CN111584137B - Low-induction-voltage submarine cable and preparation method thereof - Google Patents
Low-induction-voltage submarine cable and preparation method thereof Download PDFInfo
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- CN111584137B CN111584137B CN202010461621.5A CN202010461621A CN111584137B CN 111584137 B CN111584137 B CN 111584137B CN 202010461621 A CN202010461621 A CN 202010461621A CN 111584137 B CN111584137 B CN 111584137B
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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
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1875—Multi-layer sheaths
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1895—Internal space filling-up means
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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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- 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
- H01B9/028—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients with screen grounding means, e.g. drain wires
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Abstract
The utility model provides a low induction voltage submarine cable, includes cable insulation sinle silk and the first shielding layer, insulating lining, first armor, inner cushion layer, second armor and outer jacket, the conductive structure layer of cladding in proper order, and first shielding layer and second armor pass through the conductive structure layer short circuit and connect, and first armor includes an at least optical element, many filler strips. According to the invention, through the selection of the opening position of the insulating lining layer and the position of the conductive material passing through the gap between the two filling strips in the first armor layer, the damage of the conductive material to the optical unit is avoided, and through the transitional protection of the conductive material, the conductive material is prevented from being damaged in the advancing process of the cable core; the induced voltage and the thermal resistance loss of the submarine cable can be effectively reduced, and the fault short-circuit current and the rated current-carrying capacity of the submarine cable are improved; meanwhile, the preparation process of the submarine cable joint is improved, and the reliability of the submarine cable grounding mode and the stability of the product performance are effectively ensured.
Description
Technical Field
The invention belongs to the technical field of power cable production, and particularly relates to a low-induction-voltage submarine cable and a preparation method thereof.
Background
Due to the particularity of the large-length laying environment of the submarine cable, most of the existing three-phase alternating-current submarine cables adopt a mode of grounding at two ends to reduce induced voltage. However, for the submarine cable structure of the power cable core with the large-length insulating sheath, after the grounding mode at two ends is adopted, the middle section of the submarine cable in a long distance cannot be grounded, and under the conditions of actual normal operation, short-circuit fault, operation, thunder and lightning and the like, very high induced voltage can be generated, so that potential safety hazards of electric shock can be caused to operating personnel, and meanwhile, irreversible damage can be caused to electrical appliances such as terminals and the like, and serious damage consequences can be generated.
In order to solve the problems, the commonly adopted short-circuit point interconnection grounding submarine cable structure in the prior art mainly adopts a conductive structure to short-circuit a metal shielding layer and a metal armor layer in the production process. The short-circuit structure can play a role in conducting so as to increase transmission current and reduce thermal resistance loss. However, in the prior art, a preparation method of a submarine cable with a short-circuit structure generally includes, for example, application publication No. (CN 107610832a), destructively opening an insulating sheath, fixing a conductive structure on a metal shielding layer by using a thermal welding method, extending the other end of the insulated sheath to an outer metal armor layer through an opened insulating polyethylene sheath and a filling liner layer, and fixing the insulated sheath and the filling liner layer on an armor metal wire by using a welding method to form an interconnection short-circuit effect. In the above method, the destructive opening of the insulating sheath not only affects the insulating effect, but also causes inconvenience in operation,
in addition, for a single-core submarine cable structure in the prior art, the filling layer is mainly in a form of mixed stranding of the filling strip and the optical unit. In the grounding mode, waterproof sealant is adopted to repair the sheath in the process of restoring the water resistance of the notch of the insulating sheath, and the process is difficult to ensure the water resistance; simultaneously when the insulating lining layer of filling of submarine cable adopts light unit + packing strip mixed transposition form, if the open point position of insulating sheath when improper or recovery point external diameter is bigger than normal, carrying out light unit + packing strip transposition in-process and causing the light unit damage easily, serious meeting causes the light unit fracture at the wire armor in-process. Therefore, the structure of the short-circuit point interconnection grounding submarine cable and the research on the manufacturing process thereof are still one of the key topics in the manufacturing and laying process of the submarine cable.
Disclosure of Invention
In view of the above, the present invention provides a low-induction-voltage submarine cable with stable performance and a preparation method thereof.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a low-induction-voltage submarine cable, which comprises a cable insulation wire core, a first shielding layer, an insulation lining layer, a first armor layer, an inner cushion layer, a second armor layer and an outer protective layer, wherein the first shielding layer, the insulation lining layer, the first armor layer, the inner cushion layer, the second armor layer and the outer protective layer are sequentially coated on the cable insulation wire core; when the first armor layer comprises a plurality of light units, at least two filling strips are arranged between the two light units; the conductive structure layer penetrates through the first armor layer, namely the conductive structure layer penetrates through a gap between the two filling strips.
Specifically, cable insulation core includes the conductor that blocks water, conductor shielding layer, crosslinked polyethylene insulating layer, insulation shielding layer, first water blocking layer, second shielding layer, the second water blocking layer that sets gradually from inside to outside.
Preferably, the water-blocking conductor is one selected from the group consisting of a combination of a layered longitudinally-wrapped water-blocking tape and a wound water-blocking yarn, and a longitudinally-wrapped water-blocking tape; the conductor shielding layer is selected from one of a combination of a semi-conductive water-blocking tape, a semi-conductive strapping tape and an extruded super-smooth semi-conductive material, or a combination of the semi-conductive strapping tape and the extruded super-smooth semi-conductive material.
Specifically, the filler strip is a mixed structure of a nonmetal filler strip and a metal wire, or the nonmetal filler strip.
Specifically, the second armor layer is one selected from only steel wires, only copper wires, steel wires and copper wires and high-strength nonmetal filler strips.
Specifically, a continuous sealing structure is adopted for the first shielding layer, the first shielding layer is made of alloy lead or aluminum and directly coated on the cable insulation wire core, and the insulation lining layer is made of an insulation material with polyethylene as a base material.
Specifically, the conductive material is a silver braided belt or a copper alloy belt, and at least one conductive structure layer is arranged on the low-induction-voltage submarine cable.
A second object of the present invention is to provide a method for preparing the low induction voltage submarine cable, comprising the steps of:
s1, position selection and opening: selecting an opening at a position corresponding to the insulating lining layer below two adjacent filling strips of the first armor layer along the wrapping direction of the first armor layer, making a first mark, opening the insulating lining layer corresponding to the first mark, exposing the first shielding layer, and cleaning the first shielding layer at the opening;
s2, welding a conductive structure layer: penetrating the conductive material through the opening and fixedly welding the conductive material and the first shielding layer;
s3, water-blocking sealing of the insulating lining layer: wrapping the opening through which the conductive material passes in the step S2 to be flat by using a polytetrafluoroethylene insulating tape, heating at a high temperature for curing, recovering and sealing, and winding the insulating lining layer corresponding to the welding point by using a sealing tape;
s4, transitional protection of the conductive material: respectively winding and fixing the reserved conductive material pulled out from the opening on the insulating lining layer, the inner part of the first armor layer before armoring, the surface of the first armor layer and the inner part of the second armor layer before armoring by using a strong adhesive tape;
s5, welding a welding point of a second armor layer: leading the reserved conductive material after fixing out to the surface of the second armor layer through the second armor layer, winding the conductive material for 2-3 circles on the second armor layer, and then welding and fixing the reserved conductive material on the second armor layer;
s6, product marking: and producing a layer of the outer protective layer outside the second armor layer, and marking the short-circuit position of the conductive material in the step S5 on the surface to obtain the low-induction-voltage submarine cable.
Specifically, the calculation method of the required length of the conductive material comprises the following steps: l is nxpi × D + M; wherein, L is the length of the conductive material and the unit is millimeter; d is the cable diameter of second armor, and N is the conducting material number of turns of twining, and M is the redundancy value, and M is 5mm-15 mm.
Specifically, in step S4, the transition protection of the conductive material includes the following steps:
s41, placing the reserved conductive material pulled out from the opening along the axial direction of the wire core, then wrapping the conductive material by using a cotton tape according to the requirement of 50% overlapping rate, and fixing and protecting by using a strong adhesive tape to obtain an intermediate;
s42, enabling the reserved conductive materials to enter the first armor layer along with the intermediate, paving the reserved conductive materials on the surface of a cable core in the armor direction of the first armor layer before entering an armor mold, and winding and fixing the reserved conductive materials by using a strong adhesive tape;
s43, after the first armor layer is produced, leading the conductive material out of the surface of the first armor layer, and winding and fixing the conductive material by using a strong adhesive tape;
and S44, enabling the reserved conductive materials to enter a second armor layer along with the cable core, paving the reserved conductive materials on the surface of the cable core in the armor direction of the second armor layer before entering an armor mould, and winding and fixing the reserved conductive materials by using a strong adhesive tape.
Compared with the prior art, the damage of the conductive material to the optical unit is avoided by selecting the opening position of the insulating lining layer and enabling the conductive material to pass through the gap between the two filling strips in the first armor layer, and the conductive material is prevented from being damaged in the advancing process of the cable core through transitional protection of the conductive material; according to the invention, one end of a conductive material is welded on a first shielding layer, and the other end of the conductive material extends to a second armor layer by penetrating through the first armor layer and is welded with the second armor layer, so that an interconnection short circuit effect is formed; by the grounding method, the induced voltage and the thermal resistance loss of the submarine cable can be effectively reduced, and the fault short-circuit current and the rated current-carrying capacity of the submarine cable are improved; meanwhile, the preparation process of the submarine cable joint is improved, and the reliability of the submarine cable grounding mode and the stability of the product performance are effectively ensured.
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 cross-sectional view of the present invention;
FIG. 2 is a partial schematic view of the present invention.
Reference numerals and component parts description referred to in the drawings:
1. a water blocking conductor; 2. a conductor shield layer; 3. a crosslinked polyethylene insulating layer; 4. an insulating shield layer; 5. a first water resistant layer; 6. a second shielding layer; 7. a second water resistant layer; 8. a first shielding layer; 9. an insulating liner layer; 10. a conductive structure layer; 11. a first armor layer; 12. an inner cushion layer; 13. a second armor layer; 14. an outer jacket.
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.
The invention provides a low-induction-voltage submarine cable which comprises a cable insulation wire core, a first shielding layer 8, an insulation lining layer 9, a first armor layer 11, an inner cushion layer 12, a second armor layer 13, an outer protective layer 14 and a conductive structure layer 10, wherein the first shielding layer 8, the second armor layer 13 and the conductive structure layer 10 are sequentially coated on the cable insulation wire core, the first shielding layer 8 and the second armor layer 13 are in short circuit connection through the conductive structure layer 10, and the cable insulation wire core comprises a water-blocking conductor 1, a conductor shielding layer 2, a cross-linked polyethylene insulation layer 3, an insulation shielding layer 4, a first water-blocking layer 5, a second shielding layer 6 and a second water-blocking layer 7 which are sequentially arranged from inside to outside.
The water-blocking conductor 1 is one selected from a combination of a layered longitudinally-wrapped water-blocking tape and a wound water-blocking yarn and a longitudinally-wrapped water-blocking tape, and is used for ensuring the water-blocking performance of the conductor.
The conductor shielding layer 2 is one selected from a combination of a semi-conductive water-blocking tape, a semi-conductive strapping tape and an extruded super-smooth semi-conductive material, or a combination of the semi-conductive strapping tape and the extruded super-smooth semi-conductive material.
First shielding layer 8 adopts continuous seal structure, and first shielding layer 8 is alloy lead or aluminium direct cladding on second water-proof layer 7 around the covering, can regard as radial waterproof layer.
The second shielding layer 6 is made of plastic material.
The insulating lining layer 9 is made of an insulating material with polyethylene as a base material and is extruded on the first shielding layer 8.
The first armor layer 11 includes at least one optical unit, a plurality of filler strips. The filler strip is a mixed structure of a nonmetal filler strip and a metal wire or the nonmetal filler strip. The optical unit comprises an optical fiber, a stainless steel tube and a PE sheath.
An included angle a is formed between the first armor layer 11 and the radial projection of the cable insulated wire core, the included angle a is 20-60 degrees, and the first armor layer 11 is installed along the included angle, namely the armor direction along the first armor layer 11; when the first armor layer 11 includes a plurality of optical units, at least two filler strips are arranged between the two optical units; the conductive structure layer 10 passes through the first armor layer 11, that is, the conductive structure layer 10 passes through the gap between the two filler strips. The conducting structure passes through the position of first armor 11, and with packing strip direct contact, do not contact with the light unit, avoid the light unit to be crushed or the fracture in short circuit point position.
The second armor layer 13 is one selected from a steel wire only, a copper wire only, a steel wire and a copper wire, and a high-strength non-metallic filler strip. An included angle b is formed between the second armor layer 13 and the radial projection of the cable insulated wire core, the included angle b is 20-60 degrees, and the second armor layer 13 is installed along the included angle, namely the armor direction along the second armor layer 13.
The conductive structure layer 10 is made of a conductive material, the conductive material is a silver braided belt or a copper alloy belt, and at least one conductive structure layer 10 is arranged on the low-induction-voltage submarine cable.
The invention also provides a preparation method of the submarine cable with the low induction voltage, which comprises the following steps:
s1, position selection and opening: along the wrapping direction of the first armor layer 11, selecting an opening at the position corresponding to the insulating lining 9 below two adjacent filling strips of the first armor layer 11, making a first mark, opening the insulating lining 9 corresponding to the first mark to expose the first shielding layer 8, and cleaning the first shielding layer 8 at the opening; here, acetone and asphalt cleaning agents are selected to clean the first shielding layer 8;
s2, welding the conductive structure layer 10: passing a conductive material through the opening and fixedly welding the conductive material to the first shielding layer 8; in the step of the invention, a lead melting mode can be adopted, and a conductive material is fixed on the first shielding layer 8 by using a lead strip or a silver wire;
s3, water-blocking sealing of the insulating lining 9: wrapping the opening through which the conductive material passes in the step S2 to be flat by using a polytetrafluoroethylene insulating tape, heating at high temperature, curing, recovering and sealing, and winding the insulating lining 9 corresponding to the welding point by using a sealing tape; the double-layer sealing structure can improve the sealing property of the splitting point and the insulating property of the sheath, and ensure the requirement on the water resistance of the submarine cable;
s4, transitional protection of the conductive material:
(S41, placing the reserved conductive material pulled out from the opening along the axial direction of the wire core, then wrapping the conductive material by using a cotton tape according to the requirement of 50% overlapping rate, and fixing and protecting by using a strong adhesive tape to obtain an intermediate;
s42, enabling the reserved conductive materials to enter a first armor layer 11 along with an intermediate, before entering an armor mold, paving the reserved conductive materials on the surface of a cable core in the armor direction of the first armor layer 11, and winding and fixing the reserved conductive materials by using a strong adhesive tape;
s43, after the first armor layer 11 is produced, leading out the conductive material to the surface of the first armor layer 11, and winding and fixing the conductive material by using a strong adhesive tape;
s44, enabling the reserved conductive materials to enter a second armor layer 12 along with a cable core, before entering an armor mould, paving the reserved conductive materials to be arranged on the surface of a cable core according to the armor direction of the second armor layer 12, and winding and fixing the reserved conductive materials by using a strong adhesive tape)
S5, welding a welding point of a second armor layer 13: leading the fixed reserved conductive material out of the second armor layer 13 to the surface of the second armor layer, winding the conductive material on the second armor layer 13 for 2-3 circles, and welding and fixing the reserved conductive material on the second armor layer 13;
s6, product marking: and producing an outer protective layer 14 outside the second armor layer 13, and marking the short circuit position of the conductive material in the step S5 on the surface to obtain the low-induction-voltage submarine cable.
The calculation method of the required length of the conductive material comprises the following steps: l is nxpi × D + M; wherein, L is the length of the conductive material and the unit is millimeter; d is the cable diameter of second armor 13, and N is the conducting material number of turns of twining, and M is the redundancy value, and M is 5mm-15 mm.
The grounding method for improving the induced voltage of the insulated sheath submarine cable mainly comprises the steps of arranging a conductive structure layer 10 of one or more short-circuit points at the middle of the submarine cable section in the length direction, short-circuiting a first shielding layer 8 and a first armor layer 11 and a second armor layer 13 in a specific mode, then connecting the sheaths at two ends of the submarine cable and three-phase interconnection grounding of the armors, so that the induced voltage generated under the conditions of short-circuit fault, thunder and lightning, operation and the like of the whole submarine cable can be effectively reduced, the induced voltage is reduced to a controllable range, the safety of personnel operation and submarine cable operation is improved, and the integrity of electrical equipment at a terminal is guaranteed.
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 (9)
1. The preparation method of the low-induction-voltage submarine cable is characterized in that the low-induction-voltage submarine cable comprises a cable insulation wire core, and a first shielding layer, an insulation lining layer, a first armor layer, an inner cushion layer, a second armor layer and an outer protective layer which are sequentially coated on the cable insulation wire core, the submarine cable further comprises a conductive structure layer made of conductive materials, the first shielding layer and the second armor layer are in short circuit connection through the conductive structure layer, and the first armor layer comprises at least one optical unit and a plurality of filling strips; when the first armor layer comprises a plurality of light units, at least two filling strips are arranged between the two light units; the conductive structure layer penetrates through the first armor layer, namely the conductive structure layer penetrates through a gap between the two filling strips; the preparation method of the low-induction-voltage submarine cable comprises the following steps:
s1, position selection and opening: selecting an opening at a position corresponding to the insulating lining layer below two adjacent filling strips of the first armor layer along the wrapping direction of the first armor layer, making a first mark, opening the insulating lining layer corresponding to the first mark, exposing the first shielding layer, and cleaning the first shielding layer at the opening;
s2, welding a conductive structure layer: penetrating the conductive material through the opening and fixedly welding the conductive material and the first shielding layer;
s3, water-blocking sealing of the insulating lining layer: wrapping the opening through which the conductive material passes in the step S2 to be flat by using a polytetrafluoroethylene insulating tape, heating at a high temperature for curing, recovering and sealing, and winding the insulating lining layer corresponding to the welding point by using a sealing tape;
s4, transitional protection of the conductive material: respectively winding and fixing the conductive material on the insulating lining layer, the inner part of the first armor layer before armoring, the surface of the first armor layer and the inner part of the second armor layer before armoring by using a strong adhesive tape;
s5, welding a welding point of a second armor layer: leading the fixed reserved conductive material out of the second armor layer to the surface of the second armor layer, winding the conductive material on the second armor layer for 2-3 circles, and welding and fixing the reserved conductive material on the second armor layer;
s6, product marking: and producing a layer of the outer protective layer outside the second armor layer, and marking the short-circuit position of the conductive material in the step S5 on the surface to obtain the low-induction-voltage submarine cable.
2. The method for preparing a submarine cable according to claim 1, wherein the length of the conductive material is calculated by: l is nxpi × D + M; wherein, L is the length of the conductive material and the unit is millimeter; d is the cable diameter of second armor, and N is the conducting material number of turns of twining, and M is the redundancy value, and M is 5mm-15 mm.
3. The method for preparing a submarine cable according to claim 1, wherein in step S4, the transition protection of the conductive material comprises the following steps:
s41, placing the reserved conductive material pulled out from the opening along the axial direction of the wire core, then wrapping the conductive material by using a cotton tape according to the requirement of 50% overlapping rate, and fixing and protecting by using a strong adhesive tape to obtain an intermediate;
s42, enabling the reserved conductive materials to enter the first armor layer along with the intermediate, paving the reserved conductive materials on the surface of a cable core in the armor direction of the first armor layer before entering an armor mold, and winding and fixing the reserved conductive materials by using a strong adhesive tape;
s43, after the first armor layer is produced, leading the conductive material out of the surface of the first armor layer, and winding and fixing the conductive material by using a strong adhesive tape;
and S44, enabling the reserved conductive materials to enter a second armor layer along with the cable core, paving the reserved conductive materials on the surface of the cable core in the armor direction of the second armor layer before entering an armor mould, and winding and fixing the reserved conductive materials by using a strong adhesive tape.
4. A low induced voltage submarine cable characterized in that: the submarine cable with low induction voltage is prepared by the method for preparing the submarine cable with low induction voltage according to any one of claims 1 to 3, wherein the insulated wire core of the submarine cable comprises a water-blocking conductor, a conductor shielding layer, a crosslinked polyethylene insulating layer, an insulating shielding layer, a first water-blocking layer, a second shielding layer and a second water-blocking layer which are arranged in sequence from inside to outside.
5. The low induction voltage submarine cable according to claim 4, wherein: the water-blocking conductor is one selected from a combination of a layered longitudinally-wrapped water-blocking tape and a wound water-blocking yarn and a longitudinally-wrapped water-blocking tape; the conductor shielding layer is selected from one of a combination of a semi-conductive water-blocking tape, a semi-conductive strapping tape and an extruded super-smooth semi-conductive material, or a combination of the semi-conductive strapping tape and the extruded super-smooth semi-conductive material.
6. A low induced voltage submarine cable characterized in that: the low induction voltage submarine cable according to any one of claims 1 to 3, wherein the filler strip is a mixed structure of a non-metallic filler strip and a metal wire, or a non-metallic filler strip.
7. A low induced voltage submarine cable characterized in that: the low-induction-voltage submarine cable according to any one of claims 1 to 3, wherein said second armor layer is one selected from the group consisting of steel wire only, copper wire only, steel wire and copper wire.
8. A low induced voltage submarine cable characterized in that: the submarine cable with low induction voltage is prepared by the method according to any one of claims 1 to 3, the first shielding layer is of a continuous sealing structure, the first shielding layer is made of alloy lead or aluminum directly coated on the insulated wire core of the cable, and the insulating lining layer is made of an insulating material based on polyethylene.
9. A low induced voltage submarine cable characterized in that: the submarine cable with low induction voltage is prepared by the method for preparing the submarine cable with low induction voltage according to any one of claims 1 to 3, the conductive material is a silver braided belt or a copper alloy belt, and at least one conductive structure layer is arranged on the submarine cable with low induction voltage.
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| CN107195367A (en) * | 2017-06-05 | 2017-09-22 | 江苏亨通高压海缆有限公司 | Ultra-large-section high-voltage low-loss optical fiber composite submarine cable and preparation method thereof |
| CN107610832A (en) * | 2017-09-19 | 2018-01-19 | 江苏亨通高压海缆有限公司 | Submarine cable with ultralow thermal resistance loss and preparation method thereof |
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2020
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| JPH1166978A (en) * | 1997-08-21 | 1999-03-09 | Showa Electric Wire & Cable Co Ltd | Composite submarine cable |
| CN203070806U (en) * | 2013-03-08 | 2013-07-17 | 浙江省电力公司舟山电力局 | Device for reducing AC submarine power cable armor loss |
| CN106098238A (en) * | 2016-08-08 | 2016-11-09 | 中天科技海缆有限公司 | 500kV cross-linked polyethylene insulating submarine power cable |
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| CN107610832A (en) * | 2017-09-19 | 2018-01-19 | 江苏亨通高压海缆有限公司 | Submarine cable with ultralow thermal resistance loss and preparation method thereof |
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Effective date of registration: 20200825 Address after: No.1 Luohu East Road, Lingang Industrial Park, Lufeng City, Shanwei City, Guangdong Province Applicant after: Nanhai Cable Co.,Ltd. Address before: 226010 No. 1 South Road, Nantong economic and Technological Development Zone, Jiangsu, China Applicant before: ZHONGTAN TECHNOLOGY SUBMARINE CABLE Co.,Ltd. Applicant before: JIANGSU ZHONGTIAN TECHNOLOGY Co.,Ltd. Applicant before: Nanhai Cable Co.,Ltd. |
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