Self-supporting fiber optic cable with identification strip

Abstract

The invention relates to the technical field of cables, in particular to a self-supporting optical cable with marking strips. The self-supporting optical cable with the marking strips is formed by a cable core, an outer protecting sleeve wrapping the cable core, a strengthening element, a suspension wire protecting layer wrapping the strengthening element and a rib enabling the suspension wire protecting layer and the outer protecting sleeve to be connected. The cable core is formed by a central strengthening piece located in the center, a plurality of loose sleeve pipes located outside the central strengthening piece and a protecting layer. Optical fibers are arranged in the loose sleeve pipes. The self-supporting optical cable with the marking strips is characterized in that the strengthening element is made of a steel wire or glass fiber strengthening plastic, the two marking strips are symmetrically arranged on the suspension wire protecting layer, and the suspension wire protecting layer, the outer protecting sleeve and the rib are formed integrally and are made of identical materials. The invention further discloses the components and proportions of the marking strips. The self-supporting optical cable with the marking strips has the advantages that the thickness of the suspension wire protecting layer is more convenient to control, more smooth and round, products can be produced faster and are higher in qualified rate, the optical fibers are lower in self-weight and longer in adaptive span, and the color of the marking strips is more stable.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to a self-supporting optical cable with identification strips. Background technique [0002] 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 have been carried out at home and abroad. The announcement number is CN202196211U, and the name is 8-shaped self-supporting aerial optical cable with color stripes on the surface. It includes an optical cable core and an outer sheath. ...

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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