CN101901643A - Bunched frequency conversion submarine cable and manufacturing method thereof - Google Patents
Bunched frequency conversion submarine cable and manufacturing method thereof Download PDFInfo
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- CN101901643A CN101901643A CN2010102448391A CN201010244839A CN101901643A CN 101901643 A CN101901643 A CN 101901643A CN 2010102448391 A CN2010102448391 A CN 2010102448391A CN 201010244839 A CN201010244839 A CN 201010244839A CN 101901643 A CN101901643 A CN 101901643A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Abstract
The invention relates to a bunched frequency conversion submarine cable and a manufacturing method thereof, which legitimately combines a plurality of frequency conversion cable units together and transmits power supplies of different parameters to electric submersible pumps of multiple producing wells on a marine petroleum exploitation platform. The submarine cable comprises frequency conversion cable units, gap filling materials, an armoring cushion layer, a metal armoring layer and a submarine cable outer protective layer, wherein the frequency conversion cable units are twisted into the cable, the gap filling materials are filled among the frequency conversion cable units, the armoring cushion layer is arranged outside the frequency conversion cable units twisted into the cable, the metal armoring layer is arranged outside the armoring cushion layer, and the submarine cable outer protective layer is sheathed outside the metal armoring layer; and each frequency conversion cable unit comprises a power cable core, a control cable core, a gap filler, a metal shield layer and a protective layer, wherein the power cable core comprises a power cable core conductor, a power cable core insulation layer, a semiconductive shield layer and a power cable core metal shield layer, and the control cable core comprises a control cable core conductor, a control cable core insulation layer and a control cable core metal shield layer.
Description
Technical field
What the present invention relates to is a kind of bunched frequency conversion submarine cable and preparation method thereof, be reasonably to combine by a plurality of frequency-changing cables unit, the cable outside adds metal protection layer, transmits the power supply of different parameters for the electric submersible pump of many mouthfuls of producing wells on the marine petroleum exploitation platform.
Background technology
Along with the reinforcement of China's offshore oil exploitation dynamics and the continuous progress of oil exploitation technology, offshore oil exploitation has obtained fast development.On an offshore oil platform, often there are a plurality of electric submersible pumps to work simultaneously, and because the manufacturer and the operational factor difference of each electric submersible pump, also different from the power parameter that the electric submersible pump transformer comes out, and the power parameter of same cable transmission is certain, and this just requires the electric submersible pump power supply of many cables to different parameters.If according to the electric submersible pump controlling schemes of " one to one ", each electric submersible pump all needs a cable power supply, and a plurality of electric submersible pumps on platform just need many submarine cables.The number of sea cable is many more, and the needed oceanic area of laying is big more, and construction times is also many more, and overall cost is also big more, and maintaining is also extremely inconvenient.If comprise the many groups of cables that can carry the different electrical power parameter in the submarine cable, and can control the electric submersible pump of different parameters respectively, just can reduce quantity and every cost of submarine cable.
Summary of the invention
The present invention seeks to deficiency, a kind of bunched frequency conversion submarine cable and preparation method thereof is provided, the frequency conversion sea cable of transmission different frequency parameter is become one, constitute bunched frequency conversion submarine cable at above-mentioned extra large cable demand and present extra large cable product function.This cable can be finished to the electric submersible pump of different electrical power parameter and power simultaneously.
Bunched frequency conversion submarine cable and preparation method thereof is to take following scheme to realize:
Bunched frequency conversion submarine cable comprises frequency-changing cable unit, gap filling material, armouring bed course, metal armouring layer, extra large cable outer jacket.
The frequency-changing cable unit is a relatively independent frequency-changing cable, and it is 2～10 groups that the frequency-changing cable unit is provided with number.Several stranded strandings in frequency-changing cable unit are filled with gap filling material between several frequency-changing cable unit, and gap filling material is the good rope form filler of seawater corrosion resistance and flexibility.There is the armouring bed course several outsides, frequency-changing cable unit at stranded stranding, and the armouring bed course is extrusion plastic bed course or sea water resistance reinforcing fiber bundles.The metal armouring layer is arranged outside the armouring bed course, and the metal armouring layer is the zinc-coated wire or the zinc-aluminum-magnesium alloy layer steel wire of seawater corrosion resistance.The metal armouring layer is extruded with extra large cable outer jacket outward, and extra large cable outer jacket is the mixture of extrusion plastic sheath or sea water resistance reinforcing fiber bundles and anti-corrosion asphalt.
Each frequency-changing cable unit of bunched frequency conversion submarine cable comprises power line core, control core, gap filler, metal screen layer, sheath.The power core is twisted into cable with the control core, and gapped filler between power core and control core has metal screen layer in the power core and the control core outside of stranded stranding, is extruded with sheath outside metal screen layer.Described power core core number is 3 cores.Control core core number is 2～8 cores.The gap filler is the non-hygroscopic compound.Metal screen layer can be knit wire, also can be copper belt, brass band, zinc-plated copper strips, the plumbous cover of alloy, compound copper-plastics band and aluminium-plastic tape etc.Sheath is insulation, water proof type plastics/elastomer oversheath.
The power core is made up of power line core conductor, power line core insulation layer, semiconductive shielding layer and power line core metal screen.Outside the power line core conductor, be extruded with power line core insulation layer, outside power line core insulation layer, semiconductive shielding layer arranged, dynamic core metal screen layer outside semiconductive shielding layer.Described power line core conductor material is copper, aluminium and alloy thereof.Insulating barrier can be crosslinked polyethylene, vinyon, also can be rubber type of material.Semiconductive shielding layer is a crosslinkable shielding material, and for rated voltage 1kV and following low-voltage cable, this structure can be omitted.Power line core metal screen can be knit wire, also can be copper belt, brass band, zinc-plated copper strips, the plumbous cover of alloy, compound copper-plastics band and aluminium-plastic tape etc.
The control core is made up of control line core conductor, control line core insulation layer and control line core metal screen.Control line core conductor material is a copper.Control line core insulation layer can be crosslinked polyethylene, polyacetylene plastics, also can be rubber type of material.Control line core metal screen can be knit wire, also can be copper belt, brass band, zinc-plated copper strips, compound copper-plastics band and aluminium-plastic tape etc.
The bunched frequency conversion submarine cable manufacture method:
1, the making of power core
(1) the power line core conductor is made: conductive wire is twisted into conductor on stranding machine, the coefficient that presses of compact conductor is controlled between 0.88～0.91, and the outer lay ratio of conductor is 9～13 times.The conductor diameter tolerance is ± 0.2mm.
(2) power line core insulation layer and nonmetal screen are made:
Rated voltage 3kV and following cable (Φ 65 extruders or Φ 90 extruders) on insulating exruded machine are finished extruding of power line core insulation layer, adopt polyethylene layer, the expressing technique temperature is 100 ℃～160 ℃, and polyethylene layer adopts normal-temperature water to cool off.
Rated voltage 3kV and above cable, conductor is outer should conductor screen, the outer extruded insulation layer of conductor screen, insulating barrier extrudes semiconductive shielding layer outward.Conductor screen, insulation and insulation shielding should adopt three-layer co-extruded mode to make, adopt three shared extruder heads of plastic extruding machine to extrude simultaneously for three layers, wherein conductor screen and insulation shielding adopt semiconductive material, conductor screen and insulation shielding expressing technique temperature are 70 ℃～110 ℃, between conductor shield and insulation screen, insulating barrier is arranged, insulating barrier adopts crosslinked polyetylene insulated layer, and the expressing technique temperature of insulating barrier is 90 ℃～120 ℃, and the extrusion temperature deviation is no more than ± and 5 ℃.Enter the baking pipe and vulcanize after conductor shield, insulating barrier and insulation screen are extruded, baking Guan Ge district sulfuration process temperature range is 380 ℃～260 ℃, temperature deviation is no more than ± and 10 ℃.Behind the baking, adopt normal-temperature water to cool off;
The above-mentioned power core that is extruded with insulating barrier and nonmetal screen adopts torque motor to carry out take-up, to be extruded with the power core rolling of insulating barrier and nonmetal screen on cable hank, winding diameter is not less than 20 times of power line core diameters, and takeup tension is not more than 70N/mm
2Power core external diameter is no more than regulation nominal outside diameter ± 0.5mm.Described semiconductive material adopts the crosslinkable semiconductive material, and its Main Ingredients and Appearance is EVA rubber and conductive carbon black.
(3) power line core metal screen is made: power line core metal screen is finished on the metallic shield machine.Power line core metal band shielding thickness is 0.09～0.12mm, and individual layer is overlapping wrapped, and wrapped average overlapping rate is not less than 15% of bandwidth.Metal knitted shielding is that (diameter 0.2～0.5mm) forward and reverse braiding forms many fine wires, and percentage of braiding coverage is not less than 80%.
Described metallic shield machine adopts concentric type copper strips shield machine or metal knitted machine.
2, the manufacture method of control core
(1) the control line core conductor is made: as no specific (special) requirements, the control line core conductor adopts the soft circular copper wire of real core, also can adopt stranded conductor and the flexible conductor produced as operation 1 (1).The soft circular copper wire of real core is drawn through rational apolegamy wire drawing die through continuous annealing high speed big drawing machine by the copper bar and forms.Wire drawing die finishing die diameter is bigger by 1%～1.5% than finished product single line, and pull wire speed is 12.0 ± 0.5m/s, and annealing voltage is 45～50V.The wire drawing oil concentration is controlled at 8%～10%, and cooling fluid concentration is 0.5～1%, and coolant temperature is no more than 60 ℃.Described wire drawing oil is base oil with the low-viscosity oil, and it is formulated to add modified vegetable oil, soap part etc., can be mixed with electric wire with the water of different hardness, cable industry draws lubricated, the cooling fluid that copper cash is used.
(2) control line core insulation layer is made: (Φ 45 extruders or Φ 65 extruders) finish extruding of control line core insulation layer on insulating exruded machine, and extrusion temperature is set according to the material difference, and the core insulating barrier adopts normal-temperature water to cool off.The expressing technique temperature is 110 ℃～180 ℃ of platforms, the extrusion temperature deviation is no more than ± and 5 ℃.The insulated wire cores take-up adopts moment electric power to carry out take-up, and takeup tension is not more than 70N/mm
2The core external diameter is no more than regulation nominal outside diameter ± 0.5mm.
(3) control line core metal screen is made: control line core metal screen is finished on metallic shield machine (concentric type copper strips shield machine or metal knitted machine).Control line core metal band shielding thickness is 0.09～0.12mm, and individual layer is overlapping wrapped, and wrapped average overlapping rate is not less than 15% of bandwidth.Metal knitted shielding is that (diameter 0.15～0.4mm) forward and reverse braiding forms many fine wires, and percentage of braiding coverage is not less than 80%.
3, frequency-changing cable unit 1 makes:
After power core and control core complete, carry out the making of frequency-changing cable unit.This operation is stranded finishing on cabler, and power core and control core are twisted into the frequency-changing cable unit on cabler, and the laying up pitch ratio is no more than 30 times of outside diameters of cable, and the stranding direction is a left-hand.Rounding is filled with the non-hygroscopic compound in the stranding gap, and with overlapping wrapped the tightening of band, the band Duplication is not less than 10%.The outside with metal tape overlapping wrapped on cable core as metal screen layer, the metal tape Duplication is not less than 10%.Wherein the power core is 3 cores, and the control core respectively is 2～8 cores.
After the converter unit stranding is finished, utilize plastic extruder to extrude one deck waterproof sheath in its outside.Extruder is respectively distinguished extrusion temperature: 150 ± 10 ℃ of charging apertures, 170 ± 10 ℃ in machine barrel one district, 180 ± 10 ℃ in machine barrel two districts, 190 ± 10 ℃ in machine barrel three districts, 200 ± 10 ℃ in machine barrel four districts, 200 ± 10 ℃ on machine neck, 230 ± 10 ℃ of die orifices.The segmentation cooling is adopted in cooling, and the first segment tank adopts warm water, and chilling temperature is 50 ± 5 ℃, and all the other are the normal-temperature water cooling.
4, comprehensive stranding and armouring manufacture craft:
Once property is finished stranding, the wire armoring of frequency-changing cable unit, the making of extra large cable outer jacket on large-scale cabler wire armoring machine.
(1) stranding: several frequency-changing cable unit are positioned on the cable hank, cable hank is installed on the large-scale vertical cabler, adjust each laying tension to basically identical, laying tension is controlled at 40～50N/mm
2Set laying up pitch and stranding direction, the laying up pitch ratio is no more than 30 times of laying up diameter, and the stranding direction is a left-hand, with several frequency-changing cable unit 1 stranded strandings.
(2) wire armoring: after operation 4 (1) is finished, immediately outside it in wrapped one deck of surface helix, low intensive zinc-coated wire is as the armature of cable layer.The pitch ratio of steel wire is no more than 15 times of armouring external diameters, and the armouring direction is a left-hand.
(3) extra large cable outer jacket: extra large cable outer sheath material is the plastics synthetic fibers.After operation 4 (2) wire armorings were finished, at its forward and reverse wrapped two layers of plastic synthetic fibers in outside, wherein the internal layer direction was a dextrad immediately, and skin is a left-hand.The radical of synthetic fibers and diameter are selected according to the external diameter size of cable, are as the criterion with complete covering wire armoring layer.Loose for preventing fibrage, in wrapped, the cable pitch prill of heating is poured in the gap of plastics synthetic fibers, the pitch melt temperature is 170 ℃ ± 10 ℃.Behind the pitch casting complete, should cool off with cold water immediately, water temperature is no more than 50 ℃, makes bunched frequency conversion submarine cable.
Submarine cable of the present invention, electric pressure are 1～6kV, and frequency-changing cable unit number is 2～10, and each unit contains 3 power cores and 2～8 control cores.Bunched cable has the wire armoring layer of defencive function outward, is beneficial to the laying installation and the maintenance of cable, prevents various damage of external force, guarantees the normal operation of cable.
The present invention takes following scheme to realize correlation technique:
For each frequency-changing cable unit, make frequency-changing cable unit earlier by three core frequency-changing cable structures with anti-electromagnetic interference function, contain 3 power cores and 2～8 control cores in each unit.And then each frequency-changing cable unit is twisted into the bunched cable cable core on the extra large cable cabler of special use, outside the bunched cable cable core, increase the various protective layers that wire armoring etc. is suitable for the seabed operation again.The cross-sectional area of conductor of each converter unit is determined by the capacity of its corresponding electric submersible pump.During this programme relates to, the production technology and the tooling device of low-voltage variable frequency cable and submarine cable.
The invention has the beneficial effects as follows: each converter unit in the bunched frequency conversion submarine cable can be powered and controls respectively to the seabed of different Control Parameter electric submersible pump.Not only realized the stability of power supply and control, and realized that a submarine cable can satisfy the seabed electric submersible pump operate as normal of many different Control Parameter simultaneously.Not only reduce number of cables, and saved large-area cable laying marine site and laid down cost.Because the metal screen layer of opposing electromagnetic interference function is all arranged in each frequency-changing cable unit, therefore, bunched frequency conversion submarine cable opposing electromagnetic interference performance of the present invention is good.
Description of drawings
The invention will be further described below with reference to accompanying drawing.
Fig. 1 is the bunched frequency conversion submarine cable structural representation.
Fig. 2 is the structural representation of each frequency-changing cable unit of bunched frequency conversion submarine cable.
Fig. 3 is each frequency-changing cable unit medium power core structural representation of bunched frequency conversion submarine cable.
Fig. 4 is a control line cored structure schematic diagram in each frequency-changing cable unit of bunched frequency conversion submarine cable.
Embodiment
With reference to accompanying drawing 1～4, in Fig. 1, bunched frequency conversion submarine cable comprises frequency-changing cable unit 1, gap filling material 2, armouring bed course 3, metal armouring layer 4, extra large cable outer jacket 5.
Frequency-changing cable unit 1 is a relatively independent frequency-changing cable, and detailed structure sees that Fig. 2 describes, and frequency-changing cable unit 1 is provided with 2～10.Several frequency-changing cable unit 1 stranded strandings are filled with gap filling material 2 between several frequency-changing cable unit 1, and gap filling material 2 is the good rope form filler of seawater corrosion resistance and flexibility.There is armouring bed course 3 several 1 outsides, frequency-changing cable unit at stranded stranding, and armouring bed course 3 is extrusion plastic bed course or sea water resistance reinforcing fiber bundles.Metal armouring layer 4 is arranged outside armouring bed course 3, and metal armouring layer 4 is the zinc-coated wire or the zinc-aluminum-magnesium alloy layer steel wire of seawater corrosion resistance.Be extruded with extra large cable outer jacket 5 outside the metal armouring layer 4, extra large cable outer jacket 5 is the mixture of extrusion plastic sheath or sea water resistance reinforcing fiber bundles and anti-corrosion asphalt.
In Fig. 2, each frequency-changing cable unit of bunched frequency conversion submarine cable comprises power line core 1-1, control core 1-2, gap filler 1-3, metal screen layer 1-4, sheath 1-5.Power core 1-1 and the stranded stranding of control core 1-2, gapped filler 1-3 between power core 1-1 and control core 1-2, power core 1-1 at stranded stranding has metal screen layer 1-4 with control core 1-2 outside, is extruded with sheath 1-5 outside metal screen layer 1-4.Described power core 1-1 core number is 3 cores, and detailed structure sees that Fig. 3 describes.Control core 1-2 core number is the 2-8 core, and detailed structure sees that Fig. 4 describes.Gap filler 1-3 is the non-hygroscopic compound, can adopt polypropylene expanded inserts.Metal screen layer 1-4 can be knit wire, also can be copper belt, brass band, zinc-plated copper strips, the plumbous cover of alloy, compound copper-plastics band and aluminium-plastic tape etc.Sheath 1-5 is insulation, water proof type plastics/elastomer oversheath.Contain 3 power cores and 2～8 control cores in described each frequency-changing cable unit 1.
In Fig. 3, the power core is made up of power line core conductor 1-1-1, power line core insulation layer 1-1-2, semiconductive shielding layer 1-1-3 and power line core metal screen 1-1-4.Outside power line core conductor 1-1-1, be extruded with power line core insulation layer 1-1-2, outside power line core insulation layer 1-1-2, semiconductive shielding layer 1-1-3 arranged, dynamic core metal screen layer 1-1-4 outside semiconductive shielding layer 1-1-3.Described power line core conductor 1-1-1 material is copper, aluminium and alloy thereof.Power line core insulation layer 1-1-2 can be crosslinked polyethylene, vinyon, also can be rubber type of material.Semiconductive shielding layer is a crosslinkable shielding material, and for rated voltage 1kV and following low-voltage cable, this structure can be omitted.Power line core metal screen 1-1-4 can be knit wire, also can be copper belt, brass band, zinc-plated copper strips, the plumbous cover of alloy, compound copper-plastics band and aluminium-plastic tape etc.
In Fig. 4, the control core is made up of control line core conductor 1-2-1, control line core insulation layer 1-2-2 and control line core metal screen 1-2-3.Control line core conductor 1-2-1 material is a copper.Control line core insulation layer 1-2-2 can be crosslinked polyethylene, vinyon, also can be rubber type of material.Control line core metal screen 1-2-3 can be knit wire, also can be copper belt, brass band, zinc-plated copper strips, compound copper-plastics band and aluminium-plastic tape etc.
The bunched frequency conversion submarine cable manufacture method:
1, the making of power core
(1) the power line core conductor is made: conductive wire is twisted into conductor on stranding machine, the coefficient that presses of compact conductor is controlled between 0.88～0.91, and the outer lay ratio of conductor is 9～13 times.The conductor diameter tolerance is ± 0.2mm.
(2) power line core insulation layer and nonmetal screen are made:
Rated voltage 3kV and following cable (Φ 65 extruders or Φ 90 extruders) on insulating exruded machine are finished extruding of power line core insulation layer, adopt polyethylene layer, the expressing technique temperature is 100 ℃～160 ℃, and polyethylene layer adopts normal-temperature water to cool off.
Rated voltage 3kV and above cable, conductor is outer should conductor screen, the outer extruded insulation layer of conductor screen, insulating barrier extrudes semiconductive shielding layer outward.Conductor screen, insulation and insulation shielding should adopt three-layer co-extruded mode to make, adopt three shared extruder heads of plastic extruding machine to extrude simultaneously for three layers, wherein conductor screen and insulation shielding adopt semiconductive material, conductor screen and insulation shielding expressing technique temperature are 70 ℃～110 ℃, between conductor shield and insulation screen, insulating barrier is arranged, insulating barrier adopts crosslinked polyetylene insulated layer, and the expressing technique temperature of insulating barrier is 90 ℃～120 ℃, and the extrusion temperature deviation is no more than ± and 5 ℃.Enter the baking pipe and vulcanize after conductor shield, insulating barrier and insulation screen are extruded, baking Guan Ge district sulfuration process temperature range is 380 ℃～260 ℃, temperature deviation is no more than ± and 10 ℃.Behind the baking, adopt normal-temperature water to cool off;
The above-mentioned power core that is extruded with insulating barrier and nonmetal screen adopts torque motor to carry out take-up, to be extruded with the power core rolling of insulating barrier and nonmetal screen on cable hank, winding diameter is not less than 20 times of power line core diameters, and takeup tension is not more than 70N/mm
2Power core external diameter is no more than regulation nominal outside diameter ± 0.5mm.Described semiconductive material adopts commercially available crosslinkable semiconductive material, and its Main Ingredients and Appearance is EVA rubber and conductive carbon black.
(3) power line core metal screen is made: power line core metal screen is finished on the metallic shield machine.Power line core metal band shielding thickness is 0.09～0.12mm, and individual layer is overlapping wrapped, and wrapped average overlapping rate is not less than 15% of bandwidth.Metal knitted shielding is many fine wires, and diameter is 0.2～0.5mm, and forward and reverse braiding forms, and percentage of braiding coverage is not less than 80%.
Described metallic shield machine adopts concentric type copper strips shield machine or metal knitted machine.
2, the manufacture method of control core
(1) the control line core conductor is made: as no specific (special) requirements, the control line core conductor adopts the soft circular copper wire of real core, also can adopt stranded conductor and the flexible conductor produced as operation 1 (1).The soft circular copper wire of real core is drawn through rational apolegamy wire drawing die through continuous annealing high speed big drawing machine by the copper bar and forms.Wire drawing die finishing die diameter is bigger by 1%～1.5% than finished product single line, and pull wire speed is 12.0 ± 0.5m/s, and annealing voltage is 45～50V.The wire drawing oil concentration is controlled at 8%～10%, and cooling fluid concentration is 0.5～1%, and coolant temperature is no more than 60 ℃.Described wire drawing oil adopts commercially available wire drawing oil, is base oil with the low-viscosity oil, and it is formulated to add modified vegetable oil, soap part etc., can be mixed with electric wire with the water of different hardness, cable industry draws lubricated, the cooling fluid that copper cash is used.
(2) control line core insulation layer is made: (Φ 45 extruders or Φ 65 extruders) finish extruding of control line core insulation layer on insulating exruded machine, and extrusion temperature is set according to the material difference, and the core insulating barrier adopts normal-temperature water to cool off.The expressing technique temperature is 110 ℃～180 ℃ of platforms, the extrusion temperature deviation is no more than ± and 5 ℃.The insulated wire cores take-up adopts moment electric power to carry out take-up, and takeup tension is not more than 70N/mm
2The core external diameter is no more than regulation nominal outside diameter ± 0.5mm.
(3) control line core metal screen is made: control line core metal screen is finished on metallic shield machine (concentric type copper strips shield machine or metal knitted machine).Control line core metal band shielding thickness is 0.09～0.12mm, and individual layer is overlapping wrapped, and wrapped average overlapping rate is not less than 15% of bandwidth.Metal knitted shielding is many fine wires, and diameter is 0.15～0.4mm, and forward and reverse braiding forms, and percentage of braiding coverage is not less than 80%.
3, frequency-changing cable unit 1 makes:
After power core and control core complete, carry out the making of frequency-changing cable unit.This operation is stranded finishing on cabler, and power core and control core are twisted into the frequency-changing cable unit on cabler, and the laying up pitch ratio is no more than 30 times of outside diameters of cable, and the stranding direction is a left-hand.Rounding is filled with the non-hygroscopic compound in the stranding gap, can adopt polypropylene expanded inserts, and with overlapping wrapped the tightening of band, the band Duplication is not less than 10%.The outside with metal tape overlapping wrapped on cable core as metal screen layer, the metal tape Duplication is not less than 10%.Wherein the power core is 3 cores, and the control core respectively is 2～8 cores.Described stranding gap is filled and is selected polypropylene expanded inserts for use with the non-hygroscopic compound.
After the converter unit stranding is finished, utilize plastic extruder to extrude one deck waterproof sheath in its outside.Extruder is respectively distinguished extrusion temperature: 150 ± 10 ℃ of charging apertures, 170 ± 10 ℃ in machine barrel one district, 180 ± 10 ℃ in machine barrel two districts, 190 ± 10 ℃ in machine barrel three districts, 200 ± 10 ℃ in machine barrel four districts, 200 ± 10 ℃ on machine neck, 230 ± 10 ℃ of die orifices.The segmentation cooling is adopted in cooling, and the first segment tank adopts warm water, and chilling temperature is 50 ± 5 ℃, and all the other are the normal-temperature water cooling.
4, comprehensive stranding and armouring manufacture craft:
Once property is finished stranding, the wire armoring of frequency-changing cable unit, the making of extra large cable outer jacket on large-scale cabler wire armoring machine.
(1) stranding: several frequency-changing cable unit are positioned on the cable hank, cable hank is installed on the large-scale vertical cabler, adjust each laying tension to basically identical, laying tension is controlled at 40～50N/mm
2Set laying up pitch and stranding direction, the laying up pitch ratio is no more than 30 times of laying up diameter, and the stranding direction is a left-hand, with several frequency-changing cable unit 1 stranded strandings.
(2) wire armoring: after operation 4 (1) is finished, immediately outside it in wrapped one deck of surface helix, low intensive zinc-coated wire is as the armature of cable layer.The pitch ratio of steel wire is no more than 15 times of armouring external diameters, and the armouring direction is a left-hand.
(3) extra large cable outer jacket: extra large cable outer sheath material is the plastics synthetic fibers.After operation 4 (2) wire armorings were finished, at its forward and reverse wrapped two layers of plastic synthetic fibers in outside, wherein the internal layer direction was a dextrad immediately, and skin is a left-hand.The radical of synthetic fibers and diameter are selected according to the external diameter size of cable, are as the criterion with complete covering wire armoring layer.Loose for preventing fibrage, in wrapped, the cable pitch prill of heating is poured in the gap of plastics synthetic fibers, the pitch melt temperature is 170 ℃ ± 10 ℃.Behind the pitch casting complete, should cool off with cold water immediately, water temperature is no more than 50 ℃, makes bunched frequency conversion submarine cable.
Claims (10)
1. a bunched frequency conversion submarine cable is characterized in that comprising frequency-changing cable unit, gap filling material, armouring bed course, metal armouring layer and extra large cable outer jacket; Several stranded strandings in frequency-changing cable unit, be filled with gap filling material between several frequency-changing cable unit, there is the armouring bed course several outsides, frequency-changing cable unit at stranded stranding, and the metal armouring layer is arranged outside the armouring bed course, and the metal armouring layer is extruded with extra large cable outer jacket outward;
The frequency-changing cable unit is a relatively independent frequency-changing cable, each frequency-changing cable unit of bunched frequency conversion submarine cable comprises power line core, control core, gap filler, metal screen layer and sheath, the power core is twisted into cable with the control core, gapped filler between power core and control core, power core at stranded stranding has metal screen layer with control core outside, is extruded with sheath outside metal screen layer;
The power core is made up of power line core conductor, power line core insulation layer, semiconductive shielding layer and power line core metal screen, outside the power line core conductor, be extruded with power line core insulation layer, outside power line core insulation layer, semiconductive shielding layer is arranged, dynamic core metal screen layer outside semiconductive shielding layer;
The control core is made up of control line core conductor, control line core insulation layer and control line core metal screen, is extruded with control line core insulation layer outside the control line core conductor, and control line core metal screen is arranged outside control line core insulation layer.
2. bunched frequency conversion submarine cable according to claim 1 is characterized in that described frequency-changing cable unit is provided with 2～10.
3. bunched frequency conversion submarine cable according to claim 1 is characterized in that described gap filling material is the good rope form filler of seawater corrosion resistance and flexibility.
4. bunched frequency conversion submarine cable according to claim 1 is characterized in that described armouring bed course is extrusion plastic bed course or sea water resistance reinforcing fiber bundles.
5. bunched frequency conversion submarine cable according to claim 1 is characterized in that zinc-coated wire or zinc-aluminum-magnesium alloy layer steel wire that described metal armouring layer is a seawater corrosion resistance.
6. bunched frequency conversion submarine cable according to claim 1 is characterized in that the mixture that described extra large cable outer jacket is extrusion plastic sheath or sea water resistance reinforcing fiber bundles and anti-corrosion asphalt.
7. bunched frequency conversion submarine cable according to claim 1 is characterized in that containing in described each frequency-changing cable unit 3 power cores and 2～8 control cores.
8. the described bunched frequency conversion submarine cable manufacture method of claim 1 is characterized in that
One, the making of power core
(1) the power line core conductor is made: conductive wire is twisted into conductor on stranding machine, the coefficient that presses of compact conductor is controlled between 0.88～0.91, and the outer lay ratio of conductor is 9～13 times, and the conductor diameter tolerance is ± 0.2mm;
(2) power line core insulation layer and nonmetal screen are made:
Rated voltage 3kV and following cable are finished extruding of power line core insulation layer on insulating exruded machine, adopt polyethylene layer, and the expressing technique temperature is 100 ℃～160 ℃, and polyethylene layer adopts normal-temperature water to cool off;
Rated voltage 3kV and above cable, conductor is outer should conductor screen, the outer extruded insulation layer of conductor screen, insulating barrier extrudes semiconductive shielding layer outward.Conductor screen, insulation and insulation shielding should adopt three-layer co-extruded mode to make, adopt three shared extruder heads of plastic extruding machine to extrude simultaneously for three layers, wherein conductor screen and insulation shielding adopt semiconductive material, conductor screen and insulation shielding expressing technique temperature are 70 ℃～110 ℃, between conductor shield and insulation screen, insulating barrier is arranged, insulating barrier adopts crosslinked polyetylene insulated layer, the expressing technique temperature of insulating barrier is 90 ℃～120 ℃, the extrusion temperature deviation is no more than ± and 5 ℃, at conductor shield, entering the baking pipe after insulating barrier and insulation screen are extruded vulcanizes, baking Guan Ge district sulfuration process temperature range is 380 ℃～260 ℃, temperature deviation is no more than ± and 10 ℃, behind the baking, adopt normal-temperature water to cool off;
The above-mentioned power core that is extruded with insulating barrier and nonmetal screen adopts torque motor to carry out take-up, to be extruded with the power core rolling of insulating barrier and nonmetal screen on cable hank, winding diameter is not less than 20 times of power line core diameters, and takeup tension is not more than 70N/mm
2
(3) power line core metal screen is made: power line core metal screen is finished on the metallic shield machine, power line core metal band shielding thickness is 0.09～0.12mm, individual layer is overlapping wrapped, wrapped average overlapping rate is not less than 15% of bandwidth, metal knitted shielding is many fine wires, and diameter is 0.2～0.5mm, and forward and reverse braiding forms, percentage of braiding coverage is not less than 80%, makes the power core;
Two, the manufacture method of control core
(1) the control line core conductor is made: the control line core conductor adopts the soft circular copper wire of real core, or employing is as the stranded conductor and the flexible conductor of operation 1 (1) production, the soft circular copper wire of real core is drawn through wire drawing die through continuous annealing high speed big drawing machine by the copper bar and forms, wire drawing die finishing die diameter is bigger by 1%～1.5% than finished product single line, pull wire speed is 12.0 ± 0.5m/s, and annealing voltage is 45～50V;
(2) control line core insulation layer is made: finish extruding of control line core insulation layer on insulating exruded machine, extrusion temperature is set according to the material difference, the core insulating barrier adopts normal-temperature water to cool off, the expressing technique temperature is 110 ℃～180 ℃ of platforms, the extrusion temperature deviation is no more than ± and 5 ℃, the insulated wire cores take-up adopts moment electric power to carry out take-up, and takeup tension is not more than 70N/mm
2
(3) control line core metal screen is made: control line core metal screen is finished on the metallic shield machine, control line core metal band shielding thickness is 0.09～0.12mm, individual layer is overlapping wrapped, wrapped average overlapping rate is not less than 15% of bandwidth, metal knitted shielding is many fine wires, diameter is 0.15～0.4mm, and forward and reverse braiding forms, and percentage of braiding coverage is not less than 80%;
Three, the frequency-changing cable unit makes:
After power core and control core complete, carry out the making of frequency-changing cable unit, this operation is stranded finishing on cabler, power core and control core are twisted into the frequency-changing cable unit on cabler, the laying up pitch ratio is no more than 30 times of outside diameters of cable, the stranding direction is a left-hand, rounding is filled with the non-hygroscopic compound in the stranding gap, and with overlapping wrapped the tightening of band, the band Duplication is not less than 10%, the outside with metal tape overlapping wrapped on cable core as metal screen layer, the metal tape Duplication is not less than 10%, wherein the power core is 3 cores, and the control core respectively is 2～8 cores;
After the converter unit stranding is finished, utilize plastic extruder to extrude one deck waterproof sheath in its outside, extruder is respectively distinguished extrusion temperature: 150 ± 10 ℃ of charging apertures, 170 ± 10 ℃ in machine barrel one district, 180 ± 10 ℃ in machine barrel two districts, 190 ± 10 ℃ in machine barrel three districts, 200 ± 10 ℃ in machine barrel four districts, 200 ± 10 ℃ on machine neck, 230 ± 10 ℃ of die orifices, the segmentation cooling is adopted in cooling, the first segment tank adopts warm water, chilling temperature is 50 ± 5 ℃, and all the other are the normal-temperature water cooling;
Four, comprehensive stranding and armouring manufacture craft:
Once property is finished stranding, the wire armoring of frequency-changing cable unit, the making of extra large cable outer jacket on large-scale cabler, wire armoring machine,
(1) stranding: several frequency-changing cable unit are positioned on the cable hank, cable hank is installed on the large-scale vertical cabler, adjust each laying tension to basically identical, laying tension is controlled at 40～50N/mm
2, set laying up pitch and stranding direction, the laying up pitch ratio is no more than 30 times of laying up diameter, and the stranding direction is a left-hand, with several frequency-changing cable unit 1 stranded strandings;
(2) wire armoring: after operation 4 (1) is finished, immediately outside it in wrapped one deck of surface helix, low intensive zinc-coated wire is as the armature of cable layer, the pitch of steel wire ratio is no more than 15 times of armouring external diameters, the armouring direction is a left-hand;
(3) extra large cable outer jacket: extra large cable outer sheath material is the plastics synthetic fibers, after operation 4 (2) wire armorings are finished, immediately at its forward and reverse wrapped two layers of plastic synthetic fibers in outside, wherein the internal layer direction is a dextrad, skin is a left-hand, be as the criterion with complete covering wire armoring layer, loose for preventing fibrage, in wrapped, the cable pitch prill of heating is poured in the gap of plastics synthetic fibers, the pitch melt temperature is 170 ℃ ± 10 ℃, behind the pitch casting complete, should cool off with cold water immediately, water temperature is no more than 50 ℃, makes bunched frequency conversion submarine cable.
9. bunched frequency conversion submarine cable manufacture method according to claim 2 is characterized in that described metallic shield machine adopts concentric type copper strips shield machine or metal knitted machine.
10. bunched frequency conversion submarine cable manufacture method according to claim 2 is characterized in that described stranding gap is filled to select polypropylene expanded inserts for use with the non-hygroscopic compound.
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Effective date of registration: 20160328 Address after: 226010 Nantong Province Economic and Technological Development Zone, the New South Road, No. 1, No. Patentee after: ZHONGTIAN TECHNOLOGIES SUBMARINE CABLE Co.,Ltd. Patentee after: Zhongtian Technology Equipment Cable Co., Ltd. Patentee after: Zhongtian Science and Technology Co., Ltd., Jiangsu Address before: 226010 Nantong Province Economic and Technological Development Zone, the New South Road, No. 1, No. Patentee before: ZHONGTIAN TECHNOLOGIES SUBMARINE CABLE Co.,Ltd. |
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Address after: 226010 No. 1 South Road, Nantong economic and Technological Development Zone, Jiangsu, China Patentee after: Zhongtian Technology submarine cable Co.,Ltd. Address before: 226010 No. 1 South Road, Nantong economic and Technological Development Zone, Jiangsu, China Patentee before: ZHONGTIAN TECHNOLOGIES SUBMARINE CABLE Co.,Ltd. |
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Denomination of invention: Bunched frequency conversion submarine cable and its manufacturing method Effective date of registration: 20220613 Granted publication date: 20120613 Pledgee: Rudong sub branch of Bank of China Ltd. Pledgor: Zhongtian Technology submarine cable Co.,Ltd. Registration number: Y2022320000270 |
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