Flame-retardant and fire-resistant marine pair-twisted shielded instrument cable and manufacturing method thereof

Abstract

The invention relates to a pair-twist shielding instrument cable for a flame-retardant fireproof boat and a manufacturing method thereof. Flame-retardant fireproof ethylene propylene rubber insulating layers are extruded on the peripheries of stranded copper conductors in a wrapping way to form insulated cores; the insulated cores are stranded in pairs to form pair-twist wire pairs; gaps of the pair-twist wire pairs are filled with flame-retardant non-absorbent fiber fillers; the periphery of each group of pair-twist wire pairs is wrapped in a copper foil polyester composite belt shielding layer to form a pair-twist group; the copper foil surfaces of the copper foil polyester composite belt shielding layers are inward and tinned stranded copper-wire drainage wires are arranged inside the copper foil polyester composite belt shielding layers; a plurality of groups of pair-twist wire pairs are stranded to form a cable core; and the periphery of the cable core is sequentially coated with a low-intensity non-woven fabric longitudinally-covered layer, an inner jacket, an armor braid and an outer jacket sequentially from inside out. The low-intensity non-woven fabric longitudinally-covered layer is completely in fit with each insulated core in shape, so that gaps between the low-intensity non-woven fabric longitudinally-covered layer and the insulated cores are eliminated, and flame can be conveniently prevented from being spread inwards; and meanwhile, the inner jacket and the insulated cores are guaranteed not to be 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 pair-twisted shielded instrument cable, in particular to a pair-twisted shielded instrument cable for flame-retardant and fire-resistant ships. The invention also relates to a manufacturing method of a flame-retardant and fire-resistant ship-used pair-twisted shielded instrument cable. Background technique

[0002] At present, fire-resistant twisted-pair shielded instrument 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 fire-resistant cables are wrapped with mica tapes overlapping outside the conductor. Due to the large number of cores in marine cables, wrapping with mica tapes will result in large outer diameter and heavy weight of the finished cable, which is not conducive to sh...

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