CN110322989B - Dual-purpose submarine double-three-core cable for communication and power and manufacturing method thereof - Google Patents
Dual-purpose submarine double-three-core cable for communication and power and manufacturing method thereof Download PDFInfo
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- CN110322989B CN110322989B CN201910586197.4A CN201910586197A CN110322989B CN 110322989 B CN110322989 B CN 110322989B CN 201910586197 A CN201910586197 A CN 201910586197A CN 110322989 B CN110322989 B CN 110322989B
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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
- H01B11/10—Screens specially adapted for reducing interference from external sources
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/22—Cables including at least one electrical conductor together with optical fibres
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/0016—Apparatus or processes specially adapted for manufacturing conductors or cables for heat treatment
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- H—ELECTRICITY
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/0026—Apparatus for manufacturing conducting or semi-conducting layers, e.g. deposition of metal
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/012—Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing wire harnesses
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0009—Details relating to the conductive cores
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/14—Submarine cables
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- H—ELECTRICITY
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1895—Internal space filling-up means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- 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
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- H—ELECTRICITY
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- 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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Abstract
The invention discloses a dual-purpose submarine double-three-core cable for communication and power and a manufacturing method thereof, wherein the submarine cable is of a three-core cable structure integrally and consists of three core tubes which are separately sheathed and an outer-layer protective sleeve which is sheathed on the core tubes, the outer diameter of the submarine cable is 265-270 mm, a cylindrical core body with the diameter phi of 38.2-phi of 38.8mm is arranged, and the outer surface of the core body is wrapped with a PVC-made electrostatic coating film; each core pipe is provided with a core body, an electrostatic coating film, an insulating layer, a single-core self-fixing water-blocking tape and a single-core sheath layer from inside to outside; the outer layer protective sleeve is provided with a lining self-fixing water-blocking tape, a lining layer, a steel wire armor layer, an outer lining self-fixing water-blocking tape and an outer lining layer from inside to outside; and a fixing strip is filled in the gap between each core pipe and the outer layer protective sleeve. The submarine cable has dual purposes of communication and power, self-reinforcement in seawater, high strength, good toughness, breakdown resistance, self-shielding property, water resistance, bending resistance, long service life and impact and vibration resistance.
Description
Technical Field
The invention relates to the field of special cable manufacturing, in particular to a dual-purpose submarine dual-three-core cable for communication and power and a manufacturing method thereof.
Background
Submarine cables are divided into submarine communication cables and submarine power cables. Submarine communication cables are mainly used for communication services, are expensive, and have high confidentiality. The submarine power cable is mainly used for transmitting high-power electric energy underwater, has the same effect as an underground power cable, and is different from the submarine power cable in application occasions and laying modes. Submarine cables are wires or optical fibers wrapped with insulating materials and laid under the sea floor and river water for power or signal transmission.
However, the submarine cables in the prior art are all power transmission or communication cables with independent functions, and have long production period, high manufacturing cost, more occupied riverbed pavements during laying and space waste, so that the development of multi-core cables and dual-purpose communication and power cables has extremely high technical significance on the basis of 220kV single-core submarine cables.
In view of the above, there is a need in the market for a submarine cable that is dual-purpose for communication and power, self-reinforced in seawater, high in strength, good in toughness, resistant to breakdown, good in self-shielding property, good in water resistance, not easy to bend, long in service life, and resistant to impact and vibration, and a manufacturing method thereof.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide the dual-purpose submarine dual-three-core cable for communication and power, which has the advantages of dual-purpose communication and power, self-enhancement in seawater, high strength, good toughness, puncture resistance, good self-shielding property, good water resistance, difficult bending, long service life and impact and vibration resistance, and the manufacturing method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme: a manufacturing method of a submarine double three-core cable for communication and power comprises the following steps:
1) raw material preparation
Preparing raw materials: preparing 45 parts of indium oxide, 5-6 parts of tin oxide, 1.8-2 parts of calcium oxide, 1-1.1 parts of magnesium oxide, 0.6-0.8 part of ferric oxide, enough PVC electrostatic film, enough lead plate with the thickness of 2-2.5 mm, enough polyethylene, enough epoxy resin, enough GYTA53 optical cable (12), enough pure copper core and enough austenitic stainless steel wire according to parts by weight;
preparing auxiliary materials: preparing a pure copper plate with the surface roughness not higher than Ra0.4 and made of oxygen-free copper, preparing sufficient 1-1.5 mass percent of NaOH aqueous solution, and pressing a cylindrical metal polycrystalline die;
2) conductive self-curing film fabrication
Uniformly mixing indium oxide, tin oxide, calcium oxide, magnesium oxide and iron oxide prepared in the step 1) to obtain a metal oxide mixture;
secondly, using the metal oxide mixture obtained in the first step as a raw material, completely coating the raw material on the pure copper plate prepared in the second step of the first step by adopting a sputtering coating process, coating the raw material with the thickness of 0.5mm-0.7mm, and naturally solidifying to obtain a film to be treated;
completely immersing the pure copper plate with the surface solidified with the film to be processed obtained in the step two into the NaOH aqueous solution prepared in the step two) for 3-4 min to obtain a primary solidified film;
fourthly, the primary curing film obtained in the third step is taken down from the pure copper plate, and the required conductive self-curing film is obtained;
3) manufacture of fixing strip (6)
Processing the epoxy resin prepared in the step 1) into shapes and sizes matched with the outer surfaces of three designed core tubes and the inner surface of an outer protective sleeve by injection molding, reserving through holes matched with the outer diameter of the GYTA53 optical cable prepared in the step 1) by taking the center of gravity of three ginkgo leaf-shaped sections simultaneously contacting the outer surfaces of the core tubes and the inner surface of the outer protective sleeve as the center of a circle, and obtaining a base body of a solid strip (6);
secondly, the conductive self-curing film obtained in the stage 2) is adopted to wind and coat the GYTA53 optical cable (12) prepared in the step 1) to obtain a jacketed optical cable (12);
thirdly, heating the base body of the fixing strip (6) obtained in the first step to 65-70 ℃, sleeving the envelope optical cable (12) obtained in the second step in the through hole reserved in the first step, and cooling to room temperature to obtain the required fixing strip (6), wherein the fixing strip (6) comprises three assemblies obtained in the first step and a triangle-like fixing strip (6) base body obtained in the first step;
4) core tube manufacture
Firstly, 30 pure copper cores prepared in the step 1) are taken as a group, and the polycrystalline mould prepared in the step 1) is pressed into a cylindrical core body (1) with the diameter phi of 38.2mm to 38.8mm according to 89 percent to 91 percent of compactness;
secondly, the surface of the cylindrical core body (1) obtained in the step I is coated by the PVC electrostatic film prepared in the step 1) to obtain an electrostatic coated core body (1);
thirdly, adopting the polyethylene prepared in the step 1) and the obtained static coating core body (1) to obtain an insulating packaging core body (1);
winding and covering the insulated packaging core body (1) obtained in the step (3) by adopting the conductive self-curing film obtained in the stage 2) to obtain a primary shielding packaging core body (1);
fifthly, winding and sheathing the lead plate prepared in the step 1) outside the primary shielding packaging core body (1) obtained in the step (iv), and then welding and sealing the joint to obtain the required core pipe;
5) cable shaping
Assembling the core pipe obtained in the three stages 4) and the solid strip (6) obtained in the stage 3) into a complete cylinder, wherein the normal line of the welding seam of the lead plate on the core pipe vertically points to the outer surface of the cylinder, and then winding and coating the outer surface of the cylinder by adopting the conductive self-curing film obtained in the stage 2) to obtain a formed inner structure;
secondly, adopting the molded inner structure obtained in the polyethylene packaging step prepared in the step 1) to obtain a primary sealed inner structure;
thirdly, adopting the austenite stainless steel wire prepared in the step 1) to wind and package the initial sealed inner structure obtained in the step II to obtain a steel wire armored inner structure;
fourthly, the conductive self-curing film obtained in the stage 2) is wound and coated on the steel wire armor inner structure obtained in the step three, and a formed outer structure is obtained;
and fifthly, adopting the molded outer structure obtained in the step (iv) of uniformly encapsulating the polyethylene prepared in the step (1) to the outer diameter of 265-270 mm, and obtaining the required cable.
A dual-purpose submarine double-three-core cable for communication and power is of a three-core cable structure and comprises three core tubes which are separately sheathed and an outer-layer protective sleeve which is sheathed on all the core tubes, wherein the outer diameter of the submarine cable is 265-270 mm, each core body in the submarine cable is compacted into a cylindrical core body with the diameter phi of 38.2-phi 38.8mm by 30 pure copper cores by adopting a polycrystalline die according to 89-91% of density, and the outer surface of each core body is wrapped with a PVC-made electrostatic coating film; each core pipe is provided with a core body, an electrostatic coating film, an insulating layer, a single-core self-fixing water-blocking tape and a single-core sheath layer from inside to outside; the outer layer protective sleeve is provided with a lining self-fixing water-blocking tape, a lining layer, a steel wire armor layer, an outer lining self-fixing water-blocking tape and an outer lining layer from inside to outside; a fixing strip is filled in a gap between each core tube and the outer layer protective sleeve, the fixing strip is a sealing strip which is made of epoxy resin and is matched with the core tube and the outer layer protective sleeve in shape, the fixing strip is composed of three ginkgo leaf-shaped fixing strips and a triangle-like fixing strip, and GYTA53 optical cables wrapping the conductive self-curing film are fixed at the center of gravity of the cross section of each ginkgo leaf-shaped fixing strip; the single-core cladding layer is a metal cladding which is wrapped by adopting a lead plate with the thickness of 2mm-2.5mm and then sealed by welding; the inner lining layer and the outer lining layer are made of polyethylene materials; the single-core self-fixing water-blocking tape, the lining self-fixing water-blocking tape and the outer lining self-fixing water-blocking tape are all made of indium oxide: tin oxide: calcium oxide: magnesium oxide: iron oxide is mixed according to the mass ratio of 45: (5-6) (1.8-2) (1-1.1) (0.6-0.8), evaporating on the surface of a plane pure copper plate, primarily curing by using 1-1.5% of NaOH aqueous solution, and demoulding to obtain the conductive self-curing film.
Compared with the prior art, the invention has the following advantages: (1) the most core point of the invention is that the barrier shared by a strong-current power cable and a weak-current communication cable is broken through, the electric breakdown of strong current and the magnetic interference of electromagnetic transformation are shielded by the combined action of a plurality of conductor layers (a conductive layer constructed by two layers of indium oxide and tin oxide and an electromagnetic radiation shielding protection given by a lead plate with the thickness of 2mm-2.5 mm) and an insulating layer, and the stable operation and mutual noninterference of a power transmission copper core and a signal transmission optical fiber which are arranged in parallel are ensured. (2) The invention breaks through the technical problem that a submarine cable can not share multiple cores in the prior art, as is well known, if the submarine medium-high voltage transmission cable adopts multiple cores, the cable bears strong surface pressure, ocean current is obviously disturbed (the cable can not be deeply excavated to be laid under the seabed), the cable is easy to bend and easy to fail due to high temperature caused by mutual breakdown of voltage difference, and simultaneously seawater belongs to saline-alkali water; in addition, different from the prior art that insulating glue is directly encapsulated and a molding rubber strip is adopted for assembling and fixing, the buffer performance of the invention is greatly enhanced when the invention is impacted by external force, so that the toughness higher than that of the prior art is obtained. (3) The invention is outside the existing technology, additionally sets three layers of conductive self-curing film between the sea water and the core, the film is made by sputtering, according to the characteristic of sputtering, the film is well preserved in nature performance, the film self-bonding force is good, the density is high, the impurity is little, and five oxidation components of the invention can construct two mutually interlaced and performance complementary material systems, one is a compact conductive material system constructed by indium oxide and tin oxide, and the other is an alkali-accelerated gel curing reinforcing system constructed by calcium oxide, magnesium oxide and iron oxide in initial gel state excited by dilute alkali (according to the relevant research C-S-H gel system is firstly excited by alkali, then has good alkali-accelerated gel compactness in weak alkaline solution, and the invention adopts the corresponding proportion of saturated gel in sufficient water environment, that is, the three corresponding oxides can be continuously oxidized in seawater until the three oxides are completely gelled, thereby filling possible tiny pores of the conductive film and providing a good protection foundation for a later layer of water-blocking structure). (4) The structural design of the invention clearly shows that ten layers of protective structures with various performances are arranged between the core body and seawater, and the structures are respectively designed in a laminating cycle manner of tensile materials (membrane materials), flexible elastic materials (resin and rubber materials) and high-strength materials (metal) from the aspect of mechanical structure, so that the strength and bending resistance of the invention can be ensured, and good impact toughness can be ensured; the electrical structure is an insulating layer (PVC, resin and rubber), a weak conductor layer (conductive self-curing film) and a strong conductor layer (lead plate and steel wire armor), so that the stability and the safety of the invention can be greatly improved; from the view of water resistance performance, the water-resistant coating has physical structure water resistance (PVC, resin and rubber) and self-curing chemical reaction enhanced water resistance (conductive self-curing film). Therefore, the invention has the characteristics of dual purposes of communication and power, self-reinforcement in seawater, high strength, good toughness, breakdown resistance, good self-shielding property, good water resistance, difficult bending, long service life and impact and vibration resistance.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional shape of a fastener strip of the present invention;
in the figure: the cable comprises a core body 1, an electrostatic coating film 2, an insulating layer 3, a single-core self-fixing water-blocking tape 4, a single-core sheath layer 5, a fixing strip 6, a lining self-fixing water-blocking tape 7, an inner lining layer 8, a steel wire armor layer 9, an outer lining self-fixing water-blocking tape 10, an outer lining layer 11 and an optical cable 12.
Detailed Description
Example 1:
a dual-purpose submarine double-three-core cable for communication and power is of a three-core cable structure and comprises three core tubes which are separately sheathed and an outer-layer protective sleeve which is sheathed on all the core tubes, wherein the outer diameter of the submarine cable is 265mm, each core body 1 in the submarine cable is compacted into a cylindrical core body 1 with the diameter phi of 38.2mm by 30% of pure copper cores by adopting a polycrystalline die according to 91% density, and the outer surface of each core body 1 is wrapped with a PVC-made electrostatic coating film 2; each core pipe is provided with a core body 1, an electrostatic coating film 2, an insulating layer 3, a single-core self-fixing water-blocking tape 4 and a single-core sheath layer 5 from inside to outside; the outer protective sleeve is provided with a lining self-fixing water-blocking tape 7, an inner liner 8, a steel wire armor layer 9, an outer lining self-fixing water-blocking tape 10 and an outer lining layer 11 from inside to outside; a fixing strip 6 is filled in a gap between each core tube and the outer layer protective sleeve, the fixing strip 6 is a sealing strip which is made of epoxy resin and has a shape matched with that of the core tube and the outer layer protective sleeve, the fixing strip 6 consists of three ginkgo leaf-shaped fixing strips 6 and a triangle-like fixing strip 6, wherein GYTA53 optical cables 12 which are wrapped with conductive self-curing films are fixed at the gravity center positions of the sections of the three ginkgo leaf-shaped fixing strips 6; the single-core cladding layer 5 is a metal cladding which is wrapped by adopting a lead plate with the thickness of 2mm-2.5mm and then sealed by welding; the inner lining layer 8 and the outer lining layer 11 are made of polyethylene materials; the single-core self-fixing water-blocking tape 4, the lining self-fixing water-blocking tape 7 and the outer lining self-fixing water-blocking tape 10 are all made of indium oxide: tin oxide: calcium oxide: magnesium oxide: iron oxide is mixed according to the mass ratio of 45: 5:2:1.1:0.8, evaporating the mixture on the surface of a plane pure copper plate, initially curing the mixture by adopting a NaOH aqueous solution with the mass concentration of 1%, and demoulding the cured mixture to obtain a conductive self-curing film;
the manufacturing method of the cable comprises the following steps:
1) raw material preparation
Preparing raw materials: preparing 450kg of indium oxide, 50kg of tin oxide, 20kg of calcium oxide, 11kg of magnesium oxide, 8kg of ferric oxide, enough PVC electrostatic film, enough lead plate with the thickness of 2mm-2.5mm, enough polyethylene, enough epoxy resin, enough GYTA53 optical cable 12, enough pure copper core and enough austenitic stainless steel wire in parts by weight;
preparing auxiliary materials: preparing a pure copper plate with surface roughness Ra0.1 made of oxygen-free copper, preparing sufficient NaOH aqueous solution with mass concentration of 1%, and pressing a cylindrical metal polycrystalline die;
2) conductive self-curing film fabrication
Uniformly mixing indium oxide, tin oxide, calcium oxide, magnesium oxide and iron oxide prepared in the step 1) to obtain a metal oxide mixture;
secondly, using the metal oxide mixture obtained in the first step as a raw material, completely coating the raw material on the pure copper plate prepared in the second step of the first step by adopting a sputtering coating process, coating the raw material with the thickness of 0.5mm-0.7mm, and naturally solidifying to obtain a film to be treated;
completely immersing the pure copper plate with the surface solidified with the film to be processed obtained in the step two into the NaOH aqueous solution prepared in the step two) for 3-4 min to obtain a primary solidified film;
fourthly, the primary curing film obtained in the third step is taken down from the pure copper plate, and the required conductive self-curing film is obtained;
3) manufacture of fixing strip 6
Processing the epoxy resin prepared in the step 1) into shapes and sizes matched with the outer surfaces of three designed core tubes and the inner surface of an outer protective sleeve by injection molding, and reserving through holes matched with the outer diameter of the GYTA53 optical cable 12 prepared in the step 1) by taking the center of gravity of three ginkgo leaf-shaped sections which simultaneously contact the outer surfaces of the core tubes and the inner surface of the outer protective sleeve as the center of a circle to obtain a solid strip 6 substrate;
winding and coating the GYTA53 optical cable 12 prepared in the step 1) by adopting the conductive self-curing film obtained in the step 2) to obtain a jacketed optical cable 12;
thirdly, heating the base body of the fixing strip 6 obtained in the first step to 65-70 ℃, sleeving the optical cable 12 with the envelope obtained in the second step in the through hole reserved in the first step, and cooling to room temperature to obtain the required fixing strip 6, wherein the fixing strip 6 comprises three assemblies obtained in the first step and a base body of the fixing strip 6 with a triangle shape obtained in the first step;
4) core tube manufacture
Firstly, 30 pure copper cores prepared in the step 1) are taken as a group, and the polycrystalline mould prepared in the step 1) is pressed into a cylindrical core body 1 with the diameter phi of 38.2mm to phi of 38.8mm according to 89 percent to 91 percent of compactness;
secondly, the surface of the cylindrical core body 1 obtained in the step I is coated by the PVC electrostatic film prepared in the step 1) to obtain an electrostatic coated core body 1;
thirdly, adopting the polyethylene prepared in the step 1) and the obtained static cladding core body 1 in the step two to obtain an insulating packaging core body 1;
winding and covering the insulating packaging core body 1 obtained in the step (c) by adopting the conductive self-curing film obtained in the stage 2) to obtain a primary shielding packaging core body 1;
fifthly, winding and sheathing the lead plate prepared in the step 1) outside the primary shielding packaging core body 1 obtained in the step (iv), and then welding and sealing the joint to obtain the required core pipe;
5) cable shaping
Assembling the core pipe obtained in the three stages 4) and the solid strip (6) obtained in the stage 3) into a complete cylinder, wherein the normal line of the welding seam of the lead plate on the core pipe vertically points to the outer surface of the cylinder, and then winding and coating the outer surface of the cylinder by adopting the conductive self-curing film obtained in the stage 2) to obtain a formed inner structure;
secondly, adopting the molded inner structure obtained in the polyethylene packaging step prepared in the step 1) to obtain a primary sealed inner structure;
thirdly, adopting the austenite stainless steel wire prepared in the step 1) to wind and package the initial sealed inner structure obtained in the step II to obtain a steel wire armored inner structure;
fourthly, the conductive self-curing film obtained in the stage 2) is wound and coated on the steel wire armor inner structure obtained in the step three, and a formed outer structure is obtained;
and fifthly, adopting the molded outer structure obtained in the step (iv) of uniformly encapsulating the polyethylene prepared in the step (1) to the outer diameter of 265-270 mm, and obtaining the required cable.
The submarine cable produced according to this example had the following main performance indicators:
1. the packet loss rate of the communication signals is less than or equal to 0.01 percent;
2. the signal transmission attenuation is less than or equal to 0.22dB/km, and the requirement of TIA/EIA-568-B.3 standard is met;
3. at 20 ℃, the direct current resistance of a conductor of the power transmission part is less than or equal to 0.0176 omega/km;
4. the voltage resistance test of 330kV alternating voltage 1h (which is higher than 318kV alternating voltage of the prior art standard for 30 min) can be successfully passed, and breakdown is avoided;
5. the cable passes through a tightening test of a partial discharge test higher than a specified voltage, and the test parameters are as follows: the voltage is increased to 260kV and kept for 30 s, and then is reduced to 180kV within 1min, and no visible discharge exists;
6. the integral capacitance of the cable is less than or equal to 0.186 mu F/km;
7. the cable water-blocking test meets the water permeability test requirements specified by GB/T32346-2015 and IEC62067 standards, and after the actual measurement water pressure lasts for 24 hours under 1.0MPa, the water inlet of the cable end is 5.5m (the standard requirement is not more than 7 m).
The same goes for
Example 2:
the whole is in accordance with example 1, with the difference that:
the outer diameter of the submarine cable is 270mm, each core body 1 in the submarine cable is compressed into a cylindrical core body 1 with the diameter phi of 38.8mm by a 30-percent pure copper core through a polycrystalline die according to 89 percent of density, and the single-core self-fixing water-blocking tape 4, the lining self-fixing water-blocking tape 7 and the outer lining self-fixing water-blocking tape 10 are all made of indium oxide: tin oxide: calcium oxide: magnesium oxide: iron oxide is mixed according to the mass ratio of 45: taking a mixture mixed according to the proportion of 6:1.8:1:0.6 as a raw material, evaporating the raw material on the surface of a plane pure copper plate, initially curing the raw material by adopting a NaOH aqueous solution with the mass concentration of 1.5%, and then demoulding the obtained product to obtain a removed conductive self-curing film;
the manufacturing method of the cable comprises the following steps:
1) raw material preparation
Preparing raw materials: preparing 450kg of indium oxide, 60kg of tin oxide, 18kg of calcium oxide, 10kg of magnesium oxide and 6kg of ferric oxide according to parts by weight;
preparing auxiliary materials: preparing a pure copper plate with surface roughness Ra0.4 made of oxygen-free copper and preparing sufficient NaOH aqueous solution with mass concentration of 1.5%;
the previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (2)
1. A manufacturing method of a submarine double three-core cable for communication and power is characterized by comprising the following steps:
1) raw material preparation
Preparing raw materials: preparing 45 parts of indium oxide, 5-6 parts of tin oxide, 1.8-2 parts of calcium oxide, 1-1.1 parts of magnesium oxide, 0.6-0.8 part of ferric oxide, enough PVC electrostatic film, enough lead plate with the thickness of 2-2.5 mm, enough polyethylene, enough epoxy resin, enough GYTA53 optical cable (12), enough pure copper core and enough austenitic stainless steel wire according to parts by weight;
preparing auxiliary materials: preparing a pure copper plate with the surface roughness not higher than Ra0.4 and made of oxygen-free copper, preparing sufficient 1-1.5 mass percent of NaOH aqueous solution, and pressing a cylindrical metal polycrystalline die;
2) conductive self-curing film fabrication
Uniformly mixing indium oxide, tin oxide, calcium oxide, magnesium oxide and iron oxide prepared in the step 1) to obtain a metal oxide mixture;
secondly, using the metal oxide mixture obtained in the first step as a raw material, completely coating the raw material on the pure copper plate prepared in the second step of the first step by adopting a sputtering coating process, coating the raw material with the thickness of 0.5mm-0.7mm, and naturally solidifying to obtain a film to be treated;
completely immersing the pure copper plate with the surface solidified with the film to be processed obtained in the step two into the NaOH aqueous solution prepared in the step two) for 3-4 min to obtain a primary solidified film;
fourthly, the primary curing film obtained in the third step is taken down from the pure copper plate, and the required conductive self-curing film is obtained;
3) manufacture of fixing strip (6)
Processing the epoxy resin prepared in the step 1) into shapes and sizes matched with the outer surfaces of three designed core tubes and the inner surface of an outer protective sleeve by injection molding, reserving through holes matched with the outer diameter of the GYTA53 optical cable prepared in the step 1) by taking the center of gravity of three ginkgo leaf-shaped sections simultaneously contacting the outer surfaces of the core tubes and the inner surface of the outer protective sleeve as the center of a circle, and obtaining a base body of a solid strip (6);
secondly, the conductive self-curing film obtained in the stage 2) is adopted to wind and coat the GYTA53 optical cable (12) prepared in the step 1) to obtain a jacketed optical cable (12);
thirdly, heating the base body of the fixing strip (6) obtained in the first step to 65-70 ℃, sleeving the envelope optical cable (12) obtained in the second step in the through hole reserved in the first step, and cooling to room temperature to obtain the required fixing strip (6), wherein the fixing strip (6) comprises three assemblies obtained in the first step and a triangle-like fixing strip (6) base body obtained in the first step;
4) core tube manufacture
Firstly, 30 pure copper cores prepared in the step 1) are taken as a group, and the polycrystalline mould prepared in the step 1) is pressed into a cylindrical core body (1) with the diameter phi of 38.2mm to 38.8mm according to 89 percent to 91 percent of compactness;
secondly, the surface of the cylindrical core body (1) obtained in the step I is coated by the PVC electrostatic film prepared in the step 1) to obtain an electrostatic coated core body (1);
thirdly, adopting the polyethylene prepared in the step 1) and the obtained static coating core body (1) to obtain an insulating packaging core body (1);
winding and covering the insulated packaging core body (1) obtained in the step (3) by adopting the conductive self-curing film obtained in the stage 2) to obtain a primary shielding packaging core body (1);
fifthly, winding and sheathing the lead plate prepared in the step 1) outside the primary shielding packaging core body (1) obtained in the step (iv), and then welding and sealing the joint to obtain the required core pipe;
5) cable shaping
Assembling the core pipe obtained in the three stages 4) and the solid strip (6) obtained in the stage 3) into a complete cylinder, wherein the normal line of the welding seam of the lead plate on the core pipe vertically points to the outer surface of the cylinder, and then winding and coating the outer surface of the cylinder by adopting the conductive self-curing film obtained in the stage 2) to obtain a formed inner structure;
secondly, adopting the molded inner structure obtained in the polyethylene packaging step prepared in the step 1) to obtain a primary sealed inner structure;
thirdly, adopting the austenite stainless steel wire prepared in the step 1) to wind and package the initial sealed inner structure obtained in the step II to obtain a steel wire armored inner structure;
fourthly, the conductive self-curing film obtained in the stage 2) is wound and coated on the steel wire armor inner structure obtained in the step three, and a formed outer structure is obtained;
and fifthly, adopting the molded outer structure obtained in the step (iv) of uniformly encapsulating the polyethylene prepared in the step (1) to the outer diameter of 265-270 mm, and obtaining the required cable.
2. The utility model provides a two three-core cable in dual-purpose seabed of communication electric power, wholly is three-core cable structure, comprises the outer protective sheath of three core pipes that singly wrap up and all core pipes of suit, its characterized in that: the submarine cable is 265-270 mm in outer diameter, each core (1) in the submarine cable is compacted into a cylindrical core (1) with the diameter phi of 38.2-phi 38.8mm by 30 pure copper cores through a polycrystalline die according to 89-91% of compactness, and the outer surface of each core (1) is wrapped with a PVC static coating film (2); each core pipe is provided with a core body (1), an electrostatic coating film (2), an insulating layer (3), a single-core self-fixing water-blocking tape (4) and a single-core sheath layer (5) from inside to outside; the outer protective sleeve is provided with a lining self-fixing water-blocking tape (7), an inner lining layer (8), a steel wire armor layer (9), an outer lining self-fixing water-blocking tape (10) and an outer lining layer (11) from inside to outside; a fixing strip (6) is filled in a gap between each core tube and the outer layer protective sleeve, the fixing strip (6) is a sealing strip which is made of epoxy resin and is matched with the core tube and the outer layer protective sleeve in shape, the fixing strip (6) consists of three ginkgo leaf-shaped fixing strips (6) and one triangle-like fixing strip (6), wherein GYTA53 optical cables (12) which are wrapped with conductive self-curing films are fixed at the gravity center positions of the sections of the three ginkgo leaf-shaped fixing strips (6); the single-core cladding layer (5) is a metal cladding which is wrapped by adopting a lead plate with the thickness of 2mm-2.5mm and then sealed by welding; the inner lining layer (8) and the outer lining layer (11) are made of polyethylene materials; the single-core self-fixing water-blocking tape (4), the lining self-fixing water-blocking tape (7) and the outer lining self-fixing water-blocking tape (10) are all made of indium oxide: tin oxide: calcium oxide: magnesium oxide: iron oxide is mixed according to the mass ratio of 45: (5-6) (1.8-2) (1-1.1) (0.6-0.8), evaporating on the surface of a plane pure copper plate, primarily curing by using 1-1.5% of NaOH aqueous solution, and demoulding to obtain the conductive self-curing film.
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| US3850971A (en) * | 1969-12-18 | 1974-11-26 | Dynamit Nobel Ag | Porous silicic acid and its production |
| CN1546413A (en) * | 2003-12-01 | 2004-11-17 | 同济大学 | Booster for industrial waste residue coal gangue and method for preparing the same |
| CN102420033A (en) * | 2011-06-30 | 2012-04-18 | 山东阳谷电缆集团有限公司 | Photoelectric composite submarine cable |
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| CN110322989A (en) | 2019-10-11 |
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