Core rod of insulator and manufacturing method thereof

Abstract

The invention discloses a core rod of an insulator, comprising a hollow rod body and a plurality of partition blocks, wherein the hollow rod body is compounded by ethoxyline resins and glass fibres; the partition blocks are vertically embedded into the hollow rod body in the hollow rod body and can be all in a light disk shape, or the partition blocks close to both ends of the hollow rod body arein a light disk shape, and other partition blocks are in a light disk shape or a shape that both end surfaces of the light disk are provided with bevel teeth. A manufacturing method of the core rod comprises the following steps: (a) manufacturing the partition blocks, i.e. manufacturing the partition blocks according to the requirement of the core rod which needs to be manufactured; (b) manufacturing a base pipe, i.e. manufacturing the base pipe in a squeezing and pulling way; (c) cutting, i.e. cutting the base pipe on a position needing to install the partition blocks; (d) fixing, i.e. placing the partition blocks on the cutting position of the base pipe; (e) thickening, i.e. squeezing and pulling the core rod till the outer diameter of the core rod is equal to that of the code rod whichneeds to be manufactured. Because the plurality of partition blocks are embedded into the hollow rod body, the core rod of the insulator has the simple structures of the partition blocks and also saves materials consumed by a connection structure; and in addition, the technology is simple in a manufacturing method aspect.

Description

technical field [0001] The invention relates to an insulator used in high-voltage electric transmission equipment, more specifically an insulator mandrel and a manufacturing method thereof, belonging to the technical field of electric equipment. Background technique [0002] Insulators are necessary for high-voltage and ultra-high-voltage power transmission lines. At the earliest, there were only porcelain and glass insulators. By the 1970s, high-temperature vulcanized silicone rubber composite insulators were first introduced in Germany. Compared with traditional insulators such as porcelain and glass, It has the advantages of light weight, high strength, strong pollution flashover resistance, convenient maintenance and transportation. In recent years, composite line post insulators have also developed rapidly in our country. [0003] Existing pillar composite insulators are composed of upper and lower metal accessories, core rods and umbrella skirts outside the core rods....

AI Technical Summary

Problems solved by technology

The first is to use epoxy resin glass fiber solid lead rod. Due to the limitation of the existing epoxy resin glass fiber technology, it is difficult for the pillar composite insulator produced with solid mandrel to meet the requirements of the isolation switch pillar with a voltage level above 220kV. Requirements for bending and torsion resistance, and the production cost, transportation and installation costs of the pillar composite insulator produced by the solid mandrel are relatively high

The other is a hollow mandrel, and the mandrel is filled with sulfur hexafluoride gas. The main problem of the post composite insulator produced by this mandrel is that it is often necessary to detect the content of sulfur hexafluoride gas in the mandrel, resulting in Inconvenience in use, and sulfur hexafluoride gas also has a certain impact on the environment

[0005] Although the above-mentioned mandrels overcome some of the shortcomings of traditional insulator mandrels, they mainly have the following three deficiencies. First, the structure of the spacer is complicated (in order to unify the name, the bamboo element is called a spacer) , that is, the spacer has a functional structure perpendicular to the axial direction of the mandrel, and a connecting structure parallel to the axial direction of the mandrel, and the two ends of the connecting structure need to be provided with connectable interfaces; the second is that the consumables are large and the connecting The permanent structure needs to consume a certain amount of spacer materials; the third is that the process is complex, the production of the interface that can be connected at both ends of the connecting structure, and the end-to-end connection after the interface is coated with adhesive all increase the working hours of the operator.

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