Steel tape armored medium-voltage power cable

Abstract

The invention relates to the technical field of cables, in particular to a steel tape armored medium-voltage power cable, which comprises three conductive units with circular cross sections, and the three conductive units are formed by winding every two cable cores tangent to each other by a wrapping tape; the filling layer is filled between the cable cores and the wrapping tape; the inner lining layer, the steel tape armoring layer and the outer sheath are sequentially arranged on the outer side of the wrapping tape; wherein a seam protection strip is arranged between the steel tape armoring layer and the outer sheath, the seam protection strip wraps the seam of the steel tape armoring layer and is used for limiting the movement range of the steel tape at the seam, and a hot melt adhesive layer is arranged on the inner side of the seam protection strip and can be melted and adhered to the seam of the steel tape to achieve a good sealing effect. And the combination of the seam protection strip and the hot melt adhesive layer can play a role in limiting and buffering the position of the side edge of the seam of the steel belt, so that the seam protection strip or the outer sheath is prevented from being cut by the steel belt.

Description

technical field [0001] The invention relates to the technical field of electric wires and cables, in particular to a steel tape armored medium-voltage power cable. Background technique [0002] The mechanical protection layer of the armored cable can be added to the cable, including copper tape, steel tape, and aluminum tape armored structure to increase the mechanical strength of the cable and improve the corrosion resistance. The wires and cables designed in different regions can be laid in a variety of ways. [0003] At present, the steel tape armored structure of the steel tape armored cable is formed by wrapping the steel tape, and the steel tapes are overlapped at the seams. The sliding will produce transverse shearing between each other, resulting in scratches on the sheath, or there are flashes and gaps at the edge of the steel strip, which will cause the steel strip to be scratched or cut into the sheath to injure the sheath. SUMMARY OF THE INVENTION [0004] In...

AI Technical Summary

Problems solved by technology

[0003] At present, the steel tape armor structure of steel tape armored cables is formed by wrapping steel tapes. The steel tapes overlap each other at the seams. Sliding will generate transverse shear between each other, causing the sheath to be scratched, or there will be flashes and gaps at the edge of the steel strip, which will cause the steel strip to scratch or cut into the sheath to damage the sheath

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