Arc extinguishing device and circuit breaker

Abstract

The utility model relates to the technical field of low-voltage switching devices, in particular to an arc extinguishing device and a circuit breaker. The arc extinguishing device provided by the utility model comprises a contact system, an arc extinguishing chamber and an arc running piece, the arc extinguish chamber comprises a plurality of arc extinguish grid sheets, and all the arc extinguish grid sheets are sequentially arranged at intervals to form a grid sheet group; the arc-extinguishing grid sheet is provided with a pair of leg parts, and an end surface is arranged between the pair of leg parts, so that the arc-extinguishing grid sheet is U-shaped; the arc running piece is arranged on one side of the grid piece group along the arrangement direction of the arc extinguishing grid pieces, and the arc running piece is electrically connected with the contact system; the arc running piece comprises a main arc running plate and at least one run-on plate, the run-on plate is connected to at least one side face of the two side faces of the main arc running plate and located on the side, facing the grid piece set, of the main arc running plate, and the run-on plate corresponds to the end face. The run-on plate is connected to at least one of the two side faces of the main run-off plate and located on the side, facing the grid piece set, of the main run-off plate, so that the run-on plate does not need to be holed, and the heat capacity of the run-on plate is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to low voltage switch electric appliance technical field especially is related to an arc extinguishing device and circuit breaker. BACKGROUND

[0002] The conventional under-arc-extinguishing layout on the market adopts the structure of long arc guide plate to guide the arc to transfer to the end of arc-extinguishing chamber, but the cutting depth of the end grid under this structure is limited, and the common improvement means is to bend the long arc guide plate into parallel with the grid, so that the arc can go deep into the abdomen of the end grid. But the bent long arc guide plate will hinder the air flow discharge. In order to solve the problem of air discharge obstruction, a notch is opened at the bending position of the long arc guide plate to release the gas.

[0003] But after opening the hole at the bending position of the long arc guide plate, the opening position will affect the arc transfer to some extent, and after opening the hole, the heat capacity of the long arc guide plate decreases, and if the arc stops at the position near the opening and burns stably, it is easy to burn the long arc guide plate. SUMMARY

[0004] The utility model aims at providing an arc extinguishing device and circuit breaker to solve the technical problem that in the prior art, the long arc guide plate is bent into parallel with the grid, and a hole is opened at the bending position, which causes the opening position to affect the arc transfer to some extent, and after opening the hole, the heat capacity of the long arc guide plate decreases, and if the arc stops at the position near the opening and burns stably, it is easy to burn the long arc guide plate.

[0005] The utility model provides an arc extinguishing device, which comprises a contact system, an arc-extinguishing chamber and an arc runner.

[0006] The arc-extinguishing chamber comprises a plurality of arc-extinguishing grids, and all the arc-extinguishing grids are sequentially and spacedly arranged to form a grid group.

[0007] The arc-extinguishing grid is provided with a pair of leg portions, and a pair of the leg portions has an end face, so that the arc-extinguishing grid is in U shape.

[0008] Along the arrangement direction of the arc-extinguishing grid, the arc runner is arranged on one side of the grid group, and the arc runner is electrically connected with the contact system.

[0009] The arc runner comprises a main arc runner plate and at least one arc guide plate, the arc guide plate is connected to at least one side surface of the two side surfaces of the main arc runner plate, and is located on the side of the main arc runner plate facing the grid group, and the arc guide plate corresponds to the end face.

[0010] As a further technical solution, the end face is provided with at least one arc cutting groove, and at least one of the arc guide plates corresponds to the part between the arc cutting groove and the leg portion of the end face.

[0011] As a further technical scheme, the arc striking plate is provided with a multi-stage stepped structure at one end away from the main arc running plate.

[0012] Along the arc running direction of the main arc running plate, the multi-stage stepped structure is an ascending stepped structure.

[0013] Along the ascending direction of the multi-stage stepped structure, the gap between the multi-stage stepped structure and the end face of the grid piece group gradually decreases.

[0014] As a further technical scheme, the main arc running plate and the arc striking plate have a first included angle α, the first included angle α is greater than 80° and less than 100°.

[0015] As a further technical scheme, along the arc running direction of the main arc running plate, the main arc running plate and the arc extinguishing grid piece gradually approach the end face of the main arc running plate.

[0016] As a further technical scheme, the arc striking plate and the arc cutting groove are both provided with two, and the two arc striking plates are respectively located on the left and right sides of the main arc running plate in the arc running direction.

[0017] As a further technical scheme, the arc striking plate is provided with two, the arc cutting groove is provided with one, and the two arc striking plates are respectively located on the left and right sides of the main arc running plate in the arc running direction.

[0018] As a further technical scheme, the arc extinguishing chamber further comprises a pair of oppositely arranged insulation pieces, the pair of insulation pieces are located between the pair of legs, and the pair of insulation pieces are respectively wrapped on the pair of legs.

[0019] As a further technical scheme, the contact system comprises a movable contact and a stationary contact.

[0020] The movable contact is electrically connected with the arc running piece, and / or the stationary contact is electrically connected with the arc running piece.

[0021] The circuit breaker provided by the utility model comprises the arc extinguishing device.

[0022] Compared with the prior art, the arc extinguishing device and the circuit breaker provided by the utility model have the following technical advantages:

[0023] The arc extinguishing device provided by the utility model, comprising: a contact system, an arc extinguishing chamber and an arc running piece; the arc extinguishing chamber comprises a plurality of arc extinguishing louver pieces, and all the arc extinguishing louver pieces are sequentially and spacedly arranged to form a louver piece group; the arc extinguishing louver piece is provided with a pair of leg portions, and the pair of leg portions have an end face, so that the arc extinguishing louver piece is in a U shape; along the arrangement direction of the arc extinguishing louver piece, the arc running piece is arranged on one side of the louver piece group, and the arc running piece is electrically connected with the contact system; the arc running piece comprises a main arc running plate and at least one arc leading plate, the arc leading plate is connected to at least one side surface of the two side surfaces of the main arc running plate, and is located on the side of the main arc running plate facing the louver piece group, and the arc leading plate corresponds to the end face.

[0024] Since the arc leading plate is connected to at least one side surface of the two side surfaces of the main arc running plate and is located on the side of the main arc running plate facing the louver piece group, the arc leading plate does not need to be provided with an opening, and the heat capacity of the arc leading plate is ensured.

[0025] The circuit breaker provided by the utility model comprises the arc extinguishing device, and therefore the technical advantages and effects achieved by the arc extinguishing device are achieved, and will not be described in detail here.

[0026] Other features and advantages of the utility model will be described in detail in the following specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the drawings needed to be used in the following specific embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are some embodiments of the utility model, and other drawings can also be obtained by those skilled in the art without creative labor.

[0028] Figure 1 The arc extinguishing device structure schematic view provided by the embodiment of the utility model is shown in the figure;

[0029] Figure 2 The arc running piece structure schematic view provided by the embodiment of the utility model is shown in the figure;

[0030] Figure 3 The arc running piece and louver piece group cooperation schematic view provided by the embodiment of the utility model is shown in the figure;

[0031] Figure 4 The arc running piece and arc extinguishing chamber cooperation structure schematic view provided by the embodiment of the utility model is shown in the figure;

[0032] Figure 5 The arc running piece and arc extinguishing chamber cooperation structure schematic view provided by the embodiment of the utility model is shown in the figure;

[0033] Figure 6 The arc running piece and arc extinguishing chamber cooperation structure schematic view provided by the embodiment of the utility model is shown in the figure;

[0034] Icon: 1 - arc chamber; 2 - arc runner; 3 - arc extinguishing grid; 4 - grid group; 5 - main arc runner plate; 6 - arc leading plate; 7 - arc cutting groove; 8 - multi-stage stepped structure; 9 - leg; 10 - insulating piece; 11 - protruding tooth; 12 - moving contact; 13 - stationary contact; 14 - end face. DETAILED DESCRIPTION

[0035] The technical solutions of the present application will be described below in conjunction with the embodiments, obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0036] In the description of the present application, it should be pointed out that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the device or element indicated or implied to have a specific orientation, structure and operation, therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present application, it should be pointed out that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection required by the present application.

[0039] The present application will be described in further detail below through specific embodiments and in conjunction with the drawings.

[0040] The specific structure is shown in Figures 1 to 6 .

[0041] The embodiment provides an arc extinguishing device, which comprises a contact system, an arc extinguishing chamber 1 and an arc runner 2.

[0042] The arc extinguishing chamber 1 comprises a plurality of arc extinguishing vanes 3, and the arc extinguishing vanes 3 are sequentially and spacedly arranged to form a vane group 4.

[0043] The arc extinguishing vane 3 is provided with a pair of leg portions 9, and the pair of leg portions 9 has an end face 14, so that the arc extinguishing vane 3 is in a U shape.

[0044] The arc runner 2 is arranged on one side of the vane group 4 along the arrangement direction of the arc extinguishing vane 3, and the arc runner 2 is electrically connected with the contact system.

[0045] The arc runner 2 comprises a main arc runner plate 5 and at least one arc guiding plate 6, the arc guiding plate 6 is connected to at least one side of two side faces of the main arc runner plate 5 and is located on one side of the main arc runner plate 5 facing the vane group 4, and the arc guiding plate 6 corresponds to the end face 14.

[0046] In the embodiment, the arc guiding plate 6 is connected to at least one side of two side faces of the main arc runner plate 5 and is located on one side of the main arc runner plate 5 facing the vane group 4, so that the arc guiding plate 6 does not need to be opened, and the heat capacity of the arc guiding plate 6 is ensured.

[0047] In an optional technical scheme of the embodiment, the end face 14 is provided with at least one arc cutting groove 7, and at least one arc guiding plate 6 corresponds to the part of the end face 14 between the arc cutting groove 7 and the leg portion 9. The arrangement of the arc cutting groove 7 can improve the arc extinguishing effect of the vane group 4, and meanwhile, the arc guiding plate 6 does not hinder the air outlet above the arc cutting groove 7 on the arc extinguishing vane 3.

[0048] In an optional technical scheme of the embodiment, the end of the arc guiding plate 6 away from the main arc runner plate 5 is provided with a multi-stage ladder structure 8.

[0049] Along the arc running direction of the main arc runner plate 5, the multi-stage ladder structure 8 is an ascending ladder.

[0050] Along the ascending direction of the multi-stage ladder structure 8, the gap between the multi-stage ladder structure 8 and the end face 14 of the vane group 4 gradually decreases.

[0051] In the embodiment, since the arc is not in an ideal central state in an actual state, the end of the arc guiding plate 6 away from the main arc runner plate 5 is provided with a multi-stage ladder structure 8, and the multi-stage ladder structure 8 is an ascending ladder along the arc running direction of the main arc runner plate 5, so that different electric field gradients can be formed between the arc guiding plate 6 and the arc extinguishing vane 3, and after the electric field breakdown between the multi-stage ladder structure 8 and the arc extinguishing vane 3, the arc is more easily guided to the end of the arc extinguishing chamber 1, and the arc extinguishing effect is improved.

[0052] In an optional technical solution of the embodiment, the first included angle a between the main arc running plate 5 and the arc leading plate 6 is greater than 80° and less than 100°. The specific angle can be selected as long as the requirement is met.

[0053] In the embodiment, the first included angle a is between 85° and 90°. The arc leading effect is better.

[0054] In an optional technical solution of the embodiment, along the arc running direction of the main arc running plate 5, the end surface 14 of the arc extinguishing grid sheet 3 facing the main arc running plate 5 is parallel to the main arc running plate 5, or gradually approaches the main arc running plate 5.

[0055] In an optional technical solution of the embodiment, the arc leading plate 6 and the arc cutting groove 7 are both provided with two, and the two arc leading plates 6 are respectively located on the left and right sides of the main arc running plate 5 in the arc running direction.

[0056] In the embodiment, the arc leading plate 6 is provided on the left and right sides of the main arc running plate 5 in the arc running direction, and the arc leading plate 6 is integrally formed with the main arc running plate 5. The left and right sides of the main arc running plate 5 close to the end part of the arc extinguishing chamber 1 are formed with the arc leading plate 6, which is stable in structure and convenient to manufacture.

[0057] The embodiment is not limited to this, and the specific number of the arc leading plate 6 can be determined according to the requirement.

[0058] In the embodiment, the arc leading plate 6 is provided with two, and the arc cutting groove 7 is provided with one, and the two arc leading plates 6 are respectively located on the left and right sides of the main arc running plate 5 in the arc running direction.

[0059] In the embodiment, by providing a pair of legs 9 on the arc extinguishing grid sheet 3 and arranging the arc running piece 2 between the pair of legs 9, the arc can enter the arc cutting groove 7 better, and the arc extinguishing effect is improved.

[0060] In an optional technical solution of the embodiment, the arc extinguishing chamber 1 further comprises a pair of oppositely arranged insulation pieces 10, the pair of insulation pieces 10 are both located between the pair of legs 9, and the pair of insulation pieces 10 are respectively wrapped on the pair of legs 9.

[0061] In the embodiment, the arc running piece 2 is arranged between the pair of insulation pieces 10, and the insulation piece 10 can wrap the leg 9 structure of the arc extinguishing grid sheet 3 after installation, so that the insulation effect is improved.

[0062] In an optional technical solution of the embodiment, along the arrangement direction of the arc extinguishing grid sheet 3 in the grid sheet group 4, a plurality of protruding teeth 11 are arranged on the insulation piece 10, and the protruding teeth 11 are inserted between adjacent arc extinguishing grid sheets 3.

[0063] In the embodiment, the insulating piece 10 is inserted between the adjacent arc-extinguishing vane 3 through the protruding tooth 11, so that the protruding tooth 11 is provided between each adjacent arc-extinguishing vane 3, which not only ensures the insulation effect, but also facilitates the installation of the insulating piece 10.

[0064] In the alternative technical scheme of the embodiment, the contact system comprises a moving contact 12 and a stationary contact 13.

[0065] The moving contact 12 is electrically connected with the arc running piece 2, and / or the stationary contact 13 is electrically connected with the arc running piece 2.

[0066] In the embodiment, the arc running piece 2 can be provided with one, in which case the stationary contact 13 can be directly connected with the main arc running plate 5 of the arc running piece 2, or the moving contact 12 can be connected with the main arc running plate 5 of the arc running piece 2 through movement; the arc running piece 2 can also be provided with two, one main arc running plate 5 of the arc running piece 2 is connected with the stationary contact 13, and the other main arc running plate 5 of the arc running piece 2 is correspondingly matched with the moving contact 12, so that the moving contact 12 can be connected with the main arc running plate 5 of the arc running piece 2 through movement.

[0067] The circuit breaker provided in the embodiment comprises the arc-extinguishing device, and thus the technical advantages and effects achieved by the circuit breaker include those achieved by the arc-extinguishing device, which will not be described herein.

[0068] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, but not to limit them; although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. An arc extinguishing device, characterized in that The application relates to an arc extinguishing device. The arc extinguishing device comprises a contact system, an arc extinguishing chamber (1) and an arc runner (2). The arc extinguishing chamber (1) comprises a plurality of arc extinguishing blades (3), and the arc extinguishing blades (3) are sequentially and spacedly arranged to form a blade group (4). The arc extinguishing blade (3) is provided with a pair of legs (9), and the pair of legs (9) are provided with an end face (14) therebetween, so that the arc extinguishing blade (3) is in a U shape. The arc runner (2) is arranged on one side of the blade group (4) along the arrangement direction of the arc extinguishing blade (3), and the arc runner (2) is electrically connected with the contact system. The arc runner (2) comprises a main arc runner plate (5) and at least one arc guiding plate (6), the arc guiding plate (6) is connected to at least one side of the two side faces of the main arc runner plate (5), and is located on the side of the main arc runner plate (5) facing the blade group (4), and the arc guiding plate (6) corresponds to the end face (14).

2. The device of claim 1, wherein, The end face (14) is provided with at least one arc cutting groove (7), and the arc guiding plate (6) corresponds to the part of the end face (14) between the arc cutting groove (7) and the leg (9).

3. The device of claim 1, wherein, The end of the arc guiding plate (6) away from the main arc runner plate (5) is provided with a multi-stage stepped structure (8). Along the arc running direction of the main arc runner plate (5), the multi-stage stepped structure (8) is an ascending stepped structure. Along the ascending direction of the multi-stage stepped structure (8), the gap between the multi-stage stepped structure (8) and the end face (14) of the blade group (4) gradually decreases.

4. The device of claim 1, wherein, The first included angle alpha between the main arc runner plate (5) and the arc guiding plate (6) is greater than 80 degrees and less than 100 degrees.

5. The device of claim 1, wherein, Along the arc running direction of the main arc runner plate (5), the main arc runner plate (5) is parallel to the end face (14) of the arc extinguishing blade (3) facing the main arc runner plate (5), or the main arc runner plate (5) gradually approaches the end face (14) of the arc extinguishing blade (3) facing the main arc runner plate (5).

6. The device of claim 2, wherein: The arc guiding plate (6) and the arc cutting groove (7) are both provided with two, and the two arc guiding plates (6) are respectively located on the left and right sides of the main arc runner plate (5) in the arc running direction.

7. The device of claim 2, wherein: The arc guiding plate (6) is provided with two, and the arc cutting groove (7) is provided with one, and the two arc guiding plates (6) are respectively located on the left and right sides of the main arc runner plate (5) in the arc running direction.

8. The device of any of claims 1-5, wherein, The arc extinguishing chamber (1) further comprises a pair of oppositely arranged insulation members (10), and the pair of insulation members (10) are respectively arranged between the pair of legs (9).

9. The device of any of claims 1-5, wherein, The contact system comprises a moving contact (12) and a static contact (13). The moving contact (12) is electrically connected with the arc runner (2), and / or the static contact (13) is electrically connected with the arc runner (2).

10. A circuit breaker characterized by, The application further relates to the arc extinguishing device according to any one of claims 1-9.

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