L-type circuit breaker movable contact structure

Abstract

The utility model discloses a kind of L-type circuit breaker movable contact structure, to provide a kind of L-type circuit breaker movable contact structure, which improves mechanical stability, optimizes electrical performance and reduces operating force, its technical scheme main point is including the movable contact body of L-type, at least three through holes for installation or cooperation connection are equipped on the movable contact body, respectively first through hole, second through hole, third through hole, the first through hole, second through hole are spaced distribution along the long side direction of movable contact body, the third through hole is located in the short side end region of movable contact body, and the long side side of movable contact body is equipped with the protruding cooperation part for adapting with other components of circuit breaker. The utility model is applicable to the technical field of circuit breaker.

Description

Technical Field

[0001] This utility model relates to the technical field of circuit breakers, and more specifically, to an L-shaped circuit breaker moving contact structure. Background Technology

[0002] As a key component of low-voltage power grids, circuit breakers are protective devices that disconnect circuits during overcurrent. However, the electric arc generated when the moving and stationary contacts break can easily burn the contacts, affecting their connection and electrical lifespan, as well as their breaking performance. To address this issue, arc-striking plates are often used to transfer the arc. The initial distance between the moving contact head and the arc-striking plate is small, but due to contact erosion and wear, this distance tends to continuously decrease, causing interference and making the contact between the moving and stationary contacts unreliable. This leads to increased temperature rise and reduced reliability of the circuit breaker. Furthermore, traditional circuit breaker moving contact outputs are mostly horizontal and straight-out. In space-constrained scenarios such as new energy electrical cabinets, external busbars need to be installed with bends, resulting in drawbacks such as large space occupation, high material costs, and complex busbar design and assembly within the distribution cabinet. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide an L-shaped circuit breaker moving contact structure that improves mechanical stability, optimizes electrical performance, and reduces operating force.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an L-shaped circuit breaker moving contact structure, comprising an L-shaped moving contact body, wherein the moving contact body is provided with at least three through holes for installation or mating connection, namely a first through hole, a second through hole, and a third through hole, wherein the first through hole and the second through hole are spaced apart along the long side of the moving contact body, the third through hole is located in the short side end region of the moving contact body, and a protruding mating part for adaptation with other components of the circuit breaker is provided on one side of the long side of the moving contact body.

[0005] The present invention is further configured such that: the cross-section of the protruding mating part is rectangular, and the length direction of the protruding mating part is consistent with the length direction of the long side of the moving contact body.

[0006] The present invention is further configured such that the diameters of the first through hole, the second through hole, and the third through hole are not completely the same, and the diameter of the third through hole is larger than that of the first through hole and the second through hole.

[0007] The present invention is further configured such that: the surface of the moving contact body is provided with an anti-oxidation coating, the anti-oxidation coating being a silver plating layer or a nickel plating layer.

[0008] The present invention is further configured such that: the moving contact body is made of a metal material with good electrical conductivity, and the metal material is copper or a copper alloy.

[0009] The present invention is further configured such that: the moving contact body has a groove and a semi-circular groove on both sides of its long side.

[0010] The beneficial effects of this utility model are:

[0011] 1. The moving contact body is provided with at least three through holes, namely a first through hole, a second through hole, and a third through hole, providing multiple mounting or mating connection positions. The first and second through holes are spaced apart along the long side of the moving contact body, allowing for different mounting points on the long side of the moving contact. This enables flexible adjustment of the mounting position according to the specific design and installation requirements of different circuit breakers, improving the adaptability and versatility of the moving contact with other components of the circuit breaker. A raised mating part is provided on one side of the long side of the moving contact body for fitting with other components of the circuit breaker. This part can precisely mate with corresponding grooves or other fitting structures in the circuit breaker, serving a positioning and guiding function. During assembly, the raised mating part guides the moving contact to be accurately installed in the designated position, ensuring the relative positional accuracy between the moving contact and other components, thus improving the accuracy and efficiency of assembly.

[0012] 2. The raised mating portion of the rectangular cross-section provides a larger and more uniform contact area when in contact with the corresponding component. Compared to other contact structures, the larger contact area reduces contact resistance, allowing current to flow more smoothly through the connection between the moving contact and other components. This helps reduce energy loss and heat generation, improves the circuit breaker's conductivity and electrical stability, and reduces faults and safety hazards caused by poor contact. During the circuit breaker's opening and closing process, stable contact and a larger contact area help disperse arc energy. The raised mating portion of the rectangular cross-section can better withstand the impact of the arc, reducing arc erosion on the contact surface.

[0013] 3. The diameters of the first, second, and third through holes are not entirely the same, with the third through hole having a larger diameter than the first and second through holes, thus meeting different connection requirements. Different components may require bolts or connectors of different diameters for connection. For example, the larger diameter third through hole can be used to connect components requiring larger connectors, such as larger conductor bars or heavier operating mechanism components, to ensure the strength and stability of the connection; while the smaller diameter first and second through holes can be used to connect components with relatively lower requirements for connection strength but requiring more precise positioning, such as small control components. The anti-oxidation coating (silver plating or nickel plating) on ​​the surface of the moving contact body can significantly improve the electrical performance of the moving contact. Both silver and nickel have good conductivity; the silver plating or nickel plating can reduce the surface resistance of the moving contact, allowing current to be conducted more smoothly on the surface of the moving contact. This helps reduce energy loss during conduction, improves the conductivity of the circuit breaker, reduces heat generation, and thus improves the electrical stability and reliability of the entire circuit breaker. Especially under high-load operation, the anti-oxidation coating can better ensure the electrical performance of the moving contacts and reduce contact damage and failure caused by heat.

[0014] 4. The moving contact body is made of a highly conductive metal material, such as copper or a copper alloy. Copper or copper alloys are commonly used conductive materials in the power industry, ensuring efficient current conduction within the moving contact and minimizing resistance and energy loss. During circuit breaker operation, the good conductivity prevents excessive heat generation when the moving contact carries high currents, ensuring stable operation under various load conditions and improving the overall power supply quality and efficiency. The grooves and semi-circular slots increase the surface area of ​​the moving contact body. During circuit breaker operation, the moving contact generates heat due to current flow; a larger surface area helps accelerate heat dissipation. Through air convection and thermal radiation, the grooves and semi-circular slots allow the moving contact to transfer heat to the surrounding environment more quickly, reducing its temperature. This is crucial for preventing damage from overheating and improving its operational stability and reliability in high-temperature environments. Improved heat dissipation effectively extends the service life of the moving contact. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 1 Reference numerals in the attached drawings: 1. Moving contact body; 2. First through hole; 3. Second through hole; 4. Third through hole; 5. Protruding mating part; 6. Groove; 7. Semicircular groove. Detailed Implementation

[0017] Reference Figure 1 The embodiments of this utility model will be further described below.

[0018] For ease of explanation, spatial relative terms such as “up,” “down,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “down” of other elements or features would be positioned “up” of those other elements or features. Therefore, the exemplary term “down” can encompass both up and down orientations. The device may be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0019] Moreover, relational terms such as “first” and “second” are used merely to distinguish one component from another that has the same name, without necessarily requiring or implying any such actual relationship or order between the components.

[0020] Figure 1 The diagram illustrates an L-shaped circuit breaker moving contact structure, comprising an L-shaped moving contact body 1. The moving contact body 1 has at least three through holes for installation or mating connections: a first through hole 2, a second through hole 3, and a third through hole 4. This provides multiple installation or mating positions. The first through holes 2 and the second through holes 3 are spaced apart along the long side of the moving contact body 1, allowing for different installation points along the long side of the moving contact. This enables flexible adjustment of the installation position according to the specific design and installation requirements of different circuit breakers, improving the adaptability and versatility of the moving contact in connecting with other components of the circuit breaker. The third through hole 4 is located at the short end of the moving contact body 1, and a protruding mating part 5 is provided on one side of the long side of the moving contact body 1 for adaptation with other components of the circuit breaker. This protruding mating part 5 can precisely mate with corresponding grooves 6 or other adapting structures in the circuit breaker, serving a positioning and guiding function. During assembly, the protruding mating part 5 guides the moving contact to the designated position accurately, ensuring the relative positional accuracy between the moving contact and other components, thus improving assembly accuracy and efficiency.

[0021] The raised mating part 5 has a rectangular cross-section, and its length direction is consistent with the long side of the moving contact body 1. When the rectangular-section raised mating part 5 contacts the corresponding component, it provides a larger and more uniform contact area. Compared to other contact structures, the larger contact area reduces contact resistance, allowing current to flow more smoothly through the connection between the moving contact and other components. This helps reduce energy loss and heat generation, improves the circuit breaker's conductivity and electrical stability, and reduces faults and safety hazards caused by poor contact. During the circuit breaker's opening and closing process, stable contact and a larger contact area help disperse arc energy. The rectangular-section raised mating part 5 can better withstand the impact of the arc, reducing arc erosion of the contact surface.

[0022] The diameters of the first through hole 2, the second through hole 3, and the third through hole 4 are not exactly the same. The diameter of the third through hole 4 is larger than that of the first through hole 2 and the second through hole 3, which can meet different connection requirements. Different components may require bolts or connectors of different diameters for connection. For example, the larger diameter of the third through hole 4 can be used to connect some components that require larger connectors, such as larger conductive busbars or heavier operating mechanism components, to ensure the strength and stability of the connection; while the smaller diameter of the first through hole 2 and the second through hole 3 can be used to connect some components that have relatively lower requirements for connection strength but require more precise positioning, such as small control elements.

[0023] The surface of the moving contact body 1 is coated with an anti-oxidation coating, which is either a silver plating layer or a nickel plating layer. This coating can significantly improve the electrical performance of the moving contact. Both silver and nickel have good conductivity; the silver or nickel plating layer reduces the surface resistance of the moving contact, allowing current to flow more smoothly. This helps reduce energy loss during conduction, improves the circuit breaker's conductivity, reduces heat generation, and thus enhances the overall electrical stability and reliability of the circuit breaker. Especially under high-load operation, the anti-oxidation coating better ensures the electrical performance of the moving contact, reducing contact damage and malfunctions caused by overheating.

[0024] The moving contact body 1 is made of a highly conductive metal material, such as copper or a copper alloy, which has excellent conductivity and is a commonly used conductive material in the power industry. Using copper or a copper alloy to make the moving contact body 1 ensures efficient current conduction within the moving contact, minimizing resistance and energy loss. During circuit breaker operation, the good conductivity prevents the moving contact from generating excessive heat even when carrying large currents, ensuring stable operation of the circuit breaker under different load conditions and improving the power supply quality and efficiency of the entire power system.

[0025] The moving contact body 1 has grooves 6 and semicircular grooves 7 on both sides along its long side, increasing the surface area of ​​the moving contact body 1. During circuit breaker operation, the moving contact generates heat due to current flow, and the larger surface area helps to accelerate heat dissipation. Through air convection and thermal radiation, the grooves 6 and semicircular grooves 7 enable the moving contact to transfer heat to the surrounding environment more quickly, reducing the temperature of the moving contact. This is of great significance for preventing damage to the moving contact due to overheating and improving its operational stability and reliability in high-temperature environments. The improved heat dissipation performance can effectively extend the service life of the moving contact.

[0026] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An L-shaped circuit breaker moving contact structure, comprising an L-shaped moving contact body (1), characterized in that, The moving contact body (1) is provided with at least three through holes for installation or mating connection, namely a first through hole (2), a second through hole (3), and a third through hole (4). The first through hole (2) and the second through hole (3) are distributed at intervals along the long side of the moving contact body (1). The third through hole (4) is located in the short side end area of ​​the moving contact body (1). The moving contact body (1) is provided with a protruding mating part (5) on one side of the long side for adaptation with other components of the circuit breaker.

2. The L-type circuit breaker moving contact structure according to claim 1, characterized in that, The cross-section of the protruding mating part (5) is rectangular, and the length direction of the protruding mating part (5) is consistent with the length direction of the long side of the moving contact body (1).

3. The moving contact structure of an L-type circuit breaker according to claim 1, characterized in that, The diameters of the first through hole (2), the second through hole (3), and the third through hole (4) are not exactly the same. The diameter of the third through hole (4) is larger than that of the first through hole (2) and the second through hole (3).

4. The moving contact structure of an L-type circuit breaker according to claim 1, characterized in that, The surface of the moving contact body (1) is provided with an anti-oxidation coating, which is a silver plating layer or a nickel plating layer.

5. The moving contact structure of an L-type circuit breaker according to claim 1, characterized in that, The moving contact body (1) is made of copper or copper alloy.

6. The moving contact structure of an L-type circuit breaker according to claim 1, characterized in that, The moving contact body (1) has a groove (6) and a semi-circular groove (7) on both sides of its long side.

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