CN113990558A - Dry-type insulation submarine optical cable - Google Patents
Dry-type insulation submarine optical cable Download PDFInfo
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- CN113990558A CN113990558A CN202111252775.4A CN202111252775A CN113990558A CN 113990558 A CN113990558 A CN 113990558A CN 202111252775 A CN202111252775 A CN 202111252775A CN 113990558 A CN113990558 A CN 113990558A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/14—Submarine cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/22—Cables including at least one electrical conductor together with optical fibres
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0009—Details relating to the conductive cores
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0045—Cable-harnesses
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
- H01B7/0275—Disposition of insulation comprising one or more extruded layers of insulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—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
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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
- H01B9/005—Power cables including optical transmission elements
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Abstract
The invention provides a dry-type insulated submarine optical cable which comprises a stainless steel optical fiber unit positioned in the center, and a conductive unit, a first semi-conductive water-blocking tape, a conductor shielding layer, an insulating shielding layer, a second semi-conductive water-blocking tape, a lead sleeve, an outer protective layer, an armor layer and an outer coating layer which are sequentially arranged outside the stainless steel optical fiber unit from inside to outside; the conductive unit is formed by twisting copper wires on the outer side of the stainless steel optical fiber. Compared with the traditional submarine optical cable, the dry-type insulated submarine optical cable isolates the insulating layer from the armor layer, and the lead sleeve and the outer protective layer are added to protect the insulating layer, so that the insulating layer is not in direct contact with water during working, the problem of reduction of insulating property caused by seawater infiltration can be effectively solved, the service life of the submarine optical cable is prolonged, and the conductive unit is formed by twisting copper wires, so that the direct-current resistance of a smaller conductor can be realized, a longer transmission distance can be realized, and the dry-type insulated submarine optical cable is used for a higher voltage level system.
Description
Technical Field
The invention relates to the technical field of submarine optical cables, in particular to a dry-type insulated submarine optical cable capable of being used for a high-voltage-class system.
Background
The submarine optical cable is a framework in the global Internet at present, is mainly applied to communication transmission among continents, between islands and continents and between islands and islands, generally adopts a relay structure for realizing long-distance communication, needs to be electrified and operated, and has the basic principle that standard electric power is converted into electric power with constant current and voltage of thousands of volts or even tens of thousands of volts by a control system based on a microprocessor to supply power to submarine equipment of the submarine optical cable system. The low-resistance conductive unit in the power supply line is beneficial to the submarine optical cable to have a longer transmission distance and a grade system suitable for higher voltage.
According to statistics, more than 90% of the faults of the existing relay submarine optical cable are caused by the insulating layer.
The typical submarine optical cable with the relay comprises a stainless steel optical fiber unit, an inner armor steel wire, a copper pipe, an insulating layer, a steel wire armor layer and an outer tegument layer, wherein the stainless steel optical fiber unit is positioned in the center of the optical cable, and the inner armor steel wire, the copper pipe, the insulating layer, the steel wire armor layer and the outer tegument layer are sequentially arranged on the outer side of the stainless steel optical fiber unit from inside to outside. Wherein, the insulating layer is direct to contact with armor steel wire and sea water, and the armor steel wire can extrude the insulating layer in processes such as production, transportation, laying, operation, causes insulating surface steel wire to sink into, and the effective thickness attenuation of insulation to reduce insulating properties.
In addition, when the submarine optical cable is laid in a submarine environment for a long time, seawater can also permeate into the insulating layer due to the relation of water pressure, so that the insulating property is reduced, and the service life is shortened. Taking the insulating layer as low-density polyethylene as an example, the insulating layer is immersed in 3.5 percent of artificial seawater under the water pressure of 30MPa, the water absorption capacity is about 1.582 per thousand after 24 hours, and the water absorption capacity is about 2.074 per thousand after 48 hours, and the water absorption capacity still tends to increase.
Asphalt needs to be filled on the surface of the insulating layer and steel wire gaps in the armoring steel wire armoring process, and the asphalt needs to be filled at a high temperature of over 160 ℃, so that the insulating layer is easily scalded; conventional sea optical cable insulation extrusion molding production line is the level and arranges, because the material dead weight influence, can't realize that the large thickness is insulating extrudes, and through experimental verification, obvious ellipse phenomenon will appear in insulating layer thickness exceedes 4.5mm, and thickness is thicker eccentric more difficult assurance.
Disclosure of Invention
Aiming at the problems of the existing submarine optical cable, the invention aims to provide a dry-type insulated submarine optical cable which can prevent the influence of armored steel wire extrusion and seawater infiltration on an insulating layer and effectively ensure the insulating property, thereby prolonging the service life of the cable, being used for a higher-voltage-level system and having longer transmission distance.
Embodiments of the invention may be implemented as follows:
a dry-type insulated submarine optical cable comprises a stainless steel optical fiber unit positioned in the center, and a conductive unit, a first semi-conductive water-blocking tape, a conductor shielding layer, an insulating shielding layer, a second semi-conductive water-blocking tape, a lead sleeve, an outer protective layer, an armor layer and an outer coating layer which are sequentially arranged on the outer side of the stainless steel optical fiber unit from inside to outside; the conductive unit is formed by twisting copper wires on the outer side of the stainless steel optical fiber.
In a preferred scheme, the conductor shielding layer, the insulating layer and the insulating shielding layer are of a three-layer co-extrusion structure and are obtained by vertically extruding through a catenary production line.
In a preferable scheme, the conductive unit is formed by reversely twisting two layers of copper wires, the copper wires in the conductive unit are round copper wires or special-shaped copper wires, and the direct current resistance of the conductive unit at 20 ℃ is less than or equal to 0.5 omega/km.
Optionally, a steel wire is arranged between the copper wires of the conductive unit to improve the mechanical strength of the cable core.
Specifically, the stainless steel optical fiber unit comprises a plurality of optical fibers, a stainless steel pipe sleeved with the optical fibers, and fiber paste filled in the stainless steel pipe, wherein the optical fibers are single-mode optical fibers, the fiber paste is made of a non-hydrogen-evolution material, the stainless steel pipe is formed by longitudinally wrapping and welding 316L steel bands, and the thickness of each steel band is not less than 0.18 mm.
Specifically, the first semi-conductive water-blocking tape is lapped and wrapped on the outer side of the conductive unit, the wrapping direction of the first semi-conductive water-blocking tape is opposite to the twisting direction of the outermost layer of copper wires in the conductive unit, and the lapping rate of the first semi-conductive water-blocking tape is 30% -50%; and semi-conductive water-resistant glue is filled in gaps among the stainless steel optical fiber unit, the conductive unit and the first semi-conductive water-blocking tape.
Specifically, the conductor shielding layer and the insulation shielding layer are made of semiconductive polyethylene materials, and the insulation layer is made of linear low-density polyethylene materials or crosslinked polyethylene materials.
Specifically, the second semi-conductive water-blocking tape is lapped and wrapped on the outer side of the insulating shielding layer, the wrapping direction is right, and the lapping rate is 15% -25%; the lead sleeve is formed on the outer sides of the second semiconductive water-blocking tape and the insulating shielding layer in an extrusion molding mode, and the thickness of the lead sleeve is more than or equal to 1.5 mm.
Specifically, the outer jacket is formed outside the lead sleeve in an extrusion molding mode, and the outer jacket is made of high-density polyethylene.
Specifically, the armor layer is formed by spirally winding one or two layers of steel wires, and the steel wires are galvanized steel wires or zinc-aluminum-magnesium alloy coatings; when the armor layer is spirally wound by a layer of steel wires, the armor direction of the steel wires is the left direction, and the pitch-diameter ratio is 16-20 times; when the armor layer is spirally wound by two layers of steel wires, the armor directions of the two layers of steel wires are the same direction or opposite directions, the armor direction of the outer layer of steel wires is the left direction, and the pitch diameter ratio of the inner layer of steel wires is 2 larger than that of the outer layer of steel wires.
Specifically, the outer coating layer is formed by extrusion molding of high-density polyethylene or by reversely winding two layers of polypropylene ropes.
The invention has the beneficial effects that:
(1) compared with the traditional submarine optical cable, the dry-type insulated submarine optical cable isolates the insulating layer from the armor layer, and the lead sleeve and the outer protective layer are added to protect the insulating layer;
(2) the conductive unit is formed by twisting copper wires, and compared with the traditional submarine optical cable which adopts copper wires as the conductive unit, the conductive unit has smaller direct-current resistance of a conductor, can realize longer transmission distance and is used for a system with higher voltage level;
(3) the conductor shielding layer, the insulating layer and the insulating shielding layer are of a three-layer co-extrusion structure, and are vertically extruded by a catenary production line, so that the large-thickness insulating layer can be extruded, and the high-voltage-level system can be used for a higher-voltage-level system.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural view of a dry insulation submarine optical cable according to the present invention;
fig. 2 is an enlarged schematic structural view of the stainless steel optical fiber unit of fig. 1.
Icon: 1-stainless steel optical fiber unit, 2-conductive unit, 3-first semiconductive water-blocking tape, 4-conductor shielding layer, 5-insulating layer, 6-insulating shielding layer, 7-second semiconductive water-blocking tape, 8-lead sleeve, 9-outer protective layer, 10-armor layer, 11-outer coating layer, 101-optical fiber, 102-fiber paste and 103-stainless steel tube.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Referring to fig. 1, an embodiment of the present invention provides a dry-type insulated submarine optical cable, which includes a stainless steel optical fiber unit 1 located at the center, and a conductive unit 2, a first semi-conductive water-blocking tape 3, a conductor shielding layer 4, an insulating layer 5, an insulating shielding layer 6, a second semi-conductive water-blocking tape 7, a lead sheath 8, an outer sheath 9, an armor layer 10, and an outer coating layer 11, which are sequentially disposed from inside to outside on the outer side of the stainless steel optical fiber unit 1.
As shown in fig. 2, the stainless steel optical fiber unit 1 is composed of optical fibers 101, fiber paste 102, and a stainless steel tube 103, wherein the stainless steel tube is sleeved with a plurality of optical fibers 101, the fiber paste 102 is filled in the stainless steel tube 103, the optical fibers 101 are single-mode optical fibers, the fiber paste 12 is made of a non-hydrogen-evolution material, the filling degree is not less than 90%, the stainless steel tube 103 is formed by longitudinally wrapping and welding 316L steel bands, and the thickness of the steel bands is preferably not less than 0.18 mm.
The conductive unit 2 is formed by reversely twisting two layers of round copper wires or special-shaped copper wires, the direct current resistance of a conductor of the conductive unit at 20 ℃ can be less than 0.5 omega/km, and the direct current resistance of the conductor of a copper tube adopted by a conventional relay submarine optical cable at 20 ℃ is about 1 omega/km. According to the requirement, part of the copper wires in the conductive unit 2 can be replaced by steel wires with the same size and specification, so that the mechanical strength of the cable core is improved, and the resistance of the whole conductive unit 2 can be controllably adjusted.
The first semi-conductive water-blocking tape 3 is lapped and wrapped on the outer side of the conductor 2, the lapping direction is opposite to the twisting direction of the outer copper wire in the conductive unit 2, and the lapping rate is preferably controlled to be 30% -50%. Gaps among the stainless steel optical fiber unit 1, the conductive unit 2 and the first semi-conductive water-blocking tape 3 are filled with semi-conductive resistance glue, the conductivity of the conductor can be ensured by adopting semi-conductive materials, and the whole cable core can be filled with the semi-conductive resistance glue, so that the structure is tighter and the water tightness is better; in another embodiment, the semiconductive water-blocking adhesive fully filled in the twisted gaps of the conductive unit 2 can be replaced by a structure in which each layer of copper wire is horizontally pulled and longitudinally wrapped by one layer of semiconductive water-blocking tape.
The conductor shielding layer 4, the insulating layer 5 and the insulating shielding layer 6 are simultaneously extruded by adopting a three-layer co-extrusion mode, the insulating layer 5 can be better protected by adopting a three-layer co-extrusion structure, the conductor shielding layer 4, the insulating layer 5 and the insulating shielding layer 6 are produced by a catenary production line, the insulating layer 5 is vertical to a horizontal plane during extrusion, and the eccentricity can be controlled to be less than 8%. The conductor shielding layer 4 and the insulation shielding layer 6 are made of semiconductive polyethylene materials generally, and the insulation layer 5 is made of linear low-density polyethylene materials or crosslinked polyethylene materials with better insulation performance generally; the insulating layer 5 can be extruded to a thickness of 5.0mm or more and can be used in a 35kV voltage class system.
The 7 overlap joints of second semiconduction waterproofing area are around the package in the insulation core outside, should select the right side around the package direction, and the overlap joint rate should be controlled at 15% ~ 25%, and its effect has not only improved the water blocking performance between insulation core and the lead cover 8, still provides one deck buffering and protective layer for insulation core, prevents that high temperature scald insulation shielding layer 6 when lead cover 8 extrudes.
The lead sleeve 8 is formed outside the insulated wire core and the second semi-conductive water blocking tape 7 through extrusion molding, the longitudinal and radial water blocking capacity of the optical cable is improved, and the thickness of the lead sleeve is not less than 1.5 mm.
The outer jacket 9 is formed outside the lead sleeve 8 in an extrusion molding mode, and the material of the outer jacket 9 generally adopts high-density polyethylene and is used for improving the wear resistance of the lead sleeve 8.
The armor layer 10 is formed by spirally winding one or two layers of corrosion-resistant galvanized steel wires, zinc-aluminum-magnesium alloy coating steel wires or equivalent materials; when the armor layer 10 is spirally wound by a layer of steel wires, the direction of the layer of steel wires is the left direction, and the pitch diameter ratio is 16-20 times; when the armor layer 10 adopts two-layer steel wire spiral winding, this two-layer steel wire armor direction is syntropy or reverse, and outer steel wire armor direction is the left hand, and the inlayer pitch diameter ratio is greater than outer pitch diameter ratio 2, and the effect of armor layer 10 is for providing mechanical protection for whole optical cable.
The outer tegument layer 11 is selected according to different use environments, can adopt the same material and technology preparation with the outer jacket layer 9, if adopt high density polyethylene extrusion molding to form, its thickness should be no less than 3mm, also can adopt two-layer polypropylene (PP) rope reverse winding to form, the outer steel wire winding direction in the inner PP rope direction and armor 10 is opposite, and the pitch is watered in the steel wire in the armor 10 and the gap of polypropylene rope, and its effect is for the protection steel wire cladding in order to improve the life of optical cable.
The following calculation is carried out according to the conditions that the direct current resistance of a conductor of the conductive unit 2 at 20 ℃ is 0.5 omega/km, a copper pipe adopted by a conventional trunk submarine optical cable is 1 omega/km, a 10kV system is taken as an example, the working current I is 10A, and the maximum allowable voltage drop ratio is 5 percent:
maximum allowable voltage drop Δ U is 10000 × 5% ═ 500V, I ═ 10A;
Δ U ═ ir ═ R20 × L, where R20 is the conductor dc resistance at 20 ℃ and L is the transmission distance;
then, the maximum transmission length L1 of the conventional optical cable under the sea is 500/1/10-50 km; the maximum transmission length L2 of the dry type insulation submarine optical cable is 500/0.5/10 to 100 km.
As can be seen from the above calculation process, the dry type insulated submarine optical cable according to the present invention has a longer transmission distance than the conventional repeatered submarine optical cable.
Compared with the traditional submarine optical cable, the dry-type insulated submarine optical cable isolates the insulating layer 5 from the armor layer 10, the lead sleeve 8 and the outer protective layer 9 are additionally arranged between the insulating layer 5 and the armor layer 10 to protect the insulating layer 5, and the insulating layer 5 is not in direct contact with water during working, so that the problem of reduction of insulating property caused by seawater infiltration can be effectively solved, and the service life of the submarine optical cable is prolonged; the conductive unit 2 is formed by twisting copper wires, and compared with the traditional submarine optical cable which adopts copper tubes as conductive units, the conductive unit has smaller direct current resistance of conductors and can realize longer transmission distance, the conductor shielding layer 4, the insulating layer 5 and the insulating shielding layer 6 are of a three-layer co-extrusion structure, and the suspension chain production line is adopted to vertically extrude, so that the large-thickness insulating layer can be extruded, and the conductive unit can be used for a higher voltage level system.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A dry-type insulated submarine optical cable is characterized by comprising a stainless steel optical fiber unit positioned in the center, and a conductive unit, a first semi-conductive water-blocking tape, a conductor shielding layer, an insulating shielding layer, a second semi-conductive water-blocking tape, a lead sleeve, an outer protective layer, an armor layer and an outer coating layer which are sequentially arranged outside the stainless steel optical fiber unit from inside to outside; the conductive unit is formed by twisting copper wires on the outer side of the stainless steel optical fiber.
2. A dry type insulated submarine optical cable according to claim 1, wherein the conductor shield, the insulation layer, and the insulation shield are of a three-layer co-extrusion structure and are obtained by vertical extrusion using a catenary production line.
3. A dry type insulated submarine optical cable according to claim 1, wherein said conductive unit is formed by reversely twisting two layers of copper wires, the copper wires in said conductive unit are round copper wires or shaped copper wires, and the dc resistance of said conductive unit at 20 ℃ is not more than 0.5 Ω/km.
4. A dry insulated submarine optical cable according to claim 1, wherein steel wires are provided between the copper wires of the conductive elements.
5. The dry insulation submarine optical cable according to claim 1, wherein the stainless steel optical fiber unit comprises a plurality of optical fibers, a stainless steel tube for sheathing the plurality of optical fibers, and a fiber paste filled in the stainless steel tube, wherein the optical fibers are single-mode optical fibers, the fiber paste is made of a non-hydrogen-evolution material, and the stainless steel tube is formed by longitudinally wrapping and welding 316L steel strips.
6. A dry type insulated submarine optical cable according to claim 1, wherein the first semi-conductive water-blocking tape is lapped and wrapped outside the conductive unit, the lapping direction of the first semi-conductive water-blocking tape is opposite to the twisting direction of the outermost copper wire layer in the conductive unit, and the lapping rate of the first semi-conductive water-blocking tape is 30% to 50%; and semi-conductive water-resistant glue is filled in gaps among the stainless steel optical fiber unit, the conductive unit and the first semi-conductive water-blocking tape.
7. A dry-type insulated submarine optical cable according to claim 1, wherein the conductor shield and the insulation shield are made of semi-conductive polyethylene, and the insulation layer is made of linear low density polyethylene or cross-linked polyethylene.
8. A dry type insulated submarine optical cable according to claim 1, wherein the second semi-conductive water-blocking tape is lapped and wrapped outside the insulation shielding layer, the lapping direction is right direction, and the lapping rate is 15% to 25%; the lead sleeve is formed on the outer sides of the second semiconductive water-blocking tape and the insulating shielding layer in an extrusion molding mode, and the thickness of the lead sleeve is more than or equal to 1.5 mm.
9. The dry-type insulated submarine optical cable according to claim 1, wherein said outer sheath is formed outside said lead sheath by extrusion molding, said outer sheath being made of high-density polyethylene;
the outer coating layer is formed by extrusion molding of high-density polyethylene or by reversely winding two layers of polypropylene ropes.
10. A dry type insulated submarine optical cable according to claim 1, wherein said armor layer is formed by spirally winding one or two layers of steel wires, said steel wires being galvanized steel wires or a zinc-aluminum-magnesium alloy coating; when the armor layer is spirally wound by a layer of steel wires, the armor direction of the steel wires is the left direction, and the pitch-diameter ratio is 16-20 times; when the armor layer is spirally wound by two layers of steel wires, the armor directions of the two layers of steel wires are the same direction or opposite directions, the armor direction of the outer layer of steel wires is the left direction, and the pitch diameter ratio of the inner layer of steel wires is 2 larger than that of the outer layer of steel wires.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111252775.4A CN113990558A (en) | 2021-10-27 | 2021-10-27 | Dry-type insulation submarine optical cable |
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| CN202111252775.4A CN113990558A (en) | 2021-10-27 | 2021-10-27 | Dry-type insulation submarine optical cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119132731A (en) * | 2024-11-12 | 2024-12-13 | 国网浙江省电力有限公司温州供电公司 | A DC submarine cable |
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| CN101241213A (en) * | 2008-02-13 | 2008-08-13 | 中天科技海缆有限公司 | Deep sea optic cable and its manufacture method |
| CN207068509U (en) * | 2017-08-22 | 2018-03-02 | 宜昌信通电缆有限公司 | Heavy in section photoelectric high-voltage submarine cable |
| CN207319745U (en) * | 2017-08-25 | 2018-05-04 | 青岛汉缆海洋工程装备有限公司 | Photoelectric composite submarine cable |
| CN113314261A (en) * | 2021-06-07 | 2021-08-27 | 中天科技海缆股份有限公司 | Flexible direct current submarine cable |
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2021
- 2021-10-27 CN CN202111252775.4A patent/CN113990558A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2852336Y (en) * | 2005-07-11 | 2006-12-27 | 西安西电光电缆有限责任公司 | High-intensity circle line cable |
| CN101241213A (en) * | 2008-02-13 | 2008-08-13 | 中天科技海缆有限公司 | Deep sea optic cable and its manufacture method |
| CN207068509U (en) * | 2017-08-22 | 2018-03-02 | 宜昌信通电缆有限公司 | Heavy in section photoelectric high-voltage submarine cable |
| CN207319745U (en) * | 2017-08-25 | 2018-05-04 | 青岛汉缆海洋工程装备有限公司 | Photoelectric composite submarine cable |
| CN113314261A (en) * | 2021-06-07 | 2021-08-27 | 中天科技海缆股份有限公司 | Flexible direct current submarine cable |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119132731A (en) * | 2024-11-12 | 2024-12-13 | 国网浙江省电力有限公司温州供电公司 | A DC submarine cable |
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