Low-attenuation expansion photoelectric composite low-voltage cable

Abstract

The invention discloses a low-attenuation expansion photoelectric composite low-voltage cable. The surfaces of a ground wire core conductor, three power wire core conductors and a control wire core conductor are coated with insulating layers; the outer surface of a photoelectric unit is coated with a first heat-resistant sheath layer; a reserved light channel comprises a tensile insulating layer and a second heat-resistant sheath layer coating the outer surface of the tensile insulating layer; and the first heat-resistant sheath layer and the second heat-resistant sheath layer are prepared from the following components: high-density polyethylene resin, low-density polyethylene resin, poly(p-benzamide), trioctyl trimellitate, stearic acid, barium stearate, tributyl citrate, kieselguhr, maleic anhydride-grafted polyethylene, a calcium-zinc heat stabilizer, an antioxidant and aminopropyltriethoxysilane. The aging test temperature of a thermoplastic sheath material reaches below 158 DEG C,and the tensile strength change rate and the breaking elongation change rate are not greater than + / -20%.

Description

technical field [0001] The invention relates to the technical field of optical fiber composite low-voltage cables, in particular to a low-attenuation and expansion-capacity photoelectric composite low-voltage cable. Background technique [0002] In the field of power optical fiber transmission, heat-resistant optical units and expansion channels are added to low-voltage power cables, and optical fiber expansion is carried out by using the optical unit air blowing method laid after the optical units. The product itself has added heat-resistant optical units to low-voltage power cables. Type optical unit and pre-installed optical communication pipeline, mainly have the following technical problems: [0003] 1. The electrical unit (insulated wire core) in the optical fiber composite low-voltage cable has good physical and mechanical properties, and it is not easy to cause destructive effects on its electrical properties in the production process of each process; while the optic...

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Problems solved by technology

[0005] 3. Ordinary air blowing laying of optical cables is laid horizontally. Through mechanical propellers and air compressors, the air blowing is only to blow the microcables horizontally into the special preset pipeline.

The traditional air blowing method cannot meet the requirements of laying optical fiber composite cables after the optical unit, so the main problem of the expandable optical fiber composite cable is how to solve the expansion of the optical unit under the conditions of large resistance, irregularity and long distance. Problems, the requirements for expansion air blowing laying have also been greatly improved

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