Preparation method of composite insulator of hard material layer reinforced core rod

Abstract

The invention discloses a preparation method of a composite insulator of a hard material layer reinforced core rod. A hard material of a hard material layer comprises the following components in parts by weight: 100 parts of alicyclic epoxy resin, 30-50 parts of plastic, 20-40 parts of a methylhexahydrophthalic anhydride curing agent, 10-15 parts of an aluminum trihydrate micro-powder flame retardant, 1-2 parts of a silanization coupling agent and 2-10 parts of a fluoride auxiliary agent. The preparation method comprises the following steps: inserting an insulating core rod into a center hole of a hardware fitting, and then forming an integral body through crimping or gluing; putting the insulating core rod-hardware fitting composite body into a mold, and forming a hard material layer on the outer surface of the core rod; and forming a silicon rubber sheath and a silicon rubber umbrella skirt on the outer side of the insulating core rod-hardware fitting composite body with the hard material layer to obtain the hard material layer reinforced core rod. The reinforced core rod is wrapped by the hard material layer, and the silicon rubber sheath and the umbrella skirts are adopted, so that the composite insulator has the characteristics of high hardness, corrosion resistance, bird pecking resistance and the like, and the performance of the composite insulator is further improved.

Description

technical field [0001] The invention belongs to the technical field of insulator manufacture, and in particular relates to a method for preparing a composite insulator with a novel hard material layer reinforced core rod. Background technique [0002] Composite insulators are widely used in power systems because of their small size, light weight, and high pollution flashover voltage resistance. With the widespread use of composite insulators, composite insulators on transmission lines are often pecked by birds, and birds pecking composite insulators will cause damage to composite insulators. The main parts of birds pecking on composite insulators are composite insulator sheds and sheaths. Birds pecking at the shed of the composite insulator will cause penetrating through holes or partial tearing of the shed, reducing the creepage distance of the composite insulator and affecting the external insulation performance of the composite insulator; birds pecking at the sheath of t...

AI Technical Summary

Problems solved by technology

Birds pecking at the shed of the composite insulator will cause penetrating through holes or partial tearing of the shed, reducing the creepage distance of the composite insulator and affecting the external insulation performance of the composite insulator; birds pecking at the sheath of the composite insulator will cause The sleeve is worn and the mandrel is exposed, which leads to the damage of the end seal. In rainy days, foggy days and other high-humidity weather conditions, partial arc discharge is easy to occur between the exposed mandrel and the wet sheath interface, which makes the mandrel produce an electrochemical reaction.

In more severe conditions, insulators eaten by birds may suffer from brittle fractures and other vicious accidents

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