Impregnation method for dry capacitance type high-voltage bushing core

Abstract

The invention relates to an impregnation method for a dry capacitance type high-voltage bushing core. The impregnation method comprises steps as follows: distributed through holes are formed in the wall of a conductive tube, one end of the conductive tube is closed, the conductive tube is wound with an insulating layer, then the insulating layer is wound with a capacitive screen, and alternate winding is performed until the specified layer number of the capacitive screens is reached; a prepared bushing core blank body is arranged in an airtight pouring die, glue with pressure is introduced through an open end of the conductive tube, is enabled to permeate layer by layer to an external wrapping layer through the through holes in the conductive tube and is gradually diffused to all insulating layers and capacitive screens, and an impregnation process of the bushing core is finished after heating and curing forming. According to the impregnation method, diffusion and permeation of the glue can be formed from inside to outside, retention of bubbles is avoided, the qualified rate of products can be increased more than 3 times after impregnation, heating and curing, the impregnation quality is also greatly improved, further, the production cost is reduced, and the economic benefit of a production enterprise can be greatly increased.

Description

Technical field [0001] The invention relates to a manufacturing method of a high-voltage power transmission and transformation component, in particular to a method for dipping a dry capacitor type high-voltage bushing core. Background technique [0002] In order to obtain a more uniform electric field distribution, the main insulation structure of the sleeve core of the dry-type capacitor high-voltage bushing is generally made in two ways: the first method is the glue (resin) paper-impregnated capacitor bushing The main insulation structure of the casing core is made by concentrically winding crepe paper of a certain thickness (2-5mm) along the outer circumference of the conductive tube, using the crepe paper as a support layer, and then stacking and winding concentric conductive foils. Capacitive screen, according to the different voltage levels applicable to high-voltage bushings, several layers of crepe paper and capacitive screen are alternately wound to form the core of the ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for impregnating the core body of a dry capacitor type high voltage bushing to solve the problem that the air bubbles are difficult to be eliminated during the dipping operation of the core body of a dry capacitor type high voltage bushing, resulting in a low product qualification rate.

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