High-flame-retardance anti-rat-biting center pipe type optical cable

Abstract

The invention discloses a high-flame-retardance anti-rat-biting center pipe type optical cable. The high-flame-retardance anti-rat-biting center pipe type optical cable sequentially comprises an optical fiber, a center pipe, a glass fiber band, an aluminum alloy pipe and an outer sheath layer from inside to outside. The optical fiber is arranged in the center pipe and arranged in the length direction of the center pipe. The center pipe is filled with fiber paste. The center pipe is wrapped by the glass fiber band, the aluminum alloy pipe is arranged outside the glass fiber band, the aluminum alloy pipe forms a closed structure in the mode that an aluminum alloy band surrounds the glass fiber band for adhesion, a tubular body is formed through argon arc welding, the exterior of the aluminumalloy pipe is of a spiral wave-shaped structure, and embossing is rolled on the outer surface of the aluminum alloy pipe. The outer sheath layer is extruded outside the aluminum alloy pipe. The spiral wave-shaped corrugated aluminum alloy pipe replaces a metal composite band longitudinal wrapping structure in the prior art, the problems that a longitudinal wrapping metal composite band is low instructural strength and prone to warping are solved, and the biting-resistant strength of the optical cable is improved.

Description

technical field [0001] The invention belongs to the technical field of optical cables, and in particular relates to a central tube type optical cable with high fire resistance and rat bite prevention. Background technique [0002] At present, overhead optical cables in the field are easily bitten by squirrels, causing irreversible damage to the optical cables, and may also be subject to natural disasters such as fires. In the existing optical cable structure, in order to improve the tear resistance of the cable, a metal composite tape layer is usually provided, usually a steel-plastic composite tape or an aluminum-plastic composite tape. It is wound outside the optical fiber, so the overall structural strength of the optical cable is reduced. At the same time, the metal composite tape is easy to warp during the longitudinal wrapping process, resulting in unstable structure and easy to be bitten by squirrels. Contents of the invention [0003] The object of the present inv...

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Problems solved by technology

[0002] At present, aerial optical cables in the field are easily bitten by squirrels, causing irreversible damage to the optical cables, and may also be affected by natural disasters such as fires.

In the existing optical cable structure, in order to improve the tear resistance of the cable, a metal composite tape layer is usually provided, usually a steel-plastic composite tape or an aluminum-plastic composite tape. Wound outside the optical fiber, so the overall structural strength of the optical cable is reduced. At the same time, the metal composite tape is easy to warp during the longitudinal wrapping process, resulting in unstable structure and easy to be bitten by squirrels.

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