CN216902381U - 220kV crosslinked polyethylene insulated marine organism-preventing optical fiber composite submarine cable - Google Patents

Abstract

The utility model discloses a 220kV crosslinked polyethylene insulated marine organism-preventing optical fiber composite submarine cable which comprises a cable core, wherein the cable core is formed by twisting three power cables and a communication optical cable, and a reinforced wrapping tape wrapping layer, a brass strip anti-corrosion layer, an anti-corrosion asphalt polypropylene fiber inner lining layer, a metal armor layer and an anti-corrosion asphalt polypropylene fiber outer coating layer are sequentially wrapped outside the cable core. Compared with the prior art, the utility model has the beneficial effects that: has the characteristics of high tensile strength, water pressure resistance, marine organism corrosion resistance and chemical corrosion resistance; the longitudinal and radial water blocking performance is excellent, and the device can be suitable for the complex working condition marine environment with the water depth of more than 30 meters and bear the dynamic pressure under the action of sea waves.

Description

220kV crosslinked polyethylene insulated marine organism-preventing optical fiber composite submarine cable

Technical Field

The utility model relates to the field of submarine cables, in particular to a 220kV crosslinked polyethylene insulated marine organism-resistant optical fiber composite submarine cable.

Background

With the development of high-quality marine economy and the deep development of offshore clean energy development, particularly offshore wind power resources, the section, length and production technology of submarine cables are gradually rising, and the key to reducing the construction cost is. The original submarine cable with a medium-voltage and small-section structural design cannot meet the actual requirement; the transmission capacity of the system is increased, and the design of the cross-linked polyethylene insulated optical fiber composite submarine cable with a large cross section is a necessary trend.

The 220kV optical fiber composite submarine cable has the well-known technical difficulties in the cable industry, such as complex structural design, harsh and variable sea condition environment, large investment in product manufacturing equipment, high requirements on processing technology and waterproof performance, and the like. At present, the market share of the application field of the optical fiber composite submarine cable exceeds 60 percent of the offshore wind power stationIn wind farms of less than 200 megawatt capacity scale typically employ three cores of 400, 500mm²The submarine cable current collection line with the cross section is limited by factors such as large cable length, high cost, multiple routing resources occupied by laying and the like, and the submarine cable model selection with the cross section is not superior in the aspects of offshore wind power expansion capacity, cost reduction and the like. 800mm²The large-section optical fiber composite submarine cable is a high-end product in an alternating-current voltage system, and the large-section submarine cable is selected, so that the production cost is saved, the laying route resource is saved, the design requirement of 300 megawatt high-capacity wind field electric energy transmission is met, and the application prospect is wide.

In view of the fact that the submarine cable is laid in a high-pressure and corrosive submarine environment, marine organism ship worms inhabit and bite sometimes, the anti-marine organism optical fiber composite submarine cable is designed to effectively enhance the corrosion resistance of the submarine cable and prolong the service life.

SUMMERY OF THE UTILITY MODEL

The utility model provides a 220kV crosslinked polyethylene insulated marine organism-resistant optical fiber composite submarine cable which is characterized by excellent structural performance and being well suitable for the severe submarine environment.

In order to achieve the purpose, the utility model provides the following technical scheme: the 220kV crosslinked polyethylene insulated marine organism-preventing optical fiber composite submarine cable is characterized in that: the cable core is formed by twisting three power cables and a communication optical cable, and a reinforced wrapping tape wrapping layer, a brass strip anti-corrosion layer, an anti-corrosion asphalt polypropylene fiber inner liner layer, a metal armor layer and an anti-corrosion asphalt polypropylene fiber outer layer are sequentially wrapped outside the cable core.

Preferably, the power cable sequentially comprises an oxygen-free copper conductor, a semi-conductive wrapping tape, a conductor shielding layer, an insulating shielding layer, a semi-conductive water-blocking layer, a split-phase metal alloy lead sleeve and a semi-conductive polyethylene sheath layer from the inner layer to the outer layer.

As optimization, the oxygen-free copper conductor is a second type of oxygen-free copper conductor; the second type of oxygen-free copper conductor is formed by stranding 90 annealed copper wires.

Preferably, the communication optical cable is used for transmitting signals and is arranged in gaps among the three power cables; the communication optical cable comprises a single-mode optical fiber, water-blocking ointment, a stainless steel tube optical unit, a phosphatized steel wire armor layer and a high-density polyolefin sheath from an inner layer to an outer layer in sequence.

Preferably, the single-mode fiber is a twelve-core single-mode fiber.

As optimization, a special-shaped filling strip is filled between the power cable and the communication optical cable in the cable core; the special-shaped filling strips are made of non-moisture-absorbing filling strips and/or polypropylene fiber ropes.

As optimization, the metal armor layer is composed of a plurality of galvanized steel wires; the number of the galvanized steel wires is 119, and the diameter is phi 6.0 mm.

Optimally, the thickness of the split-phase metal alloy lead sleeve is 3.6-3.8 mm; the thickness of the semiconductive polyethylene sheath layer is 3.3-3.5 mm.

Optimally, the thickness of the split-phase metal alloy lead sleeve is 3.7 mm; the thickness of the semiconductive polyethylene sheath layer is 3.4 mm.

Preferably, the total thickness of the conductor shielding layer, the insulating layer and the insulation shielding layer is 26.3-28.5 mm.

Compared with the prior art, the utility model has the following beneficial effects: the optical fiber composite submarine cable has the characteristics of high tensile strength, water pressure resistance, marine organism moth resistance and chemical corrosion resistance; the longitudinal and radial water-blocking performance is excellent, and the device can be suitable for the complex working condition marine environment with the water depth of more than 30 meters and bear the dynamic pressure under the action of sea waves.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Wherein, anaerobic copper conductor 1, semiconduction are around band 2, conductor shielding layer 3, insulating layer 4, insulation shielding layer 5, semiconduction water-blocking layer 6, phase splitting metal alloy lead cover 7, semiconduction polyethylene restrictive coating 8, special-shaped filler strip 9, the oleamen 10 that blocks water, stainless steel pipe light unit 11, bonderized steel wire armor 12, high density polyolefin sheath 13, strenghthened type band is around band 14, brass band anticorrosion layer 15, anticorrosive pitch polypropylene fiber inner liner 16, metal armor 17, anticorrosive pitch polypropylene fiber tegument 18.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The 220kV crosslinked polyethylene insulated marine organism-preventing optical fiber composite submarine cable is characterized in that: the cable core is formed by twisting three power cables and a communication optical cable, and a reinforced wrapping tape wrapping layer 14, a brass strip anti-corrosion layer 15, an anti-corrosion asphalt polypropylene fiber inner liner layer 16, a metal armor layer 17 and an anti-corrosion asphalt polypropylene fiber outer layer 18 are sequentially coated outside the cable core.

The power cable is sequentially provided with an oxygen-free copper conductor 1, a semi-conductive wrapping tape 2, a conductor shielding layer 3, an insulating layer 4, an insulating shielding layer 5, a semi-conductive water-resistant layer 6, a split-phase metal alloy lead sleeve 7 and a semi-conductive polyethylene sheath layer 8 from the inner layer to the outer layer.

Wherein, the oxygen-free copper conductor 1 is a second type of oxygen-free copper conductor; the second type of oxygen-free copper conductor is formed by stranding 90 annealed copper wires. The device is used for transmitting current and can bear certain mechanical tension. And a round pressing structure is adopted, so that the cable is convenient to bend, the allowable bending radius of the cable can be reduced, and the service life of the cable in a dynamic seawater fluctuation environment is prolonged.

In order to effectively control the surface tip discharge of the oxygen-free copper conductor 1 and the situation that the conductor shielding layer 3 is embedded into the outermost copper monofilament gap of the oxygen-free copper conductor 1, 2 layers of semi-conductive super-nylon belts are wound on the outer layer of the oxygen-free copper conductor 1, so that the oxygen-free copper conductor has high tensile strength and excellent conductivity, and meanwhile, the overlapping rate of the overlapping type winding production process is controlled within the range of 25% -35%.

The total thickness of the conductor shielding layer 3, the insulating layer 4 and the insulating shielding layer 5 is 26.3-28.5 mm.

The semi-conductive water-blocking layer 6 is twisted in a layered mode, so that the semi-conductive water-blocking layer has excellent longitudinal water-blocking performance, and the tested water-permeable length meets the standard requirement index.

The structural design of the split-phase metal alloy lead sleeve 7 and the semi-conductive polyethylene sheath layer 8 is adopted, so that the split-phase metal alloy lead sleeve 7 with soft texture is protected from mechanical damage in the manufacturing process, the potential difference between the split-phase metal alloy lead sleeve 7 and the metal armor layer 17 is reduced, and the service life of the submarine cable is effectively prolonged. The thickness of the split-phase metal alloy lead sleeve 7 is 3.6-3.8 mm; the thickness of the semiconductive polyethylene sheath layer 8 is 3.3-3.5 mm.

Preferably, the thickness of the phase-separated metal alloy lead sleeve 7 is 3.7 mm; the thickness of the semiconductive polyethylene sheath layer 8 is 3.4 mm.

The communication optical cable is used for transmitting signals and is arranged in gaps among the three power cables; the communication optical cable comprises a single-mode optical fiber, a water-blocking ointment 10, a stainless steel tube optical unit 11, a phosphatized steel wire armor layer 12 and a high-density polyolefin sheath 13 from an inner layer to an outer layer in sequence.

Wherein the single mode fiber is a twelve-core single mode fiber.

Wherein, a special-shaped filling strip 9 is filled between the power cable and the communication optical cable in the cable core; the special-shaped filling strips 9 are made of non-moisture-absorbing filling strips and/or polypropylene fiber ropes. The packing is carried out in a mode of combining the non-moisture-absorbing packing strips and/or the polypropylene fiber ropes, the breaking strength of the packing strips is larger than 2000N, and the torsion stress of the large-section power cable during cabling can be effectively borne.

The brass strip anti-corrosion layer 15 is formed by utilizing the corrosion resistance of an alloy brass material and the insolubility of heavy metal oxides, and the anti-moth layer is arranged outside the cable core, so that the corrosion of seawater and the moth of marine organisms are effectively prevented, and the service life is prolonged.

Wherein, the metal armor layer 17 is composed of a plurality of galvanized steel wires; the number of the galvanized steel wires is 119, and the diameter is phi 6.0 mm. The structural design aims to improve the overall tensile strength of the finished cable core with the diameter as high as phi 260mm and reduce the unfavorable phenomena of creeks, bulges and the like caused by overlarge wire gaps.

The metal armor layer 17 is internally and externally provided with an anti-corrosion asphalt polypropylene fiber lining layer 16 and an anti-corrosion asphalt polypropylene fiber outer covering layer 18 respectively, and the metal armor layer can become a bearing structure when a submarine cable is laid, so that the cable core and the optical cable unit are protected. Secondly, the tension is kept stable during operation, and the short-circuit and flow-discharging effects are achieved. Thirdly, considering that the adhesion of the zinc coating of the submarine cable is reduced under the erosion action of seawater for a long time, the production process of coating the asphalt can effectively improve the corrosion resistance of the submarine cable.

Claims (8)

1.220kV crosslinked polyethylene insulation prevents compound submarine cable of marine organism optic fibre, its characterized in that: the cable comprises a cable core, wherein the cable core is formed by twisting three power cables and a communication optical cable, and a reinforced wrapping tape wrapping layer (14), a brass strip anti-corrosion layer (15), an anti-corrosion asphalt polypropylene fiber inner lining layer (16), a metal armor layer (17) and an anti-corrosion asphalt polypropylene fiber outer coating layer (18) are sequentially coated outside the cable core; the power cable is sequentially provided with an oxygen-free copper conductor (1), a semi-conductive wrapping tape (2), a conductor shielding layer (3), an insulating layer (4), an insulating shielding layer (5), a semi-conductive water-resistant layer (6), a split-phase metal alloy lead sleeve (7) and a semi-conductive polyethylene sheath layer (8) from the inner layer to the outer layer; the communication optical cable is used for transmitting signals and is arranged in gaps among the three power cables, and the communication optical cable sequentially and respectively comprises a single-mode optical fiber, a water-blocking ointment (10), a stainless steel tube optical unit (11), a phosphatized steel wire armor layer (12) and a high-density polyolefin sheath (13) from an inner layer to an outer layer.

2. The 220kV crosslinked polyethylene insulated marine organism resistant optical fiber composite submarine cable according to claim 1, wherein: the oxygen-free copper conductor (1) is a second type of oxygen-free copper conductor; the second type of oxygen-free copper conductor is formed by stranding 90 annealed copper wires.

3. The 220kV crosslinked polyethylene insulated marine organism resistant optical fiber composite submarine cable according to claim 1, wherein: the single mode fiber is a twelve-core single mode fiber.

4. The 220kV crosslinked polyethylene insulated marine organism resistant optical fiber composite submarine cable according to claim 1, wherein: a special-shaped filling strip (9) is filled between the power cable and the communication optical cable in the cable core; the special-shaped filling strips (9) are made of non-moisture-absorbing filling strips and/or polypropylene fiber ropes.

5. The 220kV crosslinked polyethylene insulated marine organism resistant optical fiber composite submarine cable according to claim 1, wherein: the metal armor layer (17) consists of a plurality of galvanized steel wires; the number of the galvanized steel wires is 119, and the diameter is phi 6.0 mm.

6. The 220kV crosslinked polyethylene insulated marine organism resistant optical fiber composite submarine cable according to claim 1, wherein: the thickness of the split-phase metal alloy lead sleeve (7) is 3.6-3.8 mm; the thickness of the semiconductive polyethylene sheath layer (8) is 3.3-3.5 mm.

7. The 220kV crosslinked polyethylene insulated marine organism resistant optical fiber composite submarine cable according to claim 6, wherein: the thickness of the split-phase metal alloy lead sleeve (7) is 3.7 mm; the thickness of the semi-conductive polyethylene sheath layer (8) is 3.4 mm.

8. The 220kV crosslinked polyethylene insulated marine organism resistant optical fiber composite submarine cable according to claim 2, wherein: the total thickness of the conductor shielding layer (3), the insulating layer (4) and the insulating shielding layer (5) is 26.3-28.5 mm.

Images