Surface treatment method for three-post insulator grounding insert

Abstract

The invention provides a surface treatment method for a three-post insulator grounding insert, and the technical scheme of the method comprises the steps: taking the thickness of a semi-conductive adhesive layer on the surface of the three-post insulator grounding insert as a variable, obtaining the tensile strength of three-post insulators with different semi-conductive adhesive layer thicknesses, building a mapping relation between the tensile strength and the thickness of the semi-conductive adhesive layer, on the basis of the thickness value of the selected semi-conductive adhesive layer, taking the surface knurling depth of the grounding insert as a variable, and acquiring the bending strength of the three-post insulator with different knurling depths, establishing the mapping relation between the bending strength and the thickness of the semi-conductive adhesive layer and the knurling depth, establishing a two-factor collaborative algorithm, and obtaining the optimal thickness of the semi-conductive adhesive layer and the optimal knurling depth; and performing surface treatment on the grounding insert of the three-post insulator with the optimal thickness of the semi-conductive adhesive layer and the optimal knurling depth. The method is simple in step, the stress resistance of the three-post insulator post leg can be improved, and the stress fault risk of the three-post insulator post leg is reduced.

Description

technical field [0001] The invention relates to the field of surface treatment of insulation equipment for power transmission and transformation, in particular to a surface treatment method for a grounding insert of a three-pillar insulator. Background technique [0002] Three-post insulators play an important role in electrical insulation and mechanical support in gas-insulated metal-enclosed transmission lines (GIL), and are key electrical components in GIL. The three-pillar insulator is made of epoxy composite material mixed with liquid epoxy resin, acid anhydride curing agent and micron-sized alumina powder filler, and the grounding insert coated with a semi-conductive adhesive layer is integrally cured to ensure that its mechanical strength is GIL safe and stable. One of the important guarantees of operation. [0003] Studies have shown that the fracture of the three-post insulator originates from the interface between the grounding insert and the epoxy composite mater...

AI Technical Summary

Problems solved by technology

[0004] At present, the thickness of the semi-conductive adhesive layer and the depth of knurling on the surface of the grounding insert of the three-post insulator are based on empirical values. This method of surface treatment will make the mechanical strength of the three-post insulator have a certain degree of randomness, which is not clear. Surface treatment of ground inserts to improve mechanical strength of three-post insulators with respect to thickness of semi-conductive adhesive layer and knurling depth

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