Arc extinguish chamber and circuit breaker

Abstract

The utility model provides an arc extinguish chamber and a circuit breaker, and relates to the technical field of electrical equipment. The arc extinguish chamber comprises a side plate assembly, a white board and a protective cover. The arc extinguishing cavity of the side plate assembly comprises an arc outlet side. The white paperboard is located on the arc outlet side. The protective cover is connected to the side, close to the middle cover, of the side plate assembly and shields the side, close to the middle cover, of the white paperboard. The side, away from the middle cover, of the white paperboard is connected with the side plate assembly, the side, close to the middle cover, of the white paperboard is connected with the protective cover, the side plate assembly, the protective cover and the white paperboard are assembled into a whole, the arc extinguish chamber can be integrally placed into the base after being assembled outside the shell of the circuit breaker, then the middle cover and the base are closed, and the arc extinguish chamber is assembled into a whole. And the whole arc extinguish chamber can be installed in the shell. Therefore, the difficulty of mounting the arc extinguish chamber to the shell is reduced, and the mounting efficiency of the arc extinguish chamber is improved. Moreover, the white paperboard is not in contact with the middle cover, so that the possibility that structural members in the arc extinguish chamber are damaged when the arc extinguish chamber is mounted to the shell can be reduced.

Description

Technical Field

[0001] This application relates to the technical field of electrical equipment, and particularly relates to an arc extinguishing chamber 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 overload and short circuit occur in the system, the circuit breaker can cut off the circuit by tripping to prevent the expansion of the fault. When the circuit breaker trips, an arc will be generated between the moving contact and the static contact. The circuit breaker is usually provided with an arc extinguishing chamber, through which the arc can be transferred and extinguished.

[0003] However, in the related art, the structural design of the arc extinguishing chamber is unreasonable, resulting in low installation efficiency when the arc extinguishing chamber is installed into the housing of the circuit breaker, and it is easy to cause damage to the structural components inside the arc extinguishing chamber during installation. Summary of the Utility Model

[0004] This application provides an arc extinguishing chamber and a circuit breaker, which can improve the installation efficiency of the arc extinguishing chamber and reduce the possibility of damage to the structural components inside the arc extinguishing chamber when the arc extinguishing chamber is installed into the housing.

[0005] In a first aspect, this application provides an arc extinguishing chamber for use in a circuit breaker. The circuit breaker includes a middle cover. The arc extinguishing chamber includes a side plate assembly, a white cardboard, and a protective cover. The side plate assembly includes an arc extinguishing cavity, and the arc extinguishing cavity includes an arc outlet side. The white cardboard is located on the arc outlet side. The protective cover is connected to one side of the side plate assembly close to the middle cover, and the protective cover shields one side of the white cardboard close to the middle cover. One side of the white cardboard away from the middle cover is connected to the side plate assembly, and one side of the white cardboard close to the middle cover is connected to the protective cover, so that the side plate assembly, the protective cover, and the white cardboard are assembled into a whole.

[0006] Through the above solution, the side plate assembly, the protective cover, and the white cardboard are assembled into a whole, so that the arc extinguishing chamber can be assembled outside the housing of the circuit breaker and then integrally placed into the base, and then the middle cover is covered with the base to realize the installation of the whole arc extinguishing chamber inside the housing, instead of installing the side plate assembly, the protective cover, and the white cardboard into the narrow housing one by one. In this way, the difficulty of installing the arc extinguishing chamber into the housing is reduced, which is convenient for improving the installation efficiency of the arc extinguishing chamber. Moreover, the white cardboard will not contact the middle cover, which can reduce the possibility of damage to the structural components inside the arc extinguishing chamber when the arc extinguishing chamber is installed into the housing.

[0007] In a possible design, an installation groove is provided on the side of the protective cover facing the white cardboard, and one side of the white cardboard close to the middle cover is located in the installation groove.

[0008] Through the above solution, when the gas in the arc extinguishing chamber impacts the white cardboard and discharges from the gap between the white cardboard and the side plate assembly, one groove wall of the installation groove far from the arc extinguishing cavity can abut against the white cardboard and limit the position of the side of the white cardboard close to the middle cover. Through the cooperation of the white cardboard and the installation groove, the possibility of the side of the white cardboard close to the middle cover coming out of the installation groove is reduced, thus facilitating ensuring that the white cardboard can play its role better.

[0009] In a possible design, the protective cover includes a first cover body and a second cover body. The first cover body and the second cover body are spliced side by side, and both the first cover body and the second cover body are connected to the side plate assembly. The installation groove includes a first groove and a second groove. The first groove is provided in the first cover body, and the second groove is provided in the second cover body. The part of the white cardboard close to the first cover body is located in the first groove, and the part of the white cardboard close to the second cover body is located in the second groove.

[0010] Through the above solution, the first cover body and the second cover body are spliced side by side to form the protective cover, which can reduce the forming and processing difficulty of the protective cover and facilitate improving the processing efficiency of the protective cover. The first cover body is provided with the first groove, so that the part of the white cardboard close to the first cover body can be located in the first groove, and the white cardboard is limited by the first groove. Similarly, the second cover body is provided with the second groove, so that the part of the white cardboard close to the second cover body can be located in the second groove, and the white cardboard is limited by the second groove.

[0011] In a possible design, the side plate assembly includes a first side plate and a second side plate. The first side plate and the second side plate are arranged at intervals, and an arc extinguishing cavity is formed between the first side plate and the second side plate. The first cover body includes a first shielding plate and a first flanging that are connected to each other. The first shielding plate is located on the side of the arc extinguishing cavity close to the middle cover, and the first flanging is connected to the side of the first side plate far from the second side plate. The second cover body includes a second shielding plate and a second flanging that are connected to each other. The second shielding plate is located on the side of the arc extinguishing cavity close to the middle cover, and the second flanging is connected to the side of the second side plate far from the first side plate. The first groove is provided in the first shielding plate, and the second groove is provided in the second shielding plate.

[0012] Through the above solution, the first cover body is set to include the first shielding plate and the first flanging, so that the first cover body can not only shield the side of the arc extinguishing cavity close to the middle cover through the first shielding plate, but also realize the connection between the first cover body and the first side plate through the first flanging. While ensuring the shielding function of the first cover body, it can facilitate the connection between the first cover body and the side plate assembly. In addition, the first shielding plate is provided with the first groove, which is convenient for providing an installation position for the side of the white cardboard close to the middle cover and realizing the connection between the white cardboard and the protective cover.

[0013] Similarly, the second cover is provided to include a second baffle and a second flanging, so that the second cover can not only shield the side of the arc extinguishing chamber close to the middle cover through the second baffle, but also realize the connection between the second cover and the second side plate through the second flanging. While ensuring the shielding function of the second cover, it is convenient to connect the second cover with the side plate assembly. In addition, the second baffle is provided with a second groove, which is convenient to provide an installation position for the side of the white cardboard close to the middle cover, and realize the connection between the white cardboard and the protective cover.

[0014] In a possible design, a first fixing post is provided on the side of the first flanging facing the second flanging, and a second fixing post is provided on the side of the second flanging facing the first flanging. One end of the first fixing post facing the second fixing post is provided with a first connecting portion, and one end of the second fixing post facing the first fixing post is provided with a second connecting portion. The end of the first fixing post provided with the first connecting portion passes through the first side plate and is located in the arc extinguishing chamber, and the end of the second fixing post provided with the second connecting portion passes through the second side plate and is located in the arc extinguishing chamber, and the first connecting portion is connected to the second connecting portion.

[0015] Through the above solution, connecting the first connecting portion and the second connecting portion can realize the connection between the protective cover and the side plate assembly.

[0016] In a possible design, the first side plate is provided with a first extension plate, and the first extension plate is provided with a first slot, and the part of the white cardboard opposite to the first slot is inserted into the first slot. The second side plate is provided with a second extension plate, and the second extension plate is provided with a second slot, and the part of the white cardboard opposite to the second slot is inserted into the second slot.

[0017] Through the above solution, the part of the white cardboard opposite to the first slot is inserted into the first slot, which can realize the connection between the white cardboard and the first side plate. The part of the white cardboard opposite to the second slot is inserted into the second slot, which can realize the connection between the white cardboard and the second side plate. In this way, the first slot and the second slot can cooperate to fix the position of the white cardboard, so as to connect the white cardboard with the side plate assembly and reduce the possibility that the side of the white cardboard far from the middle cover moves in the direction of the gas discharging from the arc extinguishing chamber.

[0018] In a possible design, the part of the white cardboard opposite to the first slot is provided with a first card slot, and the first extension plate is clamped with the first card slot. And / or, the part of the white cardboard opposite to the second slot is provided with a second card slot, and the second extension plate is clamped with the second card slot.

[0019] Through the above solution, the first extension plate is engaged with the first card slot, enabling the connection between the white cardboard and the first side plate. The second extension plate is engaged with the second card slot, enabling the connection between the white cardboard and the second side plate. In this way, the first card slot and the second card slot can further cooperate to fix the position of the white cardboard, so as to connect the white cardboard with the side plate assembly and reduce the possibility of the side of the white cardboard away from the middle cover moving in the arrangement direction of the first side plate and the second side plate.

[0020] In a possible design, the arc extinguishing chamber further includes a partition plate, which is located on the arc outlet side and on the side of the white cardboard close to the arc extinguishing cavity. The partition plate is provided with ventilation holes, which communicate with the arc extinguishing cavity. The side of the partition plate away from the middle cover is connected to the side plate assembly, and the side of the partition plate close to the middle cover is connected to the protective cover.

[0021] By connecting the side of the partition plate away from the middle cover to the side plate assembly and the side of the partition plate close to the middle cover to the protective cover, the possibility of the side of the partition plate close to the middle cover and the side of the partition plate away from the middle cover moving in the direction of gas discharging from the arc extinguishing cavity can be reduced. The partition plate is provided with ventilation holes, which can facilitate the gas in the arc extinguishing cavity to be discharged through the ventilation holes to reduce the air pressure in the arc extinguishing cavity.

[0022] In a possible design, the side of the partition plate close to the middle cover is located in the first groove and the second groove, and the side of the partition plate away from the middle cover is inserted into the first slot and the second slot.

[0023] Through the above solution, the connection between the side of the partition plate close to the middle cover and the protective cover can be achieved, and the connection between the side of the partition plate away from the middle cover and the side plate assembly can be achieved.

[0024] In a second aspect, the present application provides a circuit breaker, including the arc extinguishing chamber of the first aspect.

[0025] 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a combined structural schematic diagram of an arc extinguishing chamber provided by an embodiment of the present application.

[0027] Figure 2 It is an exploded view of an arc extinguishing chamber provided by an embodiment of the present application.

[0028] Figure 3 It is a combined structural schematic diagram of a protective cover provided by an embodiment of the present application.

[0029] Figure 4 It is an exploded view of a protective cover provided by an embodiment of the present application from a perspective.

[0030] Figure 5 This is an exploded view of a protective cover provided by an embodiment of the present application from another perspective.

[0031] Figure 6 This is a schematic structural diagram of a white cardboard provided by an embodiment of the present application.

[0032] Figure 7 This is a schematic structural diagram of a partition provided by an embodiment of the present application.

[0033] Explanation of reference numerals:

[0034] 100, arc extinguishing chamber;

[0035] 110, side plate assembly; 111, first side plate; 1111, first through hole; 1112, first extension plate; 1113, first slot; 112, second side plate; 1121, second through hole; 1122, second extension plate; 1123, second slot;

[0036] 120, white cardboard; 121, first card slot; 122, second card slot;

[0037] 130, protective cover; 131, mounting groove; 1311, first groove; 1312, second groove; 132, first cover body; 1321, first shielding plate; K1, first exhaust hole; 1322, first flanging; Z1, first fixing column; L1, first connecting portion; 133, second cover body; 1331, second shielding plate; K2, second exhaust hole; 1332, second flanging; Z2, second fixing column; L2, second connecting portion; K, connecting hole;

[0038] 140, arc outlet side;

[0039] 150, partition; 151, ventilation hole; 152, third card slot; 153, fourth card slot;

[0040] 160, arc ignition plate. Detailed implementation manners

[0041] 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.

[0042] 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 description of the application herein 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 description and claims of this application and the drawings are intended to cover non-exclusive inclusion.

[0043] References herein to "embodiments" mean 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 is not necessarily referring to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with 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.

[0044] The term "and / or" herein is merely a description of the relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can mean: there is A, there is both A and B, or there is B. Additionally, the character " / " herein generally indicates an "or" relationship between the associated objects before and after.

[0045] The directional terms appearing in the following description are 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", "lateral", "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 cannot be construed as a limitation of this application.

[0046] In addition, terms such as "first", "second", etc. in the description and claims of this application or the above-mentioned drawings are used to distinguish different objects and are not used to describe a specific order, and may explicitly or implicitly include one or more of such features.

[0047] 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).

[0048] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "linkage" should be understood in a broad sense. For example, the "connection" or "linkage" 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.

[0049] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0050] Figure 1 A schematic diagram of a combined structure of an arc extinguishing chamber provided for an embodiment of the present application. The present application provides a circuit breaker, and the circuit breaker includes a housing and an arc extinguishing chamber 100 as Figure 1 shown.

[0051] The housing includes a base and a middle cover that cover each other. An installation space may be formed between the base and the middle cover that cover each other, and structural components such as a contact system and the arc extinguishing chamber 100 are installed in the installation space.

[0052] The structure of the arc extinguishing chamber 100 provided by the present application will be introduced in detail below with reference to the accompanying drawings.

[0053] Figure 2 An exploded view of an arc extinguishing chamber provided for an embodiment of the present application. As Figure 1 and Figure 2 shown, the arc extinguishing chamber 100 includes a side plate assembly 110, a white cardboard 120, and a protective cover 130. The side plate assembly 110 includes an arc extinguishing cavity, and the arc extinguishing cavity includes an arc outlet side 140. The white cardboard 120 is located on the arc outlet side 140. The protective cover 130 is connected to one side of the side plate assembly 110 close to the middle cover, and the protective cover 130 shields one side of the white cardboard 120 close to the middle cover. One side of the white cardboard 120 away from the middle cover is connected to the side plate assembly 110, and one side of the white cardboard 120 close to the middle cover is connected to the protective cover 130, so that the side plate assembly 110, the protective cover 130, and the white cardboard 120 are assembled into a whole.

[0054] The side plate assembly 110 includes a first side plate 111 and a second side plate 112 that are opposite in position. The first side plate 111 and the second side plate 112 are spaced apart, and the space formed between the first side plate 111 and the second side plate 112 is the arc extinguishing cavity of the side plate assembly 110.

[0055] The moving contact of the circuit breaker includes a connection end and a contact end. The connection end is usually located outside the arc extinguishing chamber and is rotatably connected to the base. The contact end is provided with a moving contact, and the contact end is usually located inside the arc extinguishing chamber and can move inside the arc extinguishing chamber. The arc extinguishing chamber includes an arc outlet side 140, and the arc outlet side 140 is the side of the arc extinguishing chamber away from the connection end of the moving contact. When the arc extinguishes inside the arc extinguishing chamber, a large amount of gas is generated, and these gases can be discharged from the arc outlet side 140. Among them, the direction in which the gas discharges from the arc extinguishing chamber is generally consistent with the direction from the connection end to the contact end.

[0056] The white cardboard 120 is a solid thin plate structure. The reason for setting the white cardboard 120 as solid is that when the white cardboard 120 is arranged on the arc outlet side 140, it can block the arc outlet side 140 and reduce the possibility of impurities such as dust entering the arc extinguishing chamber 100 from the arc outlet side 140.

[0057] The white cardboard 120 is relatively soft and has toughness, and will deform to varying degrees under the action of external force. When the white cardboard 120 is arranged on the arc outlet side 140, when the gas discharges from the arc outlet side 140, it will impact the white cardboard 120, causing the white cardboard 120 to bend and deform. After deformation, a gap is generated between the white cardboard 120 and the side plate assembly 110, and the gas in the arc extinguishing chamber 100 can be discharged from this gap.

[0058] Therefore, arranging the white cardboard 120 on the arc outlet side 140 can block impurities from entering the arc extinguishing chamber 100 from the arc outlet side 140 while not affecting the discharge of the gas in the arc extinguishing chamber 100.

[0059] The fixed position of the white cardboard 120 on the arc outlet side 140 includes the fixation of the side of the white cardboard 120 away from the middle cover and also includes the fixation of the side of the white cardboard 120 close to the middle cover. Specifically, the side of the white cardboard 120 away from the middle cover is connected to the side plate assembly 110, and the side of the white cardboard 120 close to the middle cover is connected to the protective cover 130. The connection method between the white cardboard 120 and the side plate assembly 110, as well as the connection method between the white cardboard 120 and the protective cover 130, will be introduced in detail later and will not be elaborated here for the time being.

[0060] The protective cover 130 can be connected to the side of the side plate assembly 110 close to the middle cover by means of plugging, clamping, screw connection, etc., and the application does not limit the connection method between the protective cover 130 and the side plate assembly 110.

[0061] The protective cover 130 can be at least partially located on the side of the white cardboard 120 close to the middle cover to block the side of the white cardboard 120 close to the middle cover, thereby reducing the possibility of the white cardboard 120 being damaged by touching the middle cover when the arc extinguishing chamber 100 is installed into the housing.

[0062] The white cardboard 120 is located on the arc-out side 140. One side of the white cardboard 120 away from the middle cover is connected to the side plate assembly 110, and one side of the white cardboard 120 close to the middle cover is connected to the protective cover 130. The protective cover 130 is connected to one side of the side plate assembly 110 close to the middle cover, so that the side plate assembly 110, the protective cover 130 and the white cardboard 120 can be assembled into a whole.

[0063] In the embodiment of the present application, the side plate assembly 110, the protective cover 130 and the white cardboard 120 are assembled into a whole, so that after the arc extinguishing chamber 100 is assembled outside the housing of the circuit breaker, it can be integrally placed into the base, and then the middle cover is covered with the base to realize the installation of the whole arc extinguishing chamber 100 inside the housing, without installing the side plate assembly 110, the protective cover 130 and the white cardboard 120 into the narrow housing one by one. In this way, the difficulty of installing the arc extinguishing chamber 100 into the housing is reduced, and the installation efficiency of the arc extinguishing chamber 100 is improved.

[0064] In addition, the protective cover 130 is connected to one side of the side plate assembly 110 close to the middle cover, and the protective cover 130 shields one side of the white cardboard 120 close to the middle cover, so that after the whole arc extinguishing chamber 100 is placed into the base and the middle cover is covered, the protective cover 130 can separate the white cardboard 120 from the middle cover. In this way, the white cardboard 120 will not contact the middle cover and will not be damaged by the touch of the middle cover. Therefore, the possibility of damage to the internal structural parts of the arc extinguishing chamber 100 during the installation of the arc extinguishing chamber 100 into the housing can be reduced.

[0065] Figure 3 It is a schematic diagram of a combined structure of a protective cover provided by an embodiment of the present application. Combining Figures 1 to 3 , an installation groove 131 is provided on the side of the protective cover 130 facing the white cardboard 120, and one side of the white cardboard 120 close to the middle cover is located in the installation groove 131.

[0066] The installation groove 131 can be a groove directly provided on the side of the protective cover 130 facing the white cardboard 120. Or, two position-opposite limiting plates can be provided at intervals on the side of the protective cover 130 facing the white cardboard 120, and the installation groove 131 can be a groove formed between the two limiting plates.

[0067] One side of the white cardboard 120 close to the middle cover is located in the installation groove 131, so that when the gas in the arc extinguishing chamber 100 impacts the white cardboard 120 and discharges from the gap between the white cardboard 120 and the side plate assembly 110, a groove wall of the installation groove 131 far from the arc extinguishing cavity can abut against the white cardboard 120 and limit the position of one side of the white cardboard 120 close to the middle cover. Through the cooperation between the white cardboard 120 and the installation groove 131, the possibility of one side of the white cardboard 120 close to the middle cover slipping out of the installation groove 131 is reduced, so as to facilitate ensuring that the white cardboard 120 can play its role well.

[0068] Regarding the structure of the protective cover 130, in some embodiments, the protective cover 130 may be an integral structure.

[0069] In other embodiments, the protective cover 130 may be a split structure. Exemplarily, Figure 4 FIG. is an exploded view of a protective cover provided by an embodiment of the present application from one perspective, Figure 5 FIG. is an exploded view of a protective cover provided by an embodiment of the present application from another perspective. Combining Figures 1 to 5 , the protective cover 130 may include a first cover body 132 and a second cover body 133. The first cover body 132 and the second cover body 133 are spliced side by side, and both the first cover body 132 and the second cover body 133 are connected to the side plate assembly 110. The installation groove 131 includes a first groove 1311 and a second groove 1312. The first groove 1311 is provided in the first cover body 132, and the second groove 1312 is provided in the second cover body 133. The part of the white cardboard 120 close to the first cover body 132 is located in the first groove 1311, and the part of the white cardboard 120 close to the second cover body 133 is located in the second groove 1312.

[0070] The arrangement direction of the first cover body 132 and the second cover body 133 is the same as the arrangement direction of the first side plate 111 and the second side plate 112.

[0071] Please refer to Figure 1 、 Figure 2 、 Figure 4 and Figure 5 , the first cover body 132 includes a first shielding plate 1321 and a first flanging 1322 that are connected to each other. The first shielding plate 1321 is located on the side of the arc extinguishing chamber close to the middle cover, and the first flanging 1322 is connected to the side of the first side plate 111 away from the second side plate 112.

[0072] The first shielding plate 1321 and the first flanging 1322 can be separately formed and then assembled to form the first cover body 132. Alternatively, the first shielding plate 1321 and the first flanging 1322 can be integrally formed to form the first cover body 132 to save the assembly process.

[0073] The first shielding plate 1321 is located on the side of the arc extinguishing chamber close to the middle cover, and can shield the part of the side of the arc extinguishing chamber close to the middle cover that is relatively close to the first side plate 111. The first flanging 1322 is located on the side of the first side plate 111 away from the second side plate 112, and the first flanging 1322 and the first side plate 111 may have an overlapping part, so that the first flanging 1322 can be connected to the side of the first side plate 111 away from the second side plate 112, thereby realizing the connection between the first cover body 132 and the side plate assembly 110.

[0074] Please continue to refer to Figure 1 、 Figure 2 、 Figure 4 andFigure 5 The second cover 133 includes a second baffle 1331 and a second flange 1332 connected to each other. The second baffle 1331 is located on the side of the arc extinguishing chamber close to the middle cover, and the second flange 1332 is connected to the side of the second side plate 112 away from the first side plate 111.

[0075] The second baffle 1331 and the second flange 1332 can be separately formed and then assembled to form the second cover 133. Alternatively, the second baffle 1331 and the second flange 1332 can be integrally formed to form the second cover 133, so as to save the assembly process.

[0076] The second baffle 1331 is located on the side of the arc extinguishing chamber close to the middle cover, and can shield the part of the side of the arc extinguishing chamber close to the middle cover that is relatively close to the second side plate 112. The second flange 1332 is located on the side of the second side plate 112 away from the first side plate 111, and the second flange 1332 and the second side plate 112 can have overlapping parts, so that the second flange 1332 can be connected to the side of the second side plate 112 away from the first side plate 111, thereby realizing the connection between the second cover 133 and the side plate assembly 110.

[0077] In some embodiments, as Figure 4 and Figure 5 shown, the first baffle 1321 can be provided with a first exhaust hole K1. And / or, the second baffle 1331 can be provided with a second exhaust hole K2.

[0078] The number of the first exhaust hole K1 and the second exhaust hole K2 can be multiple, and the shapes of the first exhaust hole K1 and the second exhaust hole K2 can be any shape such as circular, square, etc.

[0079] By providing the first exhaust hole K1 on the first baffle 1321, part of the gas in the arc extinguishing chamber can be discharged from the first exhaust hole K1, reducing the possibility of damage to the structure of the arc extinguishing chamber 100 due to excessive air pressure in the arc extinguishing chamber. By providing the second exhaust hole K2 on the second baffle 1331, part of the gas in the arc extinguishing chamber can be discharged from the second exhaust hole K2, and it can also reduce the possibility of damage to the structure of the arc extinguishing chamber 100 due to excessive air pressure in the arc extinguishing chamber.

[0080] Based on Figures 3 to 5 the structure of the protective cover 130 shown, the installation groove 131 includes a first groove 1311 and a second groove 1312. The first groove 1311 can be provided on the first cover 132, and can be provided on the first baffle 1321 of the first cover 132. Correspondingly, the second groove 1312 can be provided on the second cover 133, and can be provided on the second baffle 1331 of the second cover 133.

[0081] In this way, the part of the white cardboard 120 close to the first cover 132 can be located in the first groove 1311, and the part of the white cardboard 120 close to the second cover 133 can be located in the second groove 1312.

[0082] In this embodiment, the first cover 132 and the second cover 133 are spliced side by side to form the protective cover 130, which can reduce the forming and processing difficulty of the protective cover 130 and facilitate the improvement of the processing efficiency of the protective cover 130. The first cover 132 is provided with the first groove 1311, so that the part of the white cardboard 120 close to the first cover 132 can be located in the first groove 1311, and the white cardboard 120 is limited by the first groove 1311. Similarly, the second cover 133 is provided with the second groove 1312, so that the part of the white cardboard 120 close to the second cover 133 can be located in the second groove 1312, and the white cardboard 120 is limited by the second groove 1312.

[0083] Among them, the first cover 132 is set to include the first shielding plate 1321 and the first flanging 1322, so that the first cover 132 can not only shield the side of the arc extinguishing chamber close to the middle cover through the first shielding plate 1321, but also realize the connection between the first cover 132 and the first side plate 111 through the first flanging 1322. While ensuring the shielding function of the first cover 132, it is convenient to connect the first cover 132 with the side plate assembly 110. In addition, the first shielding plate 1321 is provided with the first groove 1311, which is convenient to provide an installation position for the side of the white cardboard 120 close to the middle cover and realize the connection between the white cardboard 120 and the protective cover 130.

[0084] Similarly, the second cover 133 is set to include the second shielding plate 1331 and the second flanging 1332, so that the second cover 133 can not only shield the side of the arc extinguishing chamber close to the middle cover through the second shielding plate 1331, but also realize the connection between the second cover 133 and the second side plate 112 through the second flanging 1332. While ensuring the shielding function of the second cover 133, it is convenient to connect the second cover 133 with the side plate assembly 110. In addition, the second shielding plate 1331 is provided with the second groove 1312, which is convenient to provide an installation position for the side of the white cardboard 120 close to the middle cover and realize the connection between the white cardboard 120 and the protective cover 130.

[0085] Please continue to refer to Figure 4 and Figure 5, in some embodiments, a first fixing post Z1 is provided on one side of the first flanging 1322 facing the second flanging 1332, and a second fixing post Z2 is provided on one side of the second flanging 1332 facing the first flanging 1322. One end of the first fixing post Z1 facing the second fixing post Z2 is provided with a first connecting portion L1, and one end of the second fixing post Z2 facing the first fixing post Z1 is provided with a second connecting portion L2. The end of the first fixing post Z1 provided with the first connecting portion L1 passes through the first side plate 111 and is located in the arc extinguishing chamber, and the end of the second fixing post Z2 provided with the second connecting portion L2 passes through the second side plate 112 and is located in the arc extinguishing chamber, and the first connecting portion L1 is connected to the second connecting portion L2.

[0086] The first fixing post Z1 and the second fixing post Z2 can be any columnar shape such as cylindrical, triangular prism-shaped, or quadrangular prism-shaped.

[0087] One of the first connecting portion L1 and the second connecting portion L2 can be a convex structure, and the other of the first connecting portion L1 and the second connecting portion L2 can be a groove structure. Figure 4 and Figure 5 As shown in, the first connecting portion L1 is a convex structure and the second connecting portion L2 is a groove structure.

[0088] The first connecting portion L1 and the second connecting portion L2 are inserted into each other.

[0089] In some possible cases, an interference connection can be provided between the first connecting portion L1 and the second connecting portion L2 to achieve the connection between the first connecting portion L1 and the second connecting portion L2.

[0090] In some other possible cases, such as Figure 2 、 Figure 4 and Figure 5 shown, the first side plate 111 can be provided with a first through hole 1111, the second side plate 112 can be provided with a second through hole 1121, the end of the first fixing post Z1 provided with the first connecting portion L1 can pass through the first through hole 1111 and be located in the arc extinguishing chamber, and the end of the second fixing post Z2 provided with the second connecting portion L2 can pass through the second through hole 1121 and be located in the arc extinguishing chamber.

[0091] Both the first connecting portion L1 and the second connecting portion L2 can be provided with connecting holes K, and the arc extinguishing chamber 100 can further include fasteners such as screws. The fastener can pass through the first through hole 1111 or the second through hole 1121 to connect the connecting hole K on the first connecting portion L1 and the connecting hole K on the second connecting portion L2 to achieve the connection between the first connecting portion L1 and the second connecting portion L2.

[0092] The embodiments of the present application do not limit the manner of realizing the connection between the first connecting portion L1 and the second connecting portion L2.

[0093] The structure of the protective cover 130 and the connection between the white cardboard 120 and the protective cover 130 have been introduced above. Next, the connection between the white cardboard 120 and the side plate assembly 110 will be introduced with reference to the accompanying drawings.

[0094] Please continue to refer to Figure 2 , the first side plate 111 is provided with a first extension plate 1112, the first extension plate 1112 is provided with a first slot 1113, and the part of the white cardboard 120 opposite to the first slot 1113 is inserted into the first slot 1113. The second side plate 112 is provided with a second extension plate 1122, the second extension plate 1122 is provided with a second slot 1123, and the part of the white cardboard 120 opposite to the second slot 1123 is inserted into the second slot 1123.

[0095] The first extension plate 1112 extends away from the arc extinguishing chamber at the part of the first side plate 111 close to the base, and the first slot 1113 is arranged on the side of the first extension plate 1112 facing the middle cover. In this way, when the white cardboard 120 is located at the arc outlet side 140, the part of the white cardboard 120 opposite to the first slot 1113 can be inserted into the first slot 1113 to realize the connection between the white cardboard 120 and the first side plate 111.

[0096] Similarly, the second extension plate 1122 extends away from the arc extinguishing chamber at the part of the second side plate 112 close to the base, and the second slot 1123 is arranged on the side of the second extension plate 1122 facing the middle cover. In this way, when the white cardboard 120 is located at the arc outlet side 140, the part of the white cardboard 120 opposite to the second slot 1123 can be inserted into the second slot 1123 to realize the connection between the white cardboard 120 and the second side plate 112.

[0097] In this embodiment, the part of the white cardboard 120 opposite to the first slot 1113 is inserted into the first slot 1113, which can realize the connection between the white cardboard 120 and the first side plate 111. The part of the white cardboard 120 opposite to the second slot 1123 is inserted into the second slot 1123, which can realize the connection between the white cardboard 120 and the second side plate 112. In this way, the first slot 1113 and the second slot 1123 can cooperate to fix the position of the white cardboard 120, so as to connect the white cardboard 120 with the side plate assembly 110 and reduce the possibility that the side of the white cardboard 120 far from the middle cover moves in the direction of gas discharging from the arc extinguishing chamber.

[0098] Figure 6 It is a schematic structural diagram of a white cardboard provided by an embodiment of the present application. Further, as Figure 2 and Figure 6As shown, a first card slot 121 may be provided at a portion of the white cardboard 120 opposite to the first slot 1113, and the first extension plate 1112 is snap-fitted with the first card slot 121. And / or, a second card slot 122 may be provided at a portion of the white cardboard 120 opposite to the second slot 1123, and the second extension plate 1122 is snap-fitted with the second card slot 122.

[0099] The width of the first card slot 121 may be slightly larger than the thickness of the first extension plate 1112, so that when the white cardboard 120 is inserted into the first slot 1113, the first extension plate 1112 can be tightly snap-fitted with the first card slot 121. Wherein, the width of the first card slot 121 refers to the dimension of the first card slot 121 in the arrangement direction of the first side plate 111 and the second side plate 112.

[0100] Similarly, the width of the second card slot 122 may be larger than the thickness of the second extension plate 1122, so that when the white cardboard 120 is inserted into the second slot 1123, the second extension plate 1122 can be tightly snap-fitted with the second card slot 122. Wherein, the width of the second card slot 122 refers to the dimension of the second card slot 122 in the arrangement direction of the first side plate 111 and the second side plate 112.

[0101] In this embodiment, the first extension plate 1112 is snap-fitted with the first card slot 121, which can realize the connection between the white cardboard 120 and the first side plate 111. The second extension plate 1122 is snap-fitted with the second card slot 122, which can realize the connection between the white cardboard 120 and the second side plate 112. Thus, the first card slot 121 and the second card slot 122 can further cooperate to fix the position of the white cardboard 120, so as to connect the white cardboard 120 with the side plate assembly 110, and reduce the possibility that the side of the white cardboard 120 far from the middle cover moves in the arrangement direction of the first side plate 111 and the second side plate 112.

[0102] Figure 7 As shown in the schematic structural diagram of a partition provided by an embodiment of the present application, Figure 1 、 Figure 2 and Figure 7 shown, the arc extinguishing chamber 100 may further include a partition 150. The partition 150 is located on the arc outlet side 140, and the partition 150 is located on the side of the white cardboard 120 close to the arc extinguishing cavity. The partition 150 is provided with ventilation holes 151, and the ventilation holes 151 communicate with the arc extinguishing cavity. The side of the partition 150 far from the middle cover is connected to the side plate assembly 110, and the side of the partition 150 close to the middle cover is connected to the protective cover 130.

[0103] The partition 150 is closer to the arc extinguishing cavity than the white cardboard 120. The partition 150 is provided with ventilation holes 151 at a portion close to the middle cover. The number of the ventilation holes 151 may be multiple, and the shape of the ventilation holes 151 may be any shape such as square, circular, etc. The embodiment of the present application does not limit this. Exemplarily, Figure 7The shown partition plate 150 is provided with six ventilation holes 151, and the shape of the ventilation holes 151 is a runway shape.

[0104] The ventilation holes 151 penetrate through the partition plate 150 along the direction of the gas discharging from the arc extinguishing chamber, so that the ventilation holes 151 can communicate with the arc extinguishing chamber. In this way, the gas in the arc extinguishing chamber can be discharged through the ventilation holes 151.

[0105] Similar to the fixed position of the white cardboard 120 on the arc outlet side 140, the fixed position of the partition plate 150 on the arc outlet side 140 includes the fixation of the side of the partition plate 150 away from the middle cover, and also includes the fixation of the side of the partition plate 150 close to the middle cover. Specifically, the side of the partition plate 150 close to the middle cover can be located in the first groove 1311 and the second groove 1312, so that the side of the partition plate 150 close to the middle cover is connected to the protective cover 130. The side of the partition plate 150 away from the middle cover is inserted into the first slot 1113 and the second slot 1123, so that the side of the partition plate 150 away from the middle cover is connected to the side plate assembly 110.

[0106] The side of the partition plate 150 close to the middle cover is located in the first groove 1311 and the second groove 1312, so that the first groove 1311 and the second groove 1312 can limit the side of the partition plate 150 close to the middle cover, reducing the possibility of the side of the partition plate 150 close to the middle cover moving in the direction of the gas discharging from the arc extinguishing chamber. The side of the partition plate 150 away from the middle cover is located in the first slot 1113 and the second slot 1123, so that the first slot 1113 and the second slot 1123 can limit the side of the partition plate 150 away from the middle cover, reducing the possibility of the side of the partition plate 150 away from the middle cover moving in the direction of the gas discharging from the arc extinguishing chamber.

[0107] Please continue to refer to Figure 2 and Figure 7 , a third card slot 152 can be provided at the part of the partition plate 150 opposite to the first slot 1113, and the first extension plate 1112 is engaged with the third card slot 152. And / or, a fourth card slot 153 can be provided at the part of the partition plate 150 opposite to the second slot 1123, and the second extension plate 1122 is engaged with the fourth card slot 153.

[0108] The structure of the third card slot 152 is similar to the structure of the first card slot 121. Therefore, the description of the third card slot 152 can refer to the description of the first card slot 121, and will not be elaborated here.

[0109] Similarly, the structure of the fourth card slot 153 is similar to the structure of the second card slot 122. Therefore, the description of the fourth card slot 153 can refer to the description of the second card slot 122, and will not be elaborated here.

[0110] The first extension plate 1112 is engaged with the third card slot 152, enabling the connection between the partition plate 150 and the first side plate 111. The second extension plate 1122 is engaged with the fourth card slot 153, enabling the connection between the partition plate 150 and the second side plate 112. In this way, the third card slot 152 and the fourth card slot 153 can further cooperate to fix the position of the partition plate 150, so as to connect the partition plate 150 with the side plate assembly 110, reducing the possibility of the side of the partition plate 150 away from the middle cover moving in the arrangement direction of the first side plate 111 and the second side plate 112.

[0111] Please continue to refer to Figure 2 , in some embodiments, the arc extinguishing chamber 100 may further include an arc ignition plate 160. The arc ignition plate 160 is disposed on the side of the protective cover 130 facing the base. Plug blocks may be provided on both sides of the arc ignition plate 160 in the arrangement direction of the first side plate 111 and the second side plate 112, so as to be inserted into the first side plate 111 and the second side plate 112 through the plug blocks.

[0112] By providing the arc ignition plate 160 in the arc extinguishing chamber 100, the arc generated when the moving contact and the static contact are separated can be introduced into the arc extinguishing cavity through the arc ignition plate 160, facilitating the extinguishing of the arc in the arc extinguishing cavity and improving the arc extinguishing efficiency of the arc extinguishing chamber 100.

[0113] Based on the above description of the structure of the arc extinguishing chamber 100 in the present application, when the arc extinguishing chamber 100 is installed in the housing of the circuit breaker, the side of the white cardboard 120 and the partition plate 150 away from the middle cover can be first inserted into the first slot 1113 and the second slot 1123, and at the same time, the first card slot 121 and the third card slot 152 are engaged with the first extension plate 1112, and the second card slot 122 and the fourth card slot 153 are engaged with the second extension plate 1122, so as to realize the installation of the white cardboard 120 and the partition plate 150 on the side plate assembly 110.

[0114] Then, the end of the first fixing column Z1 provided with the first connecting portion L1 passes through the first side plate 111 and is located in the arc extinguishing cavity, and the end of the second fixing column Z2 provided with the second connecting portion L2 passes through the second side plate 112 and is located in the arc extinguishing cavity, so that the protective cover 130 is placed on the side of the side plate assembly 110 close to the middle cover.

[0115] After that, the first connecting portion L1 and the second connecting portion L2 are connected by fasteners to realize the connection between the protective cover 130 and the side plate assembly 110. And the sides of the white cardboard 120 and the partition plate 150 close to the middle cover are located in the installation groove 131.

[0116] After the above steps, the side plate assembly 110, the white cardboard 120 and the protective cover 130 can be assembled into a whole. Then, the assembled arc extinguishing chamber 100 as a whole is placed into the base, and then the middle cover is covered with the base to realize the installation of the arc extinguishing chamber 100 as a whole in the housing.

[0117] Since in this application, the side plate assembly 110, the white cardboard 120 and the protective cover 130 can be assembled into a whole and then installed on the base, instead of installing the side plate assembly 110, the protective cover 130 and the white cardboard 120 one by one into the narrow housing, the difficulty of installing the arc extinguishing chamber 100 into the housing can be reduced, the possibility of repeated rework during installation can be reduced, and it is convenient to improve the installation efficiency of the arc extinguishing chamber 100.

[0118] In addition, the protective cover 130 is connected to the side of the side plate assembly 110 close to the middle cover, and the protective cover 130 shields the side of the white cardboard 120 close to the middle cover, so that after the arc extinguishing chamber 100 as a whole is placed into the base and the middle cover is covered, the protective cover 130 can separate the white cardboard 120 from the middle cover. In this way, the white cardboard 120 will not contact the middle cover and will not be damaged by the touch of the middle cover. Therefore, the possibility of damage to the structural parts in the arc extinguishing chamber 100 during the installation of the arc extinguishing chamber 100 into the housing can be reduced.

Claims

1. An arc extinguishing chamber, applied to a circuit breaker, the circuit breaker comprising a middle cover, characterized in that: The arc extinguishing chamber comprises: A side plate assembly, comprising an arc extinguishing chamber, wherein the arc extinguishing chamber comprises an arc-exiting side; A white paperboard, located at the arc exit side; A protective cover connected to a side of the side panel assembly close to the middle cover, and the protective cover shields a side of the white paper board close to the middle cover; The side of the white paperboard away from the middle cover is connected to the side panel assembly, and the side of the white paperboard close to the middle cover is connected to the protective cover, so that the side panel assembly, the protective cover and the white paperboard are assembled into a whole.

2. The arc extinguishing chamber according to claim 1, characterized in that: A mounting groove is provided on a side of the protective cover facing the white paper board, and a side of the white paper board close to the middle cover is located in the mounting groove.

3. The arc extinguishing chamber according to claim 2, characterized in that: The protective cover comprises a first cover body and a second cover body, the first cover body and the second cover body are spliced ​​side by side, and the first cover body and the second cover body are both connected to the side plate assembly; The mounting groove comprises a first groove and a second groove, the first groove is provided on the first cover body, and the second groove is provided on the second cover body; The portion of the white paperboard close to the first cover body is located in the first groove, and the portion of the white paperboard close to the second cover body is located in the second groove.

4. The arc extinguishing chamber according to claim 3, characterized in that: The side plate assembly comprises a first side plate and a second side plate, the first side plate and the second side plate are arranged at an interval, and the arc extinguishing chamber is formed between the first side plate and the second side plate; The first cover body comprises a first shielding plate and a first flange connected to each other, the first shielding plate is located on a side of the arc extinguishing chamber close to the middle cover, and the first flange is connected to a side of the first side plate away from the second side plate; The second cover body comprises a second shielding plate and a second flange connected to each other, the second shielding plate is located on a side of the arc extinguishing chamber close to the middle cover, and the second flange is connected to a side of the second side plate away from the first side plate; The first groove is provided on the first shielding plate, and the second groove is provided on the second shielding plate.

5. The arc extinguishing chamber according to claim 4, characterized in that: A first fixing column is provided on a side of the first flange facing the second flange, and a second fixing column is provided on a side of the second flange facing the first flange; A first connection portion is provided at one end of the first fixing column facing the second fixing column, and a second connection portion is provided at one end of the second fixing column facing the first fixing column; The first fixing column is provided with an end of the first connecting part passing through the first side plate and located in the arc extinguishing cavity, the second fixing column is provided with an end of the second connecting part passing through the second side plate and located in the arc extinguishing cavity, and the first connecting part is connected to the second connecting part.

6. The arc extinguishing chamber according to claim 4, characterized in that: The first side plate is provided with a first extension plate, the first extension plate is provided with a first slot, and the portion of the white paperboard opposite to the first slot is inserted into the first slot; The second side plate is provided with a second extension plate, the second extension plate is provided with a second slot, and the portion of the white paperboard opposite to the second slot is plugged into the second slot.

7. The arc extinguishing chamber according to claim 6, characterized in that: A first card slot is provided at a portion of the white paperboard opposite to the first slot, and the first extension plate is engaged with the first card slot; and / or, A second card slot is provided at a portion of the white paper board opposite to the second slot, and the second extension plate is card-connected with the second card slot.

8. The arc extinguishing chamber according to claim 6 or 7, characterized in that: The arc extinguishing chamber further comprises a partition, which is located at the arc-exiting side, and the partition is located at a side of the white paperboard close to the arc extinguishing chamber; The partition plate is provided with an air hole, and the air hole is communicated with the arc extinguishing chamber; The side of the partition away from the middle cover is connected to the side plate assembly, and the side of the partition close to the middle cover is connected to the protective cover.

9. The arc extinguishing chamber according to claim 8, characterized in that: The side of the partition close to the middle cover is located in the first slot and the second slot, and the side of the partition away from the middle cover is plugged into the first slot and the second slot.

10. A circuit breaker, characterized in that: The arc extinguishing chamber comprises the arc extinguishing chamber as claimed in any one of claims 1 to 9.

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