High-intensity flame-retardant environment-friendly light-weight overhead insulation cable

Abstract

The invention discloses a high-strength flame-retardant and environment-friendly light overhead insulated cable. The high-strength flame-retardant and environment-friendly light overhead insulated cable includes a conductor and an insulation layer. structure, the center of the conductor is a galvanized steel wire, and the galvanized steel wire is provided with an inner layer coil and an outer layer coil in sequence, and the inner layer coil and the outer layer coil are respectively composed of several aluminum alloy trapezoidal single wires twisted, the insulating layer includes a main insulating layer and a flame-retardant layer, the main insulating layer is arranged on the outer surface of the conductor, and the flame-retardant layer is arranged on the outer surface of the main insulating layer. The invention has high tensile strength and can effectively reduce the consumption of auxiliary equipment for cable laying; and the weight of the cable is light, which reduces the difficulty of transportation, installation and laying; at the same time, it ensures that the electrical performance of the cable is better than that of the aluminum alloy with the same specification. The DC resistance of the circular conductor can carry a larger current carrying capacity.

Description

technical field [0001] The invention relates to an overhead insulated cable, in particular to a high-strength flame-retardant and environment-friendly lightweight overhead insulated cable. Background technique [0002] With the rapid development of the distribution network, the power supply area is covered by trees, severe corrosion, typhoon and many other factors. Make the reliability of the distribution network face new difficulties. All kinds of threats posed by nature to the distribution network. The aluminum alloy core overhead insulated cable has an insulating structure, which can protect the cable conductors from environmental influences in a more complex environment, and has better insulation performance between conductors, which greatly improves the safety and reliability of power transmission and distribution. However, due to the shortage of land resources in our country, ordinary aluminum alloy core overhead insulated cables need to erect a large number of poles...

AI Technical Summary

Problems solved by technology

However, due to the shortage of land resources in our country, ordinary aluminum alloy core overhead insulated cables need to erect a large number of poles and towers for laying due to their poor tensile resistance, and the cable towers have certain requirements for the area and location of the land, which increases the difficulty of laying. The insulation material of alloy core overhead insulated cables is currently cross-linked polyethylene insulation material, which is not flame retardant and cannot meet the requirements of flame retardant applications

However, the steel-cored aluminum alloy stranded wire with better tensile strength is a bare overhead conductor, the conductor is a circular non-compressed structure, the outer diameter of the conductor is large, and the insufficient contact between the single wires in the conductor will increase the DC resistance of the conductor. Exposure to the air, the surface of the single wire of the conductor is polluted, affecting the safe transmission of electricity

Images