EP3923303A1 - Câble sous-marin et son procédé de préparation - Google Patents

Câble sous-marin et son procédé de préparation Download PDF

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Publication number
EP3923303A1
EP3923303A1 EP20919372.1A EP20919372A EP3923303A1 EP 3923303 A1 EP3923303 A1 EP 3923303A1 EP 20919372 A EP20919372 A EP 20919372A EP 3923303 A1 EP3923303 A1 EP 3923303A1
Authority
EP
European Patent Office
Prior art keywords
armor layer
monofilament
layer
twisting
submarine cable
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP20919372.1A
Other languages
German (de)
English (en)
Other versions
EP3923303A4 (fr
Inventor
Hongliang Zhang
Yan Yan
Ming Hu
Zhiyu Yan
Hongmiao YU
Jianlin XUE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhongtian Technology Submarine Cable Co Ltd
Original Assignee
Zhongtian Technology Submarine Cable Co Ltd
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.)
Filing date
Publication date
Application filed by Zhongtian Technology Submarine Cable Co Ltd filed Critical Zhongtian Technology Submarine Cable Co Ltd
Publication of EP3923303A1 publication Critical patent/EP3923303A1/fr
Publication of EP3923303A4 publication Critical patent/EP3923303A4/fr
Pending legal-status Critical Current

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Classifications

    • 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

  • the disclosure relates to a technical field of undersea power and signal cable, in particular to a submarine cable and a manufacturing method thereof.
  • High-voltage AC and DC submarine cables are configured for marine power transmission. They have characteristics different from those of land power cables.
  • the delivery length of submarine cables can reach hundreds of kilometers.
  • Transportation and construction of submarine cables after production need to be handled 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 submarine cables requires high axial mechanical tensile strength.
  • multiple metal wires with high tensile strength are generally used as the outer layer of the submarine cable sheath to meet the axial tension requirements.
  • a submarine cable including a structural unit and a protection unit, the protection unit is positioned at an outer periphery of the structural unit.
  • the protection unit comprises an outer protective layer and an armor layer, the armor layer is positioned between the outer protective layer and the structural layer, the armor layer comprises an inner armor layer and an outer armor layer.
  • the angle between a spiraled or twisted monofilament of the inner armor layer and the axis of the submarine cable is larger than an angle between a spiraled or twisted monofilament of the outer armor layer and the axis of the submarine cable; or the angle between the twisted monofilament of the inner armor layer and the axis of the submarine cable is opposite to the angle between the twisted monofilament of the outer armor layer and the axis of the submarine cable.
  • the angles referred to are those existing between a notional central axis of the cable and a monofilament crossing the central axis on a tangential plane of the inner armor layer or of the outer armor layer of the cable.
  • the monofilament of the outer armor layer is a metal wire with a circular or trapezoidal cross-section
  • the monofilament of the inner armor layer is a metal wire with a circular cross-section
  • the monofilament of the inner armor layer is a metal tape or metal wire with a trapezoidal cross-section. If the cross-section of the monofilament is a trapezoid, the ratio of the maximum cross-sectional width to the thickness of the monofilament is 2:1.
  • the inner armor layer and the outer armor layer are formed by twisting metal wires with circular cross-section or trapezoidal cross-section, the angle between the monofilament when twisted or spiraled and an axis of the submarine cable is 5.5-6.5 degrees.
  • the angle between the monofilament of the inner armor layer and the axis of the submarine cable is 8.8-10.3 degrees.
  • D is an inner diameter of the structural unit
  • d1 is a maximum width of the monofilament of the inner armor layer
  • h1 is a thickness of the monofilament of the inner armor layer.
  • n 2 ⁇ ⁇ D + 2 h 1 + h 2 d 2 ⁇ 1 .
  • the monofilaments of the inner armor layer are metal tapes, an overlapped part of two adjacent layers of the metal tape is 15%-20% of the width of the metal tape.
  • the present disclosure further discloses a manufacturing method of the submarine cable, the manufacturing method includes:
  • two synchronous twisting devices are positioned at an outside of the structural unit, and a rotation speed of the twisting devices for twisting the inner armor layer is twice a rotation speed of the twisting device for twisting the outer armor layer.
  • the rotation speed of the twisting devices for twisting the inner armor layer can also be the same as the rotation speed of the twisting device for twisting the outer armor layer.
  • the inner armor layer is wrapped on an outer periphery of the structural unit, and then the protective unit carrying the inner armor layer is positioned in the twisting device of the outer armor layer.
  • the above-mentioned submarine cable includes a double-layer armor layer, and angles between the monofilaments of the two armor layers and the center axis of the submarine cable are controlled, so that gaps between the monofilaments of the two armor layers have different angles or axial directions. Penetration by sharp objects is prevented as gaps of the outer armor layer and gaps of the inner armor layer are not aligned, the protective monofilaments effectively function as a solid barrier and give greater protection for the submarine cable.
  • submarine cable 100 submarine cable 100; structural unit 10; conductor 11; inner semi-conductive shielding layer 12; insulation layer 13; outer semi-conductive shielding layer 14; semi-conductive waterproof layer15; metal shielding layer 16; plastic sheath 17; protection unit 30; strapping tape 31; optical unit 311; filler 313; armor layer 32; first armor layer; second armor layer 323; monofilament 3211; outer protective layer 33; twisted device 200.
  • the present disclosure provides a submarine cable, including a number of structural units and a protection unit.
  • the protection unit is positioned at an outer periphery of the structural unit.
  • the protection unit includes an outer protective layer and an armor layer positioned at the outer periphery.
  • the armor layer is positioned between the outer protective layer and the structural unit.
  • the armor layer includes an inner armor layer and an outer armor layer.
  • An angle between a twisted monofilament of the inner armor layer and the axis of the submarine cable is larger than an angle between a twisted monofilament of the outer armor layer and the axis of the submarine cable; or the angle between the monofilament of the inner armor layer and the axis of the submarine cable is opposite to the angle between the monofilament of the outer armor layer and the axis of the submarine cable.
  • the present disclosure also provides a manufacturing method for manufacturing the above-mentioned submarine cable.
  • the manufacturing method including the following steps:
  • the armor layer includes an inner armor layer and an outer armor layer, and a twisting device of the outer armor layer and a twisting device of the inner armor layer are positioned in a row along direction of advancement of the structural unit, and the inner armor layer and the outer armor layer are twisted by the twisting devices;
  • an outer protective layer is applied as a coating.
  • the above-mentioned submarine cable includes a double-layer armor layer, and angles between the monofilaments of the two armor layers and the center axis of the submarine cable are controlled, so that gaps between the monofilaments of the two armor layers have different angles or axial directions. Therefore, sharp objects can be prevented from entering gaps between the monofilaments of the outer armor layer and gaps between the monofilaments of the inner armor layer at the same time.
  • the protection for the submarine cable is improved.
  • a submarine cable 100 includes a number of structural units 10 and a protection unit 30.
  • the protection unit 30 is positioned at an outer periphery of the structural units 10.
  • the protection unit 30 is configured to protect the structural unit 10.
  • one structural unit 10 is positioned in the submarine cable 100.
  • the structural unit 10 includes a conductor 11, an inner semi-conductive shielding layer 12, an insulation layer 13, an outer semi-conductive shielding layer 14, a semi-conductive waterproof layer15, a metal shielding layer 16, and a plastic sheath 17.
  • the conductor 11, the inner semi-conductive shielding layer 12, the insulation layer 13, the outer semi-conductive shielding layer 14, the semi-conductive waterproof layer15, the metal shielding layer 16, and the plastic sheath 17 are positioned in that order from the inside to the outside.
  • the conductor 11 is configured to carry current.
  • the conductor 11 is a solid conductor 11.
  • the conductor 11 may also be one of a round single-wire stranded conductor 11, a shaped wire conductor 11, and a split conductor 11.
  • the inner semi-conductive shielding layer 12 and the outer semi-conductive shielding layer 14 are both formed of extruded semi-conductive materials.
  • the inner semi-conductive shielding layer 12 is configured 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.
  • the outer semi-conductive shielding layer 14 is configured to create a uniform electric field and prevent partial discharge caused by a gap between the insulation layer 13 and the metal shielding layer 16.
  • the insulating layer 13 is made of lightweight polyethylene to provide insulation.
  • the semi-conductive waterproof layer 15 includes an annular corrugated metal sheath and a water blocking material, and the water blocking material is coated onto an outer wall of the annular corrugated metal sheath.
  • the metal shielding layer 16 is configured to improve shielding of the submarine cable 100 against EMI.
  • the metal shielding layer 16 is formed by wrapping copper tape.
  • the plastic sheath 17 is configured for protecting against compression, waterproofing, and connection and unloading protection.
  • the plastic sheath 17 is an polyethylene jacket formed by extrusion.
  • the quantity of the structural units 10 may also be three, and the three structural units 10 are positioned in a circular array in the protection unit 30. In other embodiments, the quantity of the structural units 10 may be different, and an optical unit 311 can be added in a gap of the protection unit 30 according to functional requirements.
  • the protection unit 30 when the quantity of the structural units 10 is one, the protection unit 30 includes an armor layer 32 and an outer protective layer 33.
  • the armor layer 32 is provided with two layers, and the two armor layers 32 are positioned in contact with each other.
  • the two armor layers 32 includes a first armor layer 321 positioned on an inner layer and a second armor layer 323 positioned on an outer layer.
  • the outer armor layer 33 is sleeved on an outer circumference of the second armor layer 323.
  • two layers of the armor layer 32 are sleeved on an outer circumference of the plastic sheath 17 of the structural unit 10, and an inner wall of the first armor layer 321 is positioned in contact with the plastic sheath 17.
  • the protection unit 30 further includes a strapping tape 31, and the strapping tape 31 is wrapped around outer peripheries of the three structure units 10.
  • a number of fillers 313 are filled in the strapping tape 31, and the filler 313 are configured to fill gaps between the structural units 10.
  • the second armor layer 323 is formed by twisting monofilaments 3211.
  • An angle between the monofilament 3211 of the second armor layer 323 and center axis of the cable is 5.5-6.5 degrees. Specifically, the angle may be one of 5.5°, 5.6°, 5.7°, 5.8°, 5.9°, 6.0°, 6.1°, 6.2°, 6.3°, 6.4°, and 6.5°.
  • the monofilament 3211 is a metal wire with a circular cross-section, and a diameter of the metal wire is 5.5 ⁇ 0.5mm.
  • the diameter of the metal wire may be one of 5.0 mm, 5.1 mm, 5.2 mm, 5.3 mm, 5.4 mm, 5.5 mm, 5.6 mm, 5.7 mm, 5.8 mm, 5.9 mm, and 6.0 mm.
  • the monofilament 3211 may also be a metal wire with a polygonal cross-section, and the maximum cross-sectional width of the metal wire is 7.0 ⁇ 0.5mm.
  • the maximum cross-sectional width of the monofilament 3211 may be one of 6.5 mm, 6.6 mm, 6.7 mm, 6.8 mm, 6.9 mm, 7.0 mm, 7.1 mm, 7.2 mm, 7.3 mm, 7.4 mm, and 7.5 mm.
  • the ratio of the maximum cross-sectional width to the thickness of the monofilament 3211 is 2:1.
  • the angle between monofilament of the first armor layer 321 and center axis of the cable is greater than the angle between the monofilament of the second armor layer 323 and center axis.
  • the angle between the monofilament of the first armor layer 321 and center axis of the cable is 8.8°-10.3°.
  • a twisting direction of the monofilament of the first armor layer 321 can be same as a twisting direction of the monofilament of the second armor layer 323.
  • the angle between the first armor layer 321 and center axis of the cable may be one of 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°, and 10.3°.
  • n 1 ⁇ ⁇ D + h 1 2 d 1 ⁇ 1 ;
  • n 2 ⁇ ⁇ D + 2 h 1 + h 2 d 2 ⁇ 1
  • D is the inner diameter of the structural unit 10.
  • the d1 is the maximum width of the monofilament 3211 of the inner armor layer 32, and the h1 is the thickness of the monofilament 3211 of the inner armor layer 32.
  • the d2 is the maximum width of the monofilament 3211 of the outer armor layer 32, and the h2 is the thickness of the monofilament 3211 of the outer armor layer 32.
  • FIG. 4 shows another embodiment.
  • the sum of the angle between monofilament 3211 of the first armor layer 321 and the axis and the angle between monofilament 3211 of the second armor layer 323 and the axis is equal to 180°, and the cross section of the monofilament 3211 of the first armor layer 321 is either circular or trapezoidal.
  • n 2 ⁇ ⁇ D + 2 h 1 + h 2 d 2 ⁇ 1 .
  • the monofilaments of the second armor layer 323 are metal wires
  • the monofilaments of the first armor layer 321 are metal tapes
  • the metal tapes are wrapped to form the first armor layer 321.
  • the overlapped part of two adjacent layers of the metal tape is 15%-20% of the width of the metal tape.
  • the width of the metal tape of the first armor layer 321 is ten times the maximum width of the monofilament 3211 of the second armor layer 323, and the thickness of the metal tape is 1/2 of the maximum width of the monofilament 3211 of the second armor layer 323.
  • the outer protective layer 33 is configured to protect the submarine cable 100 during transportation and deep water depositing process.
  • the outer protective layer 33 is wound or directly extruded with materials such as polypropylene, polyethylene, polyvinyl chloride, etc..
  • the present disclosure further discloses a manufacturing method for preparing the submarine cable 100.
  • the manufacturing method includes the following steps: S1: preparing the structural unit 10: Specifically, the conductor 11 is twisted; the inner semi-conductive shielding layer 12, the insulation layer 13, and the outer semi-conductive shielding layer 14 are twisted around the conductor 11 by order.
  • the inner semi-conductive shielding layer 12, the insulation layer 13 and the outer semi-conductive shielding layer 14 are co-extruded to form the three layers, then the semi-conductive waterproof layer 15 is extruded at an outside surface of the outer semi-conductive shielding layer 14, a metal shielding layer 16 is wrapped to the semi-conductive waterproof layer 15, and an outer protective layer 33 of the protection unit 30 is extruded as an outer surface layer of the cable.
  • the structural unit 10 is twisted, and gaps between structural unit 10 and the protection unit 30 are filled with fillers 313, and then a strapping tape 31 is wrapped around the outer periphery of the structural unit 10 and the filler 313.
  • twisting armor layer two armor layers 32 are selected, and a twisting device 200 of the second armor layer 323 and a twisting device 200 of the first armor layer 321 are positioned in a row along an advancing direction of the structural unit 10, and the first armor layer 321 and the second armor layer 323 are 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 strander.
  • the twisting device 200 for twisting the armor layer 32 is a strander.
  • two synchronous stranders are positioned at the outside of the structural unit 10, and a rotation speed of strander for twisting the first armor layer 321 is twice a rotation speed of strander for twisting the second armor layer 323.
  • the rotation speeds of the two stranders are the same.
  • the quantity of the first armor layer 321 and the second armor layer 323 are calculated according to the calculation formula.
  • the monofilaments 3211 advances from a monofilament drum placed on the strander along a positioning channel in the strander, and gathers at a twisted opening.
  • the strander rotates counterclockwise along the axis in the cable advancing direction, a plurality of monofilaments 3211 are twisted on the cable passing through the twisted opening.
  • the structural unit 10 first enters the strander of the first armor layer 321, the monofilament 3211 of the first armor layer 321 is evenly twisted and covered on the structural unit 10, and the structural unit 10 then enters the strander 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 stranders, 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 a winding machine for wrapping the metal tape to form the first armor layer 321, and then enters the strander of the second armor layer 323 after the metal tape is wrapped.
  • the first armor layer 321 is wrapped around the outer circumference of the structural unit 10, the overlap ratio of the wrapping is controlled to be 15%-20% of the width of the metal tape, and then the protective unit 30 with the first armor layer 321 is positioned in the twisting device of the second armor layer 323.
  • S3 coating the outer protective layer 33: Specifically, high-strength fiber ropes are selected to be twisted outside the armor layer to form the outer protective layer 33, or a plastic material may be extruded to from the outer protective layer 33.
  • the submarine cable 100 in the present disclosure includes a double-layer armor layer 32. Angles between the monofilaments 3211 of the two armor layers 32 and the center axis of the submarine cable are controlled, so that gaps between the monofilaments 3211 of the two armor layers have different angles or axial directions. Penetration by sharp objects is prevented as gaps of the outer armor layer and gaps of the inner armor layer are not aligned, the protective monofilaments effectively function as a solid barrier and give greater protection for the submarine cable. The protection for the submarine cable is improved.
  • submarine cables of the present disclosure can be meet the operation requirements. The need for secondary landfilling, heavy object protection and robot protection in conventional engineering for complex sea area conditions is also reduced, which significantly saves the cost of submarine cable engineering.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulated Conductors (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
EP20919372.1A 2020-06-28 2020-08-11 Câble sous-marin et son procédé de préparation Pending EP3923303A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010601004.0A CN111613376B (zh) 2020-06-28 2020-06-28 海底电缆及其制备方法
PCT/CN2020/108526 WO2021208304A1 (fr) 2020-06-28 2020-08-11 Câble sous-marin et son procédé de préparation

Publications (2)

Publication Number Publication Date
EP3923303A1 true EP3923303A1 (fr) 2021-12-15
EP3923303A4 EP3923303A4 (fr) 2022-10-12

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Application Number Title Priority Date Filing Date
EP20919372.1A Pending EP3923303A4 (fr) 2020-06-28 2020-08-11 Câble sous-marin et son procédé de préparation

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EP (1) EP3923303A4 (fr)
CN (1) CN111613376B (fr)
WO (1) WO2021208304A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111613376B (zh) * 2020-06-28 2021-06-29 中天科技海缆股份有限公司 海底电缆及其制备方法

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IT1163902B (it) * 1982-08-17 1987-04-08 Chevron Res Tubo ermeticamente chiuso incorporante una fibra ottica e circondato da un cavo armato
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CN103137264B (zh) * 2013-03-26 2016-02-17 金杯电工衡阳电缆有限公司 一种轨道交通用环保型中压供电电缆
CN203607132U (zh) * 2013-08-22 2014-05-21 杭州电缆股份有限公司 一种型线阻水导体高压直流海底电缆
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CN209461210U (zh) * 2019-04-24 2019-10-01 江苏亨通海洋光网系统有限公司 一种轻型裸铠电缆
CN110706849A (zh) * 2019-10-28 2020-01-17 湖北力生电缆有限公司 一种塑钢钢带重叠绕包铠装电缆
CN111276285B (zh) * 2020-03-11 2021-07-13 远东电缆有限公司 一种超深井矿用垂吊敷设电缆及其生产工艺
CN111613376B (zh) * 2020-06-28 2021-06-29 中天科技海缆股份有限公司 海底电缆及其制备方法

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CN111613376B (zh) 2021-06-29
CN111613376A (zh) 2020-09-01
EP3923303A4 (fr) 2022-10-12
WO2021208304A1 (fr) 2021-10-21

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