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CN-122025245-A - High-tensile towing cable for ocean engineering and preparation method thereof

CN122025245ACN 122025245 ACN122025245 ACN 122025245ACN-122025245-A

Abstract

The invention relates to the technical field of ocean engineering special cables, and discloses a high-tensile towing cable for ocean engineering and a preparation method thereof. The cable sequentially comprises a cable core, an inner sheath, a gradient composite tensile layer, a segmented functional protective layer and an outer sheath from inside to outside, wherein the gradient composite tensile layer is tightly coated outside the inner sheath and comprises an inner layer and an outer layer, the inner layer is a high-modulus fiber woven layer, the outer layer is a metal and fiber composite woven layer, the segmented functional protective layer is coated outside the gradient composite tensile layer and is divided into two sections with different structures along the length direction of the cable, namely a top section used close to a water surface and a bottom section used for a deep water area, the top section adopts a corrugated composite protective layer structure, and the bottom section adopts a smooth bonding protective layer structure. The cable provided by the invention realizes unification of high tensile strength, excellent dynamic bending fatigue performance and high hydrostatic pressure crushing resistance, and solves the problem that a single-structure cable cannot adapt to full sea depth working conditions.

Inventors

  • LI ZHENJIANG
  • SHANG YU
  • HU XIANGHUA
  • LI WENJUAN
  • LI YUJING
  • GAO SHUAI

Assignees

  • 湖南华菱线缆股份有限公司

Dates

Publication Date
20260512
Application Date
20260414

Claims (9)

  1. 1. The high-tensile towing cable for the ocean engineering is characterized by sequentially comprising a cable core, an inner sheath, a gradient composite tensile layer, a sectional functional sheath and an outer sheath from inside to outside; The gradient composite tensile layer is tightly coated outside the inner sheath and comprises an inner layer and an outer layer, wherein the inner layer is a high-modulus fiber braiding layer, and the outer layer is a metal and fiber composite braiding layer; the sectional functional protective layer is coated outside the gradient composite tensile layer and is divided into two sections with different structures along the length direction of the cable, namely a top section used close to the water surface and a bottom section used in a deepwater area, wherein the top section adopts a corrugated composite protective layer structure, and the bottom section adopts a smooth bonding protective layer structure.
  2. 2. The high tensile hauling cable for ocean engineering according to claim 1, wherein the cable core comprises a nonmetallic center filling member and a plurality of functional units stranded around the nonmetallic center filling member, wherein the functional units comprise a power line unit, an optical fiber unit and a signal unit, the nonmetallic center filling member is made of a composite material of high-density polyethylene and chopped carbon fibers, and the mass content of the chopped carbon fibers in the composite material of high-density polyethylene and chopped carbon fibers is 20-35%.
  3. 3. The high tensile hauling cable for ocean engineering according to claim 1 or 2, wherein in the gradient composite tensile layer, the inner layer is formed by mixed braiding of para-aramid fiber and PBO fiber, and the braiding angle is 18-22 °; And/or the outer layer is formed by jointly weaving ultra-high molecular weight polyethylene fiber bundles and stainless steel microfilaments and is completely coated outside the inner layer.
  4. 4. The high tensile towing cable for ocean engineering according to claim 1 or 2, wherein in the sectional functional sheath, the corrugated composite sheath structure of the top section comprises longitudinally wrapped corrugated copper strips, an extruded elastic inner liner layer and a woven high elastic nylon wire mesh in sequence from inside to outside; the smooth bonding protection layer structure of the bottom section comprises a longitudinally-wrapped smooth copper strip and a modified polyolefin adhesive layer extruded outside the smooth copper strip; the top section and the bottom section are connected through a transitional sealing connection section, the transitional sealing connection section is made of waterproof insulating glue through injection molding, and lap joint, sealing and stress conical transition of the two-section structure are achieved.
  5. 5. The high tensile towing cable for ocean engineering according to claim 4, wherein the elastic lining layer comprises, by weight, 100 parts of chlorinated polyethylene, 20-25 parts of epoxidized trans-1, 4-polyisoprene, 8-12 parts of liquid polysulfide rubber, 3-5 parts of modified organic montmorillonite, 5-8 parts of basalt fiber, 4-6 parts of microencapsulated phase change wax, 3 parts of antioxidant and 1-2 parts of lubricant.
  6. 6. A method of producing the high tensile haulage cable for ocean engineering according to any one of claims 1 to 5, comprising the steps of: S1, preparing a cable core and extruding an inner sheath; s2, braiding a gradient composite tensile layer, namely braiding a high-modulus fiber braiding layer of an inner layer and a metal and fiber composite braiding layer of an outer layer on the inner sheath in sequence; S3, preparing a sectional functional protective layer, namely forming a top section and a bottom section on the cable body of the woven gradient composite tensile layer respectively, wherein the top section adopts a corrugated composite protective layer structure, and the bottom section adopts a smooth bonding protective layer structure; and S4, integrally extruding an outer sheath outside the sectional functional protective layer.
  7. 7. The method according to claim 6, wherein in step S3, the corrugated composite sheath structure of the top section includes, in order from inside to outside, a longitudinally wrapped corrugated copper tape, an extruded elastic inner liner layer, and a woven high-elasticity nylon wire, and the step of preparing the elastic inner liner layer of the top section includes: S31, mixing chlorinated polyethylene, modified organic montmorillonite, basalt fiber, an antioxidant and a lubricant at 120-130 ℃ to obtain a mixture I; s32, carrying out in-situ reaction on the mixture I, liquid polysulfide rubber and epoxidized trans-1, 4-polyisoprene at 145-155 ℃ to obtain a mixture II; s33, uniformly mixing the mixture II and the microencapsulated phase change wax at 150-160 ℃ to obtain a mixture III; And S34, discharging glue from the mixture III, tabletting and curing, and extruding and packaging after the elastic lining layer is obtained.
  8. 8. The method according to claim 6, wherein in step S3, the top section and the bottom section are connected by a transitional sealing connection section, and the transitional sealing connection section is formed by overlapping the tail end of the top section and the head end of the bottom section, placing the overlapping sections in a mold, injecting molten waterproof insulating glue, and cooling to form a sealing body with a stress cone-shaped transitional structure.
  9. 9. The method of claim 6, wherein braiding the metal and fiber composite braid of the outer layer in step S2 comprises braiding ultra-high molecular weight polyethylene fiber bundles with stainless steel micro-wires having a diameter of 0.05-0.08 mm.

Description

High-tensile towing cable for ocean engineering and preparation method thereof Technical Field The invention relates to the technical field of ocean engineering special cables, in particular to a high-tensile towing cable for ocean engineering and a preparation method thereof. Background With the continuous development of marine resource exploration, scientific investigation and underwater engineering operation, the performance requirements of a towing cable for connecting a water surface ship with underwater equipment are increasingly severe. Such cables work for a long period in complex marine environments and must withstand significant axial tension, frequent bending and torsional loads, and penetration and corrosion of high pressure seawater in addition to the power transmission and signal communication functions. In order to improve the tensile property of the cable, the prior art mainly adopts the following modes: The armor reinforcement adopts high-strength steel wires or aramid fibers for weaving or armor as a main bearing element. However, the metal armor is easy to fatigue and damage under dynamic bending, and the single fiber armor is easy to be extruded and deformed under high pressure, so that the inner wire core is damaged. And the central reinforcing part is that a steel wire rope or a fiber reinforced rod is arranged in the center of the cable and used as a bearing framework. The mode can occupy the space of the cable core, is unfavorable for the composite transmission of multiple functions (electricity, light, liquid and the like), and the center piece and the peripheral functional units are easy to generate relative displacement during bending due to the difference of mechanical properties, so that the internal abrasion is accelerated. The structure is optimized, such as setting a tensile layer (such as an aramid woven layer) made of single material or adopting a special twisting mode. Such structures tend to have limited lateral pressure protection against the cable and insufficient co-deformation with other components. In addition, the existing trailing cable is generally communicated in a whole process by adopting a single structure, and is difficult to adapt to different working conditions of sections with different water depths. In the "overhanging section" near the water surface, the cable is frequently bent by wave action, requiring the structure to have excellent fatigue resistance, while in the "bottom section" of the deep water region, the cable is mainly subjected to extremely high hydrostatic pressure, requiring the structure to have excellent crushing resistance and permeation resistance. The current technical solution has difficulty in achieving optimal unification of the two performances on the same cable. Therefore, development of a novel ocean towed cable is needed to meet the complex requirements of modern ocean engineering operation, wherein the novel ocean towed cable has excellent dynamic fatigue adaptability, deep water compression resistance, high reliability and good functional integration while guaranteeing high tensile strength. Disclosure of Invention The invention aims to solve the problems that the existing trailing cable is difficult to ensure high tensile strength and simultaneously has excellent bending fatigue resistance required by a near water section and high hydrostatic crushing resistance required by a deep water section due to the adoption of a single through structure. In order to achieve the above purpose, the first aspect of the present invention provides a high tensile towing cable for ocean engineering, which sequentially comprises a cable core, an inner sheath, a gradient composite tensile layer, a segmented functional sheath and an outer sheath from inside to outside; The gradient composite tensile layer is tightly coated outside the inner sheath and comprises an inner layer and an outer layer, wherein the inner layer is a high-modulus fiber braiding layer, and the outer layer is a metal and fiber composite braiding layer; the sectional functional protective layer is coated outside the gradient composite tensile layer and is divided into two sections with different structures along the length direction of the cable, namely a top section used close to the water surface and a bottom section used in a deepwater area, wherein the top section adopts a corrugated composite protective layer structure, and the bottom section adopts a smooth bonding protective layer structure. The second aspect of the invention provides a method for preparing the high-tensile towing cable for ocean engineering, which comprises the following steps: S1, preparing a cable core and extruding an inner sheath; s2, braiding a gradient composite tensile layer, namely braiding a high-modulus fiber braiding layer of an inner layer and a metal and fiber composite braiding layer of an outer layer on the inner sheath in sequence; S3, preparing a sectional functional protective layer