Highly flame-retardant and fire-retardant cable

Abstract

The invention discloses a highly flame-retardant and fire-retardant cable. The highly flame-retardant and fire-retardant cable comprises a cable core. The cable core comprises a waterproof layer and a central reinforcing piece arranged in the central position of the cable core, wherein the waterproof layer covers the outmost layer of the cable core. A filling rope, a waterproof piece and a plurality of loose casing pipes are arranged between the waterproof layer and the central reinforcing piece and are hinged to the outside of the central reinforcing piece, optical fiber units are arranged in the loose casing pipes, waterproof filler is arranged between the loose casing pipes and the optical fiber units, a highly flame-retardant thermal insulation layer covers the outside of the cable core, an inner flame-retardant protection layer covers the outside of the highly flame-retardant thermal insulation layer, an outer flame-retardant protection layer is arranged on the outside of the inner flame-retardant protection layer, and a metal protection layer is arranged between the inner flame-retardant protection layer and the outer flame-retardant protection layer. The highly flame-retardant and fire-retardant cable has the advantages of being reasonable in design, simple in structure and strong in flame-retardant and fire-retardant performance and facilitates popularization.

Description

technical field [0001] The invention relates to an optical cable, in particular to a highly flame-resistant and fire-resistant optical cable. Background technique [0002] In relatively closed spaces such as railway tunnels, subways, rail transit, high-rise buildings, oil depots, mines, etc., more and more optical fiber optic cables are used as transmission lines for optical fiber communication, monitoring and control systems. After a fire occurs, the optical cables used will burn quickly. Burning loss leads to the failure of the optical fiber cable transmission system, and then the fire-resistant optical cable begins to be widely used. [0003] However, in the fire-resistant optical cable of the prior art, when the optical cable is on fire, the outer protective layer of the optical cable emits toxic gas during the burning process, which increases casualties and property losses, and is also not conducive to environmental protection requirements. In addition, when the fire bu...

AI Technical Summary

Problems solved by technology

[0003] However, in the fire-resistant optical cable of the prior art, when the optical cable is on fire, the outer protective layer of the optical cable emits toxic gas during the burning process, which increases casualties and property losses, and is also not conducive to environmental protection requirements. In addition, when the fire burns outside the optical cable , can not well block the heat outside the cable, which will increase the heat inside the cable, interrupt the transmission of the fiber, and further increase the safety of personal and property

Images