Arc extinguishing chamber
By using high-temperature resistant plastic covers and bayonet structures to fix the metal grid, the problems of inconvenient assembly and poor consistency of existing arc extinguishing covers are solved, and a simpler assembly process and higher product consistency are achieved.
Patent Information
- Application Number
- CN202420920643.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-04-29
AI Technical Summary
The arc-extinguishing covers of existing small circuit breakers are inconvenient to assemble and have poor product consistency, so they need to bend and press the metal grid to fix the red-gang cardboard.
High temperature resistant plastic is used as the cover material, and the metal grid is fixed through an integrated molding design and bayonet structure to achieve a fixed connection with the cover.
Simplifies the assembly process, avoids additional bending operations, and improves product positioning accuracy and consistency.
Smart Images
Figure CN222801640U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an accessory for a small circuit breaker, in particular to an arc extinguishing cover. Background Art
[0002] Small circuit breakers use arc extinguishing hoods to extinguish arcs generated when moving contacts and static contacts are disconnected. The arc is stretched by the arc extinguishing hood, and the arc is naturally cooled in the air until it is extinguished. Existing arc extinguishing hoods are usually composed of metal grids and red cardboard. Multiple arc extinguishing grids are fixed in the red cardboard. When the red cardboard is fixed to the metal grid, it must be bent and pressed to be fixedly connected with the metal grid, which is inconvenient to assemble and has poor product consistency. Summary of the invention
[0003] In view of the above-mentioned deficiencies, the utility model provides an arc extinguishing cover which adopts high temperature resistant plastic to fix the metal grid.
[0004] In order to achieve the above purpose, the utility model adopts an arc extinguishing cover, including a cover shell and arc extinguishing grids, the cover shell includes an integrally formed bottom surface and side walls connected on both sides of the bottom surface, the bottom surface and the side walls are perpendicular to each other, and a plurality of bayonet holes are correspondingly formed on the side walls on both sides, a plurality of arc extinguishing grids are arranged in the cover shell, an arc striking port is formed in front of the arc extinguishing grid, protruding blocks are formed on both sides of the arc extinguishing grid, the blocks on both sides of the arc extinguishing grid are clamped in the bayonet holes to achieve fixed connection with the cover shell, an arc discharge port is formed on the bottom surface of the cover shell, the arc discharge port is correspondingly arranged between the arc extinguishing grids, adjacent arc discharge ports are staggered, a protruding positioning block is arranged between the arc extinguishing grids at the center of the bottom surface, and the positioning block limits the rear side of the arc extinguishing grid.
[0005] The utility model is further configured that the arc extinguishing grid comprises a long grid and a short grid, the front end length of the long grid is longer than that of the short grid, and the long grid and the short grid are alternately arranged in the cover shell.
[0006] The utility model is further configured that the number of the arc-extinguishing grids is 11, and the outermost grid of the 11 arc-extinguishing grids is a long grid.
[0007] The utility model is further configured that there are 17 arc-extinguishing grids, the outermost of the 17 arc-extinguishing grids in the housing is a long grid, and the arc discharge openings of the long grid and the short grid have different internal directions.
[0008] The beneficial effects of the utility model are that the cover shell is formed in one step by high temperature resistant plastic and has a positioning block, which can reliably position the arc extinguishing grid, does not require additional bending during assembly, is easy to assemble, and has accurate and reliable positioning. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a schematic diagram of specific embodiment 1 of the utility model.
[0010] Figure 2 It is an exploded view of specific embodiment 1 of the utility model.
[0011] Figure 3 It is a schematic diagram of specific embodiment 2 of the utility model.
[0012] Figure 4 It is an exploded view of specific embodiment 2 of the utility model. DETAILED DESCRIPTION
[0013] like Figure 1 , Figure 2 As shown, a specific embodiment 1 of the utility model is an arc extinguishing cover, comprising a cover shell 1 and arc extinguishing grids 2, wherein the cover shell 1 comprises an integrally formed bottom surface 11 and side walls 12 connected to both sides of the bottom surface 11, the bottom surface 11 and the side walls 12 are perpendicular to each other, and a plurality of bayonet holes 13 are correspondingly formed on the side walls 12 on both sides, and a plurality of arc extinguishing grids 2 are arranged in the cover shell 1, an arc striking port 21 is formed in front of the arc extinguishing grid 2, and protruding clamping blocks 22 are formed on both sides of the arc extinguishing grid 2, and the clamping blocks 22 on both sides of the arc extinguishing grid 2 are clamped in the clamping holes 13 to realize fixed connection with the cover shell 1, an arc discharge port 14 is formed on the bottom surface 11 of the cover shell 1, and the arc discharge port 14 is correspondingly arranged between the arc extinguishing grids 2, and adjacent arc discharge ports 14 are staggered, and a protruding positioning block 15 is arranged between the arc extinguishing grids 2 at the center of the bottom surface 11, and the positioning block 15 limits the rear side of the arc extinguishing grid 2. There are 11 arc-extinguishing grids 2, including long grids 24 and short grids 25. The front end length of the long grids 24 is longer than that of the short grids 25. The long grids 24 and the short grids 25 are alternately arranged in the cover 1, and the outermost of the 11 arc-extinguishing grids 2 in the cover 1 is the long grid 24.
[0014] like Figure 3 , Figure 4 As shown, a specific embodiment 2 of the utility model is an arc extinguishing cover, comprising a cover shell 1 and arc extinguishing grids 2, wherein the arc extinguishing grids 2 have 17 pieces, and the outermost of the 17 arc extinguishing grids 2 in the cover shell 1 is a long grid 24, and the arc discharge openings 14 of the long grids 24 and the short grids 25 have different internal directions.
[0015] The preferred embodiments of the present invention in the above specific embodiments and other obvious changes are also within the protection scope of the claims.
Claims
1. An arc extinguishing hood, characterized in that: The arc extinguishing cover includes a cover shell and arc extinguishing grids. The cover shell is molded in one step with high-temperature resistant plastic. The cover shell includes an integrally molded bottom surface and side walls connected to both sides of the bottom surface. The bottom surface and the side walls are perpendicular to each other. A plurality of bayonet holes are correspondingly formed on the side walls on both sides. A plurality of arc extinguishing grids are arranged in the cover shell. An arc striking port is formed in front of the arc extinguishing grid. Protruding blocks are formed on both sides of the arc extinguishing grid. The blocks on both sides of the arc extinguishing grid are clamped in the bayonet holes to achieve fixed connection with the cover shell. An arc discharge port is formed on the bottom surface of the cover shell. The arc discharge port is correspondingly arranged between the arc extinguishing grids. Adjacent arc discharge ports are staggered. A protruding positioning block is arranged between the arc extinguishing grids at the center of the bottom surface. The positioning block limits the rear side of the arc extinguishing grid.
2. The arc extinguishing hood according to claim 1, characterized in that: The arc-extinguishing grids include long grids and short grids. The front end of the long grid is longer than that of the short grid. The long grids and the short grids are alternately arranged in the housing.
3. The arc extinguishing hood according to claim 2, characterized in that: There are 11 arc-extinguishing grids, and the outermost grids of the 11 arc-extinguishing grids are long grids.
4. The arc extinguishing hood according to claim 2, characterized in that: There are 17 arc-extinguishing grids, and the outermost of the 17 arc-extinguishing grids in the housing is a long grid, and the arc discharge openings of the long grid and the short grid have different internal directions.