Arc extinguish chamber and circuit breaker

Abstract

The utility model provides an arc extinguish chamber and a circuit breaker. The arc extinguishing chamber comprises an arc extinguishing grid plate group, a mounting panel, a gas production structure and a first communication structure, the arc-extinguishing grid sheet group comprises a plurality of arc-extinguishing grid sheets which are tightly arranged along a first direction, and a gap is formed between two adjacent arc-extinguishing grid sheets; the two mounting panels are respectively arranged on two sides of the arc extinguishing grid sheet group along a second direction; the mounting panel comprises a first mounting surface and a second mounting surface, the first mounting surface is a surface facing the arc chute group, and the second mounting surface is a surface far away from the arc chute group; the gas production structure is arranged on the second mounting surface and is fixedly connected with the mounting panel; the first communicating structure is arranged on the mounting panel, and the first communicating structure is used for communicating the two sides of the mounting panel in the second direction; the first direction is perpendicular to the second direction, and the second direction is the same as the extending direction of the interval. And the connection stability of the gas production structure is ensured while the channel of the arc extinguishing gas is not blocked, so that the arc extinguishing effect is improved.

Description

Technical Field

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

[0002] Circuit breakers are generally used in various low-voltage power systems to connect and disconnect currents in power systems and protect lines and power equipment from overload, undervoltage, short circuit, single-phase grounding and other faults. When a fault occurs, the circuit breaker controls the contact mechanism to disconnect; an arc is generated during the disconnection process of the contact mechanism. After the arc enters the arc extinguishing chamber, the arc is extinguished by the arc extinguishing device in the arc extinguishing chamber to ensure the normal use of the circuit breaker.

[0003] In the related art, the gas generating device provided on the arc extinguishing device can generate a large amount of arc extinguishing gas in the arc extinguishing chamber to achieve effective arc extinguishing. However, since the connection point between the gas generating device and the arc extinguishing chamber will be disconnected by thermal melting due to the high temperature environment, the arc extinguishing gas cannot smoothly enter the arc extinguishing chamber, thereby reducing the arc extinguishing effect of the arc extinguishing chamber. Utility Model Content

[0004] The present application provides an arc extinguishing mechanism for a circuit breaker to solve the problem that arc extinguishing gas cannot smoothly enter an arc extinguishing chamber, thereby reducing the arc extinguishing effect of the arc extinguishing chamber.

[0005] In a first aspect, the present application provides an arc extinguishing chamber, which is arranged in an installation chamber of a circuit breaker, and the arc extinguishing chamber includes: an arc extinguishing grid group, an installation panel, a gas generating structure and a first connecting structure; the arc extinguishing grid group includes a plurality of arc extinguishing grids closely arranged along a first direction, and there is a gap between two adjacent arc extinguishing grids; two installation panels are respectively arranged on both sides of the arc extinguishing grid group along a second direction; the installation panel includes a first installation surface and a second installation surface, the first installation surface is a side facing the arc extinguishing grid group, and the second installation surface is a side away from the arc extinguishing grid group; the gas generating structure is arranged on the second installation surface and fixedly connected to the installation panel; the first connecting structure is arranged on the installation panel, and the first connecting structure is used to connect the two sides of the installation panel in the second direction; the first direction is perpendicular to the second direction, and the second direction is the same as the extension direction of the gap.

[0006] According to the first aspect, an arc extinguishing chamber is arranged in the installation chamber of the circuit breaker, and the arc extinguishing chamber includes an arc extinguishing grid group, an installation panel, a gas generating structure and a first connecting structure. The arc extinguishing grid group is composed of a plurality of arc extinguishing grids closely arranged along a first direction, and there is a gap between every two arc extinguishing grids, which is used to accommodate the arc entering the arc extinguishing grid group. Two installation panels are arranged on both sides of the arc extinguishing grid group along a second direction, and the second direction is perpendicular to the first direction and is the same as the extension direction of the gap, so that the arc extinguishing grid group and the two installation panels form an arc extinguishing space for extinguishing the arc, and prevent the arc in the arc extinguishing grid group from escaping from both sides of the arc extinguishing grid group. The installation panel includes a second installation surface away from the arc extinguishing grid group and a first installation surface facing the arc extinguishing grid group, and the gas generating structure for generating arc extinguishing gas is fixedly connected to the second installation surface, so that the installation panel is located between the gas generating structure and the arc extinguishing grid group, and the installation panel is also provided with a connecting structure for connecting the two sides of the installation panel, so that the arc extinguishing gas of the gas generating structure can reach the arc extinguishing grid group through the connecting structure. While ensuring that the channel for the arc extinguishing gas to act on the arc extinguishing grid group is not blocked, the high temperature generated by the arc extinguishing grid due to arc extinguishing is transmitted to the gas producing structure through the mounting panel and will not directly act on the gas producing structure, thereby greatly reducing the possibility of failure of the fixed connection between the gas producing structure and the second mounting surface due to high temperature, ensuring the connection stability of the gas producing structure, and allowing the arc extinguishing gas to stably and continuously enter the arc extinguishing grid group, thereby improving the arc extinguishing effect.

[0007] In a possible design, a first mounting groove is provided on the second mounting surface, and the gas-generating structure is provided in the first mounting groove; the second mounting surface is tightly attached to the inner wall of the mounting cavity of the circuit breaker, so that the first mounting groove and the inner wall form a sealed space, and the sealed space is used to prevent the gas-generating structure from escaping from the first mounting groove.

[0008] According to the embodiment, the gas-producing structure is arranged in the first mounting groove arranged on the second mounting surface, so that the second mounting surface is tightly attached to the inner wall of the arc extinguishing chamber, resulting in the first mounting groove and the inner wall of the arc extinguishing chamber forming a sealed space, and the gas-producing structure is located in the sealed space and cannot escape from the sealed space; thereby, the positioning of the gas-producing structure is achieved, and the arc extinguishing gas generated by the gas-producing structure can stably and continuously enter the arc extinguishing grid group, thereby improving the arc extinguishing effect of the arc extinguishing chamber.

[0009] In a possible design, the arc-extinguishing grid group includes a grid inlet and a grid outlet, the grid inlet is one side of the arc-extinguishing grid group in the third direction, and the grid outlet is the other side of the arc-extinguishing grid group in the third direction; a hollow structure is provided on the mounting panel, and the hollow structure and the grid inlet are located on the same side in the third direction; a protruding structure is provided on the gas generating structure, and the protruding structure passes through the hollow structure so that the protruding structure is close to the grid inlet.

[0010] According to the embodiment, in the third direction, the hollow structure arranged on the mounting panel is located on the same side as the grid inlet; the gas-producing structure produces arc-extinguishing gas under high temperature, and the protruding structure on the gas-producing structure passes through the hollow structure, so that the protruding structure is close to the grid inlet, so that the arc-extinguishing gas produced by the protruding structure part is directly gathered in large quantities at the grid inlet through the hollow structure, thereby enhancing the gas pressure in the arc-extinguishing grid group, increasing the gas pressure at the grid inlet arranged on one side of the third direction, promoting the arc-extinguishing gas to flow to the grid outlet arranged on the other side of the third direction, and increasing the flow speed of the arc-extinguishing gas and the arc, thereby improving the arc-extinguishing efficiency of the arc-extinguishing chamber.

[0011] In a possible design, the arc extinguishing chamber further includes a flame extinguishing plate, which covers the grid outlets of the arc extinguishing grid group along the third direction to absorb heat energy.

[0012] According to the embodiment, when the arc that has not been extinguished in time in the arc-extinguishing grid group passes through the grid outlet along with the arc-extinguishing gas, the flame-extinguishing plate covering the grid outlet of the arc-extinguishing grid group along the third direction absorbs the heat energy in the arc, so that the arc is disabled and extinguished, and the arc-extinguishing grid group is assisted to complete the arc extinguishing, thereby further improving the arc extinguishing effect of the arc-extinguishing chamber. In addition, the arc gas and arc-extinguishing gas passing through the flame-extinguishing plate also absorb heat energy through the flame-extinguishing plate to achieve cooling, and the arc gas and arc-extinguishing gas are discharged after cooling, thereby avoiding high-temperature damage to other equipment.

[0013] In a possible design, the arc extinguishing chamber further includes a metal mesh plate, which covers the flame extinguishing plate along the third direction and is used for absorbing metal particles.

[0014] Through this implementation, the arc extinguishing gas will produce metal particles solidified due to low temperature after being cooled by the flame extinguishing plate. The metal mesh plate covering the flame extinguishing plate absorbs the metal particles produced by the arc extinguishing gas, thereby preventing the metal particles from leaving the arc extinguishing chamber and affecting other equipment. It is ensured that the arc extinguishing chamber will not have an adverse effect on other equipment during the arc extinguishing process, thereby ensuring the reliability of the arc extinguishing chamber.

[0015] In a possible design, a first card slot, a second card slot and a third card slot are provided on the first mounting surface; the first card slot is used to clamp the arc extinguishing grid, the second card slot is used to clamp the flame extinguishing plate, and the third card slot is used to clamp the metal mesh plate.

[0016] According to the embodiment, the arc-extinguishing grid is clamped in the first clamping groove provided on the first mounting surface, so that the arc-extinguishing grid is fixed between the two mounting panels to ensure that the arc-extinguishing grid stably plays the role of arc extinguishing, thereby improving the arc-extinguishing efficiency of the arc-extinguishing chamber. The flame-extinguishing plate is clamped in the second clamping groove provided on the first mounting surface, so that the flame-extinguishing plate is fixed between the two mounting panels to ensure that the flame-extinguishing plate stably plays the role of cooling, thereby improving the arc-extinguishing efficiency of the arc-extinguishing chamber. The metal mesh plate is clamped in the third clamping groove provided on the first mounting surface, so that the metal mesh plate is fixed between the two mounting panels to ensure that the metal mesh plate stably plays the role of absorbing metal particles, thereby improving the arc-extinguishing efficiency of the arc-extinguishing chamber.

[0017] In a possible design, the arc extinguishing chamber also includes a cover plate, which is buckled at the opening of the arc extinguishing chamber along the third direction, and the cover plate is clamped on the top of the two oppositely arranged mounting panels; the cover plate is used to fix the arc extinguishing grid group, the cover plate, the flame extinguishing plate and the metal mesh plate between the two mounting panels.

[0018] According to the embodiment, the cover plate is buckled at the opening of the arc extinguishing chamber along the third direction, so that the arc extinguishing grid group, the mounting panel, the flame extinguishing plate and the metal mesh plate are fixed in the arc extinguishing chamber and cannot escape from the opening of the arc extinguishing chamber. The arc extinguishing grid group, the mounting panel, the flame extinguishing plate and the metal mesh plate can all play a stable role during the arc extinguishing process, thereby ensuring the stability of the arc extinguishing efficiency.

[0019] In a possible design, a second connecting structure is provided on the cover plate; the second connecting structure is used to connect two sides of the cover plate in the third direction.

[0020] According to the embodiment, the arc extinguishing gas in the arc extinguishing chamber flows out of the arc extinguishing chamber through the second connecting structure provided on the cover plate, so that the pressure in the arc extinguishing chamber tends to be stable to ensure the arc extinguishing efficiency of the arc extinguishing chamber.

[0021] In a second aspect, the present application provides a circuit breaker, comprising: the arc extinguishing chamber described in any one of the above embodiments, wherein one or more installation chambers are provided on the circuit breaker, and one arc extinguishing chamber is provided in each installation chamber.

[0022] The beneficial effects provided in the above-mentioned second aspect and various possible designs of the above-mentioned second aspect can refer to the beneficial effects brought about by the above-mentioned first aspect and various possible implementation methods of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 An assembly diagram of an arc extinguishing chamber and a circuit breaker provided in an embodiment of the present application;

[0025] Figure 2 An exploded view of a schematic structural diagram of an arc extinguishing chamber provided in an embodiment of the present application;

[0026] Figure 3 An assembly diagram of a mounting panel and a gas production structure provided in an embodiment of the present application;

[0027] Figure 4 A schematic diagram of the structure of a mounting panel provided in an embodiment of the present application;

[0028] Figure 5 for Figure 4 A partial enlarged view B;

[0029] Figure 6 An assembly diagram of a second installation panel and a gas production structure provided in an embodiment of the present application;

[0030] Figure 7 for Figure 6 A partial enlarged view of

[0031] Figure 8 A schematic diagram of an arc-extinguishing grid provided in an embodiment of the present application.

[0032] Description of reference numerals:

[0033] 100-arc extinguishing chamber; 200-installation chamber;

[0034] 1-arc extinguishing grid; 1a-grid inlet; 1b-grid outlet;

[0035] 2-installation panel; 21-first installation surface; 211-first card slot; 212-second card slot; 213-third card slot; 22-second installation surface; 221-first installation slot; 23-hollow structure;

[0036] 3-gas-producing structure; 31-convex structure;

[0037] 4- first communication structure;

[0038] 5- arc starting plate;

[0039] 6-flame extinguishing plate; 7-metal mesh plate; 8-cover plate; 81-fixing member; 82-connecting hole; 9-second connecting structure;

[0040] X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution 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 drawings, and do not limit the specific structure of the present application. For example, in the description of the present application, the directions or positional relationships indicated by 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", etc. are 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, rather than indicating or implying 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 limiting the present application.

[0047] In addition, the expressions of the indicated directions, such as the X direction, the Y direction, and the Z direction, used to illustrate the operation and construction of the components of the present embodiment are not absolute but relative, and although these indications are appropriate when the components of the battery pack are in the positions shown in the figures, when these positions change, these directions should be interpreted differently to correspond to the changes.

[0048] 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.

[0049] In the description of the present application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two groups (including two).

[0050] 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.

[0051] like Figure 1-Figure 5 As shown, an embodiment of the first aspect of the present application provides an arc extinguishing chamber 100, which is arranged in an installation chamber 200 of a circuit breaker, and the arc extinguishing chamber 100 includes: an arc extinguishing grid group, an installation panel 2, a gas generating structure 3 and a first connecting structure 4; the arc extinguishing grid group includes arc extinguishing grids 1 closely arranged along a first direction X; two installation panels 2 are respectively arranged on both sides of the arc extinguishing grid group along a second direction Y; the installation panel 2 includes a first installation surface 21 and a second installation surface 22, the first installation surface 21 is a side facing the arc extinguishing grid group, and the second installation surface 22 is a side away from the arc extinguishing grid group; the gas generating structure 3 is arranged on the second installation surface 22 and is fixedly connected to the installation panel 2; the first connecting structure 4 is arranged on the installation panel 2, and the first connecting structure 4 is used to connect the two sides of the installation panel 2 in the second direction Y.

[0052] The arc extinguishing grid 1 is generally made of metal. When an arc is generated between contacts in an AC low-voltage switch, such as a circuit breaker, the arc is pulled into the arc extinguishing grid group under the contraction force of magnetic lines of force, and a long arc is divided into multiple short arcs to achieve a rapid arc extinguishing function.

[0053] The arc extinguishing grid group is composed of a plurality of arc extinguishing grids. Since increasing the number of grids can improve the arc extinguishing effect, the circuit breaker generally uses an arc extinguishing grid group composed of a plurality of grids.

[0054] Specifically, the arc-extinguishing grid group in the embodiment of the present application is composed of a plurality of arc-extinguishing grids closely arranged along the first direction X.

[0055] The mounting panel 2 is a plate-like structure arranged on the side of the arc-extinguishing grid group.

[0056] Specifically, since the arc extinguishing grids 1 in the arc extinguishing grid group are arranged along the first direction X, there is a gap between each of the arranged arc extinguishing grids 1, and the direction of the gap is different from the first direction X. Hereinafter, the second direction Y refers to the direction of the gap. Therefore, the mounting panels 2 are respectively arranged on both sides of the arc extinguishing grid group along the second direction Y, playing the role of isolation and blocking, controlling the arc in the arc extinguishing grid group, and providing an arc extinguishing grid mounting structure, so that each arc extinguishing grid 1 does not directly contact, that is, there is a certain gap between two adjacent arc extinguishing grids 1.

[0057] In addition, the general installation panel 2 uses insulating materials, such as thermosetting plastic DMC, which separates the arc extinguishing grids 1 and makes the arc extinguishing grids 1 completely insulated. At the same time, the two relatively arranged installation panels 2 can completely limit the arc entering the arc extinguishing chamber 100 within the arc extinguishing chamber 100, and can also absorb part of the heat of the arc, thereby promoting the extinction of the arc.

[0058] The gas generating structure 3 is a structure installed on the mounting panel 2, and can be in any shape such as a sheet or a block, which is not specifically limited here. The gas generating structure 3 can be installed on the mounting panel 2 by welding, riveting or bonding, which is not specifically limited here.

[0059] Specifically, the circuit breaker generates high temperature during the breaking process, and the gas generating structure 3 generates a large amount of arc extinguishing gas under the action of high temperature to improve the arc extinguishing effect. In addition, the gas generating structure 3 is added to the installation panel 2, and the arc extinguishing gas generated by the gas generating structure 3 enters the arc extinguishing grid group in large quantities, so that the air pressure in the space formed by the arc extinguishing grid group and the installation panel 2 increases, and the high-pressure gas drives the rapid arc to move toward the flame extinguishing sheet 6, so that the arc is cooled, thereby achieving a better arc extinguishing effect.

[0060] Furthermore, one side of each mounting panel 2 facing the arc extinguishing grid group is a first mounting surface 21, and one side away from the arc extinguishing grid group is a second mounting surface 22, and the gas generating structure 3 is mounted on the second mounting surface 22. It can be understood that the mounting panel 2 divides the space into two sides, the first mounting surface 21 and the arc extinguishing grid group are on the inner side, and the second mounting surface 22 and the gas generating structure 3 are on the outer side.

[0061] Since the gas-producing structure 3 is welded, riveted or bonded to the mounting panel 2, excessively high temperatures may cause the welding points, riveting points or bonding points to melt and fail, thereby disconnecting the connection between the gas-producing structure 3 and the mounting panel 2. After the connection between the gas-producing structure 3 and the mounting panel 2 is disconnected, the position of the gas-producing structure 3 cannot be fixed, and the arc-extinguishing gas generated by the gas-producing structure 3 cannot enter the arc-extinguishing grid group, thereby greatly reducing the arc-extinguishing effect.

[0062] Therefore, the gas-producing structure 3 is installed on the second mounting surface 22, and the high temperature generated inside the arc-extinguishing chamber 100 is conducted through the mounting panel 2 and will not directly act on the gas-producing structure 3, thereby greatly reducing the possibility of melting failure of the riveting points or bonding points, ensuring the connection stability of the gas-producing structure 3, and allowing the arc-extinguishing gas to stably and continuously enter the arc-extinguishing grid group, thereby improving the arc-extinguishing effect.

[0063] The first communication structure 4 is a through hole or a through groove arranged on the installation panel 2, so that the gases on both sides of the installation panel 2 can flow to each other.

[0064] Specifically, the first connecting structure 4 is a through hole arranged on the mounting panel 2, and the through hole penetrates the first mounting surface 21 and the second mounting surface 22, so that the arc-extinguishing gas generated by the gas-producing structure 3 installed on the second mounting surface 22 under the action of high temperature can reach the first mounting surface 21 through the through hole, and enter the arc-extinguishing grid group to participate in the arc-extinguishing process.

[0065] The arc extinguishing chamber 100 provided by the embodiment of the first aspect of the present application is arranged in the installation chamber 200 of the circuit breaker, and the arc extinguishing chamber 100 includes an arc extinguishing grid group, an installation panel 2, a gas generating structure 3 and a first connecting structure 4. The arc extinguishing grid group is composed of a plurality of arc extinguishing grids closely arranged along a first direction X, and there is a gap between every two arc extinguishing grids, which is used to accommodate the arc entering the arc extinguishing grid group. Two installation panels 2 are arranged on both sides of the arc extinguishing grid group along a second direction Y, and the second direction Y is perpendicular to the first direction X and is the same as the extension direction of the gap, so that the arc extinguishing grid group and the two installation panels 2 form an arc extinguishing space for extinguishing the arc, and prevent the arc in the arc extinguishing grid group from escaping from both sides of the arc extinguishing grid group. The mounting panel 2 includes a second mounting surface 22 away from the arc-extinguishing grid group and a first mounting surface 21 facing the arc-extinguishing grid group. The gas-generating structure 3 for generating arc-extinguishing gas is fixedly connected to the second mounting surface 22, so that the mounting panel 2 is located between the gas-generating structure 3 and the arc-extinguishing grid group. The mounting panel 2 is also provided with a connecting structure for connecting the two sides of the mounting panel 2, so that the arc-extinguishing gas of the gas-generating structure 3 can reach the arc-extinguishing grid group through the connecting structure. While ensuring that the passage for the arc-extinguishing gas to act on the arc-extinguishing grid group is not blocked, the high temperature generated by the arc-extinguishing grid 1 due to arc extinguishing is conducted to the gas-generating structure 3 through the mounting panel 2, and will not directly act on the gas-generating structure 3, which greatly reduces the possibility of failure of the fixed connection between the gas-generating structure 3 and the second mounting surface 22 due to high temperature, ensures the connection stability of the gas-generating structure 3, and enables the arc-extinguishing gas to stably and continuously enter the arc-extinguishing grid group, thereby improving the arc-extinguishing effect.

[0066] like Figure 6 and Figure 7 As shown, in some embodiments, a first mounting groove 221 is provided on the second mounting surface 22, and the gas-generating structure 3 is provided in the first mounting groove 221; the second mounting surface 22 is tightly attached to the inner wall of the arc extinguishing chamber 200, so that the first mounting groove 221 and the inner wall form a sealed space, and the sealed space is used to prevent the gas-generating structure 3 from escaping from the first mounting groove 221.

[0067] Specifically, according to the above content, it can be known that the second mounting surface 22 of the mounting panel 2 is equivalent to the outer wall of the arc extinguishing chamber 100. In order to make the second mounting surface 22 fit with the inner wall of the mounting cavity 200 of the circuit breaker, a first mounting groove 221 is provided on the second mounting surface 22 to prevent the gas producing structure 3 from being formed, and the depth of the first mounting groove 221 should be greater than or equal to the thickness of the gas producing structure 3 in the depth direction, so that after the gas producing structure 3 is placed in the first mounting groove 221, the second mounting surface 22 can still fit with the inner wall of the mounting cavity 200 of the circuit breaker.

[0068] In addition, when the second mounting surface 22 is in contact with the inner wall of the mounting cavity 200 of the circuit breaker, the first mounting groove 221 and the inner wall of the mounting cavity 200 of the circuit breaker form a sealed space, and the gas generating structure 3 is located in the sealed space and cannot escape from the sealed space. Thus, the positioning of the gas generating structure 3 is achieved, so that the arc extinguishing gas generated by the gas generating structure 3 can stably and continuously enter the arc extinguishing grid group, thereby improving the arc extinguishing effect of the arc extinguishing chamber 100.

[0069] Furthermore, the first mounting groove 221 and the inner wall of the mounting cavity 200 of the circuit breaker can restrict the position of the gas-producing structure 3 in all directions; therefore, when the fixed connection between the gas-producing structure 3 and the second mounting surface 22 fails due to high temperature, the arc-extinguishing gas generated by the gas-producing structure 3 can also stably and continuously enter the arc-extinguishing grid group, further improving the arc-extinguishing effect of the arc-extinguishing chamber 100.

[0070] According to the embodiment, the gas-producing structure 3 is arranged in the first mounting groove 221 on the second mounting surface 22, so that the second mounting surface 22 is tightly attached to the inner wall of the mounting cavity 200 of the circuit breaker, resulting in the first mounting groove 221 and the inner wall of the arc extinguishing chamber 100 forming a sealed space, and the gas-producing structure 3 is located in the sealed space and cannot escape from the sealed space; thereby, the positioning of the gas-producing structure 3 is achieved, and the arc-extinguishing gas generated by the gas-producing structure 3 can stably and continuously enter the arc-extinguishing grid group, thereby improving the arc-extinguishing effect of the arc-extinguishing chamber 100.

[0071] like Figure 8 As shown, in some embodiments, the arc extinguishing grid group includes a grid inlet 1a and a grid outlet 1b, the grid inlet 1a is one side of the arc extinguishing grid group in the third direction Z, and the grid outlet 1b is the other side of the arc extinguishing grid group in the third direction Z; a hollow structure 23 is provided on the mounting panel 2, and the hollow structure 23 and the grid inlet 1a are located on the same side in the third direction Z; a protruding structure 31 is provided on the gas producing structure 3, and the protruding structure 31 passes through the hollow structure 23, so that the protruding structure 31 is close to the grid inlet 1a.

[0072] The arc extinguishing principle of the arc extinguishing grid group is to separate the arc into multiple short arcs after introducing the arc into the arc extinguishing grid group, and use arc extinguishing gas and other arc extinguishing structures to blow the short arc in the arc extinguishing grid group toward the grid outlet, and achieve the purpose of arc extinguishing in the process. Under high current conditions, the grid inlet 1a is the position where the arc and arc extinguishing gas enter the arc extinguishing grid group, and the grid outlet 1b is the position where the arc and arc extinguishing gas flow out. The arc extinguishing gas drives the arc to pass through the arc extinguishing grid group, and the arc is separated in the process of passing through the arc extinguishing grid group, and the arc extinguishing gas drives it to flow out from the grid outlet 1b.

[0073] Specifically, since there is a blockage of the arc extinguishing grid group in the first direction X and a blockage of the installation panel 2 in the second direction Y, the direction in which the arc and the arc extinguishing gas can flow is a third direction Z that is perpendicular to both the first direction X and the second direction Y. It can be understood that the third direction Z is a direction from the bottom of the arc extinguishing chamber 100 toward the opening of the arc extinguishing chamber 100, and the grid inlet 1a is close to the opening of the arc extinguishing chamber 100, and the grid outlet 1b is far from the opening of the arc extinguishing chamber 100.

[0074] According to the embodiment, in the third direction Z, the hollow structure 23 arranged on the mounting panel 2 is located on the same side as the grid inlet 1a; the gas-producing structure 3 generates arc-extinguishing gas under the action of high temperature, and the protruding structure 31 on the gas-producing structure 3 passes through the hollow structure 23, so that the protruding structure 31 is close to the grid inlet 1a, so that the arc-extinguishing gas generated by the protruding structure 31 is directly gathered in large quantities at the grid inlet 1a through the hollow structure 23, thereby enhancing the gas pressure in the arc-extinguishing grid group, increasing the gas pressure at the grid inlet 1a arranged on one side of the third direction Z, promoting the arc-extinguishing gas to flow to the grid outlet 1b arranged on the other side of the third direction Z, and improving the flow speed of the arc-extinguishing gas and the arc, thereby improving the arc-extinguishing efficiency of the arc-extinguishing chamber 100.

[0075] like Figure 2 As shown, in some embodiments, the arc extinguishing chamber also includes an arc-striking plate 5 arranged on one side of the arc extinguishing grid group, and the arc-striking plate 5 includes an extension portion and a bending portion extending along a third direction Z; the first end of the extension portion is close to the grid outlet 1b, and the second end of the extension portion is close to the grid inlet 1a; the first end of the bending portion is connected to the second end of the bending portion, and the second end of the bending portion is bent toward the direction of the grid inlet 1a.

[0076] The arc striking plate 5 can be made of metal material, and is used to introduce the external arc into the arc striking plate and guide the moving direction of the arc.

[0077] According to the embodiment, the first end of the extension portion is close to the grid inlet 1a, and the second end of the extension portion is close to the grid outlet 1b, so that the extension portion can completely cover the arc extinguishing grid group in the third direction Z, so that the arc-starting plate 5 can introduce the arc falling into any position of the arc extinguishing chamber 100, thereby improving the arc extinguishing efficiency of the arc extinguishing chamber 100. The first end of the bent portion is connected to the second end of the extension portion, and the second end of the bent portion is bent toward the grid inlet 1a, so that the arc introduced into the arc-starting plate 5 enters the arc extinguishing grid group through the grid inlet 1a, avoiding the arc from escaping, thereby improving the arc extinguishing efficiency of the arc extinguishing chamber 100.

[0078] In some embodiments, the arc extinguishing chamber 100 further includes a flame extinguishing plate 6, which covers the grid outlet 1b of the arc extinguishing grid group along the third direction Z and can be used to extinguish the arc and absorb heat energy.

[0079] The flame extinguishing plate 6 is usually made of special materials, such as non-woven materials, ceramics, melamine boards, asbestos fibers, etc. These materials have good heat insulation and heat absorption, can absorb the heat energy generated by the arc and extinguish it as soon as possible, and help prevent the arc from continuing. In addition, the arc gas and arc extinguishing gas passing through the flame extinguishing plate 6 can also be cooled by the flame extinguishing plate 6.

[0080] According to the embodiment, when the arc that has not been extinguished in time in the arc-extinguishing grid group passes through the grid outlet 1b along with the arc-extinguishing gas, the flame-extinguishing plate 6 covering the grid outlet 1b of the arc-extinguishing grid group along the third direction Z absorbs the heat energy in the arc, so that the arc is disabled and extinguished, and the arc-extinguishing grid group is assisted to complete the arc extinguishing, thereby further improving the arc extinguishing effect of the arc-extinguishing chamber 100. In addition, the arc gas and arc-extinguishing gas passing through the flame-extinguishing plate 6 also absorb heat energy through the flame-extinguishing plate 6 to achieve cooling, and the arc gas and arc-extinguishing gas are discharged after cooling, thereby avoiding high-temperature damage to other equipment.

[0081] like Figure 2 As shown, in some embodiments, the arc extinguishing chamber 100 further includes a metal mesh plate 7, which covers the flame extinguishing plate 6 along the third direction Z for absorbing metal particles.

[0082] The metal mesh plate 7 is usually made of metal wires or metal strips woven or welded, or can be made of a whole metal plate through drilling. Different pore sizes and materials can be selected as needed to adsorb metal particles.

[0083] According to the embodiment, the arc extinguishing gas will produce metal particles solidified due to low temperature after being cooled by the flame extinguishing plate 6. The metal mesh plate 7 covering the flame extinguishing plate 6 absorbs the metal particles produced by the arc extinguishing gas to prevent the metal particles from leaving the arc extinguishing chamber 100 and affecting other equipment, thereby ensuring that the arc extinguishing chamber 100 will not have an adverse effect on other equipment during the arc extinguishing process, thereby ensuring the reliability of the arc extinguishing chamber 100.

[0084] like Figure 4 As shown, in some embodiments, a first card slot 211, a second card slot 212 and a third card slot 213 are provided on the first mounting surface 21; the first card slot 211 is used to clamp the arc extinguishing grid 1, the second card slot 212 is used to clamp the flame extinguishing plate 6, and the third card slot 213 is used to clamp the metal mesh plate 7.

[0085] The arc-extinguishing grid 1, the flame-extinguishing plate 6 and the metal mesh plate 7 are all plate-like structures. The installation methods of the plate-like structure usually include bolt connection, welding or slot connection. The bolt connection method is only applicable to plate-like structures with larger sizes. It is difficult to leave a bolt connection position on a small-sized plate-like structure. The welding method is also not applicable to the high temperature environment in the arc-extinguishing chamber 100. The high temperature can easily cause the welding point to fall off, thereby making the connection point of the plate-like structure invalid. The slot connection method is not affected by size and temperature, and is easy to disassemble and replace, and is more suitable for application in the arc-extinguishing chamber 100.

[0086] Specifically, the slot connection includes a plate-like structure and a slot for snapping the plate-like structure, and each plate-like structure corresponds to a slot. For example, the arc-extinguishing grid group includes an arc-extinguishing grid group, two flame-extinguishing plates 6, and a group of metal mesh plates 7. The first mounting surface 21 needs to be provided with a first slot 211 for mounting each arc-extinguishing grid 1 in the arc-extinguishing grid group, two second slots 212, and a third slot 213 for mounting the group of metal mesh plates, and the metal mesh plates can be stacked.

[0087] Furthermore, the arc extinguishing grid group, the flame extinguishing plate 6 and the metal mesh plate 7 are arranged between the two mounting panels 2, and the first mounting surfaces 21 on the two mounting panels 2 are provided with a first clamping groove, a second clamping groove and a third clamping groove. This is equivalent to that in the second direction Y, both ends of the arc extinguishing grid group, the arc striking plate 5, the flame extinguishing plate 6 and the metal mesh plate 7 are connected by clamping grooves, thereby fixing the connection positions of the arc extinguishing grid 1, the flame extinguishing plate 6 and the metal mesh plate 7, so as to ensure that the arc extinguishing grid 1, the flame extinguishing plate 6 and the metal mesh plate 7 can stably play the role of arc extinguishing, cooling and adsorbing metal particles, thereby improving the arc extinguishing efficiency of the arc extinguishing chamber 100.

[0088] According to the embodiment, the arc-extinguishing grid 1 is clamped in the first clamping groove 211 provided on the first mounting surface 21, so that the arc-extinguishing grid group is fixed between the two mounting panels 2, so as to ensure that the arc-extinguishing grid group stably plays the role of arc extinguishing, thereby improving the arc-extinguishing efficiency of the arc-extinguishing chamber 100. The flame-extinguishing plate 6 is clamped in the second clamping groove 105 provided on the first mounting surface 21, so that the flame-extinguishing plate 6 is fixed between the two mounting panels 2, so as to ensure that the flame-extinguishing plate 6 stably plays the role of cooling, thereby improving the arc-extinguishing efficiency of the arc-extinguishing chamber 100. The metal mesh plate 7 is clamped in the third clamping groove 213 provided on the first mounting surface 21, so that the metal mesh plate 7 is fixed between the two mounting panels 2, so as to ensure that the metal mesh plate 7 stably plays the role of absorbing metal particles, thereby improving the arc-extinguishing efficiency of the arc-extinguishing chamber 100.

[0089] like Figure 1-Figure 3 As shown, in some embodiments, the arc extinguishing chamber 100 also includes a cover plate 8, which is buckled at the opening of the arc extinguishing chamber 100 along the third direction Z to fix the installation positions of the arc extinguishing grid group, the mounting panel 2, the arc striking plate 5, the flame extinguishing plate 6 and the metal mesh plate 7.

[0090] In order to prevent the arc from escaping from the arc extinguishing chamber 100 , it is necessary to close the opening of the arc extinguishing chamber 100 so that the arc is extinguished in the arc extinguishing chamber.

[0091] In addition, the arc extinguishing chamber 100 is fixed in the installation cavity of the circuit breaker, so that the arc extinguishing chamber 100 can stably perform the arc extinguishing process to ensure the stability of the arc extinguishing efficiency.

[0092] In some embodiments, the arc extinguishing chamber 100 can be fixed in the installation cavity 200 of the circuit breaker by bolt connection, welding, riveting or clamping, etc., which is not specifically limited here.

[0093] Specifically, Figure 1 and Figure 3 As shown, the cover plate 8 of the arc extinguishing chamber 100 is provided with a connecting hole 82, and the arc extinguishing chamber 100 is fixed in the installation cavity 200 of the circuit breaker through a fixing member 81. The fixing member 81 here can be a bolt or a positioning pin.

[0094] According to the embodiment, the cover plate 8 of the arc extinguishing chamber 100 is buckled at the opening of the mounting cavity 200 of the circuit breaker along the third direction Z, so that the arc extinguishing chamber can be fastened to the circuit breaker. The arc extinguishing grid group, the mounting panel 2, the arc striking plate 5, the flame extinguishing plate 6 and the metal mesh plate 7 can all function stably during the arc extinguishing process, thereby ensuring the stability of the arc extinguishing efficiency.

[0095] In some embodiments, Figure 2 As shown, a second connecting structure 9 is provided on the cover plate 8 ; the second connecting structure 9 is used to connect two sides of the cover plate 8 in the third direction Z.

[0096] The second connecting structure 9 is a through hole or a through groove arranged on the cover plate 8, so that the substances on both sides of the cover plate 8 can flow to each other.

[0097] Specifically, the gas flowing out of the grid outlet 1b can flow out of the arc extinguishing chamber 100 through the second connecting structure 9, thereby preventing the arc extinguishing gas from accumulating in large quantities above the grid outlet 1b, causing unstable pressure in the arc extinguishing chamber 100, and further affecting the arc extinguishing efficiency.

[0098] According to this embodiment, the gas in the arc extinguishing chamber 100 flows out of the arc extinguishing chamber 100 through the second connecting structure 9 provided on the cover plate 8, so that the pressure in the arc extinguishing chamber 100 tends to be stable to ensure the arc extinguishing efficiency of the arc extinguishing chamber 100.

[0099] An embodiment of the second aspect of the present application provides a circuit breaker, comprising: the arc extinguishing chamber 100 described in any of the above embodiments, one or more installation chambers 200 are arranged on the circuit breaker, and an arc extinguishing chamber 100 is arranged in each installation chamber 200.

[0100] The beneficial effects provided in the above-mentioned second aspect and various possible designs of the above-mentioned second aspect can refer to the beneficial effects brought about by the above-mentioned first aspect and various possible implementation methods of the first aspect, and will not be repeated here.

[0101] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0102] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An arc extinguishing chamber, which is arranged in an installation chamber of a circuit breaker, characterized in that: include: An arc-extinguishing grid group, a mounting panel, a gas-generating structure and a first connecting structure; The arc-extinguishing grid group includes a plurality of arc-extinguishing grids closely arranged along a first direction, and there is a gap between two adjacent arc-extinguishing grids; The two mounting panels are respectively arranged on both sides of the arc-extinguishing grid group along the second direction; the mounting panel comprises a first mounting surface and a second mounting surface, the first mounting surface is a surface facing the arc-extinguishing grid group, and the second mounting surface is a surface away from the arc-extinguishing grid group; The gas generating structure is arranged on the second mounting surface and is fixedly connected to the mounting panel; The first connecting structure is arranged on the installation panel, and the first connecting structure is used to connect two sides of the installation panel in the second direction; The first direction is perpendicular to the second direction, and the second direction is the same as an extending direction of the interval.

2. The arc extinguishing chamber according to claim 1, characterized in that: A first mounting groove is provided on the second mounting surface, and the gas generating structure is provided in the first mounting groove; The second mounting surface is closely attached to the inner wall of the arc extinguishing chamber, so that the first mounting groove and the inner wall form a sealed space, and the sealed space is used to prevent the gas generating structure from escaping from the first mounting groove.

3. The arc extinguishing chamber according to claim 1 or 2, characterized in that: The arc-extinguishing grid group includes a grid inlet and a grid outlet, wherein the grid inlet is one side of the arc-extinguishing grid group in the third direction, and the grid outlet is the other side of the arc-extinguishing grid group in the third direction; The installation panel is provided with a hollow structure, and the hollow structure and the grid plate inlet are located on the same side in the third direction; A protruding structure is arranged on the gas generating structure, and the protruding structure penetrates through the hollow structure so that the protruding structure is close to the grid plate inlet.

4. The arc extinguishing chamber according to claim 3, characterized in that: It also includes a flame extinguishing plate, which covers the grid outlets of the arc extinguishing grid group along the third direction and is used for absorbing heat energy.

5. The arc extinguishing chamber according to claim 4, characterized in that: It also includes a metal mesh plate, which is covered on the flame extinguishing plate along the third direction and is used for absorbing metal particles.

6. The arc extinguishing chamber according to claim 5, characterized in that: The first mounting surface is provided with a first card slot, a second card slot and a third card slot; The first clamping slot is used for clamping the arc extinguishing grid, the second clamping slot is used for clamping the flame extinguishing plate, and the third clamping slot is used for clamping the metal mesh plate.

7. The arc extinguishing chamber according to claim 6, characterized in that: It also includes a cover plate, which is buckled at the opening of the arc extinguishing chamber along the third direction, and the cover plate is clamped on the top of the two oppositely arranged installation panels; the cover plate is used to fix the arc extinguishing grid group, the cover plate, the flame extinguishing plate and the metal mesh plate between the two installation panels.

8. The arc extinguishing chamber according to claim 7, characterized in that: The cover plate is provided with a second connecting structure; The second connecting structure is used to connect two sides of the cover plate in the third direction.

9. A circuit breaker, characterized in that: Comprising the arc extinguishing chamber described in any one of claims 1 to 8, the circuit breaker is provided with one or more installation chambers, and each of the installation chambers is provided with an arc extinguishing chamber.

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