Manufacturing method of high-flexibility tensile cable

Abstract

The invention relates to the field of cables, and discloses a manufacturing method of a high-flexibility tensile cable. The method comprises the following steps of 1) preparing a conductor, namely stranding a drawn copper filament bundle into the conductor; 2) preparing a wire group, namely extruding ethylene-propylene rubber on the conductor to form an insulating layer so as to obtain insulating wire cores, twisting two insulating wire cores, wrapping an inner polyester belt layer after twisting, and externally arranging an inner reinforcing braid layer outside the inner polyester belt layer so as to obtain the wire group; 3) preparing a cable core, namely cabling the multiple wire groups, placing a reinforced steel wire rope in the middle, and after the wire groups are spirally wound on the reinforced steel wire rope, wrapping an outer polyester belt layer at the periphery to obtain the cable core; and 4) coating, namely arranging an outer reinforced braid outside the cable core, and then extruding chlorosulfonated polyethylene rubber outside the outer reinforced braid to form a sheath layer to obtain a finished product, wherein the inner reinforced braid layer and the outer reinforced braid layer are both formed by weaving polyester yarns and copper wires in a staggered manner. The cable manufactured by the invention has high flexibility and tensile strength, and is suitable for the situation of large vertical fall.

Description

technical field [0001] The invention relates to the field of cables, in particular to a method for manufacturing a highly flexible tensile cable. Background technique [0002] Cables are widely used in modern infrastructure construction, digital interconnection, rail transit, information transmission and other fields, and the application scenarios and application requirements are different. When the cables are laid in places with a large vertical drop such as cable shafts and lifting equipment, the cables bear a large longitudinal tensile load and sometimes need to reciprocate up and down with the equipment. This requires the cable not only to have greater longitudinal tensile resistance, but also to have high flexibility to avoid cable damage caused by greater mechanical loads and fatigue damage. [0003] At present, cables on the market usually use polyethylene, cross-linked polyethylene, polyvinyl chloride, silicone rubber, etc. as insulation layers. However, polyethyle...

AI Technical Summary

Problems solved by technology

However, polyethylene and polyvinyl chloride are thermoplastic materials, which are prone to creep under the action of long-term current load and longitudinal tensile load, resulting in insulation cracking, breaking and thinning, etc. Fatigue cracking is easy to occur during long-term reciprocating motion; silicone rubber has good flexibility, but its own strength is low and tear resistance is poor, and it is easy to break under the action of longitudinal tensile load

The above situations will reduce the insulation level of the cable, and even lead to the occurrence of short-circuit breakdown, directly affecting the service life of the cable

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