Aging evaluation method of single-component RTV coating based on environmental factors

Abstract

The invention discloses an aging evaluation method of a single-component RTV coating based on environmental factors. The aging evaluation method comprises the following steps: S100, cleaning a to-be-detected similar insulator coated with the RTV coating, and then, carrying out shady, cool and drying; S200, evaluating a plurality of environmental factors of the position of the insulator to be detected, dividing each environmental factor into three classes according to the severity, and when the plurality of environmental factors are classified into one class, classifying the environmental typesof the insulator into the same class; S300, performing performance test on the RTV coating on the surface of the insulator according to the insulator classification result, and S400, comprehensivelyjudging whether the RTV coating on the surface of the insulator to be detected is aged according to the performance test result corresponding to each type of insulator. According to the method, the aging condition of the single-component RTV coating is comprehensively evaluated by using a plurality of parameters, so that the method has important significance for evaluating whether the RTV coatingon the surface of the insulator can be continuously used and ensuring safe and stable operation of power equipment.

Description

technical field [0001] The invention belongs to the field of insulating coatings, in particular to an aging evaluation method for single-component RTV coatings (room temperature vulcanizing silicone rubber) based on environmental factors. Background technique [0002] In recent years, with the rapid development of the economy, the problem of air pollution has become more and more serious, and severe weather has caused frequent occurrence of pollution flashover accidents on the external insulation of power transmission and transformation equipment in power systems. At the same time, the development of industrial level has promoted the continuous increase of power grid capacity and the continuous increase of rated voltage level, which makes the impact of external insulation pollution flashover accidents more serious. Since this kind of pollution flashover accident has the characteristics of sudden, long-term, and large power outage area, it not only causes great inconvenience ...

AI Technical Summary

Problems solved by technology

[0004] However, since RTV coatings are organic materials and are mainly used for insulation of outdoor equipment, they will face various chemical, physical, and electrical aging effects such as high temperature, ultraviolet radiation, corona discharge, acid rain, and ozone during use, which will lead to rapid aging. , poor mechanical properties, short service life, loss of hydrophobicity and slow recovery, which weakens its role in increasing the pollution flashover voltage of the external insulation, and directly threatens the safe operation of the power system

[0005] In addition, different environmental factors have different influence mechanisms on the aging of RTV coatings. If a unified index is used for all detection and judgment, the detection will take a long time, which is not convenient for practical application

[0006] According to the requirements of the national standard DL / T 627-2012 "Room Temperature Curing Silicone Rubber Anti-Fouling Flashover Coatings for Insulators", there are currently only two items of aging testing for RTV coatings in operation, one is appearance inspection, and the other is hydrophobicity test. Less, and can not reflect the aging condition of RTV coating

Images