CN101807450B - Sea electric power cable - Google Patents

Sea electric power cable Download PDF

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Publication number
CN101807450B
CN101807450B CN2010101341113A CN201010134111A CN101807450B CN 101807450 B CN101807450 B CN 101807450B CN 2010101341113 A CN2010101341113 A CN 2010101341113A CN 201010134111 A CN201010134111 A CN 201010134111A CN 101807450 B CN101807450 B CN 101807450B
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layer
conductor
electric power
power cable
steel wire
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CN101807450A (en
Inventor
屠亦军
李捍平
何旭涛
郑新龙
张秀峰
胡文侃
闫循平
李程
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Zhoushan Power Authority Zhejiang Electric Power Corp
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Zhoushan Power Authority Zhejiang Electric Power Corp
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Abstract

The invention relates to a sea electric power cable which comprises a conductor (1), semi-conduction layer (2), insulation layer (3), a buffer layer (4), a lead casing (5), an inner jacket layer (6), an armor layer (7) and an armored outer protective layer (8) which are arranged from inside to outside. The invention is characterized in that the inner jacket layer (6) is a mixed layer formed by the end-to-end connection of the semi-conduction layer and the insulation layer in series. Compared with the prior art, the armored inner jacket layer adopted by the invention is the mixed layer formed by the end-to-end connection of semi-conduction layer and insulation layer in series. Such design has the advantage that the underwater portion and the onshore portion of the sea electric power cable comprise different inner jacket layers, wherein the underwater portion is an anticorrosive semi-conduction layer, thereby effectively solving the problem of induced potential, and further solving the problem of circular current; and the onshore portion is an insulation layer which is the same structure as the common electric power cable, thereby realizing cross interconnection, and further achieving the purposes of reducing loss and raising current capacity.

Description

A kind of sea electric power cable
Technical field
The present invention relates to a kind of submarine cable technical field that is used for, especially refer to a kind of power cable that is used for the seabed.
Background technology
At present; Submarine cable generally can produce induced potential on metallic sheath, so need to adopt the method for ground connection to eliminate, make it safe operation; But can produce circulation loss again; The ampacity of cable reduces greatly, can not make full use of the current capacity of cable conductor, has caused the wasting of resources to a certain extent.The structure of existing submarine cable is generally all added the layer of polyethylene sheath in the metallic sheath outside, makes it the anticorrosive coat as submarine cable, and has insulation property.In order to eliminate the electrical potential difference between submarine cable metallic sheath and the armour; Common practices is; Every at a distance from about 500 meters with the pe sheath strip off; Be welded on an end of one or more braiding copper cash on the metallic sheath, the other end contacts with wire armoring through the opening of pe sheath, thereby eliminates the electrical potential difference between metallic sheath and the armour.But the cable that adopts this method to lay, its metallic sheath discharge is inhomogeneous, and the opening part on the pe sheath is also thrown off easily, makes the cable water inlet easily, and antiseptic effect can't satisfy.
Existing a kind of patent No. is 200720108676.8 and is called that the Chinese utility model patent of " a kind of seabed cross-linked power cable " discloses a kind of structure; Its structure comprises core, armouring inner covering, armour and the armouring outer jacket that is provided with from inside to outside; Characteristics are that armour is made up of around the nonmagnetic metal silk of arranging many uniform ring, and the nonmagnetic metal silk is outside equipped with the plastics anticorrosive coat; Advantage is to substitute the zinc-coated wire sheathed structure with nonmagnetic metal silk sheathed structure both to have exempted serious eddy current, the magnetic hysteresis loss of taking the zinc-coated wire sheathed structure and producing; It is nearly 30% to make it allow ampacity to exceed than the permission ampacity of zinc-coated wire armoured cable, has guaranteed the tensile strength of seabed cross-linked power cable again; Be outside equipped with the plastics anticorrosive coat at the nonmagnetic metal silk, make nonmagnetic metal silk armoured cable place seawater for a long time and can not be corroded.But its shortcoming is it has done improvement to armour, and has above-mentioned shortcoming equally, also the tensile strength of conductor is not improved, and this cable amount of copper consuming is big, cost is higher so it is made, so its structure awaits to improve.
Summary of the invention
Technical problem to be solved by this invention is to above-mentioned prior art present situation the sea electric power cable that a kind of loss is few and current-carrying is high to be provided.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: this sea electric power cable; Comprise the conductor, semi-conductive layer, insulating barrier, resilient coating, plumbous cover, inner restrictive coating, armour and the armouring external protection that are provided with from the inside to the outside, it is characterized in that: the mixed layer that said inner restrictive coating is in series by semi-conductive layer and two kinds of forms of insulating barrier from beginning to end.
As improvement, said insulation inner restrictive coating may be selected to be polyethylene layer, and said semiconductive inner restrictive coating can be preferably the semiconductive polyethylene layer.
Improve, said conductor can be selected the mixing core be made up of steel wire lead and aluminum conductor again, and said steel wire lead is positioned at the center of conductor, and steel wire lead and aluminum conductor are the formed conductor of steel reinforced aluminium conductor structure.
Improve, said steel reinforced aluminium conductor structure is meant: some strands of steel wire leads are positioned at the center again, and some strands of aluminum conductors are outside the steel wire lead and be twisted into the steel reinforced aluminium conductor conductor each other.
Improve again; Said armour is made up of many galvanized steel wire ropes; Said galvanized steel wire rope is positioned at the structure that same periphery distributes and the protective layer that forms with cross section; Certainly, said armour also can belong to silk by many zinc-coated wires and some aluminium alloys and form, and said galvanized steel wire rope and some aluminium alloys belong to thread to be spaced and to be positioned at the structure of same periphery distribution and the protective layer that forms with cross section.
Improve, said armouring external protection can be the pitch outerwrap layer of polypropylene rope as inner reinforcement again.
Compared with prior art, the present invention adopts the mixed layer that the armouring inner restrictive coating is in series by semi-conductive layer and two kinds of forms of insulating barrier from beginning to end.The advantage of this design be sea electric power cable under water the part with land part by different inner restrictive coating structures, underwater portion is the corrosion-resistant semi-conductive layer, can effectively solve the problem of induced potential like this, and then solve circulation problem; And land part is a layer insulating, and is identical with the structure of common electric power cable, can realize cross interconnectedly like this, and then reaches and reduces the wastage, and improves the purpose of ampacity.
Description of drawings
Fig. 1 is the structure cutaway view of the embodiment of the invention.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
As shown in Figure 1; The sea electric power cable of present embodiment; Comprise the conductor 1, semi-conductive layer 2, insulating barrier 3, resilient coating 4, plumbous cover 5, inner restrictive coating 6, armour 7 and the armouring external protection 8 that are provided with from the inside to the outside, the mixed layer that said inner restrictive coating 6 is in series by semi-conductive layer and two kinds of forms of insulating barrier from beginning to end.Above-mentioned insulation inner restrictive coating is chosen as polyethylene layer, and the semiconductive inner restrictive coating is chosen as the semiconductive polyethylene layer.The mixing core that conductor 1 is made up of steel wire lead and aluminum conductor, this steel wire lead is positioned at the center of conductor 1, and steel wire lead and aluminum conductor are the formed conductor 1 of steel reinforced aluminium conductor structure.So-called steel reinforced aluminium conductor structure is meant: some strands of steel wire leads are positioned at the center, and some strands of aluminum conductors are outside the steel wire lead and be twisted into the steel reinforced aluminium conductor conductor each other.Armour 7 is made up of many galvanized steel wire ropes 71, and said galvanized steel wire rope 71 is positioned at the structure that same periphery distributes and the protective layer that forms with cross section.Certainly; Armour 7 also can belong to silk by many zinc-coated wires 71 and some aluminium alloys and form; Said galvanized steel wire rope 71 and some aluminium alloys belong to silk to be spaced and to be positioned at the structure that same periphery distributes and the protective layer that forms specifically can be decided by designing requirement with cross section.Armouring external protection 8 is the pitch outerwrap layer of polypropylene rope as inner reinforcement
Further specify in the face of the present invention down.
As shown in Figure 1; A kind of sea electric power cable; Be divided under water and land two parts; Underwater portion comprises conductor 1, semi-conductive layer 2, insulating barrier 3, resilient coating 4, plumbous cover 5, semi-conductive layer inner restrictive coating 6, armour 7, the serving 8 that is provided with from inside to outside, and land part comprises conductor 1, semi-conductive layer 2, insulating barrier 3, resilient coating 4, plumbous cover 5, insulating barrier inner restrictive coating 6, armour 7, the serving 8 that is provided with from inside to outside.

Claims (6)

1. sea electric power cable; Comprise the conductor (1), semi-conductive layer (2), insulating barrier (3), resilient coating (4), plumbous cover (5), inner restrictive coating (6), armour (7) and the armouring external protection (8) that are provided with from the inside to the outside, it is characterized in that: the mixed layer that said inner restrictive coating (6) is in series by two kinds of forms of semiconductive inner restrictive coating and insulation inner restrictive coating from beginning to end; The inner restrictive coating of the land part of said sea electric power cable is the insulation inner restrictive coating, and the inner restrictive coating of underwater portion is the semiconductive inner restrictive coating, and said insulation inner restrictive coating is a polyethylene layer; Said semiconductive inner restrictive coating is the semiconductive polyethylene layer.
2. sea electric power cable according to claim 1; It is characterized in that: the mixing core that said conductor (1) is made up of steel wire lead and aluminum conductor; Said steel wire lead is positioned at the center of conductor (1), and steel wire lead and aluminum conductor are the formed conductor of steel reinforced aluminium conductor structure (1).
3. sea electric power cable according to claim 2 is characterized in that: said armour (7) is made up of many galvanized steel wire ropes (71), and said galvanized steel wire rope (71) is positioned at the structure that same periphery distributes and the protective layer that forms with cross section.
4. sea electric power cable according to claim 2; It is characterized in that: said armour (7) belongs to silk by many galvanized steel wire ropes (71) and some aluminium alloys and forms, and said galvanized steel wire rope (71) and some aluminium alloys belong to silk to be spaced and to be positioned at the structure of same periphery distribution and the protective layer that forms with cross section.
5. sea electric power cable according to claim 2 is characterized in that: said steel reinforced aluminium conductor structure is meant: some strands of steel wire leads are positioned at the center, and some strands of aluminum conductors are outside the steel wire lead and be twisted into the steel reinforced aluminium conductor conductor each other.
6. according to arbitrary described sea electric power cable in the claim 1 to 5, it is characterized in that: said armouring external protection (8) is the pitch outerwrap layer of polypropylene rope as inner reinforcement.
CN2010101341113A 2010-03-29 2010-03-29 Sea electric power cable Active CN101807450B (en)

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CN101807450B true CN101807450B (en) 2012-10-31

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Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101950620B (en) * 2010-09-14 2012-01-04 上海电缆研究所 Sectional type submarine cable
CN102903427A (en) * 2012-09-26 2013-01-30 江苏山峰电缆有限公司 Novel steel reinforced aluminum stranded wire cable
CN103456397A (en) * 2013-08-23 2013-12-18 江苏远方电缆厂有限公司 Buried cable laid in seabed
CN103903702A (en) * 2014-03-06 2014-07-02 安徽猎塔电缆集团有限公司 Power cable
RU2715410C2 (en) * 2015-11-10 2020-02-28 Нв Бекаэрт Са Cables for electric power transmission
CN105336439A (en) * 2015-12-08 2016-02-17 无锡江南电缆有限公司 Self-bearing tensile-type high-power coaxial cable
CN105390208A (en) * 2015-12-08 2016-03-09 无锡江南电缆有限公司 Self-bearing watertight type high-power coaxial cable
CN105355304A (en) * 2015-12-08 2016-02-24 无锡江南电缆有限公司 Self-bearing anti-compression large power coaxial composite cable
CN105374462A (en) * 2015-12-08 2016-03-02 无锡江南电缆有限公司 Self-bearing coaxial cable
CN109559846A (en) * 2017-09-27 2019-04-02 中天科技海缆有限公司 Single sea cable
KR20210057739A (en) * 2018-09-21 2021-05-21 엔브이 베카에르트 에스에이 Power transmission cable

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2847469Y (en) * 2005-11-25 2006-12-13 河北华通线缆制造有限公司 Shield wrapping bag reinforced rubber sleeve soft cable for coal cutter
CN200986832Y (en) * 2006-09-20 2007-12-05 青岛汉缆集团有限公司 Photoelectric combination type subsea cable
CN201045710Y (en) * 2007-04-29 2008-04-09 宁波东方电缆股份有限公司 Seabed crosslinked power cable
CN201149789Y (en) * 2007-09-20 2008-11-12 上海南大集团有限公司 Power cable
CN201302852Y (en) * 2008-10-27 2009-09-02 浙江万马集团特种电子电缆有限公司 Coaxial cable used for galvanometer of nuclear power plant reactor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2847469Y (en) * 2005-11-25 2006-12-13 河北华通线缆制造有限公司 Shield wrapping bag reinforced rubber sleeve soft cable for coal cutter
CN200986832Y (en) * 2006-09-20 2007-12-05 青岛汉缆集团有限公司 Photoelectric combination type subsea cable
CN201045710Y (en) * 2007-04-29 2008-04-09 宁波东方电缆股份有限公司 Seabed crosslinked power cable
CN201149789Y (en) * 2007-09-20 2008-11-12 上海南大集团有限公司 Power cable
CN201302852Y (en) * 2008-10-27 2009-09-02 浙江万马集团特种电子电缆有限公司 Coaxial cable used for galvanometer of nuclear power plant reactor

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