Method for manufacturing variable-diameter conical composite insulator core pipe

Abstract

The invention discloses a method for manufacturing a variable-diameter conical composite insulator core pipe. A reinforcing material adopts equal-diameter glass fiber two-dimensional weaving sleeves. The method comprises the following steps of: according to the size of a composite insulator core pipe product, selecting the equal-diameter glass fiber two-dimensional weaving sleeves of corresponding specification, and cutting into the glass fiber two-dimensional weaving sleeves with the length which corresponds to the size of the composite insulator core pipe product; sleeving the weaving sleeves on a variable-diameter conical core mold, which is treated by a mold release agent, in a layered mode; applying tension to both ends of the weaving sleeves to make the weaving sleeves tensioned andtightly sleeved on the mold; sleeving the next layer of the weaving sleeve in the same mode, and controlling the number of layers of the weaving sleeves until the thickness is equal to the thickness of the product; by using a vacuum auxiliary dipping resin method, digging the glass fiber sleeves on the mold by resin; and curing, de-molding, cutting two ends to be flush with each other, and smoothly grinding the two ends to obtain the variable-diameter conical composite insulator core pipe. The variable-diameter conical composite insulator core pipe which is prepared by using the method is high in strength and uniform in wall thickness; secondary processing is not required; and production efficiency is improved.

Description

technical field [0001] The invention relates to a manufacturing method of a variable-diameter conical high-voltage composite insulator core tube used in the electric power industry. Background technique [0002] Power transmission and transformation equipment needs to use a large number of insulators. The insulators have various shapes, including straight shapes with equal diameters, tapered shapes with variable diameters, and waist drum shapes. They are made of ceramics, glass or composite materials. Among them, the composite insulator is light in weight and simple in forming process, and has been more and more widely used. Composite insulator core tubes or rods can be prepared in various ways. Generally, small-diameter composite tubes or rods are usually prepared by pultrusion, while large-diameter composite core tubes are mostly prepared by winding technology. In order to meet different application requirements, the composite material core tube or rod can also be prepare...

AI Technical Summary

Problems solved by technology

[0003] The pultrusion process is suitable for the preparation of equal-diameter composite insulator core rods, but it cannot be used to prepare variable-diameter tapered composite insulator core rods; the variable-diameter composite insulator core tubes prepared by winding technology usually have uneven wall thickness and must be processed to obtain such Thick composite material core tube will not only reduce its mechanical properties, but also cause waste of materials

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