Glass fiber impregnating resin wound-type composite insulator core and preparing method

Abstract

The invention relates to a spiral-wound composite insulator bar for high-voltage transmission line in electric network and method for making same. The spiral-wound composite insulator bar has metal rings inlayed in its two ends. On the external diameter of metal rings wounded filaments, which are bound with, resinate glass fiber. The method comprises the steps of: getting some compound; melting resin; mixing melted glass fiber with resin solution and stirring with 150 turns per minute; enwinding continuously and modeling the glass fiber and epoxy resin radical solution in high temperature. The invention has the advantage of simple structure and low cost, of reducing tower's load and the effective distance from current transmission line to the earth. The spiral-wound composite insulator bar with cross wrap can meet the requirement of tensile strength, increasing bending strength.

Description

technical field

[0001] The invention relates to an insulator mandrel for a power grid transmission line, and is especially suitable for a resin-based winding composite insulator mandrel impregnated with glass fiber and a preparation method thereof Background technique

[0002] The existing insulator mandrels used in the transmission lines of high-voltage power grids at home and abroad are extruded and pultruded by epoxy resin-based impregnated glass fibers. The connection between the extruded mandrel and the fittings adopts the crimping process. In order to ensure that the mandrel and the metal sleeve are firmly connected to prevent falling off and to ensure the safe operation of the power grid, the crimping part of the metal sleeve is generally designed to be very long, so as to ensure the connection. Safety. However, there are insulators above 500KV. Due to the large volume of the metal sleeve, firstly, the steel increases the production cost, secondly, it increases the l...

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