Arc extinguishing device and electrical switch

Abstract

The utility model relates to an arc extinguishing device and an electrical switch. The arc extinguishing device comprises a grid plate, a transfer channel and a magnetism increasing piece, the transfer channel is communicated with the grid plate and is used for moving the arc towards the grid plate for the contact point; the grid sheets form at least two grid sheet groups, and an arc striking channel is arranged between the grid sheet groups and is used for enabling an arc to move between the grid sheet groups; the magnetism increasing piece is arranged on the transfer channel and the arc striking channel and used for forming a magnetic field on the transfer channel and the arc striking channel so as to increase the moving speed of the arc. Compared with the prior art, the magnetic field is formed on the transfer channel and the arc striking channel through the magnetism increasing piece, acting force is applied to the electric arc so as to increase the transfer speed of the electric arc, and the electric arc is accelerated to approach the first grid piece group for arc extinguishing after entering the shell; and part of the unextinguished electric arc continues to be accelerated to approach the second grid plate group for arc extinguishing under the action of the magnetism increasing piece, so that the electric arc is completely extinguished.

Description

Technical Field

[0001] This utility model relates to the field of electrical components technology, and in particular to an arc extinguishing device and an electrical switch. Background Technology

[0002] In photovoltaic and energy storage power generation systems and AC / DC power distribution systems, with the continuous advancement of power grid technology, system capacity is increasing, system voltage is constantly rising, and the requirements for short-circuit fault current breaking capacity are also constantly increasing.

[0003] To improve the single-pole breaking performance of products, especially high-voltage DC system products, arc-extinguishing units are usually installed at the device. This method has a significant improvement in the breaking performance of short-circuit current.

[0004] According to related technologies and overall, due to the certain distance between the contacts and the arc-extinguishing unit, the arc moves slowly towards the arc-extinguishing unit, which can easily lead to arc stagnation and greatly reduce product safety.

[0005] Therefore, it is necessary to develop a new type of arc-extinguishing device and electrical switch to improve some of the problems existing in the related technologies. Utility Model Content

[0006] The purpose of this invention is to provide an arc-extinguishing device and an electrical switch that can accelerate the transfer speed of the electric arc and improve product safety.

[0007] The objective of this utility model can be achieved through the following technical solutions:

[0008] This utility model provides an arc extinguishing device, which includes: a grid plate, a transfer channel, and a magnetizing component; the transfer channel is connected to the grid plate and is used to move the electric arc toward the grid plate at the contact point; the grid plate forms at least two grid plate groups, and an arc-inducing channel is provided between the grid plate groups for moving the electric arc between the grid plate groups; the magnetizing component is disposed on the transfer channel and the arc-inducing channel to generate a magnetic field on the transfer channel and the arc-inducing channel to increase the moving speed of the electric arc.

[0009] Optionally, the arc extinguishing device further includes an arc-initiating assembly for forming the arc-initiating channel; the grid plates form a first grid plate group and a second grid plate group, and the arc-initiating channel connects the first grid plate group and the second grid plate group.

[0010] Optionally, the magnetizing element extends to cover the transfer channel and the arc-starting channel.

[0011] Optionally, the arc-initiating assembly includes at least two spaced-apart arc-initiating plates, and the magnetizing element is disposed on both sides of the arc-initiating channel and perpendicular to the arc-initiating plates.

[0012] Optionally, the grid plate further forms a third grid plate group, which is arranged opposite to the first grid plate group on both sides of one end of the arc-starting channel.

[0013] Optionally, the maximum width of the arc-initiating channel is smaller than that of the air-blowing channel.

[0014] Optionally, the maximum width of the arc-initiating channel is 0.5 to 0.9 times the maximum width of the air-blowing channel.

[0015] Optionally, the maximum width of the arc-initiating channel is 1 to 1.5 times the maximum width of the transfer channel.

[0016] Optionally, the magnetizing element is disposed between the arc-inducing plates.

[0017] Optionally, the magnetizing element is T-shaped.

[0018] Optionally, the magnetizing element is L-shaped.

[0019] This utility model provides an electrical switch, which includes the above-mentioned arc extinguishing device.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. This utility model provides magnetizing components in the transfer channel and the arc-starting channel. The magnetizing components form a magnetic field in the transfer channel and the arc-starting channel, which applies a force to the electric arc to increase the transfer speed of the electric arc and make it quickly approach the grid group or another grid group.

[0022] 2. This utility model provides an arc-initiating channel between the first grid plate group and the second grid plate group, and extends the magnetizing component to the arc-initiating channel, so that after the electric arc enters the housing, it first accelerates and approaches the first grid plate group to extinguish the arc. The remaining unextinguished arc continues to accelerate and approaches the second grid plate group under the action of the magnetizing component to extinguish the arc, thereby completely extinguishing the arc.

[0023] 3. This utility model, by setting the spacing of the arc-initiating plates, makes the gap in the arc-initiating channel smaller, which helps to concentrate the arc energy and increase the transfer speed of the arc. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the arc-extinguishing device in the first embodiment of the present invention;

[0025] Figure 2 for Figure 1 The diagram shows the locations of the transfer channel and the arc-starting channel of the arc-extinguishing device.

[0026] Figure 3 This is a schematic diagram of the arc-extinguishing device in the second embodiment of the present invention;

[0027] Figure 4 for Figure 3 The diagram shows the locations of the transfer channel and the arc-starting channel of the arc-extinguishing device.

[0028] Figure label:

[0029] 101. First grid plate group; 102. Second grid plate group; 103. Third grid plate group; 201. First stationary contact; 202. Moving contact; 301. Second stationary contact; 302. Extended contact plate; 4. Transfer channel; 5. Arc ignition channel; 6. Arc ignition plate; 7. Magnetizing component; 701. First magnetizing part 701; 702. Second magnetizing part 702; 8. Air blowing channel. Detailed Implementation

[0030] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0031] This utility model provides an arc-extinguishing device, referring to... Figure 1 and Figure 2 , or refer to Figure 3 and Figure 4 The arc-extinguishing device includes: a grid plate, a transfer channel 4, and a magnetizing element 7; the transfer channel 4 is connected to the grid plate and is used to move the electric arc toward the grid plate at the contact point; the grid plate forms at least two grid plate groups, and an arc-initiating channel 5 is provided between the grid plate groups for moving the electric arc between the grid plate groups; the magnetizing element 7 is disposed on the transfer channel 4 and the arc-initiating channel 5 and is used to form a magnetic field on the transfer channel 4 and the arc-initiating channel 5 to increase the moving speed of the electric arc.

[0032] In some specific embodiments, reference is made to Figure 1 and Figure 3 One end of the transfer channel 4 starts at the position where an electric arc is generated between the moving contact 202 and the stationary contact, and the other end is connected to the position of the grid plate.

[0033] In some specific embodiments, the transfer channel 4 can be enclosed by components to form a closed pipe, so that the power arc can be transferred within the pipe.

[0034] In some specific embodiments, the transfer channel 4 can be an open path, and the transfer channel 4 refers only to the transfer path of the electric arc.

[0035] In some specific embodiments, in order to shorten the distance of the transfer channel 4, after the arc extinguishing device is installed, the grid plate is close to the contact point, so that the transfer channel 4 is a narrow gap area between the grid plate and the contact point.

[0036] In some specific embodiments, the magnetizing element 7 is disposed on one side of the transfer channel 4.

[0037] In some specific embodiments, at least two of the magnetizing elements 7 are disposed opposite to each other on both sides of the transfer channel 4.

[0038] In some specific embodiments, the magnetizing element 7 is disposed around the transfer channel 4.

[0039] In some specific embodiments, the magnetizing element 7 can form a magnetic field by passing an electric current through a wire, an electromagnet, or a permanent magnet, and this utility model does not limit this.

[0040] In some specific embodiments, the contact includes a moving contact 202 and a stationary contact that cooperate with each other, and one end of the transfer channel 4 connects the area between the moving contact 202 and the stationary contact.

[0041] In some specific embodiments, reference is made to Figure 1 and Figure 3 The contact includes a movable contact 202 and a first stationary contact 201 that cooperate with each other, and includes an extended contact piece 302 and a second stationary contact 301. One end of the extended contact piece 302 is used to connect to the movable contact 202, and the other end is used to cooperate with the second stationary contact 301. The distance between the first stationary contact 201 and the second stationary contact 301 is adapted to the length of the extended contact piece 302.

[0042] In some specific embodiments, one end of the transfer channel 4 connects the area between the extended contact 302 and the second stationary contact 301.

[0043] In some embodiments of this utility model, reference is made to... Figure 1 and Figure 3 The arc extinguishing device further includes an arc-initiating assembly for forming an arc-initiating channel 5; the grid plates form a first grid plate group 101 and a second grid plate group 102, and the arc-initiating channel 5 connects the first grid plate group 101 and the second grid plate group 102.

[0044] In some specific embodiments, reference is made to Figure 1 and Figure 3A plurality of sheet-like grid plates are arranged in parallel along a third direction to form a grid plate group. The grid plate group includes a side with gaps and a side without gaps. The side without gaps is perpendicular to the third direction. One end of the arc-inducing channel 5 leads to the side without gaps on the grid plate group.

[0045] In some embodiments of this utility model, reference is made to... Figure 1 and Figure 3 The arc-starting channel 5 includes at least two spaced-apart arc-starting plates 6.

[0046] In some specific embodiments, reference is made to Figure 1 and Figure 3 The arc-inducing piece 6 is arranged in a direction parallel to the grid plate, and the arc-inducing piece 6 is arranged adjacent to the grid plate group.

[0047] In some specific embodiments, reference is made to Figure 1 and Figure 3 The end of the arc-inducing piece 6 extends to the central region of the grid piece.

[0048] In some specific embodiments, reference is made to Figure 1 and Figure 3 The arc-inducing plate 6 forms a U-shaped bend at one end near the grid plate.

[0049] In some specific embodiments, the first grid plate group 101 and the third grid plate group 103 are arranged along a first direction, and the magnetizing element 7 is arranged along a second direction. The first direction is perpendicular to the second direction, so that the first grid plate group 101, the second grid plate group 102 and the magnetizing element 7 are arranged around the arc-inducing channel 5.

[0050] In some specific embodiments, reference is made to Figure 1 and Figure 3 The first grid group 101 and the second grid group 102 are both arranged in parallel along the third direction, that is, in the horizontal right direction shown in the figure. The distance between the first grid group 101 and the contact point is smaller than the distance between the second grid group 102 and the contact point.

[0051] In some specific embodiments, one end of the arc-inducing piece 6 is located on the side of the first grid plate group 101 where there is no gap, and the other end extends to the side of the second grid plate group 102 where there is no gap.

[0052] In some specific embodiments, reference is made to Figure 1 and Figure 3Both the first grid plate group 101 and the second grid plate group 102 have two ends in the third direction. One end of the arc-inducing piece 6 is located at the tail end of the first grid plate group 101, and the other end of the arc-inducing piece 6 is located at the head end of the second grid plate group 102.

[0053] In some specific embodiments, reference is made to Figure 1 and Figure 3 The first end of the first grid plate group 101 protrudes from the first end of the second grid plate group 102 in the opposite direction of the third direction, and the tail end of the first grid plate group 101 protrudes from the tail end of the second grid plate group 102 in the third direction. The arc-inducing plate 6 has at least two bends.

[0054] In some embodiments of this utility model, reference is made to... Figure 1 The grid also includes a third grid group 103, which is disposed opposite to the first grid group 101.

[0055] In some embodiments of this utility model, the first grid group 101, the second grid group 102, and the third grid group 103 form a triangular layout.

[0056] In some embodiments of this utility model, the entrance of the arc-inducing channel 5 is located in the region between the first grid group 101 and the third grid group 103.

[0057] In some embodiments of this utility model, the second grid plate group 102 is provided at the outlet position of the arc-inducing channel 5.

[0058] In some specific embodiments, the third grid group 103 and the first grid group 101 are at the same distance from the contact point.

[0059] In some specific embodiments, reference is made to Figure 1 The grids forming the third grid group 103 are arranged in parallel along the third direction, so that the third grid group 103 has two ends in the third direction.

[0060] In some specific embodiments, reference is made to Figure 1 The arc-inducing assembly includes two spaced-apart arc-inducing plates 6, one of which is connected at both ends to the tail end of the first grid plate group 101 and the head end of the second grid plate group 102, and the other is connected at both ends to the head end of the third grid plate group 103 and the tail end of the second grid plate group 102.

[0061] In some embodiments of this utility model, reference is made to... Figure 1 and Figure 3 The arc-inducing plate 6 is parallel to the grid plate.

[0062] In some embodiments of this utility model, reference is made to... Figure 1 and Figure 2 , or refer to Figure 3 and Figure 4 The magnetizing element 7 extends and covers the arc-inducing channel 5.

[0063] In some embodiments of this utility model, reference is made to... Figure 1 and Figure 3 The magnetizing element 7 is disposed between the arc-inducing plates 6.

[0064] In some embodiments of this utility model, reference is made to... Figure 1 and Figure 3 The magnetizing element 7 is perpendicular to the arc-inducing plate 6.

[0065] In some embodiments of this utility model, the magnetizing component 7 is an integral piece.

[0066] In some embodiments of this utility model, the magnetizing component 7 is a separate unit.

[0067] In some specific embodiments, the magnetizing component 7 includes a first magnetizing part 701 and a second magnetizing part 702, which are detachably connected.

[0068] In some specific embodiments, the first magnetizing part 701 is located at the transfer channel 4.

[0069] In some specific embodiments, the first magnetizing portion 701 extends to the side of the grid assembly where there are no gaps.

[0070] In some specific embodiments, reference is made to Figure 1 The first grid group 101 and the third grid group 103 are arranged opposite each other to form a two-sided layout. The moving contact 202 and the stationary contact are also arranged on both sides. The area between the grid groups and the area between the contacts are connected to each other in a straight line.

[0071] In some embodiments of this utility model, reference is made to... Figure 1 The two arc-inducing plates 6 extend to the first grid plate group 101 and the third grid plate group 103 respectively, facing two opposite sides, so that the distance between the two opposite sides of the first grid plate group 101 and the third grid plate group 103 is greater than the distance between adjacent arc-inducing plates 6, that is, the distance between the two opposite sides of the first grid plate group 101 and the third grid plate group 103 is greater than the size of the arc-inducing channel 5.

[0072] In some specific embodiments, reference is made to Figure 1The magnetizing component 7 includes a first magnetizing part 701 and a second magnetizing part 702. The first magnetizing part 701 extends between the first grid plate group 101 and the third grid plate group 103. One end of the second magnetizing part 702 is connected to the first magnetizing part 701, and the other end extends between the arc-inducing plates 6. The cross-sectional dimension of the first magnetizing part 701 is larger than the cross-sectional dimension of the second magnetizing part 702. The magnetizing component 7 is a T-shaped component.

[0073] In some specific embodiments, when the magnetizing member 7 is sheet-shaped, the width of the first magnetizing part 701 is greater than the width of the second magnetizing part 702.

[0074] In some specific embodiments, reference is made to Figure 3 The moving contact 202 and the stationary contact are arranged on both sides. The first grid plate group 101 is disposed above the moving contact 202 or the stationary contact. The grid plates of the first grid plate group 101 are arranged in parallel along the third direction and extend to a position corresponding to a point between the moving contact 202 and the stationary contact. The arc-guiding plate 6 extends to the side of the first grid plate group 101.

[0075] In some specific embodiments, reference is made to Figure 3 The magnetizing component 7 includes a first magnetizing part 701 and a second magnetizing part 702. The first magnetizing part 701 extends to the side of the first grid plate group 101. One end of the second magnetizing part 702 is connected to the first magnetizing part 701, and the other end extends between the arc-inducing plates 6. The cross-sectional dimension of the first magnetizing part 701 is larger than the cross-sectional dimension of the second magnetizing part 702. The magnetizing plate is an L-shaped component.

[0076] In some embodiments of this utility model, the arc extinguishing device further includes a housing, and the grid plate and the magnetizing element 7 are disposed inside the housing.

[0077] In some embodiments of this utility model, the maximum width of the arc-initiating channel 5 is 0.5 to 0.9 times the maximum width of the air-blowing channel 8.

[0078] In some embodiments of this utility model, the arc extinguishing device further includes an air blowing channel 8, and the size of the arc ignition channel 5 is smaller than the size of the air blowing channel 8.

[0079] In some embodiments of this utility model, the maximum width of the arc-initiating channel 5 is less than the maximum width of the air-blowing channel 8.

[0080] In some embodiments of this utility model, the maximum width of the arc-initiating channel 5 is 20%-80% of the maximum width of the air-blowing channel 8.

[0081] In some specific embodiments, the maximum width of the arc-initiating channel 5 is 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, or 90% of the maximum width of the air-blowing channel 8.

[0082] In some embodiments of this utility model, the maximum width of the arc-initiating channel 5 is 1 to 1.5 times the maximum width of the transfer channel 4.

[0083] In some specific embodiments, the maximum width of the arc-initiating channel 5 is 100%, 105%, 110%, 115%, 120%, 125%, 130%, 135%, 140%, 145%, or 150% of the maximum width of the transfer channel 4.

[0084] This utility model embodiment also provides an electrical switch, which includes the above-mentioned arc extinguishing device.

[0085] In some embodiments of this utility model, the electrical switch includes a circuit breaker, contactor, relay, protector, or fuse. This utility model does not limit the type of electrical switch.

[0086] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0087] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0088] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0089] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0090] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0091] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An arc-extinguishing device, characterized in that, include: The grid plate, the transfer channel (4), and the magnetizing element (7); The transfer channel (4) is connected to the grid plate and is used to move the contact point toward the grid plate by means of an electric arc; The grid forms at least two grid groups, and an arc-starting channel (5) is provided between the grid groups for the power arc to move between the grid groups; The magnetizing element (7) is disposed on the transfer channel (4) and the arc-starting channel (5) to form a magnetic field on the transfer channel (4) and the arc-starting channel (5) to increase the moving speed of the electric arc.

2. The arc-extinguishing device according to claim 1, characterized in that, It also includes an arc-initiating assembly for forming the arc-initiating channel (5); the grid forms a first grid group (101) and a second grid group (102), and the arc-initiating channel (5) connects the first grid group (101) and the second grid group (102).

3. The arc-extinguishing device according to claim 1, characterized in that, The magnetizing element (7) extends to cover the transfer channel (4) and the arc-starting channel (5).

4. The arc-extinguishing device according to claim 2, characterized in that, The arc-initiating assembly includes at least two spaced-apart arc-initiating plates (6), and the magnetizing element (7) is disposed on both sides of the arc-initiating channel (5) and perpendicular to the arc-initiating plates (6).

5. The arc-extinguishing device according to claim 2, characterized in that, The grid also forms a third grid group (103), which is arranged opposite to the first grid group (101) on both sides of one end of the arc-starting channel (5).

6. The arc-extinguishing device according to claim 2, characterized in that, The maximum width of the arc-initiating channel (5) is smaller than that of the air-blowing channel (8).

7. The arc-extinguishing device according to claim 6, characterized in that, The maximum width of the arc-initiating channel (5) is 0.5 to 0.9 times the maximum width of the air-blowing channel (8).

8. The arc-extinguishing device according to claim 1, characterized in that, The maximum width of the arc-initiating channel (5) is 1 to 1.5 times the maximum width of the transfer channel (4).

9. The arc-extinguishing device according to claim 4, characterized in that, The magnetizing element (7) is disposed between the arc-inducing plates (6).

10. The arc-extinguishing device according to claim 1, characterized in that, The magnetizing element (7) is T-shaped.

11. The arc-extinguishing device according to claim 1, characterized in that, The magnetizing element (7) is L-shaped.

12. An electrical switch, characterized in that, Includes the arc-extinguishing device as described in any one of claims 1 to 10.

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