CN210245120U - Multifunctional composite island power cable - Google Patents

Abstract

The utility model discloses a multifunctional composite island power cable, which comprises a seabed directly-buried section, a land directly-buried section and a coast suspension section, wherein the coast suspension section is communicated with the seabed directly-buried section and the land directly-buried section, and also comprises a cable core and a protective layer arranged outside the cable core; the cable core comprises at least one insulating wire core and at least one buffer type tensile unit. The utility model discloses according to direct-burried under the seabed, the coast section hangs, the land section direct-burried difference in island lays the environment, divide into land direct-burried section, coast hang the different protective structure of section, seabed direct-burried section syllogic with the cable, through the different structural design of a cable design segmentation differentiation, satisfied the different requirement of laying the environment, improve the adaptability of cable under different environment, have the advantage that tensile resistance to compression antidetonation water-proof grease proofing ultraviolet ray insect prevention mouse that shocks resistance. The buffering type tensile unit arranged at the same time has the effects of buffering and bearing capacity under the action of short-time ultra-high-strength impact tension.

Description

Multifunctional composite island power cable

Technical Field

The utility model relates to a multi-functional compound island power cable of tensile, resistance to compression, shock resistance, antidetonation, waterproof, grease proofing, ultraviolet protection, protection against insects mouse.

Background

China is a large ocean, has a sea area of more than 300 ten thousand square kilometers and a coastline of 18000 kilometers, has 6000 islands distributed along the sea, contains abundant submarine oil fields and natural gas in shallow sea continents, is an economically developed area of China along the sea, and urgently needs electricity for the development of domestic coastal islands.

With the continuous development and utilization of ocean resources, the development of islands is more and more emphasized by the nation and the society, meanwhile, coastal people continuously strengthen the requirements on electric power and communication in order to improve the environment and improve the production and living quality, and a wide market prospect is provided for developing, researching and producing large-length high-voltage island electric power communication comprehensive cables. Particularly, new oil and gas fields are continuously discovered in shallow sea of China, a large number of cables are needed for communication and power supply of offshore oil platforms, and the development of the marine fishery still needs imported island power communication composite cables. However, the power and communication of the island are always the bottleneck restricting the economic development of the island. The power supply safety of the island is ensured, and the reliability of signal transmission is imperative. The wire and cable industry is an important matching industry of the two major national economy pillar industries of power and communication, and has an extremely important position in the national economy, wherein the total production amount of the industry accounts for 4-5 per mill of total GDP in the whole country, and wire and cable products play important roles in conveying energy and transmitting information and are blood vessels and nerves of the national economy. The submarine cables and pipelines are laid for thousands of kilometers every year in China, and the submarine cables account for about 10% -15% of the whole laying amount. With the rapid development of national economy, island construction and continuous development of islands, the demand of deep sea energy exploitation on submarine cables in China is greatly increased. And the common submarine cable can only be used for water depth of 0-100m, and deep sea oil exploitation and coastal wind power have higher requirements on submarine electrical performance and waterproof performance. The natural environment of the coastal region and the island is different from the inland, belongs to saline-alkali soil, and has high humidity, so the environment-resistant adaptive capacity of the cable is required to be considered when the cable is laid in the region.

Analyzing the installation and laying environment of the island cable, besides the water prevention and seawater corrosion prevention of the conventional sea bottom cable, based on the complex geographical environment of the sea bottom, the coast and the island hills of the sea island, the cable is required to have a series of defense functions such as short-time huge impact tension damage caused by seabed earthquake and offshore ship anchoring, cable bending fatigue damage caused by frequent seawater surge to a coast suspension section, excessive bending of the cable caused by rock protruding from the coast section, ultraviolet aging corrosion above sea level, pressure damage caused by hillstones at a land directly-buried section of the island and the like; in order to meet the requirements of the operation laying environment and improve the island economy, a novel island power cable with tensile, compression, impact, shock, water, oil, ultraviolet and insect and mouse resistance and a production process are urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a multifunctional composite island power cable, which solves the problems that the existing submarine cable is generally divided into an underwater embedding section and a land embedding section, under the circumstance that the slope of the sea island is steeper, the cable is easy to be damaged due to too small bending radius or too large tension, but also the safety performance of the prior cable is uneven, and the prior cable can not achieve the problems of high conductivity, low cost, energy conservation, environmental protection, excellent water resistance, corrosion resistance, creep resistance, fatigue resistance and other properties, thereby realizing the sectional differentiated structural design of one cable according to different laying environments of direct burial under the seabed, coastal section suspension and island land section direct burial, meeting the requirements of different laying environments, the cable has good performances of waterproofness, corrosion resistance, ultraviolet resistance, oil stain resistance and the like, and can reduce the magnetic flux of the outer layer of the cable, thereby reducing the electromagnetic conversion loss and the heat generation in the power transmission process of the cable.

Realize the utility model discloses the technical scheme of purpose is: a multi-functional composite island power cable comprising:

the seabed direct-buried section is laid under the seabed;

the land direct-buried section is laid under the sea island land;

the coastal suspension section is suspended on the coast and is communicated with the seabed directly-buried section and the land directly-buried section;

the seabed directly-buried section, the land directly-buried section and the coast suspension section comprise cable cores and protective layers arranged outside the cable cores;

the cable core comprises at least one insulating wire core and at least one buffer type tensile unit; the buffer type tensile unit sequentially comprises a carbon fiber composite core, an elastic cushion layer, a steel wire layer and an asphalt coating layer from inside to outside.

Further, the protective layer comprises a fiber rope winding layer; the fiber rope winding layer is impregnated with asphalt, and the fiber rope winding layer is wound and then impregnated, so that the asphalt can impregnate the winding rope and the armor layer inside together.

Further, the protective layer also comprises a fatigue bending resistant layer; the fatigue bending resistant layer is of a stainless steel strip interlocking armor structure, is arranged on the coast suspension section and is positioned between the cable core and the fiber rope winding layer.

Further, the protective layer also comprises a mechanical damage resistance layer; the mechanical damage resistant layer is made of stainless steel bands, is arranged on the land direct-buried section and is located between the cable core and the fiber rope winding layer.

Furthermore, the insulating wire core sequentially comprises a conductor, a conductor shielding layer, an insulating shielding layer and a lead sleeve anti-corrosion shielding layer from inside to outside.

Further, the cable core further comprises at least one communication monitoring unit; the communication monitoring unit includes an inner fiber optic bundle and an outer ferrule.

Furthermore, the cable core also comprises at least one oil pipe unit and one water pipe unit; the oil pipe unit adopts a composite structure of a first stainless steel inner pipe and a first plastic outer pipe; the water pipe unit adopts a composite structure of a second stainless steel inner pipe and a second plastic outer pipe.

Further, the multifunctional composite island power cable further comprises a tension seat; the tension seat is arranged at the joint of the coastal suspension section and the land direct-buried section and is divided into an upper seat and a base which can be opened and closed; notches are correspondingly arranged on the upper seat and the base, and a main threading channel is formed after the notches are closed; and the upper seat and the base are also provided with tensile unit threading channels with the same quantity as the buffer tensile units.

Furthermore, the tensile unit threading channel comprises a composite core threading hole positioned in the center and a plurality of steel wire threading holes surrounding the outer part of the composite core threading hole.

Furthermore, the buffer type tensile unit is connected with the tension seat through tension, steel wires of the steel wire layer respectively penetrate through the steel wire threading holes to be welded with the tension seat, and the carbon fiber composite core penetrates through the composite core threading holes to be in an axial free displacement state.

After the technical scheme is adopted, the utility model discloses following positive effect has:

(1) the utility model discloses according to direct-burried under the seabed, the coast section hangs, the land section direct-burried difference in island lays the environment, divide into land direct-burried section, coast suspension section, seabed direct-burried section syllogic structure with the cable, through the differentiated structural design of a cable design segmentation, satisfied the different requirement of laying the environment, reduced the degree of difficulty and laid the cost. Meanwhile, a buffering type tensile unit containing an elastic cushion layer is arranged at the cable filling position, when the tensile force of the steel wire is increased, the elastic cushion layer is radially extruded, the outer diameter of the elastic cushion layer is reduced, the length of the steel wire is extended, the buffering effect is achieved, and meanwhile, the tensile force of the carbon fiber composite core plays a leading role along with the increase of the radial force of the steel wire and the elastic cushion layer; due to the structural design, the cable has good tensile capacity, and the problem that under the action of receiving huge tensile impact such as seabed earthquake, offshore ship breaking and the like, the buffer type tensile unit of the cable firstly generates axial displacement extension to buffer huge impact force is well solved; then the tensile force is concentrated on the carbon fiber to bear the effect of huge tensile force impact. In addition, the buffer type tensile unit can also reduce the magnetic flux of the outer layer of the cable, so that the electromagnetic conversion loss and the heat generation in the power transmission process of the cable are reduced.

(2) The utility model discloses according to the environment of laying of difference, set up different inoxidizing coatings in the cable core outside to make the cable have performance such as good waterproof nature, anticorrosive, ultraviolet protection, grease proofing dirt.

(3) The fiber rope winding layer in the protective layer is impregnated with asphalt to achieve the effects of structural fixation and corrosion prevention because of the consideration of seawater erosion and tidal impact.

(4) Because the coastal suspension section cable is impacted by tide, the cable is in a dynamic bending state, and in order to prevent the cable from being excessively bent and prevent tide inclusions from impacting the cable, the suspension section is provided with the fatigue bending resistant layer adopting a stainless steel strip interlocking armor structure, so that the fatigue bending resistant and sundry impact resistant effects are achieved.

(5) Because the land direct-buried section cable adopts the mechanical damage resistance layer of the stainless steel strip armor structure, the mechanical damage resistance of the island mountain stone of the cable is effectively improved.

(6) Because the conductor adopts a soft structure and the insulating layer adopts elastic materials such as rubber and the like, the bending property of cable installation and laying is greatly improved, and the fatigue bending resistance of frequent impact of seawater surge is greatly improved.

(7) In order to monitor the deformation vibration strength, temperature and mechanical damage of the cable in real time, at least one communication monitoring unit is arranged in the cable core, and meanwhile, the data communication function can be realized.

(8) Due to the adoption of the oil pipe unit and the water pipe unit, the function of the sea island cable can be expanded.

(9) Because the cable at the coastal suspension section is impacted by tide, the cable is in a dynamic bending state, and in order to prevent the cable from being excessively bent and prevent tide inclusions from impacting the cable, a tension seat is arranged at the joint of the coastal suspension section and the land directly-buried section, so that the effect of fixing the traction force of the middle section of the cable is realized.

(10) The utility model discloses a tension seat adopts and is fixed with the tension seat with the cross winding steel wire on steel wire layer in the buffering formula tensile unit with the welding point, and the compound core of carbon fiber passes from the compound core through wires hole of carbon fiber, can be in the tension seat free displacement, the effectual purpose of having realized the buffering to cable tension.

(11) In order to prevent the buffer type tensile unit from being easily broken due to stress concentration caused by small-angle bending, the steel wire threading hole of the tension seat, the composite core wire perforation and the cable form taper, and the taper is matched with the angle of separation and dispersion of the cable buffer type tensile unit from the cable, so that the composite core can freely move in the composite core threading hole of the tension seat in the process of playing the tension buffer.

Drawings

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which

Fig. 1 is an overall schematic view of the present invention.

Fig. 2 is a schematic structural diagram of the seabed directly-buried section of the present invention.

Fig. 3 is a schematic structural diagram of the steel wire layer of the buffer type tensile unit of the present invention.

Fig. 4 is a schematic structural view of the coastal suspension section of the present invention.

Fig. 5 is a schematic view of the structure of the protective layer of the coastal suspension section of the present invention.

Fig. 6 is a schematic structural diagram of the land direct-buried section of the present invention.

Fig. 7 is a schematic structural view of the tension seat of the present invention.

Fig. 8 is a schematic view of the connection of the coastal suspension section and the tension seat of the present invention.

The reference numbers are:

100 cable cores;

110 insulated wire core, 111 conductor, 112 conductor shielding layer, 113 insulating layer, 114 insulating shielding layer and 115 lead sheath anticorrosion shielding layer;

120 buffer type tensile units, 121 carbon fiber composite cores, 122 elastic cushion layers, 123 steel wire layers and 124 asphalt coating layers;

130 communication monitoring units, 131 optical fiber bundles and 132 sleeves;

140 oil pipe units, 141 a first stainless steel inner pipe and 142 a first plastic outer pipe;

150 water pipe units, 151 a second stainless steel inner pipe, 152 a second plastic outer pipe;

200 protective layers, 210 fiber rope winding layers, 220 fatigue bending resistant layers and 230 mechanical damage resistant layers;

300 tension seats, 310 upper seats, 320 bases, 330 main threading channels, 340 tensile unit threading channels, 341 carbon fiber composite core threading holes, 342 steel wire threading holes, 350 haver slitting planes, 360 fixing pieces and 370 reinforcing supports;

400 steel wire tension seat welding points.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model provides a multi-functional compound island power cable and manufacturing process for solve island cable among the prior art can't reach high electrically conductive, with low costs, energy-concerving and environment-protective, the water resistance is excellent, multiple performance's such as anticorrosion, creep resistance, antifatigue problem. In order to solve the above problem, the general idea of the present invention is as follows:

a multi-functional composite island power cable comprising: the seabed direct-buried section is laid under the seabed; the land direct-buried section is laid under the sea island land; the coastal suspension section is suspended on the coast and is communicated with the seabed directly-buried section and the land directly-buried section;

the seabed directly-buried section, the land directly-buried section and the coast suspension section comprise cable cores and protective layers arranged outside the cable cores;

the cable core comprises at least one insulating wire core and at least one buffer type tensile unit; the buffer type tensile unit sequentially comprises a carbon fiber composite core, an elastic cushion layer, a steel wire layer and an asphalt coating layer from inside to outside.

The utility model discloses according to direct-burried under the seabed, the coast section hangs, the land section direct-burried difference in island lays the environment, divide into land direct-burried section, coast suspension section, seabed direct-burried section syllogic structure with the cable, through the differentiated structural design of a cable design segmentation, satisfied the different requirement of laying the environment, reduced the degree of difficulty and laid the cost.

The technical solution of the present invention will be described and explained in detail by several specific embodiments.

As shown in fig. 1, a multifunctional composite island power cable includes: the seabed direct-buried section is laid under the seabed; the land direct-buried section is laid under the sea island land; and the coast suspension section is suspended on the coast and is communicated with the seabed directly-buried section and the land directly-buried section. The length of the seabed directly-buried section is a, the length of the coast suspension section is b, the length of the land directly-buried section is c, and the coast suspension section provides traction force at the connection position of the coast suspension section and the land directly-buried section through a tension seat. The seabed directly-buried section, the land directly-buried section and the coast suspension section of the island power cable comprise a cable core 100 and a protection layer 200 arranged outside the cable core, and the cable protection layers 200 under different laying environments are different.

As shown in fig. 2, 4 and 6, the cable core 100 of the seabed directly-buried section, the land directly-buried section and the coastal suspended section of the present embodiment has a uniform structure, and includes three insulated wire cores 110, three buffer type tensile units 120, two communication monitoring units 130, two oil pipe units 140 and two water pipe units 150. Other numbers are of course possible, and the number is only an option and not a limitation on the number of insulated wire cores, buffer tension units, monitoring units, tubing units and water tubing units.

The insulated wire core 110 is sequentially provided with a conductor 111, a conductor shielding layer 112, an insulating layer 113, an insulated shielding layer 114 and a lead sheath anti-corrosion shielding layer 115 from inside to outside. In this embodiment, the conductor 111 is of a soft structure, the insulating layer 113 is made of elastic materials such as rubber, so that the elasticity of the wire core is better, and the lead sheath anti-corrosion shielding layer 115 effectively improves the pressure resistance and tensile resistance of the cable and has good performances such as water resistance, corrosion resistance, ultraviolet resistance and oil stain resistance.

The buffer tensile unit 120 is sequentially composed of a carbon fiber composite core 121, an elastic cushion layer 122, a steel wire layer 123 and an asphalt coating layer 124 from inside to outside. As shown in fig. 3, the steel wire layer 123 cross-weaves steel wires in a plain weave structure outside the elastic cushion layer 122. The buffer type tensile unit is arranged at the cable filling position, when the tensile force of the steel wire is increased, the elastic cushion layer is radially extruded, the outer diameter of the elastic cushion layer is reduced, the length of the steel wire is extended, the buffer effect is achieved, meanwhile, the tensile force of the carbon fiber composite core plays a leading role along with the increase of the radial force of the steel wire and the elastic cushion layer, and the carbon fiber has good tensile property and no deformation, so that after the steel wire is buffered by the elastic cushion layer with a certain deformation, the tensile force is continuously increased and is not deformed, and the effect of bearing great tensile capacity is finally achieved; the cable can firstly generate axial displacement extension through the buffer type tensile unit, so that the effect of buffering huge impact force is achieved; then, the steel wires are woven in a crossed mode to axially displace and extend, so that the radial pressure of the steel wire layer 123 on the elastic cushion layer 122 is increased, the large tensile force is transferred to the carbon fiber composite core 121 from small to large while the large tensile force is buffered, finally, all the tensile force is added to the carbon fiber composite core 121, at the moment, the axial displacement buffering of the whole buffering type tensile unit 120 is finished, the buffering type tensile unit 120 becomes a rigid tensile element with the large tensile capacity, the cable core 100 protected by the buffering type tensile unit is prevented from being damaged by external mechanical force, and the buffering and protecting effects are achieved; in addition, the buffer type tensile unit can also reduce the magnetic flux of the outer layer of the cable, so that the electromagnetic conversion loss and the heat generation in the power transmission process of the cable are reduced.

The communication monitoring unit 130 includes an inner communication monitoring fiber bundle 131 and an outer sleeve 132, which effectively monitor the communication strength, temperature, and mechanical damage of the cable.

The oil pipe unit 140 adopts a composite structure of a first stainless steel inner pipe 141 and a first plastic outer pipe 142; the water pipe unit 150 has a composite structure of the second stainless steel inner pipe 151 and the second plastic outer pipe 152, so that the water pipe unit has excellent insulating property, can bear high working electric field strength, and has low dielectric loss and good heat dissipation.

As shown in fig. 2, the armor layer 200 of the seabed directly buried segment of the present embodiment includes a fiber rope winding layer 210, and the fiber rope winding layer 210 is impregnated with asphalt, and is wound first and then impregnated with asphalt, so that the manufacturing is convenient.

As shown in fig. 4, the armor layer 200 of the coastal suspension segment of the present embodiment includes a fiber rope winding layer 210 and a fatigue bending resistant layer 220. As shown in fig. 5, the fatigue bending resistant layer 220 is formed by interlocking stainless steel tapes and is located between the cable core 100 and the fiber rope winding layer 210, and after the fiber rope is wound, the fiber rope is impregnated with asphalt, which can impregnate the winding rope and the inner armor layer together, thereby achieving the effects of structural fixation and corrosion prevention. Because the coastal suspension section cable is impacted by tide, the cable is in a dynamic bending state, and in order to prevent the cable from being excessively bent and prevent tide inclusions from impacting the cable, the fatigue bending resistant layer 220 adopts a stainless steel strip interlocking armor structure, and has the effects of fatigue bending resistance and sundry impact resistance.

As shown in fig. 6, the cable protective layer 200 of the land direct-buried segment includes a fiber rope winding layer 210 and a mechanical damage resistance layer 230, the mechanical damage resistance layer 230 is made of a stainless steel band and is located between the cable core 100 and the fiber rope winding layer 210, so that the mechanical damage resistance of the cable against island mountain stones is effectively improved. Unlike the hanging segments, the abuse resistant layer 230 herein is a flat steel armor, and does not require interlocking structures.

As shown in fig. 7 and 8, the cable is in a dynamic bending state in consideration of the impact of tide on the cable in the coastal suspension section, and in order to prevent the cable from being excessively bent and impact of tide inclusion on the cable, a tension seat 300 structure is arranged at the connection position of the coastal suspension section and the land directly-buried section, so that the function of fixing the traction force of the middle section of the cable is realized. The tension seat 300 is arranged at the joint of the coastal suspension section and the land direct-buried section, and the joint of the coastal suspension section and the land direct-buried section is made by tension 300, so that the protective layer 200 of the coastal suspension section is stripped off.

As shown in fig. 7, the tension seat is divided into an upper seat 310 and a base 320 which can be opened and closed, and the opening and closing can be a full-open or half-open harvard structure. In this embodiment, a half-open haversian structure is adopted, that is, one side of the upper seat 310 is hinged to one side of the base 320, and the other side is fixed by a fixing member 360, and the fixing member 360 may be a fastening bolt or other objects capable of fixing. The upper seat 310 and the base 320 are respectively provided with two half cutting surfaces 350 which correspond to each other, each half cutting surface 350 is provided with two fixing pieces 360 for fixing the upper seat 310 and the base 320, and the structure can be installed on the periphery of a cable from the middle position of the cable after being opened, so that the traction force fixation of the middle section of the cable is realized, and the characteristic that the cable core is of a whole structure is combined, so that the middle part of the cable is free from a connecting joint, the integrity of the cable is kept, and the whole electrical safety performance of the cable is improved; the upper seat 310 and the base 320 are correspondingly provided with a semicircular notch, and a main threading channel 330 is formed after the semicircular notch is closed, so that the parts of the cable core 100, except the buffer type tensile unit 120, including the three insulation wire cores 110, the two communication monitoring units 130, the two oil pipe units 140 and the two water pipe units 150 can pass through; a tensile unit threading channel 340 corresponding to the buffer tensile unit 120 is arranged above the semicircular gap of the upper seat 310, and tensile unit threading channels 340 corresponding to the buffer tensile unit 120 are respectively arranged below two haversian sectioning surfaces 350 of the base 320 and correspond to the arrangement positions of the buffer tensile units 120 in the cable core 100; as shown in fig. 8, the cross-wound wires of the wire layer 123 in the buffer type tension unit 120 pass through the wire threading holes 342 in the tension unit threading passages 340, are fixed to the tension base 300 by forming wire tension base welds 400 by welding, the carbon fiber composite core 121 directly passes through the carbon fiber composite core threading hole 341 in the threading passage 340 of the tensile unit, since stress concentration is easily broken due to bending at a small angle in order to prevent the buffered tension unit 120, therefore, the steel wire threading hole 342 and the carbon fiber composite core wire perforation 341 in the threading channel 340 of the tensile unit form a taper with the cable, which is matched with the angle of the cable buffer type tensile unit 120 separated and dispersed from the cable, therefore, the carbon fiber composite core 121 can freely move in the carbon fiber composite core perforation 341 of the tension seat 300 in the process of playing the tension buffering, and the purpose of cable tension buffering is effectively achieved. As shown in fig. 7, the sectional area of the upper seat 310 gradually increases toward the base 320, and the sectional area of the base 320 is not smaller than that of the upper seat 310, so that the tension seat 300 can be more stable. In order to further improve the stability of the base, a pair of reinforced supports 370 is further arranged at the bottoms of the left end and the right end of the base 320, and the reinforced supports 370 are gradually inclined outwards from top to bottom, so that the stability of the inclined plane is better.

A process for manufacturing the island in the sea power cable, comprising the steps of:

measuring the lengths required by a seabed directly-buried section, a land directly-buried section and a coast suspension section, wherein the lengths are respectively a, b and c as shown in figure 1;

manufacturing the cable core 100;

according to the measured length, arranging a mechanical damage resistance layer 230 outside the cable core 100 of the land direct-buried section and a fatigue bending resistance layer 220 outside the cable core 100 of the coast suspension section, then winding fiber ropes outside the land direct-buried section provided with the mechanical damage resistance layer 230, the coast suspension section provided with the fatigue bending resistance layer 220 and the cable core 100 of the seabed direct-buried section together to form a fiber rope winding layer 210, and then dipping asphalt;

when laying, according to the above mode, the tension seat is arranged.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (9)

1. A multifunctional composite island power cable is characterized by comprising:

the seabed direct-buried section is laid under the seabed;

the land direct-buried section is laid under the sea island land;

the coastal suspension section is suspended on the coast and is communicated with the seabed directly-buried section and the land directly-buried section;

the seabed directly-buried section, the land directly-buried section and the coast suspension section comprise continuous cable cores (100) and three-section different protective layers (200) arranged outside the cable cores (100);

wherein the cable core (100) comprises at least one insulated wire core (110) and at least one buffered tensile unit (120); the buffer type tensile unit (120) sequentially comprises a carbon fiber composite core (121), an elastic cushion layer (122), a steel wire layer (123) and an asphalt coating layer (124) from inside to outside.

2. The multifunctional composite island power cable according to claim 1, wherein:

the armour layer (200) comprises a wound layer of fibre rope (210); the wrapped layer of fiber strands (210) is impregnated with pitch.

3. The multifunctional composite island power cable according to claim 2, wherein:

the armour layer (200) further comprises a fatigue bending resistant layer (220); the fatigue bending resistant layer (220) adopts a stainless steel strip interlocking armor structure, is arranged at the coast suspension section and is positioned between the cable core (100) and the fiber rope winding layer (210).

4. The multifunctional composite island power cable according to claim 2, wherein:

said protective layer (200) further comprising a mechanical damage resistant layer (230); the mechanical damage resisting layer (230) is made of a stainless steel belt, is arranged on the land direct-buried section and is positioned between the cable core (100) and the fiber rope winding layer (210).

5. The multifunctional composite island power cable according to any one of claims 1 to 4, wherein:

the insulated wire core (110) is sequentially provided with a conductor (111), a conductor shielding layer (112), an insulating layer (113), an insulated shielding layer (114) and a lead sleeve anti-corrosion shielding layer (115) from inside to outside.

6. The multifunctional composite island power cable according to claim 5, wherein:

the cable core (100) further comprises at least one communication monitoring unit (130); the communication monitoring unit (130) comprises an inner communication monitoring fiber bundle (131) and an outer ferrule (132).

7. The multifunctional composite island power cable according to claim 6, wherein:

the cable core (100) further comprises at least one oil pipe unit (140) and one water pipe unit (150); the oil pipe unit (140) adopts a composite structure of a first stainless steel inner pipe (141) and a first plastic outer pipe (142); the water pipe unit (150) adopts a composite structure of a second stainless steel inner pipe (151) and a second plastic outer pipe (152).

8. The multi-functional composite island power cable according to claim 7, wherein:

also includes a tension seat (300); the tension seat (300) is arranged at the joint of the coastal suspension section and the land direct-buried section and is divided into an upper seat (310) and a base (320) which can be opened and closed; notches are correspondingly arranged on the upper seat (310) and the base (320), and a main threading channel (330) is formed after the notches are closed; the upper seat (310) and the base (320) are also provided with tensile unit threading channels (340) with the number consistent with that of the buffer type tensile units (120).

9. The multi-functional composite island power cable according to claim 8, wherein:

the tensile unit threading channel (340) comprises a composite core threading hole (341) positioned in the center and a plurality of steel wire threading holes (342) surrounding the outer part of the composite core threading hole (341).

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