Arc extinguish chamber and frame-type switch
By designing a vertically arranged multiple grids and an arc extinguishing chamber with a recessed structure in a frame circuit breaker, the problem of insufficient arc extinguishing ability at high voltage is solved, and more efficient arc extinguishing is achieved, suitable for higher voltage pass-through Break.
Patent Information
- Application Number
- CN202420119121.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-17
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-01-17
AI Technical Summary
When existing frame circuit breakers are opened under high voltage and high current conditions, the arc extinguishing capacity of the arc extinguishing chamber is insufficient, resulting in difficulty in extinguishing the arc and low efficiency.
An arc extinguishing chamber including a first arc extinguishing part and a second arc extinguishing part arranged at intervals is designed. The grids arranged in the vertical direction form an arc-induced space, and the arc flow is accelerated through the recessed structure and the magnetic increase block. Improve arc extinguishing efficiency.
By adding the grid and recessed structure, the arc extinguishing capacity and efficiency of the arc extinguishing chamber are improved, so that the arc can be extinguished faster, suitable for higher voltage on and off.
Smart Images
Figure CN222338214U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to an arc extinguishing chamber and a frame-type switch. Background Art
[0002] Frame type circuit breaker, also known as universal type circuit breaker, is a mechanical switch that can connect, carry and disconnect current under normal circuit conditions, and can also connect, carry for a certain time and disconnect current under specified abnormal circuit conditions. Universal type circuit breaker is used to distribute electric energy and protect circuits and power equipment from overload, undervoltage, short circuit, etc. This type of circuit breaker generally has a steel frame, and all parts are installed in the frame. It has a large capacity and can be equipped with multiple function releases and more auxiliary contacts. It has a high breaking capacity and thermal stability, so it is often used in places that require high breaking capacity and selective protection.
[0003] The frame-type circuit breaker in the prior art includes a static contact and a moving contact arranged roughly on the left and right. An arc extinguishing chamber is arranged on the moving path of the moving contact during the opening process to extinguish the arc. The arc extinguishing chamber includes a plurality of arc extinguishing grids arranged along the moving path of the moving contact, and arc-starting plates are arranged at both ends of the arc extinguishing grids. The voltage of the frame-type switch in the prior art can only reach DC1500V. According to the latest low-voltage electrical appliance industry standard development plan, it will develop to AC2000V and DC3000V. When the frame-type circuit breaker in the prior art is used to work under high voltage and high current, the arc energy is large when opening, and the arc extinguishing capacity of the arc extinguishing chamber is insufficient, resulting in low arc extinguishing efficiency and difficulty in extinguishing the arc. Utility Model Content
[0004] The purpose of the present application is to provide an arc extinguishing chamber and a frame-type switch to address the deficiencies in the prior art, so as to solve the problem of insufficient arc extinguishing capacity of the arc extinguishing chamber in the prior art.
[0005] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:
[0006] On the one hand, an embodiment of the present application provides an arc extinguishing chamber, including: a first arc extinguishing portion and a second arc extinguishing portion arranged at intervals, the first arc extinguishing portion including a plurality of first grid plates arranged along a first direction, the second arc extinguishing portion including a plurality of second grid plates arranged along a second direction, the second arc extinguishing portion overlaps with a projection of the first arc extinguishing portion in the second direction, the second arc extinguishing portion extends toward a movement direction of a moving contact when the switch is opened, the first arc extinguishing portion and the second arc extinguishing portion enclose an arc striking space, the first direction is perpendicular to the second direction, a first arc striking plate is arranged on one side of the first arc extinguishing portion, the first arc striking plate is used to be connected to a stationary contact plate, the first arc striking plate extends into the arc striking space and is recessed toward the second arc extinguishing portion to form a recessed structure to reduce the distance between the first arc striking plate and the second arc extinguishing portion.
[0007] As an implementable manner, a first magnetization block is disposed in the recessed structure.
[0008] As an implementable manner, the side surface of the recessed structure close to the second arc extinguishing portion is an inclined surface, which extends toward the movement direction of the moving contact when the switch is opened and is inclined toward the direction close to the static contact.
[0009] As an implementable manner, second magnetizing blocks are respectively provided at two ends of the second arc extinguishing portion.
[0010] As an implementable manner, in the second direction, the distance between the first arc extinguishing portion and the second arc extinguishing portion is greater than 2d, wherein d is the distance between two adjacent grid pieces in the second arc extinguishing portion.
[0011] As an implementable manner, a plurality of second grid sheets are arranged at equal intervals, a plurality of first grid sheets are arranged at equal intervals, and a distance between two adjacent second grid sheets is greater than a distance between two adjacent first grid sheets.
[0012] As an implementable method, the last first grid piece and the second grid piece on the side where the first arc extinguishing part and the second arc extinguishing part are close to each other are connected by an inclined connecting plate, one end of the connecting plate is connected to the side of the first grid piece close to the second arc extinguishing part, and the other end is connected to the side of the second grid piece close to the static contact.
[0013] As an implementable manner, the angle between the connecting plate and the second grid plate is between 5° and 45°.
[0014] As an implementable manner, a second arc-starting plate is provided on a side of the second arc-extinguishing portion away from the first arc-extinguishing portion, and the second arc-starting plate is bent toward the first arc-extinguishing portion to form an arc-starting opening with the side wall of the recessed structure.
[0015] On the other hand, an embodiment of the present application provides a frame-type switch, comprising a shell, a contact assembly arranged in the shell and the above-mentioned arc extinguishing chamber, wherein the contact assembly comprises a static contact and a moving contact driven to move in contact with or separate from the static contact, and the arc extinguishing chamber is arranged on the path of the moving contact when the switch is opened.
[0016] The beneficial effects of this application include:
[0017] The present application provides an arc extinguishing chamber, comprising: a first arc extinguishing portion and a second arc extinguishing portion arranged at intervals, the first arc extinguishing portion comprising a plurality of first grids arranged along a first direction, the second arc extinguishing portion comprising a plurality of second grids arranged along a second direction, the first direction being perpendicular to the second direction, the second arc extinguishing portion partially overlapping with a projection of the first arc extinguishing portion in the second direction, the second arc extinguishing portion extending toward a movement direction of a moving contact when the switch is opened, more grids are arranged without changing the arrangement of components inside an existing frame-type switch, the first arc extinguishing portion and the second arc extinguishing portion are enclosed to form an arc striking space, a first arc striking plate is arranged on one side of the first arc extinguishing portion, the first arc striking plate is used to be connected to a stationary contact, when the switch is opened, that is, when the moving contact is separated from the stationary contact, the moving contact rotates along the arrangement direction of the first arc extinguishing portion and the second arc extinguishing portion, so that the arc enters the first arc extinguishing portion and the second arc extinguishing portion from the arc striking space, so that the first grid and the second grid extinguish the arc, and the arc extinguishing capacity of the arc extinguishing chamber is improved by arranging more grids. In addition, the first arc-starting plate extends into the arc-starting space and is recessed toward the second arc-extinguishing portion to form a recessed structure to reduce the distance between the first arc-starting plate and the second arc-extinguishing portion. On the one hand, the arc-starting point is close to the overlapping portion of the first arc-extinguishing portion and the second arc-extinguishing portion, where there are more grid plates, so that the arc-extinguishing ability here is stronger; on the other hand, a narrower channel is formed at the recessed portion to accelerate the flow of the arc, so that the generated arc can be extinguished more quickly, thereby improving the arc-extinguishing efficiency. The arc-extinguishing voltage of the arc-extinguishing chamber is increased by improving the arc-extinguishing ability and arc-extinguishing efficiency. Therefore, the embodiment of the present application can solve the problem of insufficient arc-extinguishing ability of the arc-extinguishing chamber in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 One of the structural schematic diagrams of an arc extinguishing chamber provided in an embodiment of the present application;
[0020] Figure 2 A second structural schematic diagram of an arc extinguishing chamber provided in an embodiment of the present application;
[0021] Figure 3 A third structural schematic diagram of an arc extinguishing chamber provided in an embodiment of the present application;
[0022] Figure 4 A fourth structural schematic diagram of an arc extinguishing chamber provided in an embodiment of the present application;
[0023] Figure 5A schematic diagram of the structure of a frame-type switch provided in an embodiment of the present application.
[0024] Icons: 100 - arc extinguishing chamber; 110 - first arc extinguishing part; 111 - first grid; 112 - first arc-starting plate; 113 - recessed structure; 114 - first magnetizing block; 120 - second arc extinguishing part; 121 - second grid; 123 - second arc-starting plate; 130 - connecting plate; 210 - moving contact; 220 - stationary contact. DETAILED DESCRIPTION
[0025] 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, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.
[0026] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. It should be noted that, in the absence of conflict, the various features in the embodiments of the present application can be combined with each other, and the combined embodiments are still within the scope of protection of the present application.
[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0028] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0029] In one aspect of an embodiment of the present application, an arc extinguishing chamber 100 is provided. Figure 1 , Figure 2 and Figure 5 As shown, it includes: a first arc extinguishing portion 110 and a second arc extinguishing portion 120 arranged at intervals, and the first arc extinguishing portion 110 includes a plurality of arc extinguishing portions along a first direction ( Figure 2 The first grid pieces 111 are arranged in the vertical direction, and the second arc extinguishing part 120 includes a plurality of grid pieces 111 arranged in the second direction ( Figure 2The second grid piece 121 is arranged in the horizontal direction, the second arc extinguishing portion 120 overlaps with the projection of the first arc extinguishing portion 110 in the second direction, the first arc extinguishing portion 110 and the second arc extinguishing portion 120 enclose an arc striking space, one side of the first arc extinguishing portion 110 is used to set the static contact 220, and the first direction is perpendicular to the second direction.
[0030] The arc extinguishing chamber 100 provided in the embodiment of the present application is applied to a frame-type switch. The frame-type switch includes a static contact 220 and a moving contact 210 driven to contact or separate from the static contact 220. When the moving contact 210 is separated from the static contact 220, an arc is generated. The arc extinguishing chamber 100 provided in the embodiment of the present application is arranged near the moving contact 210 and the static contact 220 to extinguish the arc. Specifically, the arc extinguishing chamber 100 of the embodiment of the present application includes a first arc extinguishing portion 110 and a second arc extinguishing portion 120, the first arc extinguishing portion 110 includes a plurality of first grid pieces 111 arranged along a first direction, the second arc extinguishing portion 120 includes a plurality of second grid pieces 121 arranged along a second direction, the first direction is perpendicular to the second direction, so that the first arc extinguishing portion 110 and the second arc extinguishing portion 120 are in a transverse folded shape, the moving contact 210 and the stationary contact 220 are arranged at relative positions in the transverse folded shape, and when the moving contact 210 is separated from the stationary contact 220, the moving contact 210 rotates along the transverse folding direction, and the generated arc is extinguished by the first arc extinguishing portion 110 and the second arc extinguishing portion 120, thereby achieving arc extinguishing.
[0031] In the embodiment of the present application, a first arc extinguishing portion 110 and a second arc extinguishing portion 120 are arranged in the arc extinguishing chamber 100, and the arrangement directions of the grid plates in the first arc extinguishing portion 110 and the second arc extinguishing portion 120 are perpendicular to each other, and in the second direction, the second arc extinguishing portion 120 overlaps with the projection of the first arc extinguishing portion 110. Without changing the arrangement of internal components of the existing frame-type switch, more grid plates are arranged and arranged, thereby improving the arc extinguishing ability of the arc extinguishing chamber 100, thereby improving the arc extinguishing voltage of the arc extinguishing chamber 100, so that the frame-type switch can be used for switching at higher voltages.
[0032] The lengths of the first grid sheet 111 and the second grid sheet 121 are not limited in the embodiment of the present application and can be specifically set according to the layout of the frame switch. If space permits, the lengths of the grid sheets can be set as large as possible. For example, Figure 2 As shown, the lengths of the plurality of first grid sheets 111 are the same, and the lengths of the plurality of second grid sheets 121 are different.
[0033] In addition, the first arc extinguishing portion 110 and the second arc extinguishing portion 120 are arranged along the rotation direction of the moving contact 210 when the switch is opened. A first arc-starting plate 112 is arranged on one side of the first arc extinguishing portion 110. The first arc-starting plate 112 is used to connect with the static contact 220. The first arc-starting plate 112 extends into the arc-starting space and is recessed toward the second arc extinguishing portion 120 to form a recessed structure 113 to reduce the distance between the first arc-starting plate 112 and the second arc extinguishing portion 120.
[0034] The first arc-starting plate 112 is used to connect with the static contact 220. When the moving contact 210 is separated from the static contact 220, Figure 1 and Figure 2 The moving contact 210 rotates in the direction indicated by the arc A in the figure, and an arc is generated when the moving contact 210 and the static contact 220 are just separated, and the arc is elongated as the moving contact 210 rotates. The first arc extinguishing part 110 and the second arc extinguishing part 120 are arranged along the rotation direction of the moving contact 210 when the gate is opened, so that the arc starting point is close to the overlapping part of the first arc extinguishing part 110 and the second arc extinguishing part 120. There are more grids here, so that the arc extinguishing ability here is stronger. In this way, the generated arc can be extinguished faster, and the arc extinguishing efficiency is improved. Specifically, the first arc-starting plate 112 is arranged on one side of the first arc extinguishing part 110, connected to the static contact 220, and the moving contact 210 rotates from the first arc extinguishing part 110 to the second arc extinguishing part 120.
[0035] It can be understood that, in the second direction, the second arc extinguishing portion 120 overlaps with the projection portion of the first arc extinguishing portion 110, and the first arc-starting plate 112 should be arranged on the side of the first arc extinguishing portion 110 away from the overlapping projection portion, such as Figure 1 and Figure 2 As shown, it is used to connect with the static contact 220 to achieve arc extinguishing.
[0036] In order to enable the generated arc to reach the first grid 111 as quickly as possible, the first arc-starting plate 112 is extended into the arc-starting space in the embodiment of the present application, and a portion of the first arc-starting plate 112 is close to the second arc-extinguishing portion 120 to form a recessed structure 113, so that the distance between the first arc-starting plate 112 and the second arc-extinguishing portion 120 is reduced. Figure 2 As shown, a gradually narrowing channel is formed between the recessed structure 113 and the second arc extinguishing portion 120. The electric arc is a charged high-temperature gas. In the arc striking space, it passes through a wider channel, a narrower channel, and finally reaches the wider first arc extinguishing portion 110. According to the Venturi principle, the flow velocity increases in the narrower channel, and suction is formed at the first arc extinguishing portion 110, so that more electric arc flows to the first arc extinguishing portion 110 to achieve arc extinguishing. The embodiment of the present application accelerates the flow of the electric arc to the first arc extinguishing portion 110 by forming the recessed structure 113, thereby making full use of the first grid 111 of the first arc extinguishing portion 110 to achieve rapid arc extinguishing.
[0037] The present application provides an arc extinguishing chamber, comprising: a first arc extinguishing portion 110 and a second arc extinguishing portion 120 arranged at intervals, the first arc extinguishing portion 110 comprising a plurality of first grid pieces 111 arranged along a first direction, the second arc extinguishing portion 120 comprising a plurality of second grid pieces 121 arranged along a second direction, the first direction being perpendicular to the second direction, the second arc extinguishing portion 120 partially overlapping with a projection of the first arc extinguishing portion 110 in the second direction, the second arc extinguishing portion 120 extending toward a movement direction of a moving contact 210 when the switch is opened, and without changing the arrangement of components inside an existing frame-type switch, a more The first arc extinguishing portion 110 and the second arc extinguishing portion 120 are enclosed by a plurality of grids to form an arc-striking space. A first arc-striking plate is arranged on one side of the first arc extinguishing portion. The first arc-striking plate 112 is used to connect with the static contact 220. When the switch is opened, that is, when the moving contact 210 is separated from the static contact 220, the moving contact 210 rotates along the arrangement direction of the first arc extinguishing portion and the second arc extinguishing portion, so that the arc enters the first arc extinguishing portion 110 and the second arc extinguishing portion 120 from the arc-striking space, so that the first grid 111 and the second grid 121 extinguish the arc. By arranging more grids, the arc extinguishing capacity of the arc extinguishing chamber 100 is improved. In addition, the first arc-starting plate 112 extends into the arc-starting space and is recessed toward the second arc-extinguishing portion 120 to form a recessed structure to reduce the distance between the first arc-starting plate 112 and the second arc-extinguishing portion 120. On the one hand, the arc starting point is close to the overlapping portion of the first arc-extinguishing portion and the second arc-extinguishing portion, where there are more grid plates, so that the arc-extinguishing ability here is stronger; on the other hand, a narrower channel is formed at the recessed portion to accelerate the flow of the arc, so that the generated arc can be extinguished more quickly, thereby improving the arc-extinguishing efficiency. The arc-extinguishing voltage of the arc-extinguishing chamber is increased by improving the arc-extinguishing ability and arc-extinguishing efficiency. Therefore, the embodiment of the present application can solve the problem of insufficient arc-extinguishing ability of the arc-extinguishing chamber in the prior art.
[0038] In one possible implementation of the embodiment of the present application, Figure 3 and Figure 4 As shown, a first magnetizing block 114 is disposed in the recessed structure 113 .
[0039] Those skilled in the art should know that an electric arc is a charged high-temperature gas, and a first magnetizing block 114 is arranged in the recessed structure 113. A magnetic field is formed on the periphery of the first magnetizing block 114. When the electric arc is located in the magnetic field, the arc is charged, and its movement speed is accelerated under the action of the electric field, so that the arc can quickly move into the first arc extinguishing portion 110, and the first arc extinguishing portion 110 extinguishes the arc.
[0040] In addition, the first magnetizing block 114 is disposed in the recessed structure 113 , so that the space in the recessed structure 113 can be fully utilized, and the arc extinguishing chamber 100 is more compact.
[0041] Specifically, the shape of the first magnetizing block 114 is not limited in the embodiment of the present application, and those skilled in the art can set it according to actual conditions. Preferably, the shape of the first magnetizing block 114 matches the shape of the side wall of the recessed structure 113. On the one hand, the space of the recessed structure 113 can be fully utilized, so that the volume of the first magnetizing block 114 is as large as possible, and the magnetic field generated can be stronger; on the other hand, the distance to the arc is relatively close, the force on the arc is greater, and the acceleration effect on the arc movement is more obvious.
[0042] Optional, such as Figure 2 As shown, the side surface of the recessed structure 113 close to the second arc extinguishing portion 120 is an inclined surface, which extends toward the movement direction of the moving contact 210 during opening and is inclined toward the direction close to the static contact 220 .
[0043] The side surface of the recessed structure 113 close to the second arc extinguishing portion 120 is set as an inclined surface and tilted toward the static contact 220, so that the narrower channel is a gradually narrowing channel, which is beneficial to the flow of the arc.
[0044] In one achievable manner of the embodiment of the present application, second magnetizing blocks are respectively disposed at both ends of the second arc extinguishing portion 120 .
[0045] Second magnetizing blocks are respectively provided at both ends of the second arc extinguishing portion 120. The function of the second magnetizing block is the same as that of the first magnetizing block 114, which guides the arc so that the arc enters the second arc extinguishing portion 120 as quickly as possible to be extinguished, thereby improving the arc extinguishing efficiency.
[0046] Optionally, the plurality of second grid sheets 121 are arranged at equal intervals, the plurality of first grid sheets 111 are arranged at equal intervals, and the distance between two adjacent second grid sheets 121 is greater than the distance between two adjacent first grid sheets 111 .
[0047] Optional, such as Figure 2 As shown, in the second direction, the distance between the first arc extinguishing portion 110 and the second arc extinguishing portion 120 is greater than 2d, where d is the distance between two adjacent grid pieces in the second arc extinguishing portion 120 .
[0048] like Figure 2As shown, the distance between the first arc extinguishing portion 110 and the second arc extinguishing portion 120 is D1, that is, D1>2d. Since the projection of the second arc extinguishing portion 120 partially overlaps with the projection of the first arc extinguishing portion 110 in the second direction, when the distance between the first arc extinguishing portion 110 and the second arc extinguishing portion 120 is small, the arc is not easy to move to the part of the first arc extinguishing portion 110 that overlaps with the second arc extinguishing portion 120 in the second direction, thereby reducing the arc extinguishing effect of the first arc extinguishing portion 110. Therefore, in the embodiment of the present application, the distance between the first arc extinguishing portion 110 and the second arc extinguishing portion 120 is set to be greater than 2d, where d is the distance between two adjacent grids in the second arc extinguishing portion 120.
[0049] It is understandable that the distance between the first arc extinguishing portion 110 and the second arc extinguishing portion 120 cannot be too large, as a too large distance will increase the volume of the arc extinguishing chamber 100. For example, the distance between the first arc extinguishing portion 110 and the second arc extinguishing portion 120 may be 3d, 4d or 5d.
[0050] In one possible implementation of the embodiment of the present application, Figure 1 and Figure 2 As shown, the last first grid piece 111 and the second grid piece 121 on the side where the first arc extinguishing portion 110 and the second arc extinguishing portion 120 are close to each other are connected by an inclined connecting plate 130, one end of the connecting plate 130 is connected to the side of the first grid piece 111 close to the second arc extinguishing portion 120, and the other end is connected to the side of the second grid piece 121 close to the static contact 220.
[0051] After the arc enters the first arc extinguishing portion 110 through a narrow channel, the connecting plate 130 guides the arc so that the arc can enter the first grid piece 111 in the first arc extinguishing portion 110 that overlaps with the second arc extinguishing portion 120, thereby making full use of all the first grid pieces 111 in the first arc extinguishing portion 110 to extinguish the arc, thereby improving the arc extinguishing efficiency.
[0052] It can be understood that the projections of the first arc extinguishing portion 110 and the second arc extinguishing portion 120 in the second direction partially overlap, and the connecting plate 130 needs to connect the side of the last first grid piece 111 of the first arc extinguishing portion 110 close to the second arc extinguishing portion 120, and the side of the last second grid piece 121 of the second arc extinguishing portion 120 close to the arc striking space, such as Figure 1 and Figure 2 As shown, in order to achieve the guiding effect on the arc.
[0053] Optional, such as Figure 1 and Figure 2 As shown, the included angle between the connecting plate 130 and the second grid plate 121 is between 5° and 45°.
[0054] Among them, the larger the angle between the connecting plate 130 and the second grid 121, the larger the distance between the first arc extinguishing portion 110 and the second arc extinguishing portion 120, and the larger the volume of the arc extinguishing chamber 100; the smaller the angle between the connecting plate 130 and the second grid 121, the weaker the arc guiding ability. Based on the above two considerations, the embodiment of the present application sets the angle between the connecting plate 130 and the second grid 121 to between 5°-45°, and for example, it can be 20°, 30°, 40°, etc.
[0055] In one possible implementation of the embodiment of the present application, Figure 1 and Figure 2 As shown, a second arc-starting plate 123 is provided on a side of the second arc-extinguishing portion 120 away from the first arc-extinguishing portion 110 . The second arc-starting plate 123 is bent toward the first arc-extinguishing portion 110 to form an arc-starting opening with the side wall of the recessed structure 113 .
[0056] The arc generated when the moving contact 210 and the stationary contact 220 are separated enters the arc striking space through the arc striking opening, and then enters the first arc extinguishing portion 110 and the second arc extinguishing portion 120 for arc extinguishing.
[0057] The present application also discloses a frame switch. Figure 5 As shown, it includes a housing, a contact assembly arranged in the housing, and the above-mentioned arc extinguishing chamber 100, the contact assembly includes a static contact 220 and a moving contact 210 driven to move in contact with or separate from the static contact 220, and the arc extinguishing chamber 100 is arranged on the path of the moving contact 210 when the switch is opened. The frame-type switch includes the same structure and beneficial effects as the arc extinguishing chamber 100 in the aforementioned embodiment. The structure and beneficial effects of the arc extinguishing chamber 100 have been described in detail in the aforementioned embodiment, and will not be repeated here.
[0058] The specific form of the frame-type switch is not limited in the embodiment of the present application, as long as it is a frame-type device that can disconnect the circuit. For example, it can be a frame-type circuit breaker or a frame-type isolating switch.
[0059] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. An arc extinguishing chamber, comprising: A first arc extinguishing portion (110) and a second arc extinguishing portion (120) are arranged at intervals, wherein the first arc extinguishing portion (110) comprises a plurality of first grid pieces (111) arranged along a first direction, and the second arc extinguishing portion (120) comprises a plurality of second grid pieces (121) arranged along a second direction, the second arc extinguishing portion (120) partially overlaps with a projection of the first arc extinguishing portion (110) in the second direction, the second arc extinguishing portion (120) extends toward a movement direction of a moving contact (210) when the switch is opened, and the first arc extinguishing portion (110) The first arc-striking portion (112) and the second arc-extinguishing portion (120) form an arc-striking space, and the first direction is perpendicular to the second direction; it is characterized in that a first arc-striking plate (112) is arranged on one side of the first arc-extinguishing portion (110), and the first arc-striking plate (112) is used to connect with the static contact (220), and the first arc-striking plate (112) extends into the arc-striking space and is recessed toward the second arc-extinguishing portion (120) to form a recessed structure (113) to reduce the distance between the first arc-striking plate (112) and the second arc-extinguishing portion (120).
2. The arc extinguishing chamber according to claim 1, characterized in that: A first magnetizing block (114) is arranged in the recessed structure (113).
3. The arc extinguishing chamber according to claim 1, characterized in that: The side surface of the recessed structure (113) close to the second arc extinguishing portion (120) is an inclined surface, which extends in the direction of movement of the moving contact (210) when the switch is opened, and is inclined in a direction close to the stationary contact (220).
4. The arc extinguishing chamber according to claim 1, characterized in that: Second magnetization blocks are respectively arranged at two ends of the second arc extinguishing portion (120).
5. The arc extinguishing chamber according to claim 1, characterized in that: In the second direction, the distance between the first arc extinguishing portion (110) and the second arc extinguishing portion (120) is greater than 2d, wherein d is the distance between two adjacent grid pieces in the second arc extinguishing portion (120).
6. The arc extinguishing chamber according to claim 1, characterized in that: The plurality of second grid sheets (121) are arranged at equal intervals, the plurality of first grid sheets (111) are arranged at equal intervals, and the distance between two adjacent second grid sheets (121) is greater than the distance between two adjacent first grid sheets (111).
7. The arc extinguishing chamber according to claim 5, characterized in that: The last first grid piece (111) and the second grid piece (121) on the side where the first arc extinguishing portion (110) and the second arc extinguishing portion (120) are close to each other are connected via an inclined connecting plate (130); one end of the connecting plate (130) is connected to the side of the first grid piece (111) close to the second arc extinguishing portion (120), and the other end is connected to the side of the second grid piece (121) close to the static contact (220).
8. The arc extinguishing chamber according to claim 7, characterized in that: The angle between the connecting plate (130) and the second grid plate (121) is between 5° and 45°.
9. The arc extinguishing chamber according to claim 1, characterized in that: A second arc-starting plate (123) is arranged on a side of the second arc-extinguishing portion (120) away from the first arc-extinguishing portion (110), and the second arc-starting plate (123) is bent toward the first arc-extinguishing portion (110) to form an arc-starting opening with the side wall of the recessed structure (113).
10. A frame switch, characterized in that: The invention comprises a shell, a contact assembly arranged in the shell, and an arc extinguishing chamber (100) as claimed in any one of claims 1 to 9, wherein the contact assembly comprises a stationary contact (220) and a moving contact (210) driven to move to contact or separate from the stationary contact (220), and the arc extinguishing chamber (100) is arranged on the path of the moving contact (210) when the circuit breaker is opened.