Arc extinguishing assembly and circuit breaker

Abstract

The utility model provides an arc extinguishing assembly and a circuit breaker, and relates to the technical field of electrical equipment. The arc extinguishing assembly comprises an arc extinguishing chamber and an arc extinguishing structure. The arc extinguishing chamber is provided with an exhaust end, the arc extinguishing structure comprises a plurality of arc extinguishing grid plates which are arranged at intervals, an interval between every two adjacent arc extinguishing grid plates forms an air passing hole, and the air passing holes are opposite to the exhaust end. Under the condition that an electric arc flows out of the exhaust end, the electric arc can enter the arc extinguishing structure through the air passing hole and is cut by the arc extinguishing grid sheet, so that the electric arc is extinguished. Therefore, the electric arc can be extinguished under the condition that the electric arc flows out of the arc extinguish chamber, the possibility that the electric arc is reignited in the circuit breaker and even the electric arc is sprayed out of the circuit breaker due to failure of the arc extinguish chamber is reduced, and potential safety hazards can be reduced.

Description

Technical Field

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

[0002] During the operation of the moving and static contacts of a circuit breaker when breaking a load or a fault current, the voltage between the moving and static contacts will cause air dielectric discharge, forming an arc that is not easily extinguished. To ensure the reliable operation of the circuit breaker, an arc extinguishing chamber is usually provided in the circuit breaker to extinguish the arc.

[0003] However, the arc extinguishing effect of the arc extinguishing chamber is poor, which easily leads to the re-ignition of the arc in the circuit breaker, and even the phenomenon that the arc sprays out of the circuit breaker, forming a safety hazard. Utility Model Content

[0004] The present application provides an arc extinguishing component and a circuit breaker, which can reduce the possibility of arc re-ignition and the phenomenon that the arc sprays out of the circuit breaker, thereby reducing safety hazards.

[0005] In a first aspect, the present application provides an arc extinguishing component, including an arc extinguishing chamber and an arc extinguishing structure. The arc extinguishing chamber has an exhaust end. The arc extinguishing structure includes a plurality of arc extinguishing grid plates arranged at intervals. The interval between two adjacent arc extinguishing grid plates forms a through-hole, and the through-hole is opposite to the exhaust end.

[0006] When an arc flows out at the exhaust end, the arc can enter the arc extinguishing structure through the through-hole and be cut by the arc extinguishing grid plates, so that the arc is extinguished.

[0007] Through the setting of the arc extinguishing structure, the arc can be extinguished when the arc flows out of the arc extinguishing chamber, reducing the possibility of the arc re-igniting in the circuit breaker due to the failure of the arc extinguishing chamber, and even the phenomenon that the arc sprays out of the circuit breaker, and can reduce safety hazards.

[0008] Optionally, a plurality of arc extinguishing plates are arranged at intervals in the first direction in the arc extinguishing chamber. The arc extinguishing structure further includes a frame body, and a plurality of installation spaces are arranged in the second direction inside the frame body. The arc extinguishing grid plates are distributed in the plurality of installation spaces, and the arc extinguishing grid plates in one installation space are arranged at intervals in the first direction.

[0009] Wherein, the first direction intersects with the second direction.

[0010] Through the above setting, the arc flowing out from the exhaust end can first move to two installation spaces, and then be cut by the arc extinguishing grid plates in each installation space, and the cutting effect on the arc extinguishing grid plates is better.

[0011] Optionally, in two adjacent installation spaces, the arc extinguishing grid plates in one installation space are arranged in a staggered manner with the arc extinguishing grid plates in the other installation space.

[0012] In this way, the air holes in adjacent installation spaces can be staggered, which is conducive to the arc extinguishing grid cutting the arc and achieving the effect of rapid arc extinguishing. In addition, the possibility of the arc breaking through the partition and damaging the frame can be reduced, and the service life of the arc extinguishing structure can be increased.

[0013] Optionally, the frame has a connection surface facing the arc extinguishing grid. In the second direction, the arc extinguishing grid has a first connection portion and a second connection portion opposite to each other. The first connection portion and / or the second connection portion is provided with a first connection structure, and a second connection structure is provided on the connection surface, and the first connection structure is connected to the second connection structure.

[0014] Through the above configuration, the arc extinguishing grid and the frame can be connected in different ways, which are specifically described by taking the following three ways as examples.

[0015] Optionally, the arc extinguishing grid is a metal part.

[0016] Thus, the arc extinguishing grid can be made of metal materials. In addition to cutting off the arc, the arc extinguishing grid made of metal materials can also absorb metal charged particles and free ions generated by the arc ionized air, reducing the possibility of metal charged particles and free ions being ejected from the circuit breaker, further reducing safety hazards.

[0017] Optionally, the arc extinguishing assembly is applied to a circuit breaker, the arc extinguishing structure further comprises a frame, the arc extinguishing grid is arranged inside the frame, and a clamping piece is connected to a side of the frame away from the arc extinguishing grid. The circuit breaker comprises a base and a cover arranged oppositely.

[0018] A first mounting groove is provided on one side of the base facing the cover body, and the clamping member is clamped in the first mounting groove. And / or, a second mounting groove is provided on one side of the cover body facing the base, and the clamping member is clamped in the second mounting groove.

[0019] Through the above arrangement, the frame can be installed through the snap-fitting parts.

[0020] When the arc extinguishing structure is provided, the arc extinguishing structure may be clamped with the base through a clamping member, or may be clamped with the cover through a clamping member, or may be clamped with both the base and the cover through a clamping member.

[0021] Optionally, a first limiting rib is provided on the groove wall of the first installation groove, and when the clamping member is clamped in the first installation groove, the clamping member abuts against the first limiting rib and squeezes the first limiting rib.

[0022] In this way, when the frame is clamped to the base through the clamping piece, the clamping piece can be interference fit with the first installation groove, so that the clamping piece and the first installation groove are more firmly clamped, thereby improving the stability of the arc extinguishing structure.

[0023] On the groove wall of the second installation groove, there are second limiting ribs. When the clamping part is clamped in the second installation groove, the clamping part abuts against the second limiting ribs and presses the second limiting ribs.

[0024] In this way, when the frame body is clamped with the cover body through the clamping part, the clamping part can be in interference fit with the second installation groove, making the clamping between the clamping part and the second installation groove more stable and improving the stability of the arc extinguishing structure.

[0025] Optionally, on the side of the base facing the cover body, there is a first reinforcing rib. The first reinforcing rib extends along the direction from the arc extinguishing chamber to the arc extinguishing structure, and the connection part of the first reinforcing rib and the base is a first arc structure.

[0026] And / or, on the side of the cover body facing the base, there is a second reinforcing rib. The second reinforcing rib extends along the direction from the arc extinguishing chamber to the arc extinguishing structure, and the connection part of the second reinforcing rib and the base is a second arc structure.

[0027] The setting of the first reinforcing rib and / or the second reinforcing rib can guide the flow of the arc extinguishing gas when the arc extinguishing gas flows out of the arc extinguishing structure.

[0028] Optionally, in the arc extinguishing chamber, there are multiple arc extinguishing plates distributed at intervals, and there is a first distance L between two adjacent arc extinguishing plates. 1 . In the distribution direction of the arc extinguishing plates, there is a second distance L between two adjacent arc extinguishing grid plates. 2 .

[0029] Among them, L 1 , L 2 Satisfy: L 1 > L 2 .

[0030] In this way, the size of the air holes formed by the arc extinguishing grid plates can be made smaller, improving the arc extinguishing effect.

[0031] In the second aspect, the present application provides a circuit breaker, and the circuit breaker includes the arc extinguishing component in any one of the above first aspects.

[0032] For the circuit breaker provided in the above second aspect and each possible design of the above second aspect, the beneficial effects can refer to the beneficial effects brought by the above first aspect and each possible implementation manner of the first aspect, which will not be elaborated here. Description of the Drawings

[0033] Figure 1 It is a structural diagram of a circuit breaker in an embodiment of the present application with the cover body hidden.

[0034] Figure 2 It is a front view of an arc extinguishing component in an embodiment of the present application.

[0035] Figure 3 Isometric view of an arc extinguishing component according to an embodiment of the present application.

[0036] Figure 4 Schematic diagram of a housing according to an embodiment of the present application.

[0037] Figure 5 Schematic diagram of an arc extinguishing structure according to an embodiment of the present application.

[0038] Figure 6 Schematic diagram of an arc extinguishing grid according to an embodiment of the present application.

[0039] Figure 7 Schematic diagram of a base according to an embodiment of the present application.

[0040] Figure 8 Is Figure 7 Partial enlarged view at position A in

[0041] Figure 9 Schematic diagram of a cover according to an embodiment of the present application.

[0042] Figure 10 Is Figure 9 Partial enlarged view at position B in

[0043] Explanation of reference numerals:

[0044] 100: Arc extinguishing component; 10: Arc extinguishing chamber; 11: Exhaust end; 12: Arc extinguishing piece; 20: Arc extinguishing structure; 21: Arc extinguishing grid; 22: Gas passing hole; 23: Housing; 231: Installation space; 232: Connection surface; 211: First connection part; 212: Second connection part; 213: First connection structure; 214: Groove; 24: Clamping part; 25: Partition; 30: Base; 31: First installation groove; 32: First limiting rib; 33: First reinforcing rib; 40: Cover; 41: Second installation groove; 42: Second limiting rib; 43: Second reinforcing rib; 44: Second arc structure; X: First direction; Y: Second direction. 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. Obviously, 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 scope of protection of the present application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0047] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of this application. The phrase "embodiments" 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. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0048] The term "and / or" herein is merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: the existence of A, the simultaneous existence of A and B, and the existence of B. Additionally, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0049] The directional terms appearing in the following description are all the directions shown in the figures and do not specifically limit the structure of the current-limiting module of this application. For example, in the description of this application, terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 this 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 this application.

[0050] Furthermore, terms such as "first", "second", etc. in the specification, claims or the above-mentioned drawings of this 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.

[0051] In the description of this application, unless otherwise specified, "a plurality of" means two or more (including two). Similarly, "a plurality of groups" means two or more groups (including two groups).

[0052] 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 may refer to a physical connection. For example, a physical connection may be a fixed connection, such as a fixed connection through a spacer, such as a fixed connection through screws, bolts, or other spacers; 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 connection formed by welding, bonding, or integral molding. 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. The "connection" or "coupling" of circuit structures can refer not only to a physical connection but also to 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 element, as long as the circuit is connected. It can also be the connection inside two components; in addition to the signal connection through the circuit, the signal connection can also refer to the 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.

[0053] It should be understood that the "one embodiment" or "an embodiment" mentioned throughout the specification means that the specific features, structures, or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, the "in one embodiment" or "in an embodiment" that appears throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics can be combined in one or more embodiments in any suitable manner.

[0054] An embodiment of the present application provides a circuit breaker, which includes an arc extinguishing component 100 as Figure 1 shown.

[0055] During the opening process of the circuit breaker, the moving and static contacts can be separated to cut off the current in the circuit. When the moving and static contacts are separated, the particles between the moving and static contacts are broken down by the voltage to form an arc, and the arc will be stretched and is not easy to extinguish.

[0056] In the circuit breaker equipped with the above-mentioned arc extinguishing component 100, the arc can be extinguished through the arc extinguishing component 100 to improve the arc extinguishing effect, reduce the possibility of arc reignition, and reduce potential safety hazards.

[0057] Next, the arc extinguishing component 100 provided by the embodiment of the present application will be introduced in detail with reference to the drawings.

[0058] Referring to Figure 1 、 Figure 2 and Figure 3As shown in the figure, the present application provides an arc extinguishing assembly 100, which includes an arc extinguishing chamber 10 and an arc extinguishing structure 20. The arc extinguishing chamber 10 has an exhaust end 11. The arc extinguishing structure 20 includes a plurality of arc extinguishing grid plates 21 arranged at intervals. An interval between two adjacent arc extinguishing grid plates 21 forms a gas passing hole 22, and the gas passing hole 22 faces the exhaust end 11.

[0059] When an arc flows out from the exhaust end 11, the arc can enter the arc extinguishing structure 20 through the gas passing hole 22 and be cut by the arc extinguishing grid plates 21, so that the arc is extinguished.

[0060] In the embodiment of the present application, the arc extinguishing assembly 100 includes an arc extinguishing chamber 10 and an arc extinguishing structure 20. In this way, when an arc is generated, the arc can enter the arc extinguishing chamber 10 and the arc extinguishing structure 20, and the arc extinguishing chamber 10 and the arc extinguishing structure 20 can perform arc extinguishing twice to extinguish the arc.

[0061] Specifically, the arc can first enter the arc extinguishing chamber 10, and the arc extinguishing chamber 10 first performs arc extinguishing on the arc once. For the arc that cannot be extinguished by the arc extinguishing chamber 10, it can be discharged from the arc extinguishing chamber 10 through the exhaust end 11.

[0062] Since the gas passing hole 22 faces the exhaust end 11, the arc that is not extinguished by the arc extinguishing chamber 10 can enter the gas passing hole 22 through the exhaust end 11 and be cut by the arc extinguishing grid plates 21. At this time, the arc extinguishing structure 20 can perform secondary arc extinguishing on the arc.

[0063] Through the setting of the arc extinguishing structure 20, the arc can be extinguished when an arc flows out of the arc extinguishing chamber 10, reducing the possibility of the arc reigniting in the circuit breaker due to the failure of the arc extinguishing chamber 10, and even the phenomenon that the arc sprays out of the circuit breaker, which can reduce potential safety hazards.

[0064] In the related art, if the arc is not completely extinguished after passing through the arc extinguishing chamber 10, the partially unextinguished arc will flow out from the exhaust end 11 carrying metal charged particles. And the partially unextinguished arc will also break down the air to generate free ions, and the free ions and the metal charged particles in the arc will damage the air dielectric strength, causing the partially unextinguished arc to reignite.

[0065] After the arc reignites, on the one hand, it will cause other components inside the circuit breaker to burn out. On the other hand, the arc may also spray out of the circuit breaker, which is extremely likely to damage the circuit breaker and other equipment near the circuit breaker, threatening personal safety.

[0066] However, in the embodiment of the present application, even if the arc extinguishing chamber 10 fails and an arc flows out from the exhaust end 11, the flowing arc can be cut again in the arc extinguishing structure 20, so that the arc is extinguished in the arc extinguishing structure 20.

[0067] In this way, the possibility of arc re-ignition can be reduced, and further, the possibility of burning other components inside the circuit breaker, the circuit breaker, and other devices near the circuit breaker can be reduced, thereby reducing potential safety hazards.

[0068] In some embodiments, as Figures 2 to 4 shown, a plurality of arc extinguishing plates 12 are arranged in the arc extinguishing chamber 10 at intervals along the first direction X. The arc extinguishing structure 20 may further include a frame 23, and a plurality of installation spaces 231 are arranged inside the frame 23 along the second direction Y. The arc extinguishing grid plates 21 are distributed in the plurality of installation spaces 231, and the arc extinguishing grid plates 21 in one installation space 231 are arranged at intervals along the first direction X.

[0069] The arc extinguishing plates 12 are arranged at intervals, and the arc can be cut into several small segments, so that the "zero-crossing" of the alternating current and the "near-cathode effect" of the arc can be utilized to achieve the purpose of quickly extinguishing the arc.

[0070] The arc extinguishing structure 20 includes a frame 23, and a plurality of arc extinguishing grid plates 21 can be arranged in the installation space 231 in the frame 23.

[0071] In the embodiments of the present application, the plurality of installation spaces 231 are arranged along the second direction Y, and each installation space 231 can be provided with arc extinguishing grid plates 21. Compared with the method of arranging one installation space 231 for installing the arc extinguishing grid plates 21 in the frame 23, this arrangement of the present application makes the through holes 22 formed between adjacent arc extinguishing grid plates 21 smaller.

[0072] Therefore, the arc flowing out from the exhaust end 11 can first move to the plurality of installation spaces 231, and then be cut by the arc extinguishing grid plates 21 in each installation space 231, and the cutting effect on the arc extinguishing grid plates 21 is better.

[0073] Wherein, the first direction X intersects with the second direction Y. In this way, the distribution direction of the plurality of installation spaces 231 can be different from the distribution direction of the arc extinguishing grid plates 21 in one installation space 231. In a circuit breaker with limited space, this can make the through holes 22 formed by the arc extinguishing grid plates 21 smaller, which is convenient for the arc extinguishing grid plates 21 to cut the arc.

[0074] It should be noted that there may be an included angle between the first direction X and the second direction Y, and the included angle can be 80°, 89°, 90°, 97°, 100°, etc. The specific size of the included angle between the first direction X and the second direction Y is not specifically limited in the embodiments of the present application. As long as the arc extinguishing grid plates 21 arranged in the installation space 231 can cut the arc.

[0075] It should also be noted that the number of the installation spaces 231 can be 2, 3, 4, etc., and the specific number of the installation spaces 231 is not specifically limited in the embodiments of the present application.

[0076] Preferably, the number of the installation spaces 231 can be 2, and the multiple arc extinguishing grid pieces 21 can be distributed in the 2 installation spaces 231. In this way, the arc extinguishing grid pieces 21 can cut the electric arc well, and can also avoid increasing the difficulty of the electric arc entering the gas passing holes 22 and being cut by the arc extinguishing grid pieces 21 when the gas passing holes 22 are too small.

[0077] In addition, when the number of the installation spaces 231 is large, it is also not conducive to the dissipation of the electric arc energy, and the improvement of the electric arc extinguishing effect is insufficient.

[0078] Of course, the frame body 23 can also be provided with one installation space 231. At this time, the multiple arc extinguishing grid pieces 21 are spaced apart along the first direction X in the installation space 231. This can also cut the electric arc flowing out from the exhaust end 11 and reduce the possibility of the electric arc reigniting.

[0079] In addition, in order to make the size of the gas passing holes 22 appropriate, so that the arc extinguishing grid pieces 21 can normally cut off the electric arc and avoid the possibility of the problem that the electric arc is difficult to enter the gas passing holes 22, the number of the arc extinguishing grid pieces 21 can be between 10 and 15.

[0080] For example, the number of the arc extinguishing grid pieces 21 can be 10, 13, 14 or 15, and the application does not specifically limit the number of the arc extinguishing grid pieces 21 either.

[0081] Preferably, the number of the arc extinguishing grid pieces 21 can be 12. When the number of the installation spaces 231 is 2, 6 arc extinguishing grid pieces 21 can be distributed in each installation space 231.

[0082] Among them, as Figure 4 shown, a partition plate 25 can be arranged inside the frame body 23, and the partition plate 25 can divide the space inside the frame body 23 into different installation spaces 231 so as to arrange the arc extinguishing grid pieces 21 in the different installation spaces 231.

[0083] In some embodiments, as Figure 4 and Figure 5 shown, in two adjacent installation spaces 231, the arc extinguishing grid pieces 21 in one installation space 231 can be arranged in a staggered manner with the arc extinguishing grid pieces 21 in the other installation space 231.

[0084] In this way, the gas passing holes 22 in the adjacent installation spaces 231 can be staggered, which is beneficial to the arc extinguishing grid pieces 21 to cut the electric arc and achieve the effect of quickly extinguishing the arc. Moreover, it can also reduce the possibility of the electric arc breaking through the partition plate 25 and damaging the frame body 23, and improve the service life of the arc extinguishing structure 20.

[0085] Alternatively, the arc extinguishing grid plates 21 in one of the two adjacent mounting spaces 231 can also be disposed opposite to the arc extinguishing grid plates 21 in the other mounting space 231.

[0086] In this setting, the arc extinguishing grid plates 21 can also cut the electric arc. However, since the arc extinguishing grid plates 21 are disposed opposite to each other, the air holes 22 in the adjacent mounting spaces 231 are also opposite to each other. At this time, the opposite air holes 22 will be on the same straight line. When an electric arc enters the air holes 22, the electric arc is likely to penetrate the partition plate 25 in the housing 23, and then easily burn through the housing 23, damaging the arc extinguishing structure 20.

[0087] In some embodiments, as Figure 4 and Figure 5 shown, the housing 23 has a connection surface 232 facing the arc extinguishing grid plates 21. Since the arc extinguishing grid plates 21 are disposed inside the housing 23, the connection surface 232 can specifically be the inner surface of the housing 23.

[0088] When a partition plate 25 is further disposed inside the housing 23, the arc extinguishing grid plates 21 are connected to both the inner surface of the housing 23 and the partition plate 25. At this time, the connection surface 232 includes the inner surface of the housing 23 and the surface of the partition plate 25 facing the arc extinguishing grid plates 21.

[0089] As Figure 5 and Figure 6 shown, in the second direction Y, the arc extinguishing grid plates 21 have opposite first connection portions 211 and second connection portions 212. The arc extinguishing grid plates 21 can be connected inside the housing 23 through the first connection portions 211 and the second connection portions 212.

[0090] The arc extinguishing grid plates 21 and the housing 23 can be connected in different ways. Specifically, the following three ways are taken as examples for illustration.

[0091] Way 1: The first connection portion 211 is provided with a first connection structure 213, and a second connection structure is provided on the connection surface 232. The first connection structure 213 can be connected to the second connection structure.

[0092] In this way, one end of the arc extinguishing grid plates 21 can be connected to the housing 23 through the first connection structure 213.

[0093] The connection between the first connection structure 213 and the second connection structure can improve the connection strength between the arc extinguishing grid plates 21 and the housing 23, and reduce the possibility that after the electric arc moves to the arc extinguishing structure 20, the impact on the arc extinguishing grid plates 21 causes the arc extinguishing structure 20 to come out of the housing 23.

[0094] In the second method, the second connecting portion 212 is provided with a first connecting structure 213, and the second connecting structure is provided on the connecting surface 232. The first connecting structure 213 can be connected to the second connecting structure.

[0095] In this way, the other end of the arc extinguishing grid piece 21 can also be connected to the frame 23 through the first connecting structure.

[0096] Through the above settings, the connection strength between the arc extinguishing grid piece 21 and the frame 23 can also be improved, and after the arc moves to the arc extinguishing structure 20, the impact on the arc extinguishing grid piece 21 can be reduced, and the possibility that the arc extinguishing structure 20 disengages from the frame 23 can be reduced.

[0097] In the third method, both the first connecting portion 211 and the second connecting portion 212 are provided with a first connecting structure 213, the second connecting structure is provided on the connecting surface 232, and the first connecting structure 213 can be connected to the second connecting structure.

[0098] For the description of the first connecting structure 213 provided on the first connecting portion 211, reference can be made to the relevant description in the first method. For the description of the first connecting structure 213 provided on the second connecting portion 212, reference can be made to the relevant description in the second method, and details will not be elaborated here.

[0099] It should be noted that the first connecting structure 213 and the second connecting structure can also have different settings. For example, as Figure 6 shown, the first connecting structure 213 can be a groove 214. Correspondingly, the second connecting structure can be a boss adapted to the groove 214. When setting the arc extinguishing grid piece 21, the boss can be embedded in the groove 214 and connected to the groove wall of the groove 214.

[0100] Or, the first connecting structure 213 can be a protrusion, and correspondingly, the second connecting structure can be a depression adapted to the protrusion. When setting the arc extinguishing grid piece 21, the protrusion can be embedded in the depression and connected to each other.

[0101] For the specific settings of the first connecting structure 213 and the second connecting structure, the embodiments of the present application do not make specific limitations here.

[0102] In the embodiments of the present application, the arc extinguishing grid piece 21 can be connected to the frame 23 through the first connecting portion 211 and the second connecting portion 212. The connection between the first connecting structure 213 and the second connecting structure can also increase the connection strength between the arc extinguishing grid piece 21 and the frame 23.

[0103] Compared with the connection method between the arc extinguishing grid piece 21 and the plane when the connecting surface 232 is a plane, the settings of the first connecting structure 213 and the second connecting structure in the present application can make the arc extinguishing grid piece 21 more stable. Thus, the possibility that the arc extinguishing grid piece 21 is easily disengaged from the frame 23 when the arc extinguishing grid piece 21 receives a force penetrating the installation space 231 can be reduced.

[0104] It should also be noted that the housing 23 can be made of plastic material. In this way, when manufacturing the arc extinguishing structure 20, the arc extinguishing grid pieces 21 can be first placed in the mold, and then injection molding can be carried out in the mold to obtain the arc extinguishing structure 20.

[0105] In the manufacturing process of the above arc extinguishing structure 20, the partition 25 and the second connection structure can both be formed during the injection molding process, which is convenient for manufacturing.

[0106] In some embodiments, the arc extinguishing grid pieces 21 can be metal parts.

[0107] In this embodiment, the arc extinguishing grid pieces 21 can be made of metal material. The arc extinguishing grid pieces 21 made of metal material can not only cut off the electric arc, but also adsorb metal charged particles and free ions, reducing the possibility of metal charged particles and free ions spraying out from the circuit breaker, and further reducing potential safety hazards.

[0108] Among them, in order to make the effect of the present application clearer, the metal charged particles and free ions are specifically described herein.

[0109] When the moving contact and the static contact of the circuit breaker are disconnected to generate an electric arc, in the case of a large arc energy, the moving contact and the static contact will be melted, and metal charged particles will be generated. The electric arc will carry these metal charged particles into the arc extinguishing chamber 10 and the arc extinguishing structure 20.

[0110] Free ions are generated when the electric arc breaks down the air.

[0111] The arc extinguishing grid pieces 21 made of metal material have a good adsorption effect on both metal charged particles and free ions. After the metal charged particles and free ions enter the through holes 22, they can be adsorbed by the arc extinguishing grid pieces 21.

[0112] That is, it can be considered that the arc extinguishing grid pieces 21 made of metal material have a shielding effect on metal charged particles and free ions, and can reduce the possibility of metal charged particles and free ions flying out from the through holes 22.

[0113] It should be noted that the arc extinguishing grid pieces 21 can specifically be made of materials such as stainless steel and copper-based alloys.

[0114] Of course, in addition to metal materials, the arc extinguishing grid pieces 21 can also be made of non-metal materials, such as non-metal materials such as asbestos and ceramics.

[0115] The arc extinguishing grid pieces 21 made of non-metal materials can extinguish the electric arc by cutting off the electric arc that has not been extinguished by the arc extinguishing chamber 10, and have no adsorption effect on metal charged particles and free ions.

[0116] When the arc extinguishing grid 21 is made of a non-metallic material, although the arc extinguishing grid 21 can cut off the electric arc to extinguish the arc, there may still be metal charged particles and free ions flowing out from the through holes 22. Thus, the metal charged particles and free ions may accumulate on other components in the circuit breaker, affecting other components.

[0117] In some embodiments, as Figure 4 and Figure 5 shown, the arc extinguishing structure 20 further includes a frame 23. The arc extinguishing grid 21 is disposed inside the frame 23, and a clamping member 24 is connected to a side of the frame 23 facing away from the arc extinguishing grid 21.

[0118] As Figure 7 , Figure 8 and Figure 9 shown, the circuit breaker may include a base 30 and a cover 40 which are oppositely arranged.

[0119] The side of the frame 23 facing away from the arc extinguishing grid 21 is the outer surface of the frame 23, and the frame 23 can be installed through the outer surface.

[0120] The base 30 and the cover 40 are snapped together to form the housing of the circuit breaker. An accommodating cavity is formed inside the housing of the circuit breaker, and the arc extinguishing chamber 10 and the arc extinguishing structure 20 can both be disposed in the accommodating cavity to extinguish the electric arc in the accommodating cavity.

[0121] Among them, there may be other components in the accommodating cavity, such as moving and static contacts, a release, etc.

[0122] The clamping member 24 is provided on the frame 23, and the frame 23 can be installed through the clamping member 24. For the convenience of manufacturing, the clamping member 24 can be integrally formed with the frame 23 by injection molding.

[0123] When setting the arc extinguishing structure 20, the arc extinguishing structure 20 can also be set in the accommodating cavity in different ways. The following three ways are taken as examples for illustration.

[0124] Way (1), as Figure 7 and Figure 8 shown, a first installation groove 31 is provided on a side of the base 30 facing the cover 40, and the clamping member 24 is clamped in the first installation groove 31.

[0125] In this way, the clamping member 24 can cooperate with the first installation groove 31 so that the frame 23 can be clamped on the base 30, making the frame 23 fixed relative to the base 30 and realizing the setting of the arc extinguishing structure 20 in the accommodating cavity.

[0126] Way (2), as Figure 9 and Figure 10As shown in the figure, a second installation groove 41 is provided on one side of the cover body 40 facing the base 30, and the clamping member 24 is clamped in the second installation groove 41.

[0127] In this way, the clamping member 24 can cooperate with the second installation groove 41, so that the frame body 23 can be clamped on the cover body 40, making the frame body 23 fixed relative to the cover body 40, and realizing the setting of the arc extinguishing structure 20 in the accommodation cavity.

[0128] In method (3), a first installation groove 31 is provided on one side of the base 30 facing the cover body 40, and the clamping member 24 is clamped in the first installation groove 31. Moreover, a second installation groove 41 is provided on one side of the cover body 40 facing the base 30, and the clamping member 24 is clamped in the second installation groove 41.

[0129] For the description of the clamping member 24 being clamped in the first installation groove 31, reference can be made to the relevant description in method (1). For the description of the clamping member 24 being clamped in the second installation groove 41, reference can be made to the relevant description in method (2), and details will not be elaborated here.

[0130] It should be noted that the base 30 and the cover body 40 can be arranged and fastened along the second direction Y.

[0131] The frame body 23 can have opposite first end and second end in the second direction Y, and the clamping member 24 can be connected to the first end and / or the second end. And in the penetrating direction of the installation space 231, both ends of the clamping member 24 protrude from the frame body 23, as Figure 4 and Figure 5 shown.

[0132] Among them, the clamping member 24 at the first end can be clamped with the first installation groove 31, and the clamping member 24 at the second end can be clamped with the second installation groove 41.

[0133] At this time, the setting position of the clamping member 24 on the frame body 23 and the clamping member 24 can form a structure similar to a "T" shape. Correspondingly, the first installation groove 31 and the second installation groove 41 can also be structures similar to a "T" shape, so that the clamping member 24 can be clamped in the first installation groove 31 and the second installation groove 41.

[0134] Of course, the clamping member 24 can also be of other structures. For example, in the penetrating direction of the installation space 231, only one end of the clamping member 24 can protrude from the frame body 23.

[0135] In this way, the setting position of the clamping member 24 on the frame body 23 and the clamping member 24 can form a structure similar to an inverted "L" shape. Correspondingly, the first installation groove 31 and the second installation groove 41 can also be structures similar to an inverted "L" shape, and so on.

[0136] It should also be noted that multiple first mounting grooves 31 can be provided on the base 30. Correspondingly, multiple clamping members 24 can also be provided at the first end, such as Figure 5 and Figure 7 shown. In this way, the multiple clamping members 24 can be respectively clamped in the multiple first mounting grooves 31, improving the clamping effect between the frame 23 and the base 30, making the arc extinguishing assembly 100 more stable in the installation cavity.

[0137] Among them, the number of the first mounting grooves 31 can be 2, 3, 4, etc. Of course, the number of the first mounting grooves 31 can also be 1. The specific number of the first mounting grooves 31 is not specifically limited in the embodiments of the present application.

[0138] Similarly, multiple second mounting grooves 41 can be provided on the cover 40, and multiple clamping members 24 can also be provided at the second end to improve the clamping effect between the frame 23 and the cover 40. For the specific description of the first mounting groove 31 and the clamping member 24, reference can be made to the above description, and the embodiments of the present application will not repeat it here.

[0139] In some embodiments, first limiting ribs 32 can be provided on the groove wall of the first mounting groove 31. When the clamping member 24 is clamped in the first mounting groove 31, the clamping member 24 abuts against the first limiting ribs 32 and presses the first limiting ribs 32.

[0140] Through the above settings, during the process of arranging the frame 23 on the base 30, the clamping member 24 can press the first limiting ribs 32 in the first mounting groove 31.

[0141] In this way, the first limiting ribs 32 can be deformed, so that the clamping member 24 can be in interference fit with the first mounting groove 31, making the clamping between the clamping member 24 and the first mounting groove 31 more stable and improving the stability of the arc extinguishing structure 20.

[0142] Refer to Figure 8 , Figure 8 which shows the case where the first mounting groove 31 is "T"-shaped. It can be understood that in this case, the first mounting groove 31 can have multiple groove walls. Therefore, first limiting ribs 32 can be provided on all the multiple groove walls of the first mounting groove 31, or first limiting ribs 32 can be provided on some of the groove walls of the first mounting groove 31.

[0143] Similarly, second limiting ribs 42 can be provided on the groove wall of the second mounting groove 41. When the clamping member 24 is clamped in the second mounting groove 41, the clamping member 24 abuts against the second limiting ribs 42 and presses the second limiting ribs 42.

[0144] Through the above settings, during the process of clamping the frame 23 and the cover 40, the clamping member 24 can press the second limiting ribs 42 in the second mounting groove 41.

[0145] In this way, the second limiting rib 42 can be deformed, so that the clamping member 24 can be in interference fit with the second installation groove 41, making the clamping between the clamping member 24 and the second installation groove 41 more stable and improving the stability of the arc extinguishing structure 20.

[0146] Reference Figure 10 , Figure 10 shows a case where the second installation groove 41 is "T"-shaped. It can be understood that in this case, the second installation groove 41 can have multiple groove walls. Therefore, the second limiting ribs 42 can be provided on all the multiple groove walls of the second installation groove 41, or the second limiting ribs 42 can be provided on some of the groove walls of the second installation groove 41.

[0147] In some embodiments, a plurality of arc extinguishing sheets 12 are arranged at intervals in the arc extinguishing chamber 10, and there is a first distance L between two adjacent arc extinguishing sheets 12 1 . In the distribution direction of the arc extinguishing sheets 12, there is a second distance L between two adjacent arc extinguishing grid sheets 21 2 , as Figure 3 shown.

[0148] Wherein, L 1 and L 2 can satisfy the condition of L 1 > L 2 . In this way, the size of the through holes 22 formed by the arc extinguishing grid sheets 21 can be made smaller, improving the arc extinguishing effect.

[0149] Specifically, there is usually arc extinguishing gas in the arc extinguishing chamber 10. The arc extinguishing gas has good insulation, can quickly cool the arc and inhibit the continuous existence of the arc.

[0150] When an arc is generated, the arc extinguishing gas can cool and extinguish the arc in the arc extinguishing chamber 10 and discharge it outwards through the gap between the arc extinguishing sheets 12. And the arc, as a high-temperature conductive free gas, will also flow along with the flow of the arc extinguishing gas.

[0151] Since L 1 > L 2 , therefore, when the arc extinguishing gas flows from the arc extinguishing chamber 10 into the arc extinguishing structure 20, the arc extinguishing gas carrying the part of the arc not extinguished by the arc extinguishing chamber 10 enters a relatively small space from a relatively large space. During this process, the pressure of the arc extinguishing gas increases, which can make the flow rate of the arc extinguishing gas relatively rapid.

[0152] In this way, it is convenient for the arc extinguishing gas to carry the remaining arc into the arc extinguishing structure 20, so that the remaining arc can enter the arc extinguishing structure 20 more quickly. This can reduce the possibility that the arc cannot enter the arc extinguishing structure 20, resulting in damage to other components inside the circuit breaker due to the flow of the arc in the circuit breaker, and improve the arc extinguishing effect.

[0153] In some embodiments, as Figure 1 、 Figure 8 and Figure 9 shown, a first reinforcing rib 33 is provided on one side of the base 30 facing the cover body 40. The first reinforcing rib 33 extends along the direction from the arc extinguishing chamber 10 to the arc extinguishing structure 20, and the connection between the first reinforcing rib 33 and the base 30 is a first arc structure.

[0154] When an arc is generated, the arc can move along the direction from the arc extinguishing chamber 10 to the arc extinguishing structure 20.

[0155] After the arc extinguishing gas carries the part of the arc that has not been extinguished by the arc extinguishing chamber 10 into the arc extinguishing structure 20, the arc extinguishing structure 20 can extinguish this part of the arc. Then, the arc extinguishing gas can be discharged from the arc extinguishing structure 20.

[0156] The above setting of the first reinforcing rib 33 can make the extending direction of the first reinforcing rib 33 consistent with the flowing direction of the arc extinguishing gas. Thus, when the arc extinguishing gas flows out from the arc extinguishing structure 20, the first reinforcing rib 33 can guide the flow of the arc extinguishing gas.

[0157] In this way, the arc extinguishing gas can flow along the first reinforcing rib 33 to the side away from the arc extinguishing chamber 10. Based on this, the possibility that the arc extinguishing gas flows back to the side close to the arc extinguishing chamber 10 or surges in the circuit breaker can be reduced.

[0158] In addition, the connection between the first reinforcing rib 33 and the base 30 can be transitioned by a fillet, so that a first arc structure can be formed directly between the first reinforcing rib 33 and the base 30, reducing the resistance of the arc extinguishing gas flow and improving the smoothness of the arc extinguishing gas flow.

[0159] It should be noted that the circuit breaker can have an exhaust port, and the exhaust port can be located on the side of the arc extinguishing structure 20 facing away from the arc extinguishing chamber 10.

[0160] At this time, the first reinforcing rib 33 can guide the arc extinguishing gas in the direction of the exhaust port, which is convenient for the gas flow to flow out of the circuit breaker through the exhaust port.

[0161] It should also be noted that the number of the first reinforcing ribs 33 is multiple, for example, 2, 3, 4, and so on.

[0162] In this way, the first reinforcing rib 33 can guide the arc extinguishing gas at multiple positions, improving the guiding effect on the arc extinguishing gas.

[0163] When the number of the first reinforcing ribs 33 is multiple, the housing 23 can be in contact with all the multiple first reinforcing ribs 33, making the arc extinguishing structure 20 relatively stable.

[0164] In addition, if only the first reinforcing ribs 33 are needed to improve the stability of the arc extinguishing structure 20, the multiple first reinforcing ribs 33 can also extend in other directions. For example, they can extend along the first direction X.

[0165] Preferably, the number of the first mounting grooves 31 can be 2. The two mounting grooves are arranged at intervals, and the multiple first reinforcing ribs 33 can be arranged between the two mounting grooves. In this case, the clamping member 24 can be connected to both ends of the housing 23 in the first direction X.

[0166] In some embodiments, as Figure 1 , Figure 9 and Figure 10 shown, a second reinforcing rib 43 is provided on one side of the cover body 40 facing the base 30. The second reinforcing rib 43 extends along the direction from the arc extinguishing chamber 10 to the arc extinguishing structure 20, and the connection part of the second reinforcing rib 43 and the base 30 is a second arc structure 44.

[0167] For the description of the second reinforcing rib 43 provided on the cover body 40, reference can be made to the description of the first reinforcing rib 33 provided on the base 30 above. The embodiments of the present application are not specifically limited herein.

[0168] It should be noted that the first reinforcing rib 33 and the second reinforcing rib 43 can be provided simultaneously.

[0169] That is, a first reinforcing rib 33 is provided on one side of the base 30 facing the cover body 40, and a second reinforcing rib 43 can be provided on one side of the cover body 40 facing the base 30. In this way, both the first reinforcing rib 33 and the second reinforcing rib 43 can guide the air flow and improve the guiding effect.

[0170] Moreover, the first end can be in contact with the first reinforcing rib 33, and the second end can be in contact with the second reinforcing rib 43, improving the stability of the arc extinguishing structure 20.

[0171] In addition, the setting of the first reinforcing rib 33 can also improve the strength of the base 30, and the setting of the second reinforcing rib 43 can also improve the strength of the cover body 40, reducing the possibility of damage to the base 30 and the cover body 40.

[0172] It should also be noted that in order to reduce the manufacturing difficulty of the mold, both the first end and the second end of the housing 23 can be flat surfaces. Moreover, both ends of the housing 23 in the first direction X can also be flat surfaces, as Figure 4 , Figure 5 shown. In this way, the housing 23 only protrudes at the position of the clamping member 24, which can make the mold relatively simple and facilitate the manufacture of the housing 23.

[0173] In the embodiment of the present application, even if the arc extinguishing chamber 10 fails and an arc flows out from the exhaust end 11, the flowing arc can be cut again in the arc extinguishing structure 20, so that the arc is extinguished in the arc extinguishing structure 20.

[0174] In this way, the possibility of arc re-ignition can be reduced, and further, the possibility of burning of other components inside the circuit breaker, the circuit breaker, and other devices near the circuit breaker can be reduced, and the potential safety hazard can be lowered.

[0175] Finally, it should be noted that the above embodiments are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An arc extinguishing assembly, characterized in that: include: An arc extinguishing chamber having an exhaust terminal; The arc extinguishing structure comprises a plurality of arc extinguishing grids arranged at intervals, wherein the intervals between two adjacent arc extinguishing grids form air holes, and the air holes are opposite to the exhaust end; When an arc flows out from the exhaust end, the arc can enter the arc extinguishing structure through the air hole and be cut by the arc extinguishing grid, so that the arc is extinguished.

2. The arc extinguishing assembly according to claim 1, characterized in that: The arc extinguishing chamber is provided with a plurality of arc extinguishing plates spaced apart and distributed along a first direction; The arc extinguishing structure further comprises a frame, wherein the frame has a plurality of installation spaces distributed along the second direction; The arc-extinguishing grids are distributed in a plurality of the installation spaces, and the arc-extinguishing grids in one of the installation spaces are distributed at intervals along the first direction; The first direction intersects with the second direction.

3. The arc extinguishing assembly according to claim 2, characterized in that: In two adjacent installation spaces, the arc-extinguishing grid in one installation space is arranged in a staggered manner with respect to the arc-extinguishing grid in the other installation space.

4. The arc extinguishing assembly according to claim 2, characterized in that: The frame has a connection surface facing the arc-extinguishing grid; In the second direction, the arc-extinguishing grid has a first connecting portion and a second connecting portion opposite to each other; The first connection portion and / or the second connection portion is provided with a first connection structure, the connection surface is provided with a second connection structure, and the first connection structure is connected to the second connection structure.

5. The arc extinguishing assembly according to claim 1, characterized in that: The arc extinguishing grid is a metal piece.

6. The arc extinguishing assembly according to claim 1, characterized in that: The arc extinguishing assembly is applied to a circuit breaker, the arc extinguishing structure further comprises a frame, the arc extinguishing grid is arranged inside the frame, and a clamping piece is connected to a side of the frame away from the arc extinguishing grid; The circuit breaker comprises a base and a cover body which are arranged opposite to each other; A first mounting groove is provided on one side of the base facing the cover body, and the clamping member is clamped in the first mounting groove; And / or, a second mounting groove is provided on a side of the cover body facing the base, and the clamping member is clamped in the second mounting groove.

7. The arc extinguishing assembly according to claim 6, characterized in that: In the case where a first installation groove is provided on the base, a first limiting rib is provided on the groove wall of the first installation groove, and the clamping member abuts against the first limiting rib and presses the first limiting rib; In the case where the cover body is provided with a second installation groove, a second limiting rib is provided on the groove wall of the second installation groove, and the clamping member abuts against the second limiting rib and presses the second limiting rib.

8. The arc extinguishing assembly according to claim 6, characterized in that: A first reinforcing rib is provided on one side of the base facing the cover body, the first reinforcing rib extends along the direction from the arc extinguishing chamber to the arc extinguishing structure, and the connection between the first reinforcing rib and the base is a first arc structure; And / or, a second reinforcing rib is provided on the side of the cover body facing the base, the second reinforcing rib extends in the direction from the arc extinguishing chamber to the arc extinguishing structure, and the connection between the second reinforcing rib and the base is a second arc structure.

9. The arc extinguishing assembly according to claim 1, characterized in that: The arc extinguishing chamber is provided with a plurality of arc extinguishing plates distributed at intervals, and a first distance L1 is provided between two adjacent arc extinguishing plates; In the distribution direction of the arc-extinguishing plates, there is a second distance L2 between two adjacent arc-extinguishing grid plates; Wherein, L1 and L2 satisfy: L1>L2.

10. A circuit breaker, characterized in that: The circuit breaker comprises the arc extinguishing assembly according to any one of claims 1-9.

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