An arc extinguishing chamber of a circuit breaker

Abstract

The utility model discloses an arc extinguishing chamber of a circuit breaker, which relates to the field of circuit breakers, and comprises a housing, an arc extinguishing assembly and a gas generating assembly, wherein the gas generating assembly is symmetrically mounted on the inner walls of both sides of the housing, a plurality of magnetizing sheets are arranged between the housing and the gas generating assembly, and the gas generating assemblies on both sides are relatively arranged to form a narrow slit for a moving contact to extend into, and the narrow slit is trumpet-shaped, and the opening size in the direction close to the arc extinguishing assembly is larger than the opening size in the direction close to the moving contact. The utility model has the advantages of controlling the gas flow direction and having good working stability.

Description

Technical Field

[0001] The utility model relates to the field of circuit breakers, in particular to an arc extinguishing chamber of a circuit breaker. Background Art

[0002] The arc extinguishing chamber in the prior art is a circuit breaker disclosed with publication number CN116053096A and publication date 2023.05.02; the arc extinguishing assembly disclosed therein includes a gas-producing material and a magnetizing material, but the gap between the gas-producing materials is too large, resulting in the defect of gas overflowing out of the shell. Utility Model Content

[0003] In order to overcome the shortcomings of the background technology, the utility model provides an arc extinguishing chamber of a circuit breaker which controls the gas flow direction and has good working stability.

[0004] The technical solution adopted by the utility model is: an arc extinguishing chamber of a circuit breaker, which includes a shell, an arc extinguishing assembly and a gas producing assembly, the gas producing assembly is symmetrically installed on the inner walls of both sides of the shell, a plurality of magnetizing sheets are arranged between the shell and the gas producing assembly, the gas producing assemblies on both sides relatively form a narrow gap for the moving contact to extend into, the narrow gap is trumpet-shaped and the opening size close to the arc extinguishing assembly is larger than the opening size close to the moving contact.

[0005] The gas production component comprises an insulating cover body and a gas production base which are matched with each other in a sleeve, and the insulating cover body and the gas production base cooperate to form a receiving cavity for accommodating the magnetizing sheet.

[0006] A plurality of transversely arranged positioning posts are arranged in the gas generating base, and a plurality of positioning grooves corresponding to the positioning posts are arranged on the side wall of the shell.

[0007] The insulating cover is provided with a plurality of hollow columns for avoiding the positioning columns, and the magnetizing sheet is provided with a plurality of mounting holes corresponding to the hollow columns.

[0008] The magnetizing sheet is made of iron sheet.

[0009] Fasteners for fixedly connecting the two side walls of the shell and the gas generating base are arranged between the two side walls.

[0010] The beneficial effects of the utility model are as follows: the technical solution increases the magnetic flux and the arc extinguishing speed by setting a magnetizing sheet between the shell and the gas producing component. In addition, the narrow gap is set into a trumpet shape to guide the gas and prevent the gas from overflowing outside the shell. It also has the advantages of increasing the gas pressure, controlling the gas flow direction and having good working stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the arc extinguishing chamber of the circuit breaker according to an embodiment of the utility model.

[0012] Figure 2 Schematic diagram of the split structure of the arc extinguishing chamber of the circuit breaker.

[0013] Figure 3 This is a schematic diagram of the split structure of the arc extinguishing chamber of the circuit breaker from another angle. DETAILED DESCRIPTION

[0014] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0015] As shown in the figure, an arc extinguishing chamber of a circuit breaker includes a shell 1, an arc extinguishing component 2 and a gas producing component, wherein the gas producing components are symmetrically mounted on the inner walls of both sides of the shell 1, and a plurality of magnetizing sheets 3 are arranged between the shell 1 and the gas producing components. The gas producing components on both sides relatively form a narrow slit 4 for the moving contact to extend into, and the narrow slit 4 is trumpet-shaped, and the opening size in the direction close to the arc extinguishing component 2 is larger than the opening size in the direction close to the moving contact. The technical solution increases the magnetic flux and the arc extinguishing speed by arranging the magnetizing sheets between the shell and the gas producing components, and furthermore, the narrow slit is arranged in a trumpet shape, which can guide the gas and prevent the gas from escaping out of the shell, and has the advantages of increasing the gas pressure, controlling the gas flow direction and having good working stability.

[0016] The gas production component includes an insulating cover 5 and a gas production base 6 that are fitted together. The insulating cover 5 and the gas production base 6 cooperate to form a accommodating cavity for placing the magnetizing sheet 3. The insulating cover and the gas production base wrap the magnetizing sheet 3 in all directions. The entire accommodating cavity has a good sealing effect and has the advantage of good insulation effect.

[0017] The gas-producing base 6 is provided with a plurality of transversely arranged positioning posts 7, the side wall of the shell 1 is provided with a plurality of positioning grooves 8 corresponding to the positioning posts 7, the insulating cover 5 is provided with a plurality of hollow posts 9 for avoiding the positioning posts 7, the magnetizing sheet 3 is provided with a plurality of mounting holes 10 corresponding to the hollow posts 9, and the magnetizing sheet 3 is made of iron sheet; fasteners 11 for fixing the two side walls of the shell 1 and the gas-producing base 6 are provided between the two side walls; the positioning posts are inserted into the positioning grooves after passing through the hollow posts, and then are connected by fasteners, and the mounting holes of the magnetizing sheet are mounted on the hollow posts to keep the magnetizing sheet stable.

[0018] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0019] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0020] Technical personnel should note: Although the utility model has been described according to the above specific implementation methods, the utility model concept is not limited to this utility model. Any modification using the utility model concept will be included in the scope of protection of this patent.

Claims

1. An arc extinguishing chamber of a circuit breaker, characterized in that: It comprises a housing (1), an arc extinguishing assembly (2) and a gas generating assembly, wherein the gas generating assembly is symmetrically mounted on the inner walls of both sides of the housing (1), a plurality of magnetizing sheets (3) are arranged between the housing (1) and the gas generating assembly, and the gas generating assemblies on both sides are opposed to each other to form a narrow slit (4) into which a moving contact can extend, the narrow slit (4) is trumpet-shaped, and the opening size in the direction close to the arc extinguishing assembly (2) is larger than the opening size in the direction close to the moving contact.

2. The arc extinguishing chamber of the circuit breaker according to claim 1, characterized in that: The gas generating assembly comprises a sleeve-matched insulating cover (5) and a gas generating base (6), wherein the insulating cover (5) and the gas generating base (6) cooperate to form a receiving cavity for accommodating the magnetizing sheet (3).

3. The arc extinguishing chamber of the circuit breaker according to claim 2, characterized in that: A plurality of transversely arranged positioning columns (7) are provided in the gas generating base (6), and a plurality of positioning grooves (8) corresponding to the positioning columns (7) are provided on the side wall of the shell (1).

4. The arc extinguishing chamber of the circuit breaker according to claim 3, characterized in that: The insulating cover (5) is provided with a plurality of hollow columns (9) that avoid the positioning columns (7), and the magnetizing sheet (3) is provided with a plurality of mounting holes (10) corresponding to the hollow columns (9).

5. The arc extinguishing chamber of the circuit breaker according to claim 1, characterized in that: The magnetizing sheet (3) is made of iron sheet.

6. The arc extinguishing chamber of the circuit breaker according to claim 1, characterized in that: Fasteners (11) for fixedly connecting the two side walls of the shell (1) and the gas-generating base (6) are provided between the two side walls.

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