CN202230812U - Shielding ring - Google Patents

Abstract

The utility model discloses a shielding ring. The body of the shielding ring has two short edges and two long edges. Each short edge and each long edge, both of which are adjacent to each other, are arranged in an arc transition manner. One end of each long edge is folded with a certain angle. The body is also provided with a mounting sheet. The shielding ring helps to solve a problem about corona discharge of a 24kv grounding switch.

Description

Shading ring

Technical field

The utility model belongs to the high voltage switchgear field, relates in particular to a kind of shading ring.

Background technology

At present, the most of producer that produces the 12kV earthed switch of China, the processing technology comparative maturity, experience is rich also, in actual motion, also seldom owing to corona discharge has an accident.Therefore, a lot of producers only with the amplification simple in structure of 12kv, do not have to consider because the problem that the rising Electric Field Distribution of working voltage changes when the earthed switch of design 24kv.In addition, even because the earthed switch that is installed in the switch cubicle produces corona discharge, but also can bear certain withstand voltage level, manufactory often can't find the corona discharge phenomenon at the power frequency withstand test of the inspection of dispatching from the factory.Therefore, less than the enough attention of manufactory, also make this problem not be well solved for a long time.

Summary of the invention

The purpose of the utility model is that a kind of shading ring that can solve the corona discharge problem of 24kv earthed switch will be provided.

The utility model realizes that the technical scheme of above-mentioned purpose is; A kind of shading ring, its innovative point is: body has two minor faces and two long limits, is arc transition between said adjacent minor face and the long limit; And an end on long limit is the angle bending, also has installation sheet on the said body.

The utility model adopts body to have two minor faces and two long limits, be arc transition between said adjacent minor face and the long limit, and an end on long limit is the angle bending; Also have the such structure of installation sheet on the said body, change the shape of electrode, increase the radius of curvature of electrode as far as possible; Improve the distribution of electric field, increase average field-strength, effectively improve the puncture voltage of air gap; Thereby alleviate or avoid the generation of corona discharge phenomenon, significantly improve the industrial frequency withstand voltage level of earthed switch.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the right view of Fig. 1;

Fig. 3 is the user mode figure of Fig. 1

Fig. 4 is the left view of Fig. 3.

Embodiment

Below in conjunction with accompanying drawing the utility model is done and to be described in further detail.

Shown in Fig. 1～2, a kind of shading ring, body 1 have two minor face 1-1 and two long limit 1-2, be arc transition between said adjacent minor face and the long limit, and an end of growing the limit is the angle bending, also have installation sheet 1-3 on the said body.

Like Fig. 3, shown in 4, on the fixed contact of earthed switch, add a shading ring, change the shape of electrode; Increase the radius of curvature of electrode as far as possible, improve the distribution of electric field, increase average field-strength; Effectively improve the puncture voltage of air gap, thereby alleviate or avoid the generation of corona discharge phenomenon.Shading ring is by the round steel bending forming, and vulcanizing treatment is made on the surface, and sulfuric horizon thickness is greater than 2mm.Require weld smooth as far as possible, avoid existing phenomenons such as burr, corner angle, and make bright and clean as far as possible, the no shrinkage cavity core in shading ring surface.

Claims (1)

1. shading ring, it is characterized in that: body has two minor faces and two long limits, be arc transition between said adjacent minor face and the long limit, and an end of growing the limit is the angle bending, also has installation sheet on the said body.

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