Arc extinguishing mechanism and circuit breaker

Abstract

The utility model provides an arc extinguishing mechanism and a circuit breaker, and belongs to the technical field of electrical equipment. The arc extinguishing mechanism provided by the utility model comprises an arc extinguishing chamber, a magnet yoke, a static contact and a magnetic conductive structure. The magnet yoke is arranged on one side of the arc extinguish chamber, and a non-zero included angle is formed between the magnet yoke and the arc extinguish chamber. The static contact comprises a first segment and a second segment which are connected with each other, a non-zero included angle is formed between the first segment and the second segment, and at least part of the first segment is located in the magnet yoke. The arc extinguish chamber, the magnet yoke and the second segment define an installation space. The magnetic conductive structure is arranged in the installation space and is used for increasing a magnetic field in the circuit breaker. The installation space is defined by the arc extinguish chamber, the magnet yoke and the second section, the magnetic conduction structure is placed in the installation space, the magnetic field in the circuit breaker can be increased or guided by means of the characteristics of the magnetic conduction structure, and therefore the purpose of improving the efficiency of transferring electric arcs into the arc extinguish chamber is achieved; therefore, the electric arc can be extinguished more quickly.

Description

Technical Field

[0001] The present application relates to the technical field of electrical equipment, and particularly to an arc extinguishing mechanism and a circuit breaker. Background Art

[0002] A circuit breaker is an important switching device in a power mechanism, capable of closing, carrying, and interrupting the current in a circuit. When faults such as leakage, overload, or short circuit occur in the circuit connected to the circuit breaker, the circuit breaker can cut off the circuit by tripping to prevent the expansion of the fault. An arc is generated when the circuit breaker trips. Usually, the arc is transferred to the arc extinguishing chamber of the circuit breaker, and then the arc is extinguished in the arc extinguishing chamber.

[0003] However, in the related art, the efficiency of transferring the arc to the arc extinguishing chamber is relatively low, resulting in the arc not being extinguished in a timely and rapid manner. Utility Model Content

[0004] The present application provides an arc extinguishing mechanism and a circuit breaker to improve the arc extinguishing effect of the circuit breaker.

[0005] In a first aspect, the present application provides an arc extinguishing mechanism applied to a circuit breaker. The arc extinguishing mechanism includes: an arc extinguishing chamber, a magnetic yoke, a static contact, and a magnetic conduction structure. The magnetic yoke is provided on one side of the arc extinguishing chamber, and there is a non-zero included angle between the magnetic yoke and the arc extinguishing chamber. The static contact includes a first segment and a second segment connected to each other. There is a non-zero included angle between the first segment and the second segment, and at least a part of the first segment is located within the magnetic yoke. The arc extinguishing chamber, the magnetic yoke, and the second segment enclose an installation space. The magnetic conduction structure is provided in the installation space, and the magnetic conduction structure is used to increase the magnetic field inside the circuit breaker.

[0006] Through the above solution, there is a non-zero included angle between the magnetic yoke and the arc extinguishing chamber, and there is a non-zero included angle between the first segment and the second segment, and the first segment and the second segment are connected to each other. In this way, the arc extinguishing chamber, the magnetic yoke, and the second segment enclose an installation space inside the circuit breaker. A magnetic conduction structure can be placed in this installation space. By adjusting the included angle between the magnetic yoke and the arc extinguishing chamber, and / or by adjusting the included angle between the first segment and the second segment, the size of the installation space can be adjusted. Therefore, the present application can adjust the installation space to be larger according to the internal space of the circuit breaker, so as to facilitate placing a relatively large magnetic conduction structure in this installation space.

[0007] When the placed magnetic conduction structure is relatively large, the magnetic conduction structure can preferably concentrate or guide the magnetic field inside the circuit breaker, so as to achieve the purpose of improving the efficiency of transferring the arc into the arc extinguishing chamber. When the efficiency of transferring the arc into the arc extinguishing chamber increases, the arc can be extinguished more quickly.

[0008] In a possible design, the magnetic conduction structure can fill the installation space.

[0009] Through the above solution, when the magnetic conductive structure fills the installation space, not only can the utilization rate of the installation space be maximized, but also the magnetic conductive structure can be installed in the installation space with the largest installation volume. The larger the volume of the magnetic conductive structure, the better the concentration and guidance effect on the magnetic field inside the circuit breaker, the higher the efficiency of the arc transfer to the arc extinguishing chamber, and the faster the arc can be extinguished.

[0010] In a possible design, the magnetic conductive structure is a triangular prism, and includes a first side wall, a second side wall and a third side wall connected end to end. The first side wall is parallel to the yoke, the second side wall is parallel to the second segment, and the third side wall is parallel to the arc extinguishing chamber.

[0011] Through the above scheme, when the first side wall is parallel to the yoke, the angle between the first side wall and the arc extinguishing chamber can be the same as the angle between the yoke and the arc extinguishing chamber, and when the second side wall is parallel to the second segment, the angle between the second side wall and the first segment can be the same as the angle between the second segment and the first segment. When the third side wall is parallel to the arc extinguishing chamber, the angle between the third side wall and the first side wall can be the same as the angle between the yoke and the arc extinguishing chamber. In this way, the cross-section of the triangular prism-shaped magnetic conductive structure in the installation direction can be roughly the same as the shape of the installation space, so that the magnetic conductive structure can be more easily placed in the installation space.

[0012] In a possible design, the magnetic conductive structure includes a plurality of magnetic conductive sheets, and the plurality of magnetic conductive sheets are arranged in close contact with each other.

[0013] Through the above scheme, the form of the magnetic conductive structure formed by multiple magnetic conductive sheets can increase or decrease the number of magnetic conductive sheets according to actual use requirements, so as to increase the flexibility of the use of the magnetic conductive structure. When multiple magnetic conductive sheets are arranged in close contact with each other, the effect will be better when the magnetic conductive structure concentrates or guides the magnetic field inside the circuit breaker, thereby effectively improving the efficiency of the arc transfer to the arc extinguishing chamber.

[0014] In a possible design, the circuit breaker includes a top cover, and a plurality of magnetic conductive sheets are riveted to each other. The magnetic conductive sheets are provided with riveted bosses, which are arranged toward the top cover. A limiting groove is provided on one side of the top cover facing the magnetic conductive sheets, and the riveted boss is located in the limiting groove.

[0015] Through the above scheme, riveting has the advantages of high strength and easy disassembly. Multiple magnetic conductive sheets are riveted to form a magnetic conductive structure, which can increase the overall strength of the magnetic conductive structure. In addition, when a certain magnetic conductive sheet is worn or damaged, it can be easily replaced or repaired. Because multiple magnetic conductive sheets are riveted, riveted bosses will be generated on the surface of the magnetic conductive sheets. A limit groove is set on the side of the top cover facing the magnetic conductive sheet. The limit groove can be used to limit the movement of the magnetic conductive structure, thereby reducing the probability of the magnetic conductive structure shaking inside the circuit breaker and increasing the reliability of the arc extinguishing mechanism.

[0016] In a possible design, the circuit breaker further includes a base. The arc extinguishing chamber, the magnetic yoke, the static contact, and the magnetic conduction structure are all arranged inside the base.

[0017] Through the above solution, the base can provide an installation space for the arc extinguishing chamber, the magnetic yoke, the static contact, and the magnetic conduction structure. Moreover, after the arc extinguishing chamber, the magnetic yoke, the static contact, and the magnetic conduction structure are installed inside the base, the base can also provide a protection function for them, increasing the reliability of use of the arc extinguishing chamber, the magnetic yoke, the static contact, and the magnetic conduction structure.

[0018] In a possible design, the base includes a limiting plate. Part of the magnetic yoke abuts against the limiting plate, and one side of the magnetic conduction structure away from the second segment abuts against the limiting plate.

[0019] Through the above solution, by arranging the limiting plate inside the base, when the limiting plate abuts against part of the magnetic yoke, the limiting plate can support the magnetic yoke. When the limiting plate abuts against one side of the magnetic conduction structure away from the second segment, the limiting plate can limit the magnetic conduction structure. In this way, the limiting plate can achieve the effect of multiplexing. Moreover, since the magnetic conduction structure is only placed inside the base, arranging the limiting plate can reduce the possibility of the magnetic conduction structure shaking or displacing inside the base, increasing the reliability of use of the magnetic conduction structure, and thus increasing the reliability of use of the arc extinguishing mechanism.

[0020] In a possible design, the base further includes a limiting post. The limiting post is arranged on one side of the limiting plate, and the installation space is located between the limiting plate and the limiting post. One side of the magnetic conduction structure close to the second segment abuts against the limiting post.

[0021] Through the above solution, the limiting post is arranged on one side of the limiting plate, and the installation space is located between the limiting plate and the limiting post. After the magnetic conduction structure is placed in the installation space, one end of the magnetic conduction structure away from the second segment can be limited by the limiting plate, and one end of the magnetic conduction structure close to the second segment can be limited by the limiting post. In this way, in the arrangement direction of the limiting plate and the limiting post, the displacement of the magnetic conduction component in the installation space is limited, reducing the possibility of the magnetic conduction component moving along the installation direction of the limiting plate and the limiting post, increasing the reliability of use of the magnetic conduction structure, and thus increasing the reliability of use of the arc extinguishing mechanism.

[0022] In a possible design, a relief groove is provided on one side of the magnetic conduction structure close to the second segment. The limiting post abuts against the groove wall of the relief groove.

[0023] With the above solution, when the side of the magnetic conduction structure close to the second segment abuts against the limiting post, the limiting post can abut against the wall of the relief groove provided on the side of the magnetic conduction structure close to the second segment. In this way, interference between the arrangement of the magnetic conduction structure and the limiting post can be avoided, reducing the possibility that the magnetic conduction structure cannot be placed in the installation space and increasing the reliability of the arc extinguishing mechanism.

[0024] In a second aspect, the present application provides a circuit breaker, including a top cover, a base, and the arc extinguishing mechanism mentioned in the first aspect above. After the top cover and the base are covered, a receiving cavity is formed. The arc extinguishing chamber, the yoke, the static contact, and the magnetic conduction structure are all arranged in the receiving cavity.

[0025] With the above solution, when an arc is generated during the breaking process of the circuit breaker mentioned in the present application, the arc extinguishing mechanism can be used to limit the spatial position of the generated arc and accelerate the extinction of the arc. Setting the yoke can improve the operating efficiency of the tripping mechanism in the circuit breaker. In this way, when abnormal conditions such as overload or short circuit occur in the external circuit, the current can be quickly and automatically cut off. The arc extinguishing mechanism mentioned in the present application can improve the efficiency of arc transfer to the arc extinguishing chamber by increasing the volume of the magnetic conduction structure, so that the arc can be quickly extinguished. Therefore, the circuit breaker including the arc extinguishing mechanism mentioned in the present application can also achieve the same effect.

[0026] For the circuit breaker provided in the second aspect above, the beneficial effects can refer to the beneficial effects brought by the first aspect and various possible implementation manners of the first aspect, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the circuit breaker provided by the embodiment of the present application.

[0028] Figure 2 It is a schematic diagram of the base in the embodiment of the present application without the magnetic conduction structure installed.

[0029] Figure 3 It is a schematic diagram of the overall structure of the arc extinguishing mechanism provided by the embodiment of the present application.

[0030] Figure 4 It is a schematic diagram of the overall structure of the static contact provided by the embodiment of the present application.

[0031] Figure 5 It is a schematic diagram of the base in the embodiment of the present application with the magnetic conduction structure installed.

[0032] Figure 6 It is a schematic diagram of the magnetic conduction structure in a perspective view provided by the embodiment of the present application.

[0033] Figure 7 It is a schematic diagram of the magnetic conduction structure in another perspective view provided by the embodiment of the present application.

[0034] Figure 8 This is an exploded view of the magnetic conduction structure provided by the embodiment of the present application.

[0035] Figure 9 This is a schematic diagram of the internal structure of the top cover provided by the embodiment of the present application.

[0036] Figure 10 This is an exploded view of the circuit breaker provided by the embodiment of the present application.

[0037] Description of the reference numerals:

[0038] 100, arc extinguishing chamber;

[0039] 200, magnetic yoke;

[0040] 300, static contact; 310, first segment; 320, second segment;

[0041] 400, installation space;

[0042] 500, magnetic conduction structure; 510, first side wall; 520, second side wall; 530, third side wall; 540, magnetic conduction sheet; 541, riveting boss; 550, relief groove;

[0043] 600, top cover; 610, limiting groove;

[0044] 700, base; 710, limiting plate; 720, limiting post. Detailed implementation manners

[0045] 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 based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0046] 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 this application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0047] 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.

[0048] References to "embodiments" in this specification mean 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 "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0049] As used herein, the term "and / or" merely describes an association relationship between associated objects and indicates that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0050] All directional terms used in the following description are the directions shown in the figures and do not limit the specific structure of the static contact of a circuit breaker and the circuit breaker of the present application. For example, in the description of the present application, terms such as "center", "longitudinal", "lateral", "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. This is 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 of the present application.

[0051] In addition, terms such as "first", "second", etc. in the description, claims, or the above-mentioned drawings of the present application are used to distinguish different objects and not to describe a specific order, and may explicitly or implicitly include one or more of such features.

[0052] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, "connected" or "coupled" in a mechanical structure may refer to a physical connection. For example, a physical connection may 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 may also be a detachable connection, such as a snap connection or a snap-fit connection; a physical connection may also be an integral connection, such as a welded, bonded, or integrally formed connection. 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.

[0053] To enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0054] Figure 1 It is a schematic diagram of the overall structure of the circuit breaker provided in the embodiment of this application. Figure 2 It is a schematic diagram of the base without a magnetic conduction structure installed in the embodiment of this application. Figure 3 It is a schematic diagram of the overall structure of the arc extinguishing mechanism provided in the embodiment of this application. As Figures 1 to 3 shown, this application provides a circuit breaker, including a top cover 600, a base 700, and an arc extinguishing mechanism. After the top cover 600 and the base 700 are covered, an accommodation cavity is formed. The arc extinguishing chamber 100, the magnetic yoke 200, the static contact 300, and the magnetic conduction structure 500 are all arranged in the accommodation cavity.

[0055] The cooperation between the top cover 600 and the base 700 can protect the arc extinguishing chamber 100, the magnetic yoke 200, the static contact 300, and the magnetic conduction structure 500 arranged in the accommodation cavity. The arc extinguishing chamber 100, the magnetic yoke 200, and the static contact 300 can all be fixed in the base 700, and the magnetic conduction structure 500 can be placed in the base 700, and then the top cover 600 and the base 700 cooperate together to limit it.

[0056] The circuit breaker further includes a tripping mechanism. The main function of the tripping mechanism is to quickly and automatically cut off the current when abnormal conditions such as overload or short circuit occur in the external circuit, so as to protect the circuit and electrical equipment from damage. When the tripping mechanism operates and cuts off the main circuit current, an arc will be generated inside the circuit breaker.

[0057] The arc extinguishing chamber 100 includes a plurality of arc extinguishing grid sheets, and the plurality of arc extinguishing grid sheets can be arranged at equal intervals in the arc extinguishing chamber 100. When an arc is generated inside the circuit breaker, the plurality of arc extinguishing grid sheets can cut the generated arc into multiple small arcs to achieve the effect of quickly extinguishing the arc.

[0058] In summary, when an arc is generated during the breaking process of the circuit breaker mentioned in this application, the arc extinguishing mechanism can be used to limit the spatial position of the generated arc and accelerate the extinguishing of the arc. Setting the magnetic yoke 200 can improve the operating efficiency of the tripping mechanism inside the circuit breaker. In this way, when abnormal conditions such as overload or short circuit occur in the external circuit, the current can be quickly and automatically cut off. The arc extinguishing mechanism mentioned in this application can improve the efficiency of the arc transferring to the arc extinguishing chamber 100 by increasing the volume of the magnetic conduction structure 500, so that the arc can be quickly extinguished. Therefore, the circuit breaker including the arc extinguishing mechanism mentioned in this application can also achieve the same effect.

[0059] The arc extinguishing mechanism mentioned in this application will be specifically described below with reference to the accompanying drawings.

[0060] Figure 4 This is a schematic diagram of the overall structure of the static contact provided by the embodiment of the present application.

[0061] As Figures 2 to 4 shown, the present application provides an arc extinguishing mechanism, which includes: an arc extinguishing chamber 100, a yoke 200, a static contact 300, and a magnetic conduction structure 500. The yoke 200 is arranged on one side of the arc extinguishing chamber 100, and there is a non-zero angle between the yoke 200 and the arc extinguishing chamber 100. The static contact 300 includes a first segment 310 and a second segment 320 connected to each other, and there is a non-zero angle between the first segment 310 and the second segment 320, and at least part of the first segment 310 is located inside the yoke 200. The arc extinguishing chamber 100, the yoke 200, and the second segment 320 enclose an installation space 400. The magnetic conduction structure 500 is arranged in the installation space 400, and the magnetic conduction structure 500 is used to increase the magnetic field inside the circuit breaker.

[0062] The yoke 200 can be a prism structure, and the yoke 200 includes an upper side and a lower side that are opposite to each other. The arc extinguishing chamber 100 can include an upper side and a lower side that are opposite to each other. The upper side of the arc extinguishing chamber 200 is close to the lower side of the yoke 200, and the lower side of the arc extinguishing chamber 200 is close to the inner wall of the base 700. The angle between the lower side of the yoke 200 and the upper side of the arc extinguishing chamber 100 can be 30°, 45°, 60°, etc.

[0063] The first segment 310 can be arranged parallel to the upper side or the lower side of the yoke 200. There is a gap inside the yoke 200, so that there is an installation cavity inside the yoke 200, and part of the first segment 310 can be attached to the inner wall of the installation cavity, or part of the first segment 310 can not be attached to the inner wall of the installation cavity. The static silver point of the circuit breaker can be arranged on the side of the second segment 320 facing away from the yoke 200. The angle between the first segment 310 and the second segment 320 can be 90°, 115°, 120°, etc.

[0064] The arc extinguishing chamber 100, the yoke 200, and the second segment 320 can enclose a triangular installation space 400. The size of the installation space formed by enclosing the arc extinguishing chamber 100, the yoke 200, and the second segment 320 can be adjusted by adjusting the angle between the yoke 200 and the arc extinguishing chamber 100, and / or by adjusting the angle between the first segment 310 and the second segment 320.

[0065] The magnetic conductive structure 500 can make the arc expand and cool rapidly by means of concentrating the magnetic field and guiding the magnetic field, etc., so as to achieve more effective arc extinguishing. The magnetic conductive structure 500 can be placed in the installation space 400 formed by enclosing the arc extinguishing chamber 100, the yoke 200 and the second segment 320. And the size of the magnetic conductive structure 500 can be adjusted according to the size of the installation space 400. For example, when the installation space 400 is relatively large, a magnetic conductive structure 500 with a relatively large volume can be placed in the installation space 400. When the installation space 400 is relatively small, a magnetic conductive structure 500 with a slightly smaller volume can be placed in the installation space 400.

[0066] In summary, there is a non-zero angle between the yoke 200 and the arc extinguishing chamber 100, a non-zero angle between the first segment 310 and the second segment 320, and the first segment 310 and the second segment 320 are connected to each other. In this way, the arc extinguishing chamber 100, the yoke 200 and the second segment 320 enclose the installation space 400 inside the circuit breaker. The magnetic conductive structure 500 can be placed in the installation space 400. By adjusting the angle between the yoke 200 and the arc extinguishing chamber 100, and / or by adjusting the angle between the first segment 310 and the second segment 320, the size of the installation space 400 can be adjusted. Therefore, in the present application, the installation space 400 can be adjusted to be relatively large according to the internal space of the circuit breaker, so as to facilitate placing a magnetic conductive structure 500 with a relatively large volume in the installation space 400.

[0067] When the volume of the placed magnetic conductive structure 500 is relatively large, the magnetic conductive structure 500 can better concentrate the magnetic field inside the circuit breaker or guide the magnetic field inside the circuit breaker, so as to achieve the purpose of improving the transfer efficiency of the arc into the arc extinguishing chamber 100. When the transfer efficiency of the arc into the arc extinguishing chamber 100 increases, the arc can be extinguished faster.

[0068] Figure 5 It is a schematic diagram of installing a magnetic conductive structure in the base provided by the embodiment of the present application. As Figure 1 and Figure 5 shown, the magnetic conductive structure 500 can fill the installation space 400.

[0069] The magnetic conductive structure can be installed in the installation space along the direction from the top cover 600 to the base 700. The area of the cross-section of the magnetic conductive structure 500 in the installation direction can be the same as the area of the installation space 400, or the area of the cross-section of the magnetic conductive structure 500 in the installation direction can be slightly smaller than the area of the installation space 400.

[0070] In summary, when the magnetic conduction structure 500 fills the installation space 400, not only can the utilization rate of the installation space 400 be maximized, but also the magnetic conduction structure 500 can be installed in the installation space 400 with the largest volume. The larger the volume of the magnetic conduction structure 500, the better the concentration effect and guiding effect on the internal magnetic field of the circuit breaker, the higher the efficiency of the arc transfer into the arc extinguishing chamber 100, and the faster the arc can be extinguished.

[0071] Figure 6 FIG. 4 is a schematic structural view of the magnetic conduction structure provided by an embodiment of the present application from a perspective. Figure 7 FIG. 5 is a schematic structural view of the magnetic conduction structure provided by an embodiment of the present application from another perspective. As Figure 2 、 Figures 5 to 7 shown, the magnetic conduction structure 500 is a triangular prism type, and the magnetic conduction structure 500 includes a first side wall 510, a second side wall 520, and a third side wall 530 that are connected end to end. The first side wall 510 is parallel to the magnetic yoke 200, the second side wall 520 is parallel to the second segment 320, and the third side wall 530 is parallel to the arc extinguishing chamber 100.

[0072] The cross-section of the magnetic conduction structure 500 in the installation direction can be a triangle. The first side wall 510, the second side wall 520, and the third side wall 530 can be three side surfaces of the triangular prism.

[0073] Because there is a non-zero angle between the magnetic yoke 200 and the arc extinguishing chamber 100, there is a non-zero angle between the first segment 310 and the second segment 320, and the first segment 310 and the second segment 320 are connected to each other, the installation space 400 formed by enclosing the arc extinguishing chamber 100, the magnetic yoke 200, and the second segment 320 can be approximately triangular. When the magnetic conduction structure 500 is a triangular prism type, it can be more easily placed in the installation space 400.

[0074] In summary, when the first side wall 510 is parallel to the magnetic yoke 200, the angle between the first side wall 510 and the arc extinguishing chamber 100 can be the same as the angle between the magnetic yoke 200 and the arc extinguishing chamber 100. When the second side wall 520 is parallel to the second segment 320, the angle between the second side wall 520 and the first segment 310 can be the same as the angle between the second segment 320 and the first segment 310. When the third side wall 530 is parallel to the arc extinguishing chamber 100, the angle between the third side wall 530 and the first side wall 510 can be the same as the angle between the magnetic yoke 200 and the arc extinguishing chamber 100. In this way, the cross-sectional shape of the triangular prism-shaped magnetic conduction structure 500 in the installation direction can be approximately the same as the shape of the installation space 400, so that the magnetic conduction structure 500 can be more easily placed into the installation space 400.

[0075] Figure 8 FIG. 6 is an exploded view of the magnetic conduction structure provided by an embodiment of the present application. AsFigure 8 As shown, the magnetic conduction structure 500 includes a plurality of magnetic conduction sheets 540. The plurality of magnetic conduction sheets 540 are arranged in contact with each other.

[0076] The materials of the plurality of magnetic conduction sheets 540 can be the same, and the shapes of the plurality of magnetic conduction sheets 540 can also be the same. The plurality of magnetic conduction sheets 540 can be arranged in contact with each other by means of snap connection or adhesion.

[0077] In summary, by using the form of the magnetic conduction structure 500 composed of a plurality of magnetic conduction sheets 540, the number of magnetic conduction sheets 540 can be increased or decreased according to actual usage requirements, which can increase the flexibility of use of the magnetic conduction structure 500. When the plurality of magnetic conduction sheets 540 are arranged in contact with each other, the effect will be better when the magnetic conduction structure 500 concentrates or guides the internal magnetic field of the circuit breaker, thereby effectively improving the efficiency of the arc transfer into the arc extinguishing chamber 100.

[0078] Figure 9 It is a schematic diagram of the internal structure of the top cover provided by the embodiment of the present application. As Figure 2 、 Figure 8 and Figure 9 shown, the circuit breaker includes a top cover 600, and a plurality of magnetic conduction sheets 540 are riveted to each other. The magnetic conduction sheet 540 is provided with a riveting boss 541, and the riveting boss 541 faces the top cover 600. A limiting groove 610 is provided on the side of the top cover 600 facing the magnetic conduction sheet 540, and the riveting boss 541 is located in the limiting groove 610.

[0079] When the plurality of magnetic conduction sheets 540 are riveted to each other, riveting bosses 541 will be formed on the surfaces of the plurality of magnetic conduction sheets 540. Because the number of magnetic conduction sheets 540 can be increased or decreased according to actual needs, the surface of the outermost magnetic conduction sheet 540 is not leveled. In this way, when the magnetic conduction structure 500 is placed in the base 700, the magnetic conduction sheet 540 on the side facing the top cover 600 has a riveting boss 541.

[0080] The limiting groove 610 can be a blind groove provided on the side of the top cover 600 facing the base 700. The limiting groove 610 can be directly opened on the top cover 600, or the limiting groove 610 can be composed of two rib structures provided on the base 700.

[0081] After the magnetic conduction structure 500 is placed in the installation space 400, the top cover 600 is covered on the base 700. At this time, the groove wall of the limiting groove 610 can be in contact with the side wall of the riveting boss 541, so as to limit the magnetic conduction structure 500 by using the limiting groove 610.

[0082] In summary, riveting has advantages such as high strength and easy disassembly. Multiple magnetic conduction sheets 540 form a magnetic conduction structure 500 through riveting, which can increase the overall strength of the magnetic conduction structure 500. Moreover, when a certain magnetic conduction sheet 540 is worn or damaged, it is also convenient for replacement or repair. Since multiple magnetic conduction sheets 540 are riveted together, riveting bosses 541 will be generated on the surface of the magnetic conduction sheets 540. By providing a limiting groove 610 on the side of the top cover 600 facing the magnetic conduction sheets 540, the movement of the magnetic conduction structure 500 can be limited by the limiting groove 610, reducing the probability of the magnetic conduction structure 500 shaking inside the circuit breaker and increasing the reliability of the arc extinguishing mechanism.

[0083] As Figure 2 and Figure 5 shown, the circuit breaker further includes a base 700. The arc extinguishing chamber 100, the magnetic yoke 200, the static contact 300, and the magnetic conduction structure 500 are all arranged inside the base 700.

[0084] How the arc extinguishing chamber 100, the magnetic yoke 200, the static contact 300, and the magnetic conduction structure 500 are arranged inside the base 700 has been described above and will not be elaborated here.

[0085] Through the above arrangement, the base 700 can provide an installation space 400 for the arc extinguishing chamber 100, the magnetic yoke 200, the static contact 300, and the magnetic conduction structure 500. Moreover, after the arc extinguishing chamber 100, the magnetic yoke 200, the static contact 300, and the magnetic conduction structure 500 are installed inside the base 700, the base 700 can also provide a protection function for the arc extinguishing chamber 100, the magnetic yoke 200, the static contact 300, and the magnetic conduction structure 500, increasing the reliability of use of the arc extinguishing chamber 100, the magnetic yoke 200, the static contact 300, and the magnetic conduction structure 500.

[0086] Figure 10 This is an exploded view of the circuit breaker provided by the embodiment of the present application. As Figure 5 and Figure 10 shown, the base 700 includes a limiting plate 710. Part of the magnetic yoke 200 abuts against the limiting plate 710, and the side of the magnetic conduction structure 500 away from the second segment 320 abuts against the limiting plate 710.

[0087] The limiting plate 710 can be a plate-like structure provided in the direction of the top cover 600 of the base 700. The limiting plate 710 can abut against part of the magnetic yoke 200, so that the limiting plate 710 can support the magnetic yoke 200.

[0088] Since there is a non-zero angle between the magnetic yoke 200 and the arc extinguishing chamber 100, one side of the magnetic yoke 200 can be closer to the arc extinguishing chamber 100. The side of the magnetic conduction structure 500 away from the second segment 320 can be the side of the magnetic yoke 200 close to the arc extinguishing chamber 100.

[0089] In summary, a limiting plate 710 is provided inside the base 700. When the limiting plate 710 abuts against a part of the yoke 200, the limiting plate 710 can support the yoke 200. When the limiting plate 710 abuts against the side of the magnetic conduction structure 500 away from the second segment 320, the limiting plate 710 can limit the magnetic conduction structure 500, so that the limiting plate 710 can achieve the effect of multiplexing. Moreover, since the magnetic conduction structure 500 is only placed inside the base 700, setting the limiting plate 710 can reduce the possibility of the magnetic conduction structure 500 shaking or displacing inside the base 700, increase the reliability of use of the magnetic conduction structure 500, and thus increase the reliability of use of the arc extinguishing mechanism.

[0090] Please continue to refer to Figure 5 and Figure 10 As shown, the base 700 further includes a limiting post 720. The limiting post 720 is provided on one side of the limiting plate 710, and the installation space 400 is located between the limiting plate 710 and the limiting post 720. The side of the magnetic conduction structure 500 close to the second segment 320 abuts against the limiting post 720.

[0091] The limiting post 720 can be a cylindrical structure provided in the direction of the top cover 600 of the base 700. The limiting post 720 is opposite to the limiting plate 710 in position, and the installation space 400 is located between the limiting post 720 and the limiting plate 710.

[0092] Threaded holes can be provided on the limiting post 720, and through holes opposite to the threaded holes in position can be provided on the top cover 600. When the top cover 600 and the base 700 are covered, bolts can be used to pass through the through holes provided on the top cover 600 and be fastened in the threaded holes, so as to fix the top cover 600 and the base 700.

[0093] Through the above settings, the limiting post 720 is provided on one side of the limiting plate 710, and the installation space 400 is located between the limiting plate 710 and the limiting post 720. After the magnetic conduction structure 500 is placed in the installation space 400, the end of the magnetic conduction structure 500 away from the second segment 320 can be limited by the limiting plate 710, and the end of the magnetic conduction structure 500 close to the second segment 320 can be limited by the limiting post 720. In this way, the displacement of the magnetic conduction component in the installation space 400 is limited in the arrangement direction of the limiting plate 710 and the limiting post 720, reducing the possibility of the magnetic conduction component moving along the installation direction of the limiting plate 710 and the limiting post 720, increasing the reliability of use of the magnetic conduction structure 500, and thus increasing the reliability of use of the arc extinguishing mechanism.

[0094] As Figure 6 、 Figure 7 and Figure 10As shown, a relief groove 550 is provided on the side of the magnetic conductive structure 500 close to the second segment 320. The limiting post 720 abuts against the groove wall of the relief groove 550.

[0095] The relief groove 550 can be a blind groove formed on the second side wall 520. The relief groove 550 can be an arc-shaped groove. In this way, the groove walls of the relief groove 550 can all be arc-shaped. Thus, the limiting post 720 can better abut against the groove wall of the relief groove 550.

[0096] Through the above arrangement, when the side of the magnetic conductive structure 500 close to the second segment 320 abuts against the limiting post 720, the limiting post 720 can abut against the groove wall of the relief groove 550 provided on the side of the magnetic conductive structure 500 close to the second segment 320. In this way, interference between the arrangement of the magnetic conductive structure 500 and the limiting post 720 can be avoided, the possibility that the magnetic conductive structure 500 cannot be placed in the installation space 400 is reduced, and the reliability of the arc extinguishing mechanism in use is increased.

Claims

1. An arc extinguishing mechanism, characterized in that, Applied to a circuit breaker, the arc extinguishing mechanism includes: An arc extinguishing chamber; A yoke, disposed on one side of the arc extinguishing chamber, and a non-zero angle is formed between the yoke and the arc extinguishing chamber; A static contact, including a first segment and a second segment connected to each other, a non-zero angle is formed between the first segment and the second segment, and at least a part of the first segment is located within the yoke; The arc extinguishing chamber, the yoke, and the second segment enclose an installation space; A magnetic conduction structure, disposed within the installation space, and the magnetic conduction structure is used to increase the magnetic field within the circuit breaker.

2. The arc extinguishing mechanism according to claim 1, wherein The magnetic conduction structure can fill the installation space.

3. The arc extinguishing mechanism according to claim 2, wherein, The magnetic conduction structure is of a triangular prism type, and the magnetic conduction structure includes a first side wall, a second side wall, and a third side wall connected end to end; The first side wall is parallel to the yoke, the second side wall is parallel to the second segment, and the third side wall is parallel to the arc extinguishing chamber.

4. The arc extinguishing mechanism according to claim 1, characterized in that, The magnetic conduction structure includes a plurality of magnetic conduction sheets; The plurality of magnetic conduction sheets are arranged in a mutually attached manner.

5. The arc extinguishing mechanism according to claim 4, characterized in that, The circuit breaker includes a top cover, and the plurality of magnetic conduction sheets are riveted to each other; The magnetic conduction sheet is provided with a riveting boss, and the riveting boss faces the top cover; A limiting groove is provided on one side of the top cover facing the magnetic conduction sheet, and the riveting boss is located within the limiting groove.

6. The arc extinguishing mechanism according to claim 1, wherein, The circuit breaker further includes a base; The arc extinguishing chamber, the yoke, the static contact, and the magnetic conduction structure are all disposed within the base.

7. The arc extinguishing mechanism according to claim 6, characterized in that, The base includes a limiting plate; A part of the yoke abuts against the limiting plate, and one side of the magnetic conduction structure away from the second segment abuts against the limiting plate.

8. The arc extinguishing mechanism according to claim 7, characterized in that, The base further includes a limiting post, the limiting post is disposed on one side of the limiting plate, and the installation space is located between the limiting plate and the limiting post; One side of the magnetic conduction structure close to the second segment abuts against the limiting post.

9. The arc extinguishing mechanism according to claim 8, wherein, A relief groove is provided on one side of the magnetic conduction structure close to the second segment; The limiting post abuts against the groove wall of the relief groove.

10. A circuit breaker, characterized in that, Including a top cover, a base, and the arc extinguishing mechanism according to any one of claims 1 to 9; After the top cover and the base are closed, an accommodation cavity is formed; The arc extinguishing chamber, the yoke, the static contact, and the magnetic conduction structure are all disposed within the accommodation cavity.

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