Drag chain cable concentric stranded conductor construction and interstrand adhesion test method

By designing a concentric stranded conductor structure, utilizing the annular convex surface and stress-dispersing inclined surface to disperse stress, and combining the interaction force of the extrusion sleeve and support wire, the problem of conductor wear and poor tensile strength in drag chain cables under high-intensity bending is solved, thereby improving the stability and durability of the cable.

CN122455445APending Publication Date: 2026-07-24CABLE MFG (SHANGHAI) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CABLE MFG (SHANGHAI) CO LTD
Filing Date
2026-05-11
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing drag chain cables are prone to localized stress concentration in conductors under high-intensity bending conditions, leading to wear and insulation layer rupture, and also have poor tensile strength.

Method used

The concentric stranded conductor structure is adopted. By setting an annular convex surface and a stress-dispersing inclined surface on the surface of the outer sheath, and embedding the extrusion sleeve and support wire, the central conductor and the outer conductor are fixed as a whole. The stress is dispersed by the interaction force of the extrusion sleeve and the inner groove. With the rotation of the cable chain shell, the outer sheath is bent, thus achieving stable fixation of the conductor.

Benefits of technology

It effectively prevents cable breakage during long-term operation, improves tensile strength, and ensures the stability and durability of the conductor during frequent bending movements.

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Abstract

The application discloses a concentric stranded conductor structure of a drag chain cable and a strand adhesion force testing method thereof, relates to the field of cable technology, and comprises a cladding outer skin, the outer surface of the cladding outer skin is provided with a plurality of annular convex surfaces, and the two sides of the plurality of annular convex surfaces are provided with force dispersion inclined surfaces for dispersing the stress of the annular convex surfaces; the cladding outer skin is provided with outer layer wires around the inner ring, the surface of the outer layer wires is provided with extrusion sleeves at positions aligned with the plurality of annular convex surfaces, the inner surface of the annular convex surface is provided with a plurality of inner grooves, the plurality of extrusion sleeves and the plurality of inner grooves are respectively and one-to-one embedded and clamped, a support wire is arranged in the gap formed between the adjacent two outer layer wires in the cladding outer skin, the support wire is extruded and abuts against the side surface of the extrusion sleeve, and a center wire is arranged in the middle of the cladding outer skin. The application avoids the deviation of the outer layer wires, makes the drag chain cable not easy to be damaged in a long period, and improves the tensile force between the conductor strands through the double extrusion of the external extrusion and the internal interaction force.
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Citation Information

Patent Citations

  • CN121617709A