Arc extinguishing chamber structure of miniature circuit breaker

Abstract

The utility model discloses a miniature circuit breaker arc extinguishing chamber structure comprising a housing, the housing is connected with separating sheets, the outer sides of the separating sheets are connected with connecting blocks, the connecting blocks are clamped on the housing, short sheets are arranged between the separating sheets, the short sheets are fixedly connected between the housing, and the lower end of the housing is connected with a heat conduction mechanism used for improving the heat radiation effect of an arc extinguishing chamber. A clamping groove is formed in the shell, the heat conduction mechanism comprises a cooling fin, a partition plate is connected to the shell, one end of the cooling fin penetrates through the partition plate and is connected with a side sheet, a butt joint plate is connected to the shell, a butt joint strip is connected to the butt joint plate, a butt joint groove is formed in the shell, and the butt joint strip and the butt joint groove are matched with each other. According to the utility model, the arc is further segmented by using the short sheet reduction, the high-strength arc can be processed on the premise of improving the heat dissipation effect of the arc extinguishing cover, and compared with the traditional arc extinguishing cover, the arc extinguishing cover can adapt to the arc of the industry under various conditions.

Description

Technical Field

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

[0002] A circuit breaker refers to a switching device that can close, carry and interrupt the current under normal circuit conditions and can close, carry and interrupt the current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their application scope. The boundary between high and low voltage is relatively blurred. Generally, electrical appliances above 3 kV are called high-voltage electrical appliances.

[0003] When the circuit breaker opens the circuit, the metal brake pads connecting the circuit can generate an electric arc. Since the electric arc has a high temperature, an arc extinguishing cover is provided inside the circuit breaker to eliminate the high-temperature electric arc generated inside the circuit breaker. The traditional arc extinguishing cover has a simple structure and a single arc extinguishing structure, and the heat dissipation effect is slightly lacking. When facing a high-intensity electric arc, the traditional arc extinguishing structure has a large load, generates a high amount of heat through the arc extinguishing structure, and it is difficult to discharge the heat inside the sealed circuit breaker structure, affecting the normal operation of the internal structure of the circuit breaker.

[0004] Based on this, an arc extinguishing cover structure of a miniature circuit breaker is proposed. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an arc extinguishing cover structure of a miniature circuit breaker to solve the above problems.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An arc extinguishing cover structure of a miniature circuit breaker includes a housing. A partition is connected to the housing. A connecting block is connected to the outside of the partition. The connecting block is clamped on the housing. Short pieces are arranged between the partitions. The short pieces are fixedly connected between the housings. A heat conduction mechanism for improving the heat dissipation effect of the arc extinguishing cover is connected to the lower end of the housing.

[0008] Preferably, a clamping groove is formed in the housing.

[0009] Preferably, the heat conduction mechanism includes heat dissipation fins. A partition is connected to the housing. One end of the heat dissipation fin penetrates through the partition and is connected to a side piece.

[0010] Preferably, a docking plate is connected to the housing.

[0011] Preferably, a docking strip is connected to the docking plate. A docking groove is formed in the housing. The docking strip and the docking groove are mutually fitted.

[0012] Preferably, there are two side pieces. The two side pieces are symmetrically arranged at both ends of the housing.

[0013] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows:

[0014] 1. Through the short film structure, the present application uses the short film to further divide the arc, and on the premise of improving the heat dissipation effect of the arc extinguishing cover, it can handle high-intensity arcs, and can adapt to the arcs in various industries compared with traditional arc extinguishing covers.

[0015] 2. By adopting the heat sink structure, the present application uses the heat sink to draw out the heat absorbed by the side piece. Since a through cavity is formed between the partition plate and the docking plate, when an internal and external temperature difference is formed, an air flow is generated between the structures, accelerating heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 shows a schematic structural diagram of the overall arc extinguishing cover provided by an embodiment of the present utility model;

[0017] Figure 2 shows an exploded structural diagram of the connection part of the docking plate provided by an embodiment of the present utility model;

[0018] Figure 3 shows a schematic structural diagram of the connection part of the short film provided by an embodiment of the present utility model.

[0019] Legend Explanation:

[0020] 1. Housing; 2. Partition plate; 3. Docking plate; 4. Side piece; 5. Separator; 6. Clamping groove; 7. Connecting block; 8. Heat sink; 9. Docking groove; 10. Docking strip; 11. Short film. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0022] Please refer to Figures 1-3 , the present utility model provides a technical solution:

[0023] An arc extinguishing cover structure for a miniature circuit breaker, including a housing 1, a partition piece 5 is connected to the housing 1, a connecting block 7 is connected to the outside of the partition piece 5. By setting the connecting block 7, the connection position of each partition piece 5 is ensured to be accurate, and the partition pieces 5 are ensured to be equidistantly arranged. The connecting block 7 is clamped on the housing 1. A short piece 11 is arranged between the partition pieces 5, and the short piece 11 is fixedly connected between the housing 1. The height of the short piece 11 is lower than the height of the partition piece 5. A heat conduction mechanism for improving the heat dissipation effect of the arc extinguishing cover is connected to the lower end of the housing 1.

[0024] Specifically, as Figure 2 shown, a clamping groove 6 is opened on the housing 1. By setting the clamping groove 6, the installation of the arc extinguishing cover is firm, and the connection position of the arc extinguishing cover is ensured to be accurate.

[0025] Specifically, as Figure 2 shown, the heat conduction mechanism includes a heat sink 8. A partition plate 2 is connected to the housing 1. One end of the heat sink 8 penetrates through the partition plate 2 and is connected with a side piece 4. The heat dissipation efficiency of the arc extinguishing cover is accelerated through the heat sink 8.

[0026] Specifically, as Figure 2 shown, a docking plate 3 is connected to the housing 1. By setting the docking plate 3, a cavity penetrating through both ends is formed, which can well protect the heat sink 8.

[0027] Specifically, as Figure 2 shown, a docking strip 10 is connected to the docking plate 3, and a docking groove 9 is opened on the housing 1. The docking strip 10 and the docking groove 9 fit with each other. By setting the structure of the docking strip 10 and the docking groove 9, the docking plate 3 can be quickly disassembled and assembled, which is convenient for overhauling the heat sink 8.

[0028] Specifically, as Figure 3 shown, there are two side pieces 4, and the two side pieces 4 are symmetrically arranged at both ends of the housing 1. By setting the structure of the side pieces 4, the heat dissipation effect of the arc extinguishing cover is accelerated.

[0029] In summary, for the arc extinguishing cover structure of a miniature circuit breaker provided in this embodiment, when it is necessary to eliminate the arc generated inside the circuit breaker, the arc is guided by the brake piece inside the circuit breaker to one side of the arc extinguishing cover. The arc is first divided by the partition piece 5. The arc with smaller intensity is directly eliminated under the action of the partition piece 5, while the arc with higher intensity will continue to move to the short piece 11, and its arc structure will be further divided. Among them, the arc energy will be absorbed by the short piece 11, the partition piece 5 and the side piece 4, and the generated heat will be introduced into the heat sink 8, increasing the heat dissipation area and improving the heat dissipation effect. Among them, the heat dissipation effect of the side piece 4 is better, and the short piece 11 and the partition piece 5 on one side can also transfer the heat to the surrounding air. A part of the heat is absorbed by the side piece 4 to complete the heat dissipation operation, reducing the heat of the surrounding environment, so that the circuit breaker is in a good operating environment.

[0030] The above description of the embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A small circuit breaker arc extinguishing cover structure, comprising a housing (1), characterized in that: The shell (1) is connected to a separator (5), the outer side of the separator (5) is connected to a connection block (7), the connection block (7) is snap-connected to the shell (1), a short piece (11) is arranged between the separators (5), the short piece (11) is fixedly connected between the shells (1), and the lower end of the shell (1) is connected to a heat conduction mechanism for improving the heat dissipation effect of the arc extinguishing cover.

2. The arc extinguishing cover structure of a small circuit breaker according to claim 1, characterized in that: The housing (1) is provided with a snap-in groove (6).

3. The arc extinguishing cover structure of a small circuit breaker according to claim 1, characterized in that: The heat conduction mechanism comprises a heat sink (8), a partition plate (2) is connected to the shell (1), and one end of the heat sink (8) passes through the partition plate (2) and is connected to a side plate (4).

4. The arc extinguishing cover structure of a small circuit breaker according to claim 3, characterized in that: A docking plate (3) is connected to the housing (1).

5. The arc extinguishing cover structure of a small circuit breaker according to claim 4, characterized in that: The docking plate (3) is connected to a docking strip (10), the shell (1) is provided with a docking groove (9), and the docking strip (10) and the docking groove (9) are fitted with each other.

6. The arc extinguishing cover structure of a small circuit breaker according to claim 3, characterized in that: Two side panels (4) are provided, and the two side panels (4) are symmetrically arranged at two ends of the shell (1).

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