Shielding ring structure at sharp corner of transformer opening

A technology for shielding rings and transformers, which is applied in the direction of preventing/reducing unwanted electric/magnetic influences, and can solve the problems of enlarged distance, increased manufacturing cost of transformers, and increased inner cavity size of transformers, so as to reduce inner cavity size, The effect of easy installation and reasonable structural design

Inactive Publication Date: 2021-10-08
常州西电变压器有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to ensure a sufficient insulation distance between these openings and the inner coils and leads of the transformer, and to prevent discharge or even breakdown of the insulating medium at the sharp corners of these openings, it is necessary to enlarge the distance and increase the size of the inner cavity of the transformer, resulting in an increase in the manufacturing cost of the transformer.

Method used

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  • Shielding ring structure at sharp corner of transformer opening
  • Shielding ring structure at sharp corner of transformer opening
  • Shielding ring structure at sharp corner of transformer opening

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Embodiment approach

[0034] see figure 1 and Figure 4 As shown, the present invention provides a shielding ring structure at the sharp corner of the transformer opening, which includes a shielding ring 1 and two fixing plates 2 symmetrically welded on both sides of the shielding ring.

[0035] The section of the shielding ring 1 is a semi-circular structure, so that the surface facing the lead wire and the coil is a circular ring, the surface is smooth, and the shape of the electrode is good.

[0036] The shielding ring 1 can be designed into rings of different shapes and sizes according to different openings; the shielding ring 1 is integrally stamped from a 2mm aluminum plate, and the fixing plate 2 is a 2mm thick aluminum fixing plate, which is welded on the upper and lower sides of the shielding ring 1. Mounting holes 20 are provided on the fixing plate 2 .

[0037] see Figure 5 and Image 6 As shown, the installation structure of the shielding ring 1 is introduced in detail by taking th...

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Abstract

The invention belongs to the technical field of shielding, and discloses a shielding ring structure at a sharp corner of a transformer opening, which comprises a shielding ring with a semicircular cross section for covering a transformer opening sharp corner, and a fixing plate arranged on the side edge of the shielding ring. After the shielding ring structure at the transformer opening sharp corner is installed, the shielding ring is tightly attached to the opening of a shielded body, the sharp corner at the opening is effectively shielded, the safe insulation distance from the opening body to a coil and a lead is reduced, and therefore the size of an inner cavity of the transformer is reduced, and the manufacturing cost is reduced.

Description

technical field [0001] The invention belongs to the field of shielding technology, in particular to a shielding ring structure at the sharp corner of a transformer opening. Background technique [0002] As an important part of the power system, the transformer plays an important role in the transmission and transformation of the power system. During the design and manufacture of transformers, for reasons such as oil flow and installation of transformer accessories, openings are required in many places, such as openings in the transformer oil tank wall, clamp openings, and magnetic shielding openings on the tank wall. These openings will form sharp corners. Some openings cannot be chamfered due to material and other reasons. Even if some openings can be chamfered, in high-voltage transformers, the electric field strength is high, and the chamfering can no longer guarantee a safe insulation distance. . Especially now that the voltage level of the power grid is getting higher...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/36
CPCH01F27/36
Inventor 李子兴吴国良范学文
Owner 常州西电变压器有限责任公司
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