Self-bearing type optical cable for power grid or communication network

Abstract

The invention relates to the technical field of cables, in particular to a self-bearing type optical cable for a power grid or a communication network. The self-bearing type optical cable comprises a cable core, an outer sheath, a reinforcement element, a suspension wire protective layer and a rib, wherein the cable core is composed of a central reinforcement part, a plurality of loose tubes and a protective layer; at least one optical fiber is arranged in each loose tube; two marking strips are symmetrically arranged on the suspension wire protective layer; the suspension wire protective layer, the outer sheath and the rib made from the same materials are integrally formed; in the cable core, the loose tubes are stranded around the central reinforcement part; the stranding mode is spiral stranding or forward and reverse stranding; a marking belt is arranged on the outer sheath; the thickness of each marking strip is 0.2-1.0mm; and the marking strips are made from special materials. The self-bearing type optical cable has the following main benefits: the thickness of the suspension wire protective layer is more convenient to control; the suspension wire protective layer is smoother and rounder; a product is higher in production speed and higher in qualification rate; the optical cable is smaller in self weight and wider in suitable span; and the marking strips are more stable in color.

Description

[0001] This application is a divisional application for an invention patent named: self-supporting optical cable with identification strip, application date: January 26, 2014, and application number: 201410036276.5. technical field [0002] The invention relates to the technical field of cables, in particular to a self-supporting optical cable for a power grid or a communication network. Background technique [0003] Most of the self-supporting optical cables are used for overhead laying. Due to their excellent load-bearing performance, the cables can be laid without additional steel strands for support. Usually, the cables are fixed on the clamps at the towers. That is, it can be placed freely between adjacent towers. However, with the rapid development of the communication industry, the number of cables between poles and towers increases sharply, which brings great trouble to maintenance because it is not easy to distinguish. For this reason, a large amount of researches ...

AI Technical Summary

Problems solved by technology

The above-mentioned document does disclose the marking strip for optical cable identification, but it has the following common defects: (1) using stranded steel wire as the reinforcement part of the suspension wire to realize self-support, although it has achieved the function of greater bearing capacity, but , the sheath outside the stranded steel wire is extremely rough, and the performance of the sheath of the optical cable is extremely unsatisfactory; to achieve smoothness, the thickness of the sheath must be greatly increased, which increases the weight and cost of the optical cable and shortens the span of the optical cable.

(2) According to the defect of (1) above, it is difficult to control the thickness of the marking strip on the suspension wire sheath, so the quality of the product is extremely unstable and the production speed is quite slow

In addition, the color of the identification strips in the prior art is generally unstable. In Southeast Asia, after one year of overhead cable laying, the identification strips have faded to varying degrees, which affects the accurate use of the identification.

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