High-voltage contact arc extinguishing system

Abstract

The utility model discloses a high voltage contact arc extinguishing system, comprising a static contact, a moving contact and an arc extinguishing chamber, the static contact and the moving contact are both installed close to the bottom of the arc extinguishing chamber, and a grid sheet increment structure is arranged in the arc extinguishing chamber; the grid plate increment structure comprises a plurality of arc extinguishing grid plates, the plurality of arc extinguishing grid plates are arranged in the arc extinguishing chamber in an N shape with a downward opening, and the static contact and the moving contact are respectively arranged at the left end and the right end of the bottom of the plurality of arc extinguishing grid plates which are arranged close to the N shape. Through the above mode, according to the high-voltage contact arc extinguishing system of the utility model, the grid sheet increment structure is arranged in the arc extinguishing structure, so that the number of the arc extinguishing grid sheets can be increased under the condition that the housing of the circuit breaker is not changed, thereby improving the arc extinguishing effect.

Description

Technical Field

[0001] The utility model belongs to the field of electricity, and particularly relates to a high-voltage contact arc extinguishing system. Background Art

[0002] A circuit breaker is a switching device used to protect circuits and electrical equipment, and is widely used in circuit protection in the fields of home, commerce and industry. It has a compact structure, occupies a small space, is convenient to be installed in a distribution box or electrical equipment, and usually has a manual operation handle for convenient switching operation.

[0003] Due to the limitation of its structure, the number of arc extinguishing grid plates that can be installed in the existing circuit breaker is limited, thus affecting its arc extinguishing effect. Summary of the Utility Model

[0004] The main technical problem to be solved by the utility model is to provide a high-voltage contact arc extinguishing system, which can improve the arc extinguishing effect without changing the circuit breaker housing.

[0005] To solve the above technical problem, a technical solution adopted by the utility model is: a high-voltage contact arc extinguishing system, including a static contact, a moving contact and an arc extinguishing chamber. The static contact and the moving contact are both installed near the bottom of the arc extinguishing chamber, and a grid plate increment structure is arranged in the arc extinguishing chamber;

[0006] The grid plate increment structure includes a plurality of arc extinguishing grid plates, and the plurality of arc extinguishing grid plates are arranged in an N shape with the opening downward in the arc extinguishing chamber. The static contact and the moving contact are respectively arranged at the left and right ends near the bottom of the plurality of arc extinguishing grid plates arranged in the N shape.

[0007] In a preferred embodiment of the utility model, the interval distance between the opposite positions of the plurality of arc extinguishing grid plates arranged in the N shape gradually decreases from bottom to top.

[0008] In a preferred embodiment of the utility model, the static contact is installed in the circuit breaker housing through a bracket.

[0009] In a preferred embodiment of the utility model, a U-shaped arc guiding plate is installed on the top of the static contact. The U-shaped arc guiding plate has an opening to the left, one side wall of which is fixed to the static contact, and the other side wall is close to the left bottom of the plurality of arc extinguishing grid plates arranged in the N shape.

[0010] In a preferred embodiment of the utility model, an arc guiding contact is arranged on the top of the moving contact, and the arc guiding contact is close to the right bottom of the plurality of arc extinguishing grid plates arranged in the N shape.

[0011] In a preferred embodiment of the utility model, the arc guiding contact is arc-shaped.

[0012] The beneficial effects of the present utility model are as follows: A high-voltage contact arc extinguishing system of the present utility model is provided with a grid sheet increment structure inside the arc extinguishing structure, which can increase the number of arc extinguishing grid sheets while ensuring that the breaker housing remains unchanged, thereby improving the arc extinguishing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 FIG. is a schematic structural diagram of a high-voltage contact arc extinguishing system.

[0014] Figure 2 is Figure 1 a cross-sectional view during installation.

[0015] The markings of each component in the drawings are as follows: 1, bracket; 2, static contact; 3, arc ignition plate; 4, moving contact; 5, arc ignition contact; 6, arc extinguishing chamber; 7, arc extinguishing grid sheet; 8, static contact point; 9, moving contact point. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following describes in detail the preferred embodiments of the present utility model with reference to the accompanying drawings, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making the scope of protection of the present utility model more clearly defined.

[0017] Please refer to Figure 1 and Figure 2 , the embodiments of the present utility model include:

[0018] A high-voltage contact arc extinguishing system includes a static contact 2, a moving contact 4, and an arc extinguishing chamber 6. The static contact 2 and the moving contact 4 are both installed near the bottom of the arc extinguishing chamber 6. The arc extinguishing chamber 6 is provided with a grid sheet increment structure, which can increase the number of arc extinguishing grid sheets 7 while ensuring that the breaker housing remains unchanged, thereby improving the arc extinguishing effect.

[0019] The grid sheet increment structure includes a plurality of arc extinguishing grid sheets 7. The plurality of arc extinguishing grid sheets 7 are arranged in an N shape with the opening facing downwards inside the arc extinguishing chamber 6. Without changing the size of the original arc extinguishing chamber 6, the number of arc extinguishing grid sheets 7 is increased, thereby improving the arc extinguishing effect.

[0020] The static contact 2 and the moving contact 4 are respectively arranged at the left and right ends near the bottom of the plurality of arc extinguishing grid sheets 7 arranged in an N shape. An arc is generated between the static contact point 8 of the static contact 2 and the moving contact point 9 of the moving contact 4. With the heat generated by the arc itself, the arc rises along the arc ignition plate 3 and the arc ignition contact 5 until it reaches the top of the arc ignition plate 3 and the arc ignition contact point.

[0021] The spacing distance between the opposite positions of the plurality of arc extinguishing grid sheets 7 arranged in an N shape gradually decreases from bottom to top, and this structure matches the final structure of the arc.

[0022] The static contact 2 is installed in the circuit breaker housing through the bracket 1. A U-shaped arc guide plate 3 is installed on the top of the static contact 2. The U-shaped arc guide plate 3 opens to the left. One side wall of it is fixed to the static contact 2, and the other side wall is close to the left bottom of several arc extinguishing grid plates 7 arranged in an N shape.

[0023] An arc guide contact is provided at the top of the moving contact 4. The arc guide contact is close to the right bottom of several arc extinguishing grid plates 7 arranged in an N shape. The arc guide contact cooperates with the arc guide plate 3 so that the arc rises to the top under the heat generated by itself and then enters several arc extinguishing grid plates 7 arranged in an N shape.

[0024] The arc guide contact is arc-shaped. Since the arc is always perpendicular to the contact surface during transmission, the arc-shaped arc guide contact can facilitate the transmission of the arc more conveniently.

[0025] During operation, first, an arc is generated between the static contact 8 of the static contact 2 and the moving contact 9 of the moving contact 4. With the heat generated by the arc itself, the arc rises along the arc guide plate 3 and the arc guide contact 5 until it reaches the top of the arc guide plate 3 and the arc guide contact. At this time, under the action of heat, the middle of the arc continues to rise and extends into several arc extinguishing grid plates 7 arranged in an N shape. At this time, since the current directions on both sides of the arc are opposite, a repulsive force is generated, causing both sides of the arc to move to both sides of several arc extinguishing grid plates 7 arranged in an N shape, thereby cutting the arc into multiple segments and extinguishing the arc.

[0026] Different from the prior art, in a high-voltage contact arc extinguishing system of the present utility model, a grid plate increment structure is provided inside the arc extinguishing structure, which can increase the number of arc extinguishing grid plates without changing the circuit breaker housing, thereby improving the arc extinguishing effect.

[0027] In the description of the present utility model, it should be noted that the components are all common standard components or components known to those skilled in the art. Their structures and principles can all be known by those skilled in the art through technical manuals or obtained through conventional test methods. The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this utility model is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0028] The above are only embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of the present utility model.

Claims

1. A high voltage contact arc extinguishing system, comprising a static contact, a moving contact and an arc extinguishing chamber, wherein the static contact and the moving contact are both installed near the bottom of the arc extinguishing chamber, characterized in that: The arc extinguishing chamber is provided with a grid piece incremental structure; The grid increment structure comprises a plurality of arc extinguishing grids, which are arranged in an N-shape with openings downward in the arc extinguishing chamber, and the static contact and the moving contact are respectively arranged at the left and right ends of the bottom of the plurality of arc extinguishing grids arranged in the N-shape.

2. A high voltage contact arc extinguishing system according to claim 1, characterized in that: The spacing distances between the arc-extinguishing grids arranged in N shape decrease from small to high.

3. A high voltage contact arc extinguishing system according to claim 1, characterized in that: The static contact is installed in the circuit breaker housing through a bracket.

4. A high voltage contact arc extinguishing system according to claim 3, characterized in that: A U-shaped arc-striking plate is installed on the top of the static contact. The U-shaped arc-striking plate opens to the left, one side wall of which is fixed to the static contact, and the other side wall is close to the left bottom of the plurality of arc-extinguishing grids arranged in an N shape.

5. A high voltage contact arc extinguishing system according to claim 1, characterized in that: An arc-striking contact is arranged on the top of the moving contact, and the arc-striking contact is close to the right bottom of a plurality of arc-extinguishing grids arranged in an N shape.

6. A high voltage contact arc extinguishing system according to claim 5, characterized in that: The arc-striking contact is in an arc shape.

Images