High-flame-retardant optical cable for subway tunnels

Abstract

The invention belongs to the technical field of optical cables, and relates to a high-flame-retardant optical cable for subway tunnels. The high-flame-retardant optical cable for the subway tunnels includes a cable core, and an inner flame-retardant layer, a composite steel wire armor layer and a composite flame-retardant sheath layer which cover the cable core from the inside to the outside. Theoptical fiber, the flame-retardant water-blocking fiber paste, a flame-retardant loose tube, a central reinforcing member and the flame-retardant water-blocking cable paste form the cable core havingflame-retardant and water-blocking properties. In the invention, the multi-layer flame-retardant structure design of the cable core, the inner flame-retardant layer and the composite flame-retardant sheath layer makes the cable burn in the fire without generating toxic gases and smoke, normal communication transmission can be ensured in the event of fire, real-time monitoring of temperature is realized, fire hazards are reduced, and life and property and safety can be ensured; and the combination of the composite steel wire armor layer and the composite flame-retardant sheath layer forms a multi-channel defense against rat and ant bites, enhances the shielding performance and the tensile performance of the optical cable, and prevents the armor layer from " lantern " during the armoring process. The invention is suitable for data transmission in the fields of modern rail transit and the like.

Description

technical field [0001] The invention belongs to the technical field of optical cables, in particular to a high flame-retardant optical cable for subway tunnels. Background technique [0002] With the continuous development of social economy, rail transit has become an indispensable part of urban traffic structure with its characteristics of fast speed, large capacity, low pollution and high efficiency. In the communication system of rail transit, due to the accelerated development of mobile communication technology, especially the rapid rise of mobile Internet, cloud computing, big data, and Internet of Things applications, communication optical cables have been widely used. However, because the rail transit pipeline is long, there are many stations, the area is wide, and the passenger flow is dense. In addition, the subway is buried deep underground, the environment is closed, and the evacuation of passenger flow is limited. Therefore, when a fire occurs in the rail transit...

AI Technical Summary

Problems solved by technology

However, because the rail transit pipeline is long, there are many stations, the area is wide, and the passenger flow is dense. In addition, the subway is buried deep underground, the environment is closed, and the evacuation of passenger flow is limited. Therefore, when a fire occurs in the rail transit, these cables will produce toxic gases and Thick smoke seriously endangers people's life and safety, the subway fire cannot be ignored

And because rats and ants are easy to breed in underground pipelines, the communication cables are bitten by them and the lines are damaged, which will have a serious impact on rail transit

The current communication optical cable cannot resist the above problems, and a kind of optical cable with high flame retardancy and anti-rat and ant bite is needed for subway tunnels

Images