Arc extinguish chamber of switch

Abstract

An arc extinguish chamber of a switch belongs to the technical field of low-voltage apparatuses. Which comprises a pair of side walls and a plurality of grid sheets arrayed between the pair of side walls at intervals, and is characterized by further comprising a positioning piece, the positioning piece is located between the pair of side walls and comprises a base body and a plurality of insertion sheets, the insertion sheets extend from the base body to the same side and are arranged at intervals, and the positioning piece is located between the pair of side walls. And the insertion sheets are inserted between the adjacent grid sheets from the outer sides of the grid sheets. The grid plate has the advantages that the positioning pieces are arranged on the two sides of the grid plate, so that the grid plate can be limited, the adjacent grid plates can be better fixed, and the grid plate is prevented from shaking after an electric arc enters the grid plate.

Description

TECHNICAL FIELD

[0001] The utility model belongs to low voltage electrical apparatus technical field, concretely relates to a switch's arc-extinguishing chamber. BACKGROUND

[0002] Switch, especially disconnecting switch as important low voltage electrical apparatus, its realization controls to bear current to combine and separate, to satisfy to power supply network on-off management.

[0003] With the development of new energy, the high-voltage application scenarios of frame circuit breaker (or disconnecting switch) are more and more. The arc-extinguishing chamber capacity requirement is higher and higher. The existing arc-extinguishing chamber mostly adopts the metal grid of interval array to improve the arc voltage, thereby extinguishing the arc. The high-voltage application scenario needs more grid to meet the arc voltage to rise to the range of design requirement. Specifically, enough grid is needed to establish enough arc voltage to meet the breaking requirement under the high-voltage application scenario. However, the size of frame circuit breaker (or disconnecting switch) is limited, and in this environment, if the positioning of the grid is unreliable, the grid will shake when the arc enters the grid, at this time, the gap between adjacent grids cannot be guaranteed, resulting in arc-extinguishing failure. How to arrange as many grid numbers as possible in small size and realize reliable fixation is a difficulty in solving the above problems. SUMMARY

[0004] The utility model provides a switch's arc-extinguishing chamber, which is positioned by positioning members on both sides of the grid, so that the adjacent grids have better fixation effect, preventing the grid from shaking after the arc enters.

[0005] The utility model accomplishes the task in this way, a switch's arc-extinguishing chamber, including a pair of side walls, the grid arrayed between a pair of side walls, the grid is multiple, and is spaced from each other, also includes positioning member, the positioning member is located between a pair of side walls, the positioning member includes base body and insert sheet, the insert sheet is multiple, multiple the insert sheet extends to the same side from the base body and is spaced from each other, the insert sheet is inserted between adjacent grids from the outside of the grid.

[0006] In one specific embodiment of the utility model, positioning notches are provided on the grid, the positioning notches are located on both sides of the width direction of the grid, and the base body is embedded in the positioning notches.

[0007] In another specific embodiment of the utility model, multiple positioning members are installed on each side of the arrayed grid, and the entire arrayed grid is cooperated by the multiple positioning members.

[0008] In still another specific embodiment of the present application, one positioning member is installed on each side of the array of the grid, and one positioning member cooperates with the entire array of the grid.

[0009] In still another specific embodiment of the present application, one positioning member is installed on each side of the array of the grid, and one positioning member cooperates with the entire array of the grid.

[0010] In still another specific embodiment of the present application, the grid comprises a cutting area and a pair of grid legs, the pair of grid legs extends downward from two sides of the cutting area, and the positioning notch is located on the outer sides of the pair of grid legs.

[0011] In still another specific embodiment of the present application, the positioning notches on the two sides are at the same height in the height direction of the arc-extinguishing chamber.

[0012] In still another specific embodiment of the present application, the inserted piece closes the part of the grid leg below the inserted piece after being inserted.

[0013] In still another specific embodiment of the present application, the depth of the positioning notch is greater than or equal to the thickness of the base body.

[0014] In still another specific embodiment of the present application, the head of the inserted piece is in the shape of a wedge.

[0015] The present application has the beneficial effects of: the arc-extinguishing chamber comprises an array of grids, positioning members are arranged in the positioning notches on the two sides of the grid, the positioning members are clamped into the side of the grid, the grid is limited, the adjacent grids have better fixing effect, and the grid is prevented from shaking after the arc enters. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The present application has the beneficial effects of: the arc-extinguishing chamber comprises an array of grids, positioning members are arranged in the positioning notches on the two sides of the grid, the positioning members are clamped into the side of the grid, the grid is limited, the adjacent grids have better fixing effect, and the grid is prevented from shaking after the arc enters.

[0017] Figure 2 The present application has the beneficial effects of: the arc-extinguishing chamber comprises an array of grids, positioning members are arranged in the positioning notches on the two sides of the grid, the positioning members are clamped into the side of the grid, the grid is limited, the adjacent grids have better fixing effect, and the grid is prevented from shaking after the arc enters.

[0018] Figure 3 The present application has the beneficial effects of: the arc-extinguishing chamber comprises an array of grids, positioning members are arranged in the positioning notches on the two sides of the grid, the positioning members are clamped into the side of the grid, the grid is limited, the adjacent grids have better fixing effect, and the grid is prevented from shaking after the arc enters.

[0019] Figure 4 The present application has the beneficial effects of: the arc-extinguishing chamber comprises an array of grids, positioning members are arranged in the positioning notches on the two sides of the grid, the positioning members are clamped into the side of the grid, the grid is limited, the adjacent grids have better fixing effect, and the grid is prevented from shaking after the arc enters.

[0020] Figure 5 The present application has the beneficial effects of: the arc-extinguishing chamber comprises an array of grids, positioning members are arranged in the positioning notches on the two sides of the grid, the positioning members are clamped into the side of the grid, the grid is limited, the adjacent grids have better fixing effect, and the grid is prevented from shaking after the arc enters.

[0021] In the figure: 1. side wall; 2. grid, 21. positioning notch, 22. pull arc notch, 23. positioning recess, 24. card into boss; 3. arc chamber cover; 4. gas production, 41. left gas production, 42. right gas production; 5. deionization device, 51. deionization assembly, 52. insulating plate assembly; 6. dynamic arc initiation piece; 7. insulating sleeve; 10. moving contact; 20. static contact; 30. arc chamber; 100. positioning piece, 101. base body, 102. insert piece, 1021. head; 200. mounting stick. DETAILED DESCRIPTION

[0022] The specific embodiments of the utility model are described in detail below in combination with the drawings, but the description of the embodiments is not a limitation on the technical solutions, and any formal but not substantial changes according to the concept of the utility model should be regarded as the protection scope of the utility model.

[0023] In the following description, the directional or positional concepts of up, down, left, right, front and back are based on the positions shown in the corresponding drawings, which are only provided for the technical solutions of the utility model and simplify the description, so they should not be understood as special limitations on the technical solutions provided by the utility model.

[0024] As Figure 1 , the switch includes a contact system, the contact system includes a moving contact 10 and a static contact 20, the moving contact 10 is in contact or separated from the static contact 20 after rotation. The contact system is installed inside the housing of the switch, and usually the contact system is installed in the contact cavity inside the housing.

[0025] An arc chamber 30 is arranged above the moving contact 10 and the static contact 20, when the moving contact 10 and the static contact 20 are separated, an arc is generated, the arc enters the inside of the arc chamber 30 and is extinguished in the arc chamber 30.

[0026] As Figure 2 , Figure 3 , the arc chamber 30 is a schematic view. The arc chamber 30 includes a pair of side walls 1, a grid 2 and an arc chamber cover 3, the grid 2 is a plurality of grids, which are arranged at intervals between the pair of side walls 1. And the arc chamber cover 3 is located at the top of the arc chamber 30, and a vent hole is formed on the arc chamber cover 3. The pair of side walls 1 and the arc chamber cover 3 constitute the outer shell of the arc chamber 30.

[0027] In this embodiment, the pair of side walls 1 are tightened by screws after splicing, and the arc chamber cover 3 is fixed on the top of the pair of side walls 1 from above, and the installation and fixation are also realized by the screw fixation mode.

[0028] The side wall 1 and the cover 3 of the arc extinguishing chamber are usually made of thermosetting material, such as DMC or BMC. In order to meet the requirements of the material and the process, a plurality of process cavities are provided on the outer side of the side wall 1.

[0029] The arc extinguishing chamber 30 further comprises a pair of gas generating members 4, i.e. a left gas generating member 41 and a right gas generating member 42. The left gas generating member 41 and the right gas generating member 42 respectively wrap a corresponding one of a pair of legs of the grid sheet 2. When the gas generating members 4 are installed, an arc passage is formed between the left gas generating member 41 and the right gas generating member 42, which in this embodiment has a narrow slit structure.

[0030] See Figure 4 Fig. 3 is a schematic view of the grid sheets 2, which are arranged in parallel and spaced apart from each other. The grid sheets 2 can also be arranged in a spaced apart manner but not in parallel. In this embodiment, the grid sheets 2 have a plurality of types, which are arranged in a plurality of groups according to design requirements, and the plurality of groups are arranged in sequence, thereby forming the grid sheet group shown in the figure.

[0031] The grid sheet 2 comprises a cutting area and a pair of legs extending downward from both sides of the cutting area. The cutting area is used for cutting the arc to increase the arc voltage. The pair of legs is used to provide a magnetic field to pull the arc into the cutting area.

[0032] The grid sheet 2 has positioning notches 21 on both sides, which are located on both sides in the width direction of the grid sheet 2 and are used for cooperation with the positioning member 100 for installation. Preferably, the positioning notches 21 are located on both outer sides of the pair of legs. In terms of the height direction of the arc extinguishing chamber 30, the positioning notches 21 on both sides are at the same height.

[0033] The cutting area is provided with an arc pulling notch 22 at a position corresponding to the pair of legs. In this embodiment, the arc pulling notch 22 is triangular. Of course, the shape of the arc pulling notch 22 can be changed, such as a multi-layered arch-shaped notch. The arc pulling notch 22 is offset with respect to the center line in the height direction of the grid sheet 2. Thus, when the arc pulling notches 22 of adjacent grid sheets 2 are offset in different directions, the arc on the grid sheet 2 can be pulled, facilitating the extinguishing of the arc.

[0034] One positioning pit 23 is provided on one side of the arc pulling notch 22. The positioning pit 23 on one side of the arc pulling notch 22 is used for cooperation with the gas generating member 4. Since there is only one positioning pit 23 on one grid sheet 2, and the positioning pits 23 on adjacent grid sheets 2 are respectively located on both sides, the positioning pit 23 can cooperate with the left gas generating member 41 and the right gas generating member 42.

[0035] A card-in boss 24 is provided on one side of the gas outlet of the grid fin 2, i.e. the top of the grid fin 2, which is carded into the dielectric plate assembly 52 above the grid fin 2.

[0036] A pair of mounting rods 200 are also provided on the pair of grid fin legs of the grid fin 2 in the middle of the grid fin array. Specifically, the mounting rods 200 are a pair. The mounting rods 200 fix the corresponding grid fin 2 and the gas generating member 4, and the gas generating member 4 is fixed to the pair of side walls 1 by fasteners.

[0037] See Figure 3 The arc extinguishing chamber 30 also includes a dielectric plate assembly 52 above the grid fin 2, which is carded into the dielectric plate assembly 52 above the grid fin 2. The card-in boss 24 is embedded in the dielectric plate assembly 52, so that the card-in boss 24 and the dielectric plate assembly 52 can position the grid fin 2 and prevent the grid fin 2 from shaking.

[0038] More specifically, the dielectric plate assembly 52 is above the grid fin 2, and the dielectric plate assembly 52 is above the dielectric plate assembly 52. In this embodiment, the dielectric plate assembly 52 and the dielectric plate assembly 52 are stacked.

[0039] The arc extinguishing chamber 30 also includes a moving arc guide 6 corresponding to the moving contact 10, which guides the arc into the grid fin 2 of the array.

[0040] In order to improve the insulation, the arc extinguishing chamber 30 also includes an insulating sleeve 7, which is provided in the pair of side walls 1, and the screws for fixing the pair of side walls 1 pass through the insulating sleeve 7 to achieve screw fixation. The insulating sleeve 7 can prevent the arc gas from contacting the screws and prevent breakdown.

[0041] As Figure 5Fig. 1 is a schematic view of the positioning member 100. The positioning member 100 comprises a base body 101 and a plurality of inserts 102. The plurality of inserts 102 extend from the base body 101 to the same side and are arranged in parallel with each other, so that the positioning member 100 forms a comb structure. The positioning member 100 is located between a pair of side walls 1. When the positioning member 100 is installed in place, the base body 101 is embedded in the positioning notch 21, and the inserts 102 are inserted between adjacent grid plates 2 from the outside of the grid plate 2 to improve the fixing effect between adjacent grid plates. At the same time, due to the insertion of the inserts 102, the arc gas cannot enter the position of the grid plate leg, preventing the grid plate leg from being burned through by the gas production member.

[0042] The head 1021 of the insert 102 is arranged in a wedge shape.

[0043] A plurality of positioning members 100 are installed on one side of the array of grid plates 2, that is, the array of grid plates 2 is matched with the entire array of grid plates 2 by the plurality of positioning members 100. This arrangement reduces the processing difficulty of the positioning member 100. Of course, a long positioning member 100 can also be used to span the entire array of grid plates 2.

[0044] In the height direction of the arc extinguishing chamber 30, the plurality of positioning notches 21 on the array of grid plates 2 are at the same height, and the plurality of positioning members 100 are arranged in a head-to-head manner to realize the cooperation with the grid plates 2, which can be called a split structure. A long positioning member 100 spanning the entire array of grid plates 2 can be called a whole structure.

[0045] When the positioning notch 21 is located on the two outer sides of the grid plate leg, the insert 102 is inserted to close the part of the grid plate leg below the insert 102.

[0046] Preferably, the depth of the positioning notch 21 is greater than or equal to the thickness of the base body 101, so that when the positioning member 100 is installed in place, the positioning member 100 does not protrude from the side surface of the grid plate 2.

[0047] More preferably, the depth of the positioning notch 21 is equal to the thickness of the base body 101, so that when the positioning member 100 is installed in place, the outer surface of the positioning member 100 is flush with the side surface of the grid plate 2.

[0048] The above arrangement allows the inner side of the side wall 1 to be free of slotting, and the cooperation with the positioning member 100 can be achieved.

Claims

1. An arc chamber of a switch comprising a pair of side walls (1), a plurality of grids (2) arranged between the pair of side walls (1), the grids (2) being spaced apart from each other, characterized in that: The positioning member (100) is located between the pair of side walls (1), and comprises a base body (101) and a plurality of inserts (102). The plurality of inserts (102) extend from the base body (101) to the same side and are spaced apart from each other, and the inserts (102) are inserted from the outside of the grid sheet (2) between adjacent grid sheets (2).

2. A switch arc chamber according to claim 1, characterised in that: The positioning member (100) is located between the pair of side walls (1), and comprises a base body (101) and a plurality of inserts (102). The plurality of inserts (102) extend from the base body (101) to the same side and are spaced apart from each other, and the inserts (102) are inserted from the outside of the grid sheet (2) between adjacent grid sheets (2).

3. A switch arc chamber according to claim 2, characterised in that: The positioning member (100) is located between the pair of side walls (1), and comprises a base body (101) and a plurality of inserts (102). The plurality of inserts (102) extend from the base body (101) to the same side and are spaced apart from each other, and the inserts (102) are inserted from the outside of the grid sheet (2) between adjacent grid sheets (2).

4. A switch arc chamber according to claim 3, characterised in that: The positioning member (100) is located between the pair of side walls (1), and comprises a base body (101) and a plurality of inserts (102). The plurality of inserts (102) extend from the base body (101) to the same side and are spaced apart from each other, and the inserts (102) are inserted from the outside of the grid sheet (2) between adjacent grid sheets (2).

5. A switch arc chamber according to claim 2, characterized in that: The positioning member (100) is located between the pair of side walls (1), and comprises a base body (101) and a plurality of inserts (102). The plurality of inserts (102) extend from the base body (101) to the same side and are spaced apart from each other, and the inserts (102) are inserted from the outside of the grid sheet (2) between adjacent grid sheets (2).

6. A switch arc chamber according to claim 2, characterized in that: The positioning member (100) is located between the pair of side walls (1), and comprises a base body (101) and a plurality of inserts (102). The plurality of inserts (102) extend from the base body (101) to the same side and are spaced apart from each other, and the inserts (102) are inserted from the outside of the grid sheet (2) between adjacent grid sheets (2).

7. A switch arc chamber according to claim 6, characterised in that: The positioning member (100) is located between the pair of side walls (1), and comprises a base body (101) and a plurality of inserts (102). The plurality of inserts (102) extend from the base body (101) to the same side and are spaced apart from each other, and the inserts (102) are inserted from the outside of the grid sheet (2) between adjacent grid sheets (2).

8. A switch arc chamber according to claim 6, characterized in that: The positioning member (100) is located between the pair of side walls (1), and comprises a base body (101) and a plurality of inserts (102). The plurality of inserts (102) extend from the base body (101) to the same side and are spaced apart from each other, and the inserts (102) are inserted from the outside of the grid sheet (2) between adjacent grid sheets (2).

9. A switch arc chamber according to claim 2, characterized in that: The positioning member (100) is located between the pair of side walls (1), and comprises a base body (101) and a plurality of inserts (102). The plurality of inserts (102) extend from the base body (101) to the same side and are spaced apart from each other, and the inserts (102) are inserted from the outside of the grid sheet (2) between adjacent grid sheets (2).

10. A switch arc chamber according to claim 1, characterized in that: The positioning member (100) is located between the pair of side walls (1), and comprises a base body (101) and a plurality of inserts (102). The plurality of inserts (102) extend from the base body (101) to the same side and are spaced apart from each other, and the inserts (102) are inserted from the outside of the grid sheet (2) between adjacent grid sheets (2).

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