A kind of steel wire armored power cable and its processing method

Abstract

The invention discloses a steel wire armored power cable and a processing method thereof. The steel wire armored power cable comprises a cable core. The cable core is provided with an inner lining layer, a steel wire armored layer and an outer sheath layer. The processing method of the steel wire armored power cable comprises the following steps of (1), firstly intertwisting 3-5 insulated wire cores and a filler for forming a cable core through cladding; (2), then wrapping the cable core by the inner lining layer through squeezing; (3), performing armoring, namely performing pre-armoring to the head end of the cable core, and performing supplementary armoring on the back end; and (4), performing pre-twisting of rotating by 3-4 cycles in a steel wire armoring direction when the head end of the outer sheath layer is pulled, keeping a certain tension on the back end and fixing the cable core for preventing untwisting. The steel wire armored power cable performs functions of totally eliminating twisting generated on the steel wire, and eliminating an inner stress of the armored steel wire. After armoring of the steel wire, deformation, loosening and irregularity caused by the inner stress after armoring of the steel wire are prevented. The front end and the back end of the wire core of the finished cable is not limited by an external force, and the effective length of the cable core is ensured through pre-armoring and supplementary armoring.

Description

technical field [0001] The invention relates to a power cable, in particular to a steel wire armored power cable and a processing method thereof. Background technique [0002] The current power cables generally do not use steel wires for armoring, resulting in low protection strength and easy damage. [0003] In addition, even if steel wire is used for armoring, the nominal diameter of the steel wire used is less than 2.5mm. Since the steel wire armor is mainly placed on the cage stranding machine for steel wire armoring, each pay-off reel of the cage stranding machine has a twist-back function. The steel wire does not twist during the armoring process, the production technology is relatively mature, and the product quality is guaranteed. However, when the nominal diameter of the armored steel wire is greater than or equal to 2.5mm, the outer diameter of the cable core is relatively large, and the size of the reel of the cage stranding machine cannot meet the requirements f...

AI Technical Summary

Problems solved by technology

[0005] 1. After the steel wire slider is put on the plate, it will be loose to varying degrees, and it is very easy to have parallel steel wires or excessive pitch (generally manufacturers use steel wire armored and wrapped with two layers of non-woven fabric, but the strength of the non-woven fabric is not enough) , there will be different degrees of damage due to mutual friction after being put on the plate, and it will have no effect on the fixing of the steel wire);

[0006] 2. When the steel wire is armored, due to the large internal stress of the steel wire, the cable core will have a serpentine shape after the head-end steel wire is armored on the plate;

[0007] 3. Improper handling of the end of the steel wire armor in the outer sheath, resulting in looser and looser steel wires

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