Triple-extrusion optical fiber composite overhead insulating cable

Abstract

The invention discloses a triple-extrusion optical fiber composite overhead insulating cable. The center of the cable is a conductor inner layer formed by stranding a plurality of stainless steel tubes and aluminum-coated steel wires or galvanized steel wires, a plurality of optical fibers are arranged in each stainless steel tube, in which optical fiber ointment is filled; a hard-drawn aluminum wire is stranded outside the conductor inner layer to form a conductor; and a conductor shielding layer, a main cross-linked polyethylene insulating layer and an outer weatherproof cross-linked polyethylene insulating layer are sequentially arranged outside the conductor, wherein the conductor shielding layer, the main cross-linked polyethylene insulating layer and the outer weatherproof cross-linked polyethylene insulating layer are molded through triple extrusion. The cable disclosed by the invention integrates the optical fibers and the electric power wires, the copper-core conductor is used for power transmission, and an optical cable is used for transmitting optical signals; when electric energy is transmitted, same-network signal transmission can be realized among a telecommunication network, a broadcast television network and an internet; and the design on circuits for transmitting the electric energy and the optical signals is optimized, the influences of repeated construction to the environment and ecological benefits can be greatly reduced, a large amount of manpower, materials resources and financial resources are saved, and moreover, the cable is simple and convenient to lay and is beneficial to space saving.

Description

[0001] technical field [0002] The invention belongs to the field of electric wires and cables, in particular to a three-layer co-extruded optical fiber composite overhead insulated cable. Background technique [0003] At present, the insulation structure of cross-linked polyethylene insulated overhead cables seen in China is a single layer of weather-resistant cross-linked polyethylene. Because the weather-resistant cross-linked polyethylene material is mixed with carbon black that absorbs sunlight energy, the insulation layer The insulation ability of the insulation is reduced, and there will be leakage current on the surface during use. In order to avoid leakage current flowing into the ground and causing voltage loss, insulators must be used at the support during laying. In addition, the current overhead insulated cables usually only have the function of transmitting power. If it is necessary to transmit signals, additional communication cables or optical cables need t...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a three-layer co-extruded optical fiber composite overhead insulated cable in order to solve the problem that the optical fiber needs to go through secondary wiring when laying alone.

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