Short arc prevention contact structure and circuit breaker thereof

Abstract

The utility model relates to a short arc prevention contact structure, which is characterized in that the short arc prevention contact structure comprises a moving contact and a static contact, the moving contact and the static contact are provided with mutually contacted contacts, and a receding groove is formed on one side of the moving contact facing the contacts and is used for increasing the shortest contact distance between the moving contact and the static contact. The utility model further provides a circuit breaker which is provided with the short arc prevention contact structure. According to the utility model, the shortest contact distance between the moving contact and the static contact is increased by changing the structure of the moving contact and arranging the retracted abdicating groove, so that the breaking times of the circuit breaker are improved, and the service life of the circuit breaker is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker contact technology, and in particular to a short-arc protection contact structure and its circuit breaker. Background Technology

[0002] like Figure 1 As shown, during the short-circuit test of the circuit breaker, after the moving and stationary contacts are burned out, when the secondary current passes through, in addition to the normal contact of the contacts, a secondary short circuit occurs between the moving and stationary contacts at the front end of the stationary contact. Because it is an abnormal contact, a large arc voltage is generated at the moment of the short circuit, which directly burns out the circuit breaker and the power transmission and distribution system. Moreover, when the arc is extinguished, the moving and stationary contacts stick together, causing the circuit breaker to be unable to separate the circuit. Summary of the Invention

[0003] The purpose of this invention is to provide a contact structure that prevents short arcing, so as to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A short-arc prevention contact structure is characterized in that it includes a moving contact and a stationary contact, wherein the moving contact and the stationary contact are provided with contact points that contact each other, and a relief groove is formed on the side of the moving contact facing the contact point to increase the shortest contact distance between the moving contact and the stationary contact.

[0006] The present invention further comprises that the movable contact is hinged to the rotating shaft, the rotating shaft has a mounting groove, a support member is provided in the mounting groove, the support member is connected to one end of the movable contact through a first shaft member, the portion of the movable contact located in the mounting groove has an extension portion, a hinge hole is formed on the extension portion, a second shaft member is provided in the hinge hole, a pressure plate is also sleeved on the second shaft, and a spring is provided between the pressure plate and the inner wall of the rotating shaft.

[0007] The present invention further provides that the number of moving contacts is consistent with the number of mounting slots.

[0008] The present invention is further provided that the number of springs provided in the mounting groove is 2, which are distributed on both sides of the moving contact.

[0009] This utility model also provides a circuit breaker, characterized in that it has the aforementioned anti-short-arc contact structure.

[0010] The beneficial effects of this utility model are as follows: By modifying the structure of the moving contact and setting a recessed clearance groove, the shortest contact distance between the moving contact and the stationary contact is increased, thereby increasing the number of circuit breakers and extending the service life of the circuit breaker. Attached Figure Description

[0011] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0012] Figure 1 This is a structural diagram of the existing design.

[0013] Figure 2 This is a structural schematic diagram of an embodiment of the present utility model.

[0014] Figure 3 This is a schematic diagram of the structure after removing the rotating shaft in an embodiment of this utility model.

[0015] Reference numerals: 10, moving contact; 20, stationary contact; 30, contact point; 40, clearance groove; 50, mounting groove; 60, support member; 70, first shaft member; 80, second shaft member; 90, pressure plate; 100, spring; 110, rotating shaft; Detailed Implementation

[0016] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0017] like Figures 2 to 3 As shown, this utility model provides an anti-short arc contact structure, including a moving contact 10 and a stationary contact 20. The moving contact 10 and the stationary contact 20 are provided with contact points 30 that contact each other. A relief groove 40 is formed on the side of the moving contact 10 facing the contact point 30 to increase the shortest contact distance between the moving contact 10 and the stationary contact 20.

[0018] In this utility model, the movable contact 10 is hinged to the rotating shaft 110, and a mounting groove 50 is formed in the rotating shaft 110. The number of movable contacts 10 is consistent with the number of mounting grooves 50.

[0019] A support member 60 is provided in the mounting groove 50. The support member 60 is connected to one end of the moving contact 10 through a first shaft member 70. The portion of the moving contact 10 located in the mounting groove 50 forms an extension. A hinge hole is formed on the extension. A second shaft member 80 is provided in the hinge hole. A pressure plate 90 is also sleeved on the second shaft. A spring 100 is provided between the pressure plate 90 and the inner wall of the rotating shaft 110. The number of springs 100 provided in the mounting groove 50 is 2, distributed on both sides of the moving contact 10.

[0020] This utility model also provides a circuit breaker having the aforementioned anti-short-arc contact structure.

[0021] In this invention, by modifying the structure of the moving contact 10 and setting a recessed clearance groove 40, the shortest contact distance between the moving contact 10 and the stationary contact 20 is increased, thereby increasing the number of circuit breakers and extending the service life of the circuit breaker.

[0022] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" as used throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0023] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes that element.

[0024] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept by means of the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A short-arc prevention contact structure, characterized in that, It includes a moving contact and a stationary contact, wherein the moving contact and the stationary contact are provided with contact points that make contact with each other, and a relief groove is formed on the side of the moving contact facing the contact point to increase the shortest contact distance between the moving contact and the stationary contact.

2. The anti-short-arc contact structure according to claim 1, characterized in that, The moving contact is hinged to a rotating shaft, and a mounting groove is formed inside the rotating shaft. A support member is provided in the mounting groove. The support member is connected to one end of the moving contact through a first shaft member. The portion of the moving contact located in the mounting groove forms an extension portion. A hinge hole is formed on the extension portion. A second shaft member is provided in the hinge hole. A pressure plate is also sleeved on the second shaft. A spring is provided between the pressure plate and the inner wall of the rotating shaft.

3. The anti-short-arc contact structure according to claim 2, characterized in that, The number of moving contacts is consistent with the number of mounting slots.

4. The anti-short-arc contact structure according to claim 2, characterized in that, The number of springs installed in the mounting groove is 2, distributed on both sides of the moving contact.

5. A circuit breaker, characterized in that, It has the anti-short arc contact structure as described in any one of claims 1-4.

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