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WO2025086871A1 - Câble sous-marin pour eau ultraprofonde - Google Patents

Câble sous-marin pour eau ultraprofonde Download PDF

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Publication number
WO2025086871A1
WO2025086871A1 PCT/CN2024/114632 CN2024114632W WO2025086871A1 WO 2025086871 A1 WO2025086871 A1 WO 2025086871A1 CN 2024114632 W CN2024114632 W CN 2024114632W WO 2025086871 A1 WO2025086871 A1 WO 2025086871A1
Authority
WO
WIPO (PCT)
Prior art keywords
cable
ultra
submarine cable
shaped portion
arc
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
PCT/CN2024/114632
Other languages
English (en)
Chinese (zh)
Inventor
景洋
潘盼
蓝子源
谭少杰
邵鹏进
曹彬彬
李海军
张小龙
赵囿林
胡明
谢书鸿
朱井华
曹凯
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.)
South Sea Submarine Cable Co Ltd
Zhongtian Dafeng Submarine Cable Co Ltd
Jiangsu Zhongtian Technology Co Ltd
Zhongtian Technology Submarine Cable Co Ltd
Original Assignee
South Sea Submarine Cable Co Ltd
Zhongtian Dafeng Submarine Cable Co Ltd
Jiangsu Zhongtian Technology Co Ltd
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 South Sea Submarine Cable Co Ltd, Zhongtian Dafeng Submarine Cable Co Ltd, Jiangsu Zhongtian Technology Co Ltd, Zhongtian Technology Submarine Cable Co Ltd filed Critical South Sea Submarine Cable Co Ltd
Publication of WO2025086871A1 publication Critical patent/WO2025086871A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01B7/02—Disposition of insulation
    • 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
    • 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
    • H01B7/20—Metal tubes, e.g. lead sheaths
    • 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
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable

Definitions

  • the present application relates to the technical field of deep-sea cables, and in particular to a submarine cable for ultra-deep waters.
  • metal armored cables In marine scientific research, winding winches and metal armored cables are usually used to carry underwater submersibles and detection equipment to conduct environmental detection and resource sample collection in various areas of the ocean. In actual use, metal armored cables not only bear their own weight, but also are affected by the drag force from underwater submersibles. The greater the water depth, the greater the force on the armor layer. At the same time, the corrosion failure of the armor layer in seawater will also increase the risk of failure in deep-sea detection.
  • the sea area with a depth greater than 6500m is called the hadal zone, which accounts for 1.2% of the total ocean area and is one of the last unexplored areas on Earth.
  • dynamic submarine optoelectronic composite submarine cables connecting floating structures and underwater equipment need to solve problems such as their own gravity and large water pressure circumferential extrusion, as well as metal armor failure under repeated environmental loads.
  • Existing submarine cables are mainly used within 1000 meters of water depth, and there are few practical applications exceeding 1000 meters of water depth.
  • the armor layer of the submarine cable needs to withstand great tension when it is laid in deep water. If the strength of the armor layer is not enough, yield failure will occur, affecting the normal use of the submarine cable.
  • the present application provides a submarine cable for ultra-deep waters, which is used to solve the defects in the prior art that when the submarine cable is used in ultra-deep waters, there is air inside the submarine cable, which causes a pressure difference between the inside and outside of the submarine cable, resulting in the submarine cable being easily crushed and failing, and the filling strips and the cable core being easily crushed and damaged.
  • the present application provides an ultra-deepwater submarine cable, comprising: a plurality of cable cores, a plurality of preformed filling
  • the plurality of cable cores are tightly twisted together, the plurality of preformed filling strips are arranged in the gaps between the plurality of cable cores, and the outer protective structure is wrapped around the periphery of the plurality of cable cores and the plurality of preformed filling strips.
  • the preformed filling strip is provided with a cavity extending along its length direction and through holes arranged at intervals along its length direction, the through holes radially penetrate into the cavity, and the outer protective structure is provided with flow holes arranged at intervals along its length direction, and the gap between the cable cores and the cavity of the preformed filling strip are connected to the outside of the outer protective structure via the flow holes.
  • seawater When ultra-deepwater submarine cables are laid in seawater, seawater can enter the gaps between multiple cable cores and the cavities of preformed filling strips through the flow holes on the outer protective structure, allowing the air inside the submarine cable to be discharged smoothly, thereby avoiding the accumulation of air pressure and causing bulging damage to the structure, ensuring the normal laying of the submarine cable; in addition, the cavity of the preformed filling strip is filled with seawater, the internal and external pressures of the submarine cable are balanced, and the internal structure of the submarine cable will not be flattened, which can ensure the normal transmission of electricity and extend the service life of the submarine cable.
  • the number of the cable cores is three
  • the number of the preformed filling strips is three
  • the three cable cores are tightly arranged along the circumferential direction of the ultra-deepwater submarine cable
  • the three preformed filling strips are sequentially and spaced and filled between two adjacent cable cores
  • the three preformed filling strips and the three cable cores together roughly form a cylindrical structure.
  • the inner wall of the preformed filling strip can fit with the cable core to position and support the cable core.
  • the three preformed filling strips and the three cable cores together roughly form a cylindrical structure, which facilitates the outer protective structure to be sheathed on the outside.
  • the preformed filling strip includes a first arc-shaped portion, a second arc-shaped portion and an outer arc-shaped portion which are sequentially connected end to end, the first arc-shaped portion and the second arc-shaped portion are respectively used to fit two adjacent cable cores, the cavity is arranged in the first arc-shaped portion, the second arc-shaped portion and the outer arc-shaped portion, the through hole is arranged on the outer arc-shaped portion, and the flow hole of the outer protective structure is connected to the cavity via the through hole of the outer arc-shaped portion.
  • the cross-sections of the first arc-shaped portion and the second arc-shaped portion are roughly constructed as circular arcs.
  • the first arc-shaped portion and the second arc-shaped portion can be respectively adapted to fit to the outer walls of two adjacent cable cores.
  • the cross-section of the outer arc-shaped portion is also roughly constructed as circular arcs.
  • the outer arc-shaped portions of the three preformed filling strips can jointly form a roughly cylindrical outer wall structure to facilitate the outer protective structure to be arranged on the outside of the three preformed filling strips.
  • a first reinforcing rib is arranged between the first arc-shaped portion and the outer arc-shaped portion
  • a second reinforcing rib is arranged between the second arc-shaped portion and the outer arc-shaped portion
  • the first reinforcing rib and the second reinforcing rib divide the cavity into three isolation cavities
  • the outer arc-shaped portion is respectively provided with the through hole corresponding to each of the isolation cavities.
  • the first reinforcing rib and the second reinforcing rib can be respectively extended in the radial direction of the submarine cable, and the first reinforcing rib and the second reinforcing rib are spaced apart in the circumferential direction of the submarine cable, and the cavity inside the preformed filling strip is sequentially divided into three isolation cavities by the first reinforcing rib and the second reinforcing rib, so that the preformed filling strip can be prevented from being squeezed and deformed under the external force of seawater.
  • the cable core comprises: a water-blocking conductor, And a conductor shielding layer, a cross-linked polyethylene insulation layer, an insulation shielding layer, an inner semiconductor water-blocking tape wrapping layer, a metal shielding layer, an outer semiconductor water-blocking tape wrapping layer, an aluminum-plastic composite tape layer and a phase-separated sheath are sequentially arranged on the outer periphery of the water-blocking conductor.
  • the outer periphery of the water-blocking conductor can be extruded with a conductor shielding layer, the outer periphery of the conductor shielding layer can be provided with a cross-linked polyethylene insulation layer, the outer periphery of the cross-linked polyethylene insulation layer can be provided with an insulating shielding layer, the outer periphery of the insulating shielding layer can be wrapped with an inner layer of semi-conductive water-blocking tape wrapping layer, the outer periphery of the inner layer of semi-conductive water-blocking tape wrapping layer can be wrapped with a metal shielding layer, the outer periphery of the metal shielding layer can be wrapped with an outer layer of semi-conductive water-blocking tape wrapping layer, the outer periphery of the outer layer of semi-conductive water-blocking tape wrapping layer can be longitudinally wrapped with an aluminum-plastic composite tape layer, and finally, a phase-separated sheath can be extruded and adhered to the outer periphery of the aluminum-plastic composite tape layer,
  • a cable wrapping tape is provided on the outer periphery of the cable core and the preformed filling strip.
  • Preformed filling strips are arranged in the gaps between the three cable cores during cabling.
  • cabling tapes can be used to tightly bind the three cable cores and the preformed filling strips so as to ensure the roundness of the entire structure after cabling.
  • the outer protective structure includes an inner sheath, a first armor layer, a first armor tape, a second armor layer, a second armor tape and an outer sheath which are sequentially arranged on the cable core and the periphery of the preformed filling strip.
  • the inner sheath can be extruded around the periphery of the cabling tape, the first armor layer can be arranged on the periphery of the inner sheath, the first armor tape can be arranged on the periphery of the first armor layer, the second armor layer can be arranged on the periphery of the first armor tape, the second armor tape can be arranged on the periphery of the second armor layer, and finally, the outer sheath is extruded around the periphery of the second armor tape to further achieve a new protective effect of the cable.
  • the flow hole of the outer protective structure includes a first through hole arranged on the inner sheath and a second through hole arranged on the outer sheath.
  • the cavity in the preformed filling strip can be connected to the outside of the outer protective structure by means of the first through hole on the inner jacket and the second through hole on the outer jacket, so that external seawater can enter the cavity in the preformed filling strip through the second through hole and the first through hole.
  • the steel wires in the first armor layer and the steel wires in the second armor layer have opposite twisting directions.
  • the outer protection structure adopts an armored structure with multiple layers of high-strength steel wires, which can withstand the huge tension during installation and laying, and can meet the requirements of deep water use.
  • the even-numbered layers of anisotropically twisted metal armor can meet the torque balance design requirements.
  • the stress and deformation of each layer are consistent, which can improve the tensile strength.
  • the steel wires in the first armor layer and the steel wires in the second armor layer are designed as high-strength steel wires.
  • the first armor layer and the second armor layer jointly bear the tension during the installation of the submarine cable, and also have good corrosion resistance.
  • the ultra-deepwater submarine cable provided by the present application is provided with an outer protective structure on the outer periphery of multiple cable cores and multiple preformed filling strips, the preformed filling strips are provided with cavities and through holes arranged at intervals along the length direction thereof and radially penetrating into the cavities, and the outer protective structure is provided with flow holes, so that when the ultra-deepwater submarine cable is laid and placed in the deep sea, seawater can enter the multiple cables through the flow holes.
  • the gaps between the cable cores and the cavities of the preformed filling strips allow the air inside the submarine cable to be completely discharged, so that the pressure inside and outside the submarine cable is balanced, avoiding the internal structure of the submarine cable from being crushed, thereby increasing the service life of the submarine cable.
  • the entire ultra-deepwater submarine cable adopts a lightweight structure design, which can reduce the overall outer diameter and deadweight, while also reducing material consumption and costs, and has certain economic benefits.
  • FIG1 is a schematic structural diagram of an ultra-deepwater submarine cable according to an embodiment of the present application.
  • FIG2 is a schematic diagram of the structure of a preformed filling strip in the ultra-deepwater submarine cable in FIG1 ;
  • FIG3 is a schematic diagram of the three-dimensional structure of the preformed filling strip in the ultra-deepwater submarine cable in FIG1 ;
  • FIG4 is a schematic diagram of the structure of the inner sheath in the ultra-deepwater submarine cable in FIG1;
  • FIG. 5 is a schematic diagram of the structure of the outer sheath in the ultra-deepwater submarine cable in FIG. 1 .
  • the ocean accounts for about 71% of the earth's surface.
  • the ocean is rich in energy resources such as oil, gas, natural gas hydrates and solid minerals. It is an important energy security base and strategic activity space for centuries. Among them, rich oil and mineral resources are often located several thousand meters underwater.
  • the sea area with a depth of more than 6500m in the ocean is called the hadal zone.
  • the hadal zone is one of the last undeveloped areas on the earth by humans.
  • underwater drilling equipment In order to achieve seabed detection and energy resource exploitation, underwater drilling equipment is needed. When using underwater drilling equipment, it is necessary to transmit electricity from the oil and gas platform to the underwater drilling equipment through submarine cables that meet the water depth. Submarine cables will face deep water squeezing in the deep sea, which can easily cause structural deformation and failure accidents.
  • an ultra-deep water submarine cable is provided, and the ultra-deep water submarine cable can be used to transmit electrical energy to underwater drilling and production equipment.
  • the ultra-deepwater submarine cable comprises a plurality of cable cores, a plurality of preformed filling strips and an outer protective structure.
  • the preformed filling strips are provided with cavities and through holes, and the outer protective structure is provided with flow holes. After entering the deep sea, seawater can enter the cavity of the preformed filling strip through the flow hole, so that the pressure inside and outside the submarine cable is balanced, avoiding the internal structure of the submarine cable from being crushed, thereby increasing the service life of the submarine cable.
  • the ultra-deepwater submarine cable in this embodiment is further described below in conjunction with Figures 1 to 5.
  • the ultra-deepwater submarine cable in this embodiment includes: a plurality of cable cores 10 , a plurality of preformed filling strips 20 and an outer protective structure 30 .
  • the plurality of cable cores 10 are tightly twisted together, the plurality of preformed filling strips 20 are arranged in the gaps between the plurality of cable cores 10 , and the outer protective structure 30 is wrapped around the periphery of the plurality of cable cores 10 and the plurality of preformed filling strips 20 .
  • the cable core 10 is configured as a long strip, and a powered conductor is arranged inside the cable core, which can be used to transmit electric energy, and multiple cable cores 10 are tightly twisted and installed at the center of the ultra-deepwater submarine cable.
  • the preformed filling strip 20 is arranged close to the cable core 10, which can fill the gap between the cable cores 10, and can play a role in positioning and supporting the cable core 10.
  • the outer protective structure 30 is generally constructed as a long cylindrical structure, and the cable core 10 and the preformed filling strip 20 are both arranged inside the outer protective structure 30. When the ultra-deepwater submarine cable is placed in the deep sea, the outer protective structure 30 can directly contact the seawater, which can protect the cable core 10.
  • the preformed filling strip 20 is provided with a cavity extending along its length direction and through holes 24 arranged at intervals along its length direction.
  • the through holes 24 radially penetrate into the cavity.
  • the outer protective structure 30 is provided with flow holes arranged at intervals along its length direction.
  • the cavity of the preformed filling strip 20 is connected to the outside of the outer protective structure 30 via the flow holes.
  • the preformed filling strip 20 has a hollow structure, and the cavity in the preformed filling strip 20 extends along the length direction of the ultra-deepwater submarine cable, and the cavity of the preformed filling strip 20 can be connected to the outside by means of the through hole 24 and the flow hole on the outer protective structure 30.
  • the ultra-deepwater submarine cable has a certain length
  • the through holes 24 are sequentially arranged at intervals along the length direction of the preformed filling strip 20, and the flow holes are sequentially arranged at intervals along the length direction of the outer protective structure 30.
  • seawater can enter the gaps between multiple cable cores and the cavities of the preformed filling strips 20 through the flow holes on the outer protective structure 30, allowing the air inside the submarine cable to be discharged smoothly, thereby avoiding air pressure accumulation and causing bulging damage to the structure, thereby ensuring the normal laying of the submarine cable.
  • the ultra-deepwater submarine cable in this embodiment When the ultra-deepwater submarine cable in this embodiment is laid in the seawater, the cavity of the preformed filling strip 20 is filled with seawater, the internal and external pressures of the submarine cable are balanced, and the internal structure of the submarine cable will not be flattened, which can ensure the normal transmission of electricity and extend the service life of the submarine cable.
  • the number of cable cores 10 is three
  • the number of preformed filling strips 20 is three
  • the three cable cores 10 are tightly arranged along the circumferential direction of the ultra-deepwater submarine cable
  • the three preformed filling strips 20 are sequentially filled between two adjacent cable cores 10 at intervals.
  • the three preformed filling strips 20 and the three cable cores 10 together form a roughly cylindrical structure.
  • three cable cores 10 can be tightly arranged around the central axis of the submarine cable.
  • the cable core 10 is roughly a long cylindrical structure.
  • the inner wall of the preformed filling strip 20 can be aligned with the cable core 10.
  • the core 10 fits tightly to position and support the cable core 10.
  • the outer wall of the preformed filling strip 20 can be roughly configured as an arc shape.
  • the three preformed filling strips 20 and the three cable cores 10 are roughly formed into a cylindrical structure, so that the outer protective structure 30 is conveniently sleeved on the outside.
  • the preformed filling strip 20 includes a first arc-shaped portion 21, a second arc-shaped portion 22 and an outer arc-shaped portion 23 which are connected end to end in sequence, and the first arc-shaped portion 21 and the second arc-shaped portion 22 are respectively used to fit two adjacent cable cores 10.
  • the first arc-shaped portion 21, the second arc-shaped portion 22 and the outer arc-shaped portion 23 are connected end to end in sequence to form a cavity inside, and a through hole 24 is provided on the outer arc-shaped portion 23.
  • the flow hole of the outer protective structure 30 is connected to the cavity via the through hole 24 of the outer arc-shaped portion 23.
  • first arc-shaped portion 21 and the second arc-shaped portion 22 are roughly constructed as circular arcs, and the first arc-shaped portion 21 and the second arc-shaped portion 22 can be respectively adapted to fit to the outer walls of two adjacent cable cores 10, and the cross-section of the outer arc-shaped portion 23 is also roughly constructed as circular arcs.
  • the outer arc-shaped portions 23 of each of the three preformed filling strips 20 can jointly form a roughly cylindrical outer wall structure to facilitate the outer protective structure 30 to be set on the outside of the three preformed filling strips 20.
  • a first reinforcing rib 25 is arranged between the first arc portion 21 and the outer arc portion 23, and a second reinforcing rib 26 is arranged between the second arc portion 22 and the outer arc portion 23.
  • the first reinforcing rib 25 and the second reinforcing rib 26 divide the cavity into three isolation cavities, and the outer arc portion 23 is respectively provided with a through hole 24 corresponding to each isolation cavity.
  • first reinforcing rib 25 and the second reinforcing rib 26 can be respectively extended in the radial direction of the submarine cable, and the first reinforcing rib 25 and the second reinforcing rib 26 are spaced apart in the circumferential direction of the submarine cable, and the cavity inside the preformed filling strip 20 is divided into three isolation cavities in sequence by the first reinforcing rib 25 and the second reinforcing rib 26.
  • the cavity inside the preformed filling strip 20 is divided into a first isolated cavity 27 , a second isolated cavity 28 , and a third isolated cavity 29 .
  • the outer arc-shaped portion 23 is respectively provided with a through hole 24 corresponding to each isolation chamber.
  • each outer arc-shaped portion 23 is sequentially provided with three through holes 24 in the circumferential direction of the submarine cable.
  • the cable core 10 includes: a water-blocking conductor 11, and a conductor shielding layer 12, a cross-linked polyethylene insulation layer 13, an insulation shielding layer 14, an inner semiconductor water-blocking tape wrapping layer 15, a metal shielding layer 16, an outer semiconductor water-blocking tape wrapping layer 17, an aluminum-plastic composite tape layer 18 and a phase-separated sheath 19 which are sequentially arranged on the outer periphery of the water-blocking conductor 11.
  • the outer periphery of the water-blocking conductor 11 can be extruded with a conductor shielding layer 12, the outer periphery of the conductor shielding layer 12 can be provided with a cross-linked polyethylene insulation layer 13, the outer periphery of the cross-linked polyethylene insulation layer 13 can be provided with an insulating shielding layer 14, the outer periphery of the insulating shielding layer 14 can be wrapped with an inner layer semiconductor water-blocking tape wrapping layer 15, the outer periphery of the inner layer semiconductor water-blocking tape wrapping layer 15 can be wrapped with a metal shielding layer 16, the outer periphery of the metal shielding layer 16 can be wrapped with an outer layer semiconductor water-blocking tape wrapping layer 17, the outer periphery of the outer layer semiconductor water-blocking tape wrapping layer 17 can be longitudinally wrapped with an aluminum-plastic composite tape layer 18, and finally, the phase-separated sheath 19 can be extruded and adhered to the outer periphery of the aluminum-plastic composite tape layer 18.
  • the three cable cores 10 have the same structure.
  • a total of three water-blocking conductors 11 are provided in the ultra-deepwater submarine cable.
  • the material of the water-blocking conductor 11 is copper or aluminum.
  • the water-blocking conductor 11 When the water-blocking conductor 11 is twisted, it can be filled with a semiconducting water-blocking glue.
  • the water-blocking glue has a very strong water-blocking property and can effectively prevent seawater from penetrating into the conductor, meeting the use requirements of deep water.
  • the outermost layer of the water-blocking conductor 11 can also be wrapped with two layers of semiconducting water-blocking binding tape, so that the core of the water-blocking conductor 11 has longitudinal water-blocking properties.
  • the volume resistivity of the semiconducting water-blocking adhesive used in the water-blocking conductor 11 is ⁇ 1 ⁇ 105 ⁇ cm (23 ⁇ 2°C)
  • the thermal weight loss at 200°C for 2 hours is less than 2%
  • the elongation at break after the water-blocking adhesive is cured is ⁇ 600%, thereby ensuring the adhesion between the water-blocking adhesive and the conductor when the conductor is repeatedly bent.
  • the conductor shielding layer 12 is made of extruded semi-conductive shielding material.
  • the cross-linked polyethylene insulation layer 13 is made of water-tree resistant cross-linked polyethylene material, which is uniformly extruded around the outer periphery of the conductor shielding layer 12 .
  • the cross-linked polyethylene insulation layer 13 may be designed to have the thinnest thickness that meets the field strength requirement.
  • the insulating shielding layer 14 may be made of a semi-conductive shielding material which is directly extruded onto the outer periphery of the cross-linked polyethylene insulating layer 13 .
  • both the inner semiconductive water-tight tape wrapping layer 15 and the outer semiconductive water-tight tape wrapping layer 17 may be made of semiconductive water-tight tape, and both are synchronously wrapped around the outer periphery of the insulating shielding layer 14 with the metal shielding layer 16 .
  • the metal shielding layer 16 can be made of two layers of 0.1 or 0.12 mm thick copper tapes. Moreover, the metal shielding layer 16 can be wrapped with a single layer overlap or a double layer gap overlap. The width can be selected according to the outer diameter of the cable core and the short-circuit current requirements.
  • the aluminum-plastic composite tape layer 18 can be longitudinally wrapped with a layer of 0.245 mm thick aluminum-plastic composite tape, and the overlapping parts of the longitudinal wrapping are welded and sealed.
  • the width is calculated based on the outer diameter of the cable core and the process method.
  • the phase separation sheath 19 is made of semi-conductive polyethylene material, which is directly extruded on the outer periphery of the aluminum-plastic composite tape layer 18 so as to protect the entire cable core 10 and also has a certain water-blocking effect.
  • the cross-linked polyethylene insulation layer 13 is designed with the thinnest thickness that meets the field strength requirements
  • the metal shielding layer 16 is designed with the thinnest metal strip that meets the short-circuit current requirements. This can reduce the outer diameter of the submarine cable, while also reducing the overall deadweight and the tension required for deep water laying, thereby meeting the requirements for deep water use.
  • the outer periphery of the metal shielding layer 16 is wrapped with a layer of aluminum-plastic composite tape, which can play a role in radial water blocking in ultra-deep water environment, and can effectively reduce the possibility of seawater penetrating from the phase separation sheath to the metal shielding layer 16 and causing corrosion of the metal tape.
  • a layer of aluminum-plastic composite tape which can play a role in radial water blocking in ultra-deep water environment, and can effectively reduce the possibility of seawater penetrating from the phase separation sheath to the metal shielding layer 16 and causing corrosion of the metal tape.
  • under high water pressure it can also greatly reduce the pressure on the internal insulation core, effectively preventing the insulation core from being squeezed and damaged.
  • the preformed filling strip 20 can be made of plastics such as polyethylene, polyvinyl chloride, etc. mixed with calcium carbonate for extrusion, wherein the calcium carbonate is used to increase the strength of the preformed filling strip.
  • a cabling tape 40 is provided on the outer peripheries of the cable core 10 and the preformed filling strip 20 .
  • the preformed filling strips 20 are arranged in the cabling gaps of the three cable cores 10, and the cabling wrapping tape 40 can be used to tighten the three cable cores 10 and the preformed filling strips 20 during cabling.
  • the cabling tape 40 may be a layer of 0.3 mm thick rubber-coated cotton tape, which is used to bind the three cable cores 10 and the preformed filling strips 20 tightly, so as to ensure the roundness of the entire structure after cabling.
  • the outer protective structure 30 includes an inner sheath 31, a first armor layer 32, a first armor tape 33, a second armor layer 34, a first armor tape 35, and a second armor tape 36. Second armor band 35 and outer sheath 36.
  • the inner sheath 31 can be extruded around the outer periphery of the cabling tape 40
  • the first armor layer 32 can be arranged on the outer periphery of the inner sheath 31
  • the first armor tape 33 can be arranged on the outer periphery of the first armor layer 32
  • the second armor layer 34 can be arranged on the outer periphery of the first armor tape 33
  • the second armor tape 35 can be arranged on the outer periphery of the second armor layer 34
  • the outer sheath 36 is extruded around the outer periphery of the second armor tape 35.
  • the first armor layer 32 may be a layer of galvanized high-strength steel wire, which is used to withstand the tension during the installation of the submarine cable and also has good corrosion resistance.
  • the second armor layer 34 may also be made of a layer of galvanized high-strength steel wire, which can bear the tension during the installation of the submarine cable together with the first armor layer 32, and also has good corrosion resistance.
  • galvanized steel wire has good corrosion resistance, can effectively prevent seawater corrosion, and meet the requirements for use in deep water.
  • the steel wires in the first armor layer 32 and the steel wires in the second armor layer 34 may have opposite twisting directions, for example, the twisting direction of the steel wires in the first armor layer 32 is to the right and the twisting direction of the steel wires in the second armor layer 34 is to the left, thereby balancing the torque.
  • the outer protection structure adopts an armored structure with multiple layers of high-strength steel wires, which can withstand the huge tension during installation and laying together, and can meet the requirements of deep water use.
  • the even-numbered layers of anisotropically twisted metal armor can meet the torque balance design requirements.
  • the stress and deformation of each layer are consistent, which can improve the tensile strength.
  • the first armor wrapping tape 33 is a 0.3 mm thick rubber-coated cotton tape, which is used to tighten the steel wires in the first armor layer 32 to ensure the roundness of the structure after the first layer of armoring.
  • the second armor tape 35 uses two layers of 0.5 mm thick PBT tape to tighten the steel wires in the second armor layer 34 and all the internal structures to ensure the roundness of the structure after the second layer of armoring.
  • the outer sheath 36 may be made of a high-density polyethylene material, which is directly extruded onto the outer circumference of the second armor tape 35 .
  • the outer sheath 36 is a structure that is in direct contact with the outside world. For the sake of easy identification, a mark may be provided on the outer surface of the outer sheath 36.
  • the outer surface of the outer sheath 36 may be designed with a main body of yellow and a long narrow black strip. The main body of yellow is convenient for finding the position of the submarine cable in deep water, and the long narrow black strip can monitor the torsion angle during the tension of the submarine cable.
  • the flow holes of the outer protection structure 30 include a first through hole 37 provided on the inner jacket 31 and a second through hole 38 provided on the outer jacket 36 .
  • the cavity in the preformed filling strip 20 can be connected to the outside of the outer protective structure 30 by means of the first through hole 37 on the inner jacket 31 and the second through hole 38 on the outer jacket 36, so that the external seawater can enter the cavity in the preformed filling strip 20 through the second through hole 38 and the first through hole 37.
  • the first through holes 37 on the inner jacket 31 can be arranged in sequence along the length direction of the inner jacket 31 at intervals, and the distance between two adjacent first through holes 37 can be determined according to the laying speed of the submarine cable and the water pressure analysis, and the opening size of the first through holes 37 is determined according to the free overflow rate and the water pressure analysis.
  • the second through holes 38 on the outer sheath 36 can be arranged in sequence along the length direction of the outer sheath 36 at intervals, and the distance between two adjacent second through holes 38 can be determined according to the laying speed of the submarine cable and the water pressure analysis.
  • the opening size of the second through hole 38 is determined according to the free overflow rate and water pressure analysis.
  • the thickness of the outer sheath 36 can be determined according to the water pressure requirement to ensure that the outer sheath 36 has better protection effect and mechanical properties such as wear resistance and pressure resistance.
  • the ultra-deepwater submarine cable in this embodiment includes: multiple cable cores, multiple preformed filling strips and an outer protective structure.
  • the outer protective structure is arranged on the periphery of the multiple cable cores and the multiple preformed filling strips.
  • the preformed filling strips are provided with cavities and through holes arranged at intervals along their length direction and radially penetrating into the cavities.
  • the outer protective structure is provided with flow holes.
  • seawater When the ultra-deepwater submarine cable is laid and placed in the deep sea, seawater can enter the gaps between the multiple cable cores and the cavities of the preformed filling strips through the flow holes, so that the air inside the submarine cable can be completely discharged, so that the pressure inside and outside the submarine cable is balanced, and the internal structure of the submarine cable is prevented from being crushed, thereby improving the service life of the submarine cable.
  • the entire ultra-deepwater submarine cable adopts a lightweight structure design, which can reduce the overall outer diameter and deadweight, while also reducing material consumption and costs, thus achieving certain economic benefits.
  • the device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

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Abstract

L'invention concerne un câble sous-marin pour eau ultraprofonde. Le câble sous-marin comprend : une pluralité d'âmes de câble, une pluralité de bandes de remplissage préformées et une structure de protection externe, la pluralité d'âmes de câble étant étroitement torsadées ensemble ; la pluralité de bandes de remplissage préformées étant disposées dans des espaces entre la pluralité d'âmes de câble ; la structure de protection externe est enroulée autour des périphéries de la pluralité d'âmes de câble et de la pluralité de bandes de remplissage préformées. Chaque bande de remplissage préformée est pourvue d'une cavité, qui s'étend dans la direction de la longueur de la bande de remplissage préformée, et des trous traversants, qui sont agencés à des intervalles dans la direction de la longueur de la bande de remplissage préformée et pénètrent dans la cavité dans une direction radiale ; et la structure de protection externe est pourvue de trous d'écoulement. Lorsqu'un câble sous-marin pour eau ultraprofonde est déposé et placé dans une mer profonde, l'eau de mer peut entrer dans des espaces entre une pluralité d'âmes de câble et des cavités de bandes de remplissage préformées au moyen de trous d'écoulement, ce qui permet à l'air à l'intérieur du câble sous-marin d'être complètement évacué, de sorte que la pression à l'intérieur et à l'extérieur du câble sous-marin reste équilibrée, ce qui permet d'éviter qu'une structure interne du câble sous-marin ne soit écrasée, et de prolonger ainsi la durée de vie du câble sous-marin.
PCT/CN2024/114632 2023-10-24 2024-08-26 Câble sous-marin pour eau ultraprofonde Pending WO2025086871A1 (fr)

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CN119132714A (zh) * 2024-09-30 2024-12-13 中天科技海缆股份有限公司 脐带缆及脐带缆打孔方法
CN119673541B (zh) * 2024-12-06 2025-11-04 武汉第二电线电缆有限公司 一种伺服系统用恒温动力电缆及其制备方法
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