An arc-extinguishing chamber installation structure for a circuit breaker

Abstract

This utility model discloses an arc-extinguishing chamber installation structure for a circuit breaker, relating to the field of circuit breakers. It includes a housing and an arc-extinguishing chamber, wherein the arc-extinguishing chamber comprises a first arc-extinguishing chamber and a second arc-extinguishing chamber with different external dimensions. The housing is provided with a cavity for accommodating the arc-extinguishing chambers and a positioning component for positioning the low-breaking-capacity arc-extinguishing chamber and the high-breaking-capacity arc-extinguishing chamber during selective installation. This utility model has the advantages of reducing costs and improving production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of circuit breakers, specifically to an arc-extinguishing chamber installation structure for a circuit breaker. Background Technology

[0002] The breaking capacity of a circuit breaker determines whether it can quickly disconnect the circuit under abnormal conditions such as short circuits to prevent equipment damage or the escalation of accidents. This performance indicator is directly related to the safety and stability of the power system and is one of the important parameters of a circuit breaker.

[0003] Common miniature circuit breakers have rated breaking capacities of 3kA, 4.5kA, 6kA, and 10kA. The internal configurations differ depending on the breaking capacity; higher breaking capacity means higher manufacturing costs. When selecting circuit breakers, users consider procurement costs and, while meeting performance requirements, will often choose those with lower breaking capacities to improve cost-effectiveness.

[0004] The increase in circuit breaker specifications means an increase in production materials. Some specifications have low demand and long parts consumption cycles, resulting in material stagnation and waste. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model provides an arc-extinguishing chamber installation structure for circuit breakers that reduces costs and improves production efficiency.

[0006] The technical solution adopted by this utility model is: a circuit breaker housing installation structure, which includes a housing and an arc-extinguishing chamber. The arc-extinguishing chamber includes a first arc-extinguishing chamber and a second arc-extinguishing chamber with different external dimensions. The housing is provided with a cavity to accommodate the arc-extinguishing chamber and a positioning component for positioning when the first arc-extinguishing chamber and the second arc-extinguishing chamber are installed. The positioning component includes a number of first baffles corresponding to the left side of the arc-extinguishing chamber and a number of stop blocks corresponding to the right side of the arc-extinguishing chamber.

[0007] The positioning assembly also includes an upper positioning plate and a lower positioning plate installed on the upper and lower sides of the chamber and in contact with the upper and lower sides of the second arc-extinguishing chamber.

[0008] The positioning component also includes a second baffle installed on the right side of the chamber, and the end of the grid plate of the first arc-extinguishing chamber contacts the left end of the second baffle.

[0009] The upper and lower surfaces of the stop block are in contact with the grid plates of the first arc-extinguishing chamber, respectively.

[0010] The left end face of the stop block contacts the end of the grid plate of the second arc-extinguishing chamber.

[0011] The left end faces of all the first baffles are flush with the vertical plane; the right end faces of all the second baffles are flush with the vertical plane.

[0012] The first baffle is an exhaust baffle. The second baffle is either an air vent baffle or an air-generating plate. The upper positioning plate is an upper arc-drawing plate, and the lower positioning plate is a lower arc-drawing plate.

[0013] The beneficial effects of this utility model are: the circuit breaker can be installed with arc-extinguishing chambers of different breaking capacities using only one type of housing, reducing the types of housings, optimizing the material management process, reducing downtime due to material shortages or errors during production, thereby significantly improving production efficiency, helping to reduce inventory backlog, avoid over-purchasing and transportation problems, and thus reducing material procurement and management costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the arc-extinguishing chamber installation structure of the circuit breaker according to an embodiment of the present invention.

[0015] Figure 2 This is a structural diagram of the installation of the first arc-extinguishing chamber.

[0016] Figure 3 This is a structural diagram of the installation of the second arc-extinguishing chamber. Detailed Implementation

[0017] The embodiments of this utility model will be further described below with reference to the accompanying drawings: As shown in the figure, a circuit breaker housing mounting structure includes a housing 1 and an arc-extinguishing chamber. The arc-extinguishing chamber includes a first arc-extinguishing chamber 3 and a second arc-extinguishing chamber 4 with different external dimensions. The housing is provided with a cavity to accommodate the arc-extinguishing chambers and a positioning component for positioning when one of the first arc-extinguishing chamber 3 and the second arc-extinguishing chamber 4 is installed. In this embodiment, the first arc-extinguishing chamber is a low breaking capacity arc-extinguishing chamber, and the second arc-extinguishing chamber is a high breaking capacity arc-extinguishing chamber. The two are completely different in size and shape.

[0018] When installing the low breaking capacity arc-extinguishing chamber 3, the positioning assembly includes a plurality of first baffles 5 corresponding to the left side of the arc-extinguishing chamber, a second baffle 9 installed on the right side of the chamber, and a plurality of blocks 6 corresponding to the right side of the arc-extinguishing chamber. The upper and lower surfaces of the blocks 6 are in contact with the grid plates of the low breaking capacity arc-extinguishing chamber 3, and the ends of the grid plates of the low breaking capacity arc-extinguishing chamber 3 are in contact with the left end of the second baffle 9.

[0019] When installing the high breaking capacity arc-extinguishing chamber 4, the positioning assembly includes a plurality of first baffles 5 corresponding to the left side of the arc-extinguishing chamber, a plurality of baffles 6 corresponding to the right side of the arc-extinguishing chamber, and an upper positioning plate 7 and a lower positioning plate 8 installed on the upper and lower sides of the chamber and in contact with the upper and lower sides of the high breaking capacity arc-extinguishing chamber 4. The left end face of the baffles 6 is in contact with the end of the grid plate of the high breaking capacity arc-extinguishing chamber 4.

[0020] Circuit breakers can be installed with arc-extinguishing chambers of different breaking capacities using only one type of housing, reducing the variety of housing types. This can optimize material management processes, reduce downtime due to material shortages or errors during production, thereby significantly improving production efficiency, helping to reduce inventory backlog, avoid over-purchasing and transportation problems, and thus reduce material procurement and management costs.

[0021] The left end faces of all the first baffles 5 are flush with the vertical plane; the right end faces of all the second baffles 9 are flush with the vertical plane.

[0022] The first baffle 5 is an exhaust baffle, and the second baffle 9 is an air venting channel baffle or an air generating plate (not shown). It can serve as an exhaust guide and also as a positioning baffle for the arc extinguishing chamber. The upper positioning plate 7 is an upper arc-drawing plate, and the lower positioning plate 8 is a lower arc-drawing plate. This technical solution can set independent upper and lower positioning plates, or the upper arc-drawing plate can be used to replace the upper positioning plate, and the lower arc-drawing plate can be used to replace the lower positioning plate. In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0024] Please note to all technical personnel: Although this utility model has been described according to the specific embodiments above, the inventive concept of this utility model is not limited to this utility model. Any modifications that utilize the inventive concept will be included within the scope of protection of this patent.

Claims

1. An installation structure of an arc-extinguishing chamber of a circuit breaker, comprising a housing (1) and an arc-extinguishing chamber, characterized by: The arc-extinguishing chamber includes a first arc-extinguishing chamber (3) and a second arc-extinguishing chamber (4) with different external dimensions. The housing is provided with a cavity for accommodating the arc-extinguishing chamber and a positioning component for positioning when one of the first arc-extinguishing chamber (3) and the second arc-extinguishing chamber (4) is installed.

2. The circuit breaker arc chute mounting structure according to claim 1, characterized by: The positioning component includes a number of first baffles (5) corresponding to the left side of the arc-extinguishing chamber and a number of baffles (6) corresponding to the right side of the arc-extinguishing chamber.

3. The circuit breaker arc chute mounting structure according to claim 2, characterized by: The positioning assembly also includes an upper positioning plate (7) and a lower positioning plate (8) installed on the upper and lower sides of the chamber and in contact with the upper and lower sides of the second arc-extinguishing chamber (4).

4. The circuit breaker arc chute mounting structure according to claim 2, characterized by: The positioning assembly also includes a second baffle (9) installed on the right side of the chamber, and the end of the grid plate of the first arc-extinguishing chamber (3) contacts the left end of the second baffle (9).

5. The circuit breaker arc chute mounting structure according to claim 2, characterized by: The upper and lower surfaces of the stop block (6) are in contact with the grid plates of the first arc-extinguishing chamber (3).

6. The circuit breaker arc chute mounting structure according to claim 2, characterized by: The left end face of the stop block (6) is in contact with the end of the grid plate of the second arc-extinguishing chamber (4).

7. The circuit breaker arc chute mounting structure according to claim 4, characterized by: The left end faces of all the first baffles (5) are flush with the vertical plane; the right end faces of all the second baffles (9) are flush with the vertical plane.

8. The circuit breaker arc chute mounting structure according to any one of claims 2 to 7, characterized by: The first baffle (5) is an exhaust baffle.

9. The circuit breaker arc chute mounting structure according to claim 4 or 7, characterized by: The second baffle (9) is an air vent baffle or an air-generating plate.

10. The arc chute mounting structure of claim 3, wherein: The upper positioning plate (7) is an upper arc-drawing plate, and the lower positioning plate (8) is a lower arc-drawing plate.

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