WO2021208304A1 - Submarine cable and preparation method therefor - Google Patents

Submarine cable and preparation method therefor Download PDF

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Publication number
WO2021208304A1
WO2021208304A1 PCT/CN2020/108526 CN2020108526W WO2021208304A1 WO 2021208304 A1 WO2021208304 A1 WO 2021208304A1 CN 2020108526 W CN2020108526 W CN 2020108526W WO 2021208304 A1 WO2021208304 A1 WO 2021208304A1
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WO
WIPO (PCT)
Prior art keywords
layer
armor layer
armor
submarine cable
monofilament
Prior art date
Application number
PCT/CN2020/108526
Other languages
French (fr)
Chinese (zh)
Inventor
张洪亮
严彦
胡明
闫志雨
于洪淼
李思宁
谢书鸿
薛建林
朱井华
张小龙
曹凯
花炜
Original Assignee
中天科技海缆股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 中天科技海缆股份有限公司 filed Critical 中天科技海缆股份有限公司
Priority to EP20919372.1A priority Critical patent/EP3923303A4/en
Publication of WO2021208304A1 publication Critical patent/WO2021208304A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/1875—Multi-layer sheaths
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
    • H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/14—Submarine cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/22—Metal wires or tapes, e.g. made of steel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/22—Metal wires or tapes, e.g. made of steel
    • H01B7/226—Helicoidally wound metal wires or tapes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • H01B9/021—Features relating to screening tape per se
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • H01B9/022—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients composed of longitudinal lapped tape-conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
    • H01B7/046—Flexible cables, conductors, or cords, e.g. trailing cables attached to objects sunk in bore holes, e.g. well drilling means, well pumps

Definitions

  • This application relates to the technical field of submarine cable design, in particular to a submarine cable and a preparation method thereof.
  • High-voltage AC and DC submarine power cables are suitable for marine power transmission. They are different from land power cables.
  • the delivery length of submarine cables can reach dozens or even hundreds of kilometers.
  • Transportation and construction after production need to be completed by special construction vessels.
  • the gravity of the submarine cable increases with the depth of the water, which will cause damage if it exceeds the mechanical bearing capacity of the internal components of the submarine cable. Therefore, the design of the submarine cable requires axial mechanical tensile strength
  • a submarine cable includes a plurality of structural units and a protection unit.
  • the protection unit is arranged on the outer periphery of the structural unit.
  • the protection unit includes an outer protective layer and an armor layer.
  • the armor layer is located on the outer protective layer and Between the structural units, the armor layer is arranged in two layers, and the angle between the monofilament of the armor layer of the inner layer and the axis of the submarine cable is larger than the monofilament of the armor layer of the outer layer The angle between the axis of the submarine cable or the twisting direction of the monofilaments of the two armor layers is opposite.
  • the monofilament constituting the outer layer of the armor layer is a metal wire with a circular or trapezoidal cross section
  • the monofilament constituting the inner layer of the armor layer is a metal wire with a circular cross section.
  • a metal wire or metal tape with a trapezoidal cross-section when the monofilament of the armor layer has a trapezoidal cross-section, the ratio of the maximum width to the thickness of the monofilament is 2:1.
  • the two armor layers are both formed by twisting metal wires with a trapezoidal cross-section or a circular cross-section.
  • the angle between is 5.5°-6.5°
  • the strands of the monofilaments of the inner armor layer and the monofilaments of the outer armor layer are twisted in the same direction, and the monofilaments of the inner armor layer are the same as the submarine cable
  • the included angle between the axes is 8.8-10.3°.
  • the thickness of the armor layer monofilament is h
  • the maximum width of the armor layer monofilament is d
  • the inner diameter of the armor layer is D
  • the number of armor layers in the outer layer is:
  • the monofilament constituting the armor layer of the inner layer is a metal tape
  • the width of the overlapping portion of the two adjacent layers of metal tape on the armor layer of the inner layer is equal to the width of the metal tape. 15%-20%.
  • the three structural units are arranged in a circular array in the protection unit.
  • Another purpose of this application is to provide a method for preparing a submarine cable, which is used to prepare the above-mentioned submarine cable, including the following steps:
  • Twisting the armor layer arranging the armor layer of the inner layer and the armor layer of the outer layer respectively along the advancing direction of the structural unit, and stranding;
  • the outer protective layer is coated.
  • two synchronous stranding devices are used to strand the outer side of the structural unit, and the rotation speed of the stranding device of the inner armor layer is the same as that of the outer layer.
  • the rotation speed of the twisting device of the armor layer is twice or the rotation speed of the twisting device of the armor layer inside and outside is the same.
  • the inner armor layer is wrapped around the outer periphery of the structural unit, and then the protection unit covered with the inner armor layer is placed in Into the stranding device of the outer armor layer.
  • the above-mentioned submarine cable is provided with a double-layer armor layer, and is restricted by the angle between the monofilaments on the two armor layers and the central horizontal line, so that the gaps between the monofilaments on the two armor layers are different in the axial direction.
  • the angle or direction can avoid the situation that sharp objects enter into the gaps between the monofilaments of the second armor layer while easily entering the gaps between the monofilaments of the first armor layer. High-strength protection.
  • Fig. 1 is a schematic cross-sectional view of a submarine cable in an embodiment of the application.
  • Fig. 2 is a schematic cross-sectional view of a submarine cable in another embodiment of the application.
  • Fig. 3 is a schematic diagram of the structure of a submarine cable in an embodiment of the application.
  • Fig. 4 is a schematic structural diagram of a submarine cable in another embodiment of the application.
  • Fig. 5 is a schematic cross-sectional view of an armor layer monofilament in an embodiment of the application.
  • Fig. 6 is a schematic diagram of the structure of a submarine cable in still another embodiment of the application.
  • FIG. 7 is a schematic diagram of the structure of the submarine cable prepared in an embodiment of the application.
  • FIG. 8 is a schematic diagram of the structure of the submarine cable prepared in another embodiment of the application.
  • the present application provides a submarine cable, including a number of structural units and a protection unit, the protection unit is arranged on the outer periphery of the structural unit, the protection unit includes an outer protective layer and an armor layer arranged on the outer periphery, the armor The layer is located between the outer sheath and the structural unit, the armor layer is arranged in two layers, and the angle between the monofilament of the armor layer in the inner layer and the axis of the submarine cable is larger than that of the outer layer The angle between the monofilament of the armor layer and the axis of the submarine cable or the angle between the monofilament of two layers of the armor layer and the axis of the submarine cable is opposite.
  • This application also provides a method for preparing a submarine cable, which is used to prepare the above-mentioned submarine cable, including the following steps:
  • Stranded armor layer Two armor layers are selected, and the stranding device of the outer layer of the armor layer and the stranding device of the inner layer of the armor layer are arranged in line along the advancing direction of the structural unit, and twisted combine;
  • the outer protective layer is coated.
  • the above-mentioned submarine cable is provided with a double-layer armor layer, and is restricted by the angle between the monofilaments on the two armor layers and the central horizontal line, so that the gap between the monofilaments on the two armor layers appears along the axial direction.
  • Different angles or directions can avoid the situation that sharp objects enter into the gaps between the monofilaments of the second armor layer while easily entering the gaps between the monofilaments of the first armor layer, providing a submarine cable A higher intensity of protection.
  • a submarine cable 100 includes a plurality of structural units 10 and a protection unit 30, wherein the protection unit 30 is located on the outer periphery of the plurality of structural units 10, and is used to protect the structural units 10 .
  • the structural unit 10 is provided as one, and the structural unit 10 includes a conductor 11, an inner semiconductive shielding layer 12, an insulating layer 13, and an outer semiconductive shielding arranged in order from the inside to the outside. Layer 14, semiconductive resistance water layer 15, metal shielding layer 16, and plastic protective layer 17.
  • the conductor 11 is used to carry current.
  • the conductor 11 is a solid conductor 11.
  • the conductor 11 may also be a round single-wire stranded conductor 11, a shaped wire conductor 11, and a split conductor 11 One of the conductors 11.
  • the inner semiconductive shielding layer 12 and the outer conductive shielding layer are both formed of extruded semiconductive materials.
  • the inner semiconductive shielding layer 12 is used to eliminate electric field concentration on the surface of the conductor 11 and prevent Partial discharge caused by a gap between the insulating layer 13 and the conductor 11, and the outer semiconductive shielding layer 14 is used for uniform electric field and preventing partial discharge caused by a gap between the insulating layer 13 and the metal shielding layer 16 .
  • the insulating layer 13 is made of lightweight polyethylene to provide insulation.
  • the semiconductive resistive water layer 15 includes an annular corrugated metal sheath and a water blocking material, and the water blocking material is coated on the outer wall of the annular corrugated metal sheath.
  • the metal shielding layer 16 is used to improve the anti-electromagnetic interference capability of the submarine cable 100.
  • the metal shielding layer 16 is formed by wrapping copper tape.
  • the plastic protective layer 17 is used for compression, waterproof, moisture-proof, and connection and unloading protection.
  • the plastic protective layer 17 is a polyethylene jacket formed by extrusion.
  • the number of the structural units 10 may also be three, and the three structural units 10 are arranged in the protection unit 30 in a circular array.
  • the structural unit 10 can also be set to a number of cores other than three cores, and an optical unit 311 can be added in the gap of the protection unit 30 according to functional requirements.
  • the protection unit 30 includes an armor layer 32 and an outer armor layer 33.
  • the armor layer 32 is provided with two layers, and the armor layer 32 is two layers.
  • the two armor layers 32 are respectively a first armor layer 321 arranged on the inner layer and a second armor layer 323 arranged on the outer layer.
  • the outer armor layer 33 is sleeved on the first armor layer.
  • two layers of the armor layer 32 are sleeved on the outer periphery of the plastic sheath 17 of the structural unit 10, and the inner wall of the first armor layer 321 is arranged in close contact with the plastic sheath 17 . Please refer to FIG.
  • the protection unit 30 further includes a lashing tape 31, and the lashing tape 31 is wrapped around the outer peripheries of the three structure units 10, and A number of filling strips 313 are filled in the binding tape 31, and the filling strips 313 are used to fill the gaps between the structural units 10.
  • the second armor layer 323 is formed by twisting monofilaments 3211, and the angle between the monofilaments 3211 of the second armor layer 323 and the axis is It is 5.5°-6.5°. Specifically, the included angle between the monofilament 3211 of the second armor layer 323 and the axis may be 5.5°, 5.6°, 5.7°, 5.8°, 5.9°, 6.0°, 6.1 One of °, 6.2°, 6.3°, 6.4°, 6.5°. 5, in one embodiment, the monofilament 3211 composing the armor layer 32 is a metal wire with a circular cross-section, and the diameter of the metal wire is 5.5 ⁇ 0.5mm.
  • the metal The diameter of the wire is one of 5.0mm, 5.1mm, 5.2mm, 5.3mm, 5.4mm, 5.5mm, 5.6mm, 5.7mm, 5.8mm, 5.9mm, 6.0mm.
  • the monofilament 3211 composing the armor layer 32 can also be a metal wire with a cross-section of 3, and the maximum cross-sectional width of the metal wire is 7.0 ⁇ 0.5 mm.
  • the monofilament 3211 has a cross-section
  • the maximum width of the monofilament 3211 is one of 6.5mm, 6.6mm, 6.7mm, 6.8mm, 6.9mm, 7.0mm, 7.1mm, 7.2mm, 7.3mm, 7.4mm, 7.5mm, when forming the armor
  • the ratio of the maximum cross-sectional width to the thickness of the monofilament 3211 is 2:1.
  • the angle between the first armor layer 321 and the axis is greater than the angle between the second armor layer 323 and the axis.
  • the first armor layer 321 The angle between the first armor layer 321 and the axis is 8.8°-10.3°.
  • the angle between the first armor layer 321 and the axis may be 8.8°, 8.9°, 9.0°, 9.1°, 9.2°, 9.3° °, 9.4°, 9.5°, 9.6°, 9.7°, 9.8°, 9.9°, 10.0°, 10.1°, 10.2°, 10.3°.
  • the number of monofilaments 3211 of the inner armor layer 32 is:
  • the number of monofilaments 3211 of the outer armor layer 32 is:
  • the D is the inner diameter of the structural unit 10
  • the d 1 is the maximum width of the monofilament 3211 of the inner armor layer 32
  • the h 1 is the monofilament 3211 of the inner armor layer 32
  • the d 2 is the maximum width of the monofilament 3211 of the outer armor layer 32
  • the h 2 is the thickness of the monofilament 3211 of the outer armor layer 32.
  • the angle between the monofilament 3211 of the first armor layer 321 and the axis and the angle between the monofilament 3211 of the second armor layer 323 and the axis The sum is equal to 180°, and the cross section of the metal monofilament 3211 composing the first armor layer 321 is either circular or trapezoidal.
  • the number of monofilaments 3211 of the inner armor layer 32 is:
  • the number of monofilaments 3211 of the outer armor layer 32 is:
  • the monofilament constituting the second armor layer 323 is a metal wire
  • the monofilament constituting the first armor layer 321 is a metal tape
  • the metal tape is wrapped to form The first armor layer 321, and the overlapping part of two adjacent layers of the metal tape constituting the first armor layer 321 is 15%-20% of the width of the metal tape.
  • the width of the metal tape constituting the first armor layer 321 is 10 times the maximum width of the monofilament 3211 of the second armor layer 323, and the thickness of the metal tape is the same as that of the second armor layer 323.
  • the monofilament 3211 of the layer 323 is 1/2 of the maximum width.
  • the outer sheath 33 is used to protect the submarine cable 100 during transportation and deep burial.
  • the outer sheath 33 is wound or directly extruded with materials such as polypropylene, polyethylene, polyvinyl chloride, etc. Bag.
  • Another purpose of the present application is to provide a method for preparing the submarine cable 100. Please refer to FIG. 7 and FIG. 8, which includes the following steps:
  • the conductor 11 is twisted, and the inner semiconductive shielding layer 12, the insulating layer 13 and the outer semiconductive shielding layer 14 are twisted layer by layer outside the conductor 11.
  • the inner semiconductive shielding layer 12, The insulating layer 13 and the outer semi-conductive shielding layer 14 are co-extruded to form three layers; then the outer semi-conductive shielding layer 14 is extruded to form a semiconductive resistive water layer 15 and wrapped to form a metal shielding layer 16, and finally the protective unit 30 is extruded.
  • the structural units 10 are twisted, and the gaps between the structural units 10 are filled with filling strips 313, and then a binding tape 31 is wrapped around the outer circumference of the structural unit 10.
  • S2 Stranded armor layer: Two armor layers 32 are selected, and the stranding device of the second armor layer 323 and the stranding device 200 of the first armor layer 321 are advanced along the structural unit 10 Arranged in the direction and twisted;
  • the two armor layers 32 are formed by twisting monofilaments 3211, and the twisting device 200 for twisting the armor layer 32 is a twisted body.
  • the twisting device 200 for twisting the armor layer 32 is a twisted body.
  • two synchronous twisted bodies are used for twisting.
  • the rotation speed of the twisted body of the first armor layer 321 is twice the rotation speed of the twisted body of the second armor layer 323.
  • the rotation speeds of the twisted bodies of the two armor layers 32 are the same.
  • the production process first calculate the number of the first armor layer 321 and the second armor layer 323 according to the calculation formula, and when twisting, the monofilament 3211 is placed on the stranded body.
  • the coiler advances along the positioning channel in the twisted body and gathers at the twisted opening.
  • the twisted body rotates counterclockwise along the axis in the cable advancing direction, winding a plurality of monofilaments 3211 on the cable passing through the twisted opening.
  • the structural unit 10 first enters the stranded body of the first armor layer 321, and the monofilament 3211 of the first armor layer 321 is evenly twisted and covered on the structural unit 10, and then enters the stranded body of the second armor layer 323, The monofilaments 3211 of the second armor layer 323 are evenly twisted and covered on the first armor layer 321. After the structural unit 10 passes through the two twisted bodies, the production of the double-layer armor layer is completed.
  • the first armor layer 321 is formed by wrapping a metal tape on the outer periphery of the structural unit 10.
  • the structural unit 10 first enters the wrapping machine for the first armor layer 321 during production, and enters the strand of the second armor layer 323 after the metal tape is wrapped. Firstly, the first armor layer 321 is wrapped around the outer periphery of the structural unit 10, and during the wrapping process, the overlap ratio of the wrapping is controlled to be 15%-20% of the width. Then, the protection unit 30 covered with the inner armor layer 32 is put into the stranding device 200 of the outer armor layer 32.
  • high-strength fiber ropes are selected to be twisted outside the armor layer to form the outer protective layer 33, or a plastic extruded protective layer can also be used.
  • the submarine cable 100 provided in the present application is provided with a double-layer armor layer 32, and is restricted by the angle between the monofilament 3211 on the two armor layers 32 and the central horizontal line, so that the two-layer armor layer 32 has a single
  • the gaps between the wires 3211 present different angles or directions along the axial direction, which can prevent the sharp objects from entering between the monofilaments 3211 of the second armor layer 323 while easily entering the monofilaments of the first armor layer 321.
  • the conditions in the gap between 3211 provide higher-strength protection for the submarine cable. At the same time, it can meet the needs of the submarine cable when there is no special or additional protection in the complex sea environment, and reduce the need for conventional engineering to carry out complex sea conditions.
  • the work of secondary landfilling, heavy object protection and robot protection has significantly reduced the cost of submarine cable engineering.

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  • Manufacturing & Machinery (AREA)
  • Insulated Conductors (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)

Abstract

A submarine cable and a preparation method therefor. The submarine cable comprises a plurality of structural units and a protection unit, wherein the protection unit is arranged on the periphery of the structural units; the protection unit comprises an outer protection layer and armor layers, which are arranged on the periphery; the armor layers are located between the outer protection layer and the structural units; two armor layers are provided; and an included angle between a monofilament of the inner armor layer and the axis of the submarine cable is greater than an included angle between a monofilament of the outer armor layer and the axis of the submarine cable, or the directions of included angles between monofilaments of the two armor layers and the axis of the submarine cable are opposite one another. According to the submarine cable, by means of limitations on angles between monofilaments of two armor layers and a central horizontal line, gaps between the monofilaments of the two armor layers have different angles or directions in the axial direction, thereby providing stronger protection for the submarine cable.

Description

海底电缆及其制备方法Submarine cable and preparation method thereof 技术领域Technical field
本申请涉及海底电缆设计技术领域，特别是指一种海底电缆及其制备方法。This application relates to the technical field of submarine cable design, in particular to a submarine cable and a preparation method thereof.
背景技术Background technique
本部分旨在为权利要求书中陈述的本申请的实施方式提供背景或上下文。此处的描述不因为包括在本部分中就承认是现有技术。This section is intended to provide background or context for the implementation of the application stated in the claims. The description here is not recognized as prior art just because it is included in this section.
高压交、直流海底电力电缆适用于海洋输电领域，区别于陆地电力电缆，海底电缆交付长度可达几十甚至上百公里，生产后的运输和施工需要借助专用施工船只完成，海缆由船只向水下进行海缆敷设时，海缆自身重力随着水深变深增大，在超过海缆内部部件机械承受能力的情况下会造成损坏，因此海缆设计时对轴向的机械抗拉强度要求较高，目前普遍采用多根抗拉强度较高的金属丝缠绕在海底电缆护套外层作为铠装层来满足轴向受力要求。High-voltage AC and DC submarine power cables are suitable for marine power transmission. They are different from land power cables. The delivery length of submarine cables can reach dozens or even hundreds of kilometers. Transportation and construction after production need to be completed by special construction vessels. When laying a submarine cable underwater, the gravity of the submarine cable increases with the depth of the water, which will cause damage if it exceeds the mechanical bearing capacity of the internal components of the submarine cable. Therefore, the design of the submarine cable requires axial mechanical tensile strength At present, it is common to use multiple metal wires with higher tensile strength to be wound on the outer layer of the submarine cable sheath as the armor layer to meet the axial force requirements.
采用钢丝、铜丝或铝合金等高抗拉强度的金属丝绞合构成铠装层可以有效满足海缆施工时的轴向拉力需要，但是多根金属丝绞合的方式无法为海缆构成密封的外部保护环境，金属丝间的缝隙就成为了海缆长期运行过程中的薄弱点，海底的石头或其他海洋工程残留的尖锐物可能从缝隙对海缆内部结构造成损害。The use of high tensile strength metal wires such as steel wire, copper wire or aluminum alloy to form the armor layer can effectively meet the axial tension requirements of the submarine cable during construction, but the method of twisting multiple metal wires cannot form a seal for the submarine cable For the external protection of the environment, the gap between the metal wires has become a weak point in the long-term operation of the submarine cable. Rocks on the seabed or other sharp objects left by marine engineering may cause damage to the internal structure of the submarine cable through the gap.
发明内容Summary of the invention
鉴于以上内容，有必要提供一种海底电缆，以防止海底电缆应用过程中受到尖锐物刺入造成损伤。In view of the above, it is necessary to provide a submarine cable to prevent damage caused by the penetration of sharp objects during the application of the submarine cable.
本申请提供的技术方案为：The technical solutions provided by this application are:
一种海底电缆，包括若干结构单元及保护单元，所述保护单元设置在所述结构单元外周，所述保护单元包括外护层及铠装层，所述铠 装层位于所述外护层及所述结构单元之间，所述铠装层设置为两层，内层所述铠装层的单丝与所述海底电缆的轴线之间的夹角大于外层所述铠装层的单丝与所述海底电缆的轴线之间的夹角，或者两层所述铠装层的单丝绞合方向相反。A submarine cable includes a plurality of structural units and a protection unit. The protection unit is arranged on the outer periphery of the structural unit. The protection unit includes an outer protective layer and an armor layer. The armor layer is located on the outer protective layer and Between the structural units, the armor layer is arranged in two layers, and the angle between the monofilament of the armor layer of the inner layer and the axis of the submarine cable is larger than the monofilament of the armor layer of the outer layer The angle between the axis of the submarine cable or the twisting direction of the monofilaments of the two armor layers is opposite.
在本申请的一些实施例中，组成外层所述铠装层的单丝为截面为圆形或梯形的金属丝，组成内层所述铠装层的单丝为截面为圆形的金属丝或截面为梯形的金属丝或金属带，并且当所述铠装层的单丝截面为梯形时，所述单丝的最大宽度与厚度的比为2:1。In some embodiments of the present application, the monofilament constituting the outer layer of the armor layer is a metal wire with a circular or trapezoidal cross section, and the monofilament constituting the inner layer of the armor layer is a metal wire with a circular cross section. Or a metal wire or metal tape with a trapezoidal cross-section, and when the monofilament of the armor layer has a trapezoidal cross-section, the ratio of the maximum width to the thickness of the monofilament is 2:1.
在本申请的一些实施例中，两层所述铠装层均由截面为梯形或截面为圆形的金属丝绞合形成，外层所述铠装层的单丝与所述海底电缆的轴线之间的夹角为5.5°-6.5°In some embodiments of the present application, the two armor layers are both formed by twisting metal wires with a trapezoidal cross-section or a circular cross-section. The angle between is 5.5°-6.5°
在本申请的一些实施例中，内层所述铠装层的单丝与外层所述铠装层的单丝绞合方向相同，内层所述铠装层的单丝与所述海底电缆的轴线之间的夹角为8.8-10.3°。In some embodiments of the present application, the strands of the monofilaments of the inner armor layer and the monofilaments of the outer armor layer are twisted in the same direction, and the monofilaments of the inner armor layer are the same as the submarine cable The included angle between the axes is 8.8-10.3°.
在本申请的一些实施例中，所述铠装层单丝的厚度为h，所述铠装层单丝的最大宽度为d，所述铠装层的内径为D，内层所述铠装层的根数为In some embodiments of the present application, the thickness of the armor layer monofilament is h, the maximum width of the armor layer monofilament is d, the inner diameter of the armor layer is D, and the inner layer of the armor The number of layers is
Figure PCTCN2020108526-appb-000001
Figure PCTCN2020108526-appb-000001
外层所述铠装层的根数为：The number of armor layers in the outer layer is:
Figure PCTCN2020108526-appb-000002
Figure PCTCN2020108526-appb-000002
在本申请的一些实施例中，组成内层所述铠装层的单丝为金属带，且内层所述铠装层上相邻两层金属带的重叠部分宽度为所述金属带宽度的15％-20％。In some embodiments of the present application, the monofilament constituting the armor layer of the inner layer is a metal tape, and the width of the overlapping portion of the two adjacent layers of metal tape on the armor layer of the inner layer is equal to the width of the metal tape. 15%-20%.
在本申请的一些实施例中，所述结构单元设置为三个，三个所述结构单元圆周阵列设置在所述保护单元内。In some embodiments of the present application, there are three structural units, and the three structural units are arranged in a circular array in the protection unit.
本申请的另外一个目的在于提供一种海底电缆的制备方法，用于对上述所述的海底电缆进行制备，包含以下步骤，Another purpose of this application is to provide a method for preparing a submarine cable, which is used to prepare the above-mentioned submarine cable, including the following steps:
制备结构单元；Preparation of structural units;
绞合铠装层，将内层所述铠装层与外层所述铠装层分别沿所述结构单元前进方向排列设置，并进行绞合；Twisting the armor layer, arranging the armor layer of the inner layer and the armor layer of the outer layer respectively along the advancing direction of the structural unit, and stranding;
绞合完成后，进行外护层的包覆。After the stranding is completed, the outer protective layer is coated.
在本申请的一些实施例中，绞合过程中，使用两节同步绞合装置绞合在结构单元的外侧，并且，内层所述铠装层的绞合装置的转动速度为外层所述铠装层的绞合装置转动速度的两倍或内外所述铠装层的绞合装置的转动速度相同。In some embodiments of the present application, during the stranding process, two synchronous stranding devices are used to strand the outer side of the structural unit, and the rotation speed of the stranding device of the inner armor layer is the same as that of the outer layer. The rotation speed of the twisting device of the armor layer is twice or the rotation speed of the twisting device of the armor layer inside and outside is the same.
在本申请的一些实施例中，绞合过程中，先将内层所述铠装层绕包设置在所述结构单元外周，再将包覆有内层所述铠装层的保护单元放入到外层所述铠装层的绞合装置内。In some embodiments of the present application, during the stranding process, the inner armor layer is wrapped around the outer periphery of the structural unit, and then the protection unit covered with the inner armor layer is placed in Into the stranding device of the outer armor layer.
上述海底电缆，通过双层铠装层的设置，并通过两层铠装层上单丝与中心水平线之间的角度限制，使得两层铠装层上单丝之间缝隙沿轴向呈现不同的角度或方向，可以避免在尖锐物有缝隙进入到第二铠装层的单丝之间的同时轻易进入到第一铠装层的单丝之间的缝隙中的情况，为海缆提供了更高强度的保护。The above-mentioned submarine cable is provided with a double-layer armor layer, and is restricted by the angle between the monofilaments on the two armor layers and the central horizontal line, so that the gaps between the monofilaments on the two armor layers are different in the axial direction. The angle or direction can avoid the situation that sharp objects enter into the gaps between the monofilaments of the second armor layer while easily entering the gaps between the monofilaments of the first armor layer. High-strength protection.
附图说明Description of the drawings
下面结合附图和具体实施方式对本申请作进一步详细的说明。The application will be further described in detail below in conjunction with the drawings and specific implementations.
图1为本申请一实施方式中海底电缆的截面示意图。Fig. 1 is a schematic cross-sectional view of a submarine cable in an embodiment of the application.
图2为申请另一实施方式中海底电缆的截面示意图。Fig. 2 is a schematic cross-sectional view of a submarine cable in another embodiment of the application.
图3为本申请一实施方式中海底电缆的结构示意图。Fig. 3 is a schematic diagram of the structure of a submarine cable in an embodiment of the application.
图4为本申请另一实施方式中海底电缆的结构示意图。Fig. 4 is a schematic structural diagram of a submarine cable in another embodiment of the application.
图5为本申请一实施方式中铠装层单丝的截面示意图。Fig. 5 is a schematic cross-sectional view of an armor layer monofilament in an embodiment of the application.
图6为本申请再一实施方式中海底电缆的结构示意图。Fig. 6 is a schematic diagram of the structure of a submarine cable in still another embodiment of the application.
图7为本申请一实施方式中海底电缆制备的结构示意图。FIG. 7 is a schematic diagram of the structure of the submarine cable prepared in an embodiment of the application.
图8为本申请另一实施方式中海底电缆制备的结构示意图。FIG. 8 is a schematic diagram of the structure of the submarine cable prepared in another embodiment of the application.
主要元件符号说明:Symbol description of main components:
海底电缆 submarine cable 100100
结构单元 Structural units 1010
导体 conductor 1111
内半导电屏蔽层Inner semi-conductive shielding layer 1212
绝缘层 Insulation 1313
外半导电屏蔽层Outer semi-conductive shielding layer 1414
半导电阻水层Semiconducting resistance water layer 1515
金属屏蔽层 Metal shield 1616
塑料护层 Plastic sheath 1717
保护单元 Protection unit 3030
绑扎带 Lashing tape 3131
光单元 Light unit 311311
填充条 Filler 313313
铠装层 Armor layer 3232
第一铠装层The first armor layer 321321
第二铠装层 Second armor layer 323323
单丝Monofilament 32113211
外护层 Outer sheath 3333
绞合装置Stranding device 200200
具体实施方式Detailed ways
为了能够更清楚地理解本申请实施例的上述目的、特征和优点，下面结合附图和具体实施方式对本申请进行详细描述。需要说明的是，在不冲突的情况下，本申请的实施方式中的特征可以相互组合。In order to be able to understand the above objectives, features and advantages of the embodiments of the application more clearly, the application will be described in detail below with reference to the accompanying drawings and specific implementations. It should be noted that, in the case of no conflict, the features in the embodiments of the present application can be combined with each other.
在下面的描述中阐述了很多具体细节以便于充分理解本申请实施例，所描述的实施方式仅是本申请一部分实施方式，而不是全部的实施方式。In the following description, many specific details are set forth in order to fully understand the embodiments of the present application, and the described implementations are only a part of the implementations of the present application, rather than all of the implementations.
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请实施例的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是旨在于限制本申请实施例。Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field belonging to the embodiments of the present application. The terms used in the specification of the application herein are only for the purpose of describing specific implementations, and are not intended to limit the embodiments of the application.
本申请提供了一种海底电缆，包括若干结构单元及保护单元，所 述保护单元设置在所述结构单元外周，所述保护单元包括设置在外周的外护层及铠装层，所述铠装层位于所述外护层及所述结构单元之间，所述铠装层设置为两层，内层所述铠装层的单丝与所述海底电缆的轴线之间的夹角大于外层所述铠装层的单丝与所述海底电缆的轴线之间的夹角或两层所述铠装层的单丝与所述海底电缆的轴线之间的夹角方向相反。The present application provides a submarine cable, including a number of structural units and a protection unit, the protection unit is arranged on the outer periphery of the structural unit, the protection unit includes an outer protective layer and an armor layer arranged on the outer periphery, the armor The layer is located between the outer sheath and the structural unit, the armor layer is arranged in two layers, and the angle between the monofilament of the armor layer in the inner layer and the axis of the submarine cable is larger than that of the outer layer The angle between the monofilament of the armor layer and the axis of the submarine cable or the angle between the monofilament of two layers of the armor layer and the axis of the submarine cable is opposite.
本申请还提供了一种海底电缆的制备方法，用于对上述所述的海底电缆进行制备，包含以下步骤：This application also provides a method for preparing a submarine cable, which is used to prepare the above-mentioned submarine cable, including the following steps:
制备结构单元；Preparation of structural units;
绞合铠装层：选用两层铠装层，将外层所述铠装层的绞合装置与内层所述铠装层的绞合装置沿所述结构单元前进方向排列设置，并进行绞合；Stranded armor layer: Two armor layers are selected, and the stranding device of the outer layer of the armor layer and the stranding device of the inner layer of the armor layer are arranged in line along the advancing direction of the structural unit, and twisted combine;
绞合完成后，进行外护层的包覆。After the stranding is completed, the outer protective layer is coated.
上述所述海底电缆，通过双层铠装层的设置，并通过两层铠装层上单丝与中心水平线之间的角度限制，使得两层铠装层上单丝之间缝隙沿轴向呈现不同的角度或方向，可以避免在尖锐物有缝隙进入到第二铠装层的单丝之间的同时轻易进入到第一铠装层的单丝之间的缝隙中的情况，为海缆提供了更高强度的保护。The above-mentioned submarine cable is provided with a double-layer armor layer, and is restricted by the angle between the monofilaments on the two armor layers and the central horizontal line, so that the gap between the monofilaments on the two armor layers appears along the axial direction. Different angles or directions can avoid the situation that sharp objects enter into the gaps between the monofilaments of the second armor layer while easily entering the gaps between the monofilaments of the first armor layer, providing a submarine cable A higher intensity of protection.
如下具体实施方式将结合上述附图进一步说明本申请实施例。The following specific implementations will further illustrate the embodiments of the present application in conjunction with the above-mentioned drawings.
请参阅图1和图2，一种海底电缆100，包括若干结构单元10及保护单元30，其中所述保护单元30位于若干所述结构单元10的外周，用于对所述结构单元10进行保护。1 and 2, a submarine cable 100 includes a plurality of structural units 10 and a protection unit 30, wherein the protection unit 30 is located on the outer periphery of the plurality of structural units 10, and is used to protect the structural units 10 .
请参阅图1，在一实施方式中，所述结构单元10设置为一个，所述结构单元10包括由内向外依次设置的导体11、内半导电屏蔽层12、绝缘层13、外半导电屏蔽层14、半导电阻水层15、金属屏蔽层16及塑料护层17。所述导体11用于承载电流，在一实施方式中，所述导体11为实心导体11，在其他实施方式中，所述导体11还可以为圆单线绞合导体11、型线导体11和分割导体11中的一种。在一实施 方式中，所述内半导电屏蔽层12及外导电屏蔽层均由挤包的半导电材料形成，所述内半导电屏蔽层12用于消除所述导体11表面的电场集中，防止所述绝缘层13与导体11之间产生间隙而引起的局部放电，所述外半导电屏蔽层14用于均匀电场，以及防止绝缘层13与金属屏蔽层16之间产生间隙而引起的局部放电。所述绝缘层13由轻量聚乙烯制备而成，以起到绝缘的作用。在一实施方式中，所述半导电阻水层15包括环形皱纹金属护套及阻水材料，所述阻水材料包覆在所述环形皱纹金属护套的外壁上。所述金属屏蔽层16用于提高海底电缆100的抗电磁干扰能力，在一实施方式中，所述金属屏蔽层16为铜带绕包形成。所述塑料护层17用于抗压、防水、防潮及接卸保护，在一实施方式中，所述塑料护层17为挤包形成的聚乙烯护套。在另一实施方式中，请参阅图2，所述结构单元10还可以设置为三个，三个所述结构单元10圆周阵列设置在所述保护单元30内。在其他实施方式中，所述结构单元10还可以设置为三芯以外的其他芯数，并且根据功能需要可在所述保护单元30的缝隙内添加光单元311。Referring to FIG. 1, in one embodiment, the structural unit 10 is provided as one, and the structural unit 10 includes a conductor 11, an inner semiconductive shielding layer 12, an insulating layer 13, and an outer semiconductive shielding arranged in order from the inside to the outside. Layer 14, semiconductive resistance water layer 15, metal shielding layer 16, and plastic protective layer 17. The conductor 11 is used to carry current. In one embodiment, the conductor 11 is a solid conductor 11. In other embodiments, the conductor 11 may also be a round single-wire stranded conductor 11, a shaped wire conductor 11, and a split conductor 11 One of the conductors 11. In one embodiment, the inner semiconductive shielding layer 12 and the outer conductive shielding layer are both formed of extruded semiconductive materials. The inner semiconductive shielding layer 12 is used to eliminate electric field concentration on the surface of the conductor 11 and prevent Partial discharge caused by a gap between the insulating layer 13 and the conductor 11, and the outer semiconductive shielding layer 14 is used for uniform electric field and preventing partial discharge caused by a gap between the insulating layer 13 and the metal shielding layer 16 . The insulating layer 13 is made of lightweight polyethylene to provide insulation. In one embodiment, the semiconductive resistive water layer 15 includes an annular corrugated metal sheath and a water blocking material, and the water blocking material is coated on the outer wall of the annular corrugated metal sheath. The metal shielding layer 16 is used to improve the anti-electromagnetic interference capability of the submarine cable 100. In one embodiment, the metal shielding layer 16 is formed by wrapping copper tape. The plastic protective layer 17 is used for compression, waterproof, moisture-proof, and connection and unloading protection. In one embodiment, the plastic protective layer 17 is a polyethylene jacket formed by extrusion. In another embodiment, referring to FIG. 2, the number of the structural units 10 may also be three, and the three structural units 10 are arranged in the protection unit 30 in a circular array. In other embodiments, the structural unit 10 can also be set to a number of cores other than three cores, and an optical unit 311 can be added in the gap of the protection unit 30 according to functional requirements.
请参阅图1，当所述结构单元10设置为一个，所述保护单元30包括铠装层32及外护层33，所述铠装层32设置有两层，两层所述铠装层32相互贴合设置，两层所述铠装层32分别为设置在内层的第一铠装层321和设置在外层的第二铠装层323，所述外护层33套设在所述第二铠装层323的外周。在一实施方式中，两层所述铠装层32套设在所述结构单元10的塑料护层17外周并且所述第一铠装层321的内壁与所述塑料护层17相贴合设置。请参阅图2，当所述结构单元10设置为三个，所述保护单元30还包括绑扎带31，所述绑扎带31绕包设置在三个所述结构单元10的外周，并且在所述绑扎带31内填充有若干填充条313，所述填充条313用于填充所述结构单元10之间的缝隙。Referring to FIG. 1, when the structural unit 10 is provided as one, the protection unit 30 includes an armor layer 32 and an outer armor layer 33. The armor layer 32 is provided with two layers, and the armor layer 32 is two layers. The two armor layers 32 are respectively a first armor layer 321 arranged on the inner layer and a second armor layer 323 arranged on the outer layer. The outer armor layer 33 is sleeved on the first armor layer. The outer circumference of the second armor layer 323. In one embodiment, two layers of the armor layer 32 are sleeved on the outer periphery of the plastic sheath 17 of the structural unit 10, and the inner wall of the first armor layer 321 is arranged in close contact with the plastic sheath 17 . Please refer to FIG. 2, when the structure unit 10 is set to three, the protection unit 30 further includes a lashing tape 31, and the lashing tape 31 is wrapped around the outer peripheries of the three structure units 10, and A number of filling strips 313 are filled in the binding tape 31, and the filling strips 313 are used to fill the gaps between the structural units 10.
请参阅图3和图4，在一实施方式中，所述第二铠装层323由单丝3211绞合而成，所述第二铠装层323的单丝3211与轴线之间的夹 角为5.5°-6.5°，具体的，所述第二铠装层323的单丝3211与轴线之间的夹角可以为5.5°、5.6°、5.7°、5.8°、5.9°、6.0°、6.1°、6.2°、6.3°、6.4°、6.5°中的一种。请参阅图5，在一实施方式中，组成所述铠装层32的单丝3211为截面为圆形的金属丝，并且所述金属丝的直径为5.5±0.5mm，具体的，所述金属丝的直径为5.0mm、5.1mm、5.2mm、5.3mm、5.4mm、5.5mm、5.6mm、5.7mm、5.8mm、5.9mm、6.0mm中的一种。在其他实施方式中，组成所述铠装层32的单丝3211还可以为截面为的金属丝，并且所述金属丝的截面最大宽度为7.0±0.5mm，具体的，所述单丝3211截面的单丝3211的最大宽度为6.5mm、6.6mm、6.7mm、6.8mm、6.9mm、7.0mm、7.1mm、7.2mm、7.3mm、7.4mm、7.5mm中的一种，当组成所述铠装层32的单丝3211为截面为梯形的金属丝时，所述单丝3211截面最大宽度与厚度比值为2:1。3 and 4, in one embodiment, the second armor layer 323 is formed by twisting monofilaments 3211, and the angle between the monofilaments 3211 of the second armor layer 323 and the axis is It is 5.5°-6.5°. Specifically, the included angle between the monofilament 3211 of the second armor layer 323 and the axis may be 5.5°, 5.6°, 5.7°, 5.8°, 5.9°, 6.0°, 6.1 One of °, 6.2°, 6.3°, 6.4°, 6.5°. 5, in one embodiment, the monofilament 3211 composing the armor layer 32 is a metal wire with a circular cross-section, and the diameter of the metal wire is 5.5±0.5mm. Specifically, the metal The diameter of the wire is one of 5.0mm, 5.1mm, 5.2mm, 5.3mm, 5.4mm, 5.5mm, 5.6mm, 5.7mm, 5.8mm, 5.9mm, 6.0mm. In other embodiments, the monofilament 3211 composing the armor layer 32 can also be a metal wire with a cross-section of 3, and the maximum cross-sectional width of the metal wire is 7.0±0.5 mm. Specifically, the monofilament 3211 has a cross-section The maximum width of the monofilament 3211 is one of 6.5mm, 6.6mm, 6.7mm, 6.8mm, 6.9mm, 7.0mm, 7.1mm, 7.2mm, 7.3mm, 7.4mm, 7.5mm, when forming the armor When the monofilament 3211 of the layer 32 is a metal wire with a trapezoidal cross-section, the ratio of the maximum cross-sectional width to the thickness of the monofilament 3211 is 2:1.
在一实施方式中，请参阅图3，所述第一铠装层321与轴线之间的夹角大于第二铠装层323与轴线的夹角，优选的，所述第一铠装层321与轴线之间的夹角为8.8°-10.3°，具体的，所述第一铠装层321与轴线之间的夹角可以为8.8°、8.9°、9.0°、9.1°、9.2°、9.3°、9.4°、9.5°、9.6°、9.7°、9.8°、9.9°、10.0°、10.1°、10.2°、10.3°中的一种。In one embodiment, referring to FIG. 3, the angle between the first armor layer 321 and the axis is greater than the angle between the second armor layer 323 and the axis. Preferably, the first armor layer 321 The angle between the first armor layer 321 and the axis is 8.8°-10.3°. Specifically, the angle between the first armor layer 321 and the axis may be 8.8°, 8.9°, 9.0°, 9.1°, 9.2°, 9.3° °, 9.4°, 9.5°, 9.6°, 9.7°, 9.8°, 9.9°, 10.0°, 10.1°, 10.2°, 10.3°.
并且当所述第一铠装层321与轴线之间的夹角大于第二铠装层323与轴线的夹角时，内层所述铠装层32的单丝3211根数为：And when the angle between the first armor layer 321 and the axis is greater than the angle between the second armor layer 323 and the axis, the number of monofilaments 3211 of the inner armor layer 32 is:
Figure PCTCN2020108526-appb-000003
Figure PCTCN2020108526-appb-000003
外层所述铠装层32的单丝3211的根数为：The number of monofilaments 3211 of the outer armor layer 32 is:
Figure PCTCN2020108526-appb-000004
Figure PCTCN2020108526-appb-000004
其中，所述D为结构单元10的内径，所述d 1为内层所述铠装层32的单丝3211的最大宽度，所述h 1为内层所述铠装层32的单丝3211的厚度，所述d 2为外层所述铠装层32的单丝3211的最大宽度，所述h 2为外层所述铠装层32的单丝3211的厚度。 Wherein, the D is the inner diameter of the structural unit 10, the d 1 is the maximum width of the monofilament 3211 of the inner armor layer 32 , and the h 1 is the monofilament 3211 of the inner armor layer 32 The d 2 is the maximum width of the monofilament 3211 of the outer armor layer 32, and the h 2 is the thickness of the monofilament 3211 of the outer armor layer 32.
在其他实施方式中，请参阅图4，所述第一铠装层321的单丝3211 与轴线之间的夹角和所述第二铠装层323的单丝3211与轴线之间的夹角之和等于180°，并且组成所述第一铠装层321的金属单丝3211的截面为圆形或梯形的一种。则内层所述铠装层32的单丝3211的根数为：In other embodiments, please refer to FIG. 4, the angle between the monofilament 3211 of the first armor layer 321 and the axis and the angle between the monofilament 3211 of the second armor layer 323 and the axis The sum is equal to 180°, and the cross section of the metal monofilament 3211 composing the first armor layer 321 is either circular or trapezoidal. The number of monofilaments 3211 of the inner armor layer 32 is:
Figure PCTCN2020108526-appb-000005
Figure PCTCN2020108526-appb-000005
外层所述铠装层32的单丝3211的根数为：The number of monofilaments 3211 of the outer armor layer 32 is:
Figure PCTCN2020108526-appb-000006
Figure PCTCN2020108526-appb-000006
请参阅图6，在其他实施方式中，组成所述第二铠装层323的单丝为金属丝，组成所述第一铠装层321的单丝为金属带，所述金属带绕包形成第一铠装层321，并且组成所述第一铠装层321的金属带相邻两层的重叠部分为所述金属带宽度的15％-20％。在一实施方式中，组成第一铠装层321的金属带的宽度为所述第二铠装层323的单丝3211最大宽度的10倍，所述金属带的厚度为所述第二铠装层323的单丝3211最大宽度的1/2。Please refer to FIG. 6, in other embodiments, the monofilament constituting the second armor layer 323 is a metal wire, and the monofilament constituting the first armor layer 321 is a metal tape, and the metal tape is wrapped to form The first armor layer 321, and the overlapping part of two adjacent layers of the metal tape constituting the first armor layer 321 is 15%-20% of the width of the metal tape. In one embodiment, the width of the metal tape constituting the first armor layer 321 is 10 times the maximum width of the monofilament 3211 of the second armor layer 323, and the thickness of the metal tape is the same as that of the second armor layer 323. The monofilament 3211 of the layer 323 is 1/2 of the maximum width.
所述外护层33用于在运输及深埋过程中对海底电缆100进行保护，在一实施方式中，所述外护层33采用聚丙烯，聚乙烯，聚氯乙烯等材料缠绕或者直接挤包。The outer sheath 33 is used to protect the submarine cable 100 during transportation and deep burial. In one embodiment, the outer sheath 33 is wound or directly extruded with materials such as polypropylene, polyethylene, polyvinyl chloride, etc. Bag.
本申请的另外一个目的在于提供一种海底电缆100的制备方法，请参阅图7和图8，包含以下步骤：Another purpose of the present application is to provide a method for preparing the submarine cable 100. Please refer to FIG. 7 and FIG. 8, which includes the following steps:
S1：制备结构单元10：S1: Preparation of structural unit 10:
具体的，绞合导体11，并在导体11外逐层绞合内半导电屏蔽层12、绝缘层13及外半导电屏蔽层14，在一实施方式中，所述内半导电屏蔽层12、绝缘层13及外半导电屏蔽层14三层共挤形成；然后在外半导电屏蔽层14外挤出形成半导电阻水层15并绕包形成金属屏蔽层16，最后挤出保护单元30。Specifically, the conductor 11 is twisted, and the inner semiconductive shielding layer 12, the insulating layer 13 and the outer semiconductive shielding layer 14 are twisted layer by layer outside the conductor 11. In one embodiment, the inner semiconductive shielding layer 12, The insulating layer 13 and the outer semi-conductive shielding layer 14 are co-extruded to form three layers; then the outer semi-conductive shielding layer 14 is extruded to form a semiconductive resistive water layer 15 and wrapped to form a metal shielding layer 16, and finally the protective unit 30 is extruded.
在其他实施方式中，保护单元30成型后，将结构单元10绞合，并通过填充条313填充在结构单元10的缝隙之间，再在结构单元10的外周绕包绑扎带31。In other embodiments, after the protection unit 30 is formed, the structural units 10 are twisted, and the gaps between the structural units 10 are filled with filling strips 313, and then a binding tape 31 is wrapped around the outer circumference of the structural unit 10.
S2：绞合铠装层：选用两层铠装层32，将所述第二铠装层323的绞合装置与所述第一铠装层321的绞合装置200沿所述结构单元10前进方向排列设置，并进行绞合；S2: Stranded armor layer: Two armor layers 32 are selected, and the stranding device of the second armor layer 323 and the stranding device 200 of the first armor layer 321 are advanced along the structural unit 10 Arranged in the direction and twisted;
在一实施方式中，两层铠装层32均为单丝3211绞合形成，绞合铠装层32的绞合装置200为绞体，绞合过程中，借用两节同步绞体绞合在结构单元10的外侧，所述第一铠装层321绞体的转动速度为所述第二铠装层323绞体转动速度的两倍。In one embodiment, the two armor layers 32 are formed by twisting monofilaments 3211, and the twisting device 200 for twisting the armor layer 32 is a twisted body. During the twisting process, two synchronous twisted bodies are used for twisting. Outside of the structural unit 10, the rotation speed of the twisted body of the first armor layer 321 is twice the rotation speed of the twisted body of the second armor layer 323.
在另一实施方式中，两层所述铠装层32绞体的转动速度相同。In another embodiment, the rotation speeds of the twisted bodies of the two armor layers 32 are the same.
具体的，生产过程中，先根据计算式将第一铠装层321及第二铠装层323的根数计算出来，并在绞合时，单丝3211从绞体上放置的多个单丝盘具上沿绞体内的定位通道前进，在绞合口处聚集，同时绞体在电缆前进方向上沿轴线逆时针自转，将多根单丝3211缠绕在通过绞合口的电缆上。生产中结构单元10首先进入第一铠装层321的绞体，第一铠装层321的单丝3211均匀绞合包覆在结构单元10上，随后进入第二铠装层323的绞体，第二铠装层323单丝3211均匀绞合包覆在第一铠装层321上。结构单元10通过两个绞体后即完成双层铠装层生产。在另一实施方式中，请参阅图8，所述第一铠装层321为金属带绕包形成在所述结构单元10的外周。Specifically, in the production process, first calculate the number of the first armor layer 321 and the second armor layer 323 according to the calculation formula, and when twisting, the monofilament 3211 is placed on the stranded body. The coiler advances along the positioning channel in the twisted body and gathers at the twisted opening. At the same time, the twisted body rotates counterclockwise along the axis in the cable advancing direction, winding a plurality of monofilaments 3211 on the cable passing through the twisted opening. During production, the structural unit 10 first enters the stranded body of the first armor layer 321, and the monofilament 3211 of the first armor layer 321 is evenly twisted and covered on the structural unit 10, and then enters the stranded body of the second armor layer 323, The monofilaments 3211 of the second armor layer 323 are evenly twisted and covered on the first armor layer 321. After the structural unit 10 passes through the two twisted bodies, the production of the double-layer armor layer is completed. In another embodiment, please refer to FIG. 8, the first armor layer 321 is formed by wrapping a metal tape on the outer periphery of the structural unit 10.
具体的，生产过程中，生产时结构单元10首先进入第一铠装层321绕包机，完成金属带绕包后进入第二铠装层323的绞体。先将所述第一铠装层321绕包设置在结构单元10的外周，并且在绕包过程中，将绕包的搭接比例控制为宽度的15％-20％。再将包覆有内层所述铠装层32的保护单元30放入到外层所述铠装层32的绞合装置200内。Specifically, during the production process, the structural unit 10 first enters the wrapping machine for the first armor layer 321 during production, and enters the strand of the second armor layer 323 after the metal tape is wrapped. Firstly, the first armor layer 321 is wrapped around the outer periphery of the structural unit 10, and during the wrapping process, the overlap ratio of the wrapping is controlled to be 15%-20% of the width. Then, the protection unit 30 covered with the inner armor layer 32 is put into the stranding device 200 of the outer armor layer 32.
S3：包覆外护层33：S3: Cover the outer protective layer 33:
具体的，选用高强度纤维绳绞合在铠装层外部构成外护层33，也可选用塑料挤包护层。Specifically, high-strength fiber ropes are selected to be twisted outside the armor layer to form the outer protective layer 33, or a plastic extruded protective layer can also be used.
本申请提供的一种海底电缆100，通过双层铠装层32的设置， 并通过两层铠装层32上单丝3211与中心水平线之间的角度限制，使得两层铠装层32上单丝3211之间缝隙沿轴向呈现不同的角度或方向，可以避免在尖锐物有缝隙进入到第二铠装层323的单丝3211之间的同时轻易进入到第一铠装层321的单丝3211之间的缝隙中的情况，为海缆提供了更高强度的保护，同时，可满足复杂海域环境下海缆无特殊或额外保护时的使用需要，减少常规工程对于复杂海域工况时需要进行二次填埋、重物保护和机器人防护等工作，明显节省海缆工程的成本投入。The submarine cable 100 provided in the present application is provided with a double-layer armor layer 32, and is restricted by the angle between the monofilament 3211 on the two armor layers 32 and the central horizontal line, so that the two-layer armor layer 32 has a single The gaps between the wires 3211 present different angles or directions along the axial direction, which can prevent the sharp objects from entering between the monofilaments 3211 of the second armor layer 323 while easily entering the monofilaments of the first armor layer 321. The conditions in the gap between 3211 provide higher-strength protection for the submarine cable. At the same time, it can meet the needs of the submarine cable when there is no special or additional protection in the complex sea environment, and reduce the need for conventional engineering to carry out complex sea conditions. The work of secondary landfilling, heavy object protection and robot protection has significantly reduced the cost of submarine cable engineering.
以上实施方式仅用以说明本申请实施例的技术方案而非限制，尽管参照以上较佳实施方式对本申请实施例进行了详细说明，本领域的普通技术人员应当理解，可以对本申请实施例的技术方案进行修改或等同替换都不应脱离本申请实施例的技术方案的精神和范围。The above implementation manners are only used to illustrate the technical solutions of the embodiments of the present application and not to limit them. Although the embodiments of the present application are described in detail with reference to the above preferred implementation manners, those of ordinary skill in the art should understand that the technical solutions of the embodiments of the present application can be compared. Modifications or equivalent replacements of the solutions should not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims (10)

  1. 一种海底电缆，包括结构单元及保护单元，所述保护单元设置在所述结构单元外周，其特征在于：所述保护单元包括外护层及铠装层，所述铠装层位于所述外护层及所述结构单元之间，所述铠装层设置为两层，内层所述铠装层的单丝与所述海底电缆的轴线之间的夹角大于外层所述铠装层的单丝与所述海底电缆的轴线之间的夹角，或者两层所述铠装层的单丝绞合方向相反。A submarine cable includes a structural unit and a protection unit, the protection unit is arranged on the outer periphery of the structural unit, and is characterized in that: the protection unit includes an outer sheath and an armor layer, and the armor layer is located on the outer periphery. Between the protective layer and the structural unit, the armor layer is arranged in two layers, and the angle between the monofilament of the inner layer of the armor layer and the axis of the submarine cable is larger than that of the outer layer of the armor layer The angle between the monofilament and the axis of the submarine cable, or the twisting direction of the monofilaments of the two armor layers are opposite.
  2. 根据权利要求1所述的海底电缆，其特征在于：组成外层所述铠装层的单丝为截面为圆形或梯形的金属丝，组成内层所述铠装层的单丝为截面为圆形的金属丝或截面为梯形的金属丝或金属带，并且当所述铠装层的单丝截面为梯形时，所述单丝的最大宽度与厚度的比为2:1。The submarine cable according to claim 1, wherein the monofilament constituting the outer layer of the armor layer is a metal wire with a circular or trapezoidal cross section, and the monofilament constituting the inner layer of the armor layer has a cross section of A circular metal wire or a metal wire or a metal tape with a trapezoidal cross-section, and when the monofilament of the armor layer has a trapezoidal cross-section, the ratio of the maximum width to the thickness of the monofilament is 2:1.
  3. 根据权利要求2所述的海底电缆，其特征在于：两层所述铠装层均由截面为梯形或截面为圆形的金属丝绞合形成，外层所述铠装层的单丝与所述海底电缆的轴线之间的夹角为5.5°-6.5°。The submarine cable according to claim 2, characterized in that: the two armor layers are both formed by twisting metal wires with a trapezoidal cross-section or a circular cross-section, and the monofilaments of the armor layer in the outer layer and the The angle between the axes of the submarine cables is 5.5°-6.5°.
  4. 根据权利要求3所述的海底电缆，其特征在于：内层所述铠装层的单丝与外层所述铠装层的单丝绞合方向相同，内层所述铠装层的单丝与所述海底电缆的轴线之间的夹角为8.8-10.3°。The submarine cable according to claim 3, characterized in that: the monofilaments of the inner armor layer and the monofilaments of the outer armor layer are twisted in the same direction, and the monofilaments of the inner armor layer The included angle with the axis of the submarine cable is 8.8-10.3°.
  5. 根据权利要求4所述的海底电缆，其特征在于：内层所述铠装层单丝的厚度为h 1，内层所述铠装层单丝的最大宽度为d 1，所述结构单元的外径为D，内层所述铠装层的根数为 The submarine cable according to claim 4, wherein the thickness of the armor layer monofilament in the inner layer is h 1 , the maximum width of the armor layer monofilament in the inner layer is d 1 , and the structure unit The outer diameter is D, and the number of armor layers in the inner layer is
    Figure PCTCN2020108526-appb-100001
    Figure PCTCN2020108526-appb-100001
    外层所述铠装层单丝厚度为h 2,外层所述铠装层单丝的最大宽度为d 2，外层所述铠装层的根数为： The thickness of the monofilament of the outer armor layer is h 2 , the maximum width of the monofilament of the outer armor layer is d 2 , and the number of the armor layer of the outer layer is:
    Figure PCTCN2020108526-appb-100002
    Figure PCTCN2020108526-appb-100002
  6. 根据权利要求2所述的海底电缆，其特征在于：组成内层所述铠装层的单丝为金属带，内层所述铠装层上相邻两层金属带的重叠部分宽度为所述金属带宽度的15％-20％。The submarine cable according to claim 2, wherein the monofilament constituting the inner armor layer is a metal tape, and the width of the overlapped portion of the two adjacent metal tapes on the inner armor layer is said 15%-20% of the width of the metal strip.
  7. 根据权利要求1所述的海底电缆，其特征在于：所述结构单元设置为三个，三个所述结构单元圆周阵列设置在所述保护单元内。The submarine cable according to claim 1, characterized in that there are three structural units, and the three structural units are arranged in a circumferential array in the protection unit.
  8. 一种海底电缆的制备方法，用于对权利要求1所述的海底电缆进行制备，其特征在于：包含以下步骤，A method for preparing a submarine cable for preparing the submarine cable according to claim 1, characterized in that it comprises the following steps:
    制备结构单元；Preparation of structural units;
    绞合铠装层，将内层所述铠装层与外层所述铠装层分别沿所述结构单元前进方向排列设置，并进行绞合；Twisting the armor layer, arranging the armor layer of the inner layer and the armor layer of the outer layer respectively along the advancing direction of the structural unit, and stranding;
    绞合完成后，进行外护层的包覆。After the stranding is completed, the outer protective layer is coated.
  9. 根据权利要求8所述的海底电缆的制备方法，其特征在于：绞合过程中，使用两节同步绞合装置绞合在结构单元的外侧，并且，内层所述铠装层的绞合装置的转动速度为外层所述铠装层的绞合装置转动速度的两倍或内外所述铠装层的绞合装置的转动速度相同。The method for preparing a submarine cable according to claim 8, characterized in that: in the stranding process, two synchronous stranding devices are used to twist the outer side of the structural unit, and the stranding device of the inner layer of the armor layer The rotation speed of is twice the rotation speed of the twisting device of the outer armor layer or the rotation speed of the twisting device of the armor layer inside and outside is the same.
  10. 根据权利要求8所述的海底电缆的制备方法，其特征在于：绞合过程中，先将内层所述铠装层绕包设置在所述结构单元外周，再将包覆有内层所述铠装层的保护单元放入到外层所述铠装层的绞合装置内。The method for preparing a submarine cable according to claim 8, characterized in that: in the stranding process, the armor layer of the inner layer is first wrapped around the outer periphery of the structural unit, and then the inner layer is covered with the The protection unit of the armor layer is put into the stranding device of the outer armor layer.
PCT/CN2020/108526 2020-06-28 2020-08-11 Submarine cable and preparation method therefor WO2021208304A1 (en)

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