Arc extinguishing structure and switch unit group
By providing the first and second permanent magnets on the moving contact bracket, the problem of high cost and insufficient breaking performance in the prior art is solved, and a low-cost and efficient arc guidance and breaking effect is achieved.
Patent Information
- Application Number
- CN202422041265.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-08-21
AI Technical Summary
The prior art provides a plurality of permanent magnets in the isolating switch to guide the arc into the arc extinguishing area, which is costly and cannot effectively improve the breaking performance of the dynamic and static contacts.
The first and second permanent magnets are arranged on the moving contact bracket, which are located on both sides of the moving contact, and the magnetic field guides the arc into the arc extinguishing area, and blows the arc through the moving magnetic field to reduce the number of permanent magnets to reduce costs.
It effectively improves the breaking performance of dynamic and static contacts, reduces the overall cost, and continuously guides the arc through the moving magnetic field to avoid the arc burning between the contacts.
Smart Images
Figure CN223218187U_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 structure and a switch unit group. Background Art
[0002] As an essential electrical component in control circuits, disconnectors play a controlling and protective role in power systems and are widely used in many production processes and technical equipment. During the disconnection process, an arc is generated between the movable and stationary contacts of an disconnector. If this arc burns between the movable and stationary contacts for a long time without being drawn into the arc-extinguishing zone, it can cause disconnection failure and extensive burn damage to the movable and stationary contacts, shortening the overall electrical life of the disconnector.
[0003] To quickly direct the arc generated by the breaking process into the arc extinguishing zone, the conventional approach is to install multiple permanent magnets distributed sequentially between the static contact and the arc extinguishing zone to guide the arc into the arc extinguishing zone. However, this solution is costly and does not effectively improve the breaking performance of the moving and static contacts. Utility Model Content
[0004] The purpose of this application is to address the deficiencies in the above-mentioned prior art and provide an arc extinguishing structure and a switch unit group, which are low in cost and can effectively improve the breaking performance of the moving and static contacts.
[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of the present application are as follows:
[0006] According to one aspect of an embodiment of the present application, an arc extinguishing structure is provided, comprising: a moving contact bracket, a moving contact arranged on the moving contact bracket, a first permanent magnet and a second permanent magnet, wherein the first permanent magnet and the second permanent magnet are respectively located on opposite sides of the moving contact in a first direction, the first direction is perpendicular to the closing direction and the contact area of the moving contact, the contact area is used to contact with the static contact to achieve closing, one pole of the first permanent magnet is close to the moving contact, and the other pole is away from the moving contact, and one pole of the second permanent magnet is close to the moving contact, and the other pole is away from the moving contact.
[0007] Optionally, the orthographic projections of the first permanent magnet and the second permanent magnet on the moving contact bracket along the second direction are respectively located on a side of the orthographic projection of the moving contact on the moving contact bracket along the second direction close to the static contact, wherein the second direction is perpendicular to the closing direction and the first direction.
[0008] Optionally, the moving contact bracket includes a bracket body, a first arm and a second arm arranged on the bracket body, the moving contact is located on the bracket body, the first arm and the second arm are respectively located on two opposite sides of the moving contact in a first direction, the first permanent magnet is arranged on the side of the first arm away from the moving contact, and the second permanent magnet is arranged on the side of the second arm away from the moving contact.
[0009] Optionally, the moving contact includes a first sub-contact and a second sub-contact, the first sub-contact and the second sub-contact are spaced apart along the first direction, the contact area of the first sub-contact and the contact area of the second sub-contact are close to each other, and the first sub-contact and the second sub-contact are respectively used to cooperate with the static contact on two sides opposite to each other in the first direction.
[0010] Optionally, the arc extinguishing structure also includes an arc extinguishing chamber, which is arranged on the side of the static contact facing the moving contact and on the side of the opening path of the moving contact. The arc extinguishing chamber includes two arc-isolating plates arranged opposite to each other, and a plurality of grids fixed between the two arc-isolating plates, and the plurality of grids are sequentially away from the static contact.
[0011] Optionally, a first arc striking angle is provided on the grid closest to the static contact, and a second arc striking angle is provided on the grid farthest from the static contact. The first arc striking angle and the second arc striking angle respectively correspond to the position of the static contact, and the first arc striking angle and the second arc striking angle respectively extend from the grid to the static contact.
[0012] Optionally, the moving areas of the first permanent magnet and the second permanent magnet cover areas where the first arc ignition angle and the second arc ignition angle are located.
[0013] Optionally, the arc extinguishing chamber is divided into a first arc extinguishing area and a second arc extinguishing area. The first arc extinguishing area is located on the side of the static contact facing the moving contact and is parallel to the opening path. The second arc extinguishing area is connected to the side of the first arc extinguishing area away from the static contact and extends toward the moving contact bracket.
[0014] Another aspect of an embodiment of the present application provides a switch unit group, including a switch unit, the switch unit including a shell, a static contact arranged in the shell and an arc extinguishing structure as described above, the moving contact of the arc extinguishing structure is used to cooperate with the static contact.
[0015] Optionally, the switch unit includes at least two layers, the at least two layers of switch units are stacked along the first direction, and the magnetic poles of all first permanent magnets and second permanent magnets spaced apart along the first direction in the at least two layers of switch units are arranged in the same direction.
[0016] The beneficial effects of this application include:
[0017] The present application provides an arc extinguishing structure, comprising: a moving contact support, a moving contact mounted on the moving contact support, a first permanent magnet, and a second permanent magnet. The first permanent magnet and the second permanent magnet are located on opposite sides of the moving contact in a first direction, the first direction being perpendicular to the closing direction and the contact area of the moving contact, the contact area being used to contact the static contact to achieve closing. One pole of the first permanent magnet is positioned proximate to the moving contact, while the other pole is positioned away from the moving contact. The second permanent magnet has one pole proximate to the moving contact, while the other pole is positioned away from the moving contact. The arc extinguishing structure positions the first and second permanent magnets on the moving contact support so that they can move with the moving contact support. The magnetic fields generated by the first and second permanent magnets can continuously guide the arc, significantly increasing the electromagnetic force, raising the arc voltage, and making it easier for the arc to leave the static contact. Furthermore, the magnetic field can disperse the arc, causing it to cool and lengthen, thereby effectively improving the breaking performance of the moving and static contacts. In addition, since the first permanent magnet and the second permanent magnet are movable, there is no need to arrange multiple magnets between the static contact and the arc extinguishing area, and the overall cost is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] 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 embodiments. 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 relevant drawings can be obtained based on these drawings without creative work.
[0019] Figure 1 A schematic diagram of the arc extinguishing structure provided in an embodiment of the present application;
[0020] Figure 2 This is one of the partial structural diagrams of the arc extinguishing structure provided in the embodiment of the present application;
[0021] Figure 3 The second schematic diagram of the partial structure of the arc extinguishing structure provided in the embodiment of the present application;
[0022] Figure 4 The third schematic diagram of the partial structure of the arc extinguishing structure provided in the embodiment of the present application;
[0023] Figure 5 One of the schematic diagrams of the magnetic pole arrangement of the first permanent magnet and the second permanent magnet provided in an embodiment of the present application;
[0024] Figure 6 The second schematic diagram of the magnetic pole arrangement of the first permanent magnet and the second permanent magnet provided in the embodiment of the present application;
[0025] Figure 7 The third schematic diagram of the magnetic pole arrangement of the first permanent magnet and the second permanent magnet provided in the embodiment of the present application;
[0026] Figure 8 One of the structural schematic diagrams of the static contact and arc extinguishing chamber provided in the embodiment of the present application;
[0027] Figure 9 The second structural diagram of the static contact and arc extinguishing chamber provided in the embodiment of the present application;
[0028] Figure 10 This is one of the structural diagrams of the switch unit group provided in an embodiment of the present application;
[0029] Figure 11 This is the second structural diagram of the switch unit group provided in an embodiment of the present application.
[0030] Icons: 10-switch unit group; 20-switch unit; 100-arc extinguishing structure; 110-first permanent magnet; 120-second permanent magnet; 130-arc extinguishing chamber; 131-arc isolation plate; 132-grid; 1321-first arc striking angle; 1322-second arc striking angle; 133-first arc extinguishing area; 134-second arc extinguishing area; 210-moving contact bracket; 211-bracket body; 212-first arm; 213-second arm; 214-first accommodating groove; 215-second accommodating groove; 216-first clamping groove; 217-second clamping groove; 220-moving contact; 221-first sub-contact; 222-second sub-contact; 231-first clamping hoop; 232-second clamping hoop; 300-static contact; 400-housing; F1-first direction; F2-closing direction; F3-second direction. DETAILED DESCRIPTION
[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.
[0032] 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 as claimed, but merely represents selected embodiments of the present application. It should be noted that, unless there is a conflict, the various features of the embodiments of the present application may be combined with each other, and the combined embodiments are still within the scope of protection of the present application.
[0033] 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, it does not need to be further defined or explained in subsequent drawings.
[0034] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0035] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.
[0036] During the disconnection process, an arc is generated between the movable and stationary contacts of an isolating switch. If the arc burns between the movable and stationary contacts for a long time without being drawn into the arc-extinguishing zone, it can cause disconnection failure and extensive surface burn damage to the movable and stationary contacts, affecting the overall electrical life of the isolating switch. To quickly direct the arc generated by the disconnection into the arc-extinguishing zone, the conventional method is to install multiple permanent magnets distributed sequentially between the stationary contact and the arc-extinguishing zone to guide the arc into the arc-extinguishing zone. However, the installation of multiple permanent magnets is costly and does not effectively improve the disconnection performance of the movable and stationary contacts.
[0037] In order to solve the above technical problems, one aspect of the embodiment of the present application is to refer to Figure 1 , provides an arc extinguishing structure 100, which can introduce the arc generated by the moving contact 220 and the static contact 300 during the disconnection process into the arc extinguishing area, has low cost and can effectively improve the breaking performance of the moving and static contacts.
[0038] Specifically, please refer to Figure 2 and Figure 3The arc extinguishing structure 100 includes: a moving contact bracket 210, a moving contact 220 arranged on the moving contact bracket 210, a first permanent magnet 110 and a second permanent magnet 120, the first permanent magnet 110 and the second permanent magnet 120 are respectively located on opposite sides of the moving contact 220 in a first direction F1, the first direction F1 is perpendicular to the closing direction F2 and the contact area of the moving contact 220, the contact area is used to contact with the static contact 300 to achieve closing, one pole of the first permanent magnet 110 is close to the moving contact 220, and the other pole is away from the moving contact 220, and one pole of the second permanent magnet 120 is close to the moving contact 220, and the other pole is away from the moving contact 220.
[0039] The moving contact bracket 210 is arranged in the shell and can reciprocate along a preset path relative to the shell. The moving contact 220, the first permanent magnet 110 and the second permanent magnet 120 are arranged on the moving contact bracket 210 and can move with the moving contact bracket 210. A contact area is provided on the moving contact 220, which is used to contact the contact area on the static contact 300 to achieve closing. The contact area can be a line or a surface, etc. The first permanent magnet 110 and the second permanent magnet 120 are respectively located on two opposite sides of the moving contact 220 in a first direction F1, and the first direction F1 is perpendicular to the closing direction F2 and perpendicular to the contact area on the moving contact 220. Preferably, please refer to Figure 4 The first permanent magnet 110 and the second permanent magnet 120 are disposed opposite each other in the first direction F1. In other embodiments, the first permanent magnet 110 and the second permanent magnet 120 may be disposed opposite each other in only a portion of the first direction F1.
[0040] It should be noted that the first permanent magnet 110 and the second permanent magnet 120 are respectively located on two opposite sides of the moving contact 220 in the first direction F1, which does not mean that the first permanent magnet 110 and the second permanent magnet 120 must be arranged directly opposite the moving contact 220 in the first direction F1. The first permanent magnet 110 and the second permanent magnet 120 can be located on the oblique side of the moving contact 220. Figure 4 The first permanent magnet 110 and the second permanent magnet 120 shown in FIG. 1 are located on the oblique side surfaces of the moving contact 220 .
[0041] The first permanent magnet 110 and the second permanent magnet 120 both have north and south poles. One of the north and south poles of the first permanent magnet 110 is positioned closer to the moving contact 220, while the other is positioned away from the moving contact 220. Similarly, one of the north and south poles of the second permanent magnet 120 is positioned closer to the moving contact 220, while the other is positioned away from the moving contact 220. The first and second permanent magnets 110 and 120 form a magnetic field on the moving contact support 210, with the moving contact 220 positioned within this magnetic field. When the moving contact 220 and the stationary contact 300 disconnect, the arc generated within the contact area between the moving contact 220 and the stationary contact 300 is also positioned within this magnetic field. As the moving contact support 210 moves, the magnetic field guides the arc away from the stationary contact 300 and disperses it, cooling and lengthening it, thereby preventing it from continuously burning between the moving contact 220 and the stationary contact 300.
[0042] Preferably, the number of the first permanent magnet 110 and the number of the second permanent magnet 120 are both one, which can significantly reduce the cost.
[0043] The arc extinguishing structure 100 described above arranges the first permanent magnet 110 and the second permanent magnet 120 on the moving contact bracket 210 so that they can move with the moving contact bracket 210. The magnetic field generated by the first permanent magnet 110 and the second permanent magnet 120 can continuously guide the movement of the arc, greatly increasing the electromagnetic force, raising the arc voltage, and making it easier for the arc to leave the static contact 300. At the same time, the magnetic field can also blow away the arc, causing the arc to cool and lengthen, thereby effectively improving the breaking performance of the moving and static contacts. In addition, because the first permanent magnet 110 and the second permanent magnet 120 are movable, there is no need to arrange multiple magnets between the static contact 300 and the arc extinguishing area, significantly reducing overall costs.
[0044] Alternatively, see Figure 5 and Figure 6 , the N pole of the first permanent magnet 110 and the S pole of the second permanent magnet 120 are close to each other, or the S pole of the first permanent magnet 110 and the N pole of the second permanent magnet 120 are close to each other.
[0045] That is, the north pole of the first permanent magnet 110 and the south pole of the second permanent magnet 120 are respectively oriented toward the moving contact 220, while the south pole of the first permanent magnet 110 and the north pole of the second permanent magnet 120 are respectively oriented away from the moving contact 220. Alternatively, the south pole of the first permanent magnet 110 and the north pole of the second permanent magnet 120 are respectively oriented toward the moving contact 220, while the north pole of the first permanent magnet 110 and the south pole of the second permanent magnet 120 are respectively oriented away from the moving contact 220. This configuration forms a uniform magnetic field between the first permanent magnet 110 and the second permanent magnet 120, thereby better guiding the arc to follow the movement of the moving contact bracket 210.
[0046] Alternatively, see Figure 7, the N pole of the first permanent magnet 110 and the N pole of the second permanent magnet 120 are close to each other, or the S pole of the first permanent magnet 110 and the S pole of the second permanent magnet 120 are close to each other.
[0047] That is, the north pole of the first permanent magnet 110 and the north pole of the second permanent magnet 120 are respectively oriented toward the movable contact 220, while the south pole of the first permanent magnet 110 and the south pole of the second permanent magnet 120 are respectively oriented away from the movable contact 220. Alternatively, the south pole of the first permanent magnet 110 and the south pole of the second permanent magnet 120 are respectively oriented toward the movable contact 220, while the north pole of the first permanent magnet 110 and the north pole of the second permanent magnet 120 are respectively oriented away from the movable contact 220. This configuration can also form a magnetic field between the first permanent magnet 110 and the second permanent magnet 120. Although this magnetic field is non-uniform, it can still guide the arc to follow the movement of the movable contact bracket 210.
[0048] Alternatively, see Figure 1 and Figure 4 The orthographic projections of the first permanent magnet 110 and the second permanent magnet 120 on the moving contact bracket 210 along the second direction F3 are respectively located on the side of the orthographic projection of the moving contact 220 on the moving contact bracket 210 along the second direction F3 close to the static contact 300, wherein the second direction F3 is perpendicular to the closing direction F2 and the first direction F1.
[0049] The first permanent magnet 110 forms an orthographic projection L1 on the moving contact support 210 along the second direction F3. The second permanent magnet 120 forms an orthographic projection L2 on the moving contact support 210 along the second direction F3. The moving contact 220 forms an orthographic projection L3 on the moving contact support 210 along the second direction F3. L1 is located on the side of L3 closer to the stationary contact 300, and L2 is also located on the side of L3 closer to the stationary contact 300. The first permanent magnet 110 and the second permanent magnet 120 are located on the oblique side of the moving contact 220 and closer to the stationary contact 300.
[0050] Alternatively, see Figure 2 and Figure 3 The movable contact support 210 includes a support body 211, a first arm 212, and a second arm 213 disposed on the support body 211. The movable contact 220 is located on the support body 211. The first arm 212 and the second arm 213 are respectively located on opposite sides of the movable contact 220 in the first direction F1. The first permanent magnet 110 is disposed on a side of the first arm 212 facing away from the movable contact 220, and the second permanent magnet 120 is disposed on a side of the second arm 213 facing away from the movable contact 220. The first permanent magnet 110 and the second permanent magnet 120 are disposed away from the arc to prevent the first permanent magnet 110 and the second permanent magnet 120 from being demagnetized by high temperature.
[0051] Alternatively, see Figure 1 and Figure 5The first arm 212 is provided with a first receiving groove 214, and the second arm 213 is provided with a second receiving groove 215. The first permanent magnet 110 is located in the first receiving groove 214, and the second permanent magnet 120 is located in the second receiving groove 215. A first clamp 231 is sleeved on the first arm 212, and a second clamp 232 is sleeved on the second arm 213. The first clamp 231 surrounds the first receiving groove 214 to confine the first permanent magnet 110 in the first receiving groove 214, and the second clamp 232 surrounds the second receiving groove 215 to confine the second permanent magnet 120 in the second receiving groove 215.
[0052] For example, a first clamping groove 216 and a second clamping groove 217 are respectively provided at the notches of the first accommodating groove 214 and the second accommodating groove 215. The first clamping hoop 231 is partially located in the first clamping groove 216, and the second clamping hoop 232 is partially located in the second clamping groove 217. The first clamping groove 216 and the second clamping groove 217 are respectively used to limit the first clamping hoop 231 and the second clamping hoop 232 to prevent them from falling.
[0053] Optionally, please refer to Figure 4 The moving contact 220 includes a first sub-contact 221 and a second sub-contact 222. The first sub-contact 221 and the second sub-contact 222 are spaced apart along the first direction F1. The contact area of the first sub-contact 221 and the contact area of the second sub-contact 222 are close to each other. The first sub-contact 221 and the second sub-contact 222 are respectively used to cooperate with the static contact 300 on two sides opposite to each other in the first direction F1.
[0054] The first sub-contact 221 and the second sub-contact 222 simultaneously contact the static contact 300 to close the circuit breaker, thereby improving the reliability of the closing operation. It is understood that one of the first permanent magnet 110 and the second permanent magnet 120 is located on the side of the first sub-contact 221 facing away from the second sub-contact 222, and the other is located on the side of the second sub-contact 222 facing away from the first sub-contact 221.
[0055] Alternatively, see Figure 1 and Figure 8 The arc-extinguishing structure 100 further includes an arc-extinguishing chamber 130, which is disposed on the side of the static contact 300 facing the movable contact 220 and on the side of the opening path of the movable contact 220. When the movable contact 220 and the static contact 300 are opened, the movable contact 220 just passes by the side of the arc-extinguishing chamber 130, and the arc enters the arc-extinguishing chamber 130. The arc-extinguishing chamber 130 includes two arc-isolating plates 131 arranged opposite each other, and a plurality of grids 132 fixed between the two arc-isolating plates 131. The plurality of grids 132 are sequentially spaced away from the static contact 300. After the arc enters the arc-extinguishing chamber 130, it is cut by the grids 132 and rapidly cooled and extinguished.
[0056] Preferably, the plurality of grid plates 132 are parallel to each other and evenly distributed between the two arc isolation plates 131 .
[0057] Alternatively, see Figure 1 and Figure 9 The arc extinguishing chamber 130 is divided into a first arc extinguishing area 133 and a second arc extinguishing area 134. The first arc extinguishing area 133 is located on the side of the static contact 300 facing the moving contact 220 and is parallel to the opening path. The second arc extinguishing area 134 is connected to the side of the first arc extinguishing area 133 away from the static contact 300 and extends toward the moving contact bracket 210.
[0058] The first arc-extinguishing region 133 extends along the side of the opening path, and its extension direction is consistent with the movement direction of the movable contact 220 during opening, thereby achieving a better arc-extinguishing effect. The second arc-extinguishing region 134 extends from the first arc-extinguishing region 133 toward the movable contact support 210 at the end of the opening path, forming a tendency to wrap around the side of the movable contact 220 away from the static contact 300, thereby preventing the arc from escaping from the side of the movable contact 220 away from the static contact 300.
[0059] Optionally, please refer to Figure 8 A first arc striking angle 1321 is provided on the grid piece 132 closest to the static contact 300 . The first arc striking angle 1321 corresponds to the position of the static contact 300 and extends from the grid piece 132 to the static contact 300 .
[0060] The first arc striking angle 1321 is at the same height as the static contact 300 and extends toward the static contact 300 to be close to the static contact 300 . The first arc striking angle 1321 is electrically conductive, thereby attracting an arc and guiding the arc into the arc extinguishing chamber 130 .
[0061] Optionally, please refer to Figure 1 The moving area of the first permanent magnet 110 and the second permanent magnet 120 covers the area where the first arc striking angle 1321 is located.
[0062] from Figure 1 From the perspective of FIG, the first permanent magnet 110 and the second permanent magnet 120 pass through the first arc striking angle 1321 when they move. Under the joint guidance of the first permanent magnet 110, the second permanent magnet 120 and the first arc striking angle 1321, the arc is more likely to enter the arc extinguishing chamber 130.
[0063] Optionally, a second arc striking angle 1322 is provided on the grid piece 132 farthest from the static contact 300 . The second arc striking angle 1322 corresponds to the position of the static contact 300 and extends from the grid piece 132 to the static contact 300 .
[0064] The second arc-starting angle 1322 is located at the same height as the static contact 300 and extends toward the static contact 300, thereby facilitating arcing. The second arc-starting angle 1322, in conjunction with the first arc-starting angle 1321, improves the utilization of the grid segments 132, allowing more grid segments 132 to participate in arc cutting and quickly extinguish the arc.
[0065] Optionally, the moving area of the first permanent magnet 110 and the second permanent magnet 120 covers the area where the second arc striking angle 1322 is located.
[0066] from Figure 1 From the perspective of FIG, the first permanent magnet 110 and the second permanent magnet 120 pass through the first arc ignition angle 1321 and then the second arc ignition angle 1322. Under the joint guidance of the first permanent magnet 110, the second permanent magnet 120, and the second arc ignition angle 1322, the arc passes through all the grids 132, thereby improving the utilization rate of the grids 132 in the arc extinguishing chamber 130.
[0067] Please refer to Figure 10 and Figure 11 This embodiment further provides a switch unit assembly 10 for use in a disconnector, particularly a transverse disconnector. The switch unit assembly 10 includes a switch unit 20, which includes a housing 400, a static contact 300 disposed within the housing 400, and an arc extinguishing structure 100 as described above. The movable contact 220 of the arc extinguishing structure 100 is configured to cooperate with the static contact 300.
[0068] For example, a portion of the moving contact bracket 210 is exposed from the housing 400 so that a user can manipulate the moving contact bracket 210 to achieve opening and closing of the switch.
[0069] The switch unit group 10 has the same structure and benefits as the arc extinguishing structure 100 in the aforementioned embodiment. The structure and benefits of the arc extinguishing structure 100 have been described in detail in the aforementioned embodiment and will not be repeated here.
[0070] Optionally, please refer to Figure 5 The switch unit 20 includes at least two layers, and the at least two layers of switch units 20 are stacked along the first direction F1. The magnetic poles of all first permanent magnets 110 and second permanent magnets 120 spaced apart along the first direction F1 in the at least two layers of switch units 20 are arranged in the same direction.
[0071] It should be noted that the magnetic pole placement direction refers to the direction in which the N pole of the permanent magnet points to the S pole. After at least two layers of switch units 20 are stacked along the first direction F1, the first permanent magnets 110 and the second permanent magnets 120 in the at least two layers of switch units 20 are also arranged at intervals along the first direction F1. In the first direction F1, all first permanent magnets 110 and all second permanent magnets 120 in the same column are either all N poles facing up and S poles facing down, or all S poles facing up and N poles facing down. Figure 5 As shown, Figure 5 All the first permanent magnets 110 and all the second permanent magnets 120 in the left middle column have their S poles facing upward and their N poles facing downward, and their magnetic poles are arranged in the same direction. Figure 5 All first permanent magnets 110 and all second permanent magnets 120 in the right-side row have their north poles facing upward and their south poles facing downward, with the poles arranged in the same direction. This arrangement is equivalent to connecting the permanent magnets in the same row in series. The magnetic field formed in one layer of switch units 20 can strengthen the magnetic field formed in the adjacent layer of switch units 20. The disconnection of the movable contacts 220 and stationary contacts 300 in one layer of switch units 20 can utilize the magnetic field of the adjacent layer of switch units 20, further improving the disconnection performance of the movable contacts 220 and stationary contacts 300.
[0072] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.
Claims
1. An arc extinguishing structure, characterized in that: include: A moving contact bracket (210), a moving contact (220) arranged on the moving contact bracket (210), a first permanent magnet (110) and a second permanent magnet (120), wherein the first permanent magnet (110) and the second permanent magnet (120) are respectively located on opposite sides of the moving contact (220) in a first direction (F1), the first direction (F1) being perpendicular to a closing direction (F2) and a contact area of the moving contact (220), the contact area being used to contact with a static contact (300) to achieve closing, one pole of the first permanent magnet (110) being close to the moving contact (220) and the other pole being away from the moving contact (220), and one pole of the second permanent magnet (120) being close to the moving contact (220) and the other pole being away from the moving contact (220).
2. The arc extinguishing structure according to claim 1, characterized in that: The orthographic projections of the first permanent magnet (110) and the second permanent magnet (120) along the second direction (F3) on the moving contact bracket (210) are respectively located on a side of the orthographic projection of the moving contact (220) along the second direction (F3) on the moving contact bracket (210) close to the static contact (300), wherein the second direction (F3) is perpendicular to the closing direction (F2) and the first direction (F1).
3. The arc extinguishing structure according to claim 1, characterized in that: The moving contact support (210) comprises a support body (211), a first support arm (212) and a second support arm (213) arranged on the support body (211); the moving contact (220) is located on the support body (211); the first support arm (212) and the second support arm (213) are respectively located on two opposite sides of the moving contact (220) in the first direction (F1); the first permanent magnet (110) is arranged on a side of the first support arm (212) facing away from the moving contact (220); and the second permanent magnet (120) is arranged on a side of the second support arm (213) facing away from the moving contact (220).
4. The arc extinguishing structure according to claim 1, characterized in that: The movable contact (220) includes a first sub-contact (221) and a second sub-contact (222), the first sub-contact (221) and the second sub-contact (222) are spaced apart along the first direction (F1), the contact area of the first sub-contact (221) and the contact area of the second sub-contact (222) are close to each other, and the first sub-contact (221) and the second sub-contact (222) are respectively used to cooperate with the static contact (300) on two sides opposite to each other in the first direction (F1).
5. The arc extinguishing structure according to claim 1, characterized in that: The arc extinguishing structure (100) further includes an arc extinguishing chamber (130), which is arranged on the side of the static contact (300) facing the moving contact (220) and on the side of the opening path of the moving contact (220), and the arc extinguishing chamber (130) includes two arc isolation plates (131) arranged opposite to each other, and a plurality of grid plates (132) fixed between the two arc isolation plates (131), and the plurality of grid plates (132) are sequentially away from the static contact (300).
6. The arc extinguishing structure according to claim 5, characterized in that: A first arc striking angle (1321) is provided on the grid piece (132) closest to the static contact (300), and a second arc striking angle (1322) is provided on the grid piece (132) farthest from the static contact (300), the first arc striking angle (1321) and the second arc striking angle (1322) respectively corresponding to the position of the static contact (300), and the first arc striking angle (1321) and the second arc striking angle (1322) respectively extend from the grid piece (132) to the static contact (300).
7. The arc extinguishing structure according to claim 6, characterized in that: The moving areas of the first permanent magnet (110) and the second permanent magnet (120) cover the areas where the first arc striking angle (1321) and the second arc striking angle (1322) are located.
8. The arc extinguishing structure according to claim 6, characterized in that: The arc extinguishing chamber (130) is divided into a first arc extinguishing area (133) and a second arc extinguishing area (134), wherein the first arc extinguishing area (133) is located on a side of the static contact (300) facing the moving contact (220) and is parallel to the opening path, and the second arc extinguishing area (134) is connected to a side of the first arc extinguishing area (133) away from the static contact (300) and extends toward the moving contact bracket (210).
9. A switch unit group, characterized in that: The invention comprises a switch unit (20), wherein the switch unit (20) comprises a housing (400), a static contact (300) arranged in the housing (400), and an arc extinguishing structure according to any one of claims 1 to 8, wherein the movable contact (220) of the arc extinguishing structure is used to cooperate with the static contact (300).
10. The switch unit group according to claim 9, characterized in that: The switch unit (20) comprises at least two layers, the at least two layers of switch units (20) are stacked along a first direction (F1), and the magnetic poles of all first permanent magnets (110) and second permanent magnets (120) spaced apart along the first direction (F1) in the at least two layers of switch units (20) are arranged in the same direction.