Composite cross arm and manufacturing process thereof

Abstract

The invention discloses a composite cross arm and a manufacturing process thereof. The composite cross arm comprises an insulating core rod, an umbrella skirt and connectors, wherein the umbrella skirt is fixedly arranged on the insulating core rod; the connectors are fixedly connected to the two ends of the insulating core rod; the insulating core rod has a D-shaped cross section and comprises a resin fiber composite layer which is manufactured by a pultrusion winding process; the umbrella skirt is fixedly poured on the composite layer; and surface coatings are coated on the outer surfaces of the composite layer and the umbrella skirt respectively. Since the core rod which is made of the resin fiber composite material is adopted by the cross arm, the cross arm has light weight and better insulation performance and mechanical performance; and the cross section of the insulating core rod is D-shaped, so that the cross arm has the advantages of capability of preventing ash deposition, convenience in mounting and the like. The fixedly poured umbrella skirt is made of an outdoor resin material; and since the outdoor resin material has superior weather resistance and good mechanical performance, corrosion resistance and water-proof and anti-fouling performance, a person can step on the umbrella skirt to operate during construction, and meanwhile, the damage caused by worms and birds is avoided.

Description

[0001] technical field [0002] The invention relates to the field of supporting components for transmission lines, in particular to a novel composite cross arm for transmission lines and a manufacturing process thereof. [0003] Background technique [0004] In the field of power facilities, the cross arm used for transmission lines is an important supporting structural part of the transmission tower. One end of the cross arm is connected to the transmission tower, and the other end is used to hang the transmission wire. Silicone rubber sheds or ceramic sheds are generally arranged on the insulating cross-arm, so as to increase the creepage distance and improve the insulation level of the cross-arm. [0005] The traditional cross-arm has the form of steel or wooden cross-arm suspension insulators, but the steel or wooden cross-arm will expose various problems in the long-term operation, such as non-insulation, wide transmission corridor, severe conductor galloping, and pr...

AI Technical Summary

Problems solved by technology

[0005]Traditional cross-arms have steel or wooden cross-arm suspension insulators, but steel or wooden cross-arms will expose various problems in long-term operation, such as No insulation, wide transmission corridor, severe conductor galloping, prone to power grid operation accidents

In order to solve the above problems, silicone rubber insulating crossarms have appeared in the prior art, but there are still shortcomings such as low mechanical strength of the shed, unable to stand on people, and easy to be infested by insects and birds.

There is another kind of ceramic insulating cross arm in the prior art, but the ceramic material has the disadvantages of low mechanical strength, easy damage or fracture

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