CN111883310A - High-voltage dynamic submarine cable - Google Patents

High-voltage dynamic submarine cable Download PDF

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Publication number
CN111883310A
CN111883310A CN202010772564.2A CN202010772564A CN111883310A CN 111883310 A CN111883310 A CN 111883310A CN 202010772564 A CN202010772564 A CN 202010772564A CN 111883310 A CN111883310 A CN 111883310A
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China
Prior art keywords
sheath
layer
water
submarine cable
concave
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Granted
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CN202010772564.2A
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Chinese (zh)
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CN111883310B (en
Inventor
王海涛
潘盼
潘爱荣
祝庆斌
胡明
谢书鸿
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Zhongtian Technology Submarine Cable Co Ltd
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Zhongtian Technology Submarine Cable Co Ltd
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Priority to CN202010772564.2A priority Critical patent/CN111883310B/en
Publication of CN111883310A publication Critical patent/CN111883310A/en
Priority to EP20948042.5A priority patent/EP4163931A4/en
Priority to PCT/CN2020/126858 priority patent/WO2022027849A1/en
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Publication of CN111883310B publication Critical patent/CN111883310B/en
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    • 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
    • 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
    • H01B7/20—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
    • H01B7/18—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
    • 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
    • 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
    • H01B7/2825—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable using a water impermeable sheath
    • 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
    • H01B7/285—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/006—Constructional features relating to the conductors
    • 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
    • H01B13/221—Sheathing; Armouring; Screening; Applying other protective layers filling-up interstices
    • 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
    • H01B7/187—Sheaths comprising extruded non-metallic layers
    • 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
    • H01B7/32—Insulated conductors or cables characterised by their form with arrangements for indicating defects, e.g. breaks or leaks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/005—Power cables including optical transmission elements

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  • Insulated Conductors (AREA)

Abstract

The utility model provides a high pressure developments submarine cable, including electric unit, optical unit, the filler strip, the inner sheath, armor and oversheath, electric unit, optical unit and filler strip transposition each other constitute the submarine cable core, the outside parcel of submarine cable core has inner sheath and oversheath, between sheath and the oversheath including the armor setting, electric unit is including the conductor, the outside parcel of conductor has crowded structural layer altogether in proper order, the buffer layer blocks water, wrinkle copper sheathing and phase splitting sheath, the concave-convex structure of a plurality of rings types or screw thread type has been rolled to the lateral surface of wrinkle copper sheathing along its axial, the buffer layer blocks water and phase splitting sheath all with the concave-convex structure contact and the packing on the wrinkle copper sheathing. The invention provides an excellent radial water-blocking effect, ensures the normal use of the ultra-clean high-voltage insulating material in the deep and open sea, high salinity and high water pressure environment, provides guarantee for the reliable operation of the floating type booster station of the future floating wind field and ensures the use function of the high-voltage dynamic submarine cable.

Description

High-voltage dynamic submarine cable
Technical Field
The invention belongs to the technical field of submarine cables, and particularly relates to a high-voltage dynamic submarine cable.
Background
As wind turbines gradually move to deep sea, floating wind power has become a development trend of offshore wind power. Foreign wind power developers and related organizations such as Scotland, Japan and France have already put into operation a few experimental prototypes since 2009, and in recent years, wind power operators and submarine cable manufacturing enterprises in China also develop basic research on dynamic submarine cables successively.
The floating wind field can remotely transmit electric energy and must adopt a floating booster station. The ac voltage delivered by the booster station is often greater than 110kV, and 220kV is preferred. In order to meet the action of long-term severe dynamic fatigue load, the dynamic submarine cable adopts a wet structure, namely the water tree resistant insulating material can run in a water vapor environment for a long time. At present, the water tree resistant insulation material is generally maintained below 72kV, and when the dynamic submarine cable adopts a voltage level of 110kV or above, the insulation material becomes a design bottleneck. According to the published data, the high-voltage dynamic submarine cable still belongs to the technical blank.
Static submarine cables and land cables are made of ultra-clean insulating materials, lead sleeves and aluminum sleeves are adopted for radial water prevention, and dry-type design is formed, but the metal structures have poor fatigue resistance and poor conductivity, and cannot meet the design requirements of dynamic submarine cables
In the design of the high-voltage land cable, the insulated wire core usually adopts the technologies of extruding a lead sheath, longitudinally wrapping and welding an aluminum sheath and the like, and the highest voltage level can reach 500 kV. However, these metal sheath materials are thick and heavy, not suitable for deep water environment, and have poor fatigue resistance. In addition, after the high-pressure dynamic submarine cable is cabled, the outer diameter of the high-pressure dynamic submarine cable is often more than 200mm, and great challenges are brought to an armor technology and the extrusion capacity of an outer sheath.
In conclusion, it is important to develop a high-voltage dynamic cable which can be used in deep open sea, high salinity and high water pressure environments.
Disclosure of Invention
In view of the above, the present invention aims to provide a high-pressure dynamic sea cable which can be used in deep open sea, high salinity and high water pressure environments.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a high pressure developments submarine cable, including electric unit, optical unit, filler strip, inner sheath, armor and oversheath, electric unit optical unit with the filler strip transposition each other constitutes the submarine cable core, the outside parcel of submarine cable core have the inner sheath with the oversheath, the armor sets up the inner sheath with between the oversheath, its characterized in that: the electric unit comprises a conductor, wherein the outer part of the conductor is sequentially wrapped with a co-extrusion structure layer, a water-blocking buffer layer, a corrugated copper sleeve and a phase-splitting sheath, the outer side surface of the corrugated copper sleeve is rolled with a plurality of annular or threaded concave-convex structures along the axial direction of the corrugated copper sleeve, and the water-blocking buffer layer and the phase-splitting sheath are in contact with and filled in the concave-convex structures on the corrugated copper sleeve.
Preferably, the corrugated copper sleeve has a thickness of 0.6-0.8 mm, an inner diameter of 70-150 mm, a pitch of 8-18 mm, and a depth of the concave-convex structure of 3-8 mm, and when the concave-convex structure is a screw thread type, a helix angle of the concave-convex structure is 5-60 °.
Preferably, the corrugated copper sleeve needs to be annealed, and the material of the corrugated copper sleeve includes but is not limited to one of copper and copper alloy.
Preferably, the co-extrusion structure layer consists of a conductor shielding layer, an insulating layer and an insulating shielding layer, and 2 or 4 layers of semi-conductive water-blocking tapes or semi-conductive buffer water-blocking tapes are wrapped outside the co-extrusion structure layer to form the water-blocking buffer layer.
Preferably, copper wires are further arranged between the water blocking buffer layers, the copper wires are circumferentially and sparsely wound between the adjacent semi-conductive water blocking tapes or the adjacent semi-conductive buffer water blocking tapes, and 4-6 copper wires are arranged.
Preferably, the phase separation sheath is an extrusion type phase separation sheath, the thickness of the extrusion type phase separation sheath is 3-8 mm, and the material of the extrusion type phase separation sheath is a semiconductive material and comprises but is not limited to one of polyethylene and polyurethane.
Preferably, the filler strips comprise steel strand filler strips and polyethylene filler strips, the steel strand filler strips comprise a plurality of steel strands and polyethylene sheaths, the steel strands are twisted into a strip shape, the polyethylene sheaths wrap the steel strands, and gaps among the optical units, the electrical units and the inner sheaths are filled with the steel strand filler strips and the polyethylene filler strips.
Preferably, the armor layer is formed by winding a plurality of flat steel wires in a surface contact mode, the number of the armor layer is even, the number of the armor layer is at least two, and one of asphalt, factice, lubricant and graphene is coated outside each armor layer.
Compared with the prior art, the invention adopts the longitudinal corrugated copper bush as the metal shielding layer, has the functions of bearing short-circuit current and radially blocking water, and meets the dynamic use requirement; water resistance can be realized by arranging a plurality of water-resistant buffer layers; in addition, the copper wire is circumferentially and sparsely wound between the two water-blocking buffer layers, so that short-circuit current can be shared; the arrangement of the extrusion type split-phase sheath can fill the wrinkle concave gaps of the wrinkle copper sheath, realize longitudinal water resistance and improve strength; through the design of even number layer flat steel wire armor, can reduce the cable external diameter behind the high pressure developments submarine cable stranding greatly, can also promote submarine cable's bending strength and axial tensile strength, be convenient for transportation and construction. The invention provides an excellent radial water-blocking effect, ensures the normal use of the ultra-clean high-voltage insulating material in the deep and open sea, high salinity and high water pressure environment, provides guarantee for the reliable operation of the floating type booster station of the future floating wind field and ensures the use function of the high-voltage dynamic submarine cable.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of the present invention;
FIG. 2 is an axial cross-sectional view of the corrugated copper sleeve of the present invention;
FIG. 3 is an axial cross-sectional view of the corrugated copper sleeve and the split-phase sheath of the present invention.
Reference numerals and component parts description referred to in the drawings:
1. a conductor; 2. co-extruding a structural layer; 3. a water-blocking buffer layer; 4. a corrugated copper sleeve; 5. a split-phase sheath; 6. steel strand filler strips; 7. a polyethylene filler strip; 8. a light unit; 9. an inner sheath; 10. an armor layer; 11. an outer sheath.
Detailed Description
The technical solution of the present invention will be clearly and completely described by the following detailed description. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the high-voltage dynamic submarine cable comprises an electric unit, an optical unit 8, a filler strip, an inner sheath 9, an armor layer 10 and an outer sheath 11, wherein the electric unit, the optical unit 8 and the filler strip are twisted with each other to form a submarine cable core, the inner sheath 9 and the outer sheath 11 wrap the outer portion of the submarine cable core, and the armor layer 10 is arranged between the inner sheath 9 and the outer sheath 11. In this embodiment, the electrical unit contains three at least, and one is no less than to light unit 8's quantity for transmit optical signal, and the accessible monitoring temperature, vibration etc. signal realize the dynamic detection to the submarine cable, in case the submarine cable takes place damage or trouble, can report to the police fast and fix a position.
The electric unit comprises a cross-sectional area of not less than 500mm2The conductor 1 is characterized in that a co-extrusion structure layer 2, a water-blocking buffer layer 3, a corrugated copper sleeve 4 and a split-phase sheath 5 are sequentially wrapped outside the conductor 1. The co-extrusion structural layer 2 is composed of a conductor shielding layer, an insulating layer and an insulating shielding layer, 2 or 4 layers of semi-conductive water blocking tapes or semi-conductive buffering water blocking tapes are wound outside the co-extrusion structural layer 2 to form the water blocking buffer layer 3, the corrugated copper sleeve 4 is sleeved outside the water blocking buffer layer 3, and the corrugated copper sleeve 4 can extrude the adjacent water blocking buffer layer 3 in the rolling process. In this embodiment, the buffer layer 3 that blocks water includes the water-blocking layer and the buffer layer that set gradually, and 4 sticiss the water-blocking layer on the one hand, play vertical water-blocking effect, and on the other hand the buffer layer is alleviated the indentation of concave-convex structure on 4 to the insulating layer of wrinkle copper sheathing, guarantee electrical operation safety.
In order to share the short-circuit current and ensure that the corrugated copper sleeve 4 cannot overload the short-circuit current, copper wires (not shown in the figure) are further arranged between the water blocking buffer layers 3, and specifically, 4-6 copper wires with the diameter of 0.8mm are circumferentially and sparsely wound between the adjacent semi-conductive water blocking tapes or the semi-conductive buffer water blocking tapes.
The outer side surface of the corrugated copper sleeve 4 is rolled with a plurality of annular or threaded concave-convex structures along the axial direction, and the water-blocking buffer layer 3 and the split-phase sheath 5 are both contacted and filled with the concave-convex structures on the corrugated copper sleeve 4. Specifically, the thickness of the corrugated copper sleeve 4 is 0.6-0.8 mm, the inner diameter is 70-150 mm, the pitch is 8-18 mm, and the depth of the concave-convex structure is 3-8 mm.
Referring to fig. 2 to 3, a plurality of annular concave-convex structures are rolled on the outer side surface of the corrugated copper sleeve 4 along the axial direction, the inner diameter D1 of the corrugated copper sleeve 4 is 70 to 150mm, the pitch is 8 to 18mm, and the depth of the concave-convex structure, namely the depth of the rolling is 3 to 8 mm. The submarine cable provided by the invention can meet the requirements of cable cores with different cross-sectional areas, overcomes the problems of argon arc welding and embossing under the conditions of large size, thin wall thickness and continuous length, and avoids the defects of broken welding, missing welding and the like. Is beneficial to improving the fatigue strength of the corrugated copper sleeve 4 and prolonging the fatigue life, and can also play the roles of metal shielding and radial water resistance.
Several specific examples are given below:
the inner diameter D1 of the corrugated copper sleeve 4 is 70mm, the pitch is 8-10 mm, and the embossing depth is 3-4 mm;
the inner diameter D1 of the corrugated copper sleeve 4 is 90mm, the pitch is 10-12 mm, and the embossing depth is 4-5 mm;
the inner diameter D1 of the corrugated copper sleeve 4 is 110mm, the pitch is 12-14 mm, and the embossing depth is 5-6 mm;
the inner diameter D1 of the corrugated copper sleeve 4 is 130mm, the pitch is 14-16 mm, and the embossing depth is 6-7 mm;
the inner diameter D1 of the corrugated copper sleeve 4 is 150mm, the pitch is 16-18 mm, and the embossing depth is 7-8 mm.
When the concave-convex structure is a screw thread type, the helix angle of the concave-convex structure is 5-60 degrees.
The material of the corrugated copper sheath 4 includes, but is not limited to, one of copper and copper alloy. The copper alloy material can effectively improve the welding performance during argon arc welding, and obviously improve the fatigue performance and the fatigue life of the corrugated copper sleeve 4. In order to reduce or eliminate the strain hardening and improve the fatigue resistance of the material, the corrugated copper sleeve 4 needs to be annealed, and the corrugated copper sleeve 4 has the strain hardening phenomenon after being rolled, namely the work hardening phenomenon, so that the corrugated copper sleeve 4 needs to be annealed by adopting a proper annealing mode.
In order to block the water vapor from entering, increase the strength of the cable core and improve the fatigue resistance, the split-phase sheath 5 adopts an extrusion process so as to fully extrude the concave-convex structure gap on the outer wall of the corrugated copper sleeve 4. The thickness of the phase separation sheath 5 is 3-8 mm, the material is a semi-conductive material and comprises but is not limited to one of polyethylene and polyurethane, and the material of the phase separation sheath 5 can meet the mechanical protection and grounding effect of the corrugated copper sleeve 4.
In order to increase the weight of the cable and improve the mechanical strength of the cable, the gap is filled with a filling strip during cabling. The filler strip comprises a steel strand filler strip 6 and a polyethylene filler strip 7, wherein the steel strand filler strip 6 comprises a plurality of steel strands and a polyethylene sheath, the steel strands are twisted into a strip shape, the polyethylene sheath wraps the steel strands, and a plurality of steel strand filler strips and the polyethylene filler strip are filled in gaps among the optical unit 8, the electrical unit and the inner sheath 9.
After electric unit, optical unit 8 and filler strip transposition stranding cable, developments submarine cable external diameter is great, adopts even number layer and is two-layer armor 10 design at least, and armor 10 is formed around the package with the form of face contact by many flat steel wires, and many flat steel wires adopt the form of face contact, and the friction is more even, improves the wearability. In order to effectively prevent and reduce abrasion under dynamic environmental load and meet the long-term service life requirement under the action of large water depth, large weight and severe environmental load, one of asphalt, factice, lubricant and graphene is smeared outside each armor layer 10. By adopting the armor layer 10, the bending rigidity of the submarine cable can be improved to 5.0 x 10 while the overall outer diameter of the dynamic submarine cable is reduced5N·mm2The number of steel wires can be effectively reduced, the axial tensile strength is improved to 1500MN, and the reduction of the outer diameter of the submarine cable is also beneficial to transportation and construction.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. The utility model provides a high pressure developments submarine cable, including electric unit, optical unit, filler strip, inner sheath, armor and oversheath, electric unit optical unit with the filler strip transposition each other constitutes the submarine cable core, the outside parcel of submarine cable core have the inner sheath with the oversheath, the armor sets up the inner sheath with between the oversheath, its characterized in that: the electric unit comprises a conductor, wherein the outer part of the conductor is sequentially wrapped with a co-extrusion structure layer, a water-blocking buffer layer, a corrugated copper sleeve and a phase-splitting sheath, the outer side surface of the corrugated copper sleeve is rolled with a plurality of annular or threaded concave-convex structures along the axial direction of the corrugated copper sleeve, and the water-blocking buffer layer and the phase-splitting sheath are in contact with and filled in the concave-convex structures on the corrugated copper sleeve.
2. A high pressure dynamic sea cable according to claim 1 wherein: the corrugated copper sleeve is 0.6-0.8 mm in thickness, 70-150 mm in inner diameter and 8-18 mm in pitch, the depth of the concave-convex structure is 3-8 mm, and when the concave-convex structure is a threaded structure, the helix angle of the concave-convex structure is 5-60 degrees.
3. A high pressure dynamic sea cable according to claim 1 wherein: the corrugated copper sleeve needs to be annealed, and the material of the corrugated copper sleeve includes but is not limited to one of copper and copper alloy.
4. A high pressure dynamic sea cable according to claim 1 wherein: the co-extrusion structural layer is composed of a conductor shielding layer, an insulating layer and an insulating shielding layer, and 2 or 4 layers of semi-conductive water-blocking tapes or semi-conductive buffer water-blocking tapes are wrapped outside the co-extrusion structural layer to form the water-blocking buffer layer.
5. A high pressure dynamic sea cable according to claim 4 wherein: copper wires are further arranged between the water blocking buffer layers, the copper wires are circumferentially and sparsely wound between the adjacent semi-conductive water blocking tapes or the semi-conductive buffer water blocking tapes, and 4-6 copper wires are arranged.
6. A high pressure dynamic sea cable according to claim 1 wherein: the split-phase sheath is an extrusion type split-phase sheath, the thickness of the split-phase sheath is 3-8 mm, and the extrusion type split-phase sheath is made of a semiconductive material and comprises but is not limited to one of polyethylene and polyurethane.
7. A high pressure dynamic sea cable according to claim 1 wherein: the packing strip comprises a steel strand packing strip and a polyethylene packing strip, the steel strand packing strip comprises a plurality of steel strands and a polyethylene sheath, the steel strands are twisted into a strip shape, the polyethylene sheath wraps the steel strands, and gaps among the optical unit, the electric unit and the inner sheath are filled with the steel strand packing strip and the polyethylene packing strip.
8. High-pressure dynamic sea cable according to claim 1, characterized in that: the armor layer is formed by winding a plurality of flat steel wires in a surface contact mode, the number of layers of the armor layer is even and is at least two, and one of asphalt, factice, lubricant and graphene is coated outside each layer of the armor layer.
CN202010772564.2A 2020-08-04 2020-08-04 High-voltage dynamic submarine cable Active CN111883310B (en)

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Application Number Priority Date Filing Date Title
CN202010772564.2A CN111883310B (en) 2020-08-04 2020-08-04 High-voltage dynamic submarine cable
EP20948042.5A EP4163931A4 (en) 2020-08-04 2020-11-05 High-voltage dynamic submarine cable
PCT/CN2020/126858 WO2022027849A1 (en) 2020-08-04 2020-11-05 High-voltage dynamic submarine cable

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CN113031179A (en) * 2021-03-22 2021-06-25 杭州富通通信技术股份有限公司 Built-in water-blocking joint and semi-dry optical cable
CN114005583A (en) * 2021-11-01 2022-02-01 中天科技海缆股份有限公司 Submarine cable
WO2022027849A1 (en) * 2020-08-04 2022-02-10 中天科技海缆股份有限公司 High-voltage dynamic submarine cable
WO2024001305A1 (en) * 2022-06-30 2024-01-04 中天科技海缆股份有限公司 Dynamic submarine cable and forming method for dynamic submarine cable

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CN114512270B (en) * 2022-03-08 2023-06-13 安徽渡江电缆集团有限公司 Power cable of layered insulation stranded conductor
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CN117153495B (en) * 2023-10-20 2024-02-09 江苏亨通高压海缆有限公司 Submarine cable water-blocking adhesive coating equipment

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