WO2022041527A1 - 一种光单元纵包铜带结构的海光缆及其制备方法 - Google Patents

一种光单元纵包铜带结构的海光缆及其制备方法 Download PDF

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Publication number
WO2022041527A1
WO2022041527A1 PCT/CN2020/131910 CN2020131910W WO2022041527A1 WO 2022041527 A1 WO2022041527 A1 WO 2022041527A1 CN 2020131910 W CN2020131910 W CN 2020131910W WO 2022041527 A1 WO2022041527 A1 WO 2022041527A1
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copper tape
rope
optical
optical cable
asphalt
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PCT/CN2020/131910
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English (en)
French (fr)
Inventor
但一
张超
许人东
范明海
李涛
蔡旦君
闫德胜
王亚周
聂玉全
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江苏亨通海洋光网系统有限公司
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Publication of WO2022041527A1 publication Critical patent/WO2022041527A1/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
    • G02B6/4415—Cables for special applications
    • G02B6/4427—Pressure resistant cables, e.g. undersea cables
    • 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
    • G02B6/4429—Means specially adapted for strengthening or protecting the cables
    • G02B6/44384—Means specially adapted for strengthening or protecting the cables the means comprising water blocking or hydrophobic materials
    • 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
    • G02B6/4479—Manufacturing methods of optical cables
    • 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
    • G02B6/4479—Manufacturing methods of optical cables
    • G02B6/4483—Injection or filling devices

Definitions

  • the invention relates to the technical field of submarine optical cables, in particular to a submarine optical cable with a longitudinally clad copper tape structure of an optical unit and a preparation method thereof.
  • submarine optical cable As the link of transoceanic communication and island communication transmission, submarine optical cable has the characteristics of large capacity, high reliability and strong anti-interference, and plays an extremely important role in international communication. With the improvement of the national maritime strategic status, along the national "One Belt, One Road” route planning, submarine optical cables will appear more frequently in people's field of vision.
  • Most submarine optical cables include a feeder structure.
  • cable factories use copper wire or copper tape as the main feeder conductor to realize long-length transmission of submarine optical fiber communication, and better realize fault warning and positioning functions.
  • the main structures of the currently commonly used feeder submarine cables are:
  • the submarine optical cable has high requirements on the mechanical strength, water permeability, corrosion resistance, etc. of the submarine cable. Therefore, the outer layer of the copper tube of the traditional submarine cable needs to add steel wire armor again to increase the mechanical performance of the submarine cable. and corrosion resistance, the outer diameter and weight of the optical cable have increased due to repeated armoring and argon arc welding of copper tubes.
  • the steel wire armoring on the optical unit of the traditional submarine cable may crush the optical unit during the process.
  • the armored steel wire needs to be evenly coated with water-blocking glue to ensure the water-blocking performance, and the coating uniformity of the water-blocking glue is also important. It is difficult to control, and the coating of water blocking glue will also affect the welding quality of subsequent argon arc welding of copper tubes.
  • the complexity and variety of processes make the quality control process of the product more difficult and the process stability deteriorates.
  • the complex process of applying water-blocking glue on the steel wire armor and argon arc welding copper tube makes the manufacturing cost of the submarine cable. increase, while the yield is lower and needs to be improved.
  • the main technical problem to be solved by the present invention is to provide a sea optical cable with a longitudinally clad copper tape structure of an optical unit and a preparation method thereof, which eliminates the argon arc welding fixation of the copper tape, reduces production difficulty and self-weight, and improves the yield.
  • a technical solution adopted in the present invention is to provide a sea optical cable with an optical unit longitudinally wrapped copper tape structure and a preparation method thereof, comprising: an optical unit, a copper tape and a sheath, and the copper tape is longitudinally wrapped On the surface of the light unit, the sheath is arranged on the outer surface of the copper tape, and part or all of the inner surface of the copper tape is covered with an adhesive film, the outer surface of the light unit and the inner surface of the copper tape or the adhesive film Glue is arranged between them for bonding, and the edge portions of the copper tapes are overlapped for lap fixing.
  • the adhesive film covers at least one edge of the inner surface of the copper tape, so that after the edges of the copper tape are overlapped, this part of the adhesive film is located between the overlap gaps.
  • an uncoated area of a certain width is reserved on the edge of the adhesive film.
  • the sheath is a PE sheath.
  • it further includes an outer armor steel wire, a first PP rope, an asphalt spacer layer and a second PP rope, the outer armor steel wire is stranded on the outside of the sheath, and the first PP rope is wrapped around On the surface of the outer armor steel wire, the asphalt spacer layer is arranged outside the first PP rope, and the second PP rope is wrapped around the surface of the asphalt spacer layer.
  • the surfaces of the outer armor steel wire and the first PP rope are coated with asphalt.
  • the optical unit includes fiber paste, a stainless steel tube and an optical fiber, and the optical fiber and the fiber paste are arranged in the stainless steel tube.
  • another technical solution adopted by the present invention is to provide a preparation method of a submarine optical cable, which includes the following steps: .
  • the optical fiber is wrapped in a stainless steel tape and rolled into a stainless steel tube, and the fiber paste is injected into the stainless steel tube at the same time, welded and fixed, and then drawn by a drawing die to improve the strength of the optical unit;
  • Longitudinal clad copper tape compound the film on the inner surface of the copper tape, then apply glue on the surface of the film or stainless steel tube, wrap the copper tape on the surface of the stainless steel tube, and set an overlapping area on the edge of the copper tape to form a lap joint
  • the structure of the lap joint is connected and sealed with adhesive film and glue, and then tightened and straightened by the sizing die;
  • the outer diameter of the copper strip after longitudinal wrapping is measured by a caliper to ensure the roundness and the uniformity of the outer diameter;
  • the outer diameter of the extruded sheath is measured by a caliper to ensure the roundness and the uniformity of the outer diameter
  • the outer armor steel wire is stranded to the sheath in an orderly manner by using a cage stranding machine.
  • the wrapping machine is used to wrap the first PP rope to the surface of the outer armor steel wire, and the first PP rope during the wrapping process is sprayed with asphalt;
  • the asphalt is coated on the first PP rope after wrapping to form a circle of asphalt spacer layer.
  • a hammering device is added to hammer the lap joint, so as to ensure the thickness uniformity of the copper tape lap joint and the reliability of the lap joint.
  • a wrapping of the second PP rope is also included, and a wrapping machine is used to wrap the second PP rope onto the surface of the asphalt spacer layer.
  • a submarine optical cable with a longitudinally clad copper tape structure of an optical unit and a preparation method thereof pointed out by the present invention optimize the structure of the traditional feeding type submarine optical cable, reduce the self-weight and material cost without argon arc welding, The cooperation of the adhesive film and the glue realizes the vertical wrapping and sealing of the copper tape on the surface of the optical unit, and ensures the strength and sealing of the lap joint, which reduces the cost of materials, the difficulty of repairing the feeding layer, and the risk of construction and joints. the goal of.
  • FIG. 1 is a schematic structural diagram of a preferred embodiment of a sea optical cable with a longitudinally clad copper tape structure of an optical unit of the present invention and a preparation method thereof;
  • FIG. 2 is a schematic structural diagram of the copper strip in FIG. 1 .
  • the embodiments of the present invention include:
  • the optical fiber cable with the optical unit longitudinally clad with copper tape structure includes: light unit, copper tape 1, sheath 4, outer armor steel wire 5, first PP rope 7, asphalt spacer layer 6 and second PP rope 8.
  • the optical unit includes fiber paste, stainless steel tube 3 and optical fiber 2.
  • the optical fiber 2 and fiber paste are arranged in the stainless steel tube 3, and the fiber 2 is protected by the stainless steel tube 3, and the anti-extrusion effect is good.
  • the copper tape 1 is longitudinally wrapped on the surface of the light unit, a part or all of the inner surface of the copper tape 1 is covered with an adhesive film 10, and a glue 9 is arranged between the outer surface of the light unit and the inner surface of the copper tape 1 or the adhesive film 10 for adhesion.
  • the junction does not need argon arc welding.
  • the edge parts of the copper strip 1 are overlapped and fixed by overlapping, which reduces the difficulty of the process.
  • the copper strip 1 does not need argon arc welding, so that the copper strip 1 can be made of thinner materials, which can reduce the input cost of raw materials on the basis of ensuring the power feeding performance.
  • the adhesive film 10 covers at least one edge of the inner surface of the copper tape 1. As shown in FIG. 2, the adhesive film 10 completely covers the inner surface of the copper tape 1 and extends to the most edge, but the glue 9 is in the A blank area is left on the edge of the adhesive film 10, so that after the edges of the copper tape 1 are overlapped, this part of the adhesive film 10 is located between the overlapped gaps, which is conducive to the hot-melt sealing connection after subsequent heating, and the overlapped gaps
  • the outer part is the glue film 10 and the inner part is the glue 9, which is double sealed and has a good water blocking effect.
  • the sheath 4 is arranged on the outer surface of the copper strip 1.
  • the sheath 4 is a PE sheath, which can be extruded with HDPE material, and has good heat resistance, cold resistance and toughness, and chemical stability. Well, the mechanical strength is high, and the protection of the copper strip 1 is strengthened.
  • the outer armor steel wire 5 is twisted on the outer side of the sheath 4 for tensile protection
  • the first PP rope 7 is wrapped around the surface of the outer armor steel wire 5
  • the asphalt spacer layer 6 is arranged on the outer side of the first PP rope 7
  • the second PP rope 8 is wrapped around the surface of the asphalt spacer layer
  • the surface of the outer armor steel wire 5 and the first PP rope 7 is wrapped with asphalt to form a multi-layer protection system, which is suitable for the complex use environment of the seabed.
  • a preparation method of a submarine optical cable comprising the following steps:
  • the optical fiber 2 is wrapped in a stainless steel tape and rolled into a stainless steel tube 3, and the fiber paste is injected into the stainless steel tube 3 at the same time, and after welding and fixing, the drawing process is performed by a drawing die to improve the strength of the optical unit;
  • the outer diameter of the copper strip 1 after longitudinal wrapping is measured by a caliper, and if any defects are found, repair it to ensure the roundness and the uniformity of the outer diameter, which is beneficial to the subsequent extrusion;
  • the surface of the heated copper strip is formed by the sheath 4, and the copper strip is preheated in the previous heating step, which reduces the temperature difference between the metal surface and the extruded PE material, so that the extruded protection
  • the adhesion between the sleeve 4 and the surface of the copper tape 1 is better;
  • the outer diameter of the extruded sheath 4 is measured by a caliper to ensure the roundness and the uniformity of the outer diameter;
  • the outer armor steel wire 5 is stranded on the sheath 4 in an orderly manner by using a cage stranding machine. Coating and wrapping, through the design of the stranding die and the adjustment of process parameters, the natural twisting point and fitting angle of the outer armor steel wire 5 are changed, so as to avoid the problem caused by the twisting and rotating force of the outer armor steel wire 5 during the twisting process of the copper tape 1;
  • the wrapping machine is used to wrap the first PP rope 7 on the surface of the outer armor steel wire 5, and the first PP rope 7 in the wrapping process is sprayed with asphalt to carry out the first PP rope. 7 and the protection of the outer armor steel wire 5;
  • the asphalt is coated on the first PP rope after wrapping to form a circle of asphalt spacer layers to increase the anti-corrosion effect;
  • a wrapping machine is used to wrap the second PP rope 8 onto the surface of the asphalt spacer layer 6, so as to improve the anti-corrosion and protection effects, and the structure is more stable.
  • the present invention provides a sea optical cable with a light unit longitudinally clad copper tape structure and a preparation method thereof, which eliminates the argon arc welding and sealing welding of the copper tape 1 and the inner and outer double-layer steel wire armoring in the traditional process, thereby reducing the production cost.
  • the difficulty, outer diameter and self-weight ensure the process stability and yield of the production process, which is conducive to later maintenance, and the characteristics of high strength and light weight can reduce the cost of storage, transportation, and laying of submarine cables.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulated Conductors (AREA)

Abstract

一种光单元纵包铜带(1)结构的海光缆及其制备方法，包括：光单元、铜带(1)、护套(4)、外铠钢丝(5)、第一PP绳(7)、沥青间隔层(6)和第二PP绳(8)，利用铜带(1)纵向包裹在光单元的表面，将护套(4)设置在铜带(1)的外表面，铜带(1)的内表面的局部或者全部覆盖设置有胶膜(10)，光单元外表面与铜带(1)内表面或胶膜(10)之间设置有胶水(9)进行粘结，铜带(1)的边缘部分重叠进行搭接固定。通过光单元纵包铜带(1)结构的海光缆及其制备方法，优化传统馈电型海底光缆结构，无需氩弧焊而降低了自重和材料成本，通过胶膜(10)与胶水(9)的配合，实现铜带(1)在光单元表面的纵包固定和密封，并确保搭接处的强度和密封性，降低了铜带(1)修复难度和施工风险。

Description

一种光单元纵包铜带结构的海光缆及其制备方法 技术领域
本发明涉及海底光缆技术领域，特别是涉及一种光单元纵包铜带结构的海光缆及其制备方法。
背景技术
海底光缆作为跨洋通信、岛屿通信传输的纽带，具有大容量、高可靠性、强抗干扰性等特点，在国际通信中起着极其重要的作用。随着国家海洋战略地位的提升，沿着国家“一带一路”的路线规划，海底光缆将更加频繁的出现在人们的视野当中。
大部分海底光缆中包含馈电结构，现阶段缆厂均使用铜丝或铜带作为主馈电导体，进而实现海底光纤通信的大长度传输，以及更好的实现故障预警及定位功能。目前常用的馈电海底光缆主要结构为：
1、不锈钢管光单元+内层钢丝铠装+焊接铜带+内护层+可能存在的外层钢丝铠装及外护层；
2、不锈钢管光单元+内层铜丝+内护层+可能存在的外层钢丝铠装及外护层。
实际上，海底光缆对海缆的机械强度、渗水性能、防腐蚀性能等都有很高的要求，因此，传统的海光缆铜管外层还需再次增加钢丝铠装来增加海缆的机械性能和耐腐蚀性能，多次的铠装和铜管氩弧焊使得光缆的外径和重量都有所增加。
另外，传统海底光缆在光单元上进行钢丝铠装有可能在制程中压坏光单元，铠装钢丝上需要均匀涂覆阻水胶来确保阻水性能，而阻水胶的涂覆均匀性也比较难以控制，阻水胶的涂覆还会影响后续铜管氩弧焊的焊接质量。工序的复杂多样使得产品的质量控制过程难度增加，工艺稳定性变差，而且在钢丝铠装上 涂阻水胶再加上氩弧焊铜管这一系列复杂的工艺流程使得海光缆的制造成本增加，而成品率较低，需要改进。
发明内容
本发明主要解决的技术问题是提供一种光单元纵包铜带结构的海光缆及其制备方法，摒弃铜带的氩弧焊固定，降低生产难度和自重，提升成品率。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种光单元纵包铜带结构的海光缆及其制备方法，包括：光单元、铜带和护套，所述铜带纵向包裹在光单元的表面，所述护套设置在铜带的外表面，所述铜带的内表面的局部或者全部覆盖设置有胶膜，所述光单元外表面与铜带内表面或胶膜之间设置有胶水进行粘结，所述铜带的边缘部分重叠进行搭接固定。
在本发明一个较佳实施例中，所述胶膜至少覆盖在铜带内表面一侧边缘，以使得铜带的边缘搭接后，这部分胶膜位于搭接缝隙之间。
在本发明一个较佳实施例中，所述胶水涂布在胶膜表面时，在胶膜边缘预留一定宽度的不涂区域。
在本发明一个较佳实施例中，所述护套为PE护套。
在本发明一个较佳实施例中，还包括外铠钢丝、第一PP绳、沥青间隔层和第二PP绳，所述外铠钢丝绞合在护套外侧，所述第一PP绳绕包在外铠钢丝表面，所述沥青间隔层设置在第一PP绳外侧，所述第二PP绳绕包在沥青间隔层表面。
在本发明一个较佳实施例中，所述外铠钢丝和第一PP绳表面包裹有沥青。
在本发明一个较佳实施例中，所述光单元包括纤膏、不锈钢管和光纤，所述光纤和纤膏设置在不锈钢管中。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种海光缆的制备方法，包括以下步骤：。
光单元的加工，将光纤包入不锈钢带中卷制成不锈钢管，同时向不锈钢管内注入纤膏，焊接固定，再通过拉拔模具进行拉拔处理提升光单元的强度；
纵包铜带，将胶膜复合在铜带的内表面，然后在胶膜或不锈钢管表面涂胶水，将铜带卷制包裹在不锈钢管表面，并在铜带边缘设置重叠区而形成搭接的结构，利用胶膜和胶水进行搭接处的连接和密封，再经过定径模收紧拉直；
整形，通过滚轮进行滚压整形，提升铜带卷制后的圆整度；
第一次测径，通过测径仪对纵包成型后的铜带进行外径测量，确保圆整度和外径尺寸均匀性；
加热，对纵包成型后的铜带进行加热，使得胶膜热熔而提升搭接处的密封性能；
挤塑，通过挤塑机，对纵包成型后的铜带表面进行护套的成型；
第二次测径，通过测径仪对挤塑成型的护套进行外径测量，确保圆整度和外径尺寸均匀性；
外铠钢丝的绞合，利用笼绞机将外铠钢丝有序绞合至护套上，在外铠钢丝绞合过程中对外铠钢丝进行沥青的喷淋使外铠钢丝完全被沥青涂覆包裹；
第一PP绳的绕包，利用绕包机将第一PP绳绕包到外铠钢丝表面，并对绕包过程中的第一PP绳进行沥青的喷淋；
沥青间隔层的施工，将沥青涂布在绕包后的第一PP绳上，形成一圈沥青间隔层。
在本发明一个较佳实施例中，所述整形步骤中，增加锤击装置对搭接处进 行锤击，保证铜带搭接处的厚度均匀性和搭接的可靠性。
在本发明一个较佳实施例中，还包括第二PP绳的绕包，利用绕包机将第二PP绳绕包到沥青间隔层表面。
本发明的有益效果是：本发明指出的一种光单元纵包铜带结构的海光缆及其制备方法，优化传统馈电型海底光缆结构，无需氩弧焊而降低了自重和材料成本，通过胶膜与胶水的配合，实现铜带在光单元表面的纵包固定和密封，并确保搭接处的强度和密封性，达到了降低材料成本、降低馈电层修复难度和降低施工及接头风险的目的。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图，其中：
图1是本发明一种光单元纵包铜带结构的海光缆及其制备方法一较佳实施例的结构示意图；
图2是图1中铜带的结构示意图。
具体实施方式
下面将对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
请参阅图1～图2，本发明实施例包括：
如图1所示的光单元纵包铜带结构的海光缆，包括：光单元、铜带1、护套 4、外铠钢丝5、第一PP绳7、沥青间隔层6和第二PP绳8，在本实施例中，光单元包括纤膏、不锈钢管3和光纤2，光纤2和纤膏设置在不锈钢管3中，通过不锈钢管3进行光纤2的防护，抗挤压效果好。
铜带1纵向包裹在光单元的表面，铜带1的内表面的局部或者全部覆盖设置有胶膜10，光单元外表面与铜带1内表面或胶膜10之间设置有胶水9进行粘结，无需氩弧焊，如图2所示，铜带1的边缘部分重叠进行搭接固定，降低了工艺难度。另外，铜带1无需氩弧焊，使得铜带1可以采取更加薄的材料，确保馈电性能的基础上，降低原材料投入成本。
胶水涂布在胶膜表面时，在胶膜边缘预留一定宽度的不涂区域，有利于后续的热熔密封。在本实施例中，胶膜10至少覆盖在铜带1内表面一侧边缘，如图2所示，胶膜10进行了铜带1内表面的完全覆盖并延伸至最边缘，但胶水9在胶膜10边缘留下了空白地带，以使得铜带1的边缘搭接后，这部分胶膜10位于搭接的缝隙之间，有利于后续加热后的热熔密封连接，而且搭接的缝隙靠外侧部分是胶膜10，内侧部分是胶水9，双重密封，阻水效果好。
如图1所示，护套4设置在铜带1的外表面，护套4为PE护套，可以采用HDPE材料进行挤塑成型，具有良好的耐热性、耐寒性和韧性，化学稳定性好，机械强度高，加强了对铜带1的保护。
在本实施例中，外铠钢丝5绞合在护套4外侧，进行抗拉防护，将第一PP绳7绕包在外铠钢丝5表面，沥青间隔层6设置在第一PP绳7外侧，第二PP绳8绕包在沥青间隔层表面，而且外铠钢丝5和第一PP绳7的表面包裹有沥青，形成多层防护系统，适应海底复杂的使用环境。
实施例：
一种海光缆的制备方法，包括以下步骤：
光单元的加工，将光纤2包入不锈钢带中卷制成不锈钢管3，同时向不锈钢管3内注入纤膏，焊接固定候再通过拉拔模具进行拉拔处理提升光单元的强度；
纵包铜带，将胶膜复合在铜带1的内表面，形成铜塑复合带，然后在胶膜10或不锈钢管3表面喷涂胶水9(胶水9避开胶膜10边缘)，通过模具将铜带1卷制包裹在不锈钢管3表面，并在铜带1边缘设置重叠区而形成搭接的结构，利用胶膜10和胶水9进行搭接处的连接和密封，再经过定径模收紧拉直；
整形，通过滚动整形装置的滚轮进行滚压整形，提升铜带1卷制后的圆整度，滚轮采用铁制轮子，表面镀铬，提升表面光洁度，减少粘结，通过锤击装置对搭接处进行锤击，保证铜带搭接处的厚度均匀性和搭接的可靠性；
第一次测径，通过测径仪对纵包成型后的铜带1进行外径测量，发现不良进行返修，确保圆整度和外径尺寸均匀性，有利于后续的挤塑；
加热，对纵包成型后的铜带1进行加热，使得胶膜10热熔而提升搭接处的密封性能；
挤塑，通过挤塑机，对加热后的铜带表面进行护套4的成型，前面的加热步骤进行铜带预加热，缩小了金属表面与挤塑PE料的温差，使挤塑后的护套4与铜带1表面的粘结力更好；
第二次测径，通过测径仪对挤塑成型的护套4进行外径测量，确保圆整度和外径尺寸均匀性；
外铠钢丝的绞合，利用笼绞机将外铠钢丝5有序绞合至护套4上，在外铠钢丝5绞合过程中对外铠钢丝进行沥青的喷淋使外铠钢丝5完全被沥青涂覆包裹，通过绞合模具的设计以及工艺参数调整改变外铠钢丝5自然绞合点和拟合角度，避免铜带1在绞合过程中受外铠钢丝5绞合旋转的力造成的问题；
第一PP绳7的绕包，利用绕包机将第一PP绳7绕包到外铠钢丝5表面，并对绕包过程中的第一PP绳7进行沥青的喷淋，进行第一PP绳7和外铠钢丝5的防护；
沥青间隔层6的施工，将沥青涂布在绕包后的第一PP绳上，形成一圈沥青间隔层，增加防腐效果；
第二PP绳8的绕包，利用绕包机将第二PP绳8绕包到沥青间隔层6表面，提升防腐和保护效果，结构更加稳定。
综上，本发明指出的一种光单元纵包铜带结构的海光缆及其制备方法，摒弃了传统工艺中对铜带1的氩弧焊密封焊接以及内外双层钢丝铠装，降低了生产难度、外径及自重，确保了生产过程的工艺稳定性和成品率，有利于后期的维护，而且强度高、重量轻的特点可以降低海光缆的储存、运输、敷设等成本。
以上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它相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (10)

  1. 一种光单元纵包铜带结构的海光缆，包括：光单元、铜带和护套，所述铜带纵向包裹在光单元的表面，所述护套设置在铜带的外表面，其特征在于，所述铜带的内表面的局部或者全部覆盖设置有胶膜，所述光单元外表面与铜带内表面或胶膜之间设置有胶水进行粘结，所述铜带的边缘部分重叠进行搭接固定。
  2. 根据权利要求1所述的光单元纵包铜带结构的海光缆，其特征在于，所述胶膜至少覆盖在铜带内表面一侧边缘，以使得铜带的边缘搭接后，这部分胶膜位于搭接缝隙之间。
  3. 根据权利要求1所述的光单元纵包铜带结构的海光缆，其特征在于，所述胶水涂布在胶膜表面时，在胶膜边缘预留一定宽度的不涂区域。
  4. 根据权利要求1所述的光单元纵包铜带结构的海光缆，其特征在于，所述护套为PE护套。
  5. 根据权利要求1所述的光单元纵包铜带结构的海光缆，其特征在于，还包括外铠钢丝、第一PP绳、沥青间隔层和第二PP绳，所述外铠钢丝绞合在护套外侧，所述第一PP绳绕包在外铠钢丝表面，所述沥青间隔层设置在第一PP绳外侧，所述第二PP绳绕包在沥青间隔层表面。
  6. 根据权利要求5所述的光单元纵包铜带结构的海光缆，其特征在于，所述外铠钢丝和第一PP绳表面包裹有沥青。
  7. 根据权利要求1所述的光单元纵包铜带结构的海光缆，其特征在于，所述光单元包括纤膏、不锈钢管和光纤，所述光纤和纤膏设置在不锈钢管中。
  8. 一种海光缆的制备方法，用于权利要求1～7任一所述的光单元纵包铜带结构的海光缆的制备，其特征在于，包括以下步骤：
    光单元的加工，将光纤包入不锈钢带中卷制成不锈钢管，同时向不锈钢管内注入纤膏，焊接固定，再通过拉拔模具进行拉拔处理提升光单元的强度；
    纵包铜带，将胶膜复合在铜带的内表面，然后在胶膜或不锈钢管表面涂胶水，将铜带卷制包裹在不锈钢管表面，并在铜带边缘设置重叠区而形成搭接的结构，利用胶膜和胶水进行搭接处的连接和密封，再经过定径模收紧拉直；
    整形，通过滚轮进行滚压整形，提升铜带卷制后的圆整度；
    第一次测径，通过测径仪对纵包成型后的铜带进行外径测量，确保圆整度和外径尺寸均匀性；
    加热，对纵包成型后的铜带进行加热，使得胶膜热熔而提升搭接处的密封性能；
    挤塑，通过挤塑机，对纵包成型后的铜带表面进行护套的成型；
    第二次测径，通过测径仪对挤塑成型的护套进行外径测量，确保圆整度和外径尺寸均匀性；
    外铠钢丝的绞合，利用笼绞机将外铠钢丝有序绞合至护套上，在外铠钢丝绞合过程中对外铠钢丝进行沥青的喷淋使外铠钢丝完全被沥青涂覆包裹；
    第一PP绳的绕包，利用绕包机将第一PP绳绕包到外铠钢丝表面，并对绕包过程中的第一PP绳进行沥青的喷淋；
    沥青间隔层的施工，将沥青涂布在绕包后的第一PP绳上，形成一圈沥青间隔层。
  9. 根据权利要求8所述的海光缆的制备方法，其特征在于，所述整形步骤中，增加锤击装置对搭接处进行锤击，保证铜带搭接处的厚度均匀性和搭接的可靠性。
  10. 根据权利要求8所述的海光缆的制备方法，其特征在于，还包括第二 PP绳的绕包，利用绕包机将第二PP绳绕包到沥青间隔层表面。
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