A kind of glaze for ultra-high voltage porcelain insulator and its making method

Abstract

The invention provides a formula and a preparation method of a glaze for UHV porcelain insulators. The formula includes the following raw materials in parts by weight: 20-33 parts of quartz, 10-18 parts of illite, 10-15 parts of mountain clay, silicon 10-15 parts of zirconium acid powder, 4-7 parts of white corundum powder, 1-5 parts of nano-silica, 3-6 parts of wollastonite, 1-2 parts of barium carbonate, 7-12 parts of levodolite, manganese oxide 5-7 parts, 1-2 parts of iron oxide, 1-2 parts of chromium oxide, 3-5 parts of antimony oxide, 2-8 parts of sepiolite powder, 2-8 parts of bentonite. The preparation method comprises the steps of preparing nano silicon dioxide composite modified sepiolite powder, preparing solid solution, wet ball milling and adjusting the specific gravity of glaze slurry. The glaze obtained by the formula and method of the invention makes the insulator have very excellent pollution resistance and voltage equalization performance, and the mechanical performance and electrical performance are also greatly improved, which is suitable for the UHV direct current transmission system.

Description

technical field [0001] The invention relates to the technical field of electric porcelain insulators, in particular to a glaze used for ultra-high voltage porcelain insulators and a manufacturing method thereof. Background technique [0002] my country's UHV DC transmission projects are becoming increasingly large, and the safety and reliability of its equipment is very important. The use of insulators in the UHV DC transmission system is very large, which largely determines the insulation level of the transmission system and determines the safety and reliability of the transmission system. Therefore, it is necessary to vigorously study the material structure, electrical properties, mechanical properties, long-term operation reliability of insulators, and the production capabilities of various insulator manufacturers. [0003] The anti-fouling measures of traditional porcelain insulators with regular power outages and cleaning are heavy workload and high cost, which are far...

AI Technical Summary

Problems solved by technology

For example, the patent No. 201310439668.1 "Preparation Method for ±1120kV UHV DC Rod Porcelain Insulators", a large amount of potassium feldspar is used in the glaze formula, which is a ridge raw material, which is not conducive to its uniform distribution in the mud, resulting in glaze The mechanical, electrical, and thermal properties of the material cannot be fully utilized; after the glazing, firing, and glue mounting are completed, a layer of PRTV coating should be sprayed on the surface of the insulator to improve the pollution resistance of the insulator

However, there are also defects such as easy aging, breakdown, low rigidity, and poor weather resistance. For areas with strong sandstorms and strong winds, it is difficult to ensure long-term reliable operation of the power grid

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