Multifunctional submarine cable for offshore wind power

Abstract

The utility model discloses a multifunctional submarine cable for offshore wind power, which comprises a body, a plurality of uniformly distributed core wires are arranged on the inner side of the body, the core wires comprise a plurality of electric unit core wires (1) and a pipeline unit core wire (2), the diameter of the pipeline unit core wire (2) is the same as that of the electric unit core wires (1), and the diameter of the pipeline unit core wire (2) is the same as that of the electric unit core wires (1). And a reinforcing layer (2.1) for preventing the pipeline unit core wire (2) from deforming is arranged on the outer layer of the pipeline unit core wire (2). The utility model provides the multifunctional submarine cable for offshore wind power, which integrates a gas transportation pipeline and an electric unit core wire, so that the submarine cable has an electric signal transmission function and a gas transportation function at the same time, the laying work amount is reduced, and the electric signal transmission and the gas transportation are ensured not to interfere with each other.

Description

Technical Field

[0001] The utility model relates to the field of submarine cables, in particular to a multifunctional submarine cable for offshore wind power. Background Art

[0002] With the rapid development of offshore wind power, problems such as the difficulty of large-scale grid connection and absorption of offshore wind power and the high cost of deep-sea power transmission have become prominent. Using the extra sea wind resources for hydrogen production is an effective way to solve the absorption and transmission problems, and turn abandoned electricity into valuable hydrogen. Traditional wind power submarine cables are mostly used to undertake the functions of power transmission and signal transmission. Only a small number of pipelines dedicated to gas transportation are used to transport hydrogen. That is, the transportation of electrical signals, optical signals and gas transportation are independent of each other, resulting in multiple laying processes of submarine cables and pipelines, and it is also necessary to ensure that there will be no interference between the two during the laying process, which requires a larger amount of engineering. It is impossible to transport the valuable hydrogen after electrolysis to land, and the cost of building another transmission channel is high. In addition, the requirements of deep-sea wind power development, marine environmental protection and intensive use of the sea urgently need to develop multifunctional environmentally friendly submarine power cables that can meet both power transmission and hydrogen transportation under the conditions of complex deep-sea waters. At present, the insulation material used in existing submarine cables is generally cross-linked polyethylene material, which is heavily dependent on imports and is a thermosetting material. After reaching the end of its service life, the cross-linked polyethylene is difficult to recycle and reuse, and can only be incinerated or landfilled, resulting in energy waste and pollution of the marine environment. It is not only inconsistent with the current international sustainable development resource application concept, but also puts tremendous pressure on marine environmental protection. The submarine cable using polypropylene as the base material can not only achieve lane overtaking and break the monopoly of foreign countries on high-end submarine cable insulation materials, but also polypropylene as the insulation material of the submarine cable not only greatly improves the electrical performance, but also can be recycled and reused to meet the requirements of marine environmental protection. Traditional deep-sea DC submarine cables are laid separately, with high cost of double circuits, large sea area and high cost investment. The two DC submarine cable core wires are combined into a composite gas transmission pipeline into a 3-core multifunctional submarine power cable to meet the future deep-sea "offshore wind power + wind power hydrogen production" new economic model of "electricity" and "hydrogen" transmission needs, realize the comprehensive development and utilization of the marine economy, and help the development of the offshore wind power industry. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a multifunctional submarine cable for offshore wind power that combines a gas transport pipeline and an electrical unit core wire in a design so that the submarine cable has both an electrical signal transmission function and a gas transport function, while reducing the amount of laying engineering and ensuring that there is no interference between electrical signal transmission and gas transportation.

[0004] The technical solution adopted by the utility model to solve the above-mentioned problem is: a multifunctional submarine cable for offshore wind power, including a main body, the inner side of the main body includes a plurality of evenly distributed core wires, the core wires include a plurality of electrical unit core wires and a pipeline unit core wire, the wire diameter of the pipeline unit core wire is the same as the wire diameter of the electrical unit core wire, and the outer layer of the pipeline unit core wire is provided with a reinforcement layer for preventing the pipeline unit core wire from deforming.

[0005] Compared with the prior art, the advantages of the utility model are: first, multiple electrical unit core wires and one pipeline unit core wire are all arranged in one submarine cable, so that the electrical unit core wire and the pipeline unit core wire are integrated, so that the submarine cable has both the electrical signal transmission function and the gas transportation function. Because there is only one submarine cable and no gas pipeline, the amount of laying engineering is reduced, and because of the dynamic synchronization of the electrical unit core wire and the pipeline unit core wire, there is no need to worry about the interference between the two during use. At the same time, in the design process, because the head and tail connection sections of the submarine cable are dynamic, the internal core wire of the submarine cable needs to have bendable flexibility and the core wires need to squeeze each other to resist each other. Resistance. Since the electrical unit core wire is a solid structure, while the pipeline unit core wire is a hollow structure, the pipeline unit core wire is easily squeezed and deformed, so it is necessary to strengthen the pipeline unit core wire's anti-extrusion deformation ability through the structure of the reinforcement layer. During the design process, the wire diameter of the electrical unit core wire is not easy to change, while the pipe diameter of the pipeline unit core wire can be changed as needed. The pipe diameter is adjusted to achieve the same design as the wire diameter of the pipeline unit core wire. The interaction force between the pipeline unit core wire and the electrical unit core wire can be made more uniform, and the synchronization is stronger in both bending deformation and mutual extrusion processes, which can effectively reduce the probability of deformation of the pipeline unit core wire.

[0006] As an improvement of the present invention, the pipeline unit core wire includes a gas transmission steel pipe, the reinforcement layer includes a reinforcement steel pipe and a supporting PE wire, the supporting PE wire is mesh-wrapped on the outer layer of the gas transmission steel pipe, and the reinforcement steel pipe is sleeved on the outer layer of the supporting PE wire. Through the improvement, if the thickness of the gas transmission steel pipe is directly increased, although the anti-extrusion deformation ability of the gas transmission steel pipe can be increased, the dynamic deformation ability is poor. Through the structural design of the reinforcement steel pipe and the supporting PE wire distributed in a mesh-wrapped manner, on the premise of meeting the dynamic deformation ability, the structure of the reinforcement steel pipe and the supporting PE wire will mainly bear the force of anti-extrusion deformation, so that the degree of extrusion deformation of the gas transmission steel pipe is greatly reduced, thereby ensuring the integrity of the gas transmission steel pipe.

[0007] As an improvement of the utility model, the outer layer of the reinforced steel pipe is provided with an insulating layer. Through the improvement, the electric unit core wire is prevented from forming a voltage difference with the reinforced steel pipe in the pipeline unit core wire during use, thereby preventing the problem of electrical breakdown.

[0008] As an improvement of the utility model, there are two electrical unit core wires, and the two electrical unit core wires and a pipeline unit core wire are arranged tangent to each other. Through the improvement, the roundness of the submarine cable is ensured, and the use is more stable in a dynamic environment.

[0009] As an improvement of the present invention, the number of the electrical unit core wires is three, four or five, and the electrical unit core wires are arranged in a uniform array along the outer ring of the pipeline unit core wire. A forming frame is provided between the pipeline unit core wire and the electrical unit core wire, and the forming frame includes a pipeline unit positioning area for positioning the pipeline unit core wire and an electrical unit positioning area for respectively positioning a plurality of electrical unit core wires. Through the improvement, the roundness of the submarine cable molding can be ensured, and the use is more stable in a dynamic environment. Through the design of the forming frame, the distribution position of the electrical unit core wires is stabilized, the uniformity of the force on the pipeline unit core wires can be ensured, and the service life of the pipeline unit core wires can be extended.

[0010] As an improvement of the present invention, the number of the electrical unit core wires is six, and the electrical unit core wires are arranged in a uniform array along the outer ring of the pipeline unit core wire, and the six electrical unit core wires are arranged end to end along the circumference of the pipeline unit core wire. Through the improvement, the roundness of the submarine cable can be guaranteed, and the use is more stable in a dynamic environment, and the uniformity of the force on the pipeline unit core wire can be guaranteed, thereby extending the service life of the pipeline unit core wire.

[0011] As an improvement of the utility model, the number of the electric unit core wires is not less than seven, the outer layer of the pipeline unit core wire is provided with a filling layer and a shaping ring in sequence, the electric unit core wires are arranged in a uniform array along the outer ring of the shaping ring, and a plurality of the electric unit core wires are arranged end to end along the circumference of the pipeline unit core wire. Through the improvement, the roundness of the submarine cable molding can be ensured, and the use is more stable in a dynamic environment. Through the design of the shaping ring, the distribution position of the electric unit core wires is stabilized. At the same time, the mutual extrusion force between the electric unit core wires and the pipeline unit core wires adds a buffer zone, which prolongs the service life of the pipeline unit core wire.

[0012] As an improvement of the utility model, the outer layers of the electric unit core wire and the pipeline unit core wire are provided with an outer shielding layer for extruding the electric unit core wire and the pipeline unit core wire, and the outer layer of the outer shielding layer is provided with a semiconducting resistance water tape. Through the improvement, the function of the outer shielding layer is to prevent electromagnetic interference between the inside and the outside, and the function of the semiconducting resistance water tape is to prevent seawater from penetrating into the interior of the submarine cable.

[0013] As an improvement of the utility model, an aluminum alloy sheath layer is further provided between the semi-conductive water-resistant tape and the outer shielding layer. Through the improvement, it is more environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the cross-sectional structure of two electrical unit core wires of the utility model.

[0015] Figure 2 It is a schematic diagram of the cross-sectional structure of the core wire of the pipeline unit of the utility model.

[0016] Figure 3 It is a schematic diagram of the cross-sectional structure of three electrical unit core wires of the utility model.

[0017] Figure 4 It is a schematic diagram of the cross-sectional structure of four electrical unit core wires of the utility model.

[0018] Figure 5 It is a schematic diagram of the cross-sectional structure of five electrical unit core wires of the utility model.

[0019] Figure 6 It is a schematic diagram of the cross-sectional structure of six electrical unit core wires of the utility model.

[0020] Figure 7 It is a schematic diagram of the cross-sectional structure of seven electrical unit core wires of the utility model.

[0021] As shown in the figure: 1. Electric unit core wire, 2. Pipe unit core wire, 2.1. Reinforcement layer, 2.1.1. Reinforced steel pipe, 2.1.2. Support PE wire, 2.2. Gas transmission steel pipe, 2.3. Insulation layer, 3. Shaping frame, 4. Shaping ring, 5. Filling layer, 6. Outer shielding layer, 7. Semiconductor resistance water hose, 8. Aluminum alloy sheath layer, 9. Inner shielding layer, 10. Optical unit core wire, 11. Armor layer, 12. PP outer sheath. DETAILED DESCRIPTION

[0022] The embodiments of the present utility model are further described below in conjunction with the accompanying drawings.

[0023] like Figure 1-7As shown, a multifunctional submarine cable for offshore wind power generation comprises a body, wherein the inner side of the body comprises a plurality of uniformly distributed core wires, wherein the core wires comprise a plurality of electrical unit core wires (1) and a pipeline unit core wire (2), wherein the wire diameter of the pipeline unit core wire (2) is the same as the wire diameter of the electrical unit core wire (1), and the outer layer of the pipeline unit core wire (2) is provided with a reinforcing layer (2.1) for preventing the pipeline unit core wire (2) from deforming, wherein the pipeline unit core wire (2) comprises a gas transmission steel pipe (2.2), wherein the reinforcing layer (2.1) comprises a reinforcing steel pipe (2.1.1) and a supporting PE wire (2.1.2), wherein the supporting The PE wire (2.1.2) is wrapped around the outer layer of the gas transmission steel pipe (2.2) in a mesh shape, the reinforcing steel pipe (2.1.1) is sleeved on the outer layer of the supporting PE wire (2.1.2), the outer layer of the reinforcing steel pipe (2.1.1) is provided with an insulating layer (2.3), the outer layers of the electric unit core wire (1) and the pipeline unit core wire (2) are provided with an outer shielding layer (6) for extruding the electric unit core wire (1) and the pipeline unit core wire (2), the outer layer of the outer shielding layer (6) is provided with a semi-conductive water-resistant tape (7), and an aluminum alloy sheath layer (8) is also provided between the semi-conductive water-resistant tape (7) and the outer shielding layer (6).

[0024] The outer layer of each electric unit core wire (1) and pipeline unit core wire (2) is provided with an inner shielding layer (9) for preventing electromagnetic interference between the electric unit core wire (1) and the pipeline unit core wire (2).

[0025] At the same time, optical unit core wires (10) can also be installed in the gaps between the electrical unit core wires (1), thereby further improving the composite function of the submarine cable.

[0026] In order to ensure the stability of the submarine cable structure, a filling layer (5) formed of a filling material is provided between the electrical unit core wire (1) and the pipeline unit core wire (2), and the filling layer (5) is extruded synchronously.

[0027] like Figure 1 As shown, there are two electrical unit core wires (1), and the two electrical unit core wires (1) and a pipeline unit core wire (2) are arranged to be tangent to each other.

[0028] like Figure 3-5 As shown, the number of the electric unit core wires (1) is three, four or five, and the electric unit core wires (1) are arranged in a uniform array along the outer ring of the pipeline unit core wire (2). A forming frame (3) is provided between the pipeline unit core wire (2) and the electric unit core wire (1), and the forming frame (3) includes a pipeline unit positioning area for positioning the pipeline unit core wire (2) and an electric unit positioning area for respectively positioning a plurality of electric unit core wires (1).

[0029] like Figure 6As shown, the number of the electrical unit core wires (1) is six, and the electrical unit core wires (1) are arranged in a uniform array along the outer circle of the pipeline unit core wire (2), and the six electrical unit core wires (1) are arranged end to end along the circumference of the pipeline unit core wire (2).

[0030] like Figure 7 As shown, the number of the electric unit core wires (1) is not less than seven, the outer layer of the pipeline unit core wire (2) is provided with a filling layer (5) and a shaping ring (4) in sequence, the electric unit core wires (1) are arranged in a uniform array along the outer ring of the shaping ring (4), and a plurality of the electric unit core wires (1) are arranged end to end along the circumference of the pipeline unit core wire (2).

[0031] The insulating layer (2.3), the inner shielding layer (9) and the outer shielding layer (6) are all made of polypropylene material. However, the inner shielding layer (9) and the outer shielding layer (6) have been modified, which not only greatly improves the electrical performance but also can be recycled and reused to meet the requirements of marine environmental protection.

[0032] The semi-conductive water-resistant tape (7) adopts a double-layer nylon water cloth tape, an armor layer (11) is arranged on the outer layer of the semi-conductive water-resistant tape (7), and a PP outer sheath (12) is arranged on the outer surface of the armor layer (11).

[0033] Through one-time laying, the three-core composite structure design of electrical signal transmission, optical signal transmission and hydrogen transportation is realized, which greatly optimizes the demand for sea area for laying and halves the laying construction cycle, making it efficient and economical. Polypropylene material is used, which has large transmission capacity and is environmentally friendly. The normal operating temperature can be increased from 90°C to 110°C. No cross-linking process is required during the extrusion process, and expensive imported equipment monopolized by foreign countries is no longer needed. No scorched particles are produced, and continuous production of large lengths of submarine cables without joints can be achieved.

[0034] The above description is only for the best embodiment of the utility model, but it cannot be understood as a limitation of the claims. The utility model is not limited to the above embodiments, and its specific structure is allowed to be changed. All changes made within the protection scope of the independent claims of the utility model are within the protection scope of the utility model.

Claims

1. A multifunctional submarine cable for offshore wind power, characterized in that: The invention comprises a main body, wherein the inner side of the main body comprises a plurality of evenly distributed core wires, wherein the core wires comprise a plurality of electrical unit core wires (1) and a pipeline unit core wire (2), wherein the wire diameter of the pipeline unit core wire (2) is the same as the wire diameter of the electrical unit core wire (1), and the outer layer of the pipeline unit core wire (2) is provided with a reinforcement layer (2.1) for preventing the pipeline unit core wire (2) from deforming.

2. According to claim 1, a multifunctional submarine cable for offshore wind power, characterized in that: The pipeline unit core wire (2) comprises a gas transmission steel pipe (2.2), the reinforcement layer (2.1) comprises a reinforcement steel pipe (2.1.1) and a supporting PE wire (2.1.2), the supporting PE wire (2.1.2) is wrapped around the outer layer of the gas transmission steel pipe (2.2) in a mesh shape, and the reinforcement steel pipe (2.1.1) is sleeved on the outer layer of the supporting PE wire (2.1.2).

3. A multifunctional submarine cable for offshore wind power according to claim 2, characterized in that: The outer layer of the reinforced steel pipe (2.1.1) is provided with an insulating layer (2.3).

4. According to claim 1, a multifunctional submarine cable for offshore wind power generation, characterized in that: There are two electrical unit core wires (1), and the two electrical unit core wires (1) and a pipeline unit core wire (2) are arranged to be tangent to each other.

5. According to claim 1, a multifunctional submarine cable for offshore wind power, characterized in that: The number of the electric unit core wires (1) is three, four or five, and the electric unit core wires (1) are arranged in a uniform array along the outer ring of the pipeline unit core wire (2). A shaping frame (3) is provided between the pipeline unit core wire (2) and the electric unit core wire (1), and the shaping frame (3) comprises a pipeline unit positioning area for positioning the pipeline unit core wire (2) and an electric unit positioning area for respectively positioning a plurality of electric unit core wires (1).

6. The multifunctional submarine cable for offshore wind power according to claim 1, characterized in that: The number of the electrical unit core wires (1) is six, and the electrical unit core wires (1) are arranged in a uniform array along the outer circle of the pipeline unit core wire (2), and the six electrical unit core wires (1) are arranged end to end along the circumference of the pipeline unit core wire (2).

7. The multifunctional submarine cable for offshore wind power according to claim 1, characterized in that: The number of the electric unit core wires (1) is not less than seven, the outer layer of the pipeline unit core wire (2) is provided with a filling layer (5) and a shaping ring (4) in sequence, the electric unit core wires (1) are arranged in a uniform array along the outer ring of the shaping ring (4), and a plurality of the electric unit core wires (1) are arranged end to end along the circumference of the pipeline unit core wire (2).

8. The multifunctional submarine cable for offshore wind power according to claim 1, characterized in that: The outer layers of the electric unit core wire (1) and the pipeline unit core wire (2) are provided with an outer shielding layer (6) for extruding the electric unit core wire (1) and the pipeline unit core wire (2), and the outer layer of the outer shielding layer (6) is provided with a semi-conductive water-resistant tape (7).

9. A multifunctional submarine cable for offshore wind power according to claim 8, characterized in that: An aluminum alloy sheath layer (8) is also provided between the semi-conductive water-resistant tape (7) and the outer shielding layer (6).

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