Preparation method of epoxy resin with high mechanical strength

Abstract

The invention relates to a preparation method of epoxy resin with high mechanical strength. The preparation method comprises: a weighing step, a preheating step, a mixing step and a cooling step, wherein the weighing step, the preheating step, the mixing step and the cooling step are carried out in sequence. The preparation method has the beneficial effects that a certain mass fraction of micron-grade alumina crystal whiskers are uniformly mixed with an epoxy resin substrate through a certain mean to prepare the novel epoxy resin, and the novel epoxy resin is used as a preparation base material for epoxy-based insulating parts, so that the mechanical strength of the epoxy-based insulating parts can be remarkably improved.

Description

technical field [0001] The invention relates to the field of raw material preparation for insulating parts, in particular to a method for preparing epoxy resin with high mechanical strength. Background technique [0002] GIL internal post insulators function to support current-carrying conductors. During the operation, it will be subjected to the combined stress of heat, machinery and electricity. As the operation time increases, the product will inevitably age and its mechanical properties will decline; in addition, during the product preparation process, due to uneven heating of the mold, This will lead to residual stress during the curing process inside the insulating part, especially at the interface between the insert and epoxy, there will be a large stress effect, which will become an important cause of mechanical damage. At present, there have been more than 40 years of application cases for AC GIL. However, for 550kV or even 1000kV GIL, many domestic high-voltage sw...

AI Technical Summary

Problems solved by technology

During the operation, it will be subjected to the combined stress of heat, machinery and electricity. As the operation time increases, the product will inevitably age and its mechanical properties will decline; in addition, during the product preparation process, due to uneven heating of the mold, This will lead to residual stress during the curing process inside the insulation, especially at the interface between the insert and epoxy, there will be a large stress, which will become an important cause of mechanical damage

At present, there have been more than 40 years of application cases for AC GIL. However, for 550kV or even 1000kV GIL, many domestic high-voltage switchg If there are differences in certain details or negligence in the production process, the mechanical properties of domestic post insulators will decrease and the scrap rate will increase.

Therefore, the stable control and improvement of the mechanical properties of domestic GIL post insulators is still a difficult problem, which restricts the research and development of domestic GIL with voltage levels of 550kV and above

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