Low-smoke flame-retardant insulated cable

Abstract

The invention relates to a low-smoke flame-retardant insulated cable, which comprises conductors, an inner sheath and an outer sheath, wherein the conductors are three tin-plated copper conductors; insulated conductor cores composed of mica tape fireproof layers and polyethylene insulation layers are sequentially arranged outside each conductor; and a PP warping tape layer, an inner sheath, a copper wire braided armored layer and an outer polyethylene sheath are sequentially wrapped outside the three conductor cores together. The low-smoke flame-retardant insulated cable has the advantages of simple structure, safety in use, good low-smoke flame-retardant effect, good insulating property and good anti-jamming effect, and the mechanical strength and the physical properties of the cable are increased.

Description

technical field [0001] The invention relates to a special power cable, in particular to a low-smoke flame-retardant insulated cable. Background technique [0002] At present, fireproof cables usually use organic materials such as rubber and plastic as insulating materials. When the cable catches fire, the insulating layer burns out, and the smoke caused by the burning of plastics will cause "secondary disasters"; traditional mineral insulated cables use magnesium oxide Metal oxides such as powder are used as insulating materials for cables. It has excellent fire resistance, explosion-proof, high temperature resistance and other properties, which can ensure the power supply of the fire line within a certain period of time and improve the fire performance of the cable. However, the process is complicated and the cost is high. At the same time, the manufacturing length is also limited; magnesium oxide powder is easy to absorb moisture, and after moisture absorption, the moistur...

AI Technical Summary

Problems solved by technology

[0002] At present, fireproof cables usually use organic materials such as rubber and plastic as insulating materials. When the cable catches fire, the insulating layer burns out, and the smoke caused by the burning of plastics will cause "secondary disasters"; traditional mineral insulated cables use magnesium oxide Metal oxides such as powder are used as insulating materials for cables. It has excellent fire resistance, explosion-proof, high temperature resistance, etc., which ensures the power supply of the fire line within a certain period of time and improves the fire performance of the cable. However, the process is complicated and the cost is high.

At the same time, the manufacturing length is also limited; magnesium oxide powder is easy to absorb moisture, and after moisture absorption, the moisture will penetrate longitudinally along the cable, resulting in a decrease in the insulation performance of the cable and affecting the electrical performance.

In addition, the bending performance of the cable is poor, the installation and laying are inconvenient, and the scope of use is limited

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