A kind of arc extinguishing chamber structure

Abstract

The utility model relates to the technical field of circuit breakers, and in particular to an arc extinguishing chamber structure, comprising a plurality of arc extinguishing grids arranged at intervals and a first guard plate and a second guard plate respectively arranged on both sides of the arc extinguishing grids, wherein the first guard plate and the second guard plate are matched to fix the plurality of arc extinguishing grids, each of the arc extinguishing grids is recessed with an arc striking groove, the inner side wall of the arc striking groove is arranged in an inclined manner, each of the arc extinguishing grids is recessed with at least one arc striking opening at a position corresponding to the inner bottom wall of the arc striking groove, the inner wall of the arc striking opening is arranged in an arc shape, and the positions where the plurality of arc striking openings are distributed are arranged in an arc shape relative to the first guard plate. The arc extinguishing chamber of the utility model has a plurality of arc extinguishing grids arranged at intervals, each of the arc extinguishing grids is provided with an arc striking groove and an arc striking opening, and when the electric arc enters the arc extinguishing chamber, it moves along the arc striking openings distributed in an arc shape, so that the electric arc is more easily elongated and split, the speed of arc extinguishing is improved, and the contact is prevented from being burned.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to an arc extinguishing chamber structure. Background Art

[0002] A circuit breaker is a switch device that can close, carry and interrupt the current under normal circuit conditions and close, carry and interrupt the current under abnormal circuit conditions within a specified time. The arc extinguishing chamber is an important part of the circuit breaker, which is used to quickly extinguish the arc when the circuit is disconnected to prevent equipment damage.

[0003] The structure of the arc extinguishing chamber has a particularly important influence on the arc extinguishing performance. The arc extinguishing chamber is generally composed of several arc extinguishing grids arranged at intervals and a guard plate that fixes the several arc extinguishing grids. After the arc enters the arc extinguishing chamber, it is divided into many short arcs by the arc extinguishing grids. When the AC current passes through zero, all the short arcs are extinguished at the same time. The existing arc extinguishing chamber has poor arc striking ability, and the arc is easily concentrated at the arc entry position on the side of the arc extinguishing chamber close to the contact. The arc enters the arc extinguishing grid and is cut slowly, which leads to a slow arc extinguishing speed. The contacts are easily damaged by ablation when the arc stays for a long time. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide an arc extinguishing chamber structure. The arc extinguishing chamber of the utility model has a plurality of arc extinguishing grids arranged at intervals, each of which is provided with an arc striking groove and an arc striking opening. When the arc enters the arc extinguishing chamber, it moves along the arc striking openings distributed in an arc shape, so that the arc is more easily elongated and split, thereby improving the speed of arc extinguishing and preventing the contacts from being burned.

[0005] The technical solution adopted by the utility model is as follows: an arc extinguishing chamber structure, comprising a plurality of arc extinguishing grids arranged at intervals and a first guard plate and a second guard plate respectively arranged on both sides of the arc extinguishing grids, the first guard plate and the second guard plate are matched to fix the plurality of arc extinguishing grids, each of the arc extinguishing grids is recessed with an arc-striking groove, the inner side wall of the arc-striking groove is inclined, each of the arc extinguishing grids is recessed with at least one arc-striking opening at a position corresponding to the inner bottom wall of the arc-striking groove, the inner wall of the arc-striking opening is arranged in an arc shape, and the positions of the plurality of arc-striking openings are arranged in an arc shape relative to the first guard plate.

[0006] The arc-starting openings on the arc-extinguishing grids arranged at the edges of both sides are closer to the first guard plate than the arc-starting openings on the arc-extinguishing grids arranged in the middle.

[0007] One end of the plurality of arc-extinguishing grids corresponding to the arc-starting opening is the arc-entering end, and the plurality of arc-extinguishing grids are arranged at intervals in an arc shape and shrink toward the arc-entering end.

[0008] The first guard plate is provided with a mounting hole for the arc-extinguishing grid to pass through, and a mounting plate is embedded in the mounting hole. A groove matching the mounting plate is provided on one side of each arc-extinguishing grid, and each arc-extinguishing grid is plugged into the mounting hole with the mounting plate through the groove.

[0009] The mounting plate is also in an arc shape that matches the arrangement position of the arc-extinguishing grids. A first disassembly opening is recessed on one side of the mounting hole, and a first disassembly plate extends from one end of the mounting plate toward the first disassembly opening.

[0010] A fixing plate is embedded in the end surface of the second guard plate in contact with the arc-extinguishing grid, and each of the arc-extinguishing grids is provided with a fixing end on the side away from the groove. The fixing plate is provided with a fixing hole for the fixing end to be plugged in and matched with, and a second disassembly and assembly port is recessed on the second guard plate, and a second disassembly and assembly plate is extended from one end of the fixing plate toward the second disassembly and assembly port.

[0011] The first disassembly plate is provided with a first inclined surface toward the interior of the first disassembly port, the end of the second disassembly plate is provided with a second inclined surface toward the interior of the second disassembly port, and gaps are provided between the first disassembly port and the end of the first disassembly plate and between the second disassembly port and the end of the second disassembly plate.

[0012] The beneficial effects of the utility model are as follows: the arc extinguishing chamber of the utility model has a plurality of arc extinguishing grids arranged at intervals, each arc extinguishing grid is provided with an arc striking groove and an arc striking port, the inclined arc striking groove of the inner wall and the arc striking port structure of the inner wall can reduce the resistance of the arc entering the arc extinguishing chamber, the arc can be quickly and fully introduced between each arc extinguishing grid, and the position of the arc striking port on each arc extinguishing grid is different, that is, the arc-shaped arrangement position, when the arc enters the arc extinguishing chamber, it moves along the arc-shaped arc striking port, so that the arc is easier to be elongated and divided, thereby improving the arc extinguishing speed and preventing the contacts from being burned. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.

[0014] Figure 1 It is a structural schematic diagram of an arc extinguishing chamber structure of the utility model;

[0015] Figure 2 It is a structural schematic diagram of another perspective of the utility model;

[0016] Figure 3It is a schematic diagram of the structure of the arrangement of several arc-extinguishing grids in the utility model;

[0017] Figure 4 This is a structural schematic diagram of the utility model without the mounting plate;

[0018] Figure 5 It is a structural schematic diagram of the mounting plate in the utility model;

[0019] Figure 6 It is a structural schematic diagram of an arc-extinguishing grid in the utility model;

[0020] Figure 7 It is a structural schematic diagram of the fixing plate in the utility model;

[0021] Figure 8 It is a structural schematic diagram of the second guard plate in the utility model;

[0022] In the figure, 1-arc extinguishing grid, 2-first protective plate, 3-second protective plate, 4-arc striking groove, 5-arc striking port, 6-arc entry end, 7-mounting hole, 8-mounting plate, 9-groove, 10-first disassembly and assembly port, 11-first disassembly and assembly plate, 12-fixed plate, 13-fixed end, 14-fixed hole, 15-second disassembly and assembly port, 16-second disassembly and assembly plate, 17-first inclined surface, 18-second inclined surface. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0024] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.

[0025] The directions and positions mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., are only for reference to the directions or positions of the drawings. Therefore, the directions and positions used are used to explain and understand the present invention, but not to limit the scope of protection of the present invention.

[0026] like Figures 1 to 8As shown, an embodiment of the utility model is an arc extinguishing chamber structure, comprising a plurality of arc extinguishing grids 1 arranged at intervals and a first guard plate 2 and a second guard plate 3 respectively arranged on both sides of the arc extinguishing grid 1, the first guard plate 2 and the second guard plate 3 are matched to fix the plurality of arc extinguishing grids 1, each of the arc extinguishing grids 1 is recessed with an arc striking groove 4, the inner side wall of the arc striking groove 4 is inclined, each of the arc extinguishing grids 1 is recessed with at least one arc striking opening 5 at a position corresponding to the inner bottom wall of the arc striking groove 4, the inner wall of the arc striking opening 5 is arranged in an arc shape, and the positions where the plurality of arc striking openings 5 ​​are distributed are arranged in an arc shape relative to the first guard plate 2.

[0027] The beneficial effects of such an arrangement are as follows: the arc extinguishing chamber of the utility model has a plurality of arc extinguishing grids arranged at intervals, each arc extinguishing grid is provided with an arc striking groove and an arc striking port, the inclined arc striking groove on the inner wall and the arc striking port structure of the inner wall can reduce the resistance of the arc entering the arc extinguishing chamber, the arc can be quickly and fully introduced between each arc extinguishing grid, and the arc striking port on each arc extinguishing grid is at a different position, i.e., an arc-shaped arrangement position, when the arc enters the arc extinguishing chamber, it moves along the arc-shaped arc striking port, so that the arc is more easily elongated and divided, thereby improving the arc extinguishing speed and preventing the contacts from being burned.

[0028] It is further provided that the arc-starting openings 5 ​​on the arc-extinguishing grids 1 arranged at the edges of both sides are closer to the first guard plate 2 than the arc-starting openings 5 ​​on the arc-extinguishing grids 1 arranged in the middle.

[0029] The beneficial effects of such a setting are as follows: the arc-shaped arrangement of the arc starting opening is conducive to the arc moving along the arc-extinguishing grid in the middle toward the arc-extinguishing grids on both sides at the same time, further increasing the speed at which the arc is divided into short arcs by the arc-extinguishing grids, resulting in a faster arc extinguishing speed.

[0030] It is further provided that one end of the plurality of arc-extinguishing grids 1 corresponding to the arc-starting opening 5 is an arc-entering end 6 , and the plurality of arc-extinguishing grids 1 are arranged at intervals in an arc shape and shrink toward the arc-entering end 6 .

[0031] The beneficial effects of such a configuration are as follows: the arc extinguishing grids are distributed in an arc shape around the arc entry end, and the end of the arc extinguishing grid away from the arc entry end has a larger interval with the adjacent arc extinguishing grid. After the arc enters the interval between the arc extinguishing grids, the arc is elongated and extinguished faster.

[0032] It is further provided that the first guard plate 2 is provided with a mounting hole 7 for the arc-extinguishing grid 1 to pass through, a mounting plate 8 is embedded in the mounting hole 7, a groove 9 adapted to the mounting plate 8 is provided on one side of each of the arc-extinguishing grids 1, and each of the arc-extinguishing grids 1 is plugged into the mounting hole 7 with the mounting plate 8 through the groove 9.

[0033] The beneficial effects of such a setting are as follows: one end of the arc-extinguishing grid is fixed in the mounting hole of the first protective plate by plugging and cooperating with the mounting plate through the groove. After removing the mounting plate, the arc-extinguishing grid can be removed along the mounting hole, which is convenient for replacing the arc-extinguishing grid separately, speeding up maintenance efficiency and reducing maintenance costs.

[0034] Further, the mounting plate 8 is also in an arc shape adapted to the arrangement position of the arc extinguishing grid 1 , a first disassembly opening 10 is recessed on one side of the mounting hole 7 , and a first disassembly plate 11 extends from one end of the mounting plate 8 into the first disassembly opening 10 .

[0035] The beneficial effects of such a configuration are as follows: the arc-shaped mounting plate is plugged into and matched with the groove of each arc-extinguishing grid when installed, and at the same time the position of each arc-extinguishing grid is adjusted to ensure the spacing between each arc-extinguishing grid and prevent the arc-extinguishing grids from being fitted together. The mounting plate can also be quickly disassembled through the first disassembly plate and the first disassembly port.

[0036] It is further configured that a fixing plate 12 is embedded in the end surface of the second guard plate 3 that contacts the arc-extinguishing grid 1, and each of the arc-extinguishing grids 1 is provided with a fixing end 13 on the side away from the groove 9, and the fixing plate 12 is provided with a fixing hole 14 for the fixing end 13 to be plugged in and matched, and a second disassembly opening 15 is recessed on the second guard plate 3, and a second disassembly plate 16 is extended from one end of the fixing plate 12 toward the second disassembly opening 15.

[0037] The beneficial effects of such a configuration are as follows: the end of the arc-extinguishing grid that contacts the second guard plate is fixed by a fixing plate, and a fixing hole adapted to the fixed end of the arc-extinguishing grid is provided on the fixing plate, thereby limiting the position of each arc-extinguishing grid, and the fixing plate can also be quickly disassembled through the second disassembly plate and the second disassembly port.

[0038] In this embodiment, the first quick release plate and the second quick release plate can be respectively locked on the first guard plate and the second guard plate by fasteners such as bolts, so as to further improve the firmness.

[0039] It is further configured that the first disassembly plate 11 is provided with a first inclined surface 17 toward the interior of the first disassembly port 10, and the end of the second disassembly plate 16 is provided with a second inclined surface 18 toward the interior of the second disassembly port 15, and there are gaps between the first disassembly port 10 and the end of the first disassembly plate 11, and between the second disassembly port 15 and the end of the second disassembly plate 16.

[0040] The beneficial effect of such arrangement is as follows: the gap is convenient for tools or operators to insert bare hands into, and to move the first inclined surface or the second inclined surface to remove the mounting plate and the fixing plate, further facilitating removal.

[0041] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. An arc extinguishing chamber structure, comprising a plurality of arc extinguishing grids (1) arranged at intervals, and a first guard plate (2) and a second guard plate (3) respectively arranged on both sides of the arc extinguishing grids (1), wherein the first guard plate (2) and the second guard plate (3) are matched to fix the plurality of arc extinguishing grids (1), characterized in that: Each of the arc-extinguishing grids (1) is recessed with an arc-striking groove (4), the inner side wall of the arc-striking groove (4) is arranged in an inclined manner, each of the arc-extinguishing grids (1) is recessed with at least one arc-striking opening (5) at a position corresponding to the inner bottom wall of the arc-striking groove (4), the inner wall of the arc-striking opening (5) is arranged in an arc shape, and the positions of the plurality of arc-striking openings (5) are arranged in an arc shape relative to the first guard plate (2).

2. The arc extinguishing chamber structure according to claim 1, characterized in that: The arc-starting openings (5) on the arc-extinguishing grids (1) arranged at the edges of both sides are closer to the first guard plate (2) than the arc-starting openings (5) on the arc-extinguishing grids (1) arranged in the middle.

3. The arc extinguishing chamber structure according to claim 1, characterized in that: One end of the plurality of arc-extinguishing grids (1) corresponding to the arc-starting opening (5) is an arc-entering end (6), and the plurality of arc-extinguishing grids (1) are arranged at intervals in an arc shape and contract toward the arc-entering end (6).

4. The arc extinguishing chamber structure according to claim 3, characterized in that: The first guard plate (2) is provided with a mounting hole (7) for the arc extinguishing grid (1) to pass through, a mounting plate (8) is embedded in the mounting hole (7), a groove (9) matching the mounting plate (8) is provided on one side of each arc extinguishing grid (1), and each arc extinguishing grid (1) is plugged into and fitted with the mounting plate (8) in the mounting hole (7) via the groove (9).

5. The arc extinguishing chamber structure according to claim 4, characterized in that: The mounting plate (8) is also in an arc shape that matches the arrangement position of the arc-extinguishing grid plates (1); a first disassembly opening (10) is recessed on one side of the mounting hole (7); and a first disassembly plate (11) is extended from one end of the mounting plate (8) toward the first disassembly opening (10).

6. An arc extinguishing chamber structure according to claim 5, characterized in that: A fixing plate (12) is embedded in the end surface of the second guard plate (3) in contact with the arc extinguishing grid (1); a fixing end (13) is provided on a side of each arc extinguishing grid (1) away from the groove (9); a fixing hole (14) is provided on the fixing plate (12) for plugging and mating with the fixing end (13); a second disassembly opening (15) is recessed on the second guard plate (3); and a second disassembly plate (16) is extended from one end of the fixing plate (12) toward the inside of the second disassembly opening (15).

7. The arc extinguishing chamber structure according to claim 6, characterized in that: The first disassembly plate (11) is provided with a first inclined surface (17) toward the interior of the first disassembly opening (10), and the end of the second disassembly plate (16) is provided with a second inclined surface (18) toward the interior of the second disassembly opening (15). Gaps are provided between the first disassembly opening (10) and the end of the first disassembly plate (11), and between the second disassembly opening (15) and the end of the second disassembly plate (16).

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