CN115083666A - Offshore water-blocking power control optical fiber composite cable and manufacturing method and application thereof - Google Patents

Offshore water-blocking power control optical fiber composite cable and manufacturing method and application thereof Download PDF

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Publication number
CN115083666A
CN115083666A CN202210847579.XA CN202210847579A CN115083666A CN 115083666 A CN115083666 A CN 115083666A CN 202210847579 A CN202210847579 A CN 202210847579A CN 115083666 A CN115083666 A CN 115083666A
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Prior art keywords
water
blocking
optical fiber
unit
cable
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Chinese (zh)
Inventor
黄伟德
薛驰
梁斌
解向前
周佳龙
姜青松
程海涛
谢书鸿
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Zhongtian Technology Industrial Wire&cable System Co ltd
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Zhongtian Technology Industrial Wire&cable System Co ltd
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Priority to CN202210847579.XA priority Critical patent/CN115083666A/en
Publication of CN115083666A publication Critical patent/CN115083666A/en
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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
    • H01B7/28—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
    • 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
    • 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
    • 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
    • H01B13/06—Insulating conductors or cables
    • H01B13/14—Insulating conductors or cables by extrusion
    • 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
    • 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
    • H01B13/221—Sheathing; Armouring; Screening; Applying other protective layers filling-up interstices
    • 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
    • H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
    • 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
    • H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/22—Metal wires or tapes, e.g. made of steel
    • H01B7/228—Metal braid
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/2806—Protection against damage caused by corrosion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
    • H01B7/285—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable by completely or partially filling interstices in the cable
    • 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
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • 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
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/005—Power cables including optical transmission elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients

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  • Manufacturing & Machinery (AREA)
  • Insulated Conductors (AREA)

Abstract

The invention provides an offshore water-blocking power control optical fiber composite cable and a manufacturing method and application thereof, wherein the offshore water-blocking power control optical fiber composite cable comprises a cable core, a non-woven fabric polypropylene tape or non-woven fabric wrapped outside the cable core, an inner sheath extruded outside the non-woven fabric polypropylene tape or non-woven fabric, an armor structure layer coated outside the inner sheath and an outer sheath extruded outside the armor structure layer; the cable core is formed around central steel wire unit spiral transposition by many functional unit, and many between the functional unit and many it has low smoke and zero halogen PP rope and adopts the glue that blocks water to seal the clearance all to fill between functional unit and the central steel wire unit, wherein, many the functional unit includes a plurality of optical fiber transmission unit, many electric power unit and a plurality of the control unit. When the cable is applied to an offshore wind power station, water seepage prevention and corrosion prevention can be realized, and damage to the cable caused by a submarine high-pressure and high-corrosion environment is avoided.

Description

Offshore water-blocking power control optical fiber composite cable and manufacturing method and application thereof
Technical Field
The invention relates to an offshore water-blocking power control optical fiber composite cable and a manufacturing method and application thereof, belonging to the technical field of composite cables.
Background
In order to realize carbon peak-reaching carbon emission reduction, green power projects such as photovoltaic wind power energy storage and the like are widely popularized, wind power generation is developed firstly, and the development of wind power is limited to a great extent due to the limitation of unstable wind power and tense land. In order to break through the limitation of land, offshore wind power becomes a warping effect of wind power generation due to the fact that wind energy resources of offshore wind power are rich and do not conflict with land used, but the problems and difficulties of offshore wind power generation are brought, the most important point is that wind power is transmitted to a continental shelf safely and nondestructively for use, the wind power generation condition can be monitored in real time on the continental shelf, and a wind driven generator is controlled and operated.
The current cable product has the excellent characteristics in multiple aspects such as flame retardance, ultraviolet resistance and oxidation resistance, but even a water-proof cable only adopts waterproof and anti-corrosion insulating sheath materials, and does not perform waterproof treatment on other cable components which are easy to generate gaps such as conductors and shielding layers or only adopts multilayer reinforced armoring to protect a wire core, but the cost of the cable is too high at the moment; if the conventional cable product for transmitting electric energy is overhead on a rack and transmitted back to a continental shelf, the operation and recovery cost is inevitably increased greatly; the direct radiation on the sea bottom to transmit the electric energy back to the continental shelf also faces the problems of water seepage, water leakage and corrosion resistance of the cable under the long-term seawater erosion. Because the offshore wind power station is generally arranged on the sea level with rare occurrence, resident workers cannot realize the remote monitoring and control of the running condition of the wind power generator, the remote monitoring and control of the running condition of the wind power generator is also an inevitable choice, but the remote monitoring and control also faces the difficult problems of water resistance and corrosion resistance. Once water seepage and leakage happen, water branches can be generated on insulation, and finally, the conductor is punctured; even if breakdown does not occur, the conductor is oxidized due to the intrusion of moisture, and the resistance of the conductor increases with the passage of time, thereby increasing the electric power transmission loss and the heat generation of the cable, and finally generating a short circuit. Meanwhile, repairing the short circuit on the seabed is an extremely difficult project, so that the investment cost is high, the repair period is long, and the repair process is complex.
Therefore, it is an urgent technical problem in the art to provide a novel water-blocking optical fiber composite cable for offshore power control, a manufacturing method and applications thereof.
Disclosure of Invention
To solve the above-mentioned drawbacks and disadvantages, it is an object of the present invention to provide a water-blocking power control optical fiber composite cable for offshore use.
It is another object of the present invention to provide a method for making the above-described offshore water-blocking power control optical fiber composite cable.
It is also an object of the present invention to provide the use of the above-described offshore water-blocking power control optical fiber composite cable as a cable for transmitting electric power generated by an offshore wind power plant.
In order to achieve the above object, in one aspect, the present invention provides an offshore water-blocking power control optical fiber composite cable, wherein the offshore water-blocking power control optical fiber composite cable comprises a cable core, a non-woven fabric polypropylene tape or a non-woven fabric wrapped outside the cable core, an inner sheath extruded outside the non-woven fabric polypropylene tape or the non-woven fabric, an armor structure layer wrapped outside the inner sheath, and an outer sheath extruded outside the armor structure layer;
the cable core is formed around central steel wire unit spiral transposition by many functional unit, and many between the functional unit and many it has low smoke and zero halogen PP rope and adopts the glue that blocks water to seal the clearance all to fill between functional unit and the central steel wire unit, wherein, many the functional unit includes a plurality of optical fiber transmission unit, many electric power unit and a plurality of the control unit.
As a specific embodiment of the offshore water-blocking power control optical fiber composite cable according to the present invention, the central steel wire unit is formed by twisting a plurality of galvanized steel wires, and the gap is filled with a water-blocking glue.
As a specific embodiment of the above-mentioned offshore water-blocking power control optical fiber composite cable of the present invention, the galvanized steel wires have a diameter ranging from 0.558 mm to 6mm, a breaking strength greater than 1700MPa, and an elongation less than 12%.
As a specific embodiment of the offshore water-blocking power control optical fiber composite cable of the present invention, the optical fiber transmission unit includes a plurality of optical fibers and a non-woven polypropylene tape covering the plurality of optical fibers, and water-blocking glue is filled between the plurality of optical fibers and between the optical fibers and the non-woven polypropylene tape.
As a specific embodiment of the above-mentioned offshore water-blocking power control optical fiber composite cable of the present invention, the power unit includes a power unit cable core and a polyolefin insulation layer covering the power unit cable core, and water-blocking glue is filled in an inner gap of the power unit cable core and a gap between the power unit cable core and the polyolefin insulation layer, wherein the power unit cable core is formed by a plurality of conductor harness wires;
the outer surfaces of the conductor wires are also coated with water-blocking glue.
In the invention, the polyolefin insulating layer is made of polyolefin which is cross-linked polyolefin, the tensile strength is more than 8MPa, the elongation is more than 180%, and the Shore hardness is not more than 95A.
As a specific embodiment of the above offshore water-blocking power control optical fiber composite cable of the present invention, the control unit comprises a control unit cable core, a non-woven fabric polypropylene tape and a copper-plastic composite tape sequentially coated outside the control unit cable core, and a low-smoke halogen-free flame retardant polyolefin sheath layer extruded outside the copper-plastic composite tape;
wherein, the control unit cable core is formed by many the transposition of control unit sinle silk, just the control unit sinle silk include by the sinle silk that many conductor pencil silk formed and the cladding in non-woven fabrics polypropylene strip outside the sinle silk, and the gap between many the control unit sinle silks and the non-woven fabrics polypropylene strip all pack and have low smoke and zero halogen PP rope and adopt the glue that blocks water to seal up the clearance.
In the invention, the low-smoke halogen-free flame-retardant polyolefin sheath layer is made of low-smoke halogen-free flame-retardant polyolefin which is cross-linked polyolefin, the tensile strength is more than 8MPa, the elongation is more than 180%, and the Shore hardness is not more than 95A.
In the invention, the copper-plastic composite belt can realize the shielding function.
The low-smoke halogen-free PP rope has flame retardant performance, the breaking strength is greater than 370N, the oxygen index is greater than 26, the pH weighted value is greater than 4.3, the conductivity is less than 10 mu m/mm, the smoke density is less than 100, and the Shore hardness is 80-90A.
The low-smoke halogen-free PP rope used by the invention has the following advantages:
1) the packaging bag has good softness, and other units cannot be damaged even if relative movement is carried out during filling;
2) the weather resistance is good, and the temperature resistance range is-30 ℃ to 105 ℃;
3) the tensile strength is higher than that of the common PVC electric wire;
4) the water-blocking glue has non-moving property, namely, the property of the water-blocking glue can not be changed when the gap is sealed by the water-blocking glue;
5) has extremely high volume resistivity;
6) the high-voltage resistant performance is relatively good;
7) has better elasticity and viscosity;
8) the material composition is more green and environment-friendly, and no black smoke is generated during combustion.
As a specific embodiment of the above-mentioned offshore water-blocking power control optical fiber composite cable of the present invention, the inner sheath and the outer sheath are both made of black mildew-proof polyurethane.
In the invention, the black mildew-proof polyurethane is prepared by taking mildew-proof polyether type thermoplastic polyurethane elastomer TPU as a main raw material, and 2-4 parts by weight of black color master batch and 0.5-0.8 part by weight of organic mildew preventive can be added into every hundred parts by weight of TPU in the preparation process;
the intensity of the mildew-proof polyether type thermoplastic polyurethane elastomer TPU is more than 20MPa, the elongation is more than 500%, and the Shore hardness is not more than 80A.
In some embodiments of the present invention, the organic mold inhibitor may be used, for example, in an amount of 0.5 parts by weight, and the organic mold inhibitor may be, for example, DOCIT and/or proparagyl.
As a specific embodiment of the above-mentioned offshore water-blocking power control optical fiber composite cable according to the present invention, the armor structure layer is formed by braiding galvanized steel wires, and a water-blocking glue sealing layer is coated outside the armor structure layer.
As a specific embodiment of the above-mentioned offshore water-blocking power control optical fiber composite cable of the present invention, the galvanized steel wires have a diameter ranging from 0.558 mm to 6mm, a breaking strength greater than 1700MPa, and an elongation less than 12%.
In the invention, the non-woven polypropylene tape (non-woven CPP tape) has higher surface roughness, so that the water-blocking adhesive can be better combined with each element.
As a specific embodiment of the offshore water-blocking power control optical fiber composite cable, the non-woven fabric CPP tape has a tensile strength of more than 250N/25mm, an elongation at break of more than 90%, a shrinkage rate of less than 7%, and a volume resistivity of more than 1x10 14 Ω·m。
In the invention, the water-blocking glue is a conventional substance. For example, in some embodiments of the present invention, the main component of the water-blocking glue used is butyl acrylate, the weight content of butyl acrylate is approximately 45-48%, the solidification temperature of the water-blocking glue is 23 ℃, the humidity of the solidification environment is 65%, and the viscosity of the water-blocking glue is 9000-12000 cps.
In another aspect, the present invention provides a method for manufacturing the above-mentioned offshore water-blocking power control optical fiber composite cable, wherein the method comprises:
(1) enabling a plurality of functional units to be spirally twisted around a central steel wire unit, filling low-smoke halogen-free PP ropes among the functional units and the central steel wire unit, and sealing gaps by adopting water-blocking glue to obtain cable cores;
the plurality of functional units comprise a plurality of optical fiber transmission units, a plurality of power units and a plurality of control units;
(2) wrapping a non-woven polypropylene belt or non-woven fabric outside the cable core;
(3) extruding the inner sheath outside the non-woven fabric polypropylene belt or the non-woven fabric;
(4) coating an armor structure layer outside the inner sheath to strengthen external protection;
(5) and extruding the outer sheath outside the armor structure layer to obtain the offshore water-blocking power control optical fiber composite cable.
As a specific embodiment of the above manufacturing method of the present invention, the manufacturing method of the center wire unit includes:
stranding a plurality of galvanized steel wires, and filling water-blocking glue in gaps to obtain a central steel wire unit; wherein the pitch diameter ratio of the stranding is less than or equal to 8.
As a specific embodiment of the above manufacturing method of the present invention, the manufacturing method of the optical fiber transmission unit includes:
stranding a plurality of optical fibers, filling gaps among the optical fibers with water-blocking glue in the stranding process, fixing the optical fibers by using a non-woven fabric polypropylene tape, and obtaining the optical fiber transmission unit after the water-blocking glue is solidified and molded; wherein the twisted pitch-diameter ratio is 25-30.
As a specific embodiment of the above manufacturing method of the present invention, the manufacturing method of the power unit includes:
and bundling a plurality of conductor wires, filling gaps among the conductor wires with water-blocking glue in the bundling process, then coating a polyolefin insulating layer outside the obtained power unit cable core, filling the gaps between the power unit cable core and the polyolefin insulating layer with water-blocking glue, and obtaining the power unit after the water-blocking glue is solidified and molded.
As a specific embodiment of the above manufacturing method of the present invention, the manufacturing method of the power unit further includes:
coating water-blocking glue on the outer surfaces of the conductor wires, and bundling the conductor wires after the water-blocking glue is solidified and molded; wherein the pitch-diameter ratio of the bunched yarn is 25-30.
As a specific embodiment of the above manufacturing method of the present invention, the manufacturing method of the control unit includes:
bundling a plurality of conductor wires, and coating a non-woven fabric polypropylene tape outside the obtained fiber core to obtain a control unit wire core; and then twisting a plurality of control unit wire cores, filling a low-smoke halogen-free PP rope in the twisting process, sealing gaps among the control unit wire cores by adopting a water-blocking glue, fixing the obtained structure by sequentially passing through a non-woven fabric polypropylene belt and a copper-plastic composite belt, and extruding a low-smoke halogen-free flame-retardant polyolefin sheath layer outside the copper-plastic composite belt after the water-blocking glue is solidified to form the control unit.
As a specific embodiment of the above manufacturing method of the present invention, the manufacturing method further includes: adopting galvanized steel wires to weave an armor structure layer outside the inner sheath, coating water-blocking glue outside the armor structure layer, forming a water-blocking glue sealing layer after the water-blocking glue is solidified, and extruding the outer sheath outside the water-blocking glue sealing layer to obtain the offshore water-blocking power control optical fiber composite cable.
In yet another aspect, the present invention provides an application of the above-mentioned offshore water-blocking power control optical fiber composite cable, which can be used in humid, high-temperature, and moldy places or in scenes such as offshore wind power stations, offshore platforms and the like with high requirements on physical strength, air tightness and corrosion resistance of the cable. For example, the offshore water-blocking power control optical fiber composite cable may be used as a cable for transmitting power generated by an offshore wind power plant.
Compared with the prior art, the beneficial technical effects which can be achieved by the invention comprise:
the outer sheath of the offshore water-blocking power control optical fiber composite cable is made of black mildew-proof polyurethane, so that the mildew-proof performance of the cable is enhanced, and the physical properties such as tensile strength, elongation at break, wear resistance and the like of the cable are improved; when the cable is used as a cable for transmitting electric energy generated by an offshore wind power station, water seepage and water leakage of the cable can be avoided, and meanwhile, the weather resistance of the cable can be enhanced, so that the service life of the cable is prolonged;
the offshore water-blocking power control optical fiber composite cable is characterized in that water-blocking glue is filled in each functional unit, among the functional units and the like of the offshore water-blocking power control optical fiber composite cable to form a closed structure; when the cable is used as a cable for transmitting electric energy generated by an offshore wind power station, environmental corrosive substances such as seawater and salt mist can be prevented from invading the cable;
the central steel wire unit of the offshore water-blocking power control optical fiber composite cable is formed by twisting a plurality of galvanized steel wires, and the armor structure layer woven by the galvanized steel wires is arranged outside the inner sheath, so that the mechanical structure strength of the cable is enhanced, the transverse tensile strength and the longitudinal sudden impact strength are excellent, and the cable can be well prevented from being damaged; in addition, the optical fiber is wrapped in a structure with high mechanical strength (namely, the central steel wire unit is arranged, the inner sheath and the outer sheath which are made of black mildew-proof polyurethane materials and the functional units are symmetrically arranged), so that the condition that the core is broken due to the fact that the optical fiber is not protected by the central steel wire unit and the pulling deformation exceeds the threshold value of the optical fiber is easily caused in the cable stretching process can be avoided, and the safety of the optical fiber can be better protected.
In conclusion, the offshore water-blocking power control optical fiber composite cable is comprehensively designed to be waterproof, has a unique water-seepage-proof structure, and is provided with the black mildew-proof polyurethane outer sheath, so that when the cable is applied to an offshore wind power station, water seepage prevention and corrosion prevention can be realized, the damage to the cable caused by a submarine high-pressure and high-corrosion environment can be avoided, and a series of losses and complex and expensive repairing work caused by water seepage can be avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an offshore water-blocking power control optical fiber composite cable provided in embodiment 1 of the present invention.
The main reference numbers illustrate:
11. an optical fiber;
12. a first water-blocking glue;
13. first non-woven fabric CPP belt
21. Galvanized steel wire;
22. a second water-blocking glue;
31. a first conductor line;
32. third water-blocking glue;
33. a low smoke halogen-free polyolefin insulation layer;
41. a second conductor line;
42. a second non-woven fabric CPP tape;
43. a first low smoke zero halogen PP cord;
44. a third non-woven fabric CPP tape;
45. a copper-plastic composite tape;
46. a low-smoke halogen-free flame-retardant polyolefin sheath layer;
51. a second low smoke halogen-free PP rope;
52. a fourth non-woven fabric CPP tape;
53. an inner sheath;
54. an armor layer;
55. an outer sheath;
56. and (4) a water-blocking glue sealing layer.
Detailed Description
It should be noted that the term "comprises/comprising" and any variations thereof in the description and claims of this invention and the above-described drawings is intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the present invention, the terms "upper", "lower", "inner", "outer", "middle", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used in other meanings besides orientation or positional relationship, for example, the term "upper" may also be used in some cases to indicate a certain attaching or connecting relationship. The specific meanings of these terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
Furthermore, the terms "disposed" and "connected" should be interpreted broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.
The "ranges" disclosed herein are given as lower and upper limits. There may be one or more lower limits, and one or more upper limits, respectively. The given range is defined by the selection of a lower limit and an upper limit. The selected lower and upper limits define the boundaries of the particular range. All ranges defined in this manner are combinable, i.e., any lower limit can be combined with any upper limit to form a range. For example, ranges of 60-120 and 80-110 are listed for particular parameters, with the understanding that ranges of 60-110 and 80-120 are also contemplated. Further, if the minimum range values listed are 1 and 2 and the maximum range values listed are 3, 4, and 5, then the following ranges are all contemplated: 1-3, 1-4, 1-5, 2-3, 2-4, and 2-5.
In the present invention, unless otherwise stated, the numerical range "a-b" represents a shorthand representation of any combination of real numbers between a and b, where a and b are both real numbers. For example, a numerical range of "0 to 5" indicates that all real numbers between "0 to 5" have been listed throughout this disclosure, and "0 to 5" is only a shorthand representation of the combination of these numbers.
In the present invention, all the embodiments and preferred embodiments mentioned in the present invention may be combined with each other to form a new technical solution, if not specifically stated.
In the present invention, all the technical features mentioned in the present invention and preferred features may be combined with each other to form a new technical solution, if not specifically stated.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. The following described embodiments are some, but not all embodiments of the present invention, and are merely illustrative of the present invention and should not be construed as limiting the scope of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention. The examples, in which specific conditions are not specified, were carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1
The present embodiment provides a water-blocking optical fiber composite cable for offshore power control, which is schematically shown in fig. 1, and as can be seen from fig. 1, the water-blocking optical fiber composite cable for offshore power control comprises:
the cable comprises a cable core, a fourth non-woven fabric polypropylene tape (fourth non-woven fabric CPP tape) 52 wrapped outside the cable core, an inner sheath 53 extruded outside the non-woven fabric polypropylene tape 52, an armor structure layer 54 wrapped outside the inner sheath 53 and an outer sheath 55 extruded outside the armor structure layer 54;
the cable core is formed by spirally twisting six functional units around a central steel wire unit, second low-smoke halogen-free PP ropes 51 are filled among the six functional units and among a plurality of functional units and the central steel wire unit, and sixth water-blocking glue is adopted to seal gaps, wherein the six functional units comprise an optical fiber transmission unit, four power units and a control unit;
the optical fiber transmission unit comprises two optical fibers 11 and a first non-woven polypropylene belt 13 coated outside the two optical fibers 11, and first water-blocking glue 12 is filled between the two optical fibers 11 and between the optical fibers 11 and the first non-woven polypropylene belt 13;
the central steel wire unit is formed by twisting a plurality of galvanized steel wires 21, and second water-blocking glue 22 is filled in gaps; wherein the diameter range of the galvanized steel wire is 0.558-6mm, the breaking strength is more than 1700MPa, and the elongation is less than 12%;
the power unit comprises a power unit cable core and a low-smoke halogen-free polyolefin insulation layer 33 coated outside the power unit cable core, and third water-blocking glue 32 is filled in an inner gap of the power unit cable core and a gap between the power unit cable core and the low-smoke halogen-free polyolefin insulation layer 33, wherein the power unit cable core is formed by a plurality of first conductor wires 31, a fourth water-blocking glue is coated on the outer surface of each of the plurality of first conductor wires 31, and the first conductor wires 31 are 5-type bare copper soft conductor wires;
the control unit comprises a control unit cable core, a third non-woven fabric polypropylene tape (third non-woven fabric CPP tape) 44 and a copper-plastic composite tape 45 which are sequentially coated outside the control unit cable core, and a low-smoke halogen-free flame-retardant polyolefin sheath layer 46 which is extruded outside the copper-plastic composite tape 45;
wherein, the control unit cable core is formed by three the transposition of the control unit sinle silk, just the control unit sinle silk includes by 41 bunches of wires of many second conductor line sinle silk and the cladding in the outer second non-woven fabrics polypropylene tape (second non-woven fabrics CPP area) 42 of sinle silk, and the gap between three the control unit sinle silks and the second non-woven fabrics CPP area 42 all pack has first low smoke and zero halogen PP rope 43 and adopts the fifth to block water and glue the seal gap, wherein, second conductor line 41 also is 5 types of naked copper soft conductor line.
In the embodiment, the thickness of the inner sheath 53 and the thickness of the outer sheath 55 are both 1.4mm, the materials of the inner sheath and the outer sheath are both black mildew-proof polyurethane, the black mildew-proof polyurethane is prepared by taking mildew-proof polyether type thermoplastic polyurethane elastomer TPU as a main raw material, and 2-4 parts by weight of black color masterbatch and 0.5 part by weight of organic mildew preventive can be added into each hundred parts by weight of TPU in the preparation process;
wherein the strength of the mildew-proof polyether type thermoplastic polyurethane elastomer TPU is more than 20MPa, the elongation is more than 500%, and the Shore hardness is not more than 80A;
the organic mold inhibitor may be, for example, DOCIT and proparagyl.
In this embodiment, the armor structure layer 54 is woven by galvanized steel wires, and a water-blocking glue sealing layer 56 (a seventh water-blocking glue is correspondingly used as a material) is coated outside the armor structure layer 54, and the galvanized steel wires have a diameter range of 0.558-6mm, a breaking strength greater than 1700MPa, and an elongation less than 12%.
In this embodiment, the tensile strength of the first non-woven fabric CPP tape, the second non-woven fabric CPP tape, the third non-woven fabric CPP tape and the fourth non-woven fabric CPP tape is greater than 250N/25mm, the elongation at break is greater than 90%, the shrinkage rate is less than 7%, and the volume resistivity is greater than 1x10 14 Omega.m; the non-woven polypropylene tapes (non-woven CPP tapes) have higher surface roughness, so that the water-blocking adhesive can be better combined with each element.
In the embodiment, the main components of the first water-blocking glue to the seventh water-blocking glue are butyl acrylate, the weight content of the butyl acrylate is approximately 45-48%, the solidification temperature of the water-blocking glue is 23 ℃, the humidity of the solidification environment is 65%, and the viscosity of the water-blocking glue is 9000-12000 cps.
In this embodiment, the low-smoke halogen-free polyolefin insulating layer 33 and the low-smoke halogen-free flame-retardant polyolefin sheath layer 46 are both made of cross-linked polyolefin, the tensile strength is greater than 8MPa, the elongation is greater than 180%, and the shore hardness is not more than 95A.
In this embodiment, the first and second low-smoke halogen- free PP ropes 43 and 51 have flame retardant properties, the breaking strength is greater than 370N, the oxygen index is greater than 26, the pH value is greater than 4.3, the conductivity is less than 10 μm/mm, the smoke density is less than 100, and the shore hardness is 80-90.
In the offshore water-blocking power control optical fiber composite cable provided by the embodiment, the power unit relates to the combination of multi-phase electric transmission and a zero line, and can meet the scene of using most offshore electric energy, so that four power units are enough; the optical fiber transmission unit realizes the transmission function through optical signals, and the control unit realizes the transmission function through electric signals. Of course, the number of the power units, the optical fiber transmission units and the control units is not limited to this, and the number thereof may be set reasonably according to actual operation needs.
In this embodiment, the optical fiber transmission unit and the control unit are arranged at the middle symmetrical positions of the four power units, so that the extrusion forces of the power units on the two sides on the optical fiber transmission unit and the control unit are more uniform, and the damage of the optical fiber transmission unit or the control unit caused by asymmetric extrusion stress can be avoided. Meanwhile, the control unit cable core is formed by twisting the three control unit cable cores, so that the process of separate shielding can be reduced, and the overall shielding of the control signals can be realized only by one-time total shielding.
The offshore water-blocking power control optical fiber composite cable provided by the embodiment is prepared by adopting a manufacturing method comprising the following specific steps of:
1) manufacturing a central steel wire unit:
stranding a plurality of galvanized steel wires, and filling a second water-blocking glue in the gap to obtain a central steel wire unit; wherein the pitch diameter ratio of the stranding is less than or equal to 8;
2) manufacturing an optical fiber transmission unit:
stranding two optical fibers, filling gaps between the optical fibers with first water-blocking glue in a stranding process, fixing the optical fibers with a first non-woven polypropylene tape, and obtaining an optical fiber transmission unit after the first water-blocking glue is solidified and molded; wherein the twisted pitch-diameter ratio is 25-30;
3) manufacturing the power unit:
coating fourth water-blocking glue on the outer surfaces of the first conductor wires, enabling the first conductor wires to be subjected to wire bundling after the fourth water-blocking glue is solidified and formed, filling gaps among the first conductor wires with the third water-blocking glue in the wire bundling process, covering a polyolefin insulating layer outside an obtained power unit cable core, filling the gaps between the power unit cable core and the polyolefin insulating layer with the third water-blocking glue, and obtaining the power unit after the water-blocking glue is solidified and formed;
wherein the pitch-diameter ratio of the binding wires is 25-30;
4) manufacturing a control unit:
bundling a plurality of second conductor wires, and then coating a second non-woven fabric polypropylene tape outside the obtained fiber core to obtain a control unit wire core; stranding the three control unit wire cores, filling gaps among the control unit wire cores with a first low-smoke halogen-free PP rope in the stranding process to achieve circle filling, sealing the gaps with a fifth water-blocking glue, fixing the obtained structure sequentially through a third non-woven fabric polypropylene belt and a copper-plastic composite belt, and extruding and wrapping a low-smoke halogen-free flame-retardant polyolefin sheath layer outside the copper-plastic composite belt after the fifth water-blocking glue is solidified and formed to obtain the control unit;
5) manufacturing the offshore water-blocking power control optical fiber composite cable:
enabling six functional units to be spirally twisted around a central steel wire unit, filling second low-smoke halogen-free PP ropes between the six functional units and the central steel wire unit to achieve circle filling, and then sealing gaps by adopting sixth water-blocking glue to obtain a cable core;
the six functional units comprise an optical fiber transmission unit, four power units and a control unit;
wrapping a fourth non-woven polypropylene belt outside the cable core;
extruding an inner sheath outside the fourth non-woven fabric polypropylene belt;
a galvanized steel wire is adopted to weave an armor structure layer outside the inner sheath so as to strengthen external protection; coating a seventh water-blocking adhesive outside the armor structure layer, and forming a water-blocking adhesive sealing layer after the seventh water-blocking adhesive is solidified;
and then extruding the outer sheath outside the water-blocking glue sealing layer to obtain the offshore water-blocking power control optical fiber composite cable.
Comparative example 1
This comparative example provides an offshore water-blocking power control optical fiber composite cable that differs from the offshore water-blocking power control optical fiber composite cable provided in example 1 only in that:
1) the first to seventh water-blocking glues were not used;
2) the armor layer and the central steel wire unit are not arranged.
Comparative example 2
This comparative example provides an offshore water-blocking power control optical fiber composite cable that differs from the offshore water-blocking power control optical fiber composite cable provided in example 1 only in that:
1) the inner sheath and the outer sheath are both polyvinyl chloride sheaths;
2) the first low-smoke halogen-free PP rope and the second low-smoke halogen-free PP rope are not filled;
3) the first to seventh water-blocking glues were not used.
Comparative example 3
This comparative example provides an offshore water-blocking power control optical fiber composite cable that differs from the offshore water-blocking power control optical fiber composite cable provided in example 1 only in that:
1) the first low-smoke halogen-free PP rope and the second low-smoke halogen-free PP rope are not filled;
2) the first to seventh water-blocking glues were not used;
3) the armor layer and the central steel wire unit are not arranged.
Comparative example 4
This comparative example provides an offshore water-blocking power control optical fiber composite cable that differs from the offshore water-blocking power control optical fiber composite cable provided in example 1 only in that:
1) the inner sheath and the outer sheath are low-smoke halogen-free polyolefin sheaths with the thickness of 1.2mm respectively;
2) the first low-smoke halogen-free PP rope and the second low-smoke halogen-free PP rope are not filled;
3) the first to seventh water-blocking glues were not used;
4) the armor layer and the central steel wire unit are not arranged.
Test example 1
The present test example separately tested the air-tightness of the offshore water-blocking power control optical fiber composite cables provided in example 1 and comparative examples 1 to 4, the physical properties, resistance and mildew resistance of the outer jacket in each cable, the integrity of the optical fiber transmission unit in each cable, and the like, using conventional methods existing in the art, and the test results are shown in tables 1 to 5 below.
TABLE 1
Figure BDA0003753518290000131
As can be seen from table 1, the outer sheaths in comparative examples 2 and 4 are respectively made of polyvinyl chloride and low-smoke halogen-free polyolefin, and compared with the black mildewproof polyurethane outer sheath material used in example 1, the tensile strength and the elongation at break of the black mildewproof polyurethane outer sheath material are both obviously reduced, which indicates that the physical properties of the black mildewproof polyurethane used in the invention are superior to those of the existing conventional sheath materials such as polyvinyl chloride, low-smoke halogen-free polyolefin and the like.
TABLE 2
Figure BDA0003753518290000132
Figure BDA0003753518290000141
As can be seen from table 2 above, compared with the outer sheath materials such as polyvinyl chloride and low smoke zero halogen polyolefin respectively used in comparative examples 2 and 4, the black mildewproof polyurethane outer sheath material used in the present invention has more excellent physical properties.
TABLE 3
Figure BDA0003753518290000142
Wherein, the mildew resistance performance is tested for 28 days by seven moulds (aspergillus niger, aspergillus terreus, paecilomyces variotii, penicillium funiculosum, penicillium ochrochloron, procymidone and trichoderma viride), the test humidity is more than 90 percent RH, and the temperature is 30 ℃.
As can be seen from table 3, the outer sheaths of the offshore water-blocking power control optical fiber composite cables provided by the embodiment 1, the comparative example 1 and the comparative example 3 are all made of black mildew-proof polyurethane, and the outer sheaths of the cables have good mildew-proof effects; and the outer sheaths of the offshore water-blocking power control optical fiber composite cables provided by the comparative examples 2 and 4 are respectively made of polyvinyl chloride and low-smoke halogen-free polyolefin, so that the outer sheaths of the two cables have poor mildew-proof effect.
TABLE 4
Figure BDA0003753518290000143
The test of the integrity performance of the optical fiber in the optical fiber transmission unit specifically comprises the following steps: and performing loop attenuation test on the optical fiber, namely inputting an optical signal from one end of the optical fiber and detecting the intensity of the optical signal from the other end of the optical fiber. For normal fibers, i.e., an unbroken length of fiber, the attenuation value is detectable in the attenuation range of 0.22-4dB, but for broken fibers, the optical signal of the path cannot be detected.
As can be seen from table 4, the offshore water-blocking power control optical fiber composite cables provided in example 1 and comparative example 2 of the present invention are both provided with the armor layer and the central steel wire unit, and the optical fibers in these cables are kept intact, which indicates that the arrangement of these structures can avoid the situation that the optical fibers are very easily broken due to pulling deformation exceeding their threshold value without the protection of the central steel wire unit and the armor layer during the cable stretching process, so as to better protect the safety of the optical fibers; for the offshore water-blocking power control optical fiber composite cables provided by comparative examples 1 and 3-4, which are not provided with the armor layer and the central steel wire unit, the optical fibers in the cables have broken cores due to the lack of protection of the armor layer and the central steel wire unit.
TABLE 5
Figure BDA0003753518290000151
As can be seen from table 5 above, the offshore water-blocking power control optical fiber composite cable provided in example 1 of the present invention is filled with low-smoke halogen-free PP ropes and the gaps/seams are sealed with the water-blocking glue, and a cable sample with a length of 0.5m is placed continuously for 5s under 0.3kPa, and the pressure thereof is greater than 0.2kPa, which indicates that the cable sample has excellent air tightness; the offshore water-blocking power control optical fiber composite cable provided by the comparative example 1 is filled with the low-smoke halogen-free PP rope but does not adopt the water-blocking glue to seal gaps/gaps, a cable sample with the length of 0.5m is continuously placed for 5s under 0.3kPa, and the pressure is greater than 0.15kPa, which shows that the cable also has certain air tightness, but the air tightness is inferior to that of the cable provided by the example 1; the offshore water-blocking power control optical fiber composite cables provided by comparative examples 2-4 are not filled with low-smoke halogen-free PP ropes, nor are water-blocking glue used for sealing gaps/gaps, and the cable samples with the length of 0.5m are continuously placed for 5s under 0.3kPa, and the pressure is less than 0.1kPa, which shows that the cable samples are very poor in air tightness and basically have no air tightness. Therefore, the offshore water-blocking power control optical fiber composite cable is filled with the low-smoke halogen-free PP rope, and the gap/gap is sealed by the water-blocking glue, so that the air tightness of the whole structure of the cable can be ensured, and the oil gas is prevented from flowing backwards into the cable to cause corrosion.
In conclusion, the outer sheath of the offshore water-blocking power control optical fiber composite cable provided by the embodiment of the invention is made of black mildew-proof polyurethane, so that the mildew-proof performance of the cable is enhanced, and the physical properties such as tensile strength, elongation at break, wear resistance and the like of the cable are improved; when the cable is used as a cable for transmitting electric energy generated by an offshore wind power station, water seepage and water leakage of the cable can be avoided, and meanwhile, the weather resistance of the cable can be enhanced, so that the service life of the cable is prolonged;
according to the embodiment of the invention, the water-blocking glue is filled in each functional unit, between the functional units and the like of the offshore water-blocking power control optical fiber composite cable to form a closed structure; when the cable is used as a cable for transmitting electric energy generated by an offshore wind power station, environmental corrosive substances such as seawater and salt mist can be prevented from invading the cable;
the central steel wire unit of the offshore water-blocking power control optical fiber composite cable is formed by twisting a plurality of galvanized steel wires, and the armor structure layer woven by the galvanized steel wires is arranged outside the inner sheath, so that the mechanical structure strength of the cable is enhanced, the transverse tensile strength and the longitudinal sudden impact strength are excellent, and the cable can be well prevented from being damaged; in addition, the optical fiber is wrapped in a structure with high mechanical strength (namely, the central steel wire unit is arranged, the inner sheath and the outer sheath which are made of black mildew-proof polyurethane materials and the functional units are symmetrically arranged), so that the condition that the core is broken due to the fact that the optical fiber is not protected by the central steel wire unit and the pulling deformation exceeds the threshold value of the optical fiber is easily caused in the cable stretching process can be avoided, and the safety of the optical fiber can be better protected.
Therefore, the embodiment of the invention carries out comprehensive waterproof design on the offshore water-blocking power control optical fiber composite cable, has a unique waterproof structure, and simultaneously uses the black mildew-proof polyurethane outer sheath, so that when the cable is applied to an offshore wind power station, water seepage prevention and corrosion prevention can be realized, the damage to the cable caused by submarine high-pressure and high-corrosion environment can be avoided, and a series of losses and complex and expensive repairing work caused by water seepage can be avoided.
The above description is only exemplary of the invention and should not be taken as limiting the scope of the invention, so that the invention is intended to cover all modifications and equivalents of the embodiments described herein. In addition, the technical features and the technical inventions of the present invention, the technical features and the technical inventions, and the technical inventions can be freely combined and used.

Claims (10)

1. The offshore water-blocking power control optical fiber composite cable is characterized by comprising a cable core, a non-woven fabric polypropylene tape or a non-woven fabric wrapped outside the cable core, an inner sheath extruded outside the non-woven fabric polypropylene tape or the non-woven fabric, an armor structure layer coated outside the inner sheath and an outer sheath extruded outside the armor structure layer;
the cable core is formed around central steel wire unit spiral transposition by many functional unit, and many between the functional unit and many it has low smoke and zero halogen PP rope and adopts the glue that blocks water to seal the clearance all to fill between functional unit and the central steel wire unit, wherein, many the functional unit includes a plurality of optical fiber transmission unit, many electric power unit and a plurality of the control unit.
2. The offshore water-blocking power control optical fiber composite cable of claim 1, wherein the center wire unit is formed by twisting a plurality of galvanized steel wires, and the gaps are filled with a water-blocking glue.
3. An offshore water-blocking power control optical fiber composite cable according to claim 1 or 2, wherein the optical fiber transmission unit comprises a plurality of optical fibers and a non-woven polypropylene tape wrapped outside the plurality of optical fibers, and water-blocking glue is filled between the plurality of optical fibers and between the optical fibers and the non-woven polypropylene tape.
4. An offshore water-blocking power control optical fiber composite cable according to claim 1 or 2, wherein the power unit comprises a power unit cable core and a polyolefin insulation layer coated outside the power unit cable core, and water-blocking glue is filled in an inner gap of the power unit cable core and a gap between the power unit cable core and the polyolefin insulation layer, wherein the power unit cable core is formed by a plurality of conductor harness wires;
the outer surfaces of the conductor wires are also coated with water-blocking glue.
5. An offshore water-blocking power control optical fiber composite cable as claimed in claim 1 or 2, wherein the control unit comprises a control unit cable core, a non-woven polypropylene tape and a copper-plastic composite tape which are sequentially coated outside the control unit cable core, and a low-smoke halogen-free flame-retardant polyolefin sheath layer extruded outside the copper-plastic composite tape;
wherein, the control unit cable core is formed by many the transposition of control unit sinle silk, just the control unit sinle silk include by the sinle silk that many conductor pencil silk formed and the cladding in non-woven fabrics polypropylene strip outside the sinle silk, and the gap between many the control unit sinle silks and the non-woven fabrics polypropylene strip all pack and have low smoke and zero halogen PP rope and adopt the glue that blocks water to seal up the clearance.
6. An offshore water-blocking power control optical fiber composite cable as claimed in claim 1 or 2, wherein the inner sheath and the outer sheath are both made of black mildewproof polyurethane.
7. An offshore water-blocking power control optical fiber composite cable as claimed in claim 1 or 2, wherein the armor layer is woven from galvanized steel wires and a water-blocking glue sealing layer is coated outside the armor layer.
8. A method of making an offshore water-blocking power control fiber optic composite cable of any of claims 1-7, comprising:
(1) enabling a plurality of functional units to be spirally stranded around a central steel wire unit, filling low-smoke halogen-free PP ropes between the functional units and the central steel wire unit, and sealing gaps by adopting water-blocking glue to obtain a cable core;
the plurality of functional units comprise a plurality of optical fiber transmission units, a plurality of power units and a plurality of control units;
(2) wrapping a non-woven polypropylene belt or non-woven fabric outside the cable core;
(3) extruding the inner sheath outside the non-woven fabric polypropylene belt or the non-woven fabric;
(4) coating an armor structure layer outside the inner sheath to strengthen external protection;
(5) and extruding the outer sheath outside the armor structure layer to obtain the offshore water-blocking power control optical fiber composite cable.
9. The method of manufacturing of claim 8, wherein the method of manufacturing the center wire unit comprises:
stranding a plurality of galvanized steel wires, and filling water-blocking glue in gaps to obtain a central steel wire unit; wherein the twisted pitch-diameter ratio is less than or equal to 8;
the manufacturing method of the optical fiber transmission unit comprises the following steps:
stranding a plurality of optical fibers, filling gaps among the optical fibers with water-blocking glue in the stranding process, fixing the optical fibers by using a non-woven fabric polypropylene tape, and obtaining the optical fiber transmission unit after the water-blocking glue is solidified and molded; wherein the twisted pitch-diameter ratio is 25-30;
the manufacturing method of the power unit comprises the following steps:
bundling a plurality of conductor wires, filling gaps among the conductor wires with water-blocking glue in the bundling process, then coating a polyolefin insulating layer outside the obtained power unit cable core, filling the gaps between the power unit cable core and the polyolefin insulating layer with water-blocking glue, and obtaining the power unit after the water-blocking glue is solidified and molded;
the manufacturing method of the power unit further comprises the following steps:
coating water-blocking glue on the outer surfaces of the conductor wires, and bundling the conductor wires after the water-blocking glue is solidified and molded; wherein the pitch-diameter ratio of the binding wires is 25-30;
the manufacturing method of the control unit comprises the following steps:
bundling a plurality of conductor wires, and coating a non-woven fabric polypropylene tape outside the obtained fiber core to obtain a control unit wire core; stranding a plurality of control unit wire cores, filling gaps among the control unit wire cores with low-smoke halogen-free PP ropes in the stranding process, sealing the gaps with water-blocking glue, fixing the obtained structure through a non-woven fabric polypropylene belt and a copper-plastic composite belt in sequence, and extruding a low-smoke halogen-free flame-retardant polyolefin sheath layer outside the copper-plastic composite belt after the water-blocking glue is solidified and formed to obtain the control unit;
the manufacturing method further comprises the following steps: adopting galvanized steel wires to weave an armor structure layer outside the inner sheath, coating water-blocking glue outside the armor structure layer, forming a water-blocking glue sealing layer after the water-blocking glue is solidified, and extruding the outer sheath outside the water-blocking glue sealing layer to obtain the offshore water-blocking power control optical fiber composite cable.
10. Use of an offshore water-blocking power control optical fibre composite cable according to any one of claims 1-7 as a cable for transmitting electrical power generated by an offshore wind power plant.
CN202210847579.XA 2022-07-19 2022-07-19 Offshore water-blocking power control optical fiber composite cable and manufacturing method and application thereof Pending CN115083666A (en)

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