An environmentally friendly flexible fireproof cable

Abstract

The invention relates to an environment-friendly type flexible fireproof cable. The environment-friendly type flexible fireproof cable is characterized in that the fireproof insulated cable is formed by an outer wrapping layer and an inner core; the inner core is formed by stranding of a single core cable core or a multi-core cable core; the cable core is lapped with a double fireproof insulating layer; the outer wrapping layer is formed by means of successive wrapping of a thermal insulation layer, an oxygen isolating layer, an anti-impact layer and an oversheath; the double fireproof insulating layer is formed by stacking and lapping of internal and external layers of insulating layers made of different materials; the internal layer is lapped with a mineral insulating fireproof wrapping tape in a stacking way, and the thickness of the wrapping tape is 0.1-0.2mm; and the external layer is lapped with the fireproof material-ceramic polyolefin insulating material, and the thickness of the material-ceramic polyolefin insulating material is 1.0mm-3.5mm. During the combustion process, the double fireproof insulating layer can be quickly sintered into a hard ceramic hard housing which can effectively isolate the internal of the line from infringement of the high temperature flame and guarantee opening of the line when a fire occurs, wherein the cable works under the rated operational voltage; the flame temperature is greater than or equal to 750DEG C; and a fuse is not disconnected within the 90min fire supply time.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to an environment-friendly flexible fireproof cable. Background technique [0002] At present, with the rapid development of my country's social economy, there are more and more important engineering facilities such as subways, tunnels, power plants, and nuclear power plants, as well as large supermarkets, exhibition centers, and other crowded places, which put forward requirements for safety performance in case of fire. It is required that the cable can still maintain normal power supply for a period of time in case of fire, so as to facilitate escape and rescue. [0003] However, due to the production process and quality requirements of the general fireproof cable itself, it is only a simple filling or wrapping fireproof layer, which has many defects. Either it cannot produce cables with large cross-sections and long lengths, or the insulating layer of the wrapping falls off, causin...

AI Technical Summary

Problems solved by technology

[0003] However, due to the production process and quality requirements of the general fireproof cable itself, it is only a simple filling or wrapping of the fireproof layer, which has many defects. Either it cannot produce cables with large cross-sections and long lengths, or the insulating layer of the wrapping falls off and causes accidents.

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