Waterproof and fireproof power cable

Abstract

The invention relates to a waterproof and fireproof power cable. The cable comprises a conductor, an inner insulating layer, an outer insulating layer, a water-tight wrapping tape, a metal armor layerand an outer sheath, wherein the conductor is a tinned copper conductor; a total insulating layer is coextruded outside the inner insulating layer and the outer insulating layer; the water-tight wrapping tape is extruded outside the total insulating layer; the metal armor layer is arranged outside the water-tight wrapping tape; and the outer sheath is arranged outside the metal armor layer. According to the waterproof and fireproof power cable, the insulating property is improved due to a synthetic mica tape wrapping layer; the purposes of fire prevention and flexibility are effectively achieved; and the waterproof and fireproof power cable is simple in structure, good in insulating effect, long in service life, stable in working, fireproof, flame-retardant and low in production cost.

Description

technical field [0001] The invention relates to a power cable, in particular to a waterproof and fireproof power 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 moisture will penetr...

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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