WO2021184771A1 - 海底光缆奇数不等径钢丝复合铜管一体化拱形内铠结构 - Google Patents

海底光缆奇数不等径钢丝复合铜管一体化拱形内铠结构 Download PDF

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WO2021184771A1
WO2021184771A1 PCT/CN2020/125741 CN2020125741W WO2021184771A1 WO 2021184771 A1 WO2021184771 A1 WO 2021184771A1 CN 2020125741 W CN2020125741 W CN 2020125741W WO 2021184771 A1 WO2021184771 A1 WO 2021184771A1
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steel wire
steel
steel wires
layer
copper pipe
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PCT/CN2020/125741
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English (en)
French (fr)
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胥国祥
许人东
张超
范明海
刘斌
李涛
王畅
于文慧
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江苏亨通海洋光网系统有限公司
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Publication of WO2021184771A1 publication Critical patent/WO2021184771A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401—Optical cables
    • G02B6/4429—Means specially adapted for strengthening or protecting the cables
    • G02B6/443—Protective covering
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401—Optical cables
    • G02B6/4415—Cables for special applications
    • G02B6/4427—Pressure resistant cables, e.g. undersea cables

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  • the invention relates to a submarine optical cable, in particular to an integrated arched inner armor structure of a submarine optical cable with an odd-numbered unequal-diameter steel wire composite copper pipe.
  • Lightweight submarine optical cables (LW) used in the deep sea mainly rely on the inner armor to withstand mechanical external forces, including tensile, impact, flattening, repeated bending and other loads generated by the submarine optical cable during manufacturing, storage, transportation, laying, operation, maintenance and recovery.
  • the inner armor needs to provide the best protection for the central optical unit to ensure the 25-year high-reliability transmission performance of the submarine optical cable.
  • the application depth of submarine optical cables continues to increase, especially in the trans-Pacific submarine optical cable system, the typical application depth has reached 8,000 meters, and the extreme application depth exceeds 10,000 meters. When the relay submarine optical cable is laid and recovered, it will be in the submarine cable.
  • the inner armor of the traditional submarine optical cable adopts equal-diameter steel wire stranded, and the water-blocking tape is wrapped, and the mechanical performance of the submarine cable is limited.
  • the purpose of the present invention is to provide an integrated arched inner armor structure of a submarine optical cable with odd-numbered unequal diameter steel wire composite copper pipe.
  • an integrated arched inner armor structure of a submarine optical cable with odd-numbered unequal diameter steel-plastic composite copper pipes which includes a steel wire layer sheathed outside the stainless steel tube and a steel wire layer sheathed outside the steel wire layer
  • the steel wire layer is formed by three steel wires with different outer diameters, the first steel wire, the second steel wire, and the third steel wire, which are distributed and twisted in a circular array around the axis of the stainless steel pipe, and the number of steel wires of each outer diameter is an odd number
  • the outer diameters of the first steel wire, the second steel wire, and the third steel wire are sequentially reduced, the first steel wire is arranged in the inner layer of the steel wire layer, and the second steel wire and the third steel wire are arranged on the steel wire layer
  • the outer layer is arranged at intervals, the adjacent first steel wires are tangent to each other, and the diameter of the tangent circle inside all the first steel wires is larger than the outer diameter of the stainless steel pipe
  • the first steel wire, the second steel wire and the third steel wire are all high-strength phosphated steel wires, which greatly improves the tensile performance of the submarine optical cable.
  • the copper tube is a seamless copper tube drawn after seamless welding with three-gun argon arc welding, and the inner wall of the copper tube is embedded in the gap between the third steel wire and the second steel wire, Form an integrated inner armor structure of steel wire layer and copper tube.
  • the integrated structure further reduces the steel wire gap, makes the structure strong and compact, and greatly improves the mechanical performance of the submarine optical cable.
  • the copper tube is a three-gun argon arc welding seamlessly welded one-piece drawn copper tube. High strength and good water resistance.
  • the present invention uses an odd number of three unequal-diameter steel wires stranded, and the composite copper pipe forms an integrated inner armor structure, reduces the steel wire gap, optimizes the load transmission form, and forms an "arched" structure , which greatly improves the tensile, impact and flattening performance of the submarine optical cable.
  • the use of three unequal-diameter steel wire strands significantly increases the proportion of steel wire volume compared to the equal-diameter steel wire strand structure. Under the premise of the same cross-sectional area of the cable bearing member, the tensile performance of the submarine cable is greatly improved.
  • Fig. 1 is a schematic diagram of the cross-sectional structure of the present invention.
  • stainless steel pipe 2. copper pipe, 3. second steel wire, 4. third steel wire, 5. first steel wire.
  • Embodiment an integrated arched inner armor structure of a submarine optical cable with odd-numbered unequal-diameter steel wire composite copper pipe, which includes a steel wire layer sheathed outside the stainless steel tube 1 and a copper tube 2 sheathed outside the steel wire layer, and the steel wire layer consists of
  • the first steel wire 5, the second steel wire 3, and the third steel wire 4 are formed by three steel wires with different outer diameters distributed and twisted in a circular array around the axis of the stainless steel pipe 1.
  • the number of steel wires of each outer diameter is an odd number. 5.
  • the outer diameters of the second steel wire 3 and the third steel wire 4 are sequentially reduced.
  • the first steel wire 5 is arranged in the inner layer of the steel wire layer, and the second steel wire 3 and the third steel wire 4 are arranged on the steel wire.
  • the outer layer of the first steel wire 5 is arranged at intervals, and the adjacent first steel wires 5 are tangent to each other, and the diameter of the inner tangent circle of all the first steel wires 5 is larger than the outer diameter of the stainless steel tube 1, that is, the first steel wires 5 and There is a gap between the outer walls of the stainless steel pipe 1, and the outer wall of the inner layer of the steel wire layer is in close contact with the inner wall of the outer layer of the steel wire layer.
  • the composite copper tube 2 forms an integrated inner armor structure, which reduces the steel wire gap, optimizes the load transmission form, and forms an "arch" structure, which greatly improves the submarine optical cable The tensile performance, impact resistance and flattening performance of the product.
  • the first steel wire 5, the second steel wire 3, and the third steel wire 4 are all high-strength phosphating steel wires, which greatly improves the tensile performance of the submarine optical cable.
  • the inner wall of the copper tube 2 is embedded in the gap between the third steel wire 4 and the second steel wire 3. The integrated structure further reduces the steel wire gap, makes the structure strong and compact, and greatly improves the mechanical performance of the submarine optical cable.
  • the copper tube 2 is an integrated drawn copper tube 2 seamlessly welded by three-gun argon arc welding. High strength and good water resistance.
  • a typical light submarine optical cable was developed according to the present invention.
  • the stainless steel tube 1 has an outer diameter of 3.2mm
  • the first steel wire 5 has an outer diameter of 1.68mm
  • the third steel wire 42 has an outer diameter of 1.10mm
  • the second steel pipe has an outer diameter of 1.10mm.
  • the outer diameter of the steel wire 3 is 1.50mm
  • the copper tube 2 with a certain thickness is adopted.
  • the final submarine cable diameter is only 18mm, which achieves the following effects:
  • the minimum breaking load (UTS) of the submarine optical cable is 95kN, which can meet the requirements of laying a repeater with a recovery water depth of more than 8000 meters.
  • the submarine optical cable can withstand the flattening load of 20kN and the impact resistance of 200J, which can ensure that the submarine cable can withstand the impact and flattening load that may occur during the full life cycle, protect the central optical unit, and ensure the transmission performance of the submarine cable.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Insulated Conductors (AREA)
  • Communication Cables (AREA)

Abstract

一种海底光缆奇数不等径钢丝复合铜管一体化拱形内铠结构，包括铜管（2），钢丝层由第一钢丝（5）、第二钢丝（3）、第三钢丝（4）三种不同外径的钢丝绕不锈钢管（1）轴线环形阵列分布并绞合而成，每种外径的钢丝数量为奇数，第一钢丝（5）、第二钢丝（3）、第三钢丝（4）外径依次减小，第一钢丝（5）设置于钢丝层内层，第二钢丝（3）和第三钢丝（4）设置于钢丝层外层且相互间隔排列，第一钢丝（5）相邻之间彼此相切，第一钢丝（5）与不锈钢管（1）外壁之间存在间隙，钢丝层内层的外壁与钢丝层外层的内壁紧贴。采用奇数根三种不等径钢丝绞合，复合铜管（2）形成一体化式内铠结构，降低钢丝间隙，优化了载荷传递形式，并形成"拱形"结构，大幅提升了海底光缆的抗拉伸性能，抗冲击、压扁性能。

Description

海底光缆奇数不等径钢丝复合铜管一体化拱形内铠结构 技术领域
本发明涉及海底光缆，特别涉及海底光缆奇数不等径钢丝复合铜管一体化拱形内铠结构。
背景技术
应用于深海的轻型海底光缆(LW)，主要依靠内铠承受机械外力，包括海底光缆在制造、储存、运输、敷设、运行及维修回收时产生的拉伸、冲击、压扁、反复弯曲等载荷，同时内铠需对中心光单元起到最好的保护作用，保证海底光缆25年的高可靠传输性能。随着海底光缆应用水深不断加大，尤其是在跨太平洋海底光缆系统中，典型应用水深已达到8000米，极端应用水深超过10000米，有中继海底光缆在敷设和回收时，会在海缆上产生巨大的张力，对内铠的机械性能提出了极为苛刻的要求。传统海底光缆内铠采用等径钢丝绞合，阻水带绕包形式，海缆机械性能受到限制。
发明内容
针对现有技术的不足，本发明的目的是提供海底光缆奇数不等径钢丝复合铜管一体化拱形内铠结构。
本发明解决其技术问题所采用的技术方案是：海底光缆奇数不等径钢塑复合铜管一体化拱形内铠结构，其包括套在不锈钢管外的钢丝层和套在所述钢丝层外的铜管，所述钢丝层由第一钢丝、第二钢丝、第三钢丝三种不同外径的钢丝绕不锈钢管轴线环形阵列分布并绞合而成，每种外径的钢丝数量为奇数，所述第一钢丝、第二钢丝、第三钢丝外径依次减小，所述第一钢丝设置于所述钢丝层内层，所述第二钢丝和所述第三钢丝设置于所述钢丝层外层且相互间隔排列，第一钢丝相邻之间彼此相切，所有所述第一钢丝内侧相切的圆直径大于所述不锈钢管外径，即所述第一钢丝与所述不锈钢管外壁之间存在间隙，所述的钢丝层内层的外壁与钢丝层外层的内壁紧贴。
上述设计中采用奇数根三种不等径钢丝绞合，复合铜管形成一体化式内铠结构，使得缆线结实紧密，降低钢丝间隙，优化了载荷传递形式，并形成“拱形”结构，大幅提升了海底光缆的抗拉伸性能，抗冲击、压扁性能。
作为本设计的进一步改进，所述第一钢丝、第二钢丝以及第三钢丝均为高强度磷化钢丝，大幅提升海光缆抗拉伸性能。
作为本设计的进一步改进，所述铜管为三枪氩弧焊进行无缝焊接后拉拔而成的无缝铜管，所述铜管的内壁嵌入到第三钢丝和第二钢丝间隙中，形成钢丝层、铜管一体化的内铠结构。一体化结构，进一步降低钢丝间隙，使得结构结实、紧密，大幅提升了海底光缆的机械性能。
作为本设计的进一步改进，所述铜管为三枪氩弧焊无缝焊接一体拉拔式铜管。强度高，阻水性好。
本发明的有益效果是：本发明采用奇数根三种不等径钢丝绞合，复合铜管形成一体化式的内铠结构，降低钢丝间隙，优化了载荷传递形式，并形成“拱形”结构，大幅提升了海底光缆的抗拉伸性能，抗冲击、压扁性能。采用三种不等径钢丝绞合，相比于等径钢丝绞合结构，显著提高了钢丝体积占比，在同等缆承力件截面积的前提下，大幅提升了海缆抗拉伸性能，采用奇数根三种不等径钢丝绞合，从截面上看，总能保证第一钢丝在受侧压力力时，其对位总有两根第一钢丝承力，优化了冲击压扁载荷传递形式，提升了海缆抗冲击、压扁性能。
附图说明
下面结合附图和实施例对本发明进一步说明。
图1是本发明的横截面结构示意图。
在图中1.不锈钢管，2.铜管，3.第二钢丝，4.第三钢丝，5.第一钢丝。
具体实施方式
下面将结合附图以及具体实施例来详细说明本发明，其中的示意性实施例以及说明仅用来解释本发明，但并不作为对本发明的限定。
实施例：海底光缆奇数不等径钢丝复合铜管一体化拱形内铠结构，其包括套在不锈钢管1外的钢丝层和套在所述钢丝层外的铜管2，所述钢丝层由第一钢丝5、第二钢丝3、第三钢丝4三种不同外径的钢丝绕不锈钢管1轴线环形阵列分布并绞合而成，每种外径的钢丝数量为奇数，所述第一钢丝5、第二钢丝3、第三钢丝4外径依次减小，所述第一钢丝5设置于所述钢丝层内层，所述第二钢丝3和所述第三钢丝4设置于所述钢丝层外层且相互间隔排列，第一钢丝5相邻之间彼此相切，所有所述第一钢丝5内侧相切的圆直径大于所述不锈钢管1外径，即所述第一钢丝5与所述不锈钢管1外壁之间存在间隙，所述的钢丝层内层的外壁与钢丝层外层的内壁紧贴。
上述设计中采用奇数根三种不等径钢丝绞合，复合铜管2形成一体化式内铠结构，降低钢丝间隙，优化了载荷传递形式，并形成“拱形”结构，大幅提升了海底光缆的抗拉伸性能，抗冲击、压扁性能。
作为本设计的进一步改进，所述第一钢丝5、第二钢丝3以及第三钢丝4均为高强度磷化钢丝，大幅提升海光缆抗拉伸性能。作为本设计的进一步改进，所述铜管2的内壁嵌入到第三钢丝4和第二钢丝3间隙中。一体化结构，进一步降低钢丝间隙，使得结构结实、紧密，大幅提升了海底光缆的机械性能。
作为本设计的进一步改进，所述铜管2为三枪氩弧焊无缝焊接一体拉拔式铜管2。强度高，阻水性好。
具体的根据本发明开发出一款典型轻型海底光缆(LW)，不锈钢管1外径为3.2mm，第一钢丝5一外径为1.68mm，第三钢丝4二外径为1.10mm，第二钢丝3三外径为1.50mm，采用一定厚度壁厚的铜管2，最终海缆直径仅为18mm，达到如下效果：
1.海底光缆最小断裂负荷(UTS)达95kN，可满足带中继器敷设回收水深超过8000米。
2.海底光缆抗压扁负荷达到20kN，抗冲击功达到200J，可保证海缆能承受全寿命周期中可能出现的冲击、压扁负荷，保护中心光单元，保障海缆传输性能。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (4)

  1. 海底光缆奇数不等径钢丝复合铜管一体化拱形内铠结构，其包括套在不锈钢管外的钢丝层和套在所述钢丝层外的铜管，其特征在于，所述钢丝层由第一钢丝、第二钢丝、第三钢丝三种不同外径的钢丝绕不锈钢管轴线环形阵列分布并绞合而成，每种外径的钢丝数量为奇数，所述第一钢丝、第二钢丝、第三钢丝外径依次减小，所述第一钢丝设置于所述钢丝层内层，所述第二钢丝和所述第三钢丝设置于所述钢丝层外层且相互间隔排列，第一钢丝相邻之间彼此相切，所有所述第一钢丝内侧相切的圆直径大于所述不锈钢管外径，即所述第一钢丝与所述不锈钢管外壁之间存在间隙，所述的钢丝层内层的外壁与钢丝层外层的内壁紧贴。
  2. 根据权利要求1所述的海底光缆奇数不等径钢丝复合铜管一体化拱形内铠结构，其特征是，所述第一钢丝、第二钢丝以及第三钢丝均为高强度磷化钢丝。
  3. 根据权利要求1所述的海底光缆奇数不等径钢丝复合铜管一体化拱形内铠结构，其特征是，所述铜管为三枪氩弧焊进行无缝焊接后拉拔而成的无缝铜管，所述铜管的内壁嵌入到第三钢丝和第二钢丝间隙中，形成钢丝层、铜管一体化的内铠结构。
  4. 根据权利要求1所述的海底光缆奇数不等径钢丝复合铜管一体化拱形内铠结构，其特征是，所述铜管为三枪氩弧焊无缝焊接一体拉拔式铜管。
PCT/CN2020/125741 2020-03-18 2020-11-02 海底光缆奇数不等径钢丝复合铜管一体化拱形内铠结构 WO2021184771A1 (zh)

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CN111427124A (zh) * 2020-03-18 2020-07-17 江苏亨通海洋光网系统有限公司 海底光缆奇数不等径钢丝复合铜管一体化拱形内铠结构
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