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New arc extinguishing grid and its arc extinguishing chamber

A technology of arc extinguishing grids and arc extinguishing chambers, which is applied to circuit breaker components, electrical components, electric switches, etc., to achieve the effects of increasing heat capacity, increasing the facing surface area, and cooling the arc effect

Active Publication Date: 2020-10-16
CHANGSHU SWITCHGEAR MFG CO LTD (FORMER CHANGSHU SWITCHGEAR PLANT)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

like figure 2 In the traditional arc extinguishing grid shown, without changing the structure of the electric field, magnetic field, and flow field in the arc extinguishing chamber, in order to improve the breaking capacity of the arc extinguishing chamber, it is necessary to increase the number of grids and the space of the arc extinguishing chamber. However, as the market demand for low-voltage circuit breakers is increasingly miniaturized and the breaking capacity is increasing, the above-mentioned traditional strategy of increasing the arc voltage is becoming increasingly difficult to cope with

Method used

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  • New arc extinguishing grid and its arc extinguishing chamber
  • New arc extinguishing grid and its arc extinguishing chamber
  • New arc extinguishing grid and its arc extinguishing chamber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment one: see image 3 and Figure 4 As shown, an arc extinguishing grid 1 and its arc extinguishing chamber:

[0028] see image 3 , the arc extinguishing grid 1 is a layer of sheet-like body, roughly in the shape of "concave", consisting of two symmetrical legs 12 of the grid and the connection between the legs 12 of the grid, and the depth area of ​​the connection is provided with There is a cutting arc part 11, which is used to cut the arc into several short arcs during the movement, so that the cutting short arcs of multiple new arc extinguishing grids 1 are connected in series to achieve the purpose of arc extinguishing. The cutting arc portion 11 is provided with at least one curved portion 111 in the width direction, and the curved portion 111 is concave or convex, and the concave or convex axis is parallel to the direction of arc movement, and the axis is as follows: image 3 The concave or convex centerline A indicated in . Preferably, a concave curv...

Embodiment 2

[0034] Embodiment two: see Figure 5 , Figure 6 and Figure 7 Shown:

[0035] An arc extinguishing grid 1 and its arc extinguishing chamber are different from Embodiment 1 in that: see Figure 5 , Figure 6 , the grid legs 12 of the arc extinguishing grid 1 only include mounting ears 122 , and grid legs 121 are not provided. Others are the same as those in Embodiment 1, and will not be repeated here.

Embodiment 3

[0036] Embodiment three: see Figure 8-Figure 9 Shown:

[0037] An arc extinguishing grid 1 and its arc extinguishing chamber, the difference from Embodiment 1 is that the arc extinguishing chamber further includes an insulating support 5, which is arranged on the arc extinguishing grid 1 perpendicular to At one end in the other direction of the width direction of the arc extinguishing grid 1 , the insulating support 5 provides support for the end of each arc extinguishing grid 1 . Specifically, if Figure 8As shown, the insulating support 5 is provided with a slot 51 corresponding to each arc extinguishing grid 1, so that the insulating support 5 presents a comb shape, and the trend of the slot 51 in the width direction of the arc extinguishing grid 1 is similar to that of the arc extinguishing grid. The trend of the surface of 1 is the same, for example, the end of the arc extinguishing grid 1 is flat, the trend of the slot 51 is also a straight line, and if the end of the...

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PUM

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Abstract

The invention relates to a novel arc chute plate and an arc extinguishing chamber therefor. The arc chute plate is shaped like a sheet, and is provided with a cutting arc part. The arc chute plate ischaracterized in that the cutting arc part is provided with at least one bent part in a width direction, wherein the bent part is concave or convex, and the axis of the bent part is parallel to the moving direction of an arc. According to the invention, the upper edge of the cutting arc part is provided with at least one concave or convex bent part in the width direction, thereby enabling the spread length of the arc chute plate to be increased, and increasing the opposite surface area of the adjacent arc chute plates, i.e., improving the quality of arc chute plate. The arc chute plate can bear more arc energy, i.e., increasing the thermal capacity, thereby obtaining a better arc cooling effect which is better than the arc cooling effect of a conventional flat-shaped arc chute plate, and finally improving the breaking capability of the arc extinguishing chamber.

Description

technical field [0001] The invention relates to the technical field of low-voltage electrical appliances, in particular to a novel arc extinguishing grid and an arc extinguishing chamber. Background technique [0002] The role of low-voltage circuit breakers in distribution lines is to break and connect circuits. When there is an abnormal fault in the line, such as a short circuit, the contact pair is separated to quickly break the line to avoid equipment damage. As is well known in the industry, when the contacts are separated under current-carrying conditions, an arc will be generated, especially when breaking a short circuit with a large current, the energy of the arc is large, and the ablation of the contacts is serious. Therefore, in low-voltage circuit breakers, usually Set up a metal grid arc extinguishing chamber to extinguish the arc to ensure the safety of electrical equipment. Such as figure 1 As shown, after the arc enters the grid, it will be divided into man...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H73/18H01H9/36
CPCH01H9/362H01H73/18
Inventor 陈会林刘洪武瞿帅强
Owner CHANGSHU SWITCHGEAR MFG CO LTD (FORMER CHANGSHU SWITCHGEAR PLANT)