Arc extinguish chamber of switch

Abstract

An arc extinguish chamber of a switch belongs to the technical field of low-voltage apparatuses. The arc extinguish chamber comprises a pair of side walls, a plurality of grid sheets and a gas generating part, wherein the plurality of grid sheets are arranged between the pair of side walls; the grid plate comprises an arc extinguishing part, and two sides of the arc extinguishing part extend downwards to form a pair of grid plate legs; a pair of gas generating pieces are also arranged, and the pair of gas generating pieces and the pair of side walls are installed in a matched mode and then wrap the grid piece legs of the grid pieces, and the arc extinguishing structure is characterized in that a construction notch and a positioning notch are formed in the lower edge of the arc extinguishing part and located between the pair of grid piece legs; the gas generating piece comprises a wall part, a positioning protrusion is arranged on the upper edge of the wall part, and the positioning protrusion is embedded into the positioning notch of the grid piece on the corresponding side. The gas generating part has the advantages that the gas generating part has a better positioning effect, the electric arc can be quickly extinguished, and the operation safety of electrical equipment is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of low-voltage electrical appliances, and in particular relates to an arc extinguishing chamber of a switch. Background Art

[0002] A switch is a very important electrical appliance in a power supply and distribution circuit. It can cut off the current it carries to disconnect the circuit and protect the circuit and electrical equipment. A switch usually includes a contact system, which includes a moving contact and a stationary contact. After the moving contact is actuated, it contacts or separates from the stationary contact, thereby enabling the switch itself to be turned on or off. As is known in the industry, when the switch is disconnected, an arc will be generated between the moving contact and the stationary contact. Since the energy of the arc is relatively large, it causes great difficulties in disconnecting the switch. In view of this, the switch usually also includes an arc extinguishing chamber, which is used to extinguish the arc generated when the moving contact is separated from the stationary contact. Only when the arc is extinguished can the circuit be disconnected.

[0003] With the development of the new energy industry, switches need to cope with more and more DC working environments. Since the arc is difficult to extinguish when the current does not exceed zero, the switch will not be able to disconnect the circuit at this time. Even if the arc is not extinguished quickly, it may cause safety accidents. This is also a core problem that troubles many technicians in this field. The arc extinguishing chamber usually also includes a gas-generating part, which is used to consume the arc energy. How to better set the gas-generating part is also a problem of concern to ordinary technicians in this field. Utility Model Content

[0004] The utility model aims to provide an arc extinguishing chamber of a switch, which has two notches on the grid and a positioning protrusion on the upper edge of the gas producing part. The positioning protrusion is inserted into one of the notches of the corresponding side grid to provide a better positioning effect for the upper edge of the gas producing part.

[0005] The purpose of the utility model is achieved in this way. An arc extinguishing chamber of a switch comprises an arc extinguishing chamber including a pair of side walls, a plurality of grids and a gas producing part, wherein the plurality of grids are arranged in an array and are located between the pair of side walls; the grid comprises an arc extinguishing portion, and a pair of grid legs extend downwardly on both sides of the arc extinguishing portion; the gas producing part is also a pair, and the pair of gas producing parts and the pair of side walls are cooperated and installed to cover the grid legs of the plurality of grids, and a structural notch and a positioning notch are provided at the lower edge of the arc extinguishing portion and between the pair of grid legs; the gas producing part comprises a wall portion, and a positioning protrusion is provided on the upper edge of the wall portion, and the positioning protrusion is embedded in the positioning notch of the corresponding side grid.

[0006] In a specific embodiment of the present invention, the structural notches on adjacent grid sheets are arranged in a staggered manner, and the positioning notches on adjacent grid sheets are respectively arranged on both sides.

[0007] In another specific embodiment of the utility model, the arc extinguishing chamber also includes a first pin shaft, and a pair of the grid legs are provided with a pin connection hole. When the gas producing part and the side wall are installed and fixed in place, the first pin shaft passes through the pin connection hole to pin the grid and the gas producing part.

[0008] In another specific embodiment of the present invention, the grid plates are in multiple groups, and the grid plates in the multiple groups are distributed in a stepped manner, and the grid plates in the middle protrude below the arc extinguishing chamber.

[0009] In another specific embodiment of the present invention, the gas producing part further includes a partition portion and a surrounding portion, the surrounding portion surrounds the wall portion and extends toward the corresponding side wall, and the partition portion extends from the wall portion toward the corresponding side wall.

[0010] In another specific embodiment of the present invention, the upper end of the partition portion has an oblique wedge-shaped protrusion end, and the oblique wedge-shaped protrusion end is embedded between the arc extinguishing portions of adjacent grid plates.

[0011] In a further specific embodiment of the utility model, a male buckle portion is provided on the enclosure portion located on the front and rear sides in the direction of the grid array; a cofferdam portion extending toward the interior of the arc extinguishing chamber is provided on the outer edge of the side wall, wherein female buckle portions are provided on the cofferdam portions at both ends in the direction of the grid array, and the female buckle portions are buckled together with the male buckle portions.

[0012] In a further specific embodiment of the present invention, a mounting groove is provided on the outer side of the upper portion of the side wall, and the mounting groove is in an oblique shape.

[0013] In a further specific embodiment of the present invention, a rib is provided on the inner side of the side wall, and a plurality of the ribs are arranged at intervals. The ribs are spliced ​​with the partition plate portion and are located between adjacent grid sheets.

[0014] The utility model adopts the above structure and has the beneficial effects: two notches are provided at the lower edge of the arc extinguishing part of the grid and between a pair of grid legs, respectively a structural notch and a positioning notch, and a positioning protrusion is provided on the upper edge of the wall of the gas producing part, the positioning protrusion is embedded in the positioning notch of the corresponding side grid to play a supporting and positioning role, the arrangement of the above structure enables the upper edge of the gas producing part to have a better positioning effect, which is conducive to the rapid extinguishing of the arc and ensures the safety of the operation of the electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the arc extinguishing chamber structure involved in the utility model;

[0016] Figure 2 This is an exploded view of the arc extinguishing chamber involved in the utility model;

[0017] Figure 3 A schematic diagram of a grid piece involved in the utility model;

[0018] Figure 4 It is a schematic diagram of one side of the gas producing component involved in the utility model;

[0019] Figure 5 It is a schematic diagram of the other side of the gas producing component involved in the utility model;

[0020] Figure 6 It is a schematic diagram of one side of the side wall involved in the utility model;

[0021] Figure 7 This is another structural schematic diagram of the arc extinguishing chamber involved in the utility model.

[0022] In the figure: 1. side wall, 11. mounting groove, 12. female buckle part, 13. rib; 2. grid, 21. arc extinguishing part, 211. structural notch, 212. positioning notch, 22. grid leg, 221. pin hole; 3. gas producing part, 31. wall part, 311. positioning protrusion, 32. partition part, 321. oblique wedge-shaped protrusion end, 33. enclosure part, 331. male buckle part; 4. arc-starting piece; 5. magnetizing block; 6. bracket, 61. hook; 7. orifice plate, 71. hanging hole; 100. first pin shaft; 200. second pin shaft; 300. bottom gas producing part, 301. extension part; 400. slot hole. DETAILED DESCRIPTION

[0023] The specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings, but the description of the embodiments is not a limitation of the technical solution. Any changes in form rather than substance based on the concept of the present invention should be regarded as the protection scope of the present invention.

[0024] In the following description, all concepts related to directionality (or orientation) such as up, down, left, right, front and back are referring to the position state of the figure being described, and are intended to facilitate public understanding. Therefore, they should not be understood as special limitations on the technical solutions provided by the present utility model.

[0025] like Figure 1 , is a schematic diagram of an arc extinguishing chamber. The circuit breaker includes a contact system and an arc extinguishing chamber, and the arc extinguishing chamber is located in the opening direction of the contact system. The arc extinguishing chamber is used to extinguish the arc generated on the contact system.

[0026] The arc extinguishing chamber includes a pair of side walls 1, grids 2 and gas-generating parts 3. There are multiple grids 2, which are arranged in an array between the pair of side walls 1. The gas-generating parts 3 are also a pair, and the pair of gas-generating parts 3 and the pair of side walls 1 are installed in cooperation, that is, the gas-generating parts 3 on the left are installed in cooperation with the side wall 1 on the left, and the gas-generating parts 3 on the right are installed in cooperation with the side wall 1 on the right. The pair of gas-generating parts 3 and the pair of side walls 1 are installed in cooperation to cover the legs of the multiple grids 2.

[0027] like Figure 2 , which is an exploded view of the arc extinguishing chamber. The grid plates 2 are multiple groups, and the multiple groups of grid plates 2 are distributed in a stepped manner, and the grid plates 2 in the middle protrude below the arc extinguishing chamber, while the two sides thereof are in a step-like shape. This structural setting enables the arc to gradually contact the grid plates, preventing the arc voltage from rising too quickly and breaking down outside the grid plates 2.

[0028] An arc-starting plate 4 is also provided at one end of the grid plate 2 of the array, and the arc-starting plate 4 extends downwardly toward the arc-extinguishing chamber.

[0029] The arc extinguishing chamber further includes a magnetizing block 5, which is located between a pair of the gas producing parts 3. Specifically, a receiving cavity for receiving the magnetizing block 5 is provided on one gas producing part 3, and the magnetizing block 5 is placed therein. When a pair of gas producing parts 3 are installed in place, the other gas producing part 3 can close the receiving cavity, thereby ensuring the installation and positioning of the magnetizing block 5.

[0030] The arc extinguishing chamber further comprises a first pin shaft 100. When the gas generating part 3 and the side wall 1 are installed and fixed in place, the first pin shaft 100 pins the grid 2 and the gas generating part 3. The gas generating part 3 and the side wall 1 are fixed by buckles. Thus, the three are fixed to form a component.

[0031] Since the grid pieces 2 are of different lengths, for the long grid piece in the middle, the arc extinguishing chamber further includes a second pin shaft 200, which is pinned between the long grid piece and the gas producing part 3. That is, the long grid piece is pinned to the gas producing part 3 through the first pin shaft 100 and the second pin shaft 200.

[0032] like Figure 3 Schematic diagram of a grid sheet 2. Although there are many types of grid sheets 2, their shapes are similar and will not be described one by one. A person skilled in the art can clearly understand the structures of other grid sheets 2 through the description of one grid sheet 2.

[0033] The grid plate 2 includes an arc extinguishing portion 21, and a pair of grid plate legs 22 extend downwardly on both sides of the arc extinguishing portion 21. The arc extinguishing portion 21 and the pair of grid plate legs 22 form an arch shape. A pair of the grid plate legs 22 are provided with a pinning hole 221, and the pinning hole 221 is used for the first pin shaft 100 to pass through, or is called for pinning the first pin shaft 100. For the middle long grid plate, each grid plate leg 22 is provided with two pinning holes 221, which are used for pinning the first pin shaft 100 and the second pin shaft 200, respectively.

[0034] A structural notch 211 and a positioning notch 212 are provided at the lower edge of the arc extinguishing portion 21 and between a pair of grid legs 22, wherein the structural notch 211 is used to pull the arc, that is, since the structural notches 211 of adjacent grids 2 are staggered, when the arc contacts the arc extinguishing portion 21, the staggered structural notches 211 can pull the arc in the horizontal direction, which is more conducive to the arc extinguishing. There is only one positioning notch 212, which is located on one side of the structural notch 211 and corresponds to the gas generating part 3.

[0035] Since there is only one positioning notch 212, the positioning notches 212 on adjacent grid sheets 2 are respectively placed on both sides, wherein the positioning notch 212 on the left side cooperates with the gas producing part 3 on the left side, and the positioning notch 212 on the right side cooperates with the gas producing part 3 on the right side. More specifically, the grid sheets 2 are multiple groups, and the positioning notches 212 between adjacent grid sheets 3 in each group are divided into two sides, that is, the positioning notch 212 of one adjacent grid sheet 2 is located on the left side, and the positioning notch 212 of another grid sheet 2 is located on the right side.

[0036] like Figure 4 , Figure 5 , is a schematic diagram of the gas producing part 3. The gas producing part 3 is a pair, wherein the gas producing part 3 on the left is installed in cooperation with the side wall 1 on the left and covers the grid leg 22 on the left side of the grid plate 2, and the gas producing part 3 on the right is installed in cooperation with the side wall 1 on the right and covers the grid leg 22 on the right side of the grid plate 2.

[0037] The gas generating member 3 includes a wall portion 31, a partition portion 32 and a surrounding portion 33. The surrounding portion 33 surrounds the wall portion 31 and extends toward the corresponding side wall 1. The partition portion 32 extends from the wall portion 31 toward the corresponding side wall 1.

[0038] When the installation is completed, the wall portions 31 on a pair of the gas producing parts 3 are arranged opposite to each other at intervals, thereby forming a narrow gap. Preferably, the gas producing parts 3 are made of gas producing materials, which is conducive to the extinguishing of the arc.

[0039] There are a plurality of partition plates 32 in a plate shape, and the partition plates 32 are inserted between adjacent grid plates 2 .

[0040] More specifically, a positioning protrusion 311 is provided on the upper edge of the wall portion 31, and the positioning protrusion 311 is embedded in the positioning notch 212 to achieve the positioning match between the two. Preferably, the positioning protrusion 311 is in the shape of a square column, which can be a rectangular square column or a square square column. Correspondingly, the positioning notch 212 is a square notch, and the shapes of the two match. Of course, when the positioning protrusion 311 and the positioning notch 212 correspond in shape, their shapes can be changed, the positioning notch 212 is a semicircular notch, and the positioning protrusion 311 is a semicircular protrusion. The applicant should also clarify that the shape matching does not mean that the shapes of the two are completely consistent. As long as they can be embedded to achieve the positioning effect, they are all in the category of shape matching.

[0041] The upper end of the partition part 32 has an oblique protrusion end 321. In this embodiment, the oblique protrusion end 321 is triangular, or triangular oblique. The oblique protrusion end 321 is spliced ​​with the rib on the side wall 1. The oblique protrusion end 321 is embedded between adjacent arc extinguishing parts 21, and the other parts of the partition part 32 are embedded between adjacent grid legs 22.

[0042] The enclosure 33 located at the front and rear sides of the grid 2 in the array direction is provided with a male buckle 331, which is used to buckle with the matching structure on the side wall 1. The enclosure 33 is a three-sided structure corresponding to the front and rear sides and the bottom of the arc extinguishing chamber.

[0043] like Figure 6 , is a schematic diagram of the side wall 1. The side wall 1 is a pair and is located on both sides of the arc extinguishing chamber. The side wall 1 is made of insulating material, usually made of thermosetting material to improve its structural strength. An installation groove 11 is provided on the outer side of the upper part of the side wall 1. The installation groove 11 is in an oblique shape, which is convenient for insertion and matching with the circuit breaker housing. Preferably, the installation groove 11 is a two-stage slope.

[0044] A cofferdam portion extending toward the interior of the arc extinguishing chamber is provided on the outer edge of the side wall 1, wherein female buckle portions 12 are provided on the cofferdam portions at both ends in the array direction of the grid plate 2, and the female buckle portions 12 are snap-fitted with the male buckle portions 331 to achieve a fixed installation relationship between the gas-producing component 3 and the side wall 1.

[0045] A rib 13 is provided on the inner side of the side wall 1, that is, on the side facing the grid sheet 2. The ribs 13 are arranged in a plurality of intervals, and each rib 13 is inserted between the grid sheets 2. In this embodiment, the ribs 13 are spliced ​​with the partition plate 32 and are located between adjacent grid sheets 2.

[0046] like Figure 7, which is another arc extinguishing chamber. A grid sheet 2 is arrayed between a pair of side walls 1, and a bracket 6 is provided between the pair of side walls 1 and above the grid sheet 2, and a perforated plate 7 is provided on the bracket 6. The bracket 6 is provided with spaced fences, and the gaps of the fences do not correspond to the gaps between the grid sheets 2. A hanging hole 71 is provided on one end of the perforated plate 7, and a hook 61 is provided at a corresponding position of the bracket 6. When the perforated plate 7 slides onto the bracket 6 along the groove, the hook 61 is hooked with the hanging hole 71.

[0047] A bottom gas producing member 300 is installed below the arc extinguishing chamber. The bottom gas producing member 300 is a pair, which is installed on a pair of side walls 1 respectively and wraps the grid leg of the grid 2. An extension portion 301 is provided below the bottom gas producing member 300, and the extension portion 301 is inserted into the slot 400 below the side wall 1. The extension portion 301 protrudes from the bottom edge below the side wall 1.

Claims

1. An arc extinguishing chamber of a switch, the arc extinguishing chamber comprising a pair of side walls (1), a plurality of grid plates (2) and a gas generating member (3), wherein the plurality of grid plates (2) are arranged in an array and are located between the pair of side walls (1); the grid plates (2) comprise an arc extinguishing portion (21), and a pair of grid plate legs (22) extend downwardly from both sides of the arc extinguishing portion (21); the gas generating member (3) is also a pair, and the pair of gas generating members (3) and the pair of side walls (1) are mounted in cooperation to cover the grid plate legs (22) of the plurality of grid plates (2), characterized in that: A structural notch (211) and a positioning notch (212) are provided at the lower edge of the arc extinguishing portion (21) and between a pair of grid plate legs (22); the gas producing part (3) comprises a wall portion (31), a positioning protrusion (311) is provided on the upper edge of the wall portion (31), and the positioning protrusion (311) is embedded in the positioning notch (212) of the corresponding side grid plate (2).

2. The arc extinguishing chamber of a switch according to claim 1, characterized in that: The structural notches (211) on adjacent grid sheets (2) are arranged in a staggered manner, and the positioning notches (212) on adjacent grid sheets (2) are respectively arranged on both sides.

3. The arc extinguishing chamber of a switch according to claim 1, characterized in that: The arc extinguishing chamber also includes a first pin shaft (100), and a pair of the grid legs (22) are provided with a pin connection hole (221). When the gas producing part (3) and the side wall (1) are installed and fixed in place, the first pin shaft (100) passes through the pin connection hole (221) to pin the grid (2) and the gas producing part (3).

4. The arc extinguishing chamber of a switch according to claim 1, characterized in that: The grid plates (2) are multiple groups, and the multiple groups of grid plates (2) are distributed in a stepped manner, and the grid plates (2) in the middle protrude below the arc extinguishing chamber.

5. The arc extinguishing chamber of a switch according to claim 1, characterized in that: The gas generating part (3) further comprises a partition portion (32) and a surrounding portion (33), wherein the surrounding portion (33) surrounds the wall portion (31) and extends toward the side wall (1) corresponding thereto, and the partition portion (32) extends from the wall portion (31) toward the side wall (1) corresponding thereto.

6. The arc extinguishing chamber of a switch according to claim 5, characterized in that: The upper end of the partition portion (32) has an oblique wedge-shaped protruding end (321), and the oblique wedge-shaped protruding end (321) is embedded between the arc extinguishing portions (21) of adjacent grid plates (2).

7. The arc extinguishing chamber of a switch according to claim 5, characterized in that: A male buckle portion (331) is provided on the enclosure portion (33) located at the front and rear sides in the array direction of the grid plates (2); a cofferdam portion extending toward the interior of the arc extinguishing chamber is provided on the outer edge of the side wall (1), wherein female buckle portions (12) are provided on the cofferdam portions at both ends in the array direction of the grid plates (2), and the female buckle portions (12) are buckled with the male buckle portions (331).

8. The arc extinguishing chamber of a switch according to claim 1, characterized in that: An installation groove (11) is provided on the outer side of the upper portion of the side wall (1), and the installation groove (11) is in an oblique shape.

9. The arc extinguishing chamber of a switch according to claim 5, characterized in that: A rib (13) is provided on the inner side of the side wall (1), wherein a plurality of ribs (13) are arranged at intervals, and the ribs (13) are spliced ​​with the partition plate portion (32) and are located between adjacent grid sheets (2).

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