Multi-grid air-blowing structure arc extinguish chamber

Abstract

The utility model relates to an arc extinguish chamber, in particular to a multi-grid-sheet air-blowing structure arc extinguish chamber, which comprises a plurality of grid sheet structures which are assembled between two arc isolating sheets and form an arc extinguish area, and each grid sheet structure comprises a first grid sheet group, a second grid sheet group and a third grid sheet group which are sequentially arranged into an L-shaped structure through a straight section, a corner section and a straight section, according to the utility model, the arc extinguish chamber is provided with an L-shaped grid sheet arrangement, so that more grid sheets can be placed in a limited space of the arc extinguish chamber, the arc voltage of the arc extinguish chamber can be improved, the arc can be cooled, and an ideal arc extinguish effect can be achieved; in addition, the gas generating cover is added, when the surface of the gas generating cover is heated by the electric arc, gas is generated, the electric arc is cooled, and the electric arc is pushed to be discharged to the narrow slit of the grid sheet structure and the gas outlet of the product for cooling, and the gas generating cover has the advantages of being simple in structure, convenient to machine, easy to assemble and high in practicability.

Description

Technical Field

[0001] The utility model relates to an arc extinguishing chamber, in particular to an arc extinguishing chamber with a multi-grid gas-blowing structure. Background Art

[0002] Ordinary circuit breakers are equipped with an arc extinguishing chamber, in which grids are arranged. Most of the grids are 12 in number and surround the movable radius of the moving contact. This is also the case with the publication number CN218975378U, which is called "A low-voltage circuit breaker arc extinguishing chamber". The layout of the grids is very unreasonable, which makes it difficult to increase the number of grids, thus affecting the arc extinguishing effect. How to optimize the structure of the grids is a technical problem that we need to solve now. Utility Model Content

[0003] In view of the deficiencies in the existing technology, the utility model provides an arc extinguishing chamber with a multi-grid gas-blown structure.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a multi-grid gas-blowing structure arc extinguishing chamber, characterized in that it includes a plurality of grid structures assembled between two arc-isolating plates and forming an arc-extinguishing area, the grid structure includes a first grid group, a second grid group and a third grid group arranged into an L-shaped structure through a straight section, a corner section and a straight section in sequence, and a gas-generating hood for gas blowing is provided at the arc-extinguishing area and relative to the front of the grid, and the number of the gas-generating hoods is two and they are fixedly assembled on the two arc-isolating plates respectively.

[0005] The second grid plate group is arranged along an arc path.

[0006] The first grid plate group includes a plurality of first grid plates arranged in a straight section, the first grid plates are provided with a first channel for reciprocating motion of the moving contact, the first grid plates are provided with a first inclined block protruding into the first channel at a position relative to the first channel, the first inclined block has an inclination angle from one end to the other end of the first channel, and the inclination directions of adjacent first inclined blocks are opposite.

[0007] The second grid plate group includes a plurality of second grid plates arranged in a corner section, the second grid plates are provided with a second channel for reciprocating motion of the moving contact, the second grid plates are provided with a second inclined block protruding into the second channel at a position relative to the second channel, the second inclined block has an inclination angle from one end to the other end of the second channel, and the inclination directions of adjacent second inclined blocks are opposite.

[0008] The third grid plate group includes a plurality of third grid plates and fourth grid plates arranged in a straight section. The third grid plates and the fourth grid plates are arranged adjacent to each other. The third grid plates and the fourth grid plates are provided with a third channel for reciprocating movement of the moving contact. A stopper protruding into the third channel is provided on the third grid plate and relative to the third channel.

[0009] The number of the grid structure is 34.

[0010] A limiting groove for limiting the grid structure is provided on a side of the gas generating hood opposite to the arc isolation plate.

[0011] The gas generating hood is fixed on the arc isolation plate by screw fastening.

[0012] The gas generating hood is provided with a positioning column, the arc isolation sheet is provided with a positioning hole matching the positioning column, and the gas generating hood and the arc isolation sheet are limited by inserting the positioning column into the positioning hole.

[0013] The gas generating hood is made of plastic.

[0014] The beneficial effects of the utility model are as follows: the utility model sets an L-shaped grid arrangement at the arc extinguishing chamber, which can place more grids in the limited arc extinguishing chamber space, thereby increasing the arc voltage of the arc extinguishing chamber, cooling the arc, and achieving an ideal arc extinguishing effect. In addition, a gas generating hood is added to generate gas when the arc heats the surface of the gas generating hood, cool the arc, and push the arc to the narrow gap of the grid structure and to the product outlet for discharge and cooling. The utility model also has the characteristics of simple structure, easy processing and easy assembly, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a structural exploded diagram of the utility model;

[0017] Figure 3 It is a cross-sectional view of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the first grid plate group of the utility model;

[0019] Figure 5 It is a structural schematic diagram of the second grid plate group of the utility model;

[0020] Figure 6 It is a structural schematic diagram of the third grid plate group of the utility model;

[0021] Figure 7 It is a structural schematic diagram of the gas generating hood of the utility model. DETAILED DESCRIPTION

[0022] like Figure 1-Figure 7As shown, a multi-grid gas-blowing structure arc extinguishing chamber includes a plurality of grid structures 200 assembled between two arc-isolating plates 100 and forming an arc-extinguishing area. The grid structure 200 includes a first grid group 210, a second grid group 220 and a third grid group 230 which are arranged in an L-shaped structure through a straight section, a corner section and a straight section in sequence. A gas-generating hood 300 for gas blowing is provided at the arc-extinguishing area and relative to the front of the grid. The number of the gas-generating hoods 300 is two and they are fixedly assembled on the two arc-isolating plates 100 respectively. The third grid group 230 corresponds to the position when the moving contact is closed, and the corresponding first grid group 210 is the farthest distance between the moving contact and the closing switch. The addition of the gas-generating hood 300 can generate gas when the arc heats the surface of the gas-generating hood 300, cool the arc and push the arc to the narrow gap of the grid structure and to the product outlet for discharge and cooling.

[0023] The second grid plate group 220 is arranged along an arc path, and the arc path can perfectly cope with the transition of the moving contact here, and the arc extinguishing effect is better.

[0024] The first grid plate group 210 includes a plurality of first grid plates 211 arranged in a straight section. The first grid plates 211 are provided with a first channel 212 for reciprocating motion of a moving contact (not shown in the figure). The first grid plates 211 are provided with a first inclined block 213 protruding into the first channel 212 at a position relative to the first channel 212. The first inclined block 213 has an inclination angle from one end to the other end of the first channel 212. The inclination directions of adjacent first inclined blocks 213 are opposite. The first inclined blocks 213 of adjacent first grid plates 211 are symmetrically arranged, which lengthens the arc trajectory and improves the arc extinguishing effect.

[0025] The second grid plate group 220 includes a plurality of second grid plates 221 arranged in a corner section, a second channel 222 for reciprocating motion of a moving contact is provided on the second grid plate 221, a second inclined block 223 protruding into the second channel 222 is provided on the second grid plate 221 and at a position relative to the second channel 222, the second inclined block 223 has an inclination angle from one end to the other end of the second channel 222, the inclination directions of adjacent second inclined blocks 223 are opposite, and the second inclined blocks 223 of adjacent second grid plates 221 are symmetrically arranged, thereby lengthening the arc trajectory and achieving a better arc extinguishing effect.

[0026] The third grid piece group 230 includes a plurality of third grid pieces 231 and a fourth grid piece 232 arranged in a straight section. The third grid piece 231 and the fourth grid piece 232 are arranged adjacent to each other. A third channel 233 for reciprocating movement of the moving contact is provided on the third grid piece 231 and the fourth grid piece 232. A stopper 234 protruding into the third channel 233 is provided on the third grid piece 231 and at a position relative to the third channel 233. The stopper 234 is only provided on the third grid piece 231. The stopper 234 partially intercepts the third channel 233 laterally. The cooperation between the third grid piece 231 and the fourth grid piece 232 forms a height difference at the third channel 233. The third grid piece group 230 as a whole forms a path form similar to a wave line, further lengthens the arc trajectory, and enhances the arc extinguishing effect.

[0027] The number of the grid structure 200 is 34, and the number of the grid structure 200 is preferably 34, taking both the manufacturing cost and the arc extinguishing effect into consideration.

[0028] A limiting groove 310 for limiting the grid structure 200 is provided on the gas generating hood 300 on one side opposite to the arc isolation plate 100 . There are a plurality of limiting grooves 310 for separating adjacent grid structures 200 .

[0029] The gas generating hood 300 is fixed on the arc isolation plate 100 by screw fastening, and the gas generating hood 300 can be fixed on the arc isolation plate 100 by self-tapping screws.

[0030] The gas generating hood 300 is provided with a positioning post 320, and the arc isolation plate 100 is provided with a positioning hole 110 that cooperates with the positioning post 320. The gas generating hood 300 and the arc isolation plate 100 are limited by inserting the positioning post 320 into the positioning hole 110. The addition of the positioning hole 110 and the positioning post 320 plays a positioning role during the installation process, which is highly practical.

[0031] The gas generating hood 300 is made of plastic material, and nylon synthetic material is recommended for better protection effect.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, simple changes and substitutions by ordinary technicians in this field are within the protection scope of the utility model.

Claims

1. A multi-grid gas-blown arc extinguishing chamber, characterized in that: The invention comprises a plurality of grid plate structures (200) which are assembled between two arc isolation plates (100) and form an arc extinguishing region. The grid plate structure (200) comprises a first grid plate group (210), a second grid plate group (220) and a third grid plate group (230) which are sequentially arranged into an L-shaped structure through a straight section, a corner section and a straight section. A gas generating hood (300) for gas blowing is provided at the arc extinguishing region and relative to the front of the grid plate. The number of the gas generating hoods (300) is two and they are respectively fixedly assembled on the two arc isolation plates (100).

2. A multi-grid gas-blown arc extinguishing chamber according to claim 1, characterized in that: The second grid plate group (220) is arranged along an arc path.

3. A multi-grid gas-blown arc extinguishing chamber as claimed in claim 2, characterized in that: The first grid plate group (210) comprises a plurality of first grid plates (211) arranged in a straight section, a first channel (212) for reciprocating movement of a movable contact is provided on the first grid plate (211), a first inclined block (213) protruding into the first channel (212) is provided on the first grid plate (211) and at a position relative to the first channel (212), the first inclined block (213) having an inclination angle from one end to the other end of the first channel (212), and adjacent first inclined blocks (213) have opposite inclination directions.

4. A multi-grid gas-blown arc extinguishing chamber as claimed in claim 3, characterized in that: The second grid plate group (220) comprises a plurality of second grid plates (221) arranged in a corner section, the second grid plates (221) being provided with a second channel (222) for reciprocating motion of the movable contact, the second grid plates (221) being provided with a second inclined block (223) protruding into the second channel (222) at a position relative to the second channel (222), the second inclined block (223) having an inclined angle from one end to the other end of the second channel (222), and the inclined directions of adjacent second inclined blocks (223) being opposite.

5. The multi-grid gas-blown arc extinguishing chamber according to claim 1, characterized in that: The third grid plate group (230) comprises a plurality of third grid plates (231) and fourth grid plates (232) arranged in straight sections. The third grid plates (231) and the fourth grid plates (232) are arranged adjacent to each other. A third channel (233) for reciprocating movement of the moving contact is provided on the third grid plates (231) and the fourth grid plates (232). A stopper (234) protruding into the third channel (233) is provided on the third grid plate (231) and at a position relative to the third channel (233).

6. A multi-grid gas-blown arc extinguishing chamber as claimed in claim 1, characterized in that: The number of the grid structure (200) is 34.

7. A multi-grid gas-blown arc extinguishing chamber according to any one of claims 1 to 6, characterized in that: A limiting groove (310) for limiting the grid structure (200) is provided on a surface of the gas generating hood (300) opposite to the arc isolation plate (100).

8. A multi-grid gas-blown arc extinguishing chamber as claimed in claim 7, characterized in that: The gas generating hood (300) is fixed on the arc isolation plate (100) by means of screw fastening.

9. A multi-grid gas-blown arc extinguishing chamber as claimed in claim 8, characterized in that: The gas generating hood (300) is provided with a positioning column (320), and the arc isolation plate (100) is provided with a positioning hole (110) matching the positioning column (320). The gas generating hood (300) and the arc isolation plate (100) are limited by inserting the positioning column (320) into the positioning hole (110).

10. The multi-grid gas-blown arc extinguishing chamber according to claim 7, characterized in that: The gas generating hood (300) is made of plastic.

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