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Application of mechanical properties test of materials
Date【2017-08-16 16:56】 All:【】次

First, the status quo of the use of insulation materials

 

Insulating members commonly used in live working are epoxy phenolic glass cloth sheets (also known as 3240) or epoxy phenolic glass cloth tubes (also known as 3640) which are hot-pressed or rolled after being immersed in epoxy resin with glass fiber cloth. ). The material commonly used for live working load-bearing tools is glass cloth board, especially at a voltage level of 330-500 kV, which is more common.

 

Insulation material is the main material for making live working tools, and its performance and quality directly affect the safety of the use of insulating tools. At present, most of the glass cloth sheets and glass cloth tubes in China are made of glass fiber woven cloth as reinforcing material, and epoxy phenolic resin is used as the base material.

 

Second, the production process of drawing insulation materials

 

In the process of manufacturing traditional insulated pipes (including various shaped pipes), the dipped glass fiber cloth strips are manually controlled to pull the tension (the tightness of the cloth strip), cross-wound on the uniformly rotating core, and then dried. Processes such as demoulding, grinding, surface dipping, etc., and the process quality control of each process is separated. The production process of the drawn material is a method of continuously forming the varnished glass fiber, and the whole process and the process parameters are centrally controlled, all under the condition of unmanned operation; the labor intensity of the worker is low, and the production efficiency is low. High and stable product quality. The characteristics of the extracted material are: The ratio of the reinforcing material to the substrate can be adjusted as required. Therefore, the two materials are completely different from the entire production process.

 

Third, the mechanical properties of the pull material test

 

The drawn materials are favored for their good dielectric properties and high tensile strength. Therefore, it is widely used in power systems. In recent years, in the power outages and live working tools, the drawing materials have been gradually used to replace the traditional pipes and plates to make the tensile tools.

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