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

Abstract

The invention relates to a control 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 control cable insulated cores; a plurality of control cable insulated cores are stranded mutually to form a control cable core; the periphery of the control 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 control cable insulated core, so that gaps between the low-intensity non-woven fabric longitudinally-covered layer and the control 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 control cable, in particular to a flame-retardant and fire-resistant marine control cable. The invention also relates to a method for manufacturing a flame-retardant and fire-resistant marine control cable. Background technique [0002] At present, fire-resistant marine control 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 tapes on the outside of the conductor. Due to the large number of cores of marine electrical control cables, the use of mica tapes for wrapping will cause the outer diameter of the finished cable to be large and heavy, which is not conducive to the load of the ship. [0004] The remarkable feature of mineral insulated cable...

AI Technical Summary

Problems solved by technology

However, the gravitational force between the ceramizable silicone rubber molecules is small, and it has an amorphous structure, and its physical and mechanical properties are very poor. According to the provisions of "Wire", refractory glass fiber wire must be braided outside the silicone rubber insulation to enhance the mechanical properties, which makes the structure and production process of the finished cable complicated; and the high temperature water vapor resistance and acid and alkali resistance of silicone rubber are poor, which is not conducive to the ship's equipment. It is used in alkaline corrosion environment; in addition, silicone rubber is expensive and does not meet the economic requirements of the product

[0006] If the outer periphery of the control cable core is directly extruded with the inner sheath, the inner sheath will be bonded to the surface of the control cable insulated core, making it difficult to remove during construction, and it is easy to damage the control cable insulated core when cutting with an electrician's knife; Ordinary cables have a wrapping tape wrapped around the outer periphery of the control cable core along the circumferential direction of the control cable core. Since one wrapping tape is continuously wound along the circumferential direction of the control cable core, the tension of the wrapping tape is relatively large during winding. The wrapping tape between the insulated cores of the control cable is wound along the common tangent direction of the two control cable insulated cores, so there is a gap between the wrapping tape and the insulated core of the control cable. When the outer circumference of the tape is squeezed into the inner sheath, the gap around the inner side of the tape cannot be eliminated, and this gap can become a channel for the flame to spread forward

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