Manufacturing method of a hoisting cable with small diameter, high strength, and high flexibility

Patent metadata

Field	Value
Publication number	US-11749424-B2
Application number	US-202117168679-A
Country	US
Kind code	B2
Filing date	Feb 5, 2021
Priority date	Feb 21, 2020
Publication date	Sep 5, 2023
Grant date	Sep 5, 2023

Abstract

The present disclosure discloses a hoisting cable with small diameter, high strength, and high flexibility, including an inner conductive core, an insulating layer, an outer conductive wire layer, a tensile layer, and an outer protective layer. The insulating layer is located at an outer side of the inner conductive core and provides insulation between the inner and outer conductors; the outer conductive wire layer is located at an outer side of the insulating layer; the tensile layer is located at an outer side of the outer conductive wire layer; and the outer protective layer is located at an outer side of the tensile layer. The high tensile strength can ensure the safety of hoisting operations, and the small diameter, small bend radius, and high flexibility can ensure the minimization design and the large rope capacity of a winch.

First claim

What is claimed is:

1. A manufacturing method of a hoisting cable with small diameter, high strength, and high flexibility, comprising:
normally twisting 37 silver-plated copper wires in a layered form to obtain an inner conductive core, wherein, 1 silver-plated copper wire is arranged as a central wire in a first structural layer; 6 silver-plated copper wires are arranged in a second structural layer, and normal twisting is conducted in a left direction; 12 silver-plated copper wires are arranged in a third structural layer, and normal twisting is conducted in a right direction; and 18 silver-plated copper wires are arranged in a fourth structural layer, and normal twisting is conducted in the left direction;
preheating the obtained inner conductive core, extruding FEP with a high-temperature extruder, coating extruded FEP on a preheated inner conductive core, and cooling with hot water at 80° C. to 90° C. to obtain an insulating layer;
weaving silver-plated copper wires outside the obtained insulating layer in the following manner: 16 spindles×4 wires/spindle×diameter of 0.18 mm to obtain an outer conductive wire layer (3), wherein, the silver-plated copper wires are woven at a weaving pitch of 21 mm to 25 mm;
weaving a Vectran aramid fiber mesh outside the obtained outer conductive wire layer to obtain a tensile layer (4), wherein, aramid fibers are woven at a constant tension, a weaving pitch of 80 mm to 90 mm, and a weaving angle of 10° in the following manner: 24 spindles×2 strands/spindle; and

wrapping the obtained tensile layer with a polyimide film coated with tetrafluoroethylene-hexafluoropropylene copolymer, and after the wrapping is completed, fusing the polyimide film at 400° C. and cooling to obtain an outer protective layer.

Assignees

• Univ Jilin

Inventors

• Zhang Nan
• Liu Hui
• Sun Youhong
• Talalay Pavel
• Wang Ting
• Fan Xiaopeng
• Li Bing
• Wang Rusheng
• Gong Da
• Liu Yunchen
• Yang Yang
• Hong Jialin
• Liu An
• Chen Yanji

Classifications

• Y02A30/14

  Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables · CPC title

• H01B7/1865 Primary

  Sheaths comprising braided non-metallic layers · CPC title

• H01B7/04 Primary

  Flexible cables, conductors, or cords, e.g. trailing cables · CPC title

• H01B13/14

  by extrusion {(extrusion in general B29C48/00)} · CPC title

• H01B13/34

  for marking conductors or cables · CPC title