CN115565720A - Sinking and floating type multipurpose submarine cable and manufacturing method thereof - Google Patents

Abstract

The embodiment of the application provides a formula of floating multipurpose submarine cable sinks, formula of floating multipurpose submarine cable includes many split phase sinle silks, the split phase sinle silk includes first foaming layer, the foaming rate on first foaming layer is greater than 90%, many split phase sinle silks strand with light-duty filler jointly and form the cable sinle silk, the cladding of cable sinle silk outside has the second foaming layer, the foaming rate on second foaming layer is greater than 90%, the outer cladding of second foaming layer has the protection against insects metallic shield layer, the outer cladding of protection against insects metallic shield layer has the all package type plastics sheath of non-hydroscopicity. The utility model provides a floating multipurpose submarine cable that sinks can realize floating submarine cable and seabed and bury ground submarine cable dual function, can satisfy different service conditions and realize laying of different environment, need not to design alone and production to different submarine cables, has reduced design, construction, manufacturing cost. The embodiment of the application also provides a manufacturing method of the sinking and floating type multipurpose submarine cable.

Description

Sinking and floating type multipurpose submarine cable and manufacturing method thereof

Technical Field

The application relates to the field of new energy, in particular to a sinking and floating type multipurpose submarine cable and a manufacturing method thereof.

Background

China is rich in ocean resources, offshore wind power has wide prospects, offshore wind power can be developed without a submarine cable, the submarine cable is used as a middle link, and offshore clean energy is transmitted to an onshore power grid for utilization. With the rapid development of ocean wind power in recent years, offshore resources become more and more tense, and in order to utilize natural clean energy to a greater extent, ocean wind power tends to gradually develop from offshore wind power to open-sea wind power. However, the environment of the open sea area is complex and changeable, the open sea wind power is more prone to acquire energy by using a floating type fan, and the development of a light floating type submarine cable matched with the floating type fan is imperative.

In the existing submarine cable patent, the designed submarine cable has single use condition and does not have the dual functions of buried use and floating use. The traditional floating type submarine cable basically adopts a structure that a plurality of cores are twisted and formed and then reinforced by steel wire armoring and protected by a plastic protective layer, a large number of floating blocks are required to be added in the laying process to realize the floating of the submarine cable in seawater, so that the transmission function of the floating type submarine cable is realized, but the structure is not suitable for buried laying; meanwhile, the transmission capacity is greatly reduced due to the buoyancy requirement, and large-capacity transmission cannot be realized. And traditional submarine buried submarine cables are formed by twisting power cable cores and optical units and filling and molding fillers and then winding one or more layers of steel wire armoring, asphalt coating and multiple layers of polypropylene ropes.

How to solve the above problems and provide a multipurpose submarine cable having dual functions of a floating submarine cable and a submarine buried submarine cable is considered by those skilled in the art.

Disclosure of Invention

The embodiment of the application provides a formula of floating multipurpose submarine cable sinks, formula of floating multipurpose submarine cable includes many split phase sinle silk, the split phase sinle silk includes first foaming layer, the foaming rate on first foaming layer is greater than 90%, many split phase sinle silk strands jointly with light-duty filler and forms the cabling sinle silk, the cladding of cabling sinle silk outside has the second foaming layer, the foaming rate on second foaming layer is greater than 90%, the outer cladding of second foaming layer has protection against insects metallic shield layer, protection against insects metallic shield layer outer cladding has non-hydroscopicity's system type plastics sheath.

In a possible embodiment, the split-phase wire core comprises a water-blocking conductor, and a composite co-extrusion layer, a first water-blocking layer, a first shielding layer, a second water-blocking layer, a first plastic sheath layer, a first foaming layer, a second shielding layer and a second plastic sheath layer which are sequentially coated outside the water-blocking conductor; the system type plastics sheath of package outward in proper order the cladding have armor and outer tegument, the armor includes many armor and interval and locates optical unit between the armor.

In one possible embodiment, the materials of the first foaming layer and the second foaming layer comprise foamed polyethylene, azodiisobutyronitrile, azodicarbonamide, water-blocking powder and stabilizer, wherein azodiisobutyronitrile accounts for 1.5%, azodicarbonamide accounts for 1%, water-blocking powder accounts for 2%, stabilizer accounts for 0.5%, foamed polyethylene accounts for 90%, and other components account for 5%; the first plastic protective layer, the second plastic protective layer and the sleeve-type plastic protective layer are made of polyethylene, polyisobutylene, stearic acid and an antioxidant, wherein the polyisobutylene accounts for 1%, the stearic acid accounts for 2%, the antioxidant accounts for 1%, the polyethylene accounts for 92%, and other components account for 4%.

The embodiment of the application also provides a manufacturing method of the sinking and floating type multipurpose submarine cable, which comprises the following steps:

step S1: adding a water-blocking glue in the twisting process of the conductor monofilaments, filling the water-blocking glue among the conductor monofilaments, winding a semi-conductive water-blocking tape on the outer side, and tightly pressing to obtain a water-blocking conductor;

step S2: extruding the water-blocking conductor to form a composite co-extrusion layer wrapping the water-blocking conductor;

and step S3: sequentially forming a first waterproof layer, a first shielding layer and a second waterproof layer which are arranged in a wrapping mode on the outer side of the composite co-extrusion layer;

and step S4: extruding the outer side of the second water-resistant layer to form a first plastic protective layer;

step S5: extruding the outer side of the first plastic protective layer to form a first foaming layer, wherein the foaming degree of the first foaming layer is more than 90%;

step S6: longitudinally wrapping a metal strip on the outer side of the first foaming layer, welding the joint of the metal strip, and rolling the metal strip into a corrugated structure through a spiral mold to obtain an outer metal layer;

step S7: extruding and forming a second plastic protective layer on the outer side of the outer metal layer to obtain a split-phase wire core;

step S8: twisting the split-phase wire cores and light fillers together, and winding and shaping the twisted split-phase wire cores by using a wrapping tape to obtain a cable core;

step S9: extruding a second foaming layer at the outer side of the cabling core, wherein the foaming degree of the second foaming layer is more than 90%;

step S10: winding the outer side of the second foaming layer to form an insect-proof metal shielding layer, and extruding the outer side of the insect-proof metal shielding layer to form a system-packaged plastic protective layer;

step S11: and an armor layer comprising an optical unit and a filler strip armor layer is arranged on the outer side of the all-in-one plastic sheath layer, and an outer covering layer is arranged on the outer side of the armor layer.

In one possible embodiment, in step S1: stranding a plurality of conductor monofilaments by adopting a multi-disc frame stranding machine to strand a water-blocking conductor, wherein in the stranding process, each layer is provided with two stranding forming dies, and water-blocking glue is added at the stranding point of the first stranding forming die of each layer stranded by the conductor monofilaments so as to fill the water-blocking glue into gaps among the conductor monofilaments; and winding or longitudinally wrapping a layer of semi-conductive water-blocking tape, and under the compression of a second twisted forming die of each layer, enabling the water-blocking tape and the water-blocking glue to form a water-blocking layer together, thereby obtaining the water-blocking conductor.

In a possible embodiment, in step S2, the composite co-extruded layer is a composite of a conductor shielding layer, a crosslinked polyethylene insulating layer and an insulation shielding layer, and the conductor shielding layer, the crosslinked polyethylene insulating layer and the insulation shielding layer are simultaneously extruded outside the water blocking conductor by using three specially-made extruders and a machine head; the components of the conductor shielding layer, the crosslinked polyethylene insulating layer and the insulation shielding layer all comprise polyethylene, the extrusion temperature of the conductor shielding layer and the insulation shielding layer is 80-110 ℃ from the machine body to the machine head, the melting temperature of the conductor shielding layer and the insulation shielding layer is not more than 110 ℃, the extrusion temperature of the crosslinked polyethylene insulating layer is 90-120 ℃ from the machine body to the machine head, and the melting temperature of the crosslinked polyethylene insulating layer is not more than 130 ℃; after the co-extrusion of the composite co-extrusion layer is finished, enabling the crosslinked polyethylene insulation layer to finish a chemical crosslinking process under the nitrogen atmosphere in a plurality of closed pipelines, wherein the nitrogen pressure range is 8Bar to 10Bar, the temperature range of each pipeline is 250 ℃ to 400 ℃, and then performing cooling molding by nitrogen gas cooling or water to obtain the composite co-extrusion layer; in the step S3, the first waterproof layer, the first shielding layer and the second waterproof layer are sequentially coated on the outer side of the composite co-extrusion layer by a wrapping machine.

In a possible embodiment, in step S4, extruding the first plastic sheath layer outside the second water-blocking layer by using an extruding machine, wherein the temperature of the extruding machine from the machine body to the machine head is 130 ℃ to 220 ℃, after the extruding of the first plastic sheath layer is completed, the first plastic sheath layer enters a first section of cooling water tank for preliminary fixing and forming, the temperature of the first section of cooling water tank ranges from 70 ℃ to 80 ℃, and then enters a second section of cooling water tank for secondary cooling, and the temperature of the second section of cooling water tank is lower than 25 ℃; in step S7, a plastic extruding machine is adopted to extrude the second plastic protective layer out of the outer metal layer, the temperature of the plastic extruding machine from the machine body to the machine head is 130-220 ℃, after the second plastic protective layer is extruded, the second plastic protective layer enters a first section of cooling water tank for preliminary fixing and forming, the temperature range of the first section of cooling water tank is 70-80 ℃, and then the second plastic protective layer enters a second section of cooling water tank for secondary cooling, and the temperature of the second section of cooling water tank is lower than 25 ℃.

In a possible embodiment, in step S5, nitrogen is injected during the plastic extrusion process to complete the extrusion of the foaming material by using an extruder and a gas injection machine in combination, and the first foaming layer is obtained by water cooling; in step S9, the extruding machine and the gas injection machine are matched, nitrogen is injected in the plastic extrusion process to complete the extrusion of the foaming material, and the second foaming layer is obtained through water cooling.

In one possible embodiment, in step S6, the embossing depth ranges from 0.5mm to 1.5mm, with each complete thread pitch being 25 to 35mm; in the step S8, twisting the multiple sections of the split-phase wire cores and the light filler together by using a cabling machine and lapping and shaping the split-phase wire cores and the light filler by using a lapping tape, wherein the twisting pitch diameter ratio is 20-25, and the lapping and covering rate of the lapping tape is 30-45%.

In a possible embodiment, in step S10, the insect-proof metal shielding layer is longitudinally wrapped and tightly pressed on the outer side of the second foaming layer, the edge of the insect-proof metal shielding layer is overlapped by 10mm to 20mm, after the winding of the insect-proof metal shielding layer is completed, the material directly enters an extruding machine, and the plastic sheath is extruded on the outer side of the insect-proof metal shielding layer to form the wrapped plastic sheath; in step S11, a 800-type large armoring machine is adopted to strand optical units and armoring materials on the outer side of the completely wrapped plastic sheath, and then a wrapping layer is wrapped on the outer side of the armoring layer by using a wrapping machine for tightening protection, wherein the strand pitch diameter ratio is 8-10, the wrapping pitch range of the wrapping layer is 200 mm-300 mm, and the diameter of the optical units is smaller than 10% of the diameter of the armoring materials.

Compared with the prior art, the sinking-floating type multipurpose submarine cable and the manufacturing method thereof provided by the embodiment of the application have the advantages that the double functions of floating and burying the submarine cable are realized, so that the laying efficiency of the product is improved, the service life is prolonged, the cost of the product is effectively reduced, and the product has larger capacity. The utility model provides a floating multipurpose submarine cable that sinks can realize floating submarine cable and seabed and bury ground submarine cable dual function, can satisfy different service conditions to the realization is laid in different environment, avoids design, construction, manufacturing cost alone to different submarine cables and produces, has reduced the wasting of resources. Meanwhile, the sinking-floating type multipurpose submarine cable overcomes the defect that the buoyancy of a large-section submarine cable is insufficient and a large number of accessory accessories need to be used, the sinking-floating type multipurpose submarine cable can realize the suspension of the submarine cable by adopting 1/10 of floating blocks of the traditional floating type submarine cable, the construction workload and the production cost are reduced, and the risk that the floating blocks are damaged by marine organisms to lose corresponding effects is reduced.

Drawings

Fig. 1 is a schematic structural view of a floating multipurpose submarine cable according to an embodiment of the present invention.

Fig. 2 is a schematic flow chart of a method for manufacturing the floating-sinking multipurpose submarine cable according to the embodiment of the present application.

Description of the main elements

Sinking-floating type multipurpose submarine cable 1

Cabling core 10

Light weight filler 11

Split phase core 12

Water blocking conductor 120

Conductor monofilament 1201

Water-blocking glue 1202

Water blocking tape 1203

Composite co-extruded layer 121

First water resistant layer 122

First shield layer 123

Second water resistant layer 124

First plastic protective layer 125

First foamed layer 126

Second shield layer 127

Second plastic sheath 128

Wrapping layer 13

Second foamed layer 14

Insect-proof metal shielding layer 15

Plastic sheath 16

Armor layer 17

Light unit 171

Armor material 172

Outer tegument 18

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

The following description will refer to the accompanying drawings to more fully describe the present disclosure. There is shown in the drawings exemplary embodiments of the present application. This application may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Like reference numerals designate identical or similar components.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Further, as used herein, "comprises" and/or "comprising" and/or "having," integers, steps, operations, components, and/or components, but does not preclude the presence or addition of one or more other features, regions, integers, steps, operations, components, and/or groups thereof.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Furthermore, unless otherwise defined herein, terms such as those defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present application and will not be interpreted in an idealized or overly formal sense.

Embodiments of the present application will now be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, the present application provides a sinking and floating type multipurpose submarine cable 1, where the sinking and floating type multipurpose submarine cable 1 includes multiple split-phase cable cores 12, each split-phase cable core 12 includes a first foamed layer 126, a foaming rate of the first foamed layer 126 is greater than 90%, the multiple split-phase cable cores 12 are twisted together with a light filler 11 to form a cable core 10, a second foamed layer 14 is coated outside the cable core 10, a foaming rate of the second foamed layer 14 is greater than 90%, an insect-proof metal shielding layer 15 is coated outside the second foamed layer 14, and a non-water-absorbing, integrally-wrapped plastic protective layer 16 is coated outside the insect-proof metal shielding layer 15.

In an embodiment, the split phase wire core 12 includes a water blocking conductor 120, and a composite co-extrusion layer 121, a first water blocking layer 122, a first shielding layer 123, a second water blocking layer 124, a first plastic sheath 125, a first foaming layer 126, a second shielding layer 127, and a second plastic sheath 128 sequentially covering the water blocking conductor 120.

In an embodiment, the multiple split-phase wire cores 12 and the light filler 11 are twisted together to form and are wrapped and shaped by the wrapping tape 13 to obtain the cabled wire core 10, the second foam layer 14 is disposed outside the wrapping tape 13, the insect-proof metal shielding layer 15 is disposed outside the second foam layer 14, the totally wrapped plastic sheath 16 is disposed outside the insect-proof metal shielding layer 15, the totally wrapped plastic sheath 16 is sequentially wrapped with the armor layer 17 and the outer sheath layer 18, and the armor layer 17 includes multiple armor materials 172 and optical units 171 disposed between the armor materials 172 at intervals.

In one embodiment, a lightweight filler 11 is used for the filling, so that the cabled core 10 is more round and lighter in weight. The wrapping layer 13 can be formed by compounding synthetic fibers, adhesives and the like and can be used as a stabilizing layer of the cable core 10. The insect-proof metal shielding layer 15 is a metal composite belt structure, and can be a plastic copper aluminum composite belt with excellent performance, wherein the plastic accounts for 2 components, the copper belt accounts for 2 components, the aluminum belt accounts for 1 component, the surface of the copper belt is an aluminum material, the aluminum material is plastic, and the three materials are tightly bonded together to form the metal composite belt; the insect-proof metal shielding layer 15 is formed by winding in a longitudinal wrapping mode.

In one embodiment, the optical unit 171 and the armoring material 172 are armored on the system-in-package plastic sheath 16 to form an armoring layer 17; wherein, light unit 171 can set up in the stainless steel tubular metal resonator for protect light unit 171 not receive the damage in the armor process, armor material 172 can be copper wire, steel wire, aluminium silk or high strength fiber strip. The outer layer 18 is formed by winding one or more layers of polypropylene rope to protect the armor 17.

In one embodiment, water blocking conductor 120 includes a plurality of twisted conductor monofilaments 1201, water blocking glue 1202 is filled between the plurality of conductor monofilaments 1201, each conductor monofilament 1201 is wrapped by water blocking glue 1202, and water blocking tape 1203 is wrapped outside twisted conductor monofilaments 1201 and water blocking glue 1202. The water blocking glue 1202 mainly comprises organic silicon glue and carbon black, wherein the content of the organic silicon glue and the carbon black accounts for 60% -80%, the water content of the water blocking glue 1202 is not more than 0.1%, and the water blocking performance of the water blocking conductor 120 can be realized by matching the water blocking glue 1202 with the water blocking tape 1203.

In an embodiment, the composite co-extrusion layer 121 covers the outer side of the water-blocking conductor 120, the composite co-extrusion layer 121 is a composite of a conductor shielding layer, a crosslinked polyethylene insulating layer and an insulating shielding layer, and the composite co-extrusion layer 121 may be composed of a semi-conductive water-blocking tape, a conductor semiconductive material, an insulating material, and an insulating semiconductive material.

In an embodiment, the first water-blocking layer 122 and the second water-blocking layer 124 may be tape-wrapped structures, and are formed by winding the high-strength water-blocking tape 1203 with excellent water-blocking performance; the water blocking tape 1203 is formed by compounding polyester fabric, a semi-conductive adhesive, high-speed expansion water absorption resin and the like. The first water-resistant layer 122 is wound on the outer side of the composite co-extrusion layer 121, and the second water-resistant layer 124 is wound on the outer side of the first shielding layer 123 to serve as a longitudinal water-resistant structure.

In one embodiment, the first shielding layer 123 and the second shielding layer 127 may be formed by winding metal strips, and the metal strips may be low-resistance high-efficiency metal strips or metal composite strips with excellent water blocking performance; the first shielding layer 123 and the second shielding layer 127 are wound by the metal strip in a wrapping or longitudinal wrapping manner, the first shielding layer 123 is wound outside the first water-blocking layer 122, and the second shielding layer 127 is wound outside the first foaming layer 126.

In one embodiment, the materials of the first foamed layer 126 and the second foamed layer 14 include foamed polyethylene, azobisisobutyronitrile, azodicarbonamide, water blocking powder, and stabilizer, wherein azodicarbonamide accounts for 1.5%, azodicarbonamide accounts for 1%, water blocking powder accounts for 2%, stabilizer accounts for 0.5%, foamed polyethylene accounts for 90%, and other components account for 5%. The first foaming layer 126 is disposed outside the first plastic protective layer 125, the second foaming layer 14 is disposed outside the belting layer 13, and the first foaming layer 126 and the second foaming layer 14 serve as main floating functional layers in the ups and downs type multipurpose submarine cable 1 and can provide buoyancy for the ups and downs type multipurpose submarine cable 1.

In one embodiment, the materials of the first plastic protection layer 125, the second plastic protection layer 128 and the primary plastic protection layer 16 include polyethylene, polyisobutylene, stearic acid and antioxidant, wherein polyisobutylene accounts for 1%, stearic acid accounts for 2%, antioxidant accounts for 1%, polyethylene accounts for 92%, and other components account for 4%. The first plastic protective layer 125 is disposed outside the second water-blocking layer 124, the second plastic protective layer 128 is disposed outside the second shielding layer 127, the wrapped plastic protective layer 16 is disposed outside the insect-proof metal shielding layer 15, and the first plastic protective layer 125, the second plastic protective layer 128 and the wrapped plastic protective layer 16 can be used as water-blocking protective layers.

Further referring to fig. 2, the present application provides a method for manufacturing a floating multi-purpose submarine cable, comprising the steps of:

step S1: and manufacturing a water-blocking conductor, adding water-blocking glue in the conductor monofilament twisting process, filling the water-blocking glue among the conductor monofilaments, winding a semi-conductive water-blocking tape on the outer side, and tightly pressing to manufacture the water-blocking conductor.

In an embodiment, a multi-disc frame stranding machine is adopted to strand a plurality of conductor monofilaments to strand a water-blocking conductor, two stranding dies are arranged on each layer in the stranding process, water-blocking glue is added at a stranding point of a first stranding die of each layer in which the conductor monofilaments are stranded, the water-blocking glue is filled in gaps among the plurality of conductor monofilaments, then a layer of semi-conductive water-blocking tape is arranged in a wrapping mode or a longitudinal wrapping mode, and the water-blocking tape and the water-blocking glue form a water-blocking layer under the pressing of a second stranding die of each layer to obtain the water-blocking conductor.

Step S2: and extruding the water-blocking conductor to form the composite co-extrusion layer.

In one embodiment, the composite co-extrusion layer is a composite of a conductor shielding layer, a crosslinked polyethylene insulating layer and an insulation shielding layer, and the conductor shielding layer, the crosslinked polyethylene insulating layer and the insulation shielding layer are simultaneously extruded outside the water blocking conductor by three specially-made extruding machines and a machine head. The components of the conductor shielding layer, the crosslinked polyethylene insulating layer and the insulation shielding layer all comprise polyethylene, the extrusion temperature of the conductor shielding layer and the insulation shielding layer is 80-110 ℃ from the machine body to the machine head, the melting temperature of the conductor shielding layer and the insulation shielding layer is not more than 110 ℃, the extrusion temperature of the crosslinked polyethylene insulating layer is 90-120 ℃ from the machine body to the machine head, and the melting temperature of the crosslinked polyethylene insulating layer is not more than 130 ℃. After the co-extrusion of the composite co-extrusion layer is completed, the crosslinked polyethylene insulating layer is subjected to a chemical crosslinking process under the nitrogen atmosphere in a plurality of closed pipelines, the nitrogen pressure range is 8Bar to 10Bar, the temperature range of each pipeline is 250 ℃ to 400 ℃, the temperature of the plurality of pipelines is set by adopting the wave-type principle of firstly reducing, then increasing, then reducing and then increasing, and then the composite co-extrusion layer is obtained by cooling and forming through nitrogen gas or water.

And step S3: and a first water-resistant layer, a first shielding layer and a second water-resistant layer are sequentially coated and arranged on the outer side of the composite co-extrusion layer.

In one embodiment, the first water-resistant layer, the first shielding layer and the second water-resistant layer are sequentially coated on the outer side of the composite co-extrusion layer by a wrapping machine.

And step S4: and extruding the outer side of the second water-resistant layer to form a first plastic protective layer.

In an embodiment, the first plastic protective layer is extruded outside the second water-blocking layer by an extruding machine, the temperature of the extruding machine from the machine body to the machine head is 130 ℃ to 220 ℃, the first plastic protective layer is made to enter a first section of cooling water tank for preliminary fixing and forming after being extruded, the temperature of the first section of cooling water tank is 70 ℃ to 80 ℃, then the first plastic protective layer is made to enter a second section of cooling water tank for second-step cooling, the temperature of the second section of cooling water tank is lower than 25 ℃, and the first plastic protective layer is made after being cooled for the second time.

Step S5: and extruding to form a first foaming layer at the outer side of the first plastic protective layer, wherein the foaming degree of the first foaming layer is more than 90%.

In one embodiment, the first foamed layer is obtained by water cooling after nitrogen is injected to complete the extrusion of the foaming material during the plastic extrusion process by using an extruder and a gas injection machine in combination.

Step S6: and longitudinally wrapping a metal strip on the outer side of the first foaming layer, welding the joint of the metal strip, and rolling the metal strip into a corrugated structure through a spiral mould to obtain the outer metal layer.

In one embodiment, the range of the embossing depth is 0.5mm to 1.5mm, and the pitch of each complete thread is 25mm to 35mm.

Step S7: and extruding to form a second plastic protective layer outside the outer metal layer, and obtaining the split-phase wire core.

In one embodiment, the second plastic protective layer is extruded outside the outer metal layer by an extruding machine, the temperature of the extruding machine from the machine body to the machine head is 130-220 ℃, the second plastic protective layer is fed into a first section of cooling water tank for primary fixing and forming after being extruded, the temperature of the first section of cooling water tank is 70-80 ℃, then the second plastic protective layer is fed into a second section of cooling water tank for secondary cooling, the temperature of the second section of cooling water tank is lower than 25 ℃, and the second plastic protective layer is fed into a multi-drive folding and unfolding integrated storage disc after secondary cooling, so that the second plastic protective layer is manufactured.

Step S8: and twisting the split-phase wire cores and the light filler together, and winding and shaping by using a wrapping tape after twisting to obtain the cable core.

In one embodiment, the split-phase wire core is divided into a plurality of sections, the plurality of sections of split-phase wire core and the light filler are twisted together by a cabling machine and are lapped and shaped by a lapping tape, wherein the ratio of the twisted pitch diameter is 20-25, and the lapping and covering rate of the lapping tape is 30-45%.

Step S9: and extruding to form a second foaming layer outside the cabling core.

In one embodiment, the extrusion of the foaming material is completed by injecting nitrogen gas during the plastic extrusion process through an extruder and a gas injection machine, and the second foaming layer is obtained through water cooling.

Step S10: and winding the outer side of the second foaming layer to form an insect-proof metal shielding layer, and extruding the outer side of the insect-proof metal shielding layer to form a uniformly-wrapped plastic protective layer.

In one embodiment, a series production mode is adopted, so that the insect-proof metal shielding layer and the plastic protective layer are synchronously produced, the circulation period is saved, and the energy consumption is reduced. And (4) longitudinally wrapping and pressing the insect-proof metal shielding layer on the outer side of the second foaming layer, overlapping the edge of the insect-proof metal shielding layer by 10-20 mm, and after the insect-proof metal shielding layer is wound, enabling the material to directly enter an extruding machine, and completing the manufacturing of the partially wrapped plastic protective layer by adopting the mode of the step 4.

Step S11: and an armor layer comprising an optical unit and a filler strip armor layer is arranged on the outer side of the all-in-one plastic sheath layer, and an outer covering layer is arranged on the outer side of the armor layer.

In an embodiment, a series production mode is adopted, so that an optical unit + filler strip armor layer and an outer layer are synchronously completed, an 800-type large armoring machine is adopted to twist prepared optical units and armor materials outside a system-type plastic sheath, and then a winding machine is used for winding the outer layer outside the armor layer for tightening protection, wherein the twist pitch ratio is 8-10, the winding pitch range of the outer layer is 200-300 mm, and the diameter of the optical units is smaller than 10% of the diameter of the armor materials and is used for protecting the optical units from being damaged.

Compared with the prior art, the sinking-floating type multipurpose submarine cable and the manufacturing method thereof provided by the embodiment of the application have the advantages that the laying efficiency of the product is improved, the service life is prolonged by realizing the dual functions of floating and burying the submarine cable, and the cost of the product is effectively reduced. The utility model provides a formula of floating multipurpose submarine cable that sinks can realize floating submarine cable and seabed and bury ground submarine cable dual function, can satisfy different service conditions to the realization is laid in different environment, avoids designing alone and producing different submarine cables, has reduced design, construction, manufacturing cost, has reduced the wasting of resources. Meanwhile, the sinking-floating type multipurpose submarine cable overcomes the defect that the buoyancy of a large-section submarine cable is insufficient and a large number of accessory accessories need to be used, the sinking-floating type multipurpose submarine cable can realize the suspension of the submarine cable by adopting 1/10 of floating blocks of the traditional floating type submarine cable, the construction workload and the production cost are reduced, and the risk that the floating blocks are damaged by marine organisms to lose corresponding effects is reduced.

Hereinbefore, specific embodiments of the present application are described with reference to the drawings. However, those skilled in the art will appreciate that various modifications and substitutions can be made to the specific embodiments of the present application without departing from the scope of the present application. Such modifications and substitutions are intended to be within the scope of the present application.

Claims (10)

1. The utility model provides a heavy floating multipurpose submarine cable, a serial communication port, heavy floating multipurpose submarine cable includes many split phase sinle silk, split phase sinle silk includes first foaming layer, the foaming rate on first foaming layer is greater than 90%, many split phase sinle silk and light-duty filler transposition jointly form the stranding sinle silk, the cladding of stranding sinle silk outside has the second foaming layer, the foaming rate on second foaming layer is greater than 90%, the outer cladding of second foaming layer has protection against insects metallic shield layer, protection against insects metallic shield layer outer cladding has non-hydroscopicity's package type plastics sheath.

2. The ups and downs multipurpose submarine cable according to claim 1, wherein the split-phase cable core comprises a water blocking conductor, and a composite co-extrusion layer, a first water blocking layer, a first shielding layer, a second water blocking layer, a first plastic protective layer, the first foaming layer, the second shielding layer and a second plastic protective layer sequentially coated outside the water blocking conductor; all system's type plastics sheath outward in proper order the cladding have armor and outer tegument, the armor includes many armor and the interval is located optical unit between the armor.

3. The ups and downs multipurpose submarine cable according to claim 2, wherein the materials of the first foamed layer and the second foamed layer comprise foamed polyethylene, azobisisobutyronitrile, azodicarbonamide, water-blocking powder and stabilizer, wherein the proportion of azodiisobutyronitrile is 1.5%, the proportion of azodicarbonamide is 1%, the proportion of water-blocking powder is 2%, the proportion of stabilizer is 0.5%, the proportion of foamed polyethylene is 90%, and the proportion of other components is 5%; the first plastic protective layer, the second plastic protective layer and the sleeve-type plastic protective layer are made of polyethylene, polyisobutylene, stearic acid and an antioxidant, wherein the polyisobutylene accounts for 1%, the stearic acid accounts for 2%, the antioxidant accounts for 1%, the polyethylene accounts for 92%, and other components account for 4%.

4. A method for manufacturing a floating type multipurpose submarine cable, wherein the method for manufacturing a floating type multipurpose submarine cable according to any one of claims 1 to 3 comprises the steps of:

step S1: adding a water-blocking glue in the twisting process of the conductor monofilaments, filling the water-blocking glue among the conductor monofilaments, winding a semi-conductive water-blocking tape on the outer side, and tightly pressing to obtain a water-blocking conductor;

step S2: extruding the water-blocking conductor to form a composite co-extrusion layer wrapping the water-blocking conductor;

and step S3: sequentially forming a first waterproof layer, a first shielding layer and a second waterproof layer which are arranged in a wrapping mode on the outer side of the composite co-extrusion layer;

and step S4: extruding the outer side of the second water-resistant layer to form a first plastic protective layer;

step S5: extruding the outer side of the first plastic protective layer to form a first foaming layer, wherein the foaming degree of the first foaming layer is more than 90%;

step S6: longitudinally wrapping a metal strip on the outer side of the first foaming layer, welding a joint of the metal strip, and rolling the metal strip into a corrugated structure through a spiral mold to obtain an outer metal layer;

step S7: extruding and forming a second plastic protective layer on the outer side of the outer metal layer to obtain a split-phase wire core;

step S8: twisting the split-phase wire cores and light fillers together, and winding and shaping the twisted split-phase wire cores by using a wrapping tape to obtain a cable core;

step S9: extruding a second foaming layer outside the cabling core, wherein the foaming degree of the second foaming layer is more than 90%;

step S10: winding the outer side of the second foaming layer to form an insect-proof metal shielding layer, and extruding the outer side of the insect-proof metal shielding layer to form a system-packaged plastic protective layer;

step S11: and an armor layer comprising an optical unit and a filler strip armor layer is arranged on the outer side of the all-in-one plastic sheath layer, and an outer covering layer is arranged on the outer side of the armor layer.

5. The method for manufacturing a multi-purpose submarine cable according to claim 4, wherein in step S1:

stranding a plurality of conductor monofilaments by adopting a multi-disc frame stranding machine to strand a water-blocking conductor, wherein in the stranding process, each layer is provided with two stranding forming dies, and water-blocking glue is added at the stranding point of the first stranding forming die of each layer stranded by the conductor monofilaments so as to fill the water-blocking glue into gaps among the conductor monofilaments;

and winding or longitudinally wrapping a layer of semi-conductive water-blocking tape, and under the compression of a second twisted forming die of each layer, enabling the water-blocking tape and the water-blocking glue to form a water-blocking layer together, thereby obtaining the water-blocking conductor.

6. The method of manufacturing a multi-purpose submarine cable according to claim 4, wherein:

in the step S2, the composite co-extrusion layer is formed by compounding a conductor shielding layer, a crosslinked polyethylene insulating layer and an insulating shielding layer, and the conductor shielding layer, the crosslinked polyethylene insulating layer and the insulating shielding layer are simultaneously extruded outside the water-blocking conductor by adopting three specially-made extruding machines and a machine head; the components of the conductor shielding layer, the crosslinked polyethylene insulating layer and the insulation shielding layer all comprise polyethylene, the extrusion temperature of the conductor shielding layer and the insulation shielding layer is 80-110 ℃ from a machine body to a machine head, the melting temperature of the conductor shielding layer and the insulation shielding layer is not more than 110 ℃, the extrusion temperature of the crosslinked polyethylene insulating layer is 90-120 ℃ from the machine body to the machine head, and the melting temperature of the crosslinked polyethylene insulating layer is not more than 130 ℃; after the co-extrusion of the composite co-extrusion layer is finished, enabling the crosslinked polyethylene insulating layer to finish a chemical crosslinking process under the nitrogen atmosphere in a closed multi-section pipeline, wherein the nitrogen pressure range is 8Bar to 10Bar, the temperature range of each section of pipeline is 250 ℃ to 400 ℃, and then cooling and forming through nitrogen gas cooling or water to obtain the composite co-extrusion layer;

in the step S3, the first waterproof layer, the first shielding layer and the second waterproof layer are sequentially coated on the outer side of the composite co-extrusion layer by a wrapping machine.

7. The method of manufacturing a floating multipurpose submarine cable according to claim 4, wherein:

in the step S4, extruding the first plastic protective layer outside the second water-blocking layer by using an extruding machine, wherein the temperature of the extruding machine from a machine body to a machine head is 130-220 ℃, after the first plastic protective layer is extruded, the first plastic protective layer enters a first section of cooling water tank for preliminary fixed forming, the temperature range of the first section of cooling water tank is 70-80 ℃, and then the first plastic protective layer enters a second section of cooling water tank for secondary cooling, and the temperature of the second section of cooling water tank is lower than 25 ℃;

in step S7, extruding the second plastic sheath layer out of the outer metal layer by using an extruding machine, wherein the temperature of the extruding machine from the machine body to the machine head is 130 ℃ to 220 ℃, after the second plastic sheath layer is extruded, the second plastic sheath layer enters a first section of cooling water tank for preliminary fixing and forming, the temperature range of the first section of cooling water tank is 70 ℃ to 80 ℃, and then the second plastic sheath layer enters a second section of cooling water tank for second-step cooling, and the temperature of the second section of cooling water tank is lower than 25 ℃.

8. The method of manufacturing a multi-purpose submarine cable according to claim 4, wherein:

in the step S5, a plastic extruding machine is matched with a gas injection machine, nitrogen is injected in the plastic extruding process to complete the extrusion of the foaming material, and the first foaming layer is obtained through water cooling;

in step S9, the extruding machine and the gas injection machine are matched, nitrogen is injected in the plastic extrusion process to complete the extrusion of the foaming material, and the second foaming layer is obtained through water cooling.

9. The method of manufacturing a floating multipurpose submarine cable according to claim 4, wherein:

in step S6, the range of the embossing depth is 0.5mm to 1.5mm, and each complete thread pitch is 25 to 35mm;

in the step S8, twisting the multiple sections of the split-phase wire cores and the light filler together by using a cabling machine and lapping and shaping the split-phase wire cores and the light filler by using a lapping tape, wherein the twisting pitch diameter ratio is 20-25, and the lapping and covering rate of the lapping tape is 30-45%.

10. The method of manufacturing a floating multipurpose submarine cable according to claim 4, wherein:

in step S10, longitudinally wrapping and pressing the insect-proof metal shielding layer on the outer side of the second foaming layer, wherein the edge of the insect-proof metal shielding layer is overlapped by 10mm to 20mm, and after the insect-proof metal shielding layer is wound, the material directly enters an extruding machine, and is extruded on the outer side of the insect-proof metal shielding layer to form the partially wrapped plastic protective layer;

in step S11, a 800-type large armoring machine is adopted to strand optical units and armoring materials on the outer side of the completely wrapped plastic sheath, and then a wrapping layer is wrapped on the outer side of the armoring layer by using a wrapping machine for tightening protection, wherein the strand pitch diameter ratio is 8-10, the wrapping pitch range of the wrapping layer is 200 mm-300 mm, and the diameter of the optical units is smaller than 10% of the diameter of the armoring materials.

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