Irregular cable

Abstract

The invention belongs to the technical field of cables, in particular to an irregular cable, which is characterized by comprising four irregular bodies, protection sleeves and cable cores. Each irregular body comprises a reinforcing part, an irregular member and a connection rib. The four protection sleeves are round, and each protection sleeve is located between adjacent irregular bodies. The protection sleeves wrap the cable cores. The protection sleeves are characterized in that the density is 0.945-0.965g / cm<3>, the tensile strength is larger than or equal to 20MPa, the carbon black content is 2.9%-3.5%, the dielectric strength is larger than or equal to 30KV / mm, the bending strength ranges from 30MPa-50MPa and -50-80 DEG C in 3.5% strain, and the axial later stage contractibility rate ranges from -1% to 1% within 48 hours. The irregular cable is small in peripheral dimension, small in material consumption, less in working procedure number, low in production cost, more convenient to lay and higher in mechanical reliability under stress.

Description

technical field [0001] The invention belongs to the technical field of cables, and in particular relates to a special-shaped cable in which not all reinforcements are located in the center. Background technique [0002] The application of optical cables and electric cables has become increasingly popular. In the prior art, optical cables are usually in a circular structure, and are stranded by a plurality of loose tubes and filling ropes around the strength member located in the center of the optical cable, and then the stranded body is covered with resistance. The water or moisture-proof layer is covered with a sheath layer outside the water-blocking or moisture-proof layer. This kind of optical fiber cable usually has a large outer diameter, which is not conducive to overhead laying; Therefore, construction is inconvenient. In the prior art, the above-mentioned problems also exist in cables. Contents of the invention [0003] In order to solve the above problems, the p...

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Problems solved by technology

[0002] The application of optical cables and electric cables has become increasingly popular. In the prior art, optical cables are usually in a circular structure, and are stranded by a plurality of loose tubes and filling ropes around the strength member located in the center of the optical cable, and then the stranded body is covered with resistance. The water or moisture-proof layer is covered with a sheath layer outside the water-blocking or moisture-proof layer. This kind of optical cable usually has a large outer diameter, which is not conducive to overhead laying; Therefore, it is inconvenient to construct

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