Extra-high voltage rod-shaped composite insulator

Abstract

The invention provides an extra-high voltage rod-shaped composite insulator. The composite insulator comprises the following components in parts by weight: 30-40 parts of vinyl silicone rubber, 20-40 parts of polyketone resin, 15-20 parts of polycarbonate, 5-12 parts of zinc dimethyldithiocarbamate, 10-15 parts of lauryl acrylate, 10-15 parts of an ethylene-vinyl acetate copolymer, 4-6 parts of microcrystalline wax, 1-1.3 parts of polyoxyethylene polyoxypropylene pentaerythritol ether, 2-4 parts of a silane coupling agent, 0.5-1 part of a ketoxime type cross-linking agent, 20-25 parts of three-layer core-shell structure zirconium oxide insulating filler, 5-10 parts of basalt fibers, 0.5-1 part of a plasticizer, 5-8 parts of aluminum hydroxide, 2-5 parts of white carbon black and 1-3 parts of silica powder. According to the invention, a polydopamine bonding layer is introduced between the zirconium oxide core body and the silicon nitride shell layer, the coating density of the silicon nitride shell layer is improved, the insulating property is improved, the advantages of low impurity content, high purity, low conductivity and good insulating property are achieved, the fluidity is good in the preparation process, and the mechanical strength and the insulating property of the insulator can be effectively filled and improved.

Description

technical field [0001] The invention relates to the technical field of insulating materials, in particular to an ultra-high voltage rod-shaped composite insulator. Background technique [0002] With the widespread use of electricity by humans, the application of electricity is becoming more and more extensive, and the requirements for insulators required in the process of electricity transmission are becoming higher and stricter. [0003] As a special insulation control, insulators can be installed between conductors with different potentials or between conductors and grounding components to withstand voltage and mechanical stress. There are many types of insulators in different shapes. Although the structure and shape of different types of insulators are quite different, they are mainly composed of two parts: insulating parts and connecting fittings. [0004] Insulators were mostly used for utility poles in the early years, and gradually developed in high-voltage wire con...

AI Technical Summary

Problems solved by technology

In traditional high-quartz porcelain insulators, microcracks caused by internal quartz / cristobalite particles cause the insulator under load to lose strength due to crack growth, resulting in harmful stress and excessive expansion coefficient, poor insulation effect, and certain dangers Alumina ceramics are more stable than quartz ceramics. High-alumina ceramics have good mechanical properties and good insulation breakdown strength, which can better meet the current high-voltage transmission needs, but alumina ceramics and high-alumina ceramics There are still some limitations when transporting

Images