Corrosion-resistant multi-core cable for marine engineering

Abstract

This utility model discloses a corrosion-resistant multi-core cable for marine engineering, relating to the field of cable technology. The corrosion-resistant multi-core cable for marine engineering includes a conductor, an anti-corrosion layer on the outside of the conductor, an insulation layer on the outside of the anti-corrosion layer, a sub-shielding anti-corrosion layer on the outside of the sub-shielding layer, a water-blocking adhesive layer inside the core filling layer, a core wrapping layer on the outside of the core where the core filling layer is located, an inner sheath on the outside of the core wrapping layer, an armor base layer on the outside of the inner sheath, an armor layer on the outside of the armor base layer, a water-blocking buffer layer on the outside of the armor layer, and an outer sheath reinforcement layer and an outer sheath on the outside of the water-blocking buffer layer. This forms a multi-layered anti-corrosion structure from the inside out. The conductor anti-corrosion layer, the sub-shielding anti-corrosion layer, the epoxy powder coating of the armor layer, the outer sheath, and the anti-corrosion coating work synergistically to effectively resist corrosion from seawater, salt spray, and other marine environments, extending the cable's service life.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a corrosion-resistant multi-core cable for marine engineering. Background Technology

[0002] In marine engineering, cables, as key components for power and signal transmission, face severe environmental challenges. Seawater contains a large amount of salt and corrosive substances, which can cause serious corrosion to the conductors and insulation layers of cables. The high humidity and salt spray in the marine environment accelerate the aging of cables. At the same time, marine engineering equipment will generate vibration and impact during operation, and submarine cables may also be subject to mechanical damage from rocks, fishing gear, etc. Traditional cables have a simple structure but insufficient corrosion resistance and water resistance. In marine environments, they are prone to problems such as conductor corrosion, insulation aging, and unstable signal transmission. They have a short service life and require frequent replacement, which increases the cost and maintenance difficulty of marine engineering projects. In addition, traditional cables have poor shielding performance, making signals susceptible to interference in complex electromagnetic environments, which can affect the normal operation of marine engineering equipment; moreover, their mechanical strength is insufficient to withstand the external forces in the marine environment, making them prone to breakage and other failures. To address these issues, it is necessary to design a multi-core cable for marine engineering with excellent corrosion resistance, water resistance, shielding, and mechanical properties to meet the needs of marine engineering projects. Utility Model Content

[0003] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a corrosion-resistant multi-core cable for marine engineering that can solve the above-mentioned problems.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a corrosion-resistant multi-core cable for marine engineering, comprising a conductor, wherein a conductor anti-corrosion layer is provided on the outside of the conductor, and the conductor anti-corrosion layer is directly covered on the surface of the conductor; An insulating layer is provided on the outside of the conductor anti-corrosion layer, and an insulating isolation layer is provided on the outside of the insulating layer. An inner shielding layer is provided on the outside of the insulating isolation layer, and a secondary shielding layer is provided on the outside of the inner shielding layer. A secondary shielding anti-corrosion layer is provided on the outside of the secondary shielding layer, and the secondary shielding anti-corrosion layer is coated on the outside of the secondary shielding layer.

[0005] Preferably, the insulating layer is extruded onto the outside of the conductor anti-corrosion layer.

[0006] Preferably, the inner shielding layer covers the outside of the insulating layer by overlapping and wrapping semiconducting strips.

[0007] Preferably, after the cores containing the shielding and anti-corrosion layer are twisted together, the gaps are filled with a cable core filling layer, and a water-blocking adhesive layer is provided inside the cable core filling layer.

[0008] Preferably, a cable core wrapping layer is provided on the outside of the cable core where the cable core filling layer is located, and an inner sheath is provided on the outside of the cable core wrapping layer.

[0009] Preferably, the outer side of the inner sheath is provided with an armor base layer, the outer side of the armor base layer is provided with an armor layer, and the outer side of the armor layer is provided with a water-resistant buffer layer.

[0010] Preferably, the water-blocking buffer layer is provided with an outer sheath reinforcement layer and an outer sheath on the outside, the outer sheath is provided with an anti-corrosion coating, and an identification strip is provided on the outside of the outer sheath.

[0011] Preferably, the outer sheath reinforcement layer is composited on the inner side of the outer sheath.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This corrosion-resistant multi-core cable for marine engineering has a multi-layered anti-corrosion structure from the inside out. The conductor anti-corrosion layer, the shielding anti-corrosion layer, the epoxy powder coating of the armor layer, the outer sheath and the anti-corrosion coating work together to effectively resist the corrosion of marine environments such as seawater and salt spray, and extend the service life of the cable.

[0013] 2. This corrosion-resistant multi-core cable for marine engineering features water-blocking yarn in the core filling layer that expands upon contact with water, a water-blocking adhesive layer that fills the gaps, and a water-blocking buffer layer that blocks lateral penetration. This multi-layered water-blocking structure effectively prevents moisture from entering the cable, protecting the conductor and insulation layer and ensuring stable transmission. The inner shielding layer and sub-shielding layer reduce electromagnetic interference and signal crosstalk, ensuring the stability of power and signal transmission, making it particularly suitable for high-frequency signal transmission scenarios.

[0014] 3. This corrosion-resistant multi-core cable for marine engineering features an insulation layer that buffers bending stress, an armor layer that enhances mechanical strength, and an outer sheath reinforcement layer that improves tensile strength. This allows the cable to withstand external forces such as vibration, impact, and towing in the marine environment. The tightly integrated layer structure, the cable core wrapping layer that fixes the core, and the armor base layer that enhances adhesion ensure that the cable is not easily loosened or damaged during long-term use and is suitable for complex marine engineering environments. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of a corrosion-resistant multi-core cable for marine engineering according to this utility model; Figure 2 This is a schematic cross-sectional view of a corrosion-resistant multi-core cable for marine engineering according to this utility model; Figure 3This is a schematic cross-sectional view of a corrosion-resistant multi-core cable for marine engineering according to this utility model; Figure 4 This utility model Figure 1 Enlarged diagram of point A in the middle.

[0016] Reference numerals: 1. Conductor; 2. Conductor anti-corrosion layer; 3. Insulation layer; 4. Insulation isolation layer; 5. Inner shielding layer; 6. Sub-shielding layer; 7. Sub-shielding anti-corrosion layer; 8. Cable core filling layer; 9. Water-blocking adhesive layer; 10. Cable core wrapping layer; 11. Inner sheath; 12. Armor base layer; 13. Armor layer; 14. Water-blocking buffer layer; 15. Outer sheath reinforcement layer; 16. Outer sheath; 17. Anti-corrosion coating; 18. Identification tape. Detailed Implementation

[0017] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0018] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0020] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0021] Please see Figure 1-4This utility model provides a technical solution: a corrosion-resistant multi-core cable for marine engineering, including a conductor 1, which is located at the core of the cable and is a conductor made of multiple strands of annealed soft copper wires twisted together, providing the basic carrier for the power and signal transmission of the entire cable. A conductor anti-corrosion layer 2 is provided on the outside of the conductor 1, which is directly covered on the surface of the conductor 1 and located between the conductor 1 and the subsequent tin plating layer. The nickel coating is attached by electroplating process, which adds the first anti-corrosion barrier to the conductor 1. An insulating layer 3 is provided on the outside of the conductor anti-corrosion layer 2. The insulating layer 3 is extruded on the outside of the conductor anti-corrosion layer 2 and tightly adheres to the conductor anti-corrosion layer 2. The weather-resistant cross-linked polyethylene material is used to isolate the electrical connection between different conductors 1 to prevent short circuits. An insulating isolation layer 4 is provided on the outside of the insulating layer 3. The insulating isolation layer 4 forms a thin layer on the outside of the insulating layer 3 and is made of EPDM rubber material to enhance the bonding force between the insulating layer 3 and the outer structure and to buffer the stress of the insulating layer 3 when it is bent. An inner shielding layer 5 is provided on the outside of the insulating isolation layer 4. The inner shielding layer 5 covers the outside of the insulating isolation layer 4 by overlapping and wrapping semi-conductive strips, which balances the electric field distribution on the surface of the insulating layer 3 and reduces interference during high-frequency signal transmission. A sub-shielding layer 6 is provided on the outside of the inner shielding layer 5. The sub-shielding layer 6 is designed for the signal core wire. On part of the outer side of the inner shielding layer 5, a copper strip is longitudinally wrapped with a guide wire. The joint is welded by argon arc welding. It is specifically used to block external electromagnetic interference and avoid crosstalk between signal core wires. A sub-shielding anti-corrosion layer 7 is provided on the outside of the sub-shielding layer 6. The sub-shielding anti-corrosion layer 7 is coated on the outside of the sub-shielding layer 6. It is a polyimide coating that protects the copper strip of the sub-shielding layer 6 from seawater corrosion and extends the decay period of its shielding effectiveness. The aforementioned inner structure constitutes the core. When multiple cores with the aforementioned inner structure are twisted together, the gaps formed are filled with a core filling layer 8. The core filling layer 8 is filled with water-blocking yarn, which keeps the core structure round. At the same time, the water-blocking yarn expands when it comes into contact with water, which plays a preliminary role in blocking water. A water-blocking adhesive layer 9 is provided inside the core filling layer 8. The water-blocking adhesive layer 9 fills the gaps in the core filling layer 8 and works in conjunction with the water-blocking yarn to further enhance the longitudinal water-blocking effect of the core. It can effectively prevent water penetration, especially when the cable is squeezed or bent. The above structure constitutes the cable core. A cable core wrapping layer 10 is provided on the outside of the cable core. The cable core wrapping layer 10 is wrapped around the outside of the filled cable core by overlapping aluminum-plastic composite tape, which fixes multiple cores into a whole and prevents the cable core from loosening. At the same time, the aluminum layer enhances the moisture resistance and shielding performance. An inner sheath 11 is provided on the outside of the cable core wrapping layer 10. The inner sheath 11 is extruded on the outside of the cable core wrapping layer 10 to form a continuous chlorinated polyethylene sheath, which provides inner mechanical protection for the cable core, resists friction between the cores, and further prevents moisture intrusion. An armor base layer 12 is provided on the outside of the inner sheath 11. The armor base layer 12 is wrapped around the outside of the inner sheath 11 and is a glass fiber tape impregnated with epoxy resin. It enhances the adhesion between the inner sheath 11 and the outer armor structure, and improves the overall tear resistance. An armor layer 13 is provided on the outside of the armor base layer 12. The armor layer 13 is formed by wrapping double galvanized steel strips with gaps on the outside of the armor base layer 12. The surface of the steel strips is coated with epoxy powder, which significantly improves the mechanical strength of the cable and resists external impact. A water-blocking buffer layer 14 is provided on the outside of the armor layer 13. The water-blocking buffer layer 14 covers the outside of the armor layer 13 by overlapping and wrapping water-blocking expansion strips. When it comes into contact with water, it expands rapidly to block the lateral penetration of water and buffer the wear of the armor layer 13 on the outer structure. The water-blocking buffer layer 14 is provided with an outer sheath reinforcement layer 15 and an outer sheath 16. The outer sheath reinforcement layer 15 is composited on the inner side of the outer sheath 16 and is a layer of aramid fiber braided layer. It provides reinforcement support for the outer sheath 16, improves its tensile strength, and prevents the sheath from breaking due to dragging during cable laying. The outer sheath 16 is extruded on the outside of the outer sheath reinforcement layer 15 and serves as the main outer protective structure of the cable. It is in direct contact with the external environment and uses high-density polyethylene material to resist the corrosion of seawater, marine atmosphere, etc. The outer sheath 16 is provided with an anti-corrosion coating 17, which is a polyvinyl fluoride coating sprayed on the surface of the outer sheath 16. This coating further enhances the corrosion resistance of the outer sheath 16, especially its resistance to chloride and sulfate ions in seawater. An identification strip 18 is provided on the outside of the outer sheath 16. The identification strip 18 is embedded on the outside of the outer sheath 16, located between the outer sheath 16 and the anti-corrosion coating 17. The identification strip 18 is printed with information such as the cable model, specifications, and manufacturer, which facilitates cable identification and maintenance.

[0022] Working principle: This corrosion-resistant multi-core cable for marine engineering achieves stable power and signal transmission and resists the erosion of the marine environment through the synergistic effect of its multi-layer structure; Conductor 1 serves as the core, with a multi-strand annealed soft copper wire stranded design to ensure smooth transmission of current and signals; the nickel coating of conductor anti-corrosion layer 2 tightly covers conductor 1, forming the first anti-corrosion barrier to prevent conductor 1 from being corroded by seawater. The insulation layer 3 is made of weather-resistant cross-linked polyethylene material, which isolates the electrical connection between different conductors 1 and avoids short circuits; the EPDM rubber material of the insulation isolation layer 4 enhances the bonding force between the insulation layer 3 and the outer structure, buffers the stress during bending, and protects the insulation layer 3 from damage. The inner shielding layer 5 is wrapped with overlapping semi-conductive strips to equalize the electric field on the surface of the insulating layer 3 and reduce high-frequency signal transmission interference; the sub-shielding layer 6 is designed for the signal core wire, and uses a copper strip longitudinal wrapping and a guide wire structure to block external electromagnetic interference and avoid signal crosstalk; the polyimide coating of the sub-shielding anti-corrosion layer 7 protects the copper strip of the sub-shielding layer 6 from corrosion. After multiple cores are twisted together, the water-blocking yarn in the core filling layer 8 fills the gaps and expands when it comes into contact with water to achieve initial water blocking; the water-blocking adhesive layer 9 fills the gaps in the water-blocking yarn to further enhance the longitudinal water blocking effect and prevent water from penetrating along the core. The aluminum-plastic composite tape of the cable core wrapping layer 10 fixes multiple cores into a whole to prevent loosening, while the aluminum layer enhances moisture resistance and shielding performance; the chlorinated polyethylene sheath of the inner sheath 11 provides inner mechanical protection for the cable core, resists core friction and prevents moisture intrusion. The fiberglass tape of the armor base layer 12 is impregnated with epoxy resin to enhance the adhesion between the inner sheath 11 and the armor layer 13 and improve tear resistance; the double galvanized steel tape of the armor layer 13 is wrapped with epoxy powder at gaps, which significantly improves the mechanical strength of the cable and resists external impact. The water-blocking expansion strip of the water-blocking buffer layer 14 expands when it comes into contact with water, blocking the lateral penetration of water, while buffering the wear of the outer structure of the armor layer 13; the aramid fiber braided layer of the outer sheath reinforcement layer 15 provides support for the outer sheath 16, improves its tensile strength, and prevents the sheath from breaking during laying. The high-density polyethylene material of the outer sheath 16 is in direct contact with the outside world, resisting corrosion from seawater, marine atmosphere, etc.; the polyvinyl fluoride coating of the anti-corrosion coating 17 further enhances the corrosion resistance of the outer sheath 16, especially the resistance to chloride ions and sulfate ions; the marking strip 18 facilitates the identification and maintenance of the cable. The cable has a multi-layered anti-corrosion structure from the inside out. The epoxy powder coating of the conductor anti-corrosion layer 2, the shielding anti-corrosion layer 7, the armor layer 13, the outer sheath 16, and the anti-corrosion coating 17 work together to effectively resist corrosion from marine environments such as seawater and salt spray, and extend the service life of the cable. The water-blocking yarn in the cable core filling layer 8 expands when it comes into contact with water, the water-blocking adhesive layer 9 fills the gaps, and the water-blocking buffer layer 14 blocks lateral penetration. The multiple water-blocking structures effectively prevent water from entering the inside of the cable, protect the conductor 1 and the insulation layer 3, and ensure stable transmission. The inner shielding layer 5 and the sub-shielding layer 6 reduce electromagnetic interference and signal crosstalk, ensuring the stability of power and signal transmission, and are especially suitable for high-frequency signal transmission scenarios. The insulation layer 4 buffers bending stress, the armor layer 13 enhances mechanical strength, and the outer sheath reinforcement layer 15 enhances tensile strength, enabling the cable to withstand external forces such as vibration, impact and drag in the marine environment. The various layers are tightly integrated, with the cable core wrapping layer 10 fixing the core and the armor base layer 12 enhancing adhesion, ensuring that the cable is not easily loosened or damaged during long-term use and adapts to complex marine engineering environments.

[0023] Structural Description: Conductor 1: Located at the core of the cable, it is made of multiple strands of annealed soft copper wire. This design serves as the basic carrier for the power and signal transmission of the entire cable. The multi-strand twisting design enhances the flexibility of Conductor 1, making it more adaptable to bending and vibration in marine environments. Conductor anti-corrosion layer 2: Directly coated on the surface of conductor 1, located between conductor 1 and the subsequent tin plating layer, and formed by electroplating to form a nickel coating. Its function is to add the first anti-corrosion barrier to conductor 1, utilizing the corrosion resistance of nickel to prevent seawater and other substances from corroding conductor 1. Insulation layer 3: Extruded onto the outside of conductor corrosion protection layer 2, tightly bonded to conductor corrosion protection layer 2, and made of weather-resistant cross-linked polyethylene material. The purpose of this structure is to isolate the electrical connection between different conductors 1, preventing short circuits. The weather-resistant material can adapt to the complex climate of the marine environment. Insulation layer 4: A thin layer formed on the outside of insulation layer 3, made of EPDM rubber. Its function is to enhance the bonding force between insulation layer 3 and the outer structure, while buffering stress when the cable is bent, protecting insulation layer 3 from damage, and maintaining stable insulation performance. Inner shielding layer 5: Covers the outside of the insulating layer 4 with overlapping semiconducting strips. This arrangement can balance the electric field distribution on the surface of the insulating layer 3, reduce interference during high-frequency signal transmission, and ensure the quality of signal transmission. Shielding layer 6: For the signal core wires, a copper strip longitudinally wrapped structure with a guide wire is used on the outer side of part of the inner shielding layer 5, and the joints are welded by argon arc welding. Its function is to specifically block external electromagnetic interference, avoid crosstalk between signal core wires, and ensure the accuracy of signal transmission. Sub-shielding and anti-corrosion layer 7: Coated on the outside of sub-shielding layer 6, it is a polyimide coating. This structure is designed to protect the copper strip of sub-shielding layer 6 from seawater corrosion, extend the decay period of its shielding effectiveness, and ensure the durability of the shielding effect. Cable core filling layer 8: After multiple cores with the above-mentioned inner layer structure are twisted together, water-blocking yarn is filled into the gaps formed. Its function is to keep the cable core structure round, and at the same time, the water-blocking yarn expands when it comes into contact with water, which can play a preliminary role in blocking water and preventing water from entering the interior of the cable core. Water-blocking adhesive layer 9: Fills the gaps in the cable core filling layer 8. This structure works in conjunction with the water-blocking yarn to further enhance the longitudinal water-blocking effect of the cable core, especially when the cable is compressed or bent, effectively preventing water penetration and improving the overall water-blocking performance. Cable core wrapping layer 10: This layer is wrapped around the outside of the filled cable core using an overlapping aluminum-plastic composite tape. Its function is to fix multiple cores into a whole, prevent the cable core from loosening, and at the same time, use the aluminum layer to enhance moisture resistance and shielding performance, providing additional protection for the cable core. Inner sheath 11: Extruded onto the outside of the cable core wrapping layer 10, forming a continuous chlorinated polyethylene sheath. This structure provides inner mechanical protection for the cable core, resisting friction between the cores, and further preventing moisture intrusion, thus protecting the internal structure. Armor base layer 12: Wrapped around the outside of the inner sheath 11, it is a fiberglass tape impregnated with epoxy resin. Its function is to enhance the adhesion between the inner sheath 11 and the outer armor structure, while improving the overall tear resistance of the cable and making the structure more stable. Armor layer 13: Formed by wrapping double galvanized steel strips with gaps around the outside of the armor base layer 12, with the surface of the steel strips coated with epoxy powder. This configuration significantly improves the mechanical strength of the cable, effectively resists external impacts, and protects the internal structure from mechanical damage. Water-blocking buffer layer 14: Covers the outside of the armor layer 13 by overlapping and wrapping water-blocking expansion strips. Its function is to expand rapidly when exposed to water, blocking the lateral penetration of water, while buffering the wear of the armor layer 13 on the outer structure and extending the service life of the outer structure. Outer sheath reinforcement layer 15: Composite on the inner side of the outer sheath 16, it is a layer of aramid fiber braid. This structure is designed to provide reinforcement and support for the outer sheath 16, improve its tensile strength, and prevent the sheath from breaking due to dragging during cable laying. Outer sheath 16: Extruded onto the outside of the outer sheath reinforcement layer 15, made of high-density polyethylene. As the main outer protective structure of the cable, it is in direct contact with the external environment and can resist the erosion of seawater, marine atmosphere, etc., protecting the internal structure. Anti-corrosion coating 17: Sprayed onto the surface of the outer sheath 16, it is a layer of polyvinyl fluoride coating. Its function is to further enhance the corrosion resistance of the outer sheath 16, especially its resistance to chloride ions and sulfate ions in seawater, thereby improving the overall anti-corrosion performance of the cable. Identification strip 18: Embedded on the outside of the outer sheath 16, located between the outer sheath 16 and the anti-corrosion coating 17, it is printed with information such as the cable model, specifications, and manufacturer. This structure is designed to facilitate cable identification and maintenance, and to simplify cable management in marine engineering projects. The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A corrosion-resistant multi-core cable for marine engineering, comprising a conductor (1), characterized in that: A conductor anti-corrosion layer (2) is provided on the outside of the conductor (1), and the conductor anti-corrosion layer (2) is directly covered on the surface of the conductor (1); An insulating layer (3) is provided on the outside of the conductor anti-corrosion layer (2), and an insulating isolation layer (4) is provided on the outside of the insulating layer (3). An inner shielding layer (5) is provided on the outside of the insulating isolation layer (4), and a sub-shielding layer (6) is provided on the outside of the inner shielding layer (5). A sub-shielding anti-corrosion layer (7) is provided on the outside of the sub-shielding layer (6), and the sub-shielding anti-corrosion layer (7) is coated on the outside of the sub-shielding layer (6).

2. The corrosion-resistant multi-core cable for marine engineering according to claim 1, characterized in that: The insulating layer (3) is extruded onto the outside of the conductor anti-corrosion layer (2).

3. The corrosion-resistant multi-core cable for marine engineering according to claim 2, characterized in that: The inner shielding layer (5) is covered on the outside of the insulating isolation layer (4) by overlapping and wrapping semiconducting strips.

4. The corrosion-resistant multi-core cable for marine engineering according to claim 3, characterized in that: After the cores containing the shielding and anti-corrosion layer (7) are twisted together, the gaps are filled with a cable core filling layer (8), and a water-blocking adhesive layer (9) is provided inside the cable core filling layer (8).

5. A corrosion-resistant multi-core cable for marine engineering according to claim 4, characterized in that: The cable core filling layer (8) is located on the outside of the cable core, and a cable core wrapping layer (10) is provided on the outside of the cable core wrapping layer (10), and an inner sheath (11) is provided on the outside of the cable core wrapping layer (10).

6. A corrosion-resistant multi-core cable for marine engineering according to claim 5, characterized in that: The inner sheath (11) is provided with an armor base layer (12) on the outside, the armor base layer (12) is provided with an armor layer (13) on the outside, and the armor layer (13) is provided with a water-resistant buffer layer (14) on the outside.

7. A corrosion-resistant multi-core cable for marine engineering according to claim 6, characterized in that: The water-blocking buffer layer (14) is provided with an outer sheath reinforcement layer (15) and an outer sheath (16) on the outside. The outer sheath (16) is provided with an anti-corrosion coating (17) and an identification strip (18) is provided on the outside of the outer sheath (16).

8. A corrosion-resistant multi-core cable for marine engineering according to claim 7, characterized in that: The outer sheath reinforcement layer (15) is composited on the inner side of the outer sheath (16).

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