A high-voltage direct-current connection flexible cable for an electric ship
By designing a multi-layered structure and tensile components, the problems of insufficient resistance to salt spray, oil erosion, and flexibility of cables in electric ships have been solved, achieving stable power transmission and long service life of cables in marine environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI HUAYU CABLE GRP
- Filing Date
- 2025-08-27
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional cables cannot meet the requirements for resistance and flexibility to salt spray and oil pollution in marine environments, leading to frequent failures and making it difficult to install cables conveniently in confined spaces.
A multi-layer cable structure was designed, including a sliding lubrication layer, a shielding layer, a fireproof layer, a salt spray protection layer, an oil-resistant buffer layer, an inner sheath, a filling layer, and an insulation layer. Combined with tensile nylon filaments and tensile cotton rope, the cable's abrasion resistance, tensile strength, and electromagnetic interference protection are enhanced.
It improves the performance and lifespan of the cable, ensures the stability and safety of power transmission, and adapts to the complex operating conditions of electric ships.
Smart Images
Figure CN224536747U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of cable technology, specifically a high-voltage DC connection flexible cable for electric ships. Background Technology
[0002] Electric ships, with their significant advantages such as zero emissions, low noise, and high energy efficiency, have become a key direction for the sustainable development of the shipping industry and have received widespread attention and vigorous development in recent years. As electric ship technology continues to advance, the power demands of ships are increasing. High-voltage direct current (HVDC) systems, due to their unique advantages in reducing transmission losses, improving power transmission efficiency, and adapting to the complex electrical equipment of ships, are gradually becoming the mainstream choice for power systems in large electric ships. In the HVDC power transmission system, the HVDC connecting flexible cable, as a core component, bears the heavy responsibility of stably connecting the ship's power source (such as large-capacity battery packs, high-voltage shore power access ports, etc.) with the propulsion motor and various electrical equipment, achieving efficient power transmission.
[0003] In existing technologies, ships sail in marine or inland waterway environments for extended periods. Cables must not only withstand harsh weather and chemical factors such as strong salt spray and oil erosion, but also possess excellent flexibility to facilitate wiring in confined spaces. Traditional cables, due to performance limitations, cannot meet these requirements. These performance shortcomings lead to frequent failures of traditional flexible cables. To address this, we propose a high-voltage DC connection flexible cable for electric ships. Utility Model Content
[0004] The purpose of this utility model is to provide a high-voltage DC connection flexible cable for electric ships to solve the technical problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-voltage DC connection flexible cable for electric ships, comprising an outer sheath and multiple sets of conductors disposed within the outer sheath, wherein the conductors are provided with an insulation layer to prevent high-voltage DC leakage; The insulation layer is provided with an inner sheath to protect the conductor; The outer surface of the inner sheath is provided with an oil-resistant buffer layer to protect the insulation layer from wear. The oil-resistant buffer layer is provided with an anti-salt spray isolation layer on the outside, which is used to block salt spray and moisture in the marine environment from penetrating the internal structure and prevent the conductor from rusting.
[0006] Preferably, the outer sheath has a padding layer inside, and a filler layer is filled between the padding layer and the anti-salt spray isolation layer.
[0007] Preferably, a padding layer is provided on the outside of the filling layer, a fireproof layer is provided on the outer wall of the padding layer, and a shielding layer is provided between the fireproof layer and the outer sheath.
[0008] Preferably, the outer wall of the outer sheath is provided with a sliding lubrication layer.
[0009] Preferably, the sliding lubrication layer is a polytetrafluoroethylene micro powder coating or an ultra-high molecular weight polyethylene film, the shielding layer is a tin-plated copper wire braided mesh and an aluminum-plastic composite strip, and the fireproof layer is flame-retardant silicone rubber.
[0010] Preferably, the anti-salt spray isolation layer is a polyvinylidene fluoride film, the oil-resistant buffer layer is a hydrogenated nitrile rubber foam, the filler layer is a PP rope, and the padding layer is chloroprene rubber or foamed ethylene propylene rubber.
[0011] Preferably, the inner wall of the insulating layer is provided with tensile nylon filaments; Multiple sets of tensile cotton ropes are arranged inside the filling layer and along the length of the conductor.
[0012] Preferably, the insulating layer is weather-resistant silicone rubber.
[0013] Compared with the prior art, the beneficial effects of this utility model are: (1) This utility model combines a sliding lubrication layer, a shielding layer, a fireproof layer, a salt spray isolation layer, an oil-resistant buffer layer, an inner sheath, a filling layer, a padding layer, and an insulation layer. The sliding lubrication layer reduces friction and protects the outer sheath, the shielding layer resists electromagnetic interference, the fireproof layer is flame-retardant and ensures safety, the oil-resistant buffer layer buffers vibration, the inner sheath prevents oil contamination and protects the insulation layer, and the padding layer coordinates interlayer friction and improves stability. All layers work together to adapt to the working conditions of electric ships, thereby improving the performance and service life of the flexible cable.
[0014] (2) This utility model combines designed tensile nylon filaments and tensile cotton ropes. The tensile nylon filaments are located between the conductors to share the tensile force with high strength and prevent conductor breakage. The tensile cotton ropes are placed in the filling layer to help share the tensile force. The combination of the two enhances the tensile performance of the cable from both between the conductors and in the filling layer, adapts to ship vibration and towing conditions, and ensures stable power transmission. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the conductor and tensile nylon filament structure of this utility model; In the diagram: 1. Sliding lubrication layer; 2. Shielding layer; 3. Outer sheath; 4. Fireproof layer; 5. Tensile cotton rope; 6. Salt spray isolation layer; 7. Oil-resistant buffer layer; 8. Inner sheath; 9. Conductor; 10. Filling layer; 11. Tensile nylon filament; 12. Pad layer; 13. Insulation layer. Detailed Implementation
[0016] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0017] Example 1 Please see Figure 1 and Figure 2 This utility model provides a technical solution: a high-voltage DC connection flexible cable for electric ships, including an outer sheath 3 and multiple sets of conductors 9 disposed inside the outer sheath 3. The outer sheath 3 is made of neoprene rubber, and an insulation layer 13 is provided on the outside of the conductors 9 to prevent high-voltage DC leakage. The conductors 9 are made of fine soft copper wires twisted together. This structure allows the soft copper wires to produce small displacements when the conductor is bent, thus exhibiting very good flexibility and bending performance. It is not easy to break even after repeated bending and can be used for wiring in narrow spaces. An inner sheath 8 is provided on the outside of the insulation layer 13. The inner sheath 8 is made of nitrile rubber and is used to protect the conductor 9. The inner sheath 8 is provided with an oil-resistant buffer layer 7 on the outside to protect the insulation layer 13 from abrasion; The oil-resistant buffer layer 7 is provided with an anti-salt spray isolation layer 6 on the outside, which is used to block salt spray and moisture in the marine environment from penetrating the internal structure, prevent the conductor 9 from rusting, and make the conductivity and power transmission of the conductor 9 more stable.
[0018] Example 2 Please refer to Example 1. Figure 1 and Figure 2 The outer sheath 3 has a padding layer 12 inside, and a filling layer 10 is filled between the padding layer 12 and the anti-salt spray isolation layer 6. A padding layer 12 is provided on the outside of the filling layer 10, a fireproof layer 4 is provided on the outer wall of the padding layer 12, and a shielding layer 2 is provided between the fireproof layer 4 and the outer sheath 3. The outer wall of the outer sheath 3 is provided with a sliding lubrication layer 1 to reduce the frictional resistance when the cable comes into contact with the ship's metal support and pipes; The sliding lubrication layer 1 is a polytetrafluoroethylene micro-powder coating or ultra-high molecular weight polyethylene film, which reduces the frictional resistance when the cable comes into contact with the ship's metal support and pipes, making it easier to drag and bend during installation. At the same time, it reduces the wear of the outer sheath 3 caused by long-term vibration and improves durability. The shielding layer 2 is a tin-plated copper wire braided mesh and an aluminum-plastic composite tape. The aluminum-plastic composite tape is located outside the fireproof layer 4, and the tin-plated copper wire braided mesh is located outside the aluminum-plastic composite tape. The double shielding structure can effectively isolate the electromagnetic interference generated by high voltage DC transmission and avoid interference with ship navigation and communication equipment. The tin-plated copper wire ensures the conductivity and corrosion resistance of the shielding layer 2, and the aluminum-plastic tape enhances the shielding seal. The braided structure maintains the flexibility of the cable. The fireproof layer 4 is a flame-retardant silicone rubber, which produces low smoke and halogen-free combustion and does not release toxic gases, meeting the requirements of ship fire safety. It has good flexibility, does not affect the bending performance of the cable, and has strong weather resistance, which can adapt to the humid heat and salt spray corrosion of the marine environment. The anti-salt spray isolation layer 6 is a polyvinylidene fluoride film. Utilizing the excellent weather resistance and impermeability of the polyvinylidene fluoride film, it blocks salt spray and moisture from the marine environment from penetrating the internal structure and prevents the conductor 9 from corroding. At the same time, the film is thin and soft, which does not affect the overall flexibility of the cable. The oil-resistant buffer layer 7 is a hydrogenated nitrile rubber foam. Utilizing the elasticity of the foam structure, it buffers the mechanical stress generated by ship vibration and bending, protecting the insulation layer 13 from wear. The filling layer 10 is a PP rope, which can fill the gap between the anti-salt spray isolation layer 6 and the padding layer 12. The padding layer 12 is made of neoprene rubber or foamed ethylene propylene rubber, which can buffer and protect the inner layer (each layer inside the filling layer 10) structure and enhance the overall stability.
[0019] Example 3 Please refer to Example 2. Figure 1 and Figure 2 The inner wall of the insulation layer 13 is provided with tensile nylon filaments 11, and the tensile nylon filaments 11 are located between multiple sets of conductors 9. The tensile nylon filaments 11 have the characteristics of high strength and high toughness. When arranged parallel to the conductors 9, they can share the longitudinal tensile force on the cable during installation and wiring (such as dragging and hanging) or ship vibration and turbulence, so as to prevent the conductors 9 from breaking due to excessive stretching and ensure the continuity of power transmission. Multiple sets of tensile cotton ropes 5 are arranged inside the filling layer 10 and along the length of the conductor 9. The tensile cotton ropes 5 have a certain toughness and strength. They are usually distributed between the conductors 9 or inside the insulation layer 13 along the length of the conductor 9. They can share the longitudinal tension of the cable when it is being dragged during installation, ship vibration or turbulence, and prevent the conductor 9 from breaking due to excessive stretching, thus ensuring the continuity of power transmission. The insulation layer 13 is made of weather-resistant silicone rubber. The silicone rubber has a stable molecular structure and excellent resistance to salt spray, humidity, ozone and marine oil pollution in the marine environment. It is not prone to aging, cracking or swelling after long-term use. It can prevent moisture and salt from penetrating into the conductor 9 and maintain the long-term stability of insulation performance.
[0020] The above embodiments are only used to illustrate the technical methods of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of this utility model without departing from the spirit and scope of the technical methods of this utility model.
Claims
1. A high-voltage DC connecting flexible cable for electric ships, comprising an outer sheath (3) and multiple sets of conductors (9) disposed within the outer sheath (3), characterized in that, An insulating layer (13) is provided on the outside of the conductor (9) to prevent leakage of high voltage direct current; The insulation layer (13) is provided with an inner sheath (8) to protect the conductor (9). The inner sheath (8) is provided with an oil-resistant buffer layer (7) on the outside to protect the insulation layer (13) from wear; The oil-resistant buffer layer (7) is provided with an anti-salt spray isolation layer (6) on the outside, which is used to block the salt spray and moisture in the marine environment from penetrating the internal structure and prevent the conductor (9) from rusting.
2. The high-voltage DC connection flexible cable for electric ships according to claim 1, characterized in that: The outer sheath (3) has a pad (12) inside, and a filler layer (10) is filled between the pad (12) and the anti-salt spray isolation layer (6).
3. The high-voltage DC connecting flexible cable for electric ships according to claim 2, characterized in that: The filling layer (10) is provided with a padding layer (12) on the outside, and the outer wall of the padding layer (12) is provided with a fireproof layer (4). A shielding layer (2) is provided between the fireproof layer (4) and the outer sheath (3).
4. The high-voltage DC connection flexible cable for electric ships according to claim 3, characterized in that: The outer wall of the outer sheath (3) is provided with a sliding lubrication layer (1).
5. A high-voltage DC connecting flexible cable for electric ships according to claim 4, characterized in that: The sliding lubrication layer (1) is a polytetrafluoroethylene micro powder coating or an ultra-high molecular weight polyethylene film, the shielding layer (2) is a tin-plated copper wire braided mesh and an aluminum-plastic composite strip, and the fireproof layer (4) is flame-retardant silicone rubber.
6. A high-voltage DC connecting flexible cable for electric ships according to claim 2, characterized in that: The anti-salt spray isolation layer (6) is a polyvinylidene fluoride film, the oil-resistant buffer layer (7) is a hydrogenated nitrile rubber foam, the filler layer (10) is a PP rope, and the padding layer (12) is chloroprene rubber or foamed ethylene propylene rubber.
7. A high-voltage DC connecting flexible cable for electric ships according to claim 6, characterized in that: The inner wall of the insulating layer (13) is provided with tensile nylon filaments (11). Multiple sets of tensile cotton ropes (5) are arranged inside the filling layer (10) and along the length direction of the conductor (9).
8. A high-voltage DC connecting flexible cable for electric ships according to claim 7, characterized in that: The insulating layer (13) is weather-resistant silicone rubber.