High-capacity arc extinguish chamber

Abstract

The utility model relates to a high-capacity arc extinguish chamber, which comprises two flash barriers arranged oppositely and a plurality of grid sheets arranged between the two flash barriers, and the grid sheets are sequentially divided into arcing point grid sheets arranged at the bottom, a stacked grid sheet group positioned on one side of the arcing point grid sheets and a plurality of arc extinguishing grid sheets which are positioned above the stacked grid sheet group and are arranged in a single layer along the arc propagation direction. According to the utility model, the arc starting point grid sheets, the stacked grid sheet group and the arc extinguishing grid sheets arranged in a single layer are sequentially arranged to form a multi-stage arc extinguishing structure, the arc starting point grid sheets firstly bear the impact of an arc, and the arc is dispersed and weakened through the thicker structure and the wider arrangement gap, and then the arc extinguishing point grid sheets are arranged in a multi-stage arc extinguishing manner. The electric arc enters the stacked grid sheet group and the arc extinguishing grid sheet area arranged in a single layer, and the grid sheets are arranged in a staggered manner and designed with bevel edges to further disperse and cool the electric arc, so that the arc extinguishing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of arc extinguishing chambers, in particular to a large-capacity arc extinguishing chamber. Background Art

[0002] In the power system, a large-capacity arc extinguishing chamber is a key component for protecting electrical equipment from arc faults. Traditional arc extinguishing chambers usually use a series of parallelly arranged grid plates to divide and cool the arc, so as to achieve the purpose of arc extinguishing. However, with the continuous increase of the power system capacity, the performance requirements for the arc extinguishing chamber are also getting higher and higher. Summary of the Utility Model

[0003] In view of this, the purpose of the utility model is to provide a large-capacity arc extinguishing chamber with a simple structure and high arc extinguishing efficiency.

[0004] To achieve the above purpose, the utility model adopts such a large-capacity arc extinguishing chamber, which includes two relatively arranged arc separating plates and a plurality of grid plates installed between the two arc separating plates. The grid plates are sequentially divided into starting point grid plates arranged at the bottom, a stacked grid plate group located on one side of the starting point grid plates, and a plurality of single-layer arranged arc extinguishing grid plates located above the stacked grid plate group along the arc propagation direction. Hypotenuses are opened in the middle areas of the grid plates, and the hypotenuses obliquely extend from one side edge of the grid plates to the other side edge, and every two adjacent grid plates are arranged staggeredly left and right.

[0005] The beneficial effects of the above structure are as follows: Through the sequential arrangement of the starting point grid plates, the stacked grid plate group and the single-layer arranged arc extinguishing grid plates, a multi-stage arc extinguishing structure is formed. The starting point grid plates first bear the impact of the arc, and disperse and weaken the arc through their thicker structure and wider arrangement gaps. Subsequently, the arc enters the areas of the stacked grid plate group and the single-layer arranged arc extinguishing grid plates, and these grid plates further disperse and cool the arc through the staggered arrangement and hypotenuse design, thereby improving the arc extinguishing efficiency.

[0006] The utility model is further arranged such that the thickness of the starting point grid plates is greater than the thickness of the stacked grid plate group and the single-layer arranged arc extinguishing grid plates, and the arrangement gaps of the starting point grid plates are wider than the arrangement gaps of the stacked grid plate group and the single-layer arranged arc extinguishing grid plates. As the starting point is the area where the arc is initially generated and concentrated, it will bear a large arc impact and high temperature. Increasing the thickness of the starting point grid plates can make them more solid, with higher heat capacity and mechanical strength, so as to more effectively resist the impact and ablation of the arc, extend the service life of the arc extinguishing chamber, and the wider arrangement gaps of the starting point grid plates can provide a broader dispersion space for the arc, enabling the arc to be better dispersed in the initial stage.

[0007] The present utility model is further configured such that in the uppermost layer of the multiple single-layer arranged arc extinguishing grid plates, at least one guiding arc extinguishing grid plate is included, and one end of the guiding arc extinguishing grid plate is bent upward to form an arc guiding structure. Through the arc guiding structure, the arc can be guided to propagate along a predetermined path, avoiding the disorderly diffusion of the arc in the arc extinguishing chamber. This helps to confine the arc within a smaller area and reduce its damage to the arc extinguishing chamber and surrounding equipment.

[0008] The present utility model is further configured such that tooth blocks are provided on both side edges of the grid plates, and bite tooth holes corresponding to the positions of the tooth blocks are respectively formed on the two arc separating plates. Through the cooperation of the tooth blocks and the bite tooth holes, the connection between the grid plates and the arc separating plates is made more stable.

[0009] The present utility model is further configured such that different numbers of tooth blocks are respectively provided on both side edges of the grid plates, and the numbers of tooth blocks on the same side between two adjacent grid plates are arranged staggeredly. By arranging the numbers of tooth blocks on the same side of adjacent grid plates staggeredly, when the arc propagates between the grid plates, it will be blocked and deflected by different numbers of tooth blocks. This helps to disperse the arc into more small arc segments. The dispersed distribution of the small arc segments makes the arc energy more dispersed, reduces the concentration and intensity of the arc, and thus improves the arc extinguishing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic structural diagram of an embodiment of the present utility model.

[0011] Figure 2 is an exploded view of the grid plate structure of an embodiment of the present utility model.

[0012] Figure 3 is an exploded assembly view of the arc separating plate and the grid plate of an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0013] Such as Figures 1 - 3As shown, an embodiment of the utility model provides a large-capacity arc extinguishing chamber, comprising two arc-isolating plates 1 arranged relatively parallel to each other and twenty-two grids 2 installed between the two arc-isolating plates 1, wherein the grids 2 are sequentially divided into three arc-starting point grids 21 arranged at the bottom, a stacked grid group 22 located on the upper side of the arc-starting point grid 21, and seventeen single-layered arc-extinguishing grids 23 located above the stacked grid group 22, wherein the stacked grid group 22 is formed by stacking two grids 2, and the top layer of the seventeen single-layered arc-extinguishing grids 23 comprises A guide arc extinguishing grid 231, one end of which is bent upward to form an arc guide structure for guiding arc propagation, a bevel 20 is provided in the middle area of ​​all grids 2, the bevel 20 extends obliquely from one side edge of the grid 2 to the other side edge, and every two adjacent grids 2 are arranged alternately left and right, the thickness of the arc starting point grid 21 is greater than the thickness of the stacked grid group 22 and the single-layer arc extinguishing grid 23, and the arrangement gap of the arc starting point grid 21 is wider than the arrangement gap of the stacked grid group 22 and the single-layer arc extinguishing grid 23.

[0014] like Figure 3 As shown, tooth blocks 10 are provided on both side edges of the grid plate 2, and tooth holes 11 corresponding to the positions of the tooth blocks 10 are respectively opened on the two arc isolation plates 1. The tooth blocks 10 and the tooth holes 11 are interference fit so that the grid plate 2 is fixedly connected to the two arc isolation plates 1. The number of tooth blocks 10 on the two side edges of the grid plate 2 is one and two respectively. In order to prevent the arc isolation plates 1 from breaking during the connection process, the number of tooth blocks 10 on the same side between two adjacent grid plates 2 is staggered.

[0015] Of course, in addition to the above-mentioned embodiments, the utility model may also have many other embodiments. Without departing from the essential technical solution content of the utility model, technical personnel familiar with the field may make various corresponding changes and deformations according to the utility model, and these changes or deformations are equivalent to the technical solution in this patent. Then these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the utility model, and the utility model creation is in line with the applicant's actual R&D capabilities and resource conditions.

Claims

1. A large-capacity arc-extinguishing chamber, comprising two arc-isolating plates arranged opposite to each other and a plurality of grids installed between the two arc-isolating plates, characterized in that: The grid plates are divided into an arc starting point grid plate arranged at the bottom, a stacked grid plate group located on one side of the arc starting point grid plate, and a plurality of single-layer arc extinguishing grid plates arranged above the stacked grid plate group in sequence along the arc propagation direction. The middle area of ​​the grid plates is provided with a bevel, and the bevel extends obliquely from one side edge of the grid plate to the other side edge, and every two adjacent grid plates are arranged alternately left and right.

2. The large-capacity arc extinguishing chamber according to claim 1, characterized in that: The thickness of the arc starting point grid is greater than the thickness of the stacked grid group and the arc extinguishing grid arranged in a single layer, and the arrangement gap of the arc starting point grid is wider than the arrangement gap of the stacked grid group and the arc extinguishing grid arranged in a single layer.

3. The large-capacity arc extinguishing chamber according to claim 1 or 2, characterized in that: The uppermost layer of the plurality of arc-extinguishing grids arranged in a single layer includes at least one guide arc-extinguishing grid, and one end of the guide arc-extinguishing grid is bent upward to form an arc guide structure.

4. The large-capacity arc extinguishing chamber according to claim 1 is characterized in that: Tooth blocks are arranged on both side edges of the grid plate, and tooth-biting holes corresponding to the positions of the tooth blocks are respectively opened on the two arc-isolating plates.

5. The large-capacity arc extinguishing chamber according to claim 4 is characterized in that: Different numbers of tooth blocks are respectively arranged on the edges of both sides of the grid plates, and the numbers of tooth blocks on the same side between two adjacent grid plates are staggered.

Images