Flame-retardant and fire-resistant marine power cable and manufacturing method thereof

Abstract

The invention relates to a power cable for a flame-retardant fireproof boat and a manufacturing method thereof. Flame-retardant fireproof ethylene propylene rubber insulating layers are uniformly extruded on the peripheries of stranded copper conductors in a wrapping way to form power cable insulated cores; a plurality of power cable insulated cores are stranded to form a power cable core; the periphery of the power cable core is coated with a low-intensity non-woven fabric longitudinally-covered layer; an inner jacket is extruded on the periphery of the low-intensity non-woven fabric longitudinally-covered layer in a wrapping way; the periphery of the inner jacket is coated with an armor braid; and an outer jacket is extruded on the periphery of the armor braid in a wrapping way. The cable disclosed by the invention adopts the low-intensity non-woven fabric longitudinally-covered layer of which the shape is completely in fit with that of each power cable insulated core, so that gaps between the low-intensity non-woven fabric longitudinally-covered layer and the power cable insulated cores are eliminated, flame can be conveniently prevented from being spread and transferred inwards under the burning condition, and resistance to impregnation of humidity can be enhanced; and meanwhile, the low-intensity non-woven fabric longitudinally-covered layer can ensure that the inner jacket and the insulated cores are not adhered, so that the insulated cores are not damaged when the jacket is stripped in the constructing process.

Description

technical field

[0001] The invention relates to a power cable, in particular to a flame-retardant and fire-resistant marine power cable. The invention also relates to a method for manufacturing a flame-retardant and fire-resistant marine power cable. Background technique

[0002] At present, fire-resistant marine power cables generally adopt several structures such as mica tape wrapped conductor, mineral insulation, and extruded refractory silicone rubber outer braided glass fiber wire combination insulation, etc., but these types of fire-resistant cables have great disadvantages:

[0003] Mica tape wrapped refractory cables are wrapped with mica tape outside the conductor. Due to the large number of cores in marine power cables, using mica tape to wrap will result in a large outer diameter and heavy weight of the finished cable, which is not conducive to the load of the ship.

[0004] The remarkable feature of mineral insulated cables is that the conductor is covered with ...

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