CN214477304U

CN214477304U - Arc extinguishing device

Info

Publication number: CN214477304U
Application number: CN202120187037.5U
Authority: CN
Inventors: 徐柏超; 辛娜; 卢志刚; 秦治斌
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2021-10-22
Anticipated expiration: 2031-01-22

Abstract

An arc extinguishing device comprises an arc extinguishing chamber and an exhaust structure arranged at an outlet of the arc extinguishing chamber, wherein the arc extinguishing chamber comprises a plurality of grid plates arranged at intervals, exhaust channels are respectively formed between a plurality of adjacent grid plates, a plurality of air guide channels which correspond to the exhaust channels one by one are arranged in the exhaust structure, each air guide channel is formed by alternately arranging a plurality of first air guide grooves and a plurality of second air guide grooves, one ends of the first air guide grooves and one ends of the second air guide grooves are respectively connected with the corresponding exhaust channels, the cross sectional areas of the first air guide grooves, which are far away from one ends of the corresponding exhaust channels, are respectively larger than the cross sectional areas of the second air guide grooves, which are far away from one ends of the corresponding exhaust channels, because the cross sectional areas of the first air guide grooves are larger, the glowing gas generated by electric arc can be smoothly discharged, and the second air guide grooves which are alternately arranged are smaller, the air pressure can be prevented from being reduced too fast, the problem of insufficient medium recovery capability is avoided.

Description

Arc extinguishing device

Technical Field

The utility model relates to a low-voltage apparatus field especially relates to an arc control device.

Background

The electric arc that the circuit breaker produced at the breaking process needs to go out through arc extinguishing chamber of arc extinguishing device fast, otherwise leads to accident and accident easily. But current arc control device design is unreasonable, if the exhaust effect is poor, leads to the circuit breaker to damage easily, if the exhaust effect is too good, leads to the medium recovery ability not enough easily, can damage the circuit breaker equally, is difficult to balance, and gapped between exhaust structure and the explosion chamber in addition leads to electric arc to puncture easily.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect, provide an arc control device of exhaust effect and medium recovery ability balance.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an arc control device, includes the explosion chamber and sets up the exhaust structure at the explosion chamber export, the explosion chamber includes the grid piece that a plurality of intervals set up, forms exhaust passage respectively between a plurality of adjacent grid pieces, be equipped with a plurality of air guide channel with exhaust passage one-to-one in the exhaust structure, air guide channel leads the air guide channel alternate arrangement by a plurality of first air guide grooves and a plurality of second and constitutes, the one end in a plurality of first air guide grooves, and the one end in a plurality of second air guide grooves is connected with the exhaust passage who corresponds respectively, and the cross sectional area who corresponds 100 one end of exhaust passage is kept away from in a plurality of first air guide grooves, is greater than the cross sectional area that a plurality of second air guide grooves kept away from and corresponds 100 one end of exhaust passage respectively.

Preferably, exhaust structure includes a plurality of guide plates with grid piece one-to-one, forms respectively between a plurality of guide plates the air guide passageway, one side of a plurality of guide plates is equipped with the chamfer respectively, and the chamfer opposite direction of two adjacent guide plates, forms between one side that adjacent guide plate is equipped with the chamfer first air guide groove, keep away from between one side of chamfer at adjacent guide plate form the second air guide groove.

Preferably, the first air guide groove comprises a second air guide space in a V-shaped structure and a first air guide space communicated between the second air guide space and the corresponding exhaust channel, the cross-sectional area of one end, far away from the first air guide space, of the second air guide space is larger than that of the first air guide space, and the first air guide space and the second air guide groove are respectively in a rectangular structure and have the same cross-sectional area.

Preferably, the exhaust structure further comprises a plurality of diversion strips which are respectively in one-to-one correspondence with the air guide channels, and the diversion strips are arranged at one ends, far away from the corresponding exhaust channels, of the corresponding air guide channels.

Preferably, one end of each flow guide strip, which is close to the corresponding air guide channel, is provided with an oblique angle, and two sides of each oblique angle are respectively provided with an oblique flow guide surface.

Preferably, the exhaust structure comprises a plurality of guide plates in one-to-one correspondence with the grid pieces, the air guide channels are formed among the guide plates respectively, one ends, far away from the guide strips, of the guide plates are abutted to the corresponding grid pieces respectively, and the distance from one ends, close to the guide strips, of the guide plates to the guide strips is 1-2 mm.

Preferably, exhaust structure includes along keeping away from a plurality of guide plates, a plurality of water conservancy diversion strip, the piece of putting out a fire, second packing ring, the net board and the arc-extinguish chamber that set gradually of explosion chamber direction.

Preferably, exhaust structure is including the first support and the second support that form frame-shaped structure, and a plurality of guide plates are connected between two relative sides of first support, and a plurality of water conservancy diversion strips are connected between two relative sides of second support, and first support and two sides that the guide plate is parallel form the installation boss to the protruding one side of keeping away from the explosion chamber respectively, second support, flame piece, second packing ring and the free otter board that disappears set up respectively between two installation bosses.

Preferably, the exhaust structure further comprises an arc-extinguishing chamber sleeved outside the first support, and the arc-extinguishing chamber is connected with the two mounting bosses through screws respectively; a first gasket is arranged between the second support and the flame extinguishing sheet, and a second gasket is arranged between the flame extinguishing sheet and the dissociation eliminating screen plate.

Preferably, the arc extinguishing chamber comprises two side plates which are arranged oppositely, and an arc striking plate and a plurality of grid plates which are connected between the two side plates, the grid plates are arranged in parallel and at intervals, gas generating plates are respectively arranged between two sides of the grid plates and the two side plates, the gas generating plates on two sides and between the two adjacent side plates form the exhaust channel in a surrounding mode, one end of the arc striking plate is located on the outermost side of the grid plates, and the other end of the arc striking plate is located on one side below the grid plates.

The utility model discloses an arc control device, the cross sectional area of first air guide groove is bigger, is favorable to the glowing gas smooth discharge that electric arc produced, and the second air guide groove that sets up in turn because cross sectional area is littleer, can prevent again that atmospheric pressure from reducing too fast, avoids appearing the problem that the medium recovery ability is not enough.

In addition, the guide plate can further cut and cool the electric arc, and the first air guide groove is formed by arranging the chamfer on one side of the guide plate, so that the design of alternative arrangement of the first air guide groove and the second air guide groove can be realized, and the guide plate has the characteristics of simple structure and convenience in processing.

Drawings

Fig. 1 is an exploded view of an arc extinguishing device according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of an arc extinguishing device according to an embodiment of the present invention;

fig. 3 is a partial enlarged view of the embodiment of fig. 2;

fig. 4 is a schematic structural diagram of a flow guide plate according to an embodiment of the present invention;

fig. 5 is a cross-sectional view of a baffle according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a flow guide strip according to an embodiment of the present invention;

fig. 7 is a cross-sectional view of a gib according to an embodiment of the present invention.

Detailed Description

As shown in fig. 1 to 3, the arc extinguishing apparatus of the present invention includes an arc extinguishing chamber and an exhaust structure disposed at an outlet of the arc extinguishing chamber, wherein the arc extinguishing chamber includes a plurality of grid plates 110 disposed at intervals, and exhaust channels 100 are respectively formed between a plurality of adjacent grid plates 110;

the exhaust structure is internally provided with a plurality of air guide channels which are in one-to-one correspondence with the exhaust channels 100, each air guide channel is formed by alternately arranging a plurality of first air guide grooves 210 and a plurality of second air guide grooves 220, one ends of the plurality of first air guide grooves 210 and one ends of the plurality of second air guide grooves 220 are respectively connected with the corresponding exhaust channels 100, and the cross sectional areas of the ends, corresponding to the exhaust channels 100, of the plurality of first air guide grooves 210 are far away, and are respectively larger than the cross sectional areas, corresponding to one ends of the exhaust channels 100, of the plurality of second air guide grooves 220.

The utility model discloses an arc control device, first air guide groove 210's cross sectional area is bigger, is favorable to the glowing gas of electric arc production to discharge smoothly, and the second air guide groove 220 that sets up in turn because cross sectional area is littleer, can prevent again that atmospheric pressure from reducing too fast, avoids appearing the problem that the medium recovery ability is not enough.

The following describes the arc extinguishing device according to the present invention with reference to the embodiments shown in fig. 1 to 7. The arc extinguishing device of the present invention is not limited to the description of the following embodiments.

As shown in fig. 2 to 5, the exhaust structure includes a plurality of baffles 230 corresponding to the grid plates 110 one to one, the air guide channels are respectively formed between the plurality of baffles 230, one end of each baffle 230 is respectively in contact with the corresponding grid plate 110, and one end of each baffle 230 away from the corresponding grid plate 110 gradually shrinks towards one side, so that one side of each baffle 230 forms an inclined expansion surface, and the shrinking directions of two adjacent baffles 230 are opposite. It will be appreciated that the extended surface may also be formed by providing a chamfer 231 on one side of the baffle 230. The distance between the sides of the adjacent baffles 230 with the extended surfaces is increased, and the first air guide groove 210 is formed; the distance between the sides of the adjacent baffles 230 remote from the extended surface is constant and forms the second air guide slots 220.

In the exhaust structure of the embodiment, the guide plate 230 is flame-retardant and insulating, so that the arc rises to the position and can be further cut and cooled, and the chamfer 231 is arranged on one side of the guide plate 230 to form the first air guide groove 210, so that the design of alternating arrangement with the second air guide grooves 220 can be realized, and the exhaust structure has the characteristics of simple structure and convenience in processing. Of course, a groove may be directly formed on the first bracket 310 instead of the guide plate 230 to form an air guide channel, which all belong to the protection scope of the present invention.

Specifically, the exhaust structure comprises a first bracket 310 in a frame-shaped structure, a plurality of baffles 230 are connected between two opposite sides of the first bracket 310, the overall cross section of the baffle 230 is in a right-angle trapezoidal structure, and the baffle 230 comprises a flow guide part 232 in a rectangular structure, and an expansion part 233 in a right-angle triangular structure;

the distance between the flow guiding parts 232 of the adjacent flow guiding plates 230 is equal to the distance between the corresponding grid pieces 110, a first air guiding space 211 of a rectangular structure is formed between the flow guiding parts 232 of the adjacent flow guiding plates 230, and the bottom surfaces of the flow guiding parts 232 are in contact with the top surfaces of the corresponding grid pieces 110;

one right-angle side of the extension part 233 is connected to the top surface of the flow guide part 232, the other right-angle side of the extension part 233 is flush with the side surface of one side of the flow guide part 232 to form a side wall of the second air guide groove 220, the oblique side connected between the two right-angle sides of the extension part 233 is an extension surface, a second air guide space 212 of a V-shaped structure is formed between the extension surfaces of the adjacent flow guide plates 230, the first air guide space 211 is communicated between the bottom of the second air guide space 212 and the corresponding exhaust passage 100 to form a first air guide groove 210 together with the second air guide space 212, namely, one end of the first air guide groove 210 is the first air guide space 211 of a rectangular structure, the other end of the first air guide groove is the second air guide space 212 of a V-shaped structure, and both ends of the second air guide groove 220 are the first air guide space 211 of a rectangular structure.

In this embodiment, the distances between the two flow guiding plates 230 and the flow guiding portions 232 are not changed, that is, the cross-sectional areas of the ends of the first air guiding grooves 210 and the second air guiding grooves 220, which are communicated with the corresponding exhaust passages 100, are equal, but the distance between the expanding portions 233 is increased along the direction away from the corresponding grid 110, in this embodiment, not only the cross-sectional area of the end of the first air guiding groove 210, which is away from the corresponding exhaust passage 100, is larger than the cross-sectional area of the end of the second air guiding groove 220, which is away from the corresponding exhaust passage 100, but also the cross-sectional areas of the two ends of the first air guiding groove 210 are different, which results in different air pressures at the two ends of the first air guiding groove 210, and simultaneously improves the exhaust effect of the first air guiding groove 210, because the cross-sectional area of the end of the first air guiding groove 210, which is away from the corresponding exhaust passage 100, is large, which results in small air pressure at the end, and the cross-sectional area of the end of the first air guiding groove 210, which is close to the corresponding exhaust passage 100, is small, therefore, the arc gas in the first gas guiding groove 210 is more easily moved from the end with a small gas pressure to the end with a large gas pressure, that is, is moved away from the end corresponding to the exhaust passage 100, and is more easily exhausted out of the arc extinguishing chamber.

Of course, the diversion plates 230 may also take other shapes, such as a right triangle with a whole cross section, which is equivalent to eliminating the rectangular diversion part 232 and leaving only the triangular extension part 233, so that the distance between two diversion plates 230 increases linearly, i.e. the cross-sectional area of the first air guiding groove 210 increases linearly in a direction away from the corresponding grid 110.

Or, the whole cross section of the guide plate 230 may be rectangular, which is equivalent to the extension portion 233 without triangle, and the guide portion 232 only having the rectangular shape keeps the distance between the two guide plates 230 unchanged, that is, the cross sectional area of the first air guide groove 210 is unchanged, but the cross sectional area of the first air guide groove 210 far away from the end corresponding to the exhaust passage 100 is larger than the cross sectional area of the second air guide groove 220 far away from the end corresponding to the exhaust passage 100, so as to ensure that the first air guide groove 210 discharges the arc gas more easily, and the cross sectional area of the other portion of the first air guide groove 210 may be equal to the cross sectional area of the second air guide groove 220, or even smaller, which all belong to the protection scope of the present invention.

As shown in fig. 2-3 and 6-7, the exhaust structure further includes a plurality of guide bars 240 disposed at intervals, and the plurality of guide bars 240 are disposed at an end of the plurality of guide plates 230 away from the corresponding arc extinguishing chamber.

Further, the plurality of guide strips 240 are provided with oblique angles 241 in an isosceles triangle structure near one end of the guide plate 230, inclined guide surfaces 242 are respectively formed on two sides of the oblique angles 241, and the inclined guide surfaces 242 on two sides of the guide plate 230 can cool the arc gas corresponding to the gas guide channel in a shunting manner and prevent the gas from returning to the interior of the arc extinguish chamber.

Further, the plurality of guide strips 240 and the plurality of guide plates 230 are arranged in a staggered manner, and the distance between adjacent guide strips 240 is equal to the distance between adjacent guide plates 230, so that the central axes of the plurality of guide strips 240 correspond to the central axes of the air guide channels formed between the guide plates 230 one by one, and the guide strips 240 are located at one ends of the corresponding air guide channels far away from the exhaust channel 100.

As shown in fig. 1, the arc extinguishing chamber includes two side plates 120 disposed opposite to each other, and an arc striking plate 130 and a plurality of grid plates 110 connected between the two side plates 120, the grid plates 110 are disposed in parallel and spaced apart from each other, gas generating plates 140 are respectively disposed between two sides of the grid plates 110 and the two side plates 120, the exhaust channel 100 is defined between two adjacent side plates 120 and between the gas generating plates 140 on two sides, the arc striking plate 130 is in an L-shaped structure, one end of the arc striking plate 130 is located on the outermost side of the grid plates 110, and the other end of the arc striking plate 130 is located on the left side below the grid plates 110 and is used for attracting the arc to move towards the grid plates 110, and the gas generating plates 140 can generate gas when contacting the arc, thereby increasing the pressure of the exhaust channel 100 and accelerating the discharge of the arc current.

As shown in fig. 1-4, the exhaust structure includes a first bracket 310 formed in a frame structure, a plurality of baffles 230 are connected between two opposite sides of the first bracket 310, two sides of the first bracket 310 parallel to the baffles 230, that is, two opposite sides not connected to the baffles 230, are respectively protruded to one side far away from the arc-extinguishing chamber to form mounting bosses 311, a second bracket 320, a first gasket 330, a flame-extinguishing sheet 340, a second gasket 350 and a deionization net plate 360 are sequentially disposed between the two mounting bosses 311, a plurality of flow-guiding strips 240 are connected between two opposite sides of the second bracket 320, one ends of the plurality of baffles 230 far away from the flow-guiding strips 240 respectively abut against corresponding grid plates 110, a distance from one end of the plurality of baffles 230 near the flow-guiding strips 240 to the flow-guiding strips 240 is 1-2mm, the distance can be adjusted according to a breaking grade, so as to prevent a rising arc from escaping out of the area of the grid plates 110 to be broken, the exhaust structure further comprises an arc-extinguishing cover 370 sleeved on the outer side of the first support 310, a screw hole 312 matched with the screw 380 is formed in the mounting boss 311, the screw 380 penetrates through the arc-extinguishing cover 370 and is inserted into the screw hole 312, and the arc-extinguishing cover 370 is connected with the mounting boss 311.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. The utility model provides an arc control device, includes the explosion chamber and sets up the exhaust structure at the explosion chamber export, the explosion chamber includes grid (110) that a plurality of intervals set up, forms exhaust passage (100) respectively between a plurality of adjacent grid (110), its characterized in that: the exhaust structure is internally provided with a plurality of air guide channels which are in one-to-one correspondence with the exhaust channels (100), each air guide channel is formed by alternately arranging a plurality of first air guide grooves (210) and a plurality of second air guide grooves (220), one ends of the first air guide grooves (210) and one ends of the second air guide grooves (220) are respectively connected with the corresponding exhaust channels (100), and the cross sectional areas of the first air guide grooves (210) far away from one ends of the corresponding exhaust channels (100) are respectively larger than the cross sectional areas of the second air guide grooves (220) far away from one ends of the corresponding exhaust channels (100).

2. The arc extinguishing device of claim 1, wherein: the exhaust structure comprises a plurality of guide plates (230) which are in one-to-one correspondence with the grid pieces (110), the air guide channels are formed among the guide plates (230), chamfers (231) are arranged on one sides of the guide plates (230), the chamfers (231) of two adjacent guide plates (230) are opposite in direction, the first air guide groove (210) is formed between the sides, provided with the chamfers (231), of the adjacent guide plates (230), and the second air guide groove (220) is formed between the sides, far away from the chamfers (231), of the adjacent guide plates (230).

3. The arc extinguishing device of claim 1, wherein: the first air guide groove (210) comprises a second air guide space (212) in a V-shaped structure and a first air guide space (211) communicated between the second air guide space (212) and the corresponding exhaust channel (100), the cross-sectional area of one end, away from the first air guide space (211), of the second air guide space (212) is larger than that of the first air guide space (211), and the first air guide space (211) and the second air guide groove (220) are respectively in a rectangular structure and equal in cross-sectional area.

4. An arc extinguishing device according to any of claims 1-3, characterized in that: the exhaust structure further comprises a plurality of flow guide strips (240) which are in one-to-one correspondence with the air guide channels, and the flow guide strips (240) are arranged at one ends, far away from the corresponding exhaust channels (100), of the corresponding air guide channels.

5. The arc extinguishing device of claim 4, wherein: one end of the flow guide strip (240) close to the corresponding air guide channel is provided with an oblique angle (241), and two sides of the oblique angle (241) are respectively provided with an inclined flow guide surface (242).

6. The arc extinguishing device of claim 4, wherein: the exhaust structure comprises a plurality of guide plates (230) which are in one-to-one correspondence with the grid pieces (110), the air guide channels are formed among the guide plates (230), one ends, far away from the guide strips (240), of the guide plates (230) are abutted to the corresponding grid pieces (110), and the distance from one ends, close to the guide strips (240), of the guide plates (230) to the guide strips (240) is 1-2 mm.

7. The arc extinguishing device of claim 1, wherein: the exhaust structure comprises a plurality of guide plates (230), a plurality of guide strips (240), a flame extinguishing sheet (340), a second gasket (350), a deionization mesh plate (360) and an arc extinguishing cover (370) which are sequentially arranged along the direction far away from the arc extinguishing chamber.

8. The arc extinguishing device of claim 7, wherein: the exhaust structure comprises a first support (310) and a second support (320) which are of a frame-shaped structure, a plurality of guide plates (230) are connected between two opposite sides of the first support (310), a plurality of guide strips (240) are connected between two opposite sides of the second support (320), two parallel sides of the first support (310) and the guide plates (230) form mounting bosses (311) in a protruding mode towards one side far away from the arc extinguish chamber respectively, and the second support (320), the flame extinguishing sheet (340), a second gasket (350) and the deionization net plate (360) are arranged between the two mounting bosses (311) respectively.

9. The arc extinguishing device of claim 8, wherein: the exhaust structure further comprises an arc-extinguishing cover (370) sleeved on the outer side of the first support (310), and the arc-extinguishing cover (370) is connected with the two mounting bosses (311) through screws (380); a first gasket (330) is arranged between the second bracket (320) and the flame extinguishing sheet (340), and a second gasket (350) is arranged between the flame extinguishing sheet (340) and the deionization screen plate (360).

10. The arc extinguishing device of claim 1, wherein: the arc extinguishing chamber comprises two side plates (120) which are arranged oppositely, an arc striking plate (130) and a plurality of grid plates (110) which are connected between the two side plates (120), the grid plates (110) are arranged in parallel and at intervals, gas generating plates (140) are respectively arranged between two sides of the grid plates (110) and the two side plates (120), the exhaust channel (100) is enclosed between the two adjacent side plates (120) and the gas generating plates (140) on the two sides, one end of the arc striking plate (130) is located on the outermost side of the grid plates (110), and the other end of the arc striking plate (130) is located on one side below the grid plates (110).