Special fireproofing optical cable for metro

Abstract

The invention relates to a special fireproofing optical cable for metro, which comprises four optical fibers with different colors. A stainless steel pipe is arranged outside the optical fibers; a filling fiber paste is filled in the stainless steel pipe; a low-smoke halogen-free internal sheath is coated outside the stainless steel pipe; a waterproof unit is extruded and molded outside the low-smoke halogen-free internal sheath; an armoring tape is coated outside the waterproof unit; and a low-smoke halogen-free external sheath is arranged outside the armoring tape. The cable has the advantages that the special fireproofing optical cable for metro adopts the stainless steel pipe optical fiber unit, which can effectively improve waterproof, fireproof and ratproof functions, further improves safety and service life of the cable; when designing the cable, in view of convenience and environment protection of the cable construction, a semidry construction structure is adopted; the cable is easy to peel off for construction and optical fiber continuing and so on; the steel pipe optical fiber unit can bear 800 DEG C., and the normal communication side is not influenced.

Description

technical field [0001] The invention relates to an optical cable, in particular to a special fireproof optical cable for subways. Background technique [0002] In recent years, with the development of public transportation in my country, especially the successive development of subway transportation in large and medium-sized cities, the demand for optical cables for subways has gradually increased, and the technical requirements for optical cables dedicated to subways have also become higher and higher; currently, the general optical cables for subways are GYFTZY Non-metallic flame-retardant optical cable, due to its own structure, this optical cable is directly covered with a low-smoke and halogen-free sheath. Flame retardant, not suitable for use as a dedicated optical cable for subway access. [0003] Contents of the invention [0004] The object of the present invention is to provide a fireproof optical cable dedicated to subways which is safe, reliable and has a long ...

AI Technical Summary

Problems solved by technology

[0002] In recent years, with the development of public transportation in China, especially the successive development of subway transportation in large and medium-sized cities, the demand for optical cables for subways has gradually increased, and the technical requirements for optical cables dedicated to subways have also become higher and higher; the current general-purpose optical cables for subways are GYFTZY Non-metallic flame-retardant optical cable, due to its own structure, this optical cable is directly covered with a low-smoke and halogen-free sheath. Flame retardant, not suitable for use as a dedicated optical cable for subway access

Images