A miniature circuit breaker with gas reservoir structure

Abstract

A small circuit breaker with gas storage tank structure. Mainly solve the problem that the gas is easy to flow everywhere when the conventional circuit breaker breaks. It is characterized by: it also includes a first gas storage tank (11) arranged in the shell opposite to the first position; a second gas storage tank (12) arranged in the shell opposite to the second position; an arc running channel (13) arranged between the moving contact and the arc extinguishing chamber, and the first gas storage tank and the second gas storage tank are arranged opposite to the arc running channel. The utility model provides a small circuit breaker with gas storage tank structure, two gas storage cavities are arranged opposite to the two positions of the moving contact opening and closing, and the gas can temporarily store and flow to the arc running channel, thereby reducing the irregular flow of the gas.

Description

Technical Field

[0001] This utility model relates to the field of circuit breakers, specifically to a miniature circuit breaker with a gas storage tank structure. Background Technology

[0002] Miniature circuit breakers, also known as micro circuit breakers, are suitable for overload and short-circuit protection of circuits, and can also be used for infrequent switching of circuits under normal conditions. Miniature circuit breakers are mainly used in various places such as industrial, commercial, high-rise buildings, and residential buildings.

[0003] When a circuit breaker breaks, sparks will appear at the moving contact and stationary contact, accompanied by gas expansion. Conventional circuit breakers do not have a gas storage structure, so the gas can easily flow around. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides a miniature circuit breaker with a gas storage tank structure, which mainly solves the problem that gas tends to flow around when a conventional circuit breaker breaks.

[0005] The technical solution of this utility model is as follows:

[0006] A miniature circuit breaker with a gas storage tank structure includes a housing, within which are a stationary contact, a moving contact, and an arc-extinguishing chamber. The moving contact is disposed opposite to the stationary contact and includes a first position in contact with the stationary contact and a second position when the circuit breaker is open.

[0007] The first gas storage tank is disposed inside the shell and is positioned opposite to the first position;

[0008] The second gas storage tank is located inside the housing and is positioned opposite to the second position;

[0009] An arc-running channel is located between the moving contact and the arc-extinguishing chamber, and the first gas storage tank and the second gas storage tank are arranged opposite to the arc-running channel.

[0010] The housing is provided with a first limiting frame, and the first gas storage tank is located within the first limiting frame.

[0011] The first limiting frame includes a first wall and a second wall. The first wall is located above the stationary contact and its height is higher than that of the second wall. The second wall is located below the first wall.

[0012] The housing is provided with a second limiting frame, and the second gas storage tank is located within the second limiting frame.

[0013] The second limiting frame includes a third wall and a fourth wall. The third wall is disposed opposite to the arc-extinguishing chamber, and the height of the third wall is higher than that of the fourth wall. The fourth wall is disposed between the first wall and the arc-extinguishing chamber.

[0014] The height of the fourth wall is higher than the height of the second wall.

[0015] It also includes a fifth wall, which is an arc-shaped wall, with one end connected to the third wall and the other end connected to the fourth wall.

[0016] An arc-initiating plate is provided inside the housing. One end of the arc-initiating plate is positioned opposite to the arc-extinguishing chamber, and a second arc-initiating plate is welded to the back of the arc-initiating plate.

[0017] The beneficial effects of this utility model are: This utility model provides a small circuit breaker with a gas storage tank structure. Two gas storage chambers are provided at the two positions of the moving contact opening and closing. The gas can be temporarily stored and then flow to the arc-running channel, reducing the irregular flow of gas. Attached Figure Description

[0018] Figure 1 This is a perspective view of one embodiment of the present invention.

[0019] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0020] Figure 3 This is a partial perspective view of the housing according to an embodiment of the present invention.

[0021] Figure 4 This is a partial perspective view of one embodiment of the present invention. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings. A miniature circuit breaker with a gas storage tank structure includes a housing 1, within which are a stationary contact 2, a moving contact 3, and an arc-extinguishing chamber 4. The moving contact is disposed opposite to the stationary contact and includes a first position in contact with the stationary contact and a second position when the circuit breaker is disconnected. The circuit breaker also includes a first gas storage tank 11 disposed within the housing and opposite to the first position; a second gas storage tank 12 disposed within the housing and opposite to the second position; and an arc-running channel 13 disposed between the moving contact and the arc-extinguishing chamber. The first and second gas storage tanks are opposite to the arc-running channel. The moving contact disconnects very quickly, typically resulting in numerous electric sparks at the moment of disconnection and at the second position after complete disconnection. The two gas storage tanks of this application can store the instantaneously released gas, which will be discharged from the gas storage tanks and flow into the arc-running channel when the pressure is high.

[0023] In this embodiment, as shown in the figure, a first limiting frame 14 is provided inside the housing, and the first gas storage tank is disposed within the first limiting frame. It can be formed by multiple walls surrounding it.

[0024] In this embodiment, as shown in the figure, the first limiting frame includes a first wall 141 and a second wall 142. The first wall is located above the stationary contact, and its height is higher than that of the second wall. The second wall is located below the first wall. The first wall being located above the stationary contact prevents gas from flowing upward and encourages it to flow more into the first gas storage tank. When a certain amount is stored, the gas flows out from the second wall (located on the arc-running channel side) and into the arc-running channel.

[0025] In this embodiment, as shown in the figure, a second limiting frame 15 is provided inside the housing, and the second gas storage tank is located inside the second limiting frame.

[0026] In this embodiment, as shown in the figure, the second limiting frame includes a third wall 151 and a fourth wall 152. The third wall is disposed opposite to the arc-extinguishing chamber, and the height of the third wall is higher than that of the fourth wall. The fourth wall is located between the first wall and the arc-extinguishing chamber. The third wall acts as a barrier, and the fourth wall is located "opposite" to the third wall, allowing gas to flow out along the third wall towards the arc-extinguishing chamber.

[0027] In this embodiment, as shown in the figure, the height of the fourth wall is higher than the height of the second wall.

[0028] In this embodiment, as shown in the figure, a fifth wall 153 is also included. The fifth wall is an arc-shaped wall, with one end connected to the third wall and the other end connected to the fourth wall. This further facilitates the internal flow of gas.

[0029] In this embodiment, as shown in the figure, an arc-initiating plate 5 is provided inside the housing. One end of the arc-initiating plate is positioned opposite to the arc-extinguishing chamber, and a second arc-initiating plate 51 is welded to the back of the arc-initiating plate. This increases strength.

[0030] 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.

[0031] 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.

[0032] 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. A miniature circuit breaker with a gas storage tank structure, comprising a housing (1), wherein a stationary contact (2), a moving contact (3), and an arc-extinguishing chamber (4) are provided inside the housing, the moving contact being disposed opposite to the stationary contact, the moving contact including a first position in contact with the stationary contact and a second position when the circuit breaker is disconnected, characterized in that: Also includes The first gas storage tank (11) is located inside the shell and is positioned opposite to the first position; The second gas storage tank (12) is located inside the housing and is positioned opposite to the second position; The arc-running channel (13) is located between the moving contact and the arc-extinguishing chamber, and the first gas storage tank and the second gas storage tank are arranged opposite to the arc-running channel.

2. A miniature circuit breaker with a gas storage tank structure according to claim 1, characterized in that: The housing is provided with a first limiting frame (14), and the first gas storage tank is located inside the first limiting frame.

3. A miniature circuit breaker with a gas storage tank structure according to claim 2, characterized in that: The first limiting frame includes a first wall (141) and a second wall (142). The first wall is located above the stationary contact, and the height of the first wall is higher than that of the second wall. The second wall is located below the first wall.

4. A miniature circuit breaker with a gas storage tank structure according to claim 3, characterized in that: The housing is provided with a second limiting frame (15), and the second gas storage tank is located inside the second limiting frame.

5. A miniature circuit breaker with a gas storage tank structure according to claim 4, characterized in that: The second limiting frame includes a third wall (151) and a fourth wall (152). The third wall is disposed opposite to the arc-extinguishing chamber, and the height of the third wall is higher than that of the fourth wall. The fourth wall is disposed between the first wall and the arc-extinguishing chamber.

6. A miniature circuit breaker with a gas storage tank structure according to claim 5, characterized in that: The height of the fourth wall is higher than the height of the second wall.

7. A miniature circuit breaker with a gas storage tank structure according to claim 6, characterized in that: It also includes a fifth wall (153), which is an arc-shaped wall, with one end connected to the third wall and the other end connected to the fourth wall.

8. A miniature circuit breaker with a gas storage tank structure according to any one of claims 1-7, characterized in that: An arc-initiating plate (5) is provided inside the shell. One end of the arc-initiating plate is positioned opposite to the arc-extinguishing chamber. A second arc-initiating plate (51) is welded to the back of the arc-initiating plate.

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