Arc extinguishing mechanism and circuit breaker

Abstract

The utility model provides an arc extinguishing mechanism and a circuit breaker, and belongs to the technical field of electrical equipment. The arc extinguishing mechanism comprises an arc extinguishing chamber, a static contact and an arc extinguishing cover. The arc extinguish chamber is provided with a first connecting structure. The static contact comprises an installation part, at least part of the installation part is located in the arc extinguish chamber, the installation part is used for arranging a static contact, and the installation part is further provided with a second connecting structure. The arc extinguishing chamber is at least partially arranged in the arc extinguishing chamber, and the arc extinguishing chamber is provided with a third connecting structure and a fourth connecting structure. And the first connecting structure is matched with the third connecting structure, and the second connecting structure is matched with the fourth connecting structure, so that the arc extinguishing chamber, the static contact and the arc extinguishing cover are assembled into a whole. The arc extinguishing chamber, the arc extinguishing cover and the static contact are assembled into a whole, so that when the circuit breaker is assembled, the arc extinguishing chamber, the arc extinguishing cover and the static contact do not need to be respectively installed, the assembling steps of the circuit breaker are simplified, the error probability when the circuit breaker is assembled is reduced, and the production efficiency is improved.

Description

Technical Field

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

[0002] Circuit breakers are important switchgear in power plants, capable of opening and closing, carrying and interrupting current in circuits. When the circuit breaker is opened, an arc will be generated between the moving contact and the stationary contact. The arc generated between the moving contact and the stationary contact is usually transferred to the arc extinguishing mechanism of the circuit breaker, and then extinguished in the arc extinguishing mechanism.

[0003] In the prior art, since the size of the circuit breaker is generally small and there are many parts in the housing, installing the arc extinguishing mechanism in the housing of the circuit breaker is not only time-consuming but also prone to installation errors. Utility Model Content

[0004] The present application provides an arc extinguishing mechanism and a circuit breaker, which improve the installation efficiency of the arc extinguishing mechanism.

[0005] In a first aspect, the present application provides an arc extinguishing mechanism, comprising: an arc extinguishing chamber, a static contact and an arc extinguishing hood. The arc extinguishing chamber is provided with a first connecting structure. The static contact comprises a mounting portion, the mounting portion is at least partially located in the arc extinguishing chamber, the mounting portion is used to set the static contact, and the mounting portion is also provided with a second connecting structure. The arc extinguishing hood is at least partially arranged in the arc extinguishing chamber, and the arc extinguishing hood is provided with a third connecting structure and a fourth connecting structure. The first connecting structure cooperates with the third connecting structure, and the second connecting structure cooperates with the fourth connecting structure, so that the arc extinguishing chamber, the static contact and the arc extinguishing hood are assembled into a whole.

[0006] Through the above scheme, the arc extinguishing chamber is provided with a first connection structure, and the arc extinguishing hood is provided with a third connection structure. When the first connection structure cooperates with the third connection structure, that is, when the first connection structure is connected to the third connection structure, the arc extinguishing chamber and the arc extinguishing hood can form a module. The static contact includes a mounting portion, the mounting portion is provided with a second connection structure, and the arc extinguishing hood is also provided with a fourth connection structure. When the second connection structure cooperates with the fourth connection structure, that is, when the second connection structure is connected to the fourth connection structure, the arc extinguishing hood and the static contact can form a module. When the first connection structure cooperates with the third connection structure and the second connection structure cooperates with the fourth connection structure, that is, when the first connection structure is connected to the third connection structure and the second connection structure is connected to the fourth connection structure, the arc extinguishing chamber, the arc extinguishing hood and the static contact can be assembled into a whole. When the arc extinguishing chamber and the arc extinguishing hood form a module, and the arc extinguishing hood and the static contact form a module, the arc extinguishing chamber, the arc extinguishing hood and the static contact can be assembled into a whole. In this way, when assembling the circuit breaker, the arc extinguishing chamber, the arc extinguishing hood and the static contact can be assembled into a whole first, and then the whole can be placed in the housing of the circuit breaker together, so that the arc extinguishing chamber, the arc extinguishing hood and the static contact can be installed in the housing without installing the arc extinguishing chamber, the arc extinguishing hood and the static contact one by one in the housing with a small space. In this way, the assembly steps of the circuit breaker are simplified. On the one hand, the probability of error when assembling the circuit breaker can be reduced. On the other hand, the time cost when assembling the circuit breaker can be saved, and the production efficiency is improved.

[0007] In a possible design, the arc extinguishing chamber includes an arc extinguishing grid, the first connection structure is a groove provided on the arc extinguishing grid, the third connection structure is a protrusion provided on the arc extinguishing hood, and the protrusion is at least partially embedded in the groove. Alternatively, the first connection structure is a protrusion provided on the arc extinguishing grid, the third connection structure is a groove provided on the arc extinguishing hood, and the protrusion is at least partially embedded in the groove.

[0008] Through the above scheme, the first connection structure cooperates with the third connection structure, and the protrusion can be partially or completely embedded in the groove. At this time, the relative position between the arc extinguishing chamber and the arc extinguishing cover is fixed, that is, the arc extinguishing chamber and the arc extinguishing cover form a module. By using the cooperation of the protrusion and the groove, not only can the arc extinguishing chamber and the arc extinguishing cover form a module, but also the relative displacement of the arc extinguishing chamber and the arc extinguishing cover can be limited, reducing the possibility of the arc extinguishing cover shaking in the arc extinguishing chamber and increasing the stability of the arc extinguishing cover when assisting arc extinguishing.

[0009] In one possible design, the arc extinguishing chamber includes an arc extinguishing grid, the first connecting structure is a slot provided on the arc extinguishing grid, and the third connecting structure is a spring structure, one end of the spring structure is connected to the arc extinguishing cover, and the other end of the spring structure is provided with a buckle, which is engaged with the slot.

[0010] Through the above scheme, the third connection structure is configured as a spring sheet structure provided on the arc extinguishing hood, and when the buckle on the spring sheet structure is engaged with the slot on the arc extinguishing grid, the arc extinguishing hood and the arc extinguishing chamber can be assembled. The structure for assembling the arc extinguishing hood and the arc extinguishing chamber is simple and easy to operate. Since the spring sheet structure has toughness and can be deformed, when the third connection structure cooperates with the first connection structure, the tightness of the connection between the arc extinguishing chamber and the arc extinguishing hood can be improved, thereby reducing the possibility of the arc extinguishing hood shaking in the arc extinguishing chamber and increasing the stability of the arc extinguishing hood when assisting in arc extinguishing.

[0011] In a possible design, the mounting portion includes a first mounting plate, the arc extinguishing cover includes a hook, the second connecting structure is the first mounting plate, and the fourth connecting structure is the hook.

[0012] Through the above solution, the second connection structure is configured as the first mounting plate, and the fourth connection structure is configured as a hook. When the hook bend of the hook hooks the first mounting plate, the second connection structure cooperates with the fourth connection structure to make the static contact and the arc extinguishing cover form a whole. In addition, the hook structure has the advantages of high strength, easy installation and easy disassembly, so that the difficulty of installing the arc extinguishing cover can be reduced and the installation efficiency of the arc extinguishing mechanism can be improved.

[0013] In a possible design, the arc extinguishing chamber includes an arc extinguishing grid, the arc extinguishing cover includes a first plate, the first plate is located between the arc extinguishing grid and the first mounting plate, and the hook is provided on a side of the first plate facing the first mounting plate.

[0014] Through the above scheme, the first plate is located between the arc extinguishing grid and the first mounting plate, so that the bottom plate of the arc extinguishing hood is located between the arc extinguishing chamber and the static contact, so that when the arc extinguishing chamber, the arc extinguishing hood and the static contact are assembled, the arc extinguishing chamber and the static contact can limit the arc extinguishing hood, reduce the possibility of the arc extinguishing hood shaking in the arc extinguishing chamber, and increase the stability of the arc extinguishing hood when assisting arc extinguishing. When the hook is provided on the side of the first plate facing the first mounting plate, the hook can pass through the through hole provided on the first mounting plate, thereby hooking the first mounting plate, and completing the assembly of the static contact and the arc extinguishing hood.

[0015] In a possible design, the hook is hooked with a side of the first mounting plate facing away from the static contact. Alternatively, the first mounting plate is provided with a first hook groove, and the hook at least partially extends into the first hook groove and hooks with a groove wall of the first hook groove.

[0016] Through the above scheme, the hook is hooked with the side of the first mounting plate facing away from the static contact, which not only allows the arc extinguishing hood to be installed on the static contact, but also allows the first mounting plate to limit the hook, thereby limiting the arc extinguishing hood. The first hook groove is provided to increase the stability of the arc extinguishing hood when the arc extinguishing hood is installed on the static contact, and the first hook groove is provided to also play a certain guiding role for the arc extinguishing hood, thereby reducing the difficulty of installing the arc extinguishing hood and improving the installation efficiency of the circuit breaker.

[0017] In a possible design, the mounting portion further includes a second mounting plate, the second mounting plate is bent, one end of the second mounting plate is connected to the first mounting plate, and the side of the second mounting plate facing away from the first mounting plate is used to set the static contact. There is a gap between the preset position of the second mounting plate and the first mounting plate, and the preset position is the rest of the second mounting plate except the part connected to the first mounting plate. The arc extinguishing cover is also provided with a limit block, and the limit block is at least partially located in the gap.

[0018] Through the above scheme, the second mounting plate is bent and one end of the second mounting plate is connected to the first mounting plate, so that a gap is generated between the preset position of the second mounting plate and the first mounting plate. When the arc extinguishing hood is installed on the static contact, the limit block provided on the arc extinguishing hood can be located in the gap, so that when the arc extinguishing hood is installed on the static contact, the limit block and the gap interact with each other, so that the static contact plays a limiting role on the arc extinguishing hood, thereby reducing the possibility of the arc extinguishing hood shaking in the arc extinguishing chamber and increasing the stability of the arc extinguishing hood when assisting in arc extinguishing.

[0019] In a possible design, the limit block is arranged on the side of the first plate facing away from the first mounting plate, or the arc extinguishing cover also includes a first vertical plate, one side of the first vertical plate is connected to the first plate, and the limit block is arranged on the first vertical plate.

[0020] Through the above scheme, the limit block can be set on the side of the first plate facing away from the first mounting plate, and the limit block can also be set at the connection between the first vertical plate and the first plate. This application does not limit the setting position of the limit block, and it only needs to be located in the gap when the arc extinguishing cover is installed on the static contact. The setting position of the limit block can be selected according to actual manufacturing requirements and usage requirements.

[0021] In one possible design, the arc-extinguishing grid includes a first segment and a second segment that are spaced apart, and the arc-extinguishing cover also includes a second vertical plate, one side of the second vertical plate is connected to the first mounting plate, the first vertical plate and the second vertical plate are located between the first segment and the second segment, the first vertical plate abuts against the first segment of the plurality of arc-extinguishing grids, and the second vertical plate abuts against the second segment of the plurality of arc-extinguishing grids.

[0022] Through the above scheme, the arc extinguishing hood is provided with a first vertical plate and a second vertical plate. When the arc extinguishing hood is installed on the arc extinguishing chamber, the first vertical plate abuts against the first segments of the plurality of arc extinguishing grids, and the second vertical plate abuts against the second segments of the plurality of arc extinguishing grids. In this way, the stability of the arc extinguishing hood when installed on the arc extinguishing chamber can be increased. The first vertical plate is supported by the plurality of first segments, and the second vertical plate is supported by the plurality of second segments. The arc extinguishing hood can also be limited to a certain extent, thereby reducing the possibility of the arc extinguishing hood shaking in the arc extinguishing chamber and increasing the stability of the arc extinguishing hood when assisting in arc extinguishing.

[0023] In a second aspect, the present application provides a circuit breaker, comprising a housing and the arc extinguishing mechanism in the first aspect, wherein the arc extinguishing mechanism is disposed in the housing.

[0024] Through the above scheme, the circuit breaker provided by the present application is assembled into an arc extinguishing mechanism by assembling the arc extinguishing chamber, the arc extinguishing hood and the static contact. When assembling the circuit breaker, it is no longer necessary to install the arc extinguishing chamber, the arc extinguishing hood and the static contact separately, thus simplifying the assembly steps of the circuit breaker. On the one hand, it reduces the probability of errors when assembling the circuit breaker. On the other hand, assembling the arc extinguishing chamber, the arc extinguishing hood and the static contact into a whole before installing them into the circuit breaker can also save time costs when installing the circuit breaker and improve production efficiency.

[0025] The beneficial effects of the circuit breaker provided in the second aspect can be referred to the beneficial effects brought about by the first aspect and the possible implementation methods of the first aspect, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic structural diagram of an arc extinguishing mechanism provided in an embodiment of the present application at a certain viewing angle.

[0027] Figure 2 An exploded view of an arc extinguishing mechanism provided in an embodiment of the present application.

[0028] Figure 3 A schematic diagram of the structure of the arc extinguishing chamber provided in an embodiment of the present application.

[0029] Figure 4 A schematic diagram of the structure of the arc extinguishing hood provided in an embodiment of the present application at a certain viewing angle.

[0030] Figure 5 A schematic diagram of the structure of a static contact provided in an embodiment of the present application at a certain viewing angle.

[0031] Figure 6 A schematic structural diagram of a static contact provided in an embodiment of the present application from another perspective.

[0032] Figure 7 A schematic diagram of the structure of the arc extinguishing hood provided in an embodiment of the present application from another perspective.

[0033] Figure 8 A cross-sectional view of the arc extinguishing mechanism provided in an embodiment of the present application.

[0034] Fig. 9 A schematic structural diagram of an arc extinguishing mechanism provided in an embodiment of the present application from another perspective.

[0035] Fig.10 A schematic diagram of a partial structure of a circuit breaker provided in an embodiment of the present application.

[0036] Description of reference numerals:

[0037] 100, arc extinguishing chamber; 110, first connecting structure; 120, arc extinguishing grid; 121, first segment; 122, second segment;

[0038] 200, static contact; 210, mounting portion; 211, first mounting plate; 212, second mounting plate; 220, gap; 230, through hole;

[0039] 300, arc extinguishing cover; 310, third connecting structure; 320, fourth connecting structure; 330, first plate; 340, limit block; 350, first vertical plate; 360, second vertical plate; 370, second plate;

[0040] 400. Shell. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0043] The terms "comprising" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover but not exclude other contents. The word "a" or "an" does not exclude the presence of a plurality.

[0044] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiments" in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0045] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0046] The directional words appearing in the following description are all directions shown in the figures, and do not limit the static contact of a circuit breaker of the present application and the specific structure of the circuit breaker. For example, in the description of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present application.

[0047] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0048] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure may refer to a physical connection. For example, the physical connection may be a fixed connection, such as a fixed connection through a fixing member, such as a fixed connection through a screw, bolt or other fixing member; the physical connection may also be a detachable connection, such as a mutual snap connection or snap connection; the physical connection may also be an integral connection, such as welding, bonding or integral molding to form a connection for connection. The "connection" or "connection" of a circuit structure may refer to an electrical connection or a signal connection in addition to a physical connection. For example, it may be a direct connection, that is, a physical connection, or it may be an indirect connection through at least one intermediate element, as long as the circuit is connected, or it may be the internal connection of two elements; the signal connection may refer to a signal connection through a media medium, such as a radio wave, in addition to a signal connection through a circuit. For ordinary technicians in this field, the specific meanings of the above terms in this 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 solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0050] Figure 1 A schematic structural diagram of an arc extinguishing mechanism provided in an embodiment of the present application at a certain viewing angle. Figure 2 An exploded view of an arc extinguishing mechanism provided in an embodiment of the present application.

[0051] like Figure 1 as well as Figure 2 As shown, the present application provides an arc extinguishing mechanism, which is applied to a circuit breaker. The arc extinguishing mechanism includes: an arc extinguishing chamber 100, a static contact 200 and an arc extinguishing cover 300. The arc extinguishing chamber 100 is provided with a first connecting structure 110. The static contact 200 includes a mounting portion 210, the mounting portion 210 is at least partially located in the arc extinguishing chamber 100, the mounting portion 210 is used to set the static contact, and the mounting portion 210 is also provided with a second connecting structure. The arc extinguishing cover 300 is at least partially arranged in the arc extinguishing chamber 100, and the arc extinguishing cover 300 is provided with a third connecting structure 310 and a fourth connecting structure 320. The first connecting structure 110 cooperates with the third connecting structure 310, and the second connecting structure cooperates with the fourth connecting structure 320, so that the arc extinguishing chamber 100, the static contact 200 and the arc extinguishing cover 300 are assembled into a whole.

[0052] The arc extinguishing chamber 100 generally includes two arc-isolating plates and a plurality of arc-extinguishing grids 120. The two arc-isolating plates can be arranged in parallel and at intervals, and the plurality of arc-extinguishing grids 120 are arranged between the two arc-isolating plates, and the plurality of arc-extinguishing grids 120 can be stacked at equal intervals to facilitate cutting off the arc. The arc extinguishing chamber 100 includes an arc-entry side and an arc-exiting side that are relatively located. The arc-entry side is a side of the arc extinguishing chamber 100 that is close to the static contact and the moving contact. The arc-entry side is used to allow the arc generated when the moving contact and the static contact are separated to enter the arc extinguishing chamber 100, and the arc-exiting side is used to allow the gas in the arc extinguishing chamber 100 to flow out.

[0053] The arc isolation plate can be a plate-shaped structure, and the arc isolation plate is usually made of insulating materials. For example, the arc isolation plate can be made of materials such as cyanuric glass cloth board, red steel paperboard or ceramics.

[0054] The arc extinguishing grid 120 is usually made of metal material. The surface of the arc extinguishing grid 120 is often zinc-plated, copper-plated or nickel-plated. Plating the arc extinguishing grid 120 can not only prevent the arc extinguishing grid 120 from rusting, but also increase the arc extinguishing ability of the arc extinguishing chamber 100.

[0055] When the circuit breaker is opened, an arc is generated between the moving contact and the stationary contact 200. The generated arc is attracted by the arc-starting pieces on the arc-extinguishing grid 120 and enters the arc-extinguishing chamber 100. The arc is cut into multiple short arcs by multiple arc-extinguishing grids 120, thereby extinguishing the arc.

[0056] The first connection structure 110 may be a connection member provided on the arc extinguishing chamber 100, the first connection structure 110 may be provided on the arc isolation plate, or the first connection structure 110 may be provided on the arc extinguishing grid 120, which is not limited in the present embodiment. The specific structural form of the first connection structure 110 will be introduced later and will not be expanded here.

[0057] The circuit breaker includes a static contact 200 and a moving contact. The static contact 200 is fixedly arranged in the circuit breaker, and the moving contact is movably connected in the circuit breaker. Silver dots are provided on both the static contact 200 and the moving contact. When the circuit breaker is closed, the silver dot on the static contact 200 abuts against the silver dot on the moving contact. When the circuit breaker is opened, the silver dot on the static contact 200 and the silver dot on the moving contact are separated from each other.

[0058] The static contact 200 includes a mounting portion 210, and a static silver point is arranged on the mounting portion 210. At least the static silver point in the mounting portion 210 is located in the arc extinguishing chamber 100. The second connection structure can be a connecting piece arranged on the mounting portion 210, and the second connection structure can also be a part of the mounting portion 210, which is not limited in the embodiment of the present application. The specific structural form of the second connection structure 210 will be introduced later and will not be expanded here.

[0059] The arc extinguishing hood 300 is a device used to assist the arc extinguishing mechanism in extinguishing the arc. The arc extinguishing hood 300 is usually made of insulating materials. For example, the arc extinguishing hood 300 can be made of materials such as nylon or bulk molding plastic.

[0060] like Figure 2 As shown, the arc extinguishing cover 300 may include a first plate 330 and a second plate 370 that are positioned opposite to each other, a plurality of arc extinguishing grids 120 are located between the first plate 330 and the second plate 370, and the first plate 330 is closer to the static contact 200 than the second plate 370. The third connecting structure 310 may be provided on a side of the first plate 330 facing the second plate 370, and the fourth connecting structure 320 may be provided on a side of the second plate 370 facing away from the first plate 330. It is understood that the third connecting structure 310 and the fourth connecting structure 320 may also be provided at other positions of the arc extinguishing cover 300, and the embodiment of the present application is not limited thereto.

[0061] The third connection structure 310 may be a connection piece provided on the arc extinguishing hood 300, or may be a part of the arc extinguishing hood 300. Similarly, the fourth connection structure 320 may be a connection piece provided on the arc extinguishing hood 300, or may be a part of the arc extinguishing hood 300. The specific structural forms of the third connection structure 310 and the fourth connection structure 320 will be described later and will not be expanded here.

[0062] The working principle of the arc extinguishing hood 300 is as follows: the arc generated by the moving contact and the static contact 200 at the beginning enters the arc extinguishing chamber 100 from the arc entry side, eroding the arc extinguishing hood 300, causing the arc extinguishing hood 300 to produce a large amount of gas, thereby increasing the pressure in the arc extinguishing chamber 100, and forming a pressure difference between the inside of the arc extinguishing chamber 100 and the outside of the arc extinguishing chamber 100. Gas blowing is formed on the arc through the gas outlet, causing the arc to be strongly cooled and elongated, thereby reducing the electric field strength in the arc and extinguishing the arc quickly.

[0063] In summary, the arc extinguishing chamber 100 is provided with a first connection structure 110, and the arc extinguishing cover 300 is provided with a third connection structure 310. When the first connection structure 110 and the third connection structure 310 are matched, that is, when the first connection structure 110 and the third connection structure 310 are connected, the arc extinguishing chamber 100 and the arc extinguishing cover 300 can form a module. The static contact 200 includes a mounting portion 210, and the mounting portion 210 is provided with a second connection structure. The arc extinguishing cover 300 is also provided with a fourth connection structure 320. When the second connection structure and the fourth connection structure 320 are matched, that is, when the second connection structure and the fourth connection structure 320 are connected, the arc extinguishing cover 300 and the static contact 200 can form a module.

[0064] In the case where the arc extinguishing chamber 100 and the arc extinguishing cover 300 form a module, and the arc extinguishing cover 300 and the static contact 200 form a module, the arc extinguishing chamber 100, the arc extinguishing cover 300 and the static contact 200 can be assembled into a whole. In this way, when assembling the circuit breaker, the arc extinguishing chamber 100, the arc extinguishing cover 300 and the static contact 200 can be assembled into a whole first, and then the whole is placed in the housing 400 of the circuit breaker together, so that the arc extinguishing chamber 100, the arc extinguishing cover 300 and the static contact 200 are installed in the housing 400, without the need to install the arc extinguishing chamber 100, the arc extinguishing cover 300 and the static contact 200 one by one into the housing 400 with a small space. In this way, the assembly steps of the circuit breaker are simplified. On the one hand, the probability of error when assembling the circuit breaker can be reduced. On the other hand, the time cost when assembling the circuit breaker can also be saved, and the production efficiency is improved.

[0065] The first connection structure 110 and the third connection structure 310 may have various structural forms. Three possible structural forms are exemplarily shown below, but they do not constitute a limitation on the technical solution of the present application.

[0066] Figure 3 A schematic diagram of the structure of the arc extinguishing chamber provided in an embodiment of the present application. Figure 4 A schematic diagram of the structure of the arc extinguishing hood provided in an embodiment of the present application at a certain viewing angle.

[0067] The first structural form, such as Figure 3 as well as Figure 4 As shown, the first connection structure 110 may be a groove provided on the arc-extinguishing grid 120 , and the third connection structure 310 may be a protrusion provided on the arc-extinguishing cover 300 , and the protrusion is at least partially embedded in the groove.

[0068] Alternatively, the first connection structure 110 may be a protrusion provided on the arc-extinguishing grid 120 , and the third connection structure 310 may be a groove provided on the arc-extinguishing cover 300 , and the protrusion is at least partially embedded in the groove.

[0069] When the first structural form is selected, the first connection structure 110 cooperates with the third connection structure 310, and the protrusion can be partially or completely embedded in the groove. At this time, the relative position between the arc extinguishing chamber 100 and the arc extinguishing cover 300 is fixed, so that the arc extinguishing chamber 100 and the arc extinguishing cover 300 form a module. By using the cooperation of the protrusion and the groove, not only can the arc extinguishing chamber 100 and the arc extinguishing cover 300 form a module, but also the relative displacement of the arc extinguishing chamber 100 and the arc extinguishing cover 300 can be limited, reducing the possibility of the arc extinguishing cover 300 shaking or even moving in the arc extinguishing chamber 100, and increasing the stability of the arc extinguishing cover 300 when assisting arc extinguishing.

[0070] In the second structural form, the first connecting structure 110 can be a slot provided on the arc extinguishing grid 120, and the third connecting structure 310 can be a spring structure, one end of the spring structure is connected to the arc extinguishing cover 300, and the other end of the spring structure is provided with a buckle, which is buckled with the slot.

[0071] The spring sheet structure may be in the shape of a long strip plate, may be integrally formed with the arc extinguishing cover 300, or may be separately formed from the arc extinguishing cover 300 and then connected in a detachable manner.

[0072] The spring sheet structure can be made of soft plastic material, and the spring sheet structure has a certain toughness. When the arc extinguishing chamber 100 and the arc extinguishing cover 300 are assembled, the spring sheet structure is deformed under the pressure of the arc extinguishing grid 120, and when the buckle provided at one end of the spring sheet structure is engaged with the slot on the arc extinguishing grid 120, the spring sheet structure recovers the deformation, so that the buckle is firmly engaged in the slot.

[0073] When the second structural form is selected, the third connection structure 310 is configured as a spring structure provided on the arc extinguishing hood 300. When the buckle on the spring structure is engaged with the slot on the arc extinguishing grid 120, the arc extinguishing hood 300 and the arc extinguishing chamber 100 can be assembled. The structure for assembling the arc extinguishing hood 300 and the arc extinguishing chamber 100 is simple and easy to operate. Since the spring structure has toughness and can be deformed, when the third connection structure 310 cooperates with the first connection structure 110, the tightness of the connection between the arc extinguishing chamber 100 and the arc extinguishing hood 300 can be improved, thereby reducing the possibility of the arc extinguishing hood 300 shaking in the arc extinguishing chamber 100 and increasing the stability of the arc extinguishing hood 300 when assisting in arc extinguishing.

[0074] In the third structural form, the first connection structure 110 may be a groove provided on the arc isolation plate, and the third connection structure 310 may be a protrusion provided on the arc extinguishing cover 300, and the protrusion is at least partially embedded in the groove. Alternatively, the first connection structure 110 may be a protrusion provided on the arc isolation plate, and the third connection structure 310 may be a groove provided on the arc extinguishing cover 300, and the protrusion is at least partially embedded in the groove.

[0075] When the third structural form is selected, the first connection structure 110 provided on the arc isolation plate cooperates with the third connection structure 310 on the arc extinguishing hood 300, so that the arc extinguishing chamber 100 and the arc extinguishing hood 300 can be assembled into a module. In addition, the first connection structure 110 provided on the arc isolation plate can also guide the installation of the arc extinguishing hood 300 when the arc extinguishing hood 300 is installed in the arc extinguishing chamber 100, thereby reducing the difficulty of installing the arc extinguishing hood 300 and improving the installation efficiency of the arc extinguishing hood 300.

[0076] Figure 5 A schematic diagram of the structure of the static contact provided in an embodiment of the present application. Figure 6A schematic structural diagram of a static contact provided in an embodiment of the present application from another perspective. Figure 7 The schematic diagram of the structure of the arc extinguishing cover provided in the embodiment of the present application from another perspective. Figures 4 to 7 As shown, the mounting portion 210 includes a first mounting plate 211 , the arc extinguishing cover 300 includes a hook, the second connection structure is the first mounting plate 211 , and the fourth connection structure 320 is a hook.

[0077] The first mounting plate 211 may be a plate-like structure. The first mounting plate 211 is usually made of a conductive material. For example, the first mounting plate 211 may be made of copper, aluminum, silver, and the like. The first mounting plate 211 is provided with a through hole 230, and the through hole 230 may be square, and the like.

[0078] The hook is a hook-shaped structure, and the hook can be made of the same material as the arc extinguishing cover 300. The hook includes a hook handle and a hook bend, and the hook handle can be integrally formed with the arc extinguishing cover 300, or can be manufactured separately from the arc extinguishing cover 300 and then connected in a detachable manner.

[0079] Through the above arrangement, the second connection structure is configured as the first mounting plate 211, and the fourth connection structure 320 is configured as a hook. When the hook hooks the first mounting plate 211, the second connection structure cooperates with the fourth connection structure 320, so that the static contact 200 and the arc extinguishing cover 300 form a whole. In addition, the hook has the advantages of high strength, easy installation and easy disassembly, which can reduce the difficulty of installing the arc extinguishing cover 300 and improve the installation efficiency of the arc extinguishing mechanism.

[0080] Figure 8 This is a cross-sectional view of the arc extinguishing mechanism provided in the embodiment of the present application. Figure 2 as well as Figure 8 As shown, the first plate 330 of the arc extinguishing cover 300 is located between the arc extinguishing grid 120 and the first mounting plate 211 , and the hook is provided on a side of the first plate 330 facing the first mounting plate 211 .

[0081] The number of hooks can be one or two. When the number of hooks is one, the hook is disposed in the middle of the first plate 330, and the hook is disposed on the side of the first plate 330 facing the first mounting plate 211. When the number of hooks is two, the two hooks are symmetrically disposed in the middle of the first plate 330, and the two hooks are both disposed on the side of the first plate 330 facing the first mounting plate 211.

[0082] Through the above arrangement, the first plate 330 is located between the arc extinguishing grid 120 and the first mounting plate 211, so that the bottom plate of the arc extinguishing cover 300 is located between the arc extinguishing chamber 100 and the static contact 200. In this way, when the arc extinguishing chamber 100, the arc extinguishing cover 300 and the static contact 200 are assembled, the arc extinguishing chamber 100 and the static contact 200 can limit the arc extinguishing cover 300, reduce the possibility of the arc extinguishing cover 300 shaking in the arc extinguishing chamber 100, and increase the stability of the arc extinguishing cover 300 when assisting in arc extinguishing. When the hook is arranged on the side of the first plate 330 facing the first mounting plate 211, the hook can pass through the through hole 230 arranged on the first mounting plate 211, thereby hooking the first mounting plate 211, and completing the assembly of the static contact 200 and the arc extinguishing cover 300.

[0083] In a possible design, the hook is hooked with the side of the first mounting plate 211 facing away from the static contact. Alternatively, the first mounting plate 211 is provided with a first hook groove, and the hook at least partially extends into the first hook groove and hooks with the groove wall of the first hook groove.

[0084] The first hook groove can be arranged on the hole wall of the through hole 230 of the first mounting plate 211, or the first hook groove can be arranged on the side wall of the first mounting plate 211. When the first hook groove is arranged on the hole wall of the through hole 230 of the first mounting plate 211, when the second mounting structure cooperates with the fourth mounting structure, the hook bend of the hook is located in the through hole 230 of the first mounting plate 211, and the hook bend of the hook is hooked with the groove wall of the first hook groove. Correspondingly, when the first hook groove is arranged on the side wall of the first mounting plate 211, the hook bend of the hook is located at the side wall of the first mounting plate 211, and the hook bend of the hook is hooked with the groove wall of the first hook groove.

[0085] To summarize, the hook is hooked with the side of the first mounting plate 211 facing away from the static contact, which not only allows the arc extinguishing hood 300 to be installed on the static contact 200, but also allows the first mounting plate 211 to limit the hook, thereby limiting the arc extinguishing hood 300. The first hook groove can increase the stability of the arc extinguishing hood 300 when the arc extinguishing hood 300 is installed on the static contact 200, and the first hook groove can also play a certain guiding role on the arc extinguishing hood 300, thereby reducing the difficulty of installing the arc extinguishing hood 300 and improving the installation efficiency of the circuit breaker.

[0086] Fig. 9 The schematic diagram of the structure of an arc extinguishing mechanism provided in an embodiment of the present application from another perspective. Figure 5 as well as Fig. 9As shown, the mounting portion 210 further includes a second mounting plate 212, which is bent and arranged, one end of which is connected to the first mounting plate 211, and the side of the second mounting plate 212 facing away from the first mounting plate 211 is used to set the static contact. There is a gap 220 between the preset position of the second mounting plate 212 and the first mounting plate 211, and the preset position is the rest of the second mounting plate 212 except the part connected to the first mounting plate 211. The arc extinguishing cover 300 is also provided with a limit block 340, and the limit block 340 is at least partially located in the gap 220.

[0087] The second mounting plate 212 may be in the shape of a long strip, and the second mounting plate 212 is bent, one end of the second mounting plate 212 is connected to the hole wall of the through hole 230 provided in the first mounting plate 211, and the other end of the second mounting plate 212 extends above the through hole 230 provided in the first mounting plate 211. A static silver point is provided on the second mounting plate 212 located above the through hole 230 provided in the first mounting plate 211.

[0088] The limiting block 340 may be in a plate shape or a block shape. When the arc extinguishing cover 300 is mounted on the static contact 200 , part of the limiting block 340 is located in the gap 220 .

[0089] In summary, the second mounting plate 212 is bent, and one end of the second mounting plate 212 is connected to the first mounting plate 211, so that a gap 220 is generated between the preset position of the second mounting plate 212 and the first mounting plate 211. When the arc extinguishing cover 300 is installed on the static contact 200, the limit block 340 provided on the arc extinguishing cover 300 can be located in the gap 220, so that the limit block 340 and the gap 220 interact with each other, so that the static contact 200 limits the arc extinguishing cover 300, thereby reducing the possibility of the arc extinguishing cover 300 shaking in the arc extinguishing chamber 100 and increasing the stability of the arc extinguishing cover 300 when assisting in arc extinguishing.

[0090] like Figure 2 as well as Figure 4 As shown, the limit block 340 is disposed on the side of the first plate 330 facing away from the first mounting plate 211. Alternatively, the arc extinguishing cover 300 further includes a first vertical plate 350, one side of the first vertical plate 350 is connected to the first plate 330, and the limit block 340 is disposed on the first vertical plate 350.

[0091] The first vertical plate 350 may be plate-shaped and is located between the first plate 330 and the second plate 370. The first vertical plate 350 is substantially perpendicular to the first plate 330 and the second plate 370 and is connected to the first plate 330 and the second plate 370 so as to form a channel for gas to pass therethrough between the first plate 330 and the second plate 370.

[0092] In summary, the limit block 340 can be arranged on the side of the first plate 330 facing away from the first mounting plate 211, and the limit block 340 can also be arranged at the connection between the first vertical plate 350 and the first plate 330. The present application does not limit the setting position of the limit block 340, and it is only required that when the arc extinguishing cover 300 is installed on the static contact 200, the limit block 340 can be located in the gap 220. The setting position of the limit block 340 can be selected according to actual manufacturing requirements and use requirements.

[0093] like Figure 1 as well as Figure 3 As shown, the arc-extinguishing grid 120 includes a first segment 121 and a second segment 122 that are spaced apart, and the arc-extinguishing cover 300 also includes a second vertical plate 360, one side of the second vertical plate 360 ​​is connected to the first mounting plate 211, the first vertical plate 350 and the second vertical plate 360 ​​are located between the first segment 121 and the second segment 122, the first vertical plate 350 abuts against the first segment 121 of the plurality of arc-extinguishing grids 120, and the second vertical plate 360 ​​abuts against the second segment 122 of the plurality of arc-extinguishing grids 120.

[0094] The arc extinguishing grid 120 may be U-shaped. The first segment 121 and the second segment 122 may be parallel to each other, or the first segment 121 and the second segment 122 may not be arranged in parallel. The second vertical plate 360 ​​may have the same size and shape as the first vertical plate 350. The second vertical plate 360 ​​and the first vertical plate 350 may be arranged in parallel, or the second vertical plate 360 ​​and the first vertical plate 350 may not be arranged in parallel.

[0095] For example, when the first segment 121 and the second segment 122 are arranged in parallel with each other, in order to make the first vertical plate 350 abut against the first segment 121 of the plurality of arc-extinguishing grids 120, and the second vertical plate 360 ​​abut against the second segment 122 of the plurality of arc-extinguishing grids 120, at this time, the first vertical plate 350 and the second vertical plate 360 ​​may also be arranged in parallel. For another example, when the first segment 121 and the second segment 122 are not arranged in parallel, in order to make the first vertical plate 350 abut against the first segment 121 of the plurality of arc-extinguishing grids 120, and the second vertical plate 360 ​​abut against the second segment 122 of the plurality of arc-extinguishing grids 120, at this time, the first vertical plate 350 and the second vertical plate 360 ​​may also be arranged in non-parallel.

[0096] In summary, the arc extinguishing hood 300 is provided with a first vertical plate 350 and a second vertical plate 360. When the arc extinguishing hood 300 is installed on the arc extinguishing chamber 100, the first vertical plate 350 abuts against the first segments 121 of the plurality of arc extinguishing grids 120, and the second vertical plate 360 ​​abuts against the second segments 122 of the plurality of arc extinguishing grids 120. In this way, the stability of the arc extinguishing hood 300 when installed on the arc extinguishing chamber 100 can be increased, the first vertical plate 350 is supported by the plurality of first segments 121, and the second vertical plate 360 ​​is supported by the plurality of second segments 122. The arc extinguishing hood 300 can also be limited to a certain extent, thereby reducing the possibility of the arc extinguishing hood 300 shaking in the arc extinguishing chamber 100, and increasing the stability of the arc extinguishing hood 300 when assisting in arc extinguishing.

[0097] Fig.10 This is a partial structural diagram of a circuit breaker provided in an embodiment of the present application. Figure 1 as well as Fig.10 As shown, the present application also provides a circuit breaker, including a housing 400 and the arc extinguishing mechanism in the above embodiment, and the arc extinguishing mechanism is arranged in the housing 400.

[0098] The housing 400 includes an upper cover and a base, and the arc extinguishing mechanism is located in a space formed by the upper cover and the base being covered together.

[0099] In summary, the circuit breaker provided by the present application is an arc extinguishing mechanism formed by assembling the arc extinguishing chamber 100, the arc extinguishing cover 300 and the static contact 200. When assembling the circuit breaker, it is no longer necessary to install the arc extinguishing chamber 100, the arc extinguishing cover 300 and the static contact 200 separately, thus simplifying the assembly steps of the circuit breaker. On the one hand, it reduces the probability of errors when assembling the circuit breaker. On the other hand, the arc extinguishing chamber 100, the arc extinguishing cover 300 and the static contact 200 are assembled into a whole and then installed in the circuit breaker, which can also save the time cost when installing the circuit breaker and improve the production efficiency.

Claims

1. An arc extinguishing mechanism, characterized in that: include: The arc extinguishing chamber is provided with a first connecting structure; The static contact comprises a mounting portion, wherein the mounting portion is at least partially located in the arc extinguishing chamber, the mounting portion is used to set a static contact point, and the mounting portion is further provided with a second connecting structure; An arc extinguishing hood, at least partially disposed in the arc extinguishing chamber, the arc extinguishing hood being provided with a third connecting structure and a fourth connecting structure; The first connection structure cooperates with the third connection structure, and the second connection structure cooperates with the fourth connection structure, so that the arc extinguishing chamber, the static contact and the arc extinguishing cover are assembled into a whole.

2. The arc extinguishing mechanism according to claim 1, characterized in that: The arc extinguishing chamber comprises an arc extinguishing grid, the first connecting structure is a groove provided on the arc extinguishing grid, the third connecting structure is a protrusion provided on the arc extinguishing cover, and the protrusion is at least partially embedded in the groove; or, The first connection structure is a protrusion provided on the arc-extinguishing grid, and the third connection structure is a groove provided on the arc-extinguishing cover, and the protrusion is at least partially embedded in the groove.

3. The arc extinguishing mechanism according to claim 1, characterized in that: The arc extinguishing chamber includes an arc extinguishing grid, the first connecting structure is a slot provided on the arc extinguishing grid, the third connecting structure is a spring structure, one end of the spring structure is connected to the arc extinguishing cover, and the other end of the spring structure is provided with a buckle, and the buckle is buckled with the slot.

4. The arc extinguishing mechanism according to claim 1, characterized in that: The mounting portion includes a first mounting plate, the arc extinguishing cover includes a hook, the second connecting structure is the first mounting plate, and the fourth connecting structure is the hook.

5. The arc extinguishing mechanism according to claim 4, characterized in that: The arc extinguishing chamber includes an arc extinguishing grid, the arc extinguishing cover includes a first plate, the first plate is located between the arc extinguishing grid and the first mounting plate, and the hook is arranged on a side of the first plate facing the first mounting plate.

6. The arc extinguishing mechanism according to claim 4 or 5, characterized in that: The hook is hooked with a side of the first mounting plate facing away from the static contact; or, The first mounting plate is provided with a first hook groove, and the hook at least partially extends into the first hook groove and is hooked with the groove wall of the first hook groove.

7. The arc extinguishing mechanism according to claim 5, characterized in that: The mounting portion further comprises a second mounting plate, the second mounting plate is bent, one end of the second mounting plate is connected to the first mounting plate, and a side of the second mounting plate facing away from the first mounting plate is used to set the static contact; There is a gap between a preset portion of the second mounting plate and the first mounting plate, and the preset portion is the remaining portion of the second mounting plate except the portion connected to the first mounting plate; The arc extinguishing cover is also provided with a limit block, and the limit block is at least partially located in the gap.

8. The arc extinguishing mechanism according to claim 7, characterized in that: The limiting block is arranged on a side of the first plate facing away from the first mounting plate, or; The arc extinguishing cover further includes a first vertical plate, one side of which is connected to the first plate, and the limiting block is arranged on the first vertical plate.

9. The arc extinguishing mechanism according to claim 8, characterized in that: The arc-extinguishing grid includes a first segment and a second segment that are spaced apart, and the arc-extinguishing cover also includes a second vertical plate, one side of the second vertical plate is connected to the first mounting plate, the first vertical plate and the second vertical plate are located between the first segment and the second segment, the first vertical plate abuts against the first segment of the plurality of arc-extinguishing grids, and the second vertical plate abuts against the second segment of the plurality of arc-extinguishing grids.

10. A circuit breaker, characterized in that: The circuit breaker comprises a housing and an arc extinguishing mechanism according to any one of claims 1 to 9, wherein the arc extinguishing mechanism is arranged in the housing.

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