isolating wall 11, and the through hole 13 is located at the opening position of the arc-blocking protrusion 12. A through hole 2 17 is provided on the magnetizing sheet 16 corresponding to the through hole 13. The through hole 13 and the through hole 2 17 are diamond-shaped holes. The through hole is arranged in a shape consistent with the arc-blocking protrusion 12 to facilitate the passage of the arc. The front and rear arc-isolating walls 11 and the magnetizing sheet 16 have the same structure.

[0022] The arc running channel 18 constitutes the main flow channel of the arc, and the through hole 13, the through hole 2 17 and the shell constitute the branch flow channel of the arc, thereby forming a double flow channel (also called a multi-flow channel). After part of the arc is blocked by the arc blocking protrusion 12, the flow direction of the arc is guided so that it passes through the through hole 13 and the through hole 2 17 and enters the inner wall position of the shell, such as Figure 4 The arc enters the arc extinguishing chamber 15 along the flow path at the shell, thereby realizing multi-flow path arc striking.

[0023] Multi-channel arc initiation can accelerate arc cooling, reduce arc energy, and improve product breaking capacity. The arc entering the shell position will not return to the arc running channel 18 due to different arc paths. This arc will not cause arc back breakdown, thereby improving the breaking capacity of the product.

[0024] Preferably, the height of the arc-blocking protrusion 12 is less than one-fourth of the distance between the front and rear arc-isolating walls 11 , that is, the total width of the arc-running channel 18 occupied by the front and rear arc-blocking protrusions 12 is less than half of the front and rear width of the arc-running channel 18 , thereby avoiding a significant impact on the main arc-starting effect of the arc-running channel 18 .

[0025] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments. Without departing from the principles, the embodiments of the present invention may be deformed and modified in any way.

Claims

1. A double-flow circuit breaker, characterized in that: The invention comprises a shell (14), an arc isolation wall (11), a magnetizing sheet (16) and an arc extinguishing chamber (15); the arc isolation wall (11) is provided with an arc blocking protrusion (12); the arc blocking protrusion (12) is bent, and its opening direction is arranged opposite to the movement direction of the arc entering the arc extinguishing chamber (15) through an arc running channel; the arc isolation wall (11) is provided with a through hole 1 (13); the through hole 1 (13) is located at the opening position of the arc blocking protrusion (12); the magnetizing sheet (16) is provided with a through hole 2 (17) corresponding to the through hole 1 (13); part of the arc blocked by the arc blocking protrusion (12) can enter the arc extinguishing chamber (15) through the through hole 1 (13), the through hole 2 (17) and the flow channel on the shell (14).

2. The dual-flow path circuit breaker according to claim 1, characterized in that: The arc-blocking protrusion (12) is an arrow-shaped structure.

3. The dual-flow path circuit breaker according to claim 2, characterized in that: The through hole one (13) and the through hole two (17) are diamond-shaped holes.

4. The dual-flow path circuit breaker according to claim 3, characterized in that: The rhombus-shaped hole is arranged to match the shape of the arc-blocking protrusion (12).

5. The dual-flow path circuit breaker according to claim 1, characterized in that: The arc-blocking protrusion (12) is an arc-shaped structure.

6. The dual-flow path circuit breaker according to any one of claims 1 to 4, characterized in that: The arc-blocking protrusions (12) are arranged in a plurality of groups.

7. The dual-flow path circuit breaker according to claim 6, characterized in that: A plurality of groups of arc-blocking protrusions (12) are dispersedly arranged along the extension direction of the arc-running channel (18).

8. The dual-flow path circuit breaker according to claim 7, characterized in that: The structures of the two groups of front and rear arc-isolating walls (11) and the magnetizing plates (16) are the same.

9. The dual-flow path circuit breaker according to claim 8, characterized in that: The arc-blocking protrusion (12) has a height that is less than one quarter of the distance between the front and rear arc-isolating walls (11).

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