Arc extinguish chamber and circuit breaker

Abstract

The utility model provides an arc extinguish chamber and a circuit breaker, and belongs to the technical field of electrical equipment. The arc extinguish chamber provided by the utility model comprises a base, an arc extinguish grid plate and an arc extinguish cover. The base is provided with an arc extinguishing cavity, and a slot is arranged in the arc extinguishing cavity. And the arc extinguishing grid plates are positioned in the arc extinguishing cavity and are inserted into the slots. The arc extinguishing chamber is covered with the arc extinguishing chamber, and the arc extinguishing chamber is detachably connected with the base. According to the circuit breaker, the slots are formed in the arc extinguishing cavity, and when the arc extinguishing grid sheets are mounted in the arc extinguishing chamber, the arc extinguishing grid sheets can be inserted into the slots, so that the arc extinguishing grid sheets and the base are detachably connected, the difficulty of dismounting and replacing parts in the arc extinguishing chamber can be reduced, and the operation and maintenance cost of the circuit breaker is reduced. When the arc extinguishing chamber is detachably connected with the base, parts in the arc extinguishing chamber can be detached and replaced by taking down the arc extinguishing chamber from the base, so that the difficulty of detaching and replacing the parts in the arc extinguishing chamber can be further reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical equipment, in particular to an arc-extinguishing chamber and a circuit breaker. BACKGROUND

[0002] The arc-extinguishing chamber of the circuit breaker is a device for absorbing, consuming and transferring arc energy when the main circuit of the circuit breaker is broken. When an abnormal large current occurs in the main circuit of the circuit breaker, the operating mechanism will execute the command of the electronic trip to separate the moving contact and the stationary contact. During the separation process, strong light discharge will occur between the moving contact and the stationary contact, and the arc will continue to burn even after the moving contact and the stationary contact are separated by a certain distance. At this time, the arc and excess energy need to be transferred into the arc-extinguishing chamber for absorption and consumption, so as to achieve the purpose of completely breaking the circuit. Therefore, the arc-extinguishing chamber is crucial to the stable operation of the circuit breaker.

[0003] During the use of the circuit breaker in its entire life cycle, the number of times of breaking short-circuit current can reach several or dozens of times, and the number of times of breaking overload current can reach several hundred or several thousand times. Most of the arcs generated during this period need to be absorbed and consumed by the arc-extinguishing chamber, so that the arc-extinguishing chamber needs to withstand multiple arc erosions. After the arc-extinguishing chamber withstands multiple arc erosions, the internal parts of the arc-extinguishing chamber will be damaged to different degrees. Therefore, how to efficiently disassemble the arc-extinguishing chamber to facilitate the replacement of the internal parts of the arc-extinguishing chamber is crucial. CONTENT OF THE UTILITY MODEL

[0004] The present application provides an arc-extinguishing chamber and a circuit breaker to facilitate the disassembly and replacement of the internal parts of the arc-extinguishing chamber.

[0005] In a first aspect, the present application provides an arc-extinguishing chamber, which comprises a base, arc-extinguishing fins and an arc-extinguishing cover. The base has an arc-extinguishing cavity, and a slot is arranged in the arc-extinguishing cavity. The arc-extinguishing fins are arranged in the arc-extinguishing cavity and are inserted into the slot. The arc-extinguishing cover covers the arc-extinguishing cavity and is detachably connected to the base.

[0006] According to the above-mentioned scheme, the slot is arranged in the arc-extinguishing cavity. When the arc-extinguishing fins are installed in the arc-extinguishing chamber, the arc-extinguishing fins can be inserted into the slot, so that the arc-extinguishing fins and the base are detachably connected. In this way, when the arc-extinguishing fins are damaged, the arc-extinguishing fins can be directly pulled out of the base for disassembly and replacement, which reduces the difficulty of disassembly and replacement of the internal parts of the arc-extinguishing chamber and reduces the operation and maintenance cost of the circuit breaker. When the arc-extinguishing cover and the base are detachably connected, the arc-extinguishing cover can be removed from the base to disassemble and replace the internal parts of the arc-extinguishing chamber. In this way, the difficulty of disassembly and replacement of the internal parts of the arc-extinguishing chamber can be further reduced.

[0007] In a possible design, the cavity wall of the arc extinguishing cavity includes a first arc extinguishing wall and a second arc extinguishing wall opposite to each other. The slot includes a first slot and a second slot, the first slot is located on the first arc extinguishing wall, and the second slot is located on the second arc extinguishing wall.

[0008] According to the above scheme, the two side walls of the arc extinguishing cavity are configured as the first arc extinguishing wall and the second arc extinguishing wall, the first slot is arranged on the first arc extinguishing wall, and the second slot is arranged on the second arc extinguishing wall, so that the installation of the arc extinguishing grid is more convenient. When the first slot and the second slot are opposite to each other, the arc extinguishing grid can be arranged in parallel with the other two side walls of the arc extinguishing cavity after being inserted into the arc extinguishing cavity, so that the space in the arc extinguishing cavity can be saved. Not only can more arc extinguishing grids be placed in the arc extinguishing cavity, but also the probability of the problem that the arc extinguishing grid is difficult to install due to the misalignment of the first slot and the second slot can be reduced.

[0009] In a possible design, the bottom of the first slot is a first limiting wall, and the bottom of the second slot is a second limiting wall. The arc extinguishing grid includes a first limiting block and a second limiting block, the first limiting block is in abutment with the first limiting wall, and the second limiting block is in abutment with the second limiting wall.

[0010] According to the above scheme, the first limiting wall and the second limiting wall can limit the installation of the arc extinguishing grid. The arc extinguishing grid and the base are in a plug-in relationship, and the arc extinguishing grid can be limited to reduce the possibility of the problem that the arc extinguishing grid falls from the base during use. When the first limiting block is in abutment with the first limiting wall and the second limiting block is in abutment with the second limiting wall, it indicates that the installation of the arc extinguishing grid is completed. Therefore, the first limiting wall and the second limiting wall can also play a prompting role during the installation of the arc extinguishing grid.

[0011] In a possible design, the base is provided with a sliding groove in a first direction, and the arc cover is provided with a sliding block in the first direction. The sliding block is located in the sliding groove, and the side wall of the sliding block is in contact with the groove wall of the sliding groove. The first direction is the installation direction of the arc cover towards the base.

[0012] According to the above scheme, when the arc cover is installed on the base, the sliding block can be located in the sliding groove, and the side wall of the sliding block can be in contact with the groove wall of the sliding groove, so that the arc cover can be limited in the installation direction of the arc extinguishing grid of the arc extinguishing cavity. In addition, the inner wall of the arc cover can also be in abutment with the side wall of the base, so that the arc cover cannot continue to slide along the sliding groove, thereby limiting the arc cover in the installation direction of the arc cover towards the base. The sliding block and the sliding groove cooperate with each other, which is convenient whether in the process of installing the arc cover towards the base or in the process of disassembling the arc cover from the base.

[0013] In a possible design, the chute is provided with a guide opening, and the sliding block is provided with a guide surface. The guide opening cooperates with the guide surface to guide the base to guide the arc-extinguishing cover.

[0014] According to the above scheme, the guide opening can guide the sliding block, thereby guiding the installation of the arc-extinguishing cover. In this way, the installation difficulty of the arc-extinguishing cover can be reduced, and the installation cost and operation and maintenance cost of the arc-extinguishing chamber can be saved.

[0015] In a possible design, the base is provided with a support table, and the support table is provided with a first mounting hole. The first end of the arc-extinguishing cover is provided with a second mounting hole. When the arc-extinguishing cover is installed on the base, the first mounting hole is in position correspondence with the second mounting hole.

[0016] According to the above scheme, the support table provided on the base can support the installation of the arc-extinguishing cover, so that the arc-extinguishing cover is installed more stably. The first mounting hole is provided on the support table, and the second mounting hole is provided on the arc-extinguishing cover. When the first mounting hole is in position correspondence with the second mounting hole, it indicates that the installation of the arc-extinguishing cover is completed. Moreover, after the installation of the arc-extinguishing cover is completed, a fixing member can pass through the first mounting hole and the second mounting hole, so that the arc-extinguishing cover can be limited in the first direction. In combination with the above-mentioned cooperation of the sliding block and the chute to limit the arc-extinguishing cover in the opening direction of the arc-extinguishing cavity, the arc-extinguishing cover can be fixed on the base. Therefore, the probability of the arc-extinguishing cover falling off the base when the arc-extinguishing chamber shakes or bumps can be reduced.

[0017] In a possible design, the number of arc-extinguishing fins is a plurality, the number of slots corresponds to the number of arc-extinguishing fins, and each slot is provided with an arc-extinguishing fin. The plurality of arc-extinguishing fins are arranged side by side in the arc-extinguishing cavity.

[0018] According to the above scheme, the plurality of arc-extinguishing fins provided in the present application can cut the electric arc into multiple small electric arcs for arc-extinguishing operation when the circuit breaker breaks. Since the plurality of arc-extinguishing fins are inserted into the base, the number of slots can also be set to be a plurality. Since the slot includes the first slot and the second slot, and the first slot and the second slot are oppositely arranged, when the plurality of arc-extinguishing fins are installed in the corresponding slots, a side-by-side arrangement is formed. In this way, the arc-extinguishing cavity can accommodate more arc-extinguishing fins, thereby improving the arc-extinguishing effect of the arc-extinguishing chamber.

[0019] In a possible design, the arc-extinguishing chamber further includes an arc separation plate and an arc-extinguishing sheet, and the arc separation plate and the arc-extinguishing sheet are arranged in the arc-extinguishing cavity. The arc separation plate is arranged between the arc-extinguishing fin and the arc-extinguishing sheet.

[0020] By the above scheme, the arc separation plate and the arc elimination sheet are arranged in the arc extinguishing chamber, the arc separation plate and the arc elimination sheet can be used to filter the metal particles generated in the breaking process of the circuit breaker, and the possibility of the problem that the metal particles generated in the breaking process of the circuit breaker enter into the external environment is reduced. The arc separation plate is arranged between the arc extinguishing grid sheet and the arc elimination sheet, the metal particles can be coarsely filtered by the arc separation plate first, and then finely filtered by the arc elimination sheet.

[0021] In a possible design, the side of the arc separation plate facing the arc extinguishing grid sheet is provided with a first groove, and the side of the arc separation plate facing the arc elimination sheet is provided with a second groove.

[0022] By the above scheme, the arc separation plate and the arc elimination sheet are arranged in the arc extinguishing chamber, the arc separation plate and the arc elimination sheet can be used to filter the metal particles generated in the breaking process of the circuit breaker, and the possibility of the problem that the metal particles generated in the breaking process of the circuit breaker enter into the external environment is reduced. The arc separation plate is arranged between the arc extinguishing grid sheet and the arc elimination sheet, the metal particles can be coarsely filtered by the arc separation plate first, and then finely filtered by the arc elimination sheet.

[0023] In a second aspect, the application provides a circuit breaker, which comprises a housing and the arc extinguishing chamber mentioned in the first aspect. The housing is provided with a mounting groove. The arc cover of the arc extinguishing chamber comprises a second end, and the second end protrudes from the base of the arc extinguishing chamber. The base is partially arranged in the mounting groove, and the support table of the base and the arc cover are connected with the housing.

[0024] The circuit breaker provided in the above second aspect has the beneficial effects of the first aspect and the possible implementation manners of the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The overall structure schematic diagram of the circuit breaker provided in the embodiments of the application is shown.

[0026] Figure 2 The explosion view of the arc extinguishing chamber provided in the embodiments of the application is shown.

[0027] Figure 3 The structure schematic diagram of the arc extinguishing chamber in one view provided in the embodiments of the application is shown.

[0028] Figure 4 The structure schematic diagram of the base provided in the embodiments of the application is shown.

[0029] Figure 5An assembly view of the base and the arc-extinguishing grid fin provided by the embodiment of the present application.

[0030] Figure 6 A structural schematic view of the arc-extinguishing cover provided by the embodiment of the present application from another perspective.

[0031] Figure 7 A structural schematic view of the arc-extinguishing chamber provided by the embodiment of the present application from another perspective.

[0032] Figure 8 A structural schematic view of the arc-extinguishing cover provided by the embodiment of the present application from another perspective.

[0033] Figure 9 A structural schematic view of the arc-extinguishing grid fin provided by the embodiment of the present application.

[0034] Figure 10 A structural schematic view of the arc-extinguishing plate provided by the embodiment of the present application.

[0035] Explanation of reference signs:

[0036] 100, arc-extinguishing chamber;

[0037] 200, base; 210, arc-extinguishing cavity; 220, slot; 221, first slot; 222, second slot; 230, first arc-extinguishing wall; 240, second arc-extinguishing wall; 250, sliding slot; 251, guide opening; 260, support table; 261, first mounting hole;

[0038] 300, arc-extinguishing grid fin; 310, first limiting block; 320, second limiting block;

[0039] 400, arc-extinguishing cover; 410, sliding block; 420, first end; 421, second mounting hole; 430, second end; 431, third mounting hole;

[0040] 500, arc-extinguishing plate;

[0041] 600, arc-extinguishing fin;

[0042] 700, shell;

[0043] OX, first direction. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0046] The terms "comprise", "comprising", "include", "including", "have" and "having" and any variations thereof in the specification and in the claims are intended to cover both the singular and the plural unless otherwise indicated; the use of the term "either" is intended to cover both the singular and the plural unless otherwise indicated.

[0047] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another.

[0048] The term "and / or", merely describes association between associated objects, and means that there can be three kinds of relations, for example, A and / or B, can mean that A exists alone, A and B exist together, B exists alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0049] The orientation words appearing in the following description are the directions shown in the drawings, and are not limited to the specific structure of the application. For example, in the description of the application, the terms "center", "lengthwise", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0050] In addition, the terms "first", "second", and the like in the specification and claims of the application or the above drawings are used to distinguish different objects, and are not used to describe a specific order, and can explicitly or implicitly include one or more of the features.

[0051] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection. A physical connection can be a fixed connection, such as a connection secured by fasteners, such as a connection secured by screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0052] To enable those skilled in the art to better understand 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.

[0053] Figure 1 This is a schematic diagram of the overall structure of the circuit breaker provided in the embodiments of this application. Figure 2 An exploded view of the arc-extinguishing chamber provided in an embodiment of this application. Figure 1 as well as Figure 2 As shown, this application provides a circuit breaker, which includes a housing 700 and an arc-extinguishing chamber 300. The housing 700 is provided with a mounting groove. The arc-extinguishing cover 400 of the arc-extinguishing chamber 100 includes a second end 430, which protrudes from the base 200 of the arc-extinguishing chamber 100. The base 200 is partially located in the mounting groove, and both the support platform 260 of the base 200 and the arc-extinguishing cover 300 are connected to the housing 700.

[0054] The housing 700 includes a base and a top cover, which, when closed, form the housing 700 of the circuit breaker. A groove is provided on the side wall of the base near the top cover, and a groove is also provided on the side wall of the top cover facing the base. When the top cover and base are closed, the grooves on the base and top cover combine to form a first mounting groove, which connects the interior and exterior of the housing 700. The housing 700 also has a second mounting groove, which can be a recessed structure formed on the housing 700. The second mounting groove can be a blind groove, and the first mounting groove can communicate with the second mounting groove.

[0055] The support platform 260 of the base 200 and the arc-extinguishing chamber 400 are located outside the housing 700. The arc-extinguishing chamber 400 includes two opposite ends. When the arc-extinguishing chamber 400 is installed on the base 200, the first end 420 of the arc-extinguishing chamber 400 covers the support platform 260 of the base 200, and the first end 420 of the arc-extinguishing chamber 400 is flush with the end of the support platform 260. At this time, the second mounting hole 421 provided on the arc-extinguishing chamber 400 corresponds to the first mounting hole 261 provided on the support platform 260.

[0056] The second end 430 of the arc-extinguishing cover 400 protrudes from the base 200, so that the arc-extinguishing chamber 100 has a 'T' type structure. When the arc-extinguishing chamber 100 is installed on the shell 700, part of the base 200 is inserted into the inside of the circuit breaker through the first mounting slot. The support table 260 and the arc-extinguishing cover 400 are located in the second mounting slot, and the support table 260 and the arc-extinguishing cover 400 abut the bottom of the second mounting slot at the same time, so that the arc-extinguishing chamber 100 can be installed on the shell 700. When the arc-extinguishing chamber 100 is installed on the shell 700, the side wall of the support table 260 can be in contact with the side wall of the second mounting slot, and the side wall of the arc-extinguishing cover 400 can also be in contact with the side wall of the second mounting slot, so that the arc-extinguishing chamber 100 can be limited by the second mounting slot, and the probability of the problem of the position deviation of the arc-extinguishing chamber 100 occurring when the circuit breaker shakes or bumps can be reduced.

[0057] The shell 700 is also provided with two threaded holes, which are arranged on the top cover and the base respectively. The arc-extinguishing chamber 100 can be fixed on the shell 700 by bolts. For example, the support table 260 abuts the bottom of the second mounting slot on the base, and the first mounting hole 261 on the support table 260 corresponds in position to the threaded hole on the base. The support table 260 and the first end 420 of the arc-extinguishing cover 400 can be fixed on the base by bolts passing through the second mounting hole 421, the first mounting hole 261 and the threaded hole on the base in sequence. The second end 430 of the arc-extinguishing cover 400 abuts the bottom of the second mounting slot on the top cover, and the second end 430 of the arc-extinguishing cover 400 is also provided with a third mounting hole 431, which corresponds in position to the threaded hole on the top cover. The second end 430 of the arc-extinguishing cover 400 can be fixed on the shell 700 by bolts passing through the third mounting hole 431 and the threaded hole on the top cover in sequence.

[0058] The second mounting hole 421 and the third mounting hole 431 can be stepped holes. In this way, when the arc-extinguishing chamber 100 is fixed on the shell 700 by bolts, the bolts will not protrude from the surface of the arc-extinguishing cover 400, so that the surface of the arc-extinguishing chamber 100 is relatively flat, and the probability of the problem of scratching caused by the bolts protruding from the surface of the arc-extinguishing cover 400 can be reduced.

[0059] When the parts inside the arc-extinguishing chamber 100 are damaged, the two bolts are removed, the arc-extinguishing chamber 100 is taken out of the shell 700, and the arc-extinguishing cover 400 is taken off the base 200, so that the parts inside the arc-extinguishing chamber 100 can be replaced.

[0060] In order for those skilled in the art to better understand the scheme of the present application, the arc-extinguishing chamber 100 mentioned in the embodiments of the present application will be described clearly and completely in combination with the drawings.

[0061] Figure 3 This is a schematic diagram of the arc-extinguishing chamber provided in an embodiment of this application from one perspective. Figure 4 This is a schematic diagram of the structure of the base provided in an embodiment of this application. Figure 5 This is an assembly diagram of the base and arc-extinguishing grid provided in an embodiment of this application. Figures 3 to 5 As shown, this application provides an arc-extinguishing chamber 100, which includes a base 200, an arc-extinguishing grid 300, and an arc-extinguishing cover 400. The base 200 has an arc-extinguishing cavity 210, and the cavity wall of the arc-extinguishing cavity 210 is provided with a slot 220. The arc-extinguishing grid 300 is located inside the arc-extinguishing cavity 210 and is inserted into the slot 220. The arc-extinguishing cover 400 covers the arc-extinguishing cavity 210 and is detachably connected to the base 200.

[0062] The base 200 has an internal installation space, which is the arc-extinguishing chamber 210. The arc-extinguishing chamber 210 has two openings, which are positioned opposite each other. One of the openings of the arc-extinguishing chamber 210 is used for the entry of the electric arc, and this opening can be called the arc inlet. The other opening of the arc-extinguishing chamber 210 is used for the discharge of high-temperature gases and metal ions and other products generated by the electric arc, and this opening can be called the gas outlet.

[0063] The arc-extinguishing chamber 210 may have a slot 220 on its wall, and the arc-extinguishing grid 300 can be inserted into the slot 220 through the arc inlet or the air outlet. The arc-extinguishing grid 300 can cut the electric arc, thereby achieving the purpose of arc extinguishing. A gas-generating component can also be installed at the arc inlet of the arc-extinguishing chamber 210, and the installation of the gas-generating component can improve the arc extinguishing efficiency of the arc-extinguishing chamber 100.

[0064] After the arc-extinguishing grid plate 300 is inserted into the slot 220, the arc-extinguishing cover 400 can be placed over the air outlet. A through slot can be provided on the side wall of the arc-extinguishing cover 400 corresponding to the air outlet so that the high-temperature gas generated by the electric arc can be discharged to the outside through the through slot on the arc-extinguishing cover 400.

[0065] In summary, this application provides a slot 220 within the arc-extinguishing cavity 210. When installing the arc-extinguishing grid 300 into the arc-extinguishing chamber 100, the arc-extinguishing grid 300 can be inserted into the slot 220, enabling a detachable connection between the arc-extinguishing grid 300 and the base 200. This allows for direct removal and replacement of the arc-extinguishing grid 300 from the base 200 when it is damaged, reducing the difficulty of disassembling and replacing parts inside the arc-extinguishing chamber 100 and lowering the circuit breaker's maintenance costs. When the arc-extinguishing cover 400 is detachably connected to the base 200, the arc-extinguishing cover 400 can be removed from the base 200 for disassembly and replacement of parts inside the arc-extinguishing chamber 100. This further reduces the difficulty of disassembling and replacing parts inside the arc-extinguishing chamber 100.

[0066] like Figure 4 as well asFigure 5 As shown, the cavity wall of the arc extinguishing cavity 210 includes a first arc extinguishing wall 230 and a second arc extinguishing wall 240 which are opposite to each other. The slot 220 includes a first slot 221 and a second slot 222, the first slot 221 is located on the first arc extinguishing wall 230, and the second slot 222 is located on the second arc extinguishing wall 240, and the first slot 221 and the second slot 222 are opposite to each other.

[0067] The first arc extinguishing wall 230 and the second arc extinguishing wall 240 can be two cavity walls of the arc extinguishing cavity 210 which are opposite to each other. The arc extinguishing grid 300 is generally plate-shaped, and when the slot 220 is set as the first slot 221 and the second slot 222, and the first slot 221 is set on the first arc extinguishing wall 230 and the second slot 222 is set on the second arc extinguishing wall 240, the installation of the arc extinguishing grid 300 can be more simple.

[0068] It should be noted that the first slot 221 can be multiple, and the second slot 222 can also be multiple, wherein each first slot 221 can be opposite to one second slot 222.

[0069] The first slot 221 can be a groove structure provided on the first arc extinguishing wall 230 in the direction from the gas outlet to the arc inlet, and the slot of the first slot 221 can be communicated with the gas outlet, and the second slot 222 can be a groove structure provided on the second arc extinguishing wall 240 in the direction from the gas outlet to the arc inlet, and the slot of the second slot 222 can also be communicated with the gas outlet. When the first slot 221 and the second slot 222 are selected in the above setting mode, the arc extinguishing grid 300 can be inserted into the arc extinguishing cavity 210 from the gas outlet.

[0070] After the arc extinguishing grid 300 is inserted into the arc extinguishing cavity 210, the first side of the arc extinguishing grid 300 can be in contact with the two slot walls opposite to the first slot 221, and the first side of the arc extinguishing grid 300 is clamped by the slot walls of the first slot 221. The second side of the arc extinguishing grid 300 can be in contact with the two slot walls opposite to the second slot 222, and the second side of the arc extinguishing grid 300 is clamped by the slot walls of the second slot 222. In this way, the arc extinguishing grid 300 can be fixed in the arc extinguishing cavity 210.

[0071] In summary, the cavity walls of the arc-extinguishing cavity 210 include a first arc-extinguishing wall 230 and a second arc-extinguishing wall 240 positioned opposite each other. A first groove 221 is disposed on the first arc-extinguishing wall 230, and a second groove 222 is disposed on the second arc-extinguishing wall 240, which facilitates the installation of the arc-extinguishing grid plate 300. When the first groove 221 and the second groove 222 are positioned opposite each other, the arc-extinguishing grid plate 300, after being inserted into the arc-extinguishing cavity 210, can be arranged parallel to the other two side walls of the arc-extinguishing cavity 210, thus saving space within the arc-extinguishing cavity 210. This not only allows more arc-extinguishing grid plates 300 to be placed within the arc-extinguishing cavity 210, but also reduces the probability of installation difficulties caused by misalignment of the first groove 221 and the second groove 222.

[0072] like Figures 2 to 5 As shown, the bottom of the first groove 221 is the first limiting wall, and the bottom of the second groove 222 is the second limiting wall. The arc extinguishing grid plate 300 includes a first limiting block 310 and a second limiting block 320. The first limiting block 310 abuts against the first limiting wall, and the second limiting block 320 abuts against the second limiting wall.

[0073] The first groove 221 may have two opposite ends. One end may be the opening of the first groove 221, which may be connected to the air outlet. The other end may be the bottom of the first groove 221, which may be the first limiting wall. The bottom of the groove is closer to the inlet of the arc than the opening.

[0074] The second groove 222 may have two opposite ends. One end may be the opening of the second groove 222, which may be connected to the air outlet. The other end may be the bottom of the second groove 222, which may be the second limiting wall. The bottom of the groove is closer to the inlet of the arc than the opening.

[0075] The first limiting block 310 and the second limiting block 320 can be protruding structures provided on both sides of the arc-extinguishing grid plate 300. When the bottom of the first groove 221 is the groove wall near the air inlet in the first groove 221, and the bottom of the second groove 222 is the groove wall near the air inlet in the second groove 222, during the installation of the arc-extinguishing grid plate 300 into the arc-extinguishing cavity 210, the first limiting block 310 can slide along the first groove 221, and the second limiting block 320 can slide along the second groove 222. When the first limiting block 310 abuts against the first limiting wall, and the second limiting block 320 abuts against the second limiting wall, the installation of the arc-extinguishing grid plate 300 is completed. At this time, the arc-extinguishing grid plate 300 will not continue to move towards the arc inlet. Then, after the arc-extinguishing cover 400 is installed on the base 200, the arc-extinguishing grid plate 300 is limited by the arc-extinguishing cover 400 and will not fall from the air outlet, thus limiting the arc-extinguishing grid plate 300.

[0076] Through the above setting, the first limiting wall and the second limiting wall can limit the installation of the arc-extinguishing fin 300. The arc-extinguishing fin 300 and the base 200 are in a plug-in relationship, and by limiting the arc-extinguishing fin 300, the possibility of the arc-extinguishing fin 300 falling from the base 200 during use of the arc-extinguishing chamber 100 can be reduced. Moreover, when the first limiting block 310 abuts against the first limiting wall and the second limiting block 320 abuts against the second limiting wall, it indicates that the installation of the arc-extinguishing fin 300 is completed. Therefore, the first limiting wall and the second limiting wall can also play a prompting role in the installation process of the arc-extinguishing fin 300.

[0077] Figure 6 A structural schematic view of the arc-extinguishing cover in one perspective provided by an embodiment of the present application. Figure 7 A structural schematic view of the arc-extinguishing chamber in another perspective provided by an embodiment of the present application. As shown in Figure 2 Figures 5 to 7 The base 200 is provided with a sliding groove 250 along the first direction OX, and the arc-extinguishing cover 400 is provided with a sliding block 410 along the first direction OX. The sliding block 410 is located in the sliding groove 250, and the side wall of the sliding block 410 is in contact with the groove wall of the sliding groove 250. The first direction OX is the installation direction of the arc-extinguishing cover 400 towards the base 200.

[0078] The sliding groove 250 can be a groove structure provided on the base 200, and there can be two sliding grooves 250. One of the sliding grooves 250 can be provided on the first arc-extinguishing wall 230, and the other sliding groove 250 can be provided on the second arc-extinguishing wall 240. Moreover, the positions of the two sliding grooves 250 are opposite.

[0079] The arc-extinguishing cover 400 can be U-shaped, and the arc-extinguishing cover 400 can include a first side plate, a bottom plate and a second side plate connected in sequence. There can be two sliding blocks 410, one of which can be provided on the first side plate, and the other sliding block 410 can be provided on the second side plate. Moreover, the two sliding blocks 410 can be oppositely arranged.

[0080] In summary, when the arc-extinguishing cover 400 is installed on the base 200, the sliding block 410 can be located in the sliding groove 250, and the side wall of the sliding block 410 can be in contact with the groove wall of the sliding groove 250. In this way, the arc-extinguishing cover 400 can be limited in the installation direction of the arc-extinguishing fin 300 of the arc-extinguishing cavity 210. Moreover, the inner wall of the arc-extinguishing cover 400 can also abut against the side wall of the base 200, so that the arc-extinguishing cover 400 cannot continue to slide along the sliding groove 250. In this way, the arc-extinguishing cover 400 can be limited in the installation direction of the arc-extinguishing cover 400 towards the base 200. The cooperation mode of the sliding block 410 and the sliding groove 250 is relatively convenient whether in the process of installing the arc-extinguishing cover 400 on the base 200 or in the process of disassembling the arc-extinguishing cover 400 from the base 200.​

[0081] Figure 8 The structural schematic diagram of the arc-extinguishing cover provided by the embodiment of the present application is shown in another view. As shown in Figure 2 、 Figure 3 、 Figure 4 and Figure 8 , the base 200 is provided with a support table 260, and the support table 260 is provided with a first mounting hole 261. The first end 420 of the arc-extinguishing cover 400 is provided with a second mounting hole 421. When the arc-extinguishing cover 400 is mounted on the base 200, the first mounting hole 261 corresponds to the second mounting hole 421 in position.

[0082] The support table 260 can be a protruding structure provided on the base 200 in the first direction OX, and the support table 260 can be plate-shaped. When the arc-extinguishing cover 400 is mounted on the base 200, the arc-extinguishing cover 400 can also be covered on the support table 260. The first mounting hole 261 can be a through-hole structure provided on the support table 260.

[0083] The first end 420 of the arc-extinguishing cover 400 can be an end facing the base 200 during the mounting process of the arc-extinguishing cover 400. During the mounting process of the arc-extinguishing cover 400 on the base 200, the first end 420 first contacts the base 200. The second mounting hole 421 can be a through-hole structure provided on the arc-extinguishing cover 400, and when the second mounting hole 421 corresponds to the first mounting hole 261 in position, it indicates that the arc-extinguishing cover 400 has been mounted.

[0084] In summary, the support table 260 provided on the base 200 can support the mounting of the arc-extinguishing cover 400, making the mounting of the arc-extinguishing cover 400 more stable. The first mounting hole 261 is provided on the support table 260, and the second mounting hole 421 is provided on the arc-extinguishing cover 400, and when the first mounting hole 261 corresponds to the second mounting hole 421 in position, it indicates that the arc-extinguishing cover 400 has been mounted.

[0085] Furthermore, after the arc-extinguishing cover 400 is mounted, a fixing member can pass through the first mounting hole 261 and the second mounting hole 421, so that the arc-extinguishing cover 400 can be limited in the first direction OX. In combination with the above-mentioned cooperation of the sliding block 410 and the sliding groove 250 to limit the arc-extinguishing cover 400 in the opening direction of the arc-extinguishing cavity 210, the arc-extinguishing cover 400 can be fixed on the base 200. Thus, the probability of the arc-extinguishing cover 400 falling off the base 200 when the arc-extinguishing chamber 100 shakes or collides can be reduced.

[0086] As shown in Figures 3 to 6 , the sliding groove 250 is provided with a guide opening 251, and the sliding block 410 is provided with a guide surface. The guide opening 251 cooperates with the guide surface, so that the base 200 can guide the arc-extinguishing cover 400.

[0087] The guide opening 251 can be an opening structure provided at one end of the chute 250, and the opening width of the guide opening 251 can be greater than the width of the chute 250. The guide opening 251 can be formed by chamfering the end of the chute 250, so that the end of the chute 250 can also form a first guide surface.

[0088] The sliding block 410 at the first end 420 of the arc extinguishing cover 400 can also be chamfered to form a second guide surface on the sliding block 410. In this way, during the installation of the arc extinguishing cover 400, the first guide surface and the second guide surface can also guide the installation of the arc extinguishing cover 400.

[0089] Through the above arrangement, the guide opening 251 can guide the sliding block 410, thereby guiding the installation of the arc extinguishing cover 400. In this way, the installation difficulty of the arc extinguishing cover 400 can be reduced, thereby saving the installation cost and operation and maintenance cost of the arc extinguishing chamber 100.

[0090] Figure 9 The structure of the arc extinguishing grid provided in the embodiments of the present application is shown in the figure. As shown in Figures 3 to 5 and Figure 9 The number of arc extinguishing grids 300 is multiple, and the number of the slots 220 corresponds to the number of the arc extinguishing grids 300, and each slot 220 is provided with one arc extinguishing grid 300. The multiple arc extinguishing grids 300 are arranged side by side in the arc extinguishing cavity 210.

[0091] During the breaking process of the circuit breaker, arc will be generated, which will cause damage to the internal components of the circuit breaker. At this time, the arc extinguishing chamber 100 is needed to perform arc extinguishing operation, and the arc extinguishing grid 300 is one of the important components in the arc extinguishing chamber 100, which can cut off the arc to make the arc extinguish faster. The arc extinguishing chamber 100 of the present application is provided with multiple arc extinguishing grids 300 in the arc extinguishing cavity 210, which can cut the arc into small arc segments to achieve the effect of arc extinguishing.

[0092] Since there are multiple arc extinguishing grids 300, and the multiple arc extinguishing grids 300 are inserted into the base 200, the number of the slots 220 in the arc extinguishing cavity 210 also needs to be multiple, so that the number of the slots 220 can correspond to the number of the arc extinguishing grids 300. In addition, the multiple slots 220 have gaps between each other, so that when the multiple arc extinguishing grids 300 are inserted into the corresponding slots 220, the multiple arc extinguishing grids 300 can have gaps therebetween, thereby achieving the effect of cutting the arc into multiple small arc segments.

[0093] The arc extinguishing chamber 100 mentioned in the present application can also be provided with an arc drawing plate, which can attract the arc generated when the circuit breaker is broken to the arc extinguishing chamber 100. The arc drawing plate can also be installed in the slot 200, and the arc drawing plate can be arranged on one side of the plurality of arc extinguishing fins 300.

[0094] During installation of the plurality of arc extinguishing fins 300 in the arc extinguishing cavity 210, the plurality of arc extinguishing fins 300 can be installed by being rotated 180° in turn, so that the plurality of arc extinguishing fins 300 can be arranged in a staggered manner. Figure 9 As shown in the state shown in the middle, the middle portions of the plurality of arc extinguishing fins 300 can be staggered between each other, so that the effect of the arc extinguishing fins 300 on cutting the arc can be improved, thereby improving the arc extinguishing effect of the arc extinguishing chamber 100.

[0095] As described above, the plurality of arc extinguishing fins 300 can cut the arc into multiple small arcs for arc extinguishing operation when the circuit breaker is broken. Since the plurality of arc extinguishing fins 300 are inserted into the base 200, the number of the slots 220 can also be set to be multiple. Since the slots 220 include the first slot 221 and the second slot 222, and the first slot 221 and the second slot 222 are arranged opposite to each other, when the plurality of arc extinguishing fins 300 are installed in the corresponding slots 220, a side-by-side arrangement is formed, so that the arc extinguishing cavity 210 can accommodate more arc extinguishing fins 300, thereby improving the arc extinguishing effect of the arc extinguishing chamber 100.

[0096] As shown in the state shown in the middle, the middle portions of the plurality of arc extinguishing fins 300 can be staggered between each other, so that the effect of the arc extinguishing fins 300 on cutting the arc can be improved, thereby improving the arc extinguishing effect of the arc extinguishing chamber 100. Figure 2 As shown in the state shown in the middle, the middle portions of the plurality of arc extinguishing fins 300 can be staggered between each other, so that the effect of the arc extinguishing fins 300 on cutting the arc can be improved, thereby improving the arc extinguishing effect of the arc extinguishing chamber 100. Figure 3 As shown in the state shown in the middle, the middle portions of the plurality of arc extinguishing fins 300 can be staggered between each other, so that the effect of the arc extinguishing fins 300 on cutting the arc can be improved, thereby improving the arc extinguishing effect of the arc extinguishing chamber 100.

[0097] The arc extinguishing plate 500 can be a plate structure, and the size of the arc extinguishing plate 500 can be slightly smaller than the size of the exhaust port of the arc extinguishing cavity 210, so that the arc extinguishing plate 500 can be placed in the arc extinguishing cavity 210. A plurality of through holes can be provided on the arc extinguishing plate 500, so that the high-temperature gas generated by the arc can be discharged from the arc extinguishing chamber 100 to the outside environment.

[0098] The arc extinguishing plate 600 can also be a plate structure, and the size of the arc extinguishing plate 600 can be the same as the size of the arc extinguishing plate 500, so that the arc extinguishing plate 600 can be placed in the arc extinguishing cavity 210. A plurality of through holes can also be provided on the arc extinguishing plate 600, so that the high-temperature gas generated by the arc can be discharged from the arc extinguishing chamber 100 to the outside environment.

[0099] After the arc-isolating plate 500 and the arc-extinguishing plate 600 are installed inside the arc-extinguishing chamber 210, the arc-extinguishing cover 400 can be placed over the air outlet of the arc-extinguishing chamber 210 to prevent the arc-isolating plate 500 and the arc-extinguishing plate 600 from falling out of the arc-extinguishing chamber 210.

[0100] With the above configuration, this application provides an arc-isolating plate 500 and an arc-extinguishing plate 600 within the arc-extinguishing chamber 100. These components can filter metal particles generated during the circuit breaker's breaking process, reducing the likelihood of these particles entering the external environment. By placing the arc-isolating plate 500 between the arc-extinguishing grid plate 300 and the arc-extinguishing plate 600, the metal particles can first undergo coarse filtration by the arc-isolating plate 500, followed by fine filtration by the arc-extinguishing plate 600.

[0101] Figure 10 This is a schematic diagram of the arc-damping plate provided in an embodiment of this application. Figure 2 , Figure 3 as well as Figure 10 The arc-blocking plate 500 shown has a first groove on the side facing the arc-extinguishing grid plate 300, and a second groove on the side facing the arc-extinguishing plate 600.

[0102] The arc-isolating plate 500 is recessed on the side facing the arc-extinguishing grid 300 in a direction away from the arc-extinguishing grid 300, and the arc-isolating plate 500 is also recessed on the side facing the arc-extinguishing plate 600 in a direction away from the arc-extinguishing plate 600, thus allowing the cross-section of the arc-isolating plate 500 to be H-shaped. Multiple through holes provided on the arc-isolating plate 500 can be evenly located in the recessed areas of the arc-isolating plate 500.

[0103] Because there are multiple arc-extinguishing grid plates 300, when these multiple arc-extinguishing grid plates 300 are installed inside the arc-extinguishing cavity 210, the ends of the multiple arc-extinguishing grid plates 300 facing the arc-extinguishing cover 400 are flush, so that the ends of the multiple arc-extinguishing grid plates 300 facing the arc-extinguishing cover 400 can form a plane. This facilitates the placement of the arc-blocking plate 500.

[0104] When the arc-isolating plate 500 is placed on the arc-extinguishing grid plate 300, the edge of the arc-isolating plate 500 contacts the arc-extinguishing grid plate 300, and a first groove on the side of the arc-isolating plate 500 facing the arc-extinguishing grid plate 300 can form a gap with the arc-extinguishing grid plate 300. When the arc-extinguishing plate 600 is placed on the arc-isolating plate 500, the edge of the arc-isolating plate 500 contacts the arc-extinguishing plate 600, and a second groove on the side of the arc-isolating plate 500 facing the arc-extinguishing plate 600 can form a gap with the arc-extinguishing plate 600.

[0105] In summary, the circuit breaker will produce arc in the process of breaking, and the generated arc will enter into the arc extinguishing chamber 100. The arc entering into the arc extinguishing chamber 100 will make a large amount of high-temperature gas generated in the arc extinguishing chamber 100. These high-temperature gases will be discharged from the gas outlet of the arc extinguishing cavity 210. The groove provided on the arc separation plate 500 can make the gap between the arc extinguishing grid 300, the arc separation plate 500 and the arc extinguishing sheet 600. In this way, the high-temperature gas generated by the arc will not gather between the arc extinguishing grid 300, the arc separation plate 500 and the arc extinguishing sheet 600. The high-temperature gas is provided with a gas discharge gap, so that the gas pressure can be quickly reduced, the cavity pressure is discharged to the outside of the arc extinguishing chamber 100, and the normal extinguishing of the arc is ensured. And it can also reduce the probability of the problem that the high-temperature and high-pressure gas in the arc extinguishing chamber 100 cannot be quickly released, thereby possibly causing an explosion.

Claims

1. An arc-extinguishing chamber for use in a circuit breaker, characterized in that The application relates to an arc extinguishing chamber. The arc extinguishing chamber comprises a base and an arc extinguishing cavity, wherein the cavity wall of the arc extinguishing cavity is provided with a slot; An arc extinguishing grid is arranged in the arc extinguishing cavity, and the arc extinguishing grid is inserted into the slot; An arc extinguishing cover is arranged on the arc extinguishing cavity, and the arc extinguishing cover is detachably connected with the base.

2. The arc chute according to claim 1, characterized in that The cavity wall of the arc extinguishing cavity comprises a first arc extinguishing wall and a second arc extinguishing wall which are opposite to each other; The slot comprises a first slot and a second slot, the first slot is arranged on the first arc extinguishing wall, the second slot is arranged on the second arc extinguishing wall, and the first slot and the second slot are opposite to each other.

3. The arc chute of claim 2, wherein, The bottom of the first slot is a first limiting wall, and the bottom of the second slot is a second limiting wall; The arc extinguishing grid comprises a first limiting block and a second limiting block, the first limiting block is in abutment with the first limiting wall, and the second limiting block is in abutment with the second limiting wall.

4. The arc chute of claim 1, wherein, The base is provided with a sliding groove in a first direction, and the arc extinguishing cover is provided with a sliding block in the first direction; The sliding block is arranged in the sliding groove, and the side wall of the sliding block is in contact with the groove wall of the sliding groove; The first direction is the mounting direction of the arc extinguishing cover towards the base.

5. The arc chute of claim 4, wherein, The sliding groove is provided with a guide opening, and the sliding block is provided with a guide surface; The guide opening and the guide surface are matched to guide the base to the arc extinguishing cover.

6. The arc chute of claim 1, wherein, The base is provided with a supporting table, and the supporting table is provided with a first mounting hole; The first end of the arc extinguishing cover is provided with a second mounting hole; When the arc extinguishing cover is mounted on the base, the first mounting hole and the second mounting hole are in position correspondence.

7. The arc chute of claim 1, wherein, The number of the arc extinguishing grids is plural, the number of the slots is corresponding to the number of the arc extinguishing grids, and one arc extinguishing grid is arranged in each slot; The plural arc extinguishing grids are arranged side by side in the arc extinguishing cavity.

8. The arc chute according to any one of claims 1-7, characterized in that, The arc extinguishing chamber further comprises an arc separation plate and an arc extinguishing sheet, and the arc separation plate and the arc extinguishing sheet are arranged in the arc extinguishing cavity; The arc separation plate is arranged between the arc extinguishing grid and the arc extinguishing sheet.

9. The arc chute of claim 8, wherein, One side of the arc separation plate towards the arc extinguishing grid is provided with a first groove, and the other side of the arc separation plate towards the arc extinguishing sheet is provided with a second groove.

10. A circuit breaker characterized by, The application relates to an arc extinguishing chamber. The shell is provided with a mounting groove; The arc extinguishing cover of the arc extinguishing chamber comprises a second end which protrudes from the base of the arc extinguishing chamber; The base is partially arranged in the mounting groove, and the supporting table of the base and the arc extinguishing cover are connected with the shell.

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