Aluminum corrugated metal sheath fireproof cable for subway

Abstract

The invention provides an aluminum corrugated metal sheath fireproof cable for a subway. The aluminum corrugated metal sheath fireproof cable comprises a conductive unit and a protective layer structure outside the conductive unit, wherein the protective layer structure comprises an insulating layer, an insulating shielding layer, a copper wire shielding layer, a reverse binding copper belt layer, a glass fiber belt wrapping tape layer, an inner sheath, an aluminum corrugated metal sheath, a fireproof mud layer and an outer sheath which are sequentially wrapped from inside to outside; and a discharge wire is arranged between the reverse binding copper belt layer and the glass fiber belt wrapping tape layer, and a buffer structure is arranged between the reverse binding copper belt layer and the glass fiber belt wrapping tape layer. The cable is reasonable in structural design, the sheath layer is made of a high-flame-retardant sheath material, and even if a fire occurs, the fireproof mud and the aluminum corrugated metal sheath are burnt and sintered to form a shell to prevent flame and heat from spreading into the cable, so that when the fire occurs, a power supply loop can be ensured to maintain normal work, the release amount of toxic and corrosive gas generated during cable combustion is extremely small, the flame-retardant effect is extremely good, and the concentration of generated smoke is extremely low.

Description

technical field [0001] The invention belongs to the technical field of electric wires and cables, and in particular relates to a fireproof cable with aluminum corrugated metal sheath for subways. Background technique [0002] With the rapid development of my country's economy, the process of urban modernization has been significantly accelerated, and subways have gradually appeared in major and medium cities, and the construction demand is very large. In recent years, fires have caused many major losses of life and property. People have a deeper understanding of fire safety, and the requirements for wires and cables used in important occasions are also getting higher and higher. In important occasions such as subway stations , When a fire occurs, the power supply circuit needs to maintain normal operation in order to ensure the normal supply of power, improve rescue and self-rescue efficiency, and reduce personal casualties and property losses. However, the existing cables ...

AI Technical Summary

Problems solved by technology

However, the existing cables have poor compressive performance, and the shielding performance is not stable enough. Especially in extreme working conditions, signal fluctuations or even interruptions are likely to occur. Especially when a fire occurs, the flame retardant performance and environmental protection performance are poor, which will affect rescue and rescue. Trapped people escape

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