Enclosed armored smokeless halogen-free non-combustible power cable

Abstract

The invention relates to an enclosed armored smokeless halogen-free non-combustible power cable. The cable comprises a sheath, an insulating layer and a conductor, wherein the sheath, the insulating layer and the conductor are sequentially arranged from outside to inside. A filler is arranged between the sheath and the insulating layer. The sheath is a welded embossed metal armored sheath. Compared with the prior art, the enclosed armored smokeless halogen-free non-combustible power cable provided by the invention has the advantages of wide use range, safety, reliability, good sealing performance, convenient installation and maintenance and the like.

Description

technical field [0001] The invention relates to a power cable, in particular to a hermetic sheathed smoke-free, halogen-free and non-combustible power cable. Background technique [0002] At present, the cable sheath layer is generally made of soft PVC and PE plastics. Usually, there will be a certain degree of aging over time, especially for some inferior PVC. When the high-power equipment is in use, it generates a lot of heat, resulting in high temperature. In dry conditions and without ventilation, these aging, temperature-resistant PVC sheaths and PE sheaths are easy to spontaneously ignite, and when a fire occurs outside These organic materials are more flammable. Conventional steel tape armored or interlocked armored cables are not airtight, easy to breathe and water, and have no barrier effect on flames. [0003] According to statistics, the number of fire accidents caused by the fault of the cable itself accounts for about 1 / 3 of the total cable fire accidents. The...

AI Technical Summary

Problems solved by technology

(2) After long-term operation of the cable, the insulation is aging, the breakdown is short-circuited and the fire is caused.

(3) Poor cable laying conditions (high temperature or accumulated water) cause insulation drop, short circuit and fire

(4) The cable is damaged by external force and causes insulation damage, short circuit and fire

(5) The cable is overloaded for a long time, or the protection (switch) device cannot cut off the short-circuit current of the load in time, resulting in overheating of the insulation, damage to the cable short-circuit and fire

(6) Oil leakage from oil-filled cables causes fire

(3) Explosion of the pulverizing system caused the cable to catch fire

(5) Fire caused by failure of electrical equipment causes the cable to catch fire

(6) Other sundries caught fire and caused the cable to catch fire

[0005] Chinese patent CN202650664U discloses a smoke-free, halogen-free, flame-retardant power cable, which solves the problems of poor flame-retardant power cables in the prior art, easily causing secondary disasters, and high copper consumption. It provides a smoke-free, halogen-free, and flame-retardant power cable, which includes Cable core, halogen-free high flame-retardant filling material, halogen-free flame-retardant tape wrapping, halogen-free flame-retardant outer sheath; halogen-free high flame-retardant filler is filled between the cable core and the halogen-free flame-retardant tape wrapping material, the outermost layer is a halogen-free flame retardant outer sheath

However, the cable is made of halogen-free high flame-retardant filling material, and there is no requirement for the outermost sheath armor, so it is impossible to protect the cable from the source

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