CN105825954A - Submarine high-pressure cable good in shielding performance - Google Patents

Submarine high-pressure cable good in shielding performance Download PDF

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Publication number
CN105825954A
CN105825954A CN201610397078.0A CN201610397078A CN105825954A CN 105825954 A CN105825954 A CN 105825954A CN 201610397078 A CN201610397078 A CN 201610397078A CN 105825954 A CN105825954 A CN 105825954A
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parts
layer
outside
conductor
coated
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不公告发明人
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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
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • 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
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/12—Arrangements for exhibiting specific transmission characteristics
    • H01B11/16—Cables, e.g. submarine cables, with coils or other devices incorporated during cable manufacture
    • 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
    • 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
    • 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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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Insulated Conductors (AREA)

Abstract

The invention belongs to the technical field of cables and particularly relates to a submarine high-pressure cable. The submarine high-pressure cable is composed of a conductive unit, a metal shielding layer, a water retention layer, an inner protecting bush, an armor layer, an outer protecting bush and an outer protecting bush protection layer; the conductive unit is composed of a conductor, an insulating layer, an insulation shielding layer and a conductor protecting layer, on any cross section, the circle center of the conductor coincides with the circle center of the insulating layer, the diameter of the insulating layer is 1.5-5 times that of the conductor, and the minimum value of the insulating layer thickness is 1.5 mm; filling rope groups and reinforcing piece groups are distributed outside the inner protecting bush in an alternate mode, and both the filling rope groups and the reinforcing piece groups are tightly attached to the inner protecting bush; the outer protecting bush protection layer is made of polyamide; the insulating layer is made of organosilane crosslinked polyethylene or a special material. The invention further discloses a manufacturing method of the submarine high-pressure cable. The submarine high-pressure cable and the preparation method thereof have the advantages that mechanical property redundancy is more proper, more resources are saved, wear resistance is better, water seepage performance is better, seawater resistance is better, shielding performance is better, and high voltage can be transmitted better.

Description

Shielding properties preferable seabed high tension cable
Technical field
The invention belongs to seabed cable technical field, especially relate to seabed high tension cable and manufacture method thereof.
Background technology
Earth surface is divided into, by each big land, the vast waters communicated with each other and is referred to as ocean, and its gross area of the earth is about 3.6 hundred million square kilometres, and account for that earth surface is long-pending 71%, approximately equal to 2.5 times of land surface, world ocean is a huge treasure-house.It has a large amount of things necessary to the mankind and abundant industrial resources.Five main ocean of the earth are the Pacific Ocean, the Atlantic Ocean and the Indian Ocean, the Arctic Ocean, Antarctic Ocean, and major part is with land and sea-floor relief line as boundary.
Along with developing rapidly of industry, the exploration scale of Yu Haiyang is increased by people day by day, the value of ocean is also more paid attention to by people, for this, need to lay various submarine cable and be used as infrastructure, submarine cable is most commonly used that seabed high tension cable, submarine optical fiber cable, sea floor optoelectronic composite cable.
In prior art, people had carried out research for seabed high tension cable, as: publication No. is CN102290135A, entitled: rated voltage 220kV tri-core photoelectric composite submarine cable, outer layer is draped over one's shoulders including be sequentially distributed from outside to inside, armor and inner liner, three two biphase circumscribed electric units it are provided with in described inner liner, described electric unit and described inner liner surrounded three at gap be all filled with multiple filling unit, three described electric units and all of filling unit whole stranded formation one stock market main core segment of cable, it is surrounded with gluing strap outside the main core segment of extra large cable after stranded, in all of filling unit, at least one of which is light unit, remaining fills unit is gasket for packing, the rated voltage of this kind of cable has reached 220KV.
For another example: publication No. is CN101807450A, entitled: a kind of sea electric power cable; including the conductor (1) arranged from the inside to the outside, semi-conductive layer (2), insulating barrier (3), cushion (4), lead set (5), inner restrictive coating (6), armor (7) and armouring external protection (8);: the mixed layer that described inner restrictive coating (6) is in series by two kinds of form head and the tail of semiconductive inner restrictive coating and insulation inner restrictive coating; the problem solving induced potential; and reduce loss, improve the purpose of current-carrying capacity.
Publication No. is CN101807453A, entitled: for the power cable in seabed; including the core (1) arranged from the inside to the outside, screen layer (2), insulation (3), insulator screen layer and sheath (4), armouring inner cushion layer (5), armor (6) and armouring external protection (7);: described core (1) is made up of steel wire wire and aluminum conductor; described steel wire wire is positioned at the center of core (1), and steel wire wire is twisted into, with aluminum conductor, the core (1) that steel-cored aluminium strand structure is formed jointly.The core that it uses is made up of steel wire wire and aluminum conductor, and described steel wire wire is positioned at the center of core, and steel wire wire is twisted into, with aluminum conductor, the core that steel-cored aluminium strand structure is formed jointly.Be substituted for copper by aluminum, not only save cost, and electric conductivity is also fully consistent with standard, and steel wire therein twists the blend of aluminum, solves again the problem that aluminum conductor tensile strength is not enough.
But, applicant is after repetition test, think that seabed of the prior art high tension cable there is also the space that structure is improved, it is mainly manifested in (1) armor amount of redundancy excessive, mainly tensile strength aspect, primary concern is that the rounding of cable, therefore in prior art, the reinforcement that armor uses, far beyond the tensile strength of demand, causes the waste of resource；(2) anti-wear performance of external protection, water-impervious, anti-sea water performance are to be improved；(3) screen layer can improve further with the set-up mode of insulating barrier, preferably to improve cable performance；(4) material of insulating barrier needs to be researched and developed further so that it is can reach higher pressure grade or performance.
Summary of the invention
In order to solve the problems referred to above, it is an object of the invention to disclose seabed high tension cable and manufacture method thereof, they realize by the following technical solutions.
In first embodiment of the present invention, seabed high tension cable, it is to be made up of the conductive unit 1 set gradually from inside to outside, metal screen layer 2, water blocking layer 3, inner sheath 5, armor, oversheath 8, oversheath protective layer 9；Described conductive unit 1 be coated on outside conductor by conductor 11, extrusion molding insulating barrier 12, be positioned at the insulation screen 13 outside insulating barrier, conductor sheath 14 that extrusion molding is coated on outside insulation screen is constituted, on arbitrary cross section, the center of circle of conductor coincides with the center of circle of insulating barrier, and the diameter of insulating barrier is 1.5～5 times of conductor diameter and thickness of insulating layer minima is 1.5mm；Described armor is made up of gasket for packing 6, reinforcement 7, reinforcement 7 by stiffener 71, be coated on the plastic layer 72 outside stiffener and constitute, gasket for packing is one group with three and is constituted gasket for packing group, reinforcement is one group with three and is constituted reinforcement group, gasket for packing group and reinforcement group are alternately distributed outside inner sheath, and gasket for packing group and reinforcement group are all close to inner sheath；The material of described oversheath protective layer is polyamide；The material of described insulating barrier is organosilane crosslinked polyethylene or by weight, is made up of following raw material: high density polyethylene (HDPE): 70～85 parts, ethylene-vinyl acetate copolymer: 10～20 parts, ethylene-tetrafluoroethylene copolymer: 8～16 parts, magnesium hydroxide: 10～15 parts, antioxidant 1010: 3～5 parts, strontium titanates: 2～4 parts, calcium titanate: 2～4 parts, bismuth titanates: 2～4 parts, magnesium titanate: 2～4 parts, silicon dioxide: 3～5 parts, zirconium dioxide: 3～5 parts.
In second embodiment of the present invention; seabed high tension cable; it is to be made up of the metal screen layer 2 set gradually from inside to outside, water blocking layer 3, tack coat 4, inner sheath 5, armor, oversheath 8, oversheath protective layer 9; there is inside metal screen layer the conductive unit 1 of three two biphase circumscribed settings, three conductive units and metal screen layer phase inscribe；Described conductive unit 1 be coated on outside conductor by conductor 11, extrusion molding insulating barrier 12, be positioned at the insulation screen 13 outside insulating barrier, conductor sheath 14 that extrusion molding is coated on outside insulation screen is constituted, on arbitrary cross section, the center of circle of conductor coincides with the center of circle of insulating barrier, and the diameter of insulating barrier is 1.5～5 times of conductor diameter and thickness of insulating layer minima is 1.5mm；Described armor is made up of gasket for packing 6, reinforcement 7, reinforcement 7 by stiffener 71, be coated on the plastic layer 72 outside stiffener and constitute, gasket for packing is one group with two and is constituted gasket for packing group, gasket for packing group and reinforcement are alternately distributed outside inner sheath, and gasket for packing group and reinforcement are all close to inner sheath；The material of described oversheath protective layer is polyamide；The material of described insulating barrier is organosilane crosslinked polyethylene or by weight, is made up of following raw material: high density polyethylene (HDPE): 70～85 parts, ethylene-vinyl acetate copolymer: 10～20 parts, ethylene-tetrafluoroethylene copolymer: 8～16 parts, magnesium hydroxide: 10～15 parts, antioxidant 1010: 3～5 parts, strontium titanates: 2～4 parts, calcium titanate: 2～4 parts, bismuth titanates: 2～4 parts, magnesium titanate: 2～4 parts, silicon dioxide: 3～5 parts, zirconium dioxide: 3～5 parts.
In 3rd embodiment of the present invention, seabed high tension cable, it is to be made up of the metal screen layer 2 set gradually from inside to outside, water blocking layer 3, tack coat 4, inner sheath 5, armor, oversheath 8, there is inside metal screen layer the conductive unit 1 of three two biphase circumscribed settings, three conductive units and metal screen layer phase inscribe；Described conductive unit 1 be coated on outside conductor by conductor 11, extrusion molding insulating barrier 12, be positioned at the insulation screen 13 outside insulating barrier, conductor sheath 14 that extrusion molding is coated on outside insulation screen is constituted, on arbitrary cross section, the center of circle of conductor coincides with the center of circle of insulating barrier, and the diameter of insulating barrier is 1.5～5 times of conductor diameter and thickness of insulating layer minima is 1.5mm；Described armor is made up of gasket for packing 6, reinforcement 7, reinforcement 7 by stiffener 71, be coated on the plastic layer 72 outside stiffener and constitute, gasket for packing and reinforcement are alternately distributed outside inner sheath, and gasket for packing and reinforcement are all close to inner sheath；The material of described insulating barrier is organosilane crosslinked polyethylene or by weight, is made up of following raw material: high density polyethylene (HDPE): 70～85 parts, ethylene-vinyl acetate copolymer: 10～20 parts, ethylene-tetrafluoroethylene copolymer: 8～16 parts, magnesium hydroxide: 10～15 parts, antioxidant 1010: 3～5 parts, strontium titanates: 2～4 parts, calcium titanate: 2～4 parts, bismuth titanates: 2～4 parts, magnesium titanate: 2～4 parts, silicon dioxide: 3～5 parts, zirconium dioxide: 3～5 parts.
In 4th embodiment of the present invention, seabed high tension cable, it is to be made up of the metal screen layer 2 set gradually from inside to outside, water blocking layer 3, tack coat 4, inner sheath 5, armor, oversheath 8, there is inside metal screen layer the conductive unit 1 of three two biphase circumscribed settings, three conductive units and metal screen layer phase inscribe；Described conductive unit 1 be coated on outside conductor by conductor 11, extrusion molding insulating barrier 12, be positioned at the insulation screen 13 outside insulating barrier, conductor sheath 14 that extrusion molding is coated on outside insulation screen is constituted, on arbitrary cross section, the center of circle of conductor coincides with the center of circle of insulating barrier, and the diameter of insulating barrier is 1.5～5 times of conductor diameter and thickness of insulating layer minima is 1.5mm；Described armor is made up of gasket for packing 6, reinforcement 7, reinforcement 7 by stiffener 71, be coated on the plastic layer 72 outside stiffener and constitute, gasket for packing is one group with two and is constituted gasket for packing group, gasket for packing group and reinforcement are alternately distributed outside inner sheath, and gasket for packing group and reinforcement are all close to inner sheath；The material of described insulating barrier is organosilane crosslinked polyethylene or by weight, is made up of following raw material: high density polyethylene (HDPE): 70～85 parts, ethylene-vinyl acetate copolymer: 10～20 parts, ethylene-tetrafluoroethylene copolymer: 8～16 parts, magnesium hydroxide: 10～15 parts, antioxidant 1010: 3～5 parts, strontium titanates: 2～4 parts, calcium titanate: 2～4 parts, bismuth titanates: 2～4 parts, magnesium titanate: 2～4 parts, silicon dioxide: 3～5 parts, zirconium dioxide: 3～5 parts.
Seabed high tension cable in the present invention the first embodiment, it by the following method step be fabricated by:
The first step: manufacture the step of conductive unit: first take many copper wires or aluminium wire or many copper wires carry out stranded with multiple aluminium wire, forms the conductor of required sectional area；Take organosilane crosslinked polyethylene or by weight again, be made up of following raw material: high density polyethylene (HDPE): 70～85 parts, ethylene-vinyl acetate copolymer: 10～20 parts, ethylene-tetrafluoroethylene copolymer: 8～16 parts, magnesium hydroxide: 10～15 parts, antioxidant 1010: 3～5 parts, strontium titanates: 2～4 parts, calcium titanate: 2～4 parts, bismuth titanates: 2～4 parts, magnesium titanate: 2～4 parts, silicon dioxide: 3～5 parts, zirconium dioxide: 3～5 parts；Put in insulating barrier extruding machine, at the outer plastic extruding insulated layer of conductor, make the center of circle of conductor coincide with the center of circle of insulating barrier, and the diameter of insulating barrier is 1.5～5 times of conductor diameter and thickness of insulating layer minima is 1.5mm；Then insulation screen is formed outside conductive plastics extrusion molding is coated on insulating barrier；Then conductor sheath is formed outside high density polyethylene (HDPE) or medium density polyethylene or polrvinyl chloride or Low Density Polyethylene extrusion molding being coated on insulation screen；
Second step: manufacture the step of metal screen layer: take the mode that steel band or aluminium strip or copper strips are in the way of longitudinally cladding or spiral is wrapped and be coated with outside the conductive unit formed in the first step；Longitudinally during cladding, having overlapping overlap joint, lap width is 2～5mm, and lap-joint's PUR bonds, and the peel strength minima between lap-joint's steel band or between aluminium strip or between copper strips is 1.6N/mm；When spiral is wrapped, front and back having overlapping overlap joint between spiral, lap width is 1～3mm；
3rd step: form the step of water blocking layer: take water blocking layer and be waterstop or non-woven fabrics or polyester band or aluminium-plastic tape is longitudinally coated on outside the metal screen layer manufactured in second step, form water blocking layer；
4th step: manufacture the step of inner sheath: take polyethylene or polrvinyl chloride extrusion molding is coated with the water blocking layer outside formation inner sheath manufactured in the third step；
5th step: manufacture the step of armor: take outside the inner sheath that pre-manufactured gasket for packing and reinforcement helical coated manufacture in the 4th step, wherein reinforcement by stiffener, be coated on the plastic layer outside stiffener and constitute, gasket for packing is one group with three and is constituted gasket for packing group, reinforcement is one group with three and is constituted reinforcement group, gasket for packing group and reinforcement group are alternately distributed outside inner sheath, and gasket for packing group and reinforcement group are all close to inner sheath；The material of stiffener is steel wire or fiberglass reinforced plastics or aramid yarn；The material of plastic layer is polypropylene or linear low density polyethylene or Low Density Polyethylene or high density polyethylene (HDPE)；The diameter of gasket for packing is equal with the diameter of reinforcement；
6th step: manufacture the step of oversheath: be coated on outside the armor that the 5th step is formed by oversheath extruding machine by high density polyethylene (HDPE) or medium density polyethylene extrusion molding, form oversheath；
7th step: manufacture the step of oversheath protective layer: take polyamide and be coated in the 6th step outside the oversheath manufactured by its extrusion molding, forms seabed high tension cable finished product, and the thickness of described oversheath protective layer is 1.0～2.0mm.
Seabed high tension cable in the present invention the second embodiment, it by the following method step be fabricated by:
The first step: manufacture the step of conductive unit: first take many copper wires or aluminium wire or many copper wires carry out stranded with multiple aluminium wire, forms the conductor of required sectional area；Take organosilane crosslinked polyethylene or by weight again, be made up of following raw material: high density polyethylene (HDPE): 70～85 parts, ethylene-vinyl acetate copolymer: 10～20 parts, ethylene-tetrafluoroethylene copolymer: 8～16 parts, magnesium hydroxide: 10～15 parts, antioxidant 1010: 3～5 parts, strontium titanates: 2～4 parts, calcium titanate: 2～4 parts, bismuth titanates: 2～4 parts, magnesium titanate: 2～4 parts, silicon dioxide: 3～5 parts, zirconium dioxide: 3～5 parts；Put in insulating barrier extruding machine, at the outer plastic extruding insulated layer of conductor, make the center of circle of conductor coincide with the center of circle of insulating barrier, and the diameter of insulating barrier is 1.5～5 times of conductor diameter and thickness of insulating layer minima is 1.5mm；Then insulation screen is formed outside conductive plastics extrusion molding is coated on insulating barrier；Then conductor sheath is formed outside high density polyethylene (HDPE) or medium density polyethylene or polrvinyl chloride or Low Density Polyethylene extrusion molding being coated on insulation screen；Above-mentioned steps repeatedly, until forming three conductive units；
Second step: manufacture the step of metal screen layer: take three conductive units two manufactured in the first step biphase circumscribedly stranded or be placed in parallel, conductive unit intertwist body；Take the mode that steel band or aluminium strip or copper strips are in the way of longitudinally cladding or spiral is wrapped again to be close to be coated with outside the conductive unit intertwist body formed in the first step；Longitudinally during cladding, having overlapping overlap joint, lap width is 2～5mm, and lap-joint's PUR bonds, and the peel strength minima between lap-joint's steel band or between aluminium strip or between copper strips is 1.6N/mm；When spiral is wrapped, front and back having overlapping overlap joint between spiral, lap width is 1～3mm；
3rd step: form water blocking layer and the step of tack coat: take water blocking layer and be waterstop or non-woven fabrics or polyester band or aluminium-plastic tape is longitudinally coated on outside the metal screen layer manufactured in second step, form water blocking layer；Take polypropylene extrusion molding to be coated on outside water blocking layer and form tack coat；
4th step: manufacture the step of inner sheath: take polyethylene or polrvinyl chloride extrusion molding is coated with the tack coat outside formation inner sheath manufactured in the third step；
5th step: manufacture the step of armor: take outside the inner sheath that pre-manufactured gasket for packing and reinforcement helical coated manufacture in the 4th step, wherein reinforcement by stiffener, be coated on the plastic layer outside stiffener and constitute, gasket for packing is one group with two and is constituted gasket for packing group, gasket for packing group and reinforcement are alternately distributed outside inner sheath, and gasket for packing group and reinforcement are all close to inner sheath；The material of stiffener is steel wire or fiberglass reinforced plastics or aramid yarn；The material of plastic layer is polypropylene or linear low density polyethylene or Low Density Polyethylene or high density polyethylene (HDPE)；The diameter of gasket for packing is equal with the diameter of reinforcement；
6th step: manufacture the step of oversheath: be coated on outside the armor that the 5th step is formed by oversheath extruding machine by high density polyethylene (HDPE) or medium density polyethylene extrusion molding, form oversheath；
7th step: manufacture the step of oversheath protective layer: take polyamide and be coated in the 6th step outside the oversheath manufactured by its extrusion molding, forms seabed high tension cable finished product, and the thickness of described oversheath protective layer is 1.0～2.0mm.
Seabed high tension cable in the present invention the 3rd embodiment, it by the following method step be fabricated by:
The first step: manufacture the step of conductive unit: first take many copper wires or aluminium wire or many copper wires carry out stranded with multiple aluminium wire, forms the conductor of required sectional area；Take organosilane crosslinked polyethylene or by weight again, be made up of following raw material: high density polyethylene (HDPE): 70～85 parts, ethylene-vinyl acetate copolymer: 10～20 parts, ethylene-tetrafluoroethylene copolymer: 8～16 parts, magnesium hydroxide: 10～15 parts, antioxidant 1010: 3～5 parts, strontium titanates: 2～4 parts, calcium titanate: 2～4 parts, bismuth titanates: 2～4 parts, magnesium titanate: 2～4 parts, silicon dioxide: 3～5 parts, zirconium dioxide: 3～5 parts；Put in insulating barrier extruding machine, at the outer plastic extruding insulated layer of conductor, make the center of circle of conductor coincide with the center of circle of insulating barrier, and the diameter of insulating barrier is 1.5～5 times of conductor diameter and thickness of insulating layer minima is 1.5mm；Then insulation screen is formed outside conductive plastics extrusion molding is coated on insulating barrier；Then conductor sheath is formed outside high density polyethylene (HDPE) or medium density polyethylene or polrvinyl chloride or Low Density Polyethylene extrusion molding being coated on insulation screen；Above-mentioned steps repeatedly, until forming three conductive units；
Second step: manufacture the step of metal screen layer: take three conductive units two manufactured in the first step biphase circumscribedly stranded or be placed in parallel, conductive unit intertwist body；Take the mode that steel band or aluminium strip or copper strips are in the way of longitudinally cladding or spiral is wrapped again to be close to be coated with outside the conductive unit intertwist body formed in the first step；Longitudinally during cladding, having overlapping overlap joint, lap width is 2～5mm, and lap-joint's PUR bonds, and the peel strength minima between lap-joint's steel band or between aluminium strip or between copper strips is 1.6N/mm；When spiral is wrapped, front and back having overlapping overlap joint between spiral, lap width is 1～3mm；
3rd step: form water blocking layer and the step of tack coat: take water blocking layer and be waterstop or non-woven fabrics or polyester band or aluminium-plastic tape is longitudinally coated on outside the metal screen layer manufactured in second step, form water blocking layer；Take polypropylene extrusion molding to be coated on outside water blocking layer and form tack coat；
4th step: manufacture the step of inner sheath: take polyethylene or polrvinyl chloride extrusion molding is coated with the tack coat outside formation inner sheath manufactured in the third step；
5th step: manufacture the step of armor: take outside the inner sheath that pre-manufactured gasket for packing and reinforcement helical coated manufacture in the 4th step, wherein reinforcement by stiffener, be coated on the plastic layer outside stiffener and constitute, gasket for packing and reinforcement are alternately distributed outside inner sheath, and gasket for packing and reinforcement are all close to inner sheath；The material of stiffener is steel wire or fiberglass reinforced plastics or aramid yarn；The material of plastic layer is polypropylene or linear low density polyethylene or Low Density Polyethylene or high density polyethylene (HDPE)；The diameter of gasket for packing is equal with the diameter of reinforcement；
6th step: manufacture the step of oversheath: be coated on outside the armor that the 5th step is formed by oversheath extruding machine by high density polyethylene (HDPE) or medium density polyethylene extrusion molding, form oversheath；Complete the manufacture of seabed high tension cable finished product.
Seabed high tension cable in the present invention the 4th embodiment, it by the following method step be fabricated by:
The first step: manufacture the step of conductive unit: first take many copper wires or aluminium wire or many copper wires carry out stranded with multiple aluminium wire, forms the conductor of required sectional area；Take organosilane crosslinked polyethylene or by weight again, be made up of following raw material: high density polyethylene (HDPE): 70～85 parts, ethylene-vinyl acetate copolymer: 10～20 parts, ethylene-tetrafluoroethylene copolymer: 8～16 parts, magnesium hydroxide: 10～15 parts, antioxidant 1010: 3～5 parts, strontium titanates: 2～4 parts, calcium titanate: 2～4 parts, bismuth titanates: 2～4 parts, magnesium titanate: 2～4 parts, silicon dioxide: 3～5 parts, zirconium dioxide: 3～5 parts；Put in insulating barrier extruding machine, at the outer plastic extruding insulated layer of conductor, make the center of circle of conductor coincide with the center of circle of insulating barrier, and the diameter of insulating barrier is 1.5～5 times of conductor diameter and thickness of insulating layer minima is 1.5mm；Then insulation screen is formed outside conductive plastics extrusion molding is coated on insulating barrier；Then conductor sheath is formed outside high density polyethylene (HDPE) or medium density polyethylene or polrvinyl chloride or Low Density Polyethylene extrusion molding being coated on insulation screen；Above-mentioned steps repeatedly, until forming three conductive units；
Second step: manufacture the step of metal screen layer: take three conductive units two manufactured in the first step biphase circumscribedly stranded or be placed in parallel, conductive unit intertwist body；Take the mode that steel band or aluminium strip or copper strips are in the way of longitudinally cladding or spiral is wrapped again to be close to be coated with outside the conductive unit intertwist body formed in the first step；Longitudinally during cladding, having overlapping overlap joint, lap width is 2～5mm, and lap-joint's PUR bonds, and the peel strength minima between lap-joint's steel band or between aluminium strip or between copper strips is 1.6N/mm；When spiral is wrapped, front and back having overlapping overlap joint between spiral, lap width is 1～3mm；
3rd step: form water blocking layer and the step of tack coat: take water blocking layer and be waterstop or non-woven fabrics or polyester band or aluminium-plastic tape is longitudinally coated on outside the metal screen layer manufactured in second step, form water blocking layer；Take polypropylene extrusion molding to be coated on outside water blocking layer and form tack coat；
4th step: manufacture the step of inner sheath: take polyethylene or polrvinyl chloride extrusion molding is coated with the tack coat outside formation inner sheath manufactured in the third step；
5th step: manufacture the step of armor: take outside the inner sheath that pre-manufactured gasket for packing and reinforcement helical coated manufacture in the 4th step, wherein reinforcement by stiffener, be coated on the plastic layer outside stiffener and constitute, gasket for packing is one group with two and is constituted gasket for packing group, gasket for packing group and reinforcement are alternately distributed outside inner sheath, and gasket for packing group and reinforcement are all close to inner sheath；The material of stiffener is steel wire or fiberglass reinforced plastics or aramid yarn；The material of plastic layer is polypropylene or linear low density polyethylene or Low Density Polyethylene or high density polyethylene (HDPE)；The diameter of gasket for packing is equal with the diameter of reinforcement；
6th step: manufacture the step of oversheath: be coated on outside the armor that the 5th step is formed by oversheath extruding machine by high density polyethylene (HDPE) or medium density polyethylene extrusion molding, form oversheath；Complete the manufacture of seabed high tension cable finished product.
In the present invention, due to reinforcement by stiffener, be coated on the plastic layer outside stiffener and constitute, therefore, the size of stiffener can carry out appropriate design according to mechanical property requirements, and its outside plastic layer achieves tangent, the technology of rounding, i.e. armor amount of redundancy can be transferred to properly, coordinates gasket for packing to order and makes resource more save.
In the present invention, oversheath and presumable oversheath protective layer, make product be provided with the anti-wear performance more excellent than prior art, water-impervious, anti-sea water performance.
In the present invention, screen layer is different with of the prior art from the set-up mode of insulating barrier, and in prior art, screen layer is close to conductor, is actually difficulty with the effect of shielding；Therefore, the present invention makes the shielding properties of cable be substantially improved, not only achieve the eliminating of external disturbance, considerably reduce the impact that conductor self radiation is external simultaneously.
In the present invention, owing to have employed special insulating layer material, and suitably thickness proportion and concentricity, the insulating properties making cable are greatly increased, and through test, the present invention is for the electric power of transmission 500～1000KV, 1000 meters, 30,000 hours, any punch-through is not had to occur.
Simply, easily grasp, the production equipment using cable production firm conventional i.e. can produce the cable making method of the present invention, and therefore, equipment investment is few, more economically practical, makes utilization rate of equipment and installations higher.
Therefore, the present invention has a following main beneficial effect: cable machinery performance redundancy amount is more suitable, resource is more saved, more anti-wear performance, more can water-impervious, more anti-sea water, shielding properties more preferably, more can transmit high voltage.
Accompanying drawing explanation
Fig. 1 is the perspective view after one section of stripping of embodiment 1 of the present invention.
Fig. 2 is the cross-sectional structure schematic diagram after Fig. 1 amplifies.
Fig. 3 is the perspective view after one section of stripping of embodiment 2 of the present invention.
Fig. 4 is the cross-sectional structure schematic diagram after Fig. 3 amplifies.
Fig. 5 is the perspective view after one section of stripping of embodiment 3 of the present invention.
Fig. 6 is the cross-sectional structure schematic diagram after Fig. 5 amplifies.
Fig. 7 is the perspective view after one section of stripping of embodiment 4 of the present invention.
Fig. 8 is the cross-sectional structure schematic diagram after Fig. 7 amplifies.
Detailed description of the invention
Embodiment 1
Asking for an interview Fig. 1 and Fig. 2, seabed high tension cable, it is to be made up of the conductive unit 1 set gradually from inside to outside, metal screen layer 2, water blocking layer 3, inner sheath 5, armor, oversheath 8, oversheath protective layer 9；Described conductive unit 1 be coated on outside conductor by conductor 11, extrusion molding insulating barrier 12, be positioned at the insulation screen 13 outside insulating barrier, conductor sheath 14 that extrusion molding is coated on outside insulation screen is constituted, on arbitrary cross section, the center of circle of conductor coincides with the center of circle of insulating barrier, and the diameter of insulating barrier is 1.5～5 times of conductor diameter and thickness of insulating layer minima is 1.5mm；Described armor is made up of gasket for packing 6, reinforcement 7, reinforcement 7 by stiffener 71, be coated on the plastic layer 72 outside stiffener and constitute, gasket for packing is one group with three and is constituted gasket for packing group, reinforcement is one group with three and is constituted reinforcement group, gasket for packing group and reinforcement group are alternately distributed outside inner sheath, and gasket for packing group and reinforcement group are all close to inner sheath；The material of described oversheath protective layer is polyamide；The material of described insulating barrier is organosilane crosslinked polyethylene or by weight, is made up of following raw material: high density polyethylene (HDPE): 70～85 parts, ethylene-vinyl acetate copolymer: 10～20 parts, ethylene-tetrafluoroethylene copolymer: 8～16 parts, magnesium hydroxide: 10～15 parts, antioxidant 1010: 3～5 parts, strontium titanates: 2～4 parts, calcium titanate: 2～4 parts, bismuth titanates: 2～4 parts, magnesium titanate: 2～4 parts, silicon dioxide: 3～5 parts, zirconium dioxide: 3～5 parts.
The material of described metal screen layer is steel band or aluminium strip or copper strips, is in the way of longitudinally cladding or the wrapped mode of spiral is coated on outside conductive unit；Longitudinally during cladding, having overlapping overlap joint, lap width is 2～5mm, and lap-joint's PUR bonds, and the peel strength minima between lap-joint's steel band or between aluminium strip or between copper strips is 1.6N/mm；When spiral is wrapped, front and back having overlapping overlap joint between spiral, lap width is 1～3mm.
Embodiment 2
Ask for an interview Fig. 3 and Fig. 4; seabed high tension cable; it is to be made up of the metal screen layer 2 set gradually from inside to outside, water blocking layer 3, tack coat 4, inner sheath 5, armor, oversheath 8, oversheath protective layer 9; there is inside metal screen layer the conductive unit 1 of three two biphase circumscribed settings, three conductive units and metal screen layer phase inscribe；Described conductive unit 1 be coated on outside conductor by conductor 11, extrusion molding insulating barrier 12, be positioned at the insulation screen 13 outside insulating barrier, conductor sheath 14 that extrusion molding is coated on outside insulation screen is constituted, on arbitrary cross section, the center of circle of conductor coincides with the center of circle of insulating barrier, and the diameter of insulating barrier is 1.5～5 times of conductor diameter and thickness of insulating layer minima is 1.5mm；Described armor is made up of gasket for packing 6, reinforcement 7, reinforcement 7 by stiffener 71, be coated on the plastic layer 72 outside stiffener and constitute, gasket for packing is one group with two and is constituted gasket for packing group, gasket for packing group and reinforcement are alternately distributed outside inner sheath, and gasket for packing group and reinforcement are all close to inner sheath；The material of described oversheath protective layer is polyamide；The material of described insulating barrier is organosilane crosslinked polyethylene or by weight, is made up of following raw material: high density polyethylene (HDPE): 70～85 parts, ethylene-vinyl acetate copolymer: 10～20 parts, ethylene-tetrafluoroethylene copolymer: 8～16 parts, magnesium hydroxide: 10～15 parts, antioxidant 1010: 3～5 parts, strontium titanates: 2～4 parts, calcium titanate: 2～4 parts, bismuth titanates: 2～4 parts, magnesium titanate: 2～4 parts, silicon dioxide: 3～5 parts, zirconium dioxide: 3～5 parts.
Embodiment 3
Ask for an interview Fig. 5 and Fig. 6, seabed high tension cable, it is to be made up of the metal screen layer 2 set gradually from inside to outside, water blocking layer 3, tack coat 4, inner sheath 5, armor, oversheath 8, there is inside metal screen layer the conductive unit 1 of three two biphase circumscribed settings, three conductive units and metal screen layer phase inscribe；Described conductive unit 1 be coated on outside conductor by conductor 11, extrusion molding insulating barrier 12, be positioned at the insulation screen 13 outside insulating barrier, conductor sheath 14 that extrusion molding is coated on outside insulation screen is constituted, on arbitrary cross section, the center of circle of conductor coincides with the center of circle of insulating barrier, and the diameter of insulating barrier is 1.5～5 times of conductor diameter and thickness of insulating layer minima is 1.5mm；Described armor is made up of gasket for packing 6, reinforcement 7, reinforcement 7 by stiffener 71, be coated on the plastic layer 72 outside stiffener and constitute, gasket for packing and reinforcement are alternately distributed outside inner sheath, and gasket for packing and reinforcement are all close to inner sheath；The material of described insulating barrier is organosilane crosslinked polyethylene or by weight, is made up of following raw material: high density polyethylene (HDPE): 70～85 parts, ethylene-vinyl acetate copolymer: 10～20 parts, ethylene-tetrafluoroethylene copolymer: 8～16 parts, magnesium hydroxide: 10～15 parts, antioxidant 1010: 3～5 parts, strontium titanates: 2～4 parts, calcium titanate: 2～4 parts, bismuth titanates: 2～4 parts, magnesium titanate: 2～4 parts, silicon dioxide: 3～5 parts, zirconium dioxide: 3～5 parts.
Embodiment 4
Ask for an interview Fig. 7 and Fig. 8, seabed high tension cable, it is to be made up of the metal screen layer 2 set gradually from inside to outside, water blocking layer 3, tack coat 4, inner sheath 5, armor, oversheath 8, there is inside metal screen layer the conductive unit 1 of three two biphase circumscribed settings, three conductive units and metal screen layer phase inscribe；Described conductive unit 1 be coated on outside conductor by conductor 11, extrusion molding insulating barrier 12, be positioned at the insulation screen 13 outside insulating barrier, conductor sheath 14 that extrusion molding is coated on outside insulation screen is constituted, on arbitrary cross section, the center of circle of conductor coincides with the center of circle of insulating barrier, and the diameter of insulating barrier is 1.5～5 times of conductor diameter and thickness of insulating layer minima is 1.5mm；Described armor is made up of gasket for packing 6, reinforcement 7, reinforcement 7 by stiffener 71, be coated on the plastic layer 72 outside stiffener and constitute, gasket for packing is one group with two and is constituted gasket for packing group, gasket for packing group and reinforcement are alternately distributed outside inner sheath, and gasket for packing group and reinforcement are all close to inner sheath；The material of described insulating barrier is organosilane crosslinked polyethylene or by weight, is made up of following raw material: high density polyethylene (HDPE): 70～85 parts, ethylene-vinyl acetate copolymer: 10～20 parts, ethylene-tetrafluoroethylene copolymer: 8～16 parts, magnesium hydroxide: 10～15 parts, antioxidant 1010: 3～5 parts, strontium titanates: 2～4 parts, calcium titanate: 2～4 parts, bismuth titanates: 2～4 parts, magnesium titanate: 2～4 parts, silicon dioxide: 3～5 parts, zirconium dioxide: 3～5 parts.
Seabed high tension cable described in arbitrary embodiment in above-mentioned embodiment 2-4, the material of described metal screen layer is steel band or aluminium strip or copper strips, is in the way of longitudinally cladding or the wrapped mode of spiral is coated on the outside that three conductive units are overall；Longitudinally during cladding, having overlapping overlap joint, lap width is 2～5mm, and lap-joint's PUR bonds, and the peel strength minima between lap-joint's steel band or between aluminium strip or between copper strips is 1.6N/mm；When spiral is wrapped, front and back having overlapping overlap joint between spiral, lap width is 1～3mm.
Seabed high tension cable described in arbitrary embodiment in above-mentioned embodiment 2-4, the material of described tack coat is polypropylene.
Seabed high tension cable described in any of the above-described embodiment, described water blocking layer is waterstop or non-woven fabrics or polyester band or aluminium-plastic tape.
Seabed high tension cable described in any of the above-described embodiment, described insulation screen is conductive plastics.
Seabed high tension cable described in any of the above-described embodiment, the material of described protective cover of conductor is high density polyethylene (HDPE) or medium density polyethylene or polrvinyl chloride or Low Density Polyethylene.
Seabed high tension cable described in any of the above-described embodiment, the material of main part of described inner sheath is polyethylene or polrvinyl chloride.
Seabed high tension cable described in any of the above-described embodiment, the material of described oversheath is high density polyethylene (HDPE) or medium density polyethylene.
Seabed high tension cable described in any of the above-described embodiment, the material of described gasket for packing is polypropylene or linear low density polyethylene or Low Density Polyethylene.
Seabed high tension cable described in any of the above-described embodiment, the material of described stiffener is steel wire or fiberglass reinforced plastics or aramid yarn.
Seabed high tension cable described in any of the above-described embodiment, the material of described plastic layer is polypropylene or linear low density polyethylene or Low Density Polyethylene or high density polyethylene (HDPE).
Seabed high tension cable in embodiment 1 of the present invention, it by the following method step be fabricated by:
The first step: manufacture the step of conductive unit: first take many copper wires or aluminium wire or many copper wires carry out stranded with multiple aluminium wire, forms the conductor of required sectional area；Take organosilane crosslinked polyethylene or by weight again, be made up of following raw material: high density polyethylene (HDPE): 70～85 parts, ethylene-vinyl acetate copolymer: 10～20 parts, ethylene-tetrafluoroethylene copolymer: 8～16 parts, magnesium hydroxide: 10～15 parts, antioxidant 1010: 3～5 parts, strontium titanates: 2～4 parts, calcium titanate: 2～4 parts, bismuth titanates: 2～4 parts, magnesium titanate: 2～4 parts, silicon dioxide: 3～5 parts, zirconium dioxide: 3～5 parts；Put in insulating barrier extruding machine, at the outer plastic extruding insulated layer of conductor, make the center of circle of conductor coincide with the center of circle of insulating barrier, and the diameter of insulating barrier is 1.5～5 times of conductor diameter and thickness of insulating layer minima is 1.5mm；Then insulation screen is formed outside conductive plastics extrusion molding is coated on insulating barrier；Then conductor sheath is formed outside high density polyethylene (HDPE) or medium density polyethylene or polrvinyl chloride or Low Density Polyethylene extrusion molding being coated on insulation screen；
Second step: manufacture the step of metal screen layer: take the mode that steel band or aluminium strip or copper strips are in the way of longitudinally cladding or spiral is wrapped and be coated with outside the conductive unit formed in the first step；Longitudinally during cladding, having overlapping overlap joint, lap width is 2～5mm, and lap-joint's PUR bonds, and the peel strength minima between lap-joint's steel band or between aluminium strip or between copper strips is 1.6N/mm；When spiral is wrapped, front and back having overlapping overlap joint between spiral, lap width is 1～3mm；
3rd step: form the step of water blocking layer: take water blocking layer and be waterstop or non-woven fabrics or polyester band or aluminium-plastic tape is longitudinally coated on outside the metal screen layer manufactured in second step, form water blocking layer；
4th step: manufacture the step of inner sheath: take polyethylene or polrvinyl chloride extrusion molding is coated with the water blocking layer outside formation inner sheath manufactured in the third step；
5th step: manufacture the step of armor: take outside the inner sheath that pre-manufactured gasket for packing and reinforcement helical coated manufacture in the 4th step, wherein reinforcement by stiffener, be coated on the plastic layer outside stiffener and constitute, gasket for packing is one group with three and is constituted gasket for packing group, reinforcement is one group with three and is constituted reinforcement group, gasket for packing group and reinforcement group are alternately distributed outside inner sheath, and gasket for packing group and reinforcement group are all close to inner sheath；The material of stiffener is steel wire or fiberglass reinforced plastics or aramid yarn；The material of plastic layer is polypropylene or linear low density polyethylene or Low Density Polyethylene or high density polyethylene (HDPE)；The diameter of gasket for packing is equal with the diameter of reinforcement；
6th step: manufacture the step of oversheath: be coated on outside the armor that the 5th step is formed by oversheath extruding machine by high density polyethylene (HDPE) or medium density polyethylene extrusion molding, form oversheath；
7th step: manufacture the step of oversheath protective layer: take polyamide and be coated in the 6th step outside the oversheath manufactured by its extrusion molding, forms seabed high tension cable finished product, and the thickness of described oversheath protective layer is 1.0～2.0mm.
Seabed high tension cable in embodiment 2 of the present invention, it by the following method step be fabricated by:
The first step: manufacture the step of conductive unit: first take many copper wires or aluminium wire or many copper wires carry out stranded with multiple aluminium wire, forms the conductor of required sectional area；Take organosilane crosslinked polyethylene or by weight again, be made up of following raw material: high density polyethylene (HDPE): 70～85 parts, ethylene-vinyl acetate copolymer: 10～20 parts, ethylene-tetrafluoroethylene copolymer: 8～16 parts, magnesium hydroxide: 10～15 parts, antioxidant 1010: 3～5 parts, strontium titanates: 2～4 parts, calcium titanate: 2～4 parts, bismuth titanates: 2～4 parts, magnesium titanate: 2～4 parts, silicon dioxide: 3～5 parts, zirconium dioxide: 3～5 parts；Put in insulating barrier extruding machine, at the outer plastic extruding insulated layer of conductor, make the center of circle of conductor coincide with the center of circle of insulating barrier, and the diameter of insulating barrier is 1.5～5 times of conductor diameter and thickness of insulating layer minima is 1.5mm；Then insulation screen is formed outside conductive plastics extrusion molding is coated on insulating barrier；Then conductor sheath is formed outside high density polyethylene (HDPE) or medium density polyethylene or polrvinyl chloride or Low Density Polyethylene extrusion molding being coated on insulation screen；Above-mentioned steps repeatedly, until forming three conductive units；
Second step: manufacture the step of metal screen layer: take three conductive units two manufactured in the first step biphase circumscribedly stranded or be placed in parallel, conductive unit intertwist body；Take the mode that steel band or aluminium strip or copper strips are in the way of longitudinally cladding or spiral is wrapped again to be close to be coated with outside the conductive unit intertwist body formed in the first step；Longitudinally during cladding, having overlapping overlap joint, lap width is 2～5mm, and lap-joint's PUR bonds, and the peel strength minima between lap-joint's steel band or between aluminium strip or between copper strips is 1.6N/mm；When spiral is wrapped, front and back having overlapping overlap joint between spiral, lap width is 1～3mm；
3rd step: form water blocking layer and the step of tack coat: take water blocking layer and be waterstop or non-woven fabrics or polyester band or aluminium-plastic tape is longitudinally coated on outside the metal screen layer manufactured in second step, form water blocking layer；Take polypropylene extrusion molding to be coated on outside water blocking layer and form tack coat；
4th step: manufacture the step of inner sheath: take polyethylene or polrvinyl chloride extrusion molding is coated with the tack coat outside formation inner sheath manufactured in the third step；
5th step: manufacture the step of armor: take outside the inner sheath that pre-manufactured gasket for packing and reinforcement helical coated manufacture in the 4th step, wherein reinforcement by stiffener, be coated on the plastic layer outside stiffener and constitute, gasket for packing is one group with two and is constituted gasket for packing group, gasket for packing group and reinforcement are alternately distributed outside inner sheath, and gasket for packing group and reinforcement are all close to inner sheath；The material of stiffener is steel wire or fiberglass reinforced plastics or aramid yarn；The material of plastic layer is polypropylene or linear low density polyethylene or Low Density Polyethylene or high density polyethylene (HDPE)；The diameter of gasket for packing is equal with the diameter of reinforcement；
6th step: manufacture the step of oversheath: be coated on outside the armor that the 5th step is formed by oversheath extruding machine by high density polyethylene (HDPE) or medium density polyethylene extrusion molding, form oversheath；
7th step: manufacture the step of oversheath protective layer: take polyamide and be coated in the 6th step outside the oversheath manufactured by its extrusion molding, forms seabed high tension cable finished product, and the thickness of described oversheath protective layer is 1.0～2.0mm.
Seabed high tension cable in embodiment 3 of the present invention, it by the following method step be fabricated by:
The first step: manufacture the step of conductive unit: first take many copper wires or aluminium wire or many copper wires carry out stranded with multiple aluminium wire, forms the conductor of required sectional area；Take organosilane crosslinked polyethylene or by weight again, be made up of following raw material: high density polyethylene (HDPE): 70～85 parts, ethylene-vinyl acetate copolymer: 10～20 parts, ethylene-tetrafluoroethylene copolymer: 8～16 parts, magnesium hydroxide: 10～15 parts, antioxidant 1010: 3～5 parts, strontium titanates: 2～4 parts, calcium titanate: 2～4 parts, bismuth titanates: 2～4 parts, magnesium titanate: 2～4 parts, silicon dioxide: 3～5 parts, zirconium dioxide: 3～5 parts；Put in insulating barrier extruding machine, at the outer plastic extruding insulated layer of conductor, make the center of circle of conductor coincide with the center of circle of insulating barrier, and the diameter of insulating barrier is 1.5～5 times of conductor diameter and thickness of insulating layer minima is 1.5mm；Then insulation screen is formed outside conductive plastics extrusion molding is coated on insulating barrier；Then conductor sheath is formed outside high density polyethylene (HDPE) or medium density polyethylene or polrvinyl chloride or Low Density Polyethylene extrusion molding being coated on insulation screen；Above-mentioned steps repeatedly, until forming three conductive units；
Second step: manufacture the step of metal screen layer: take three conductive units two manufactured in the first step biphase circumscribedly stranded or be placed in parallel, conductive unit intertwist body；Take the mode that steel band or aluminium strip or copper strips are in the way of longitudinally cladding or spiral is wrapped again to be close to be coated with outside the conductive unit intertwist body formed in the first step；Longitudinally during cladding, having overlapping overlap joint, lap width is 2～5mm, and lap-joint's PUR bonds, and the peel strength minima between lap-joint's steel band or between aluminium strip or between copper strips is 1.6N/mm；When spiral is wrapped, front and back having overlapping overlap joint between spiral, lap width is 1～3mm；
3rd step: form water blocking layer and the step of tack coat: take water blocking layer and be waterstop or non-woven fabrics or polyester band or aluminium-plastic tape is longitudinally coated on outside the metal screen layer manufactured in second step, form water blocking layer；Take polypropylene extrusion molding to be coated on outside water blocking layer and form tack coat；
4th step: manufacture the step of inner sheath: take polyethylene or polrvinyl chloride extrusion molding is coated with the tack coat outside formation inner sheath manufactured in the third step；
5th step: manufacture the step of armor: take outside the inner sheath that pre-manufactured gasket for packing and reinforcement helical coated manufacture in the 4th step, wherein reinforcement by stiffener, be coated on the plastic layer outside stiffener and constitute, gasket for packing and reinforcement are alternately distributed outside inner sheath, and gasket for packing and reinforcement are all close to inner sheath；The material of stiffener is steel wire or fiberglass reinforced plastics or aramid yarn；The material of plastic layer is polypropylene or linear low density polyethylene or Low Density Polyethylene or high density polyethylene (HDPE)；The diameter of gasket for packing is equal with the diameter of reinforcement；
6th step: manufacture the step of oversheath: be coated on outside the armor that the 5th step is formed by oversheath extruding machine by high density polyethylene (HDPE) or medium density polyethylene extrusion molding, form oversheath；Complete the manufacture of seabed high tension cable finished product.
Seabed high tension cable in embodiment 4 of the present invention, it by the following method step be fabricated by:
The first step: manufacture the step of conductive unit: first take many copper wires or aluminium wire or many copper wires carry out stranded with multiple aluminium wire, forms the conductor of required sectional area；Take organosilane crosslinked polyethylene or by weight again, be made up of following raw material: high density polyethylene (HDPE): 70～85 parts, ethylene-vinyl acetate copolymer: 10～20 parts, ethylene-tetrafluoroethylene copolymer: 8～16 parts, magnesium hydroxide: 10～15 parts, antioxidant 1010: 3～5 parts, strontium titanates: 2～4 parts, calcium titanate: 2～4 parts, bismuth titanates: 2～4 parts, magnesium titanate: 2～4 parts, silicon dioxide: 3～5 parts, zirconium dioxide: 3～5 parts；Put in insulating barrier extruding machine, at the outer plastic extruding insulated layer of conductor, make the center of circle of conductor coincide with the center of circle of insulating barrier, and the diameter of insulating barrier is 1.5～5 times of conductor diameter and thickness of insulating layer minima is 1.5mm；Then insulation screen is formed outside conductive plastics extrusion molding is coated on insulating barrier；Then conductor sheath is formed outside high density polyethylene (HDPE) or medium density polyethylene or polrvinyl chloride or Low Density Polyethylene extrusion molding being coated on insulation screen；Above-mentioned steps repeatedly, until forming three conductive units；
Second step: manufacture the step of metal screen layer: take three conductive units two manufactured in the first step biphase circumscribedly stranded or be placed in parallel, conductive unit intertwist body；Take the mode that steel band or aluminium strip or copper strips are in the way of longitudinally cladding or spiral is wrapped again to be close to be coated with outside the conductive unit intertwist body formed in the first step；Longitudinally during cladding, having overlapping overlap joint, lap width is 2～5mm, and lap-joint's PUR bonds, and the peel strength minima between lap-joint's steel band or between aluminium strip or between copper strips is 1.6N/mm；When spiral is wrapped, front and back having overlapping overlap joint between spiral, lap width is 1～3mm；
3rd step: form water blocking layer and the step of tack coat: take water blocking layer and be waterstop or non-woven fabrics or polyester band or aluminium-plastic tape is longitudinally coated on outside the metal screen layer manufactured in second step, form water blocking layer；Take polypropylene extrusion molding to be coated on outside water blocking layer and form tack coat；
4th step: manufacture the step of inner sheath: take polyethylene or polrvinyl chloride extrusion molding is coated with the tack coat outside formation inner sheath manufactured in the third step；
5th step: manufacture the step of armor: take outside the inner sheath that pre-manufactured gasket for packing and reinforcement helical coated manufacture in the 4th step, wherein reinforcement by stiffener, be coated on the plastic layer outside stiffener and constitute, gasket for packing is one group with two and is constituted gasket for packing group, gasket for packing group and reinforcement are alternately distributed outside inner sheath, and gasket for packing group and reinforcement are all close to inner sheath；The material of stiffener is steel wire or fiberglass reinforced plastics or aramid yarn；The material of plastic layer is polypropylene or linear low density polyethylene or Low Density Polyethylene or high density polyethylene (HDPE)；The diameter of gasket for packing is equal with the diameter of reinforcement；
6th step: manufacture the step of oversheath: be coated on outside the armor that the 5th step is formed by oversheath extruding machine by high density polyethylene (HDPE) or medium density polyethylene extrusion molding, form oversheath；Complete the manufacture of seabed high tension cable finished product.
In the present invention, due to reinforcement by stiffener, be coated on the plastic layer outside stiffener and constitute, therefore, the size of stiffener can carry out appropriate design according to mechanical property requirements, and its outside plastic layer achieves tangent, the technology of rounding, i.e. armor amount of redundancy can be transferred to properly, coordinates gasket for packing to order and makes resource more save.
In the present invention, oversheath and presumable oversheath protective layer, make product be provided with the anti-wear performance more excellent than prior art, water-impervious, anti-sea water performance.
In the present invention, screen layer is different with of the prior art from the set-up mode of insulating barrier, and in prior art, screen layer is close to conductor, is actually difficulty with the effect of shielding；Therefore, the present invention makes the shielding properties of cable be substantially improved, not only achieve the eliminating of external disturbance, considerably reduce the impact that conductor self radiation is external simultaneously.
In the present invention, owing to have employed special insulating layer material, and suitably thickness proportion and concentricity, the insulating properties making cable are greatly increased, and through test, the present invention is for the electric power of transmission 500～1000KV, 1000 meters, 30,000 hours, any punch-through is not had to occur.
Through applicant's repeated tests, the optimization formula of discovery insulating barrier is: insulating layer material by weight, is made up of following raw material: high density polyethylene (HDPE): 80 parts, ethylene-vinyl acetate copolymer: 15 parts, ethylene-tetrafluoroethylene copolymer: 12 parts, magnesium hydroxide: 13 parts, antioxidant 1010: 4 parts, strontium titanates: 3 parts, calcium titanate: 3 parts, bismuth titanates: 3 parts, magnesium titanate: 3 parts, silicon dioxide: 4 parts, zirconium dioxide: 4 parts.
In the application, insulating barrier is through test, and its major parameter is as follows: melt flows mass rate :≤1.8g/10min；Density≤1.06g/cm3；Hot strength >=21MPa；Break-draw strain >=550%；Resisting environmental stress and cracking F0/h≥130h；Dielectric strength >=75kV/mm；Specific insulation >=5 × 1015ρv/Ω·m；Dielectric strength εr≤2.8。
Optimization formula is through test, and its major parameter is as follows: melt flows mass rate: 1.5g/10min；Density≤1.01g/cm3；Hot strength: 25MPa；Break-draw strains: 580%；Resisting environmental stress and cracking F0/ h:160h；Dielectric strength: 82kV/mm；Specific insulation: 5.9 × 1015ρv/Ω·m；Dielectric strength εr: 2.6.
Above-mentioned parameter ensure that it has excellent insulating properties and extrusion processing performance, enables the cable of the present invention to transmit the electric power of 500～1000KV.
Simply, easily grasp, the production equipment using cable production firm conventional i.e. can produce the cable making method of the present invention, and therefore, equipment investment is few, more economically practical, makes utilization rate of equipment and installations higher.
Therefore, the present invention has a following main beneficial effect: cable machinery performance redundancy amount is more suitable, resource is more saved, more anti-wear performance, more can water-impervious, more anti-sea water, shielding properties more preferably, more can transmit high voltage.
The present invention is not limited to above-mentioned preferred forms, it will be appreciated that the design of the present invention can be implemented to use by other various forms, and they also fall within protection scope of the present invention.

Claims (1)

1. seabed high tension cable, it is characterised in that it is to be made up of the conductive unit set gradually from inside to outside, metal screen layer, water blocking layer, inner sheath, armor, oversheath, oversheath protective layer；Described conductive unit be coated on outside conductor by conductor, extrusion molding insulating barrier, be positioned at the insulation screen outside insulating barrier, conductor sheath that extrusion molding is coated on outside insulation screen is constituted, on arbitrary cross section, the center of circle of conductor coincides with the center of circle of insulating barrier, and the diameter of insulating barrier is 1.5～5 times of conductor diameter and thickness of insulating layer minima is 1.5mm；Described armor is made up of gasket for packing, reinforcement, reinforcement by stiffener, be coated on the plastic layer outside stiffener and constitute, gasket for packing is one group with three and is constituted gasket for packing group, reinforcement is one group with three and is constituted reinforcement group, gasket for packing group and reinforcement group are alternately distributed outside inner sheath, and gasket for packing group and reinforcement group are all close to inner sheath；The material of described oversheath protective layer is polyamide；The material of described insulating barrier is by weight, is made up of following raw material: high density polyethylene (HDPE): 70～85 parts, ethylene-vinyl acetate copolymer: 10～20 parts, ethylene-tetrafluoroethylene copolymer: 8～16 parts, magnesium hydroxide: 10～15 parts, antioxidant 1010: 3～5 parts, strontium titanates: 2～4 parts, calcium titanate: 2～4 parts, bismuth titanates: 2～4 parts, magnesium titanate: 2～4 parts, silicon dioxide: 3～5 parts, zirconium dioxide: 3～5 parts；
The material of described metal screen layer is copper strips, is to be coated on outside conductive unit in the way of longitudinally cladding；
Described water blocking layer is polyester band；Described insulation screen is conductive plastics.
CN201610397078.0A 2014-09-15 2014-09-15 Submarine high-pressure cable good in shielding performance Withdrawn CN105825954A (en)

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