Environment-friendly double-shielded low-voltage fire-resistant compound insulating high-flame-retardant flexible cable

Abstract

The invention relates to an environment-friendly double-shielded low-voltage fire-resistant compound insulating high-flame-retardant flexible cable. A plurality of flexible copper wires are stranded, then wrapped in a single layer ceramic fire-resistant silica gel band in a winding mode and wrapped in an organosilane crosslinked polyethylene halogen-free layer in an extruded mode, copper wires are sparsely wound outside the organosilane crosslinked polyethylene halogen-free layer in a split-phase mode to form cable cores, the cable cores are stranded into a cable body, then, the cable body is wrapped in three layers of ceramic fire-resistant silicone rubber bands to form a fire-resistant silica gel layer, the fire-resistant silica gel layer is wrapped in an inner halogen-free flame-retardant protecting layer, the positions between the cable cores and the fire-resistant silica gel layer are filled with halogen-free glass fiber ropes, copper wires are sparsely wound outside the inner halogen-free flame-retardant protecting layer, then, the inner halogen-free flam-retardant protecting layer is wrapped in a halogen-free flame-retardant isolating layer in an extruded mode, a zinc-coated steel wire outside the isolating layer is braided in to an armor, and finally, an outer halogen-free flame-retardant protecting layer is wrapped in an extruded mode. The environment-friendly double-shielded low-voltage fire-resistant compound insulating high-flame-retardant flexible cable is good in flexibility, low in toxicity and environmentally friendly, a cable circuit can keep normally running for a certain time when accidents happen, and when the cable is burnt, corrosivity is low and light-transmitting performance is good.

Description

technical field [0001] The invention relates to the field of cables, in particular to an environment-friendly double-shielded low-voltage fire-resistant composite insulated high-flame-retardant flexible cable. Background technique [0002] With the acceleration of my country's social and economic construction and the improvement of people's awareness of environmental protection, halogen-free, low-smoke, flame-retardant and fire-resistant cables are widely used in high-rise buildings, subways, power plants, tunnels and other important departments and public places. When a fire occurs, the cable line is required to maintain normal operation for a certain period of time. At the same time, the cable is less corrosive and has good light transmission when burning, which is of great help to rescue work and can reduce casualties to a large extent. and property damage, so the performance of ordinary cables is not enough to deal with emergency situations caused by many factors. Drive...

AI Technical Summary

Problems solved by technology

When a fire occurs, the cable line is required to maintain normal operation for a certain period of time. At the same time, the cable is less corrosive and has good light transmission when burning, which is of great help to rescue work and can reduce casualties to a large extent. and property damage, so the performance of ordinary cables is not enough to deal with emergency situations caused by many factors

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