CN215265615U

CN215265615U - Salt-fog-resistant and moisture-resistant offshore wind power cable

Info

Publication number: CN215265615U
Application number: CN202121698885.9U
Authority: CN
Inventors: 张海平; 姚文忠; 王振金; 王焱; 陈彦
Original assignee: Hunan Valin Wire and Cable Co Ltd
Current assignee: Hunan Valin Wire and Cable Co Ltd
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2021-12-21
Anticipated expiration: 2031-07-26

Abstract

The utility model discloses a salt fog resistant moisture resistant offshore wind power cable, include the cable core and wrap up in the water blocking layer, tensile layer and the sheath of cable core by inside to outside. The cable core is formed by three power sinle silk transposition, the power sinle silk includes the conductor and wraps up in the outside salt fog resistant insulating layer of conductor, salt fog resistant insulating layer includes by interior endothelial anti-corrosion coating, foaming insulating layer and the exocuticle that sets up outside to, the utility model provides an offshore wind power cable effectively promotes holistic salt fog resistant performance of cable, electrical insulation through set up salt fog resistant insulating layer in the conductor outside, makes its adaptable salt fog environment, keeps the stability of cable function, and the cable is soft simultaneously, and is able to twist, and water-blocking nature is good, and is moisture resistant, and the super wearability of sheath is also good, is suitable for the cable that marine climate used for a section.

Description

Salt-fog-resistant and moisture-resistant offshore wind power cable

Technical Field

The utility model relates to the technical field of cables, especially, relate to a salt spray resistant moisture resistant offshore wind power cable.

Background

With the rapid development of economy in China, the industrialization and urbanization processes are accelerated, and the energy demand is rapidly increased. In recent years, people pay more attention to environmental protection, clean energy and energy conservation and emission reduction due to continuous increase of haze weather, and governments clearly propose in work reports: energy structure needs to be optimized, the petrochemical energy occupation ratio is reduced, and new energy is vigorously developed. Renewable energy sources such as wind energy, photovoltaic solar energy, biomass energy, geothermal energy and the like are met with development opportunities again.

The wind energy cable is mainly used for connecting wires of fans and has very bad use environment. Because the cable is easily affected by external environment and marine climate near the seaside, especially under severe conditions of high salt mist, high humidity, frequent friction and the like, the cable is easily invaded by the salt mist to cause the conductor to be corroded, and the stability of the cable is affected. In view of the above, there is a need for a multifunctional cable that can protect the conductor from being affected by salt fog, high humidity and frequent friction, and can be used stably. At present, most of flexible cables used in wind driven generators are common flexible cables, and the harsh requirements of the cable use environment cannot be completely met.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problems existing in the prior art and providing a super wear-resistant salt fog-resistant moisture-resistant offshore wind power cable.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a salt-fog-resistant and moisture-resistant offshore wind power cable comprises a cable core, and a water blocking layer, a tensile layer and a sheath which are wrapped on the cable core from inside to outside. The cable core is formed by twisting three power wire cores, each power wire core comprises a conductor and a salt mist resistant insulating layer wrapped outside the conductor, and the salt mist resistant insulating layers are wrapped on the conductors in an extruding mode.

Furthermore, the conductor is formed by twisting copper wires in the same direction, an aramid fiber wire reinforced core is filled in the copper wires, the copper wires are made of 5 th class soft copper conductors meeting IEC 60228 standard, the same direction and the small pitch-diameter ratio are twisted, the pitch-diameter ratio is controlled to be 12-14, and the surface of the conductor is kept clean and free of oil stains.

Furthermore, the salt spray resistant insulating layer comprises an inner skin anti-corrosion layer, a foaming insulating layer and an outer skin layer which are arranged from inside to outside. The main material of the inner skin anti-corrosion layer is high-density polyethylene; the foaming insulation layer is a foaming insulation structure formed by polyethylene physical foaming, and the foaming insulation structure is formed by injecting nitrogen; the outer skin layer is a nylon elastomer layer. The inner anti-corrosion layer, the foamed insulating layer and the outer skin layer are extruded and molded by a three-layer co-extrusion process, and the salt spray resistance and the electric insulating property are excellent.

Preferably, the water-blocking layer is formed by wrapping a composite water-blocking tape with double-layer gaps, so that the infiltration of water and moisture can be reduced, and the flexibility of the cable is improved.

Preferably, the tensile layer is formed by weaving aramid fibers, and the weaving density is percent, so that the tensile capacity of the cable can be improved, the flexibility is considered, and the adhesion between the sheath and the cable core is tighter.

Preferably, the discharging material of the sheath is composite rubber, and the sheath has the advantages of high strength, good wear resistance and the like.

Compared with the prior art, the beneficial effects of the utility model are that: salt fog resistant and moisture resistant offshore wind power cable effectively promotes the whole salt fog resistant performance and electrical insulation of the cable by arranging the salt fog resistant insulating layer outside the conductor, so that the cable can adapt to a salt fog environment, the stability of the function of the cable is kept, and meanwhile, the cable is soft, torsion resistant, good in water resistance, moisture resistant, excellent in super wear resistance of the sheath, and suitable for being used in offshore climate.

Drawings

FIG. 1 is a schematic view of the present offshore wind power cable.

In the figure: 1. a power wire core; 2. a water resistant layer; 3. a tensile layer; 4. a sheath; 11. a conductor; 12. an insulating layer; 111. a copper wire; 112. aramid fiber silk reinforced core; 121. an endothelial corrosion resistant layer; 122. foaming the insulating layer; 123. an outer skin layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Example 1

Referring to fig. 1, the salt spray resistant and moisture resistant offshore wind power cable comprises a cable core, a water blocking layer 2, a tensile layer 3 and a sheath 4, wherein the water blocking layer 2, the tensile layer 3 and the sheath are wrapped on the cable core from inside to outside. The cable core is formed by twisting three power wire cores 1, each power wire core 1 comprises a conductor 11 and a salt mist resistant insulating layer 12 wrapping the outer portion of the conductor, and the salt mist resistant insulating layers 12 are extruded on the conductors 11.

Furthermore, the conductor 11 is formed by twisting copper wires 111 in the same direction, an aramid fiber reinforced core 112 is filled in the middle of the copper wires 111, the copper wires 111 adopt a class 5 soft copper conductor meeting the IEC 60228 standard, twisting is performed in the same direction with a small pitch-diameter ratio which is controlled to be 12-14, and the surface of the conductor is kept clean and free of oil stains.

Further, the salt spray resistant insulating layer 12 includes an inner anti-corrosion layer 121, a foamed insulating layer 122 and an outer skin layer 123 arranged from inside to outside. The main material of the inner skin anticorrosion layer 121 is high-density polyethylene, and in this embodiment, the inner skin anticorrosion layer 121 includes the following components in parts by weight: 100 parts of high-density polyethylene, 0.5-0.8 part of binder and 0.5-0.8 part of corrosion inhibitor. The foamed insulation layer 122 is a foamed insulation structure formed by physically foaming polyethylene, and the foamed insulation structure is formed by injecting nitrogen. The outer skin layer 123 is a nylon elastomer layer. The inner anti-corrosion layer 121, the foamed insulating layer 122 and the outer skin layer 123 are formed by extrusion through a three-layer co-extrusion process, and are excellent in salt spray resistance and electric insulation performance.

In this embodiment, the water-blocking layer 2 is formed by wrapping a composite water-blocking tape with a double-layer gap, so that the infiltration of water and moisture can be reduced, and the flexibility of the cable can be improved.

In the embodiment, the tensile layer 3 is formed by weaving aramid fibers, the weaving density is 30% -40%, the tensile capacity of the cable can be improved, the flexibility is considered, and the sheath and the cable core are bonded more tightly.

In the embodiment, the jacket 4 is made of composite rubber, and has the advantages of high strength, good wear resistance and the like.

The offshore wind power cable in the embodiment has the advantages that the salt spray resistant insulating layer is arranged outside the conductor, so that the overall salt spray resistance and electrical insulation of the cable are effectively improved, the cable is adaptable to a salt spray environment, the stability of the function of the cable is kept, and meanwhile, the cable is soft, torsion resistant, good in water resistance, moisture resistant and good in super-abrasion resistance of the sheath, and is suitable for being used in offshore climate.

Example 2

Specific production examples of offshore wind cables in this embodiment:

(1) the 288/0.375 copper conductor 111 is filled with an aramid fiber wire reinforced core 112 to obtain a conductor 11, and then the conductor 11 is extruded with a salt mist resistant insulating layer 12, wherein the thickness of the salt mist resistant insulating layer 12 is 2.6mm, so that a power wire core 1 is obtained.

(2) After the three power wire cores 1 are cabled, the composite water-blocking tape is wrapped, double-layer gap wrapping is adopted, the ratio of the cable forming pitch to the wrapping pitch is not more than 14 times, the cabling direction is consistent with the wrapping direction, the wrapping overlapping rate is not lower than 25%, and a water-blocking layer 2 is obtained.

(3) And (3) weaving aramid fibers outside the water-resistant layer 2, wherein the density is 30-40%, and thus the tensile layer 3 is formed.

(4) Extruding a sheath 4 outside the tensile layer 3, and controlling the thickness of the sheath 4 at 3.4mm to obtain a finished cable.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a salt fog resistant moisture offshore wind power cable, includes the cable core and wraps up in water-blocking layer (2), tensile layer (3) and sheath (4) of cable core from inside to outside, its characterized in that, the cable core is formed by three power sinle silks (1) transposition, power sinle silks (1) include conductor (11) and wrap up in the outside salt fog resistant insulating layer (12) of conductor, salt fog resistant insulating layer (12) include by the inside to outside endothelial anticorrosion layer (121), foaming insulating layer (122) and ectoderm (123) that set up.

2. Salt-fog-resistant and moisture-resistant offshore wind power cable according to claim 1, characterized in that the conductor (11) is co-twisted of copper wires (111), the copper wires (111) being filled with an aramid fiber wire reinforcement core (112) in between.

3. Salt-fog-resistant moisture-resistant offshore wind power cable according to claim 1, characterized in that the foamed insulating layer (122) is a foamed insulating structure formed by physical foaming of polyethylene, and the foaming gas is nitrogen.

4. Salt-fog resistant moisture tolerant offshore wind cable according to claim 1, characterized in that the outer skin layer (123) is a nylon elastomer layer.

5. The salt-fog-resistant and moisture-resistant offshore wind power cable according to claim 1, wherein the water-blocking layer (2) is formed by wrapping a composite water-blocking tape with double-layer gaps.

6. Salt-fog-resistant and moisture-resistant offshore wind power cable according to claim 1, characterized in that the tensile layer (3) is woven from aramid filaments.

7. Salt-fog-resistant moisture-resistant offshore wind power cable according to claim 1, characterized in that the outfeed of the sheath (4) is of compounded rubber.