CN219435729U - Arc extinguishing device of circuit breaker - Google Patents
Arc extinguishing device of circuit breaker Download PDFInfo
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- CN219435729U CN219435729U CN202122639382.0U CN202122639382U CN219435729U CN 219435729 U CN219435729 U CN 219435729U CN 202122639382 U CN202122639382 U CN 202122639382U CN 219435729 U CN219435729 U CN 219435729U
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Abstract
The arc extinguishing device of the circuit breaker comprises a left arc partition wall, a right arc partition wall, an arc striking sheet, arc extinguishing grid sheets, a plurality of layers of arc baffles, flame extinguishing grids, an end cover and a gas producing sheet, wherein foolproof lugs are arranged at every other position at the bottom of an arc extinguishing grid sheet mounting groove of the left arc partition wall and the right arc partition wall, and foolproof lugs with staggered positions are arranged on arc baffle slots; the arc extinguishing grating sheet is provided with an eccentric arc striking notch and a fool-proof notch; the fool-proof notch is arranged on one side or both sides of the arc-extinguishing grid sheet, the arc-extinguishing grid sheet is arranged in the two left and right arc-separating walls, and the front and back sides between the two adjacent arc-extinguishing grid sheets are arranged; the arc striking pieces are arranged in the two left and right arc separating walls; the positions of the air outlet holes on each upper and lower arc-shaped baffle plates are staggered left and right, one side or the left and right sides of each arc-shaped baffle plate is respectively provided with a fool-proof notch, and the air generating sheet is fixedly connected with the left and right arc-shaped baffle walls; the flame-extinguishing grille is arranged on the end cover. The utility model can lengthen the arc without increasing the appearance of the arc extinguishing device, improve the breaking capacity and effectively eliminate the overflow of metal ions.
Description
Technical Field
The utility model relates to a circuit breaker, in particular to a contact arc extinguishing device of the circuit breaker.
Background
The arc extinguishing device is a key component of the circuit breaker, and is used for rapidly introducing high-temperature and high-voltage arc generated at the moment of breaking the contact of the circuit breaker into the arc extinguishing device, and elongating, cutting off and rapidly cooling the arc to achieve an arc extinguishing effect. As is known, when the contact is broken, the longer the arc is, the higher the arc voltage is, the current limiting function can be effectively achieved, and the circuit breaker is an important improvement scheme for improving breaking capacity.
The current arc extinguishing device is for elongating the electric arc, the height of the arc extinguishing chamber is deliberately increased, thereby increasing the number of arc extinguishing grid sheets, and a plurality of arc baffles and filter screens with meshes are arranged above the grid sheets, so as to achieve the purpose of eliminating metal ions.
Disclosure of Invention
Aiming at overcoming the defects of the prior art that the arc of the existing arc extinguishing device is not long and metal ions overflow, the utility model provides the arc extinguishing device of the circuit breaker, which can lengthen the arc without increasing the appearance of the arc extinguishing device, improve breaking capacity and effectively eliminate the overflow of the metal ions.
The utility model solves the problems by adopting the following technical scheme:
the arc extinguishing device of the circuit breaker comprises a left arc partition wall, a right arc partition wall, an arc striking sheet, an arc extinguishing grid sheet, a multi-layer arc barrier sheet, an flame extinguishing grid, an end cover and a gas production sheet, wherein the inner sides of the left arc partition wall and the right arc partition wall are respectively provided with a mounting hole for mounting the gas production sheet, an assembly fixing hole, an arc extinguishing device mounting hole, a mounting groove for mounting a limiting arc striking sheet and the arc extinguishing grid sheet and a slot for mounting the arc barrier sheet; foolproof convex blocks are arranged at every other position at the bottom of the arc extinguishing grid sheet mounting groove of the left and right arc separation walls, and the foolproof convex blocks are arranged on one or both of the left and right arc separation walls; fool-proof convex blocks with staggered positions are arranged on the arc-proof plate slots; the arc extinguishing grid sheet is provided with an eccentric arc striking notch and a fool-proof notch; the fool-proof notch is arranged on one side or both sides of the arc extinguishing grid sheet, and the fool-proof notch is matched with fool-proof lugs of the left and right arc separation walls in shape and size; the arc-extinguishing grid plates are arranged in the installation grooves of the arc-extinguishing grid plates in the middle of the two left and right arc-separating walls, and the front and back surfaces between the two adjacent arc-extinguishing grid plates are arranged; the arc striking pieces are arranged in arc striking piece mounting grooves above arc extinguishing grid pieces in the two left and right arc separating walls; the gas outlet holes with a set size proportion are respectively arranged on each layer of the multi-layer arc-shaped plate, the gas outlet holes on each layer of the upper and lower arc-shaped plates are arranged in a staggered manner left and right, and fool-proof notches matched with fool-proof convex blocks staggered on arc-shaped plate slots in the arc-shaped wall are respectively arranged on one side or the left and right sides of each layer of the arc-shaped plates to prevent incorrect assembly; the gas generating sheet is fixedly connected with the mounting holes of the gas generating sheets on the left arc partition wall and the right arc partition wall; the flame-extinguishing grille is arranged on the end cover.
Further, the gas generating sheets are riveted and connected with the mounting holes of the gas generating sheets on the left and right partition arc walls through rivets;
still further, the flame extinguishing grid is the shutter structure form, the flame extinguishing grid is insulating material integral type suppression and forms, and both ends are the installation piece, and the installation is matchedly with the flame extinguishing grid mounting groove on the end cover.
Preferably, the flame-extinguishing grille is provided with at least 2 pieces, and the lower and upper 2 pieces of flame-extinguishing grille are installed in opposite directions or in the same direction.
At least two metal filter screens are arranged between the bottom of the end cover and the flame-extinguishing grille, and the flame-extinguishing grille is used for pressing and fixing the metal filter screens in the end cover.
Still further, the end cover is provided with spacing respectively in left and right sides face. The limiting strips fix the arc separation walls on the inner side of the end cover 9, so that high-pressure gas generated by electric arcs is prevented from rushing apart the two arc separation walls; the other function of the limiting strip is to transversely attach to the base plane matched with the product, so that a gap formed after the arc extinguishing device and the circuit breaker body are assembled is prevented, and an arc longitudinally overflows from the outer sides of the left arc partition wall and the right arc partition wall.
The end cover is formed by pressing insulating materials, a plurality of radiating air outlet square holes are formed in the surface of the end cover, flame extinguishing grid mounting grooves are formed in the end cover, the flame extinguishing grid is matched with the end cover in size, and the end cover is fixedly mounted with the left arc partition wall and the right arc partition wall through mounting screws.
The beneficial effects of the utility model are as follows: at the breaking moment of the moving and static contacts, high-voltage electric arcs are introduced into arc striking notches of arc extinguishing grid plates, and because foolproof notches of two adjacent arc extinguishing grid plates are matched with an arc separating wall, foolproof protruding blocks on the arc separating wall are arranged at intervals, the two adjacent arc extinguishing grid plates are installed on the front side and the back side after being assembled, so that the adjacent arc striking notches eccentric on the arc extinguishing grid plates are staggered with each other, the straight-line electric arcs of arc extinguishing devices with the same height are changed into S-shaped electric arcs, the total length of the electric arcs can be prolonged without increasing the height of the arc extinguishing devices, and the breaking capacity of products is improved; the multi-layer arc-isolating plates are arranged on the slots of the left arc-isolating wall and the right arc-isolating wall, the distance between the multi-layer arc-isolating plates can be controlled by utilizing the distance between two adjacent slots on the arc-isolating walls, the separation plates between the multi-layer arc-isolating plates are omitted, the production cost is reduced, and the slots are provided with foolproof lugs, so that each layer of arc-isolating plates can be prevented from being assembled wrongly, and the arc-extinguishing reliability is improved; the flame extinguishing grille adopts an integral shutter window type structure, so that the trend of an electric arc can be conveniently adjusted according to design requirements, and metal ions are prevented from falling into the circuit breaker or affecting a circuit outside the circuit breaker.
Drawings
Fig. 1 is a schematic exploded view of an arc extinguishing device of a circuit breaker according to an embodiment of the present utility model.
Fig. 2 is an overall structural view of an arc extinguishing device in an embodiment of the present utility model.
Fig. 3 is a diagram of the structure of the left and right partition walls in the embodiment of the present utility model.
Fig. 4 is a block diagram of an arc chute in an embodiment of the utility model.
Fig. 5 is a schematic view of the overall installation of arc extinguishing bars and the arc trend in an embodiment of the utility model.
Fig. 6 is a diagram of the end cap cover structure in an embodiment of the utility model.
Fig. 7 is a schematic view showing the opposite installation of two flame-extinguishing grids in an embodiment of the present utility model.
Fig. 8 is a schematic view of the same direction installation of two flame-extinguishing grids in an embodiment of the utility model.
Fig. 9 is a schematic view showing the reverse installation of three flame-extinguishing grids in the embodiment of the present utility model.
FIG. 10 is a view showing the installation of the arc wall and the multi-layer arc shield fool-proof structure in the embodiment of the utility model.
FIG. 11 is a schematic view of the arc free gas flow direction when two flame-extinguishing grids are installed in the same direction in an embodiment of the utility model.
FIG. 12 is a schematic view of the arc free gas flow direction when two flame-extinguishing grids are installed in opposite directions in an embodiment of the utility model.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
Referring to fig. 1 to 12, an arc extinguishing device for a circuit breaker comprises a left arc partition wall 1, a right arc partition wall 2, an arc striking sheet 3, an arc extinguishing grid sheet 4, an arc shielding sheet 5, an arc shielding sheet 6, an arc shielding sheet 7, a flame extinguishing grid 8, a metal filter screen 10, an end cover 9, an air generating sheet 12 and a fixing screw 11.
As shown in fig. 3 and 10, the inner sides of the left arc partition wall 1 and the right arc partition wall 2 are respectively provided with mounting holes 104 and 204 for mounting the gas generating sheet 12, mounting fixing holes 107 and 207, arc extinguishing device mounting holes 108 and 208, an arc striking sheet limiting mounting groove 106, an arc extinguishing grid sheet limiting mounting groove 103 and an arc barrier inserting mounting groove 101; the arc striking piece 3 is arranged in an arc striking piece mounting groove 206 in the left and right arc separating walls 1 and 2; foolproof lugs 103 are arranged at every other position at the bottom of the arc-extinguishing grid sheet mounting groove 105 of the left partition wall 1, foolproof lugs 203 are arranged at every other position in the notch adjacent to the foolproof lugs 103 at the bottom of the arc-extinguishing grid sheet mounting groove 205 of the right partition wall 2, namely, if the arc-extinguishing grid sheet grooves 105 with odd numbers are provided with lugs 103 according to the same initial direction on the left partition wall 1, the arc-extinguishing grid sheet grooves 205 with even numbers on the right partition wall 2 are provided with lugs 203; conversely, if the arc extinguishing grid grooves 105 with even numbers of the left arc separating wall 1 are provided with the convex blocks 103, the arc extinguishing grid grooves 205 with odd numbers of the right arc separating wall 2 are provided with the convex blocks 203; the arc-barrier slots 101 and 201 are respectively provided with fool-proof protruding blocks 102 and 202 with staggered positions and spacing bars 109 and 209 for spacing the arc-barrier 5, the arc-barrier 6 and the arc-barrier 7, the spacing between adjacent bars 109 and 209 controls the gaps between the arc-barriers 5, 6 and 7, and the number of the arc-barriers is not limited to 3 and can be one or more.
As shown in fig. 10 to 12, each layer of the multi-layer arc baffles 5, 6 and 7 is respectively provided with an air outlet 502 with a set size proportion, and the positions of the air outlets on each layer of the upper arc baffles and the lower arc baffles are staggered left and right and are shown by small arrows in fig. 11 and 12; a fool-proof notch 501 which is matched with the fool-proof lug 103 staggered on the arc-proof plate slot in the arc-proof walls 1 and 2 in shape and size is arranged on one side or both sides of each arc-proof plate, so that the misloading of the arc-proof plates in the direction is prevented;
as shown in fig. 4 to 5, the arc extinguishing grid 4 is provided with an arc striking notch 403 eccentric to a central line 404, and a fool-proof notch 401 is provided at one side of the rear end, and the shape and size of the fool-proof notch are matched with those of fool-proof projections of the left and right arc separating walls. The other side can be provided with a fool-proof notch 402 with a shape and a size different from 401, or without a fool-proof notch; the arc extinguishing grid plates 4 are arranged in the installation grooves 105 of the arc extinguishing grid plates in the middle of the two left and right arc separation walls 1 and 2, and the foolproof gaps 402 on the arc extinguishing grid plates 4 are matched with foolproof convex blocks 103 arranged at every other position at the bottom of the arc extinguishing grid plate installation grooves 105 of the left and right arc separation walls 1 and 2, so that the front and back sides between the two adjacent arc extinguishing grid plates 4 after assembly are installed, and arc striking notches 403 on the arc extinguishing grid plates 4 are staggered left and right to form S-shaped arc striking notches 400;
as shown in fig. 1, 2 and 6, the end cover 9 is made of insulating material by pressing, the surface is provided with a plurality of radiating air outlet square holes 905, the left and right side surfaces are respectively provided with a limit strip 901, the inside is provided with a flame extinguishing grid mounting groove 902 and mounting points 801 on the left and right sides of the flame extinguishing grid 8, the size of the mounting points is matched, and the end cover 9 and the left and right arc separating walls 1 and 2 are fixedly mounted by mounting screws 11; after assembly, the arc separation wall 1 and the arc separation wall 2 are fixed on the inner side of the end cover 9 by limit strips 901 on the left side surface and the right side surface of the end cover 9 shown in fig. 2, so that high-pressure gas generated by electric arcs is prevented from rushing away the two arc separation walls; the other function of the limit strip 901 is to transversely attach to the base plane matched with the product, so that a gap formed after the arc extinguishing device and the circuit breaker body are assembled is prevented, and an arc longitudinally overflows from the outer sides of the left arc partition wall and the right arc partition wall.
As shown in fig. 7 to 12, the flame-extinguishing grille 8 adopts an integral shutter structure, mounting points 801 matched with the flame-extinguishing grille mounting grooves 902 in the end cover 9 are arranged on the left side and the right side, one or more flame-extinguishing grille 8 can be mounted, and when the plurality of flame-extinguishing grille 8 is mounted, the flame-extinguishing grille 8 can be spliced into a 'or' < '> shape shown in fig. 7, a' shape shown in fig. 8, and a positive and negative 'S' shape shown in fig. 9, so that the trend of an electric arc can be adjusted according to design requirements; the metal filter screen 10 is arranged between the bottom of the end cover 9 and the flame extinguishing grid 8, so that metal ions or high-voltage electric arcs are prevented from overflowing to influence a circuit outside the circuit breaker.
In the embodiment, each adjacent arc striking notch on the arc extinguishing grid plates arranged on the front side and the back side of the arc extinguishing device is staggered left and right, when the moving and static contacts break large current, the arc is staggered from the arc striking notch of the lowest arc extinguishing grid plate to the arc striking notch of the adjacent arc extinguishing grid plate, which is equivalent to the fact that a straight arc is evolved into an S-shaped arc, and the total distance of the arc is lengthened under the condition that the height of an arc extinguishing chamber is not increased, so that the current limiting effect is achieved; the left arc-separating wall, the right arc-extinguishing grid plate and the arc-extinguishing plate are provided with foolproof devices, so that the problem of incorrect assembly caused by incorrect operation of operators can be effectively solved, and the performance of the product can meet the design requirement; the installation slots are arranged on the left arc partition wall and the right arc partition wall, so that an interlayer frame for controlling the distance between the arc partitions during installation of a plurality of arc partitions is omitted, and the production cost is reduced; the limiting strips on the left side and the right side of the end cover wrap the left arc separating wall and the right arc separating wall on the inner side of the end cover, so that rivet connection fixedly installed between the two arc separating walls of a conventional arc extinguishing device is omitted, procedures and materials are saved, production cost is reduced, and meanwhile, after the limiting strips on the left side and the right side of the end cover are matched and installed with the circuit breaker body, high-voltage arcs longitudinally overflowing the arc extinguishing device on the two sides of the left arc separating wall and the right arc separating wall can be effectively covered, and a circuit above the circuit breaker is protected from being damaged; the flame-extinguishing grille adopts an integral shutter type structure, single-layer or multi-layer superposition can be selected according to design requirements, and different effect exhaust modes can be achieved when the multi-layer superposition is used, so that the selectivity of products and the universality of parts are stronger;
the embodiments described in this specification are merely illustrative of the manner in which the inventive concepts may be implemented. The scope of the present utility model should not be construed as being limited to the specific forms set forth in the embodiments, but the scope of the present utility model and the equivalents thereof as would occur to one skilled in the art based on the inventive concept.
Claims (6)
1. The arc extinguishing device of the circuit breaker is characterized by comprising a left arc separating wall, a right arc separating wall, an arc striking sheet, an arc extinguishing grating sheet, a multi-layer arc-isolating plate, an flame extinguishing grating, an end cover and a gas producing sheet, wherein the inner sides of the left arc separating wall and the right arc separating wall are respectively provided with a mounting hole for mounting the gas producing sheet, an assembly fixing hole, an arc extinguishing device mounting hole, a mounting groove for mounting a limiting arc striking sheet and the arc extinguishing grating sheet and a slot for mounting the arc isolating plate; foolproof convex blocks are arranged at every other position at the bottom of the arc extinguishing grid sheet mounting groove of the left and right arc separation walls, and the foolproof convex blocks are arranged on one or both of the left and right arc separation walls; fool-proof convex blocks with staggered positions are arranged on the arc-proof plate slots; the arc extinguishing grid sheet is provided with an eccentric arc striking notch and a fool-proof notch; the fool-proof notch is arranged on one side or both sides of the arc extinguishing grid sheet, and the fool-proof notch is matched with fool-proof lugs of the left and right arc separation walls in shape and size; the arc-extinguishing grid plates are arranged in the installation grooves of the arc-extinguishing grid plates in the middle of the two left and right arc-separating walls, and the front and back surfaces between the two adjacent arc-extinguishing grid plates are arranged; the arc striking pieces are arranged in arc striking piece mounting grooves above arc extinguishing grid pieces in the two left and right arc separating walls; the gas outlet holes with a set size proportion are respectively arranged on each layer of the multi-layer arc-shaped plate, the gas outlet holes on each layer of the upper and lower arc-shaped plates are arranged in a staggered manner left and right, and fool-proof notches matched with fool-proof convex blocks staggered on arc-shaped plate slots in the arc-shaped wall are respectively arranged on one side or the left and right sides of each layer of the arc-shaped plates to prevent incorrect assembly; the gas generating sheet is fixedly connected with the mounting holes of the gas generating sheets on the left arc partition wall and the right arc partition wall; the flame-extinguishing grille is arranged on the end cover.
2. The arc extinguishing device of the circuit breaker according to claim 1, wherein the flame extinguishing grille is in a shutter structure, the flame extinguishing grille is formed by integrally pressing insulating materials, and two ends of the flame extinguishing grille are provided with mounting blocks which are matched with the mounting grooves of the flame extinguishing grille on the end cover.
3. The arc extinguishing device of the circuit breaker according to claim 1, wherein the flame extinguishing grids are provided with at least 2 pieces, and the lower and upper 2 pieces of flame extinguishing grids are installed in opposite directions or in the same direction.
4. The arc extinguishing apparatus for circuit breaker according to claim 1, wherein the metal filter screen is installed between the bottom of the end cap cover and the flame-extinguishing grill, and is held down and fixed in the end cap cover by the flame-extinguishing grill.
5. The arc extinguishing device of the circuit breaker according to claim 1 or 2, wherein the left and right side surfaces of the end cover are respectively provided with a limit strip.
6. The arc extinguishing device of the circuit breaker according to claim 5, wherein the end cover is made of insulating materials by pressing, a plurality of radiating air outlet square holes are formed in the surface, flame extinguishing grid mounting grooves are formed in the inner portion, the sizes of the flame extinguishing grid are matched with those of the flame extinguishing grid, and the end cover is fixedly mounted with the left arc partition wall and the right arc partition wall by mounting screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122639382.0U CN219435729U (en) | 2021-11-01 | 2021-11-01 | Arc extinguishing device of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122639382.0U CN219435729U (en) | 2021-11-01 | 2021-11-01 | Arc extinguishing device of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219435729U true CN219435729U (en) | 2023-07-28 |
Family
ID=87341097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122639382.0U Active CN219435729U (en) | 2021-11-01 | 2021-11-01 | Arc extinguishing device of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219435729U (en) |
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2021
- 2021-11-01 CN CN202122639382.0U patent/CN219435729U/en active Active
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