Low-voltage glass fiber reinforced plastic overhead circuit cross arm

Abstract

The invention belongs to a low-voltage power distribution device, and particularly discloses an overhead circuit cross arm. A force bearing rod is made of glass fiber reinforced plastic profiles. The force bearing rod and 2-6 stringing grooves on the force bearing rod form an integrated 2-6-wire insulator. The four-six-wire tension resisting cross arm used as a tension resisting rod is of an adjustable triangular truss structure. The low-voltage glass fiber reinforced plastic overhead circuit cross arm has a series of advantages of resisting corrosion, being low in weight, high in mechanical strength, long in service life, easy to transport and install and good in force bearing and insulation performance and the like.

Description

technical field [0001] The invention relates to a low-voltage power distribution device, in particular to a cross-arm of a low-voltage overhead line. Background technique [0002] At present, there are two kinds of cross-arms commonly used on low-voltage lines: wooden cross-arm and iron cross-arm. The wooden cross-arm is composed of wooden load-bearing rods and insulating insulators. The load-bearing rods are fixed on the poles by bolts, nuts and diagonal bracing irons. Its main disadvantage is that it is susceptible to insects and corrosion, and has a short service life. Today, when the supply of wood is increasingly tight, it has been basically eliminated. The iron cross arm is made of angle steel or channel steel and other profiles as load-bearing rods, and is fixed with the pole with fasteners composed of U-shaped hoop and M-shaped iron, and insulators are installed on the load-bearing rods. to lay the wires and insulate them. This iron cross arm has higher bearing st...

AI Technical Summary

Problems solved by technology

[0003] In recent years, ceramic cross-arms that have been widely used have good insulation and chemical stability, and there are no moths, but there are two main disadvantages: one is expensive, so it is only used on high-voltage overhead lines

Second, due to the limitation of the structure of the ceramic cross-arm, one cross-arm can only erect one wire; while the ceramic cross-arm of the tension-bearing rod must be used in conjunction with the metal cross-arm, which can only be used as a tension insulator and installed on the metal cross-arm. It cannot be an independent cross arm, and because of the low tensile strength of ceramic materials, it is unreasonable to use it as a tension member

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