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CN-122025233-A - Submarine anti-corrosion cable and manufacturing method of reinforcing layer

CN122025233ACN 122025233 ACN122025233 ACN 122025233ACN-122025233-A

Abstract

The invention relates to the technical field of submarine cables, and provides a submarine anti-corrosion cable and a manufacturing method of a reinforcing layer, wherein the submarine anti-corrosion cable comprises a cable core group, an outer sheath and the reinforcing layer between the cable core group and the outer sheath; the reinforcing layer comprises an inner liner layer and an armor layer woven on the outer side of the inner liner layer, armor wires adopted by the armor layer are of a trapezoid cross-section structure with wide inner side and narrow outer side, the inner liner layer comprises a base layer of the innermost layer, a middle functional layer and an outermost conductive layer, and barb type embedded connection is formed between the inner structure of the armor layer and the conductive layer. The steel wire for weaving the armor layer is of an inner, middle and outer composite structure of a steel core, a copper-steel bonding layer and a corrosion-resistant layer, and can replace sensing optical fibers to monitor resistance change in real time.

Inventors

  • JIANG CHAO
  • JIANG MAOSHENG
  • PENG DA
  • LIU BO
  • WANG LEI
  • GAO JIAYUN

Assignees

  • 安徽宏源特种电缆股份有限公司

Dates

Publication Date
20260512
Application Date
20260330

Claims (10)

  1. 1. The submarine anti-corrosion cable is characterized by comprising a cable core group (1), an outer sheath (3) and a reinforcing layer (2) between the cable core group and the outer sheath; The reinforced layer (2) comprises an inner liner layer and an armor layer (24) woven on the outer side of the inner liner layer, armor wires adopted by the armor layer (24) are of trapezoid cross-section structures with wide inner side and narrow outer side, the inner liner layer comprises a base layer (21) of the innermost layer, a middle functional layer (22) and a conductive layer (23) of the outermost layer, and the inner structure of the armor layer (24) and the conductive layer (23) form barb type embedded connection; The conductive layer (23) has a normal operating state and a conductive heating operating state.
  2. 2. The submarine anticorrosive cable according to claim 1, wherein the armor layer (24) is of an inner, middle and outer composite structure, the center is a steel core (241), the middle is a copper-steel bonding layer (242), and the outer side is a corrosion-resistant layer (243).
  3. 3. The submarine anti-corrosion cable according to claim 2, wherein the steel core (241) is high-strength carbon steel, and is a trapezoid cross-section wire extending along the axial direction; The copper-steel bonding layer (242) is a transition layer for metallurgical bonding of copper and steel; The corrosion-resistant layer (243) is a copper-nickel alloy or a titanium alloy.
  4. 4. The submarine anticorrosive cable according to claim 3, wherein an inter-diffusion layer is formed between the copper-steel bonding layer (242) and the corrosion-resistant layer (243).
  5. 5. Submarine anticorrosive cable according to claim 1, characterized in that the base layer (21) is high density polyethylene with a radial thickness of 1.5-2.5 mm.
  6. 6. The submarine anticorrosive cable according to claim 5, wherein the base material of the functional layer (22) is high-density polyethylene, the functional layer (22) is uniformly filled with phase-change capsules (221) and magnetostrictive particles (222), the functional layer (22) is internally spirally wrapped with optical fibers (223), and the radial thickness of the functional layer (22) is 2-3.5 mm.
  7. 7. The submarine anticorrosive cable according to claim 6, wherein the conductive layer (23) is of a high-density polyethylene and carbon nanotube composite structure, and the radial thickness of the conductive layer (23) is 0.8-1.5 mm.
  8. 8. The submarine anticorrosive cable according to claim 7, wherein the radial thickness ratio of the base layer (21) to the functional layer (22) and the conductive layer (23) is 2:3:1.
  9. 9. The submarine anticorrosive cable according to claim 1, wherein the inner side of the outer sheath (3) is a braided braid (31), and the outer side of the outer sheath (3) is an elastomer (32).
  10. 10. A method for manufacturing a reinforcing layer of a cable, applied to a submarine anti-corrosion cable according to any one of claims 1 to 9, comprising the steps of: firstly, forming a base layer (21), a functional layer (22) and a conductive layer (23) on the outer side of a cable core group (1) in a three-layer coextrusion mode; step two, uniformly mixing phase-change capsules (221) and magnetostriction particles (222) into a substrate of high-density polyethylene in the extrusion process of the functional layer (22); step three, embedding an optical fiber (223) in the functional layer (22) in a guide wheel guiding manner in the extrusion process of the functional layer (22) so as to enable the optical fiber (223) to be wrapped in the spiral direction; Step four, after the conductive layer (23) is extruded and molded, weaving an armor layer (24) on the outer side of the conductive layer (23) by adopting trapezoidal armor wires; step five, conducting electricity to the conducting layer (23) to enable the conducting layer to be hot-melted after the armor layer (24) is woven and formed, softening the body after the conducting layer is hot-melted, and then shrinking the armor layer (24) to enable the dovetail bulge structure on the inner side of the armor layer to be embedded into the conducting layer (23); And step six, after the armor layer (24) is embedded into the conductive layer (23), cooling the conductive layer (23) to shape.

Description

Submarine anti-corrosion cable and manufacturing method of reinforcing layer Technical Field The invention relates to the technical field of submarine cables, in particular to a submarine anti-corrosion cable and a manufacturing method of a reinforcing layer. Background The submarine cable is mainly used for offshore wind power, island interconnection, a national power grid and other scenes, and is used for bearing electric energy transmission and communication functions; The submarine cables are mainly divided into two types, wherein the power submarine cables are used for connecting offshore wind power, drilling platforms and other facilities with land power grids; in addition, the photoelectric composite submarine cable integrates the power transmission and communication functions, and meets the multifunctional requirements under complex environments such as offshore wind power, oil-gas platforms and the like through the structural designs of multilayer insulation, shielding, armoured mechanical protection and the like, and the cable is mostly used for middle-short distance offshore engineering, and the transoceanic communication is still mainly carried out by independent communication submarine cables; At present, an armor layer of the submarine cable is made of steel wires, an inner liner layer is made of plastics, the difference of the materials of the armor layer and the inner liner layer is large, when the cable is extruded or bent laterally, the armor layer and the inner liner layer are easily separated from each other, local stress concentration occurs, buckling deformation occurs, and when the inner liner layer is seriously punctured, internal insulation is broken; In order to solve the problems, the application provides a submarine anti-corrosion cable and a manufacturing method of a reinforcing layer. Disclosure of Invention The invention aims to provide a submarine anti-corrosion cable and a manufacturing method of a reinforcing layer, which solve the problem that stress concentration is easily caused by mutual separation due to small connecting force of the inner structure section of the cable in the prior art. In order to solve the technical problems, the invention is realized by the following technical scheme: A submarine anti-corrosion cable comprises a cable core group, an outer sheath and a reinforcing layer between the cable core group and the outer sheath; The reinforced layer comprises an inner liner layer and an armor layer woven on the outer side of the inner liner layer, armor wires adopted by the armor layer are of trapezoid cross-section structures with wide inner side and narrow outer side, the inner liner layer comprises a base layer of the innermost layer, a middle functional layer and a conductive layer of the outermost layer, and barb type embedded connection is formed between the inner structure of the armor layer and the conductive layer; The conductive layer has a normal working state and a conductive heating working state. A method for manufacturing a reinforcing layer of a cable comprises the following steps: Step one, forming a base layer, a functional layer and a conductive layer on the outer side of a cable core group in a three-layer coextrusion mode; Step two, uniformly mixing phase-change capsules and magnetostriction particles into a substrate of the high-density polyethylene in the extrusion process of the functional layer; Step three, embedding optical fibers into the functional layer in a guide wheel guiding manner in the extrusion process of the functional layer, so that the optical fibers are wrapped in the spiral direction; step four, after the conductive layer is extruded and molded, weaving an armor layer on the outer side of the conductive layer by adopting trapezoidal armor wires; Step five, conducting electricity to the conductive layer to enable the conductive layer to be hot-melted after the armor layer is woven and formed, softening the body after the hot-melting, and then shrinking the armor layer to enable the dovetail bulge structure on the inner side of the armor layer to be embedded into the conductive layer; and step six, cooling the conductive layer to shape after the armor layer is embedded into the conductive layer. The invention has the beneficial effects that: 1. Through the embedded connection formed between the trapezoid cross section structure of the steel wire in the armor layer and the conductive layer, the inner liner layer and the armor layer form a mechanical interlocking structure, so that a contact surface in side pressure can be converted from point or line contact to surface contact, the relative sliding between the two layers of structures can be eliminated, and the problem of easy breakage caused by stress concentration is solved; 2. The inner, middle and outer composite structures of the armoured wires of the armoured layer are utilized to form a film strain sensitive structure by utilizing the copper-nickel alloy on the su