Multi-cavity suspension isolation type non-coaxial structure submarine cable

Abstract

The utility model discloses a kind of multi-cavity suspension isolation type non-coaxial structure submarine cable, including internal conductor, insulating cladding, suspension conduit, spiral outer conductor, hollow buoyancy layer and outer protective layer, the insulating cladding, suspension conduit, spiral outer conductor, hollow buoyancy layer and outer protective layer are annular structure, the insulating cladding sleeve joint in internal conductor outside, the suspension conduit sleeve joint in insulating cladding outside, the spiral outer conductor sleeve joint in suspension conduit outside, the hollow buoyancy layer sleeve joint in spiral outer conductor outside, the outer protective layer sleeve joint in hollow buoyancy layer outside. The utility model is introduced by design rectangular mechanics channel and spiral conductor layout, adapt to nonlinear deformation, so that submarine cable structure has hollow support and redundant protective layer, adapt to far sea extreme working condition.

Description

Technical Field

[0001] This utility model relates to the field of marine engineering, specifically a multi-cavity suspended isolation non-coaxial structure submarine cable. Background Technology

[0002] With the advancement of global marine resource development and large-scale offshore wind power construction, the offshore wind power industry is accelerating its expansion into deep-sea areas, and large-scale wind turbines are gradually becoming mainstream. However, traditional submarine cable technology is facing severe challenges. How to simultaneously meet the triple requirements of power transmission, signal control, and dynamic adaptation in existing submarine cables' "integrated coaxial structure" has become a critical technical bottleneck that urgently needs to be addressed. Currently, most existing submarine cable structures adopt a "conductor-insulation-tensile-sheath" coaxial layering model. Although the technology is mature, when facing deep-sea high pressure, complex currents, and long-term tensile forces, the conductive and mechanical systems share the external load, easily leading to problems such as difficulty in monitoring damage and difficulty in structural maintenance. Furthermore, traditional cylindrical coaxial structures lack buoyancy adjustment mechanisms and are unsuitable for floating wind turbines and dynamic bending scenarios.

[0003] To address the above problems, this invention provides a multi-cavity suspended isolation submarine cable structure. By incorporating a rectangular mechanical channel and a helical conductor layout, it adapts to nonlinear deformation, enabling the cable structure to possess hollow support and redundant protective layers, thus adapting to extreme working conditions in deep-sea environments. Utility Model Content

[0004] The purpose of this invention is to provide a multi-cavity suspended isolation non-coaxial structure submarine cable to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A multi-cavity suspended isolation non-coaxial submarine cable includes an inner conductor, an insulating sheath, a suspension guide tube, a helical outer conductor, a hollow buoyancy layer, and an outer protective layer. The insulating sheath, suspension guide tube, helical outer conductor, hollow buoyancy layer, and outer protective layer are all annular structures. The insulating sheath is sleeved on the outside of the inner conductor, the suspension guide tube is sleeved on the outside of the insulating sheath, the helical outer conductor is sleeved on the outside of the suspension guide tube, the hollow buoyancy layer is sleeved on the outside of the helical outer conductor, and the outer protective layer is sleeved on the outside of the hollow buoyancy layer.

[0006] Furthermore, the internal conductor is a flexible wire.

[0007] Furthermore, several piezoelectric ceramic blocks are embedded in the inner wall of the suspended conduit.

[0008] Furthermore, the suspended conduit is a polygonal tube.

[0009] Furthermore, the helical outer conductor comprises a left-hand helical liquid metal wire and a right-hand helical liquid metal wire.

[0010] Furthermore, the helix angle of the left-hand helical liquid metal wire is 40°-60°, and the helix angle of the right-hand helical liquid metal wire is 30°-40°.

[0011] Furthermore, a liquid metal channel is formed between the suspended conduit and the hollow buoyancy layer, and the liquid metal channel is filled with liquid metal, with the spiral outer conductor immersed in the liquid metal.

[0012] Furthermore, the hollow buoyancy layer is a polymer foam or an airbag structure.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1) Structural Breakthrough – Decoupling of Tension and Conductor. A rectangular suspended duct independently bears 100% of the mechanical load, while the internal conductor is suspended by shock-absorbing silicone to achieve zero-tension transmission, completely solving the problem of conductor fatigue fracture caused by stress concentration in coaxial structures.

[0014] 2) The concept of "buoyancy cable" was introduced into the system for the first time.

[0015] 3) Dual-channel inner and outer conductors: The spiral outer conductor adopts a 55° left-handed / 35° right-handed dual-path layout, which has redundancy and fault transfer capabilities, making it highly suitable for deep-sea and highly flexible environments. Attached Figure Description

[0016] Figure 1 This is a partial structural diagram of the present utility model.

[0017] Figure 2 This is a schematic diagram of the end face structure of this utility model.

[0018] In the diagram: 1. Inner conductor; 2. Insulating cladding; 3. Suspended conduit; 4. Spiral outer conductor; 5. Hollow buoyancy layer; 6. Outer protective layer; 7. Liquid metal channel. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1 and Figure 2A multi-cavity suspended isolation non-coaxial structure submarine cable includes an inner conductor 1, an insulating sheath 2, a suspension guide tube 3, a spiral outer conductor 4, a hollow buoyancy layer 5, and an outer protective layer 6. The insulating sheath 2, the suspension guide tube 3, the spiral outer conductor 4, the hollow buoyancy layer 5, and the outer protective layer 6 are all annular structures. The insulating sheath 2 is sleeved on the outside of the inner conductor 1, the suspension guide tube 3 is sleeved on the outside of the insulating sheath 2, the spiral outer conductor 4 is sleeved on the outside of the suspension guide tube 3, the hollow buoyancy layer 5 is sleeved on the outside of the spiral outer conductor 4, and the outer protective layer 6 is sleeved on the outside of the hollow buoyancy layer 5.

[0021] The internal conductor 1 is a flexible wire responsible for core power transmission, and it uses a combination of flexible wires. It is suspended within the channel of the suspended duct 3 and does not directly bear tension.

[0022] The insulating cladding 2 encloses the conductor for electrical isolation.

[0023] The suspended conduit 3 serves as a mechanical support structure, supporting the internal conductor 1 and preventing tension concentration on the battery core. Tension is decoupled from the conductor. Several piezoelectric ceramic blocks are embedded in the inner wall of the suspended conduit 3, covering the entire inner wall. Deformation of the suspended conduit 3 can be monitored through these piezoelectric ceramic blocks, thus serving a monitoring function. The suspended conduit 3 is a polygonal tube, preferably rectangular.

[0024] The outer spiral conductor 4 comprises a left-hand spiral liquid metal wire and a right-hand spiral liquid metal wire, both wound spirally around the suspension conduit 3. The right-hand spiral liquid metal wire is outside the left-hand spiral liquid metal wire. The spiral angle of the left-hand spiral liquid metal wire is 40°-60°, and the spiral angle of the right-hand spiral liquid metal wire is 30°-40°. The outer spiral conductor 4 provides redundant conductivity paths (the left-hand spiral liquid metal wire is the main path, and the right-hand spiral liquid metal wire is the backup path). It wraps around the outside of the suspension conduit 3 and can also serve as a signal or medium-voltage backup line. It possesses a certain degree of buffering and flexibility, making it suitable for dynamic environments.

[0025] Furthermore, a liquid metal channel 7 is formed between the suspended conduit 3 and the hollow buoyancy layer 5. The head and tail ends of the liquid metal channel 7 are closed. The liquid metal channel 7 is filled with liquid metal, which is a low-melting-point alloy such as gallium, indium, and tin. The spiral outer conductor 4 is immersed in the liquid metal. The liquid metal can fill the gaps and fill the gaps between the spiral liquid metal wires, thereby reducing the resistance.

[0026] The hollow buoyancy layer 5 is a structure made of polymer foam or airbag material. The hollow buoyancy layer 5 provides buoyancy, and the airbag material can be a polyester fiber composite material of polyvinyl chloride.

[0027] The outer protective layer 6 is made of high-density polyethylene, which is pressure-resistant and wear-resistant, and can withstand the impact of the seabed.

[0028] The main working principle is as follows: When the submarine cable is under stress, the external impact force is initially resisted by the outer protective layer 6, while the main mechanical load is borne by the suspension duct 3, whose internal piezoelectric ceramics monitor deformation in real time. During normal power transmission, the current is mainly transmitted through the internal conductor 1, with redundancy and low-resistance pathways provided by the spiral outer conductor 4 and the liquid metal channel 7. During the deployment and operation of the submarine cable, the hollow buoyancy layer 5 provides the necessary buoyancy, ensuring the cable's morphological stability in the deep sea and reducing environmental load.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-cavity suspended isolation non-coaxial submarine cable, characterized in that, It includes an inner conductor (1), an insulating sheath (2), a suspension conduit (3), a spiral outer conductor (4), a hollow buoyancy layer (5), and an outer protective layer (6). The insulating sheath (2), the suspension conduit (3), the spiral outer conductor (4), the hollow buoyancy layer (5), and the outer protective layer (6) are all annular structures. The insulating sheath (2) is fitted over the inner conductor (1), the suspension conduit (3) is fitted over the insulating sheath (2), the spiral outer conductor (4) is fitted over the suspension conduit (3), the hollow buoyancy layer (5) is fitted over the spiral outer conductor (4), and the outer protective layer (6) is fitted over the hollow buoyancy layer (5).

2. The multi-cavity suspended isolation non-coaxial submarine cable according to claim 1, characterized in that, The internal conductor (1) is a flexible wire.

3. The multi-cavity suspended isolation non-coaxial submarine cable according to claim 1, characterized in that, The inner wall of the suspended conduit (3) is embedded with several piezoelectric ceramic blocks.

4. The multi-cavity suspended isolation non-coaxial structure submarine cable according to claim 1, characterized in that, The suspended conduit (3) is a polygonal tube.

5. The multi-cavity suspended isolation non-coaxial submarine cable according to claim 1, characterized in that, The spiral outer conductor (4) includes a left-hand spiral liquid metal wire and a right-hand spiral liquid metal wire.

6. A multi-cavity suspended isolation non-coaxial submarine cable according to claim 5, characterized in that, The left-hand spiral liquid metal wire has a spiral angle of 40°-60°, and the right-hand spiral liquid metal wire has a spiral angle of 30°-40°.

7. A multi-cavity suspended isolation non-coaxial submarine cable according to claim 1, characterized in that, A liquid metal channel (7) is formed between the suspended conduit (3) and the hollow buoyancy layer (5), and the liquid metal channel (7) is filled with liquid metal, and the spiral outer conductor (4) is immersed in the liquid metal.

8. A multi-cavity suspended isolation non-coaxial submarine cable according to claim 1, characterized in that, The hollow buoyancy layer (5) is a polymer foam or airbag structure.

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