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Preparation method of electrical insulation material for inhibiting reduction of flashover voltage

A technology of electrical insulating materials and flashover voltage, applied in the direction of organic insulators, plastic/resin/wax insulators, etc., can solve the problems of high surface resistivity and low surface electric strength, and achieve low surface resistivity and high surface electric strength , easy-to-operate effect

Active Publication Date: 2019-08-09
HARBIN INST OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the technical problems of high surface resistivity and low surface electric strength of existing electrical insulating materials, and provides a preparation method of electrical insulating materials that suppresses flashover voltage reduction

Method used

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  • Preparation method of electrical insulation material for inhibiting reduction of flashover voltage
  • Preparation method of electrical insulation material for inhibiting reduction of flashover voltage
  • Preparation method of electrical insulation material for inhibiting reduction of flashover voltage

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specific Embodiment approach 1

[0033] Embodiment 1: In this embodiment, a method for preparing an electrical insulating material that suppresses the reduction in flashover voltage is specifically carried out in the following steps:

[0034] 1. TiO 2 Heat the particles to 90-100°C and keep for 30-50min, heat the epoxy resin to 80-90°C and keep for 2-3h, heat the curing agent to 80-90°C and keep for 2-3h;

[0035] 2. Mix the epoxy resin processed in step 1 with the curing agent, add diluent, stir evenly, and then add the TiO treated in step 1 2 Granules, stirred evenly to obtain a mixed solution;

[0036] 3. Coat the surface of the mold with a layer of release agent, put it in an oven, control the temperature at 50-60°C, preheat it for 2-3 hours, then pour the mixed solution obtained in step 2, and then control the temperature at 50-60°C , keep warm for 30-50min, put it into a vacuum drying oven, and evacuate until there are no air bubbles on the surface of the mixed liquid; then raise the temperature to 90...

specific Embodiment approach 2

[0037] Embodiment 2: This embodiment is different from Embodiment 1 in that the epoxy resin in step 1 is bisphenol A type epoxy resin. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0038] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the curing agent in step 1 is methyltetrahydrophthalic anhydride. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a preparation method of an electrical insulation material for inhibiting reduction of flashover voltage, relates to the field of preparation of electrical insulation materials,and aims at solving the technical problems of high surface resistivity and low surface electrical strength of an existing electrical insulation material. The method comprises the steps that firstly, TiO2 nano-particles, epoxy resin and a curing agent are pretreated, the epoxy resin and the curing agent are mixed, then a diluting agent is added, mechanical stirring is carried out, TiO2 is added forstirring, a mixed solution is poured into a preheated mould coated with a layer of release agent, heat preservation is carried out, vacuumizing and curing are carried out, and the electrical insulation material can be obtained. The preparation method of the electrical insulation material for inhibiting the reduction of the flashover voltage has the advantages that bisphenol-A epoxy resin is takenas a matrix, and through the modification of semiconductor TiO2 nano-particles, the novel TiO2 modified epoxide resin compound electrical insulation material with low surface resistivity and high surface electrical strength is obtained. The prepared electrical insulation material is applied to ultrahigh voltage or extra-high voltage products.

Description

technical field [0001] The invention relates to the field of preparation methods of electrical insulating materials. Background technique [0002] As my country's energy strategy moves westward, the scale of energy transmission is getting larger and larger. On the basis of traditional transportation methods such as railways, highways, shipping, and pipelines, improving the transmission capacity of the power grid is an option to ease transportation pressure. However, its transmission distance is as long as 2000-3000 kilometers. Therefore, there is an urgent need for long-distance, large-capacity and low-loss power transmission technology. Compared with AC transmission, HVDC transmission is used in long-distance (greater than 600km) large-capacity transmission technology due to its strong transmission capacity, low line loss, no need for synchronous operation of AC on both sides, and low failure loss. Insulation technology is an important part of DC power transmission and tra...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08K3/22C08G59/42H01B3/40
CPCC08K3/22C08G59/4238H01B3/40C08K2003/2241C08K2201/011C08L63/00
Inventor 韩喜江赵红红郝留成杜耘辰王亚祥
Owner HARBIN INST OF TECH
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