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Anticorona flange for extra-high voltage post insulator

A pillar insulator, anti-corona technology, applied in the direction of supporting insulators, insulators, circuits, etc., can solve the problems of stress on the porcelain body, poor sealing of the flange, and deterioration of the colloidal layer, and achieves excellent oxidation effect. The effect of ensuring safe use and improving service life

Active Publication Date: 2015-01-21
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Long-term corona discharge will cause the colloidal layer (cement) to loosen, deteriorate, and carbonize, and then the flange mouth will not be sealed tightly, and moisture will penetrate into the flange, resulting in ceramic bodies, adhesives, flanges and other materials with different expansion coefficients. As the ambient temperature changes, the ceramic body is stressed, which eventually leads to damage

Method used

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  • Anticorona flange for extra-high voltage post insulator
  • Anticorona flange for extra-high voltage post insulator
  • Anticorona flange for extra-high voltage post insulator

Examples

Experimental program
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Embodiment 1

[0039] The casing 3 is installed vertically on the base 5, and the inner and outer walls of the end of the casing 3 are filled with a 90° fillet 7, and a reinforcing rib 4 is welded between the casing 3 and the base 5, and the outer wall of the casing 3 is close to its end Position-welded ring-shaped anti-corona member 6, anti-corona member 6 is made of aluminum alloy casting, aluminum alloy by mass percentage is Si: 0.57%, Fe: 0.55%, Cu: 0.36%, Mn: 0.10%, Mg : 0.85%, Cr: 0.12%, Zn: 0.19%, Ti: 0.11%, the balance is Al.

[0040] A bushing 3 is installed at both ends of the porcelain column 1 of the pillar insulator, and a colloidal layer 2 made of cement with the mark P.O52.5 is added between the bushing 3 and the porcelain column 1.

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Abstract

The invention provides an anticorona flange for an extra-high voltage post insulator. The flange is made of steel or aluminum alloy and comprises a base and a sleeve vertically arranged on the base. The sleeve is arranged at the end of a knob insulator of the post insulator, and a rubber layer is arranged between the sleeve and the knob insulator. The anticorona flange is characterized in that an anticorona piece is arranged along the circumference of the outer wall of the end of the sleeve. Compared with the prior art, the anticorona flange for the extra-high voltage post insulator has the advantages that corona produced by the insulator under the extra-high voltage is effectively eliminated, and the safe using of the insulator is guaranteed.

Description

Technical field [0001] The invention relates to a flange used for post insulators, in particular to an anti-corona flange used for UHV post insulators. Background technique [0002] Pillar insulators are insulating pillars that support the busbars of high-voltage power distribution devices and live parts of high-voltage electrical appliances. figure 1 As shown, the porcelain column and upper and lower metal accessories (steel feet, iron caps, flanges, etc.) are assembled by concrete glue. The pillar insulators of outdoor installations adopt a large number of rod-shaped structures-solid round porcelain columns with umbrellas. The flashover distance of the porcelain columns extending the external air gap is almost the same as the internal penetration path. Only external flashover will occur without porcelain. The internal breakdown of the medium is very important to the safe operation of the insulator. The existing post insulators for power transmission and transformation mainly i...

Claims

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Application Information

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IPC IPC(8): H01B17/38H01B17/42H01B17/14
Inventor 赵波金雪芬杨京齐李静
Owner STATE GRID CORP OF CHINA
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