Method for improving flashover performance of vacuum edge surface of polymer insulator

A technology of surface flashover and insulator, applied in insulators, electrical components, circuits, etc., can solve the problem of no one involved, and achieve the effect of less influencing factors, high reliability and mild reaction conditions

Active Publication Date: 2013-09-04
NORTHWEST INST OF NUCLEAR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are very few reports on the use of gas fluorination technology to improve the insulation performance of polymers, and the use of gas fluorination technology to improve the flashover performance of polymers in vacuum has not been involved.

Method used

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  • Method for improving flashover performance of vacuum edge surface of polymer insulator
  • Method for improving flashover performance of vacuum edge surface of polymer insulator
  • Method for improving flashover performance of vacuum edge surface of polymer insulator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) At room temperature 25°C, put polystyrene insulators into a closed reactor, and then evacuate the reactor to a pressure of less than 10 -2 Pa;

[0024] 2) Fill the reactor with 1.0 atm of fluorine / nitrogen mixed gas, in which the volume concentration of fluorine is 20%;

[0025] 3) Control the temperature of the reactor to 50°C, and the reaction time is 2h;

[0026] 4) After the reaction, use nitrogen to purge the fluorine-containing mixed gas in the reaction chamber into the lye absorption tower for tail gas treatment;

[0027] 5) Take out the polystyrene insulator after cooling the reactor to room temperature.

Embodiment 2

[0029] 1) At room temperature, put the high-density polyethylene insulator into a closed reactor, and then vacuumize the reactor to a pressure of less than 10 -2 Pa;

[0030] 2) Fill the reactor with 2 atm chlorine trifluoride / nitrogen mixed gas, wherein the volume concentration of chlorine trifluoride gas is 5%;

[0031] 3) Carry out the reaction at room temperature (18°C), and the reaction time is 24h;

[0032] 4) After the reaction, use nitrogen to purge the fluorine-containing mixed gas in the reaction chamber into the lye absorption tower for tail gas treatment;

[0033] 5) Open the reactor and take out the polyethylene insulator.

Embodiment 3

[0035] 1) At room temperature, put polyamide (nylon) insulators into a closed reactor, and then vacuumize the reactor to a pressure of less than 10 -2 Pa;

[0036] 2) Fill the reactor with 0.1atm xenon difluoride gas;

[0037] 3) The reaction is carried out at 100°C, and the reaction time is 0.5h;

[0038] 4) After the reaction, use nitrogen to purge the xenon difluoride gas in the reaction chamber into the lye absorption tower for tail gas treatment;

[0039] 5) Open the reactor and take out the nylon insulator.

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Abstract

The invention belongs to the technical field of high-voltage electrical insulating material, and particularly relates to an effective method for improving the flashover performance of a vacuum edge surface of a polymer insulator. The method comprises the step of enabling the polymer insulator to be contacted with fluorine-containing gas with a certain proportion at a certain temperature for generating fluoridation to form a fluoride layer with a certain thickness on the surface of the polymer. The method has the characteristics that the fluoride layer is formed on the surface of the polymer such as polyethylene, polypropylene, nylon and the like by the fluoridation of the gas, so that the flashover performance of the vacuum edge surface of the insulator can be improved, the surface breakdown voltage of the insulator is increased, and the insulating strength of the surface of the fluorizated insulator is 1.2-1.6 times higher than that of the non-fluorizated insulator.

Description

technical field [0001] The invention belongs to the field of electrical high-voltage insulating materials, and in particular relates to a method for improving the vacuum surface flashover performance of high molecular polymer insulators. Background technique [0002] An insulator is a component used for electrical insulation and mechanical fixing. Its function is to connect conductors with different potentials to each other mechanically and to insulate them electrically. With the development of science and technology, the surface flashover phenomenon of insulators has become a prominent problem in vacuum electrical equipment. Surface flashover makes the withstand voltage capacity of insulators far lower than its bulk breakdown voltage, and is much lower than that of vacuum at the same distance. gap. With the increasingly prominent role of high-power pulse technology in national economy and national defense construction, many large-scale cutting-edge equipment, such as high-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B19/04
Inventor 刘文元柯昌凤段荔陈昌华宋玮汤俊平薛西民
Owner NORTHWEST INST OF NUCLEAR TECH
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