Fireproof ultraviolet-ray-resistant multi-core optical cable

Abstract

The invention discloses a fireproof ultraviolet-ray-resistant multi-core optical cable which relates to the technical field of fibers and optical cables. The multi-core optical cable comprises two optical cable cores and two carbon fiber composite core rods at the inner part, an outer shielding layer and an outer insulating layer arranged outside. A metal pipe, a fiber sleeve and a metal woven netare arranged between the outer insulating layer and the outer shielding layer. The outer insulating layer comprises a first polytetrafluoroethylene layer, a ceramic silicon rubber layer and high-flame-retardance halogen-free polyethylene layer which are successively arranged from inside to outside. An inner protecting layer is arranged outside the optical fiber cores and the carbon fiber composite core rods. The inner protecting layer comprises a second polytetrafluoroethylene layer, a silicon nitride ceramic layer, an inner shielding layer and a low-flame-retardance halogen-free polyethylenelayer which are successively arranged from inside to outside. An optical cable filler is arranged between the low-flame-retardance halogen-free polyethylene layer and the outer shielding layer. The fireproof ultraviolet-ray-resistant multi-core optical cable has advantages of excellent fireproof performance, excellent flame retardance, excellent ultraviolet ray resistance, stable integral structure and effective service life prolonging.

Description

technical field [0001] The invention relates to the technical field of optical fiber and cable, in particular to a fire-proof and ultraviolet-resistant multi-core optical cable. Background technique [0002] An optical cable is a communication line in which a certain number of optical fibers form a cable core in a certain way, and is covered with a sheath, and some are also covered with an outer sheath to realize optical signal transmission. The outer sheath of the multi-core optical cable is generally made of plastic materials such as polyvinyl chloride. Under the action of ultraviolet rays in the outdoor environment, it will age faster with time, and even crack and lose its original physical properties, resulting in damage to the optical cable or increased fiber loss. . [0003] When the traditional multi-core optical cable is used in an outdoor environment, its service life generally does not exceed 5 years. In places such as mountainous areas or densely populated cities...

AI Technical Summary

Problems solved by technology

The outer sheath of the multi-core optical cable is generally made of plastic materials such as polyvinyl chloride. Under the action of ultraviolet rays in the outdoor environment, it will age faster with time, and even crack and lose its original physical properties, resulting in damage to the optical cable or increased fiber loss.

[0003] When the traditional multi-core optical cable is used in an outdoor environment, its service life generally does not exceed 5 years. In places such as mountainous areas or densely populated cities, the replacement and maintenance costs of the optical cable are relatively high. , cannot be processed in time, and the processing cost is relatively high; and outdoor optical cables have the risk of fire after high temperature or lightning strikes. Traditional multi-core optical cables only rely on the outer layer of PVC plastic to resist fire and flame retardancy, and the effect is not ideal. After that, a large amount of toxic gas will be produced, which will endanger the environment and human health.

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