Laying intelligent composite three-phase medium-voltage cables behind optical fibers

Abstract

The invention discloses a fiber after-laying intelligent composite three-phase medium-voltage cable comprising three circular conductive units and a hollow micro tube. Each conductive unit successively comprises a conductive wire core, a cross-linked polyethylene layer, and an insulated shielding layer from inside to outside, wherein the cross-linked polyethylene layer and the insulated shielding layer wraps the outer surface of the conductive wire core. A wrapping tape wraps the outer surface of the three circular conductive units and the hollow micro tube. The outer surface of the wrapping tape is coated with an inner sheath layer. The hollow micro tube is formed by a tensile layer, an aramid fiber woven layer, and a polyethylene layer. The aramid fiber woven layer is arranged between the tensile layer and the polyethylene layer. The tensile layer comprises the following components: polyamide 6 resin, poly sebacoyl hexylenediamine, ethene and norbornene copolymer, maleic anhydride grafting amorphous polyolefin, N, N'-2([beta]-naphthyl) p-phenylenediamine, double (2, 4-di-t-butyl phenyl) pentaerythritol phosphite ester, polyethylene glycol, and acetic acid glyceride. According to the invention, fiber is easy to be blown into an irregular and long hollow micro tube, and the medium-voltage cable is improved in mechanical strength, bending performance, and bonding force between the aramid fiber woven layer and the polyethylene layer.

Description

technical field [0001] The invention relates to a composite three-phase medium-voltage cable, in particular to an intelligent composite three-phase medium-voltage cable laid after optical fibers. Background technique [0002] Ordinary air-blow laying is horizontal laying, and the micro-cable is blown horizontally into the dedicated preset pipe through mechanical propellers and air compressors. However, for this type of air-blown composite fiber optic cable, the cable cannot be placed horizontally during construction and laying, and it will face various situations such as pipe passing, turning, and hanging, and sometimes even requires direct air blowing on the reel before laying. Laying. The cable is air-blown on the cable reel. During the entire air-blowing laying process, the resistance of the optical unit is greater, and the direction and position of the travel are irregular. The traditional air blowing method cannot meet the requirements of laying optical fiber composit...

AI Technical Summary

Problems solved by technology

The traditional air blowing method cannot meet the requirements of laying optical fiber composite cables after the optical unit, so the main problem of laying optical fiber composite cables after the optical unit is how to solve the air blowing of the optical unit under the conditions of large resistance, irregularity and long distance Laying problems, the requirements for air blowing laying are also greatly improved

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