Vacuum glue-dipping insulation pipe without air gaps and manufacturing method thereof

Abstract

The invention discloses a vacuum glue-dipping insulation pipe without air gaps and a manufacturing method thereof, relates to an insulation pipe and a manufacturing method thereof, and solves the problems of poor electrical property and mechanical property of the insulation pipe caused by air bubbles, gaps and local layering produced easily among layers of glass fabrics in the prior manufacturing process of the insulation pipe. The insulation pipe is formed by winding the glass fabrics, resin glue is dipped in the glass fabrics, and the resin glue is prepared by stirring the following components in portion by weight at the temperature of between 50 and 80 DEG C: 100 portions of modified epoxy resin, 85 portions of curing agent, 10 portions of toughening agent and 3 portions of accelerating agent. The method comprises the following steps: first, designing a core die; second, winding the glass fabrics; third, glue dipping; fourth, primary curing; five, demoulding; six, secondary curing; and seven, removing burrs to obtain the vacuum glue-dipping insulation pipe without the air gaps. The insulation pipe is formed by glue dipping under a vacuum state, and the air bubbles, the gaps and the local layering are not produced among layers of the glass fabrics, so the electrical property and the mechanical property of the insulation pipe are improved.

Description

technical field [0001] The invention relates to an insulating pipe and a manufacturing method. Background technique [0002] With the rapid increase of power grid capacity, high-voltage electrical equipment is required to have large-capacity and miniaturized performance. Dry-type transformers are safe, reliable, energy-saving, fire-proof, explosion-proof, do not produce harmful gases, do not pollute the environment, and are easy to maintain. It is widely used in large-capacity and miniaturized high-voltage electrical equipment; the insulating tube (barrel) of the basic component in the dry-type transformer is required to have high electrical strength and mechanical strength, otherwise, it cannot be used in a high-voltage electric field. The existing manufacturing method of the insulating tube (tube) is to apply glue on the top and bottom of the glass cloth, and then roll the glued glass cloth on the mandrel on a special pipe rolling machine, heat and pressurize while rolling...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that air bubbles, gaps, and local delamination are easily generated between layers of glass cloth during the manufacturing process of the existing insulating tube, resulting in poor electrical and mechanical properties of the insulating tube, and to provide a non-air gap Vacuum dipped insulating pipe and manufacturing method