Static contact plate assembly and circuit breaker
By setting ribs on the body of the static touch plate, the arc is guided and the strength is enhanced, the problem of deformation of the static touch plate assembly is solved and reliability is improved.
Patent Information
- Application Number
- CN202422229333.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-11
AI Technical Summary
Traditional static touch panel components are prone to deform when the arc blows to the arc extinguishing chamber, resulting in insufficient reliability.
A rib is provided on the first surface of the static contact plate body to guide the arc and increase the strength of the static contact plate body.
It enhances the durability of the static touch panel body, avoids deformation, and improves reliability.
Smart Images
Figure CN223092796U_ABST
Abstract
Description
Technical Field
[0001] Embodiments of the present application relate to the field of power equipment, and more particularly to a static contact plate assembly and a circuit breaker. Background Art
[0002] As a key device in the power system, a circuit breaker can cut off the circuit in time when the circuit is severely overloaded or short-circuited, and extinguish the arc generated when the circuit is disconnected, ensuring the safe and stable operation of the power system. As one of the core components in the circuit breaker, the static contact plate assembly is directly related to the on-off efficiency of the circuit and the arc extinguishing performance.
[0003] Traditional static contact plate assemblies usually include a static contact plate body and a static contact head. The static contact head is directly fixedly connected to the static contact plate body and is opposite to the moving contact head. The static contact plate body is also opposite to the arc extinguishing grid of the arc extinguishing chamber. When the connected static contact head and moving contact head are separated, the moving contact head moves away from the static contact head. During this process, an arc is generated and elongated. The arc is blown to the arc extinguishing chamber for extinguishing, thus ensuring the safety of electrical components.
[0004] However, in the existing static contact plate assemblies, when the arc is blown to the arc extinguishing chamber, it will pass through the static contact plate body, generating a large amount of heat and pressure, which easily causes the static contact plate body to deform and warp, affecting its power-on performance and arc ignition function, and resulting in insufficient reliability of the static contact plate body. Therefore, how to improve the reliability of the static contact plate body has become a technical problem to be solved. Summary of the Utility Model
[0005] In view of the above problems, embodiments of the present application provide a static contact plate assembly. A rib is provided on the first surface of the static contact plate body, which can not only guide the arc when the arc is generated, but also improve the strength of the static contact plate body, making the static contact plate body not easily deformed, thereby improving the reliability of the static contact plate body. Embodiments of the present application also provide a circuit breaker including such a static contact plate assembly.
[0006] One aspect of embodiments of the present application provides a static contact plate assembly, which includes: a static contact plate body, a static contact head, and a rib. The static contact head and the rib protrude from the first surface of the static contact plate body. The static contact head is used to be arranged opposite to the moving contact head. The two opposite ends in the length direction of the rib are the first end and the second end of the rib. The end of the first end of the rib contacts the static contact head, and the end of the second end of the rib is far from the static contact head, so as to lead the arc between the static contact head and the moving contact head along the length direction of the rib to a position far from the static contact head.
[0007] In this static contact plate assembly, a rib is provided on the static contact plate body, which not only improves the strength of the static contact plate body, but also can guide the arc when the static contact head and the moving contact head are separated to generate an arc, avoiding the static contact plate body from deforming and warping under the high temperature of the arc, thereby improving the reliability of the static contact plate body.
[0008] Optionally, the protruding height of the rib with respect to the first surface is less than the protruding height of the static contact with respect to the first surface.
[0009] The protruding height of the rib being less than that of the static contact avoids the rib being too high to hinder the contact between the static contact and the moving contact, resulting in a better on-off effect between the static contact and the moving contact.
[0010] Optionally, the protruding height of the rib with respect to the first surface is less than or equal to two-thirds of the protruding height of the static contact with respect to the first surface.
[0011] When the protruding height of the rib with respect to the first surface is less than or equal to two-thirds of the protruding height of the static contact with respect to the first surface, sufficient space is left for the moving contact to connect with the static contact, ensuring the on-off effect between the static contact and the moving contact.
[0012] Optionally, the width of the rib is greater than or equal to one-fifth of the width of the static contact plate body and less than or equal to two-fifths of the width of the static contact plate body.
[0013] In this embodiment, the width of the rib is set within an appropriate range, ensuring that the rib has sufficient strength while having a relatively small volume for easy processing, and at the same time ensuring its effect of guiding the arc.
[0014] Optionally, the rib is centered with respect to the static contact plate body in the width direction of the rib, and the width direction of the rib is perpendicular to the length direction of the rib.
[0015] The rib being centered with respect to the static contact plate body in its width direction causes the arc to be guided along the center of the static contact plate body when being guided, thereby enhancing the effect of guiding the arc, reducing the influence of the arc on the edge of the static contact plate body, enhancing the ability of the static contact plate body to withstand the arc, and improving the reliability of the static contact plate body.
[0016] Optionally, the rib includes a first rib and a second rib, and the first rib and the second rib are arranged in parallel in the width direction of the rib and are separated by a preset distance.
[0017] Setting both the first rib and the second rib can further improve the strength of the static contact plate body, enhance the effect of guiding the arc, improve the ability of the static contact plate body to withstand the arc, and make the static contact plate assembly more reliable.
[0018] Optionally, the cross-section of the rib is rectangular, arc-shaped or triangular, and the cross-section is perpendicular to the length direction of the rib.
[0019] The cross-section of the rib being in regular shapes such as rectangular, arc-shaped or triangular makes the rib easy to process and at the same time enhances its effect of guiding the arc.
[0020] Optionally, the rib and the static contact plate body are of an integral structure.
[0021] When the rib and the static contact plate body are of an integral structure, the rib is equivalent to being fixed on the static contact plate body, which makes the strengthening effect of the rib on the static contact plate body better and is also convenient for processing.
[0022] According to another aspect of the embodiments of the present application, a circuit breaker is provided. The circuit breaker includes any one of the above-mentioned feasible static contact plate assemblies, and further includes a moving contact plate and an arc extinguishing chamber. A moving contact is provided on the moving contact plate, and the moving contact is arranged opposite to the static contact. At least a part of the arc extinguishing chamber is arranged opposite to the rib, and the air inlet of the arc extinguishing chamber faces the area between the moving contact and the static contact.
[0023] At least a part of the arc extinguishing chamber is arranged opposite to the rib, and the air inlet of the arc extinguishing chamber faces the area between the moving contact and the static contact, which is convenient for the rib to introduce the arc from the air inlet of the arc extinguishing chamber into the arc extinguishing chamber, thereby improving the arc guiding effect of the rib.
[0024] In the static contact plate assembly and the circuit breaker provided by the embodiments of the present application, a static contact and a rib are simultaneously arranged on the first surface of the static contact plate body. The rib improves the strength of the static contact plate body to withstand high temperature and pressure, so that the static contact plate body is less likely to deform under the impact of heat and pressure. Moreover, the first end of the rib contacts the static contact, and the rib plays a role in guiding the arc, making the action of the arc more concentrated on the rib, further improving the durability of the static contact plate body, and thus improving the reliability of the static contact plate body.
[0025] The above description is only an overview of the technical solutions of the embodiments of the present application. In order to be able to understand the technical means of the embodiments of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the embodiments of the present application more obvious and understandable, the following specific embodiments of the present application are specifically given. Brief Description of the Drawings
[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.
[0027] Figure 1 It is a partial structural schematic diagram of a circuit breaker provided with a static contact plate assembly according to an embodiment of the present application.
[0028] Figure 2 It is a structural schematic diagram of the first static contact plate assembly provided by an embodiment of the present application.
[0029] Figure 3 It is a structural schematic diagram of the second static contact plate assembly provided by an embodiment of the present application.
[0030] Figure 4This is a schematic structural diagram of the relative positions of the static contact plate assembly and the arc extinguishing grid in the embodiments of the present application.
[0031] Figure 5 This is a schematic structural diagram of the relative positions of the static contact plate assembly, the moving contact, and the arc extinguishing grid in the embodiments of the present application.
[0032] Reference numerals:
[0033] 10. Static contact plate body; 20. Static contact; 30. Rib; 40. Moving contact plate; 50. Moving contact; 60. Arc extinguishing grid. Detailed implementation manners
[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art without making creative efforts based on the embodiments in the present application belong to the scope of protection of the present application.
[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the description of the present application in the specification are only for the purpose of describing specific embodiments and are not intended to limit the present application.
[0036] The terms "including" and "having" and any variations thereof in the description, claims, and drawings of this application are intended to cover but not exclude other elements. The word "a" or "an" does not exclude the presence of a plurality.
[0037] Referring to "embodiments" herein means that specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase "embodiments" appearing in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.
[0038] The term "and / or" herein is merely a description of the associated relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.
[0039] The orientation terms used in the following description are all the directions shown in the figures, and do not limit the specific structures of the static contact plate assembly and the circuit breaker of the present application. For example, in the description of the present application, terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.
[0040] In addition, expressions indicating directions such as the X direction, the Y direction, and the Z direction for explaining the operations and structures of the components of the static contact plate assembly and the circuit breaker of this embodiment are not absolute but relative. Although these indications are appropriate when the components of the static contact plate assembly and the circuit breaker are in the positions shown in the figures, when these positions change, these directions should have different interpretations to correspond to the changes.
[0041] In addition, terms such as "first", "second", etc. in the specification and claims of the present application or in the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order, and may explicitly or implicitly include one or more of such features.
[0042] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" refers to two or more (including two). Similarly, "a plurality of groups" refers to two or more groups (including two groups).
[0043] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, the "connection" or "coupling" of mechanical structures can refer to a physical connection. For example, a physical connection can be a fixed connection, such as a fixed connection through a fixing member, such as a screw, bolt, or other fixing member; a physical connection can also be a detachable connection, such as a snap connection or a snap-fit connection; a physical connection can also be an integral connection, such as a welded, bonded, or integrally formed connection. The "connection" or "coupling" of circuit structures can refer to not only a physical connection but also an electrical connection or a signal connection. For example, it can be a direct connection, that is, a physical connection, or it can be indirectly connected through at least one intermediate component as long as the circuit is connected, and it can also be the communication inside two components; a signal connection can refer to not only a signal connection through a circuit but also a signal connection through a media medium, such as radio waves. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.
[0044] The static contact plate assembly provided by the first embodiment of the present application is as Figure 1 , Figure 2 and Figure 3 shown. Figure 1 FIG. is a partial structural schematic diagram of a circuit breaker provided with a static contact plate assembly according to an embodiment of the present application. Figure 2 FIG. is a structural schematic diagram of the first static contact plate assembly provided by an embodiment of the present application. Figure 3 FIG. is a structural schematic diagram of the second static contact plate assembly provided by an embodiment of the present application. Among them, this kind of static contact plate assembly includes: a static contact plate body 10, a static contact 20, and a rib 30.
[0045] The static contact plate body 10 is the base component of the static contact plate assembly. The static contact plate body 10 is made of a material with good conductivity, such as copper or copper alloy, etc., to ensure that current can pass smoothly. There are many specific shapes of the static contact plate body 10. For example, it can be set to the different bending shapes as Figure 2 and Figure 3 shown for easy wiring and installation, or it can be set to shapes different from Figure 2 and Figure 3 , which is not limited here.
[0046] Regardless of the shape of the static contact plate body 10, a surface for facing the arc extinguishing grid 60, that is, the first surface, is provided. The first surface is used to set the static contact 20 so that the static contact plate assembly can cooperate with the moving contact 50 and the arc extinguishing grid 60 to control the on-off of the circuit.
[0047] The static contact 20 protrudes and is provided on the first surface of the static contact plate body 10. The shape and size of the static contact 20 are designed according to specific application requirements, such as being set as a circle of a preset size, so as to form a stable and reliable electrical connection with the corresponding moving contact 50. The static contact 20 is usually made of a material with high conductivity and wear resistance, such as silver, etc., to ensure the performance when the static contact 20 and the moving contact make frequent contact and separation.
[0048] As Figure 1 shown, the static contact 20 is used to be arranged opposite to the moving contact 50. The moving contact 50 is arranged on the moving contact plate 40 and moves along with the moving contact plate 40. When the moving contact 50 moves along with the moving contact plate 40 to contact the static contact 20, the circuit breaker closes the circuit, and the current passes through the static contact plate body 10, the static contact 20, the moving contact 50, and the moving contact plate 40 to form a complete current loop, that is, the circuit is closed. When the moving contact 50 moves away from the static contact 20, an arc is generated between the static contact 20 and the moving contact 50 and is elongated. The arc is guided to the arc extinguishing grid 60 in the arc extinguishing chamber to be extinguished, so that the current cannot be conducted from the static contact 20 to the moving contact 50, thereby opening the circuit.
[0049] As Figure 1 , Figure 2 and Figure 3 shown, the rib 30 also protrudes and is provided on the first surface of the static contact plate body 10, and it is arranged in a long strip shape. The main function of the rib 30 is to improve the strength of the static contact plate body 10 and at the same time guide the arc. Its specific structure is that the opposite two ends in the length direction of the rib 30 are the first end and the second end of the rib 30. The end of the first end of the rib 30 contacts the static contact 20, and the end of the second end of the rib 30 is far from the static contact 20, so as to lead the arc between the static contact 20 and the moving contact 50 along the length direction of the rib 30 to a region far from the static contact 20.
[0050] That is to say, the end of the first end of the rib 30 is in close contact with the static contact 20, so that the arc can be quickly captured when the arc is generated. And the end of the second end of the rib 30 is far from the static contact 20, so that a guiding path is formed along the length direction of the rib 30, and the arc can be guided from the first end of the rib 30 to the second end of the rib 30 along the length direction of the rib 30, thereby effectively leading the arc to a region far from the static contact 20 for arc extinguishing operation.
[0051] When the static contact plate body 10 is installed in the circuit breaker, as Figure 1 , Figure 4 and Figure 5 shown, Figure 4 This is a schematic structural diagram of the relative positions of the static contact plate assembly and the arc extinguishing grid involved in the embodiment of the present application. Figure 5This is a schematic diagram of the relative structure among the static contact plate assembly, the moving contact, and the arc extinguishing grid plates involved in the embodiments of this application. Among them, there are multiple arc extinguishing grid plates 60 arranged side by side at intervals. The rib 30 is opposite to the arc extinguishing grid plates 60 and there is a preset distance between the rib 30 and the arc extinguishing grid plates 60. When the static contact 20 and the moving contact 50 are separated, the rib 30 captures the arc and guides the arc from the first end of the rib 30 to the second end during arc blowing. The direction in which this arc is guided and elongated just passes through the air inlet of the arc extinguishing chamber, facilitating the entry of the arc into the arc extinguishing chamber. During the contact process with the arc extinguishing grid plates 60, the arc is cut and its temperature is reduced, achieving the extinguishment of the arc.
[0052] There is an interval between the rib 30 and the arc extinguishing grid plates 60. Specifically, the rib 30 is close to the outermost arc extinguishing grid plate 60, and a preset distance is set between the rib 30 and its nearest arc extinguishing grid plate 60, such that the rib 30 does not contact the arc extinguishing grid plates 60, and the arc extinguishing grid plates 60 do not contact the static contact plate body 10, avoiding the arc extinguishing grid plates 60 generating heat under the long-term load of the current of the static contact plate body 10 and causing an explosion of the arc extinguishing chamber. At the same time, setting a preset distance between the rib 30 and its nearest arc extinguishing grid plate 60 can also enable the arc to be cut by the arc extinguishing grid plate 60 closest to the rib 30, thereby increasing the cutting times of the arc extinguishing grid plates 60 and further improving the arc extinguishing efficiency.
[0053] There are many ways to set the preset distance between the rib 30 and the arc extinguishing grid plates 60. Exemplarily, the preset distance between the rib 30 and the arc extinguishing grid plates 60 can be set such that the minimum distance between the rib 30 and the arc extinguishing grid plates 60 is less than or equal to 1 mm, or set such that the minimum distance between the rib 30 and the arc extinguishing grid plates 60 is greater than or equal to 1 mm and less than or equal to 2 mm. Or, the preset distance between the rib 30 and the arc extinguishing grid plates 60 can also be set to other distances, which are not limited here.
[0054] In this embodiment, the rib 30 itself strengthens the strength of the static contact plate body 10, making the static contact plate body 10 more resistant to high temperature and high pressure. At the same time, during the process of guiding the arc, the rib 30 concentrates and guides the arc, which can reduce the load on the static contact plate body 10 under the action of the arc, further improving the durability of the static contact plate body 10 and the reliability of the static contact plate body 10.
[0055] There are many implementation manners for the specific shape, size, position, etc. of the rib 30, and it can be further set according to requirements so that the cooperation relationship among the rib 30, the static contact plate body 10, and the static contact 20 can adapt to different scenarios. The following is an exemplary description of the specific implementation manners of the rib 30.
[0056] In an implementation manner of further setting the protruding height of the rib 30, it can be as Figure 1 、 Figure 2 and Figure 3As shown, the protruding height of the rib 30 relative to the first surface is made less than the protruding height of the stationary contact 20 relative to the first surface, thereby preventing the rib 30 from being too high and obstructing the contact between the moving contact 50 and the stationary contact 20, ensuring reliable contact between the moving contact 50 and the stationary contact 20, and thus ensuring the on-off effect of the moving contact 50 and the stationary contact 20.
[0057] Furthermore, the protruding height of the rib 30 can be set more precisely. For example, the protruding height of the rib 30 relative to the first surface can be made less than or equal to two-thirds of the protruding height of the stationary contact 20 relative to the first surface, so as to reserve sufficient space for the contact between the moving contact 50 and the stationary contact 20 while enhancing the strength of the stationary contact plate body 10.
[0058] Of course, other regulations can also be made for the height of the rib 30 according to requirements. For example, the protruding height of the rib 30 relative to the first surface can be made less than or equal to one-half of the protruding height of the stationary contact 20 relative to the first surface. Or, the protruding height of the rib 30 relative to the first surface can be made greater than or equal to one-half of the protruding height of the stationary contact 20 relative to the first surface, and at the same time, the protruding height of the rib 30 relative to the first surface can be made less than or equal to two-thirds of the protruding height of the stationary contact 20 relative to the first surface.
[0059] In an embodiment where the width of the rib 30 is further set, the width of the rib 30 can be made greater than or equal to one-fifth of the width of the stationary contact plate body 10 and less than or equal to two-fifths of the width of the stationary contact plate body 10, so as to ensure that the rib 30 has sufficient strength while making the volume of the rib 30 smaller, facilitating processing, and ensuring its effect of guiding the arc.
[0060] Of course, in other embodiments, other regulations can also be made for the width of the rib 30 according to requirements. For example, the width of the rib 30 can be made greater than or equal to one-fifth of the width of the stationary contact plate body 10 and less than or equal to two-fifths of the width of the stationary contact plate body 10, etc., which are not limited here.
[0061] In an embodiment where the position of the rib 30 is further set, the rib 30 can be centered relative to the stationary contact plate body 10 in the width direction of the rib 30, and the width direction of the rib 30 is perpendicular to the length direction of the rib 30, so that when the arc is guided, it can be guided along the center of the stationary contact plate body 10, reducing the influence of the arc on the edge of the stationary contact plate body 10, enhancing the ability of the stationary contact plate body 10 to withstand the high temperature and high pressure of the arc, and improving the reliability of the stationary contact plate body 10.
[0062] In addition, in this embodiment, the rib 30 can be provided as one or multiple. For example, the rib 30 includes a first rib and a second rib, and the first rib and the second rib are arranged in parallel in the width direction of the rib 30 and are separated by a preset distance, so as to further improve the strength increase of the static contact plate body 10, enhance the effect of guiding the arc at the same time, improve the ability of the static contact plate body 10 to withstand the arc, and make the static contact plate assembly more reliable.
[0063] In this embodiment, the rib 30 can be an integral structure with the static contact plate body 10, and can be specifically processed by stamping or other means to ensure the strengthening effect of the rib 30 on the static contact plate body 10, and simplify the processing method of the rib 30 at the same time. Of course, the rib 30 can also be processed by other means, such as by welding, casting, etc., which are not limited herein.
[0064] There are also many setting methods for the shape of the rib 30. For example, the cross-section of the rib 30 can be a regular shape such as a rectangle, an arc or a triangle, and the cross-section is perpendicular to the length direction of the rib 30, so as to facilitate the processing of the rib 30 and enhance the effect of guiding the arc at the same time. Of course, the rib 30 can also be set as other special-shaped structures to achieve other effects to meet special requirements, which are not limited herein.
[0065] The static contact 20 can be protrudingly arranged on the first surface of the static contact plate body 10 by welding or other means, and the static contact 20 should be arranged corresponding to the rib 30. When the rib 30 and the static contact 20 are arranged on the first surface of the static contact plate body 10, the rib 30 can be processed first, and then the welding position of the static contact 20 can be positioned based on the end of the first end of the rib 30, and then the static contact 20 can be welded on the first surface of the static contact plate body 10 to ensure the processing accuracy.
[0066] The above first embodiment details the static contact plate assembly. The following second embodiment introduces a circuit breaker including the static contact plate assembly of the above first embodiment, which is specifically as follows.
[0067] As Figure 1 shown, the circuit breaker includes the static contact plate assembly provided by the first embodiment, and further includes a moving contact plate 40 and an arc extinguishing chamber. A moving contact 50 is provided on the moving contact plate 40, the moving contact 50 is arranged opposite to the static contact 20, at least part of the arc extinguishing chamber is arranged opposite to the rib 30, and the air inlet of the arc extinguishing chamber faces the area between the moving contact 50 and the static contact 20.
[0068] The arc extinguishing chamber is composed of a plurality of arc extinguishing grid pieces 60 arranged at intervals, and the arrangement direction of each arc extinguishing grid piece 60 is the same as the relative direction of the moving contact 50 and the static contact 20, so as to divide the arc into multiple segments and each arc extinguishing grid piece 60 cools and extinguishes the arc by contacting the arc.
[0069] The air inlet of the arc extinguishing chamber is the entrance for the arc to enter the arc extinguishing chamber. The air inlet faces the area between the moving contact 50 and the static contact 20, so that when the arc is guided and elongated, it just passes through the air inlet and enters the arc extinguishing chamber.
[0070] The rib 30 is adjacent to the outermost arc extinguishing grid plates 60, and the direction from the first end to the second end of the rib 30 is from the static contact 20 to the air inlet of the arc extinguishing chamber, so as to facilitate the rib 30 to introduce the arc from the air inlet of the arc extinguishing chamber into the arc extinguishing chamber, thereby improving the arc guiding effect of the rib 30.
[0071] The rib 30 does not contact any of the arc extinguishing grid plates 60. Specifically, the rib 30 is separated from the nearest arc extinguishing grid plate 60 by a preset distance, which can be the minimum distance between the rib 30 and the arc extinguishing grid plate 60. The specific setting method is as described in the relevant content of the foregoing embodiments, and no redundant description will be made here.
[0072] There is a gap between the rib 30 and the arc extinguishing grid plates 60, so that the arc extinguishing grid plates 60 do not contact the static contact plate body 10, preventing the arc extinguishing grid plates 60 from generating heat under the long-term load of the current of the static contact plate body 10 and causing an explosion of the arc extinguishing chamber. At the same time, setting a preset distance between the rib 30 and the nearest arc extinguishing grid plate 60 can also enable the arc to be cut by the arc extinguishing grid plate 60 closest to the rib 30, thereby ensuring the cutting times and arc extinguishing efficiency of the arc extinguishing grid plates 60 and ensuring the arc extinguishing effect.
[0073] In addition, in this circuit breaker, there can be multiple groups of static contact plate assemblies to control the on-off of multiple parallel circuits simultaneously, which is not limited here.
[0074] The specific structure of the static contact plate assembly in this circuit breaker corresponds to the static contact plate assembly in the foregoing embodiments. For the specific structure setting method, please refer to the relevant introduction of the static contact plate assembly in any of the embodiments related to the static contact plate assembly. The similarities will not be elaborated in this embodiment.
[0075] In summary, in the above-described static contact plate assembly and circuit breaker, a static contact and a rib are simultaneously provided on the first surface of the static contact plate body. The rib improves the strength of the static contact plate body to withstand high temperature and pressure, making the static contact plate body less likely to deform under the impact of heat and pressure. Moreover, the end of the first end of the rib contacts the static contact, and the rib plays a role in guiding the arc, making the action of the arc more concentrated on the rib, further improving the durability of the static contact plate body and thus the reliability of the static contact plate body.
[0076] Those skilled in the art can understand that although some embodiments herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments means that it is within the scope of this application and forms different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.
[0077] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.
Claims
1. A static contact plate assembly, characterized in that, The static contact plate assembly includes: a static contact plate body, static contacts, and ribs; the static contacts and the ribs protrude from a first surface of the static contact plate body; the static contacts are arranged opposite to moving contacts. Opposite ends in the length direction of the rib are a first end and a second end of the rib; the end of the first end of the rib contacts the static contact, and the end of the second end of the rib is away from the static contact, so as to lead the arc between the static contact and the moving contact along the length direction of the rib away from the static contact.
2. The static contact plate assembly according to claim 1, characterized in that, The protruding height of the rib relative to the first surface is less than the protruding height of the static contact relative to the first surface.
3. The static contact plate assembly according to claim 2, wherein, The protruding height of the rib relative to the first surface is less than or equal to two-thirds of the protruding height of the static contact relative to the first surface.
4. The static contact plate assembly according to claim 1, characterized in that The width of the rib is greater than or equal to one-fifth of the width of the static contact plate body and less than or equal to two-fifths of the width of the static contact plate body.
5. The static contact plate assembly according to claim 1, wherein, The rib is centered relative to the static contact plate body in the width direction of the rib, and the width direction of the rib is perpendicular to the length direction of the rib.
6. The static contact plate assembly according to claim 5, characterized in that, The rib includes a first rib and a second rib, and the first rib and the second rib are arranged in parallel and spaced apart by a preset distance in the width direction of the rib.
7. The static contact plate assembly according to claim 1, wherein The cross-section of the rib is rectangular, arc-shaped or triangular, and the cross-section is perpendicular to the length direction of the rib.
8. The static contact plate assembly according to claim 1, wherein, The rib and the static contact plate body are of an integral structure.
9. A circuit breaker, characterized in that, The circuit breaker includes the static contact plate assembly according to any one of claims 1-8, and further includes a moving contact plate and an arc extinguishing chamber. The moving contact plate is provided with moving contacts, and the moving contacts are arranged opposite to the static contacts. At least part of the arc extinguishing chamber is arranged opposite to the rib, and the air inlet of the arc extinguishing chamber faces the area between the moving contact and the static contact.