Compression-resistant submarine cable and manufacturing method thereof

Abstract

The invention relates to the technical field of special cables, and discloses a compression-resistant submarine cable and a manufacturing method thereof, and the compression-resistant submarine cable comprises a conductor wire core, a compression-resistant layer, a metal sheath and a wear-resistant sheath. The conductor wire cores are used for power transmission. The compression-resistant layer comprises a wrapping tape, a waterproof filler and a plurality of positioning wires, the wrapping tape winds the plurality of positioning wires on the outer layer of the conductor wire core, the length direction of the positioning wires is parallel to the length direction of the conductor wire core, and the waterproof filler fills gaps between the wrapping tape and the plurality of positioning wires; the metal sheath is arranged outside the compression-resistant layer, and the metal sheath and the compression-resistant layer are arranged to form a waterproof structure; the wear-resistant sheath is arranged outside the anti-bite layer and is used for being in contact with silt; therefore, the cable can effectively bear the water pressure of the seabed while ensuring the waterproofness, thereby solving the problem of pressure resistance of the submarine cable in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of special cables, and particularly to a compression-resistant submarine cable and a manufacturing method thereof. Background Art

[0002] Power cables are mainly used for transmitting electric energy. Their advantages are small floor area and high power supply reliability, playing an important role in the infrastructure construction of our country. With the development of offshore wind power, sometimes during the power transmission process, it is necessary to cross the seabed or underwater of rivers, and in this case, submarine cables are required.

[0003] Existing submarine cables sometimes adopt covering protection methods such as stone throwing protection or concrete protection. In this way, the submarine cable has to bear the high pressure of the seabed and the pressure caused by the soil and stone covering above it. Therefore, we propose a compression-resistant submarine cable and a manufacturing method thereof. Summary of the Invention

[0004] The purpose of the present invention is to provide a compression-resistant submarine cable and a manufacturing method thereof, which solve the problem of the compression resistance of submarine cables in the prior art.

[0005] To achieve the above object, the technical solution of the present invention is as follows: A compression-resistant submarine cable includes: a conductor core, an insulating layer, a compression layer, a metal sheath, and a wear-resistant sheath, which are arranged in sequence from the inside out;

[0006] The conductor core is used for power transmission;

[0007] The compression layer includes a wrapping tape, a waterproof filler, and multiple positioning wires. The positioning wires extend along the length direction of the compression-resistant submarine cable. The multiple positioning wires are circumferentially spaced outside the insulating layer. The wrapping tape is wound around each positioning wire in sequence. The waterproof filler is filled in the gap between the insulating layer and the metal sheath.

[0008] Due to the arrangement of the multiple positioning wires, the solid shape formed by the waterproof filler is cylindrical. It and the wrapping tape jointly provide longitudinal waterproofing for the cable. The waterproof filler, the wrapping tape, and the multiple positioning wires form the compression layer.

[0009] The metal sheath is arranged outside the compression layer. The metal sheath and the compression layer are arranged in a waterproof structure. At this time, the metal sheath serves as the radial waterproof layer of the cable, and the compression layer serves as the longitudinal waterproof layer of the cable, providing all-round waterproofing for the conductor core inside the cable. While preventing water molecules from infiltrating into the cable to form the water tree phenomenon, it reduces the number of internal layers of the cable, thereby reducing the weight of the cable and making transportation and laying more convenient.

[0010] The wear-resistant sheath is the outermost layer of the cable. The wear-resistant sheath is in contact with the external sediment. The wear-resistant sheath reduces the abrasion of the cable caused by the flowing action of the sediment and extends the service life of the cable.

[0011] As an alternative, the waterproof filler is a flexible filler or a semi-rigid filler, and the waterproof filler completely wraps the outer periphery of the positioning wire and the wrapping tape.

[0012] The flexible and semi-rigid waterproof fillers can play a buffering role in the force transmission between the metal sheath and the insulating layer, so that the filling of the waterproof filler can avoid the direct contact between the metal sheath and multiple positioning wires, thereby reducing the rigid damage caused by the collision between structures during transportation.

[0013] As an alternative, the material of the metal sheath is lead alloy.

[0014] Due to the physical properties of the lead alloy, the metal sheath can withstand the external forces generated under complex seabed conditions (such as ocean current impact, seabed movement, etc.), ensuring that the compressive layer and the overall structure are not easily physically damaged during transportation and use. And the metal sheath also has a certain anti-biting property, thereby protecting the cable from being easily damaged by the biting of fish and extending the service life of the cable.

[0015] As an alternative, the positioning wire is a steel wire.

[0016] As an alternative, the wrapping tape is a semiconductor double-sided water-blocking tape, and the overlapping rate of the wrapping of the wrapping tape is not less than 15%.

[0017] When the wrapping tape is wound, the gaps between adjacent two layers of the wrapping tape are covered with each other, thereby forming a continuous and gapless water barrier layer, greatly reducing the possibility of water directly seeping in from the interlayer gaps, effectively reducing the risk of the occurrence of water tree phenomenon in the insulating layer, and further enhancing the withstand voltage ability of the insulating layer to ensure that the internal structure will not be affected by moisture intrusion and get damp or damaged.

[0018] As an alternative, the gaps between multiple positioning wires are equal.

[0019] As an alternative, it further includes an anti-biting layer for preventing fish from biting and damaging the cable;

[0020] The anti-biting layer is arranged between the metal sheath and the wear-resistant sheath.

[0021] The outer surface of the anti-biting layer fits with the inner contour of the wear-resistant sheath, and the inner contour of the anti-biting layer fits with the outer surface of the metal sheath. The anti-biting layer prevents fish from further damaging the cable structure after the wear-resistant sheath is bitten by fish.

[0022] As an alternative, the anti-biting layer is made of a mixture of coated nylon and wire.

[0023] The wire with high tensile strength and rigidity and the coated nylon that can increase the structural toughness are used as the materials of the anti-biting layer, enabling the anti-biting layer to prevent fish from biting by virtue of its own structural strength, thereby extending the service life of the cable.

[0024] As an alternative, the insulating layer sequentially includes a conductor shielding layer, a material layer, and an insulating shielding layer from the inside to the outside.

[0025] The insulating layer can prevent the electron overflow of the conductor core during power transmission. The insulating layer uses a water-blocking semi-conductive composite material made by adding sodium polyacrylate to the semi-conductive composite material to enhance the water-blocking performance of the semi-conductive layer of the cable. Therefore, in addition to playing an insulating role, the insulating layer can also greatly reduce the moisture entering the insulating layer, thereby maximizing the avoidance of failures caused by the aggregation of water molecules in the insulating layer.

[0026] A manufacturing method of a compressive submarine cable, the manufacturing method includes:

[0027] Step 1: Wind a plurality of the positioning wires on the outer layer of the conductor core through the wrapping tape.

[0028] Step 2: Fill the waterproof filler into the gap between the wrapping tape and the plurality of positioning wires until the waterproof filler solidifies.

[0029] Step 3: Completely cover the compressive layer with the metal sheath.

[0030] Step 4: Sheath the wear-resistant sheath on the outer surface of the metal sheath to obtain a compressive submarine cable.

[0031] A compressive submarine cable and its manufacturing method according to the present invention, compared with the prior art, the beneficial effects are as follows: 1. The compressive layer is composed of a wrapping tape, a waterproof filler, and a plurality of positioning wires extending along the length direction of the cable, and the positioning wires are circumferentially arranged at intervals on the outer periphery of the insulating layer. The wrapping tape winds around each positioning wire in turn. The plurality of positioning wires provide an accurate positioning and uniform stress basis for the wrapping tape, enabling the wrapping tape to be evenly fixed at a predetermined position to form a stable fastening layer, and further effectively dispersing and absorbing pressure under the action of external high water pressure to ensure that the overall structure of the cable is not easily deformed or damaged; 2. The waterproof filler is filled in the gap between the insulating layer and the metal sheath. The waterproof filler forms a continuous water barrier layer to prevent seawater from seeping into the interior, protecting the conductor and the insulating layer from water intrusion, reducing the risk of short circuit or insulation breakdown caused by moisture, and the structure is complex after the wrapping tape winds around the positioning wire, which can increase the adhesion area between the waterproof filler and the positioning wire and the wrapping tape, thereby increasing the stability of the compressive layer. Description of the Drawings

[0032] Figure 1 is an overall schematic diagram of the pressure-resistant submarine cable according to an embodiment of the present invention;

[0033] Figure 2 is the pressure-resistant submarine cable according to an embodiment of the present invention at Figure 1 a partial enlarged view at A;

[0034] Figure 3 is a side view of the pressure-resistant submarine cable according to an embodiment of the present invention;

[0035] In the figure, 1, conductor core; 2, insulating layer; 3, pressure-resistant layer; 301, positioning wire; 302, wrapping tape; 303, waterproof filler; 4, metal sheath; 5, wear-resistant sheath. Specific embodiments

[0036] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0037] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0038] In the description of the present invention, it should be understood that the terms "connected", "connected", "fixed", etc. used in the present invention should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or a welded connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] As Figures 1 to 3 shown, a preferred embodiment of the present invention provides a pressure-resistant submarine cable, including: a conductor core 1, an insulating layer 2, a pressure-resistant layer 3, a metal sheath 4, and a wear-resistant sheath 5 arranged in sequence from the inside out;

[0040] The conductor core 1 is used for power transmission;

[0041] The pressure-resistant layer 3 includes a wrapping tape 302, a waterproof filler 303, and multiple positioning wires 301. The positioning wires 301 extend along the length direction of the pressure-resistant submarine cable. The multiple positioning wires 301 are circumferentially spaced on the outer periphery of the insulating layer 2. The wrapping tape 302 is wound around each positioning wire 301 in sequence. The waterproof filler 303 is filled in the gap between the insulating layer 2 and the metal sheath 4.

[0042] Due to the arrangement of the multiple positioning wires 301, the solid shape formed by the waterproof filler 303 is cylindrical. It and the wrapping tape 302 jointly provide longitudinal waterproofing for the cable. The waterproof filler 303, the wrapping tape 302, and the multiple positioning wires 301 form the pressure-resistant layer 3.

[0043] The metal sheath 4 is arranged outside the pressure-resistant layer 3. The metal sheath 4 and the pressure-resistant layer 3 are arranged in a waterproof structure. At this time, the metal sheath 4 serves as the radial waterproof layer of the cable, and the pressure-resistant layer 3 serves as the longitudinal waterproof layer of the cable, providing all-round waterproofing for the conductor core 1 inside the cable. While preventing water molecules from infiltrating into the cable to form the phenomenon of water trees, it reduces the internal layers of the cable, thereby reducing the weight of the cable and making transportation and laying more convenient.

[0044] The wear-resistant sheath 5 is the outermost layer of the cable. The wear-resistant sheath 5 is in contact with the external sediment. The wear-resistant sheath 5 reduces the abrasion of the cable caused by the flowing action of the sediment and extends the service life of the cable.

[0045] Based on the above technical solution, the pressure-resistant layer 3 is composed of a wrapping tape 302, a waterproof filler 303, and multiple positioning wires 301 extending along the length direction of the cable. The positioning wires 301 are circumferentially spaced on the outer periphery of the insulating layer 2. The wrapping tape 302 is wound around each positioning wire 301 in sequence. The multiple positioning wires 301 provide an accurate positioning and uniform stress basis for the wrapping tape 302, enabling the wrapping tape 302 to be evenly fixed in a predetermined position to form a stable fastening layer, making the pressure-resistant layer 3 have the ability of elastic deformation, and then effectively dispersing and absorbing pressure under the action of external high water pressure to ensure that the overall structure of the cable is not easily deformed or damaged. The waterproof filler 303 is filled in the gap between the insulating layer 2 and the metal sheath 4. The waterproof filler 303 forms a continuous water barrier layer to prevent seawater from infiltrating into the interior, protecting the conductor and the insulating layer 2 from water intrusion, reducing the risk of short circuit or insulation breakdown caused by moisture. Moreover, after the wrapping tape 302 is wound around the positioning wire 301, the structure is complex, which can increase the adhesion area between the waterproof filler 303, the positioning wire 301, and the wrapping tape 302, thereby increasing the stability of the pressure-resistant layer 3.

[0046] In a preferred embodiment, the positioning wire 301 is made of a titanium-nickel shape memory alloy wire and is circumferentially evenly distributed at a spiral angle of 25° - 35°.

[0047] Under its working conditions, the positioning wires 301 of the submarine cable with pressure resistance can be arranged to produce adaptive elastic deformation. Through dislocation slip, the submarine pressure and temperature strain can be absorbed, so as to avoid stress concentration and prevent unnecessary deformation of the pressure-resistant layer 3, which may affect the extension direction of the cable. More seriously, the pressure-resistant layer 3 may be torn.

[0048] Furthermore, as Figures 1 to 3 shown, the waterproof filler 303 is flexible or semi-rigid. The flexible and semi-rigid waterproof filler 303 can play a buffering role in the force transmission between the metal sheath 4 and the insulating layer 2, so that the filling of the waterproof filler 303 can avoid the direct contact between the metal sheath 4 and the multiple positioning wires 301, thus reducing the rigid damage caused by collision between structures during transportation.

[0049] Furthermore, as Figures 1 to 3 shown, the material of the metal sheath 4 is lead alloy, and the metal sheath 4 completely wraps the pressure-resistant layer 3. Due to the physical properties of the lead alloy, the metal sheath 4 can withstand the external forces generated under complex submarine working conditions (such as sea current impact, submarine movement, etc.), ensuring that the pressure-resistant layer 3 and the overall structure are not easily physically damaged during transportation and use. Moreover, the metal sheath 4 also has a certain anti-biting property, which further protects the cable from being easily damaged by the biting of fish and extends the service life of the cable.

[0050] Furthermore, as Figures 1 to 3 shown, the wrapping tape 302 is a semiconductor double-sided water-blocking tape, and the overlapping rate of the wrapping tape 302 is not less than 15%. When the wrapping tape 302 is wound, the gaps between adjacent layers of the wrapping tape 302 are covered with each other, thus forming a continuous and gapless water-blocking layer, greatly reducing the possibility of water flowing directly into the insulating layer 2 through the interlayer gaps, effectively reducing the risk of water treeing phenomenon in the insulating layer 2, and further improving the voltage withstand ability of the insulating layer 2 to ensure that the internal structure will not be affected by moisture intrusion and damaged.

[0051] Moreover, the semiconductor double-sided water-blocking tape can make the electric field distribution on the outer layer of the cable more uniform, reduce local electric field concentration, and reduce the risk of partial discharge or electric breakdown, thereby improving the insulation performance and the voltage withstand ability of the cable.

[0052] Furthermore, as Figures 1 to 3 shown, the gaps between the multiple positioning wires 301 are equal, and the pressure-resistant layer 3 is cylindrical. At this time, due to the structural characteristics brought by the shape, the pressure-resistant layer 3 can disperse the stress when it is subjected to a single-direction force, enabling the pressure-resistant layer 3 to provide better pressure resistance for the cable.

[0053] Furthermore, as Figures 1 to 3 shown, it also includes an anti-biting layer for preventing fish from biting and damaging the cable;

[0054] The anti-biting layer is sleeved between the metal sheath 4 and the wear-resistant sheath 5. The outer surface of the anti-biting layer fits the inner contour of the wear-resistant sheath 5, and the inner contour of the anti-biting layer fits the outer surface of the metal sheath 4. The anti-biting layer prevents fish from further damaging the cable structure after the wear-resistant sheath 5 is bitten by fish.

[0055] The outer surface of the anti-biting layer is arranged in a serrated structure, and the inner peripheral wall of the wear-resistant sheath 5 is fitted with the serrated structure on the outer surface of the anti-biting layer;

[0056] Interlocking reinforcement between the wear-resistant sheath 5 and the anti-biting layer:

[0057] The serrated structure and the inner wall of the wear-resistant sheath 5 form a three-dimensional occlusal structure, which improves the bonding strength between the anti-biting layer and the wear-resistant sheath 5, making it difficult for the wear-resistant sheath 5 to be peeled off from the anti-biting layer, and preventing relative slippage between layers when marine organisms bite, resulting in seawater being more likely to enter the interlayer gap.

[0058] Dynamic stress dispersion of the anti-biting layer:

[0059] When the fish teeth bite into the serrated structure of the anti-biting layer, the inclined surface on the serrated structure will guide the biting point to slip towards the tooth groove of the serration, and the biting force will be transmitted to the tooth groove of the serration, changing from single-point pressure bearing (if the anti-biting layer has no serrated structure) to multi-point pressure bearing or even surface pressure bearing, so that the biting pressure is dispersed, avoiding stress concentration and causing deformation of the metal sheath 4, which may affect the conductor core.

[0060] In a specific embodiment, the tooth groove between the serrations is a V-shaped groove, and the midline of the tooth groove is misaligned with the radial direction of the conductor core 1.

[0061] Damage path control of the anti-biting layer:

[0062] The tooth groove between the serrations guides the crack propagation direction of the anti-biting layer to deviate from the cable axis. If the anti-biting layer is torn, the cracking direction of the crack will not extend to the compressive layer 3, so that the local damage of the anti-biting layer will not directly cause water ingress at the compressive layer 3.

[0063] Biological protection barrier of the anti-biting layer:

[0064] The serrated structure is not a continuous occlusal surface. When fish bite the anti-biting layer, due to its serrated structure, it is easy to cause pain or even back injury to the biting fish, forcing the fish to let go, thus avoiding repeated biting of the anti-biting layer by fish.

[0065] Environmental adaptability of the anti-biting layer:

[0066] The gap between the sharp teeth is controlled within 0.5 - 1 mm, allowing sediment to fill into the tooth grooves to form a buffer layer, preventing fish from directly damaging the anti-biting layer by tearing, and being able to absorb the impact force of fish biting, and jointly acting with the seabed environment to adaptively protect the conductor core 1.

[0067] Further, as Figures 1 to 3 shown, since the anti-biting layer is applied to the seabed high-pressure conditions, in addition to having the function of preventing fish from biting, it also needs good compressive resistance. Therefore, metal wires that can provide high tensile strength and rigidity for the structure and glue-coated nylon that can increase the toughness of the structure are selected as the materials for the anti-biting layer, so that the anti-biting layer can prevent fish from biting by using its own structural strength, thereby extending the service life of the cable.

[0068] Further, as Figures 1 to 3 shown, an insulating layer 2 is also provided between the conductor core 1 and the compressive layer 3. The inner wall of the insulating layer 2 is attached to the conductor core 1, and the outer wall of the insulating layer 2 is attached to the inner wall of the compressive layer 3. The insulating layer 2 can prevent the electron overflow of the conductor core 1 during power transmission. The insulating layer 2 uses a water-blocking semi-conductive composite material made by adding sodium polyacrylate to a semi-conductive composite material to enhance the water-blocking performance of the cable semi-conductive layer. Therefore, in addition to being able to play an insulating role, the insulating layer 2 can also greatly reduce the moisture entering the insulating layer 2, thereby avoiding faults caused by the aggregation of water molecules in the insulating layer 2 to the greatest extent.

[0069] Further, the insulating layer 2 sequentially includes a conductor shielding layer, a material layer, and an insulating shielding layer from the inside to the outside.

[0070] The conductor shielding layer uses a nano-carbon black / ethylene-vinyl acetate composite material, the insulating shielding layer uses a cross-linked polyethylene / zinc oxide whisker composite material, and the material layer selects cross-linked polyethylene.

[0071] The conductor shielding layer eliminates the electric field distortion caused by burrs on the conductor surface and reduces the risk of partial discharge;

[0072] The insulating shielding layer balances the external electric field distribution and suppresses the accumulation of space charges;

[0073] The material layer uses cross-linked polyethylene as the main medium, provides a breakdown field strength of ≥95 kV / mm, and adds nano-fillers to improve the resistance to electrical treeing and water treeing performance.

[0074] The embodiment of the present invention also provides a manufacturing method of a compressive submarine cable. Using the compressive submarine cable, the manufacturing method includes:

[0075] Step 1: Wind a plurality of positioning wires 301 around the outer layer of the conductor core 1 through a wrapping tape 302;

[0076] Step 2: Fill the gap between the wrapping tape 302 and multiple positioning wires 301 with filler until the filler solidifies;

[0077] Step 3: Use the metal sheath 4 to completely cover the compression layer 3;

[0078] Step 4: Sheath the wear-resistant sheath 5 on the outer surface of the metal sheath 4 to obtain a compression-resistant submarine cable.

[0079] In summary, a conductor core 1, a pressure-resistant layer, a metal sheath 4, and a wear-resistant sheath 5 are sequentially arranged outside the conductor core 1 of the cable. The pressure-resistant layer is composed of multiple positioning wires 301, a wrapping tape 302, and a waterproof filler 303. Both the waterproof filler 303 and the wrapping tape 302 are strip-shaped, providing a longitudinal waterproof function for the cable while withstanding pressure. The metal sheath 4 provides a radial waterproof function for the cable. The wear-resistant sheath 5 is arranged on the outermost side of the cable to reduce the wear of the cable caused by the flow of sediment, enabling the cable to adapt to the seabed environment, thereby solving the problem of the compression resistance of submarine cables in the prior art.

[0080] It should be understood that in the present invention, terms such as "first" and "second" are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information. In addition, the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0081] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A pressure-resistant submarine cable, characterized in that: include: A conductor core (1), an insulating layer (2), a pressure-resistant layer (3), a metal sheath (4) and a wear-resistant sheath (5) are arranged in sequence from the inside to the outside; The conductor core (1) is used for power transmission; The pressure-resistant layer (3) comprises a wrapping tape (302), a waterproof filler (303) and a plurality of positioning wires (301), wherein the positioning wires (301) extend along the length direction of the pressure-resistant submarine cable, and the plurality of positioning wires (301) are circumferentially spaced and arranged on the outer periphery of the insulating layer (2). The wrapping tape (302) is sequentially wound around each positioning wire (301), and the waterproof filler (303) is filled in the gap between the insulating layer (2) and the metal sheath (4).

2. The pressure-resistant submarine cable according to claim 1, characterized in that: The waterproof filler (303) is a flexible filler or a semi-rigid filler, and the waterproof filler (303) completely wraps the outer circumference of the positioning wire (301) and the wrapping tape (302).

3. The pressure-resistant submarine cable according to claim 2, characterized in that: The material of the metal sheath (4) is lead alloy.

4. The pressure-resistant submarine cable according to claim 1, characterized in that: The positioning wire (301) is a steel wire.

5. The pressure-resistant submarine cable according to claim 1, characterized in that: The wrapping tape (302) is a semiconductor double-sided water-blocking tape, and the wrapping overlap rate of the wrapping tape (302) is not less than 15 percent.

6. The pressure-resistant submarine cable according to claim 1, characterized in that: The gaps between the plurality of positioning wires (301) are equal.

7. The pressure-resistant submarine cable according to claim 1, characterized in that: It also includes an anti-tear layer for preventing fish from biting and damaging the cable; The anti-bite layer is arranged between the metal sheath (4) and the wear-resistant sheath (5).

8. The pressure-resistant submarine cable according to claim 7, characterized in that: The anti-bite layer is made of a mixture of rubber-coated nylon and metal wire.

9. The pressure-resistant submarine cable according to claim 1, characterized in that: The insulating layer (2) comprises, from the inside to the outside, a conductor shielding layer, a material layer and an insulating shielding layer.

10. A manufacturing method for manufacturing a pressure-resistant submarine cable according to any one of claims 1 to 9, characterized in that: include: Step 1: wrapping a plurality of the positioning wires (301) around the outer layer of the conductor core (1) through the wrapping tape (302); Step 2: Filling the waterproof filler (303) into the gap between the wrapping tape (302) and the plurality of positioning wires (301) until the waterproof filler (303) solidifies; Step 3: using the metal sheath (4) to completely cover the pressure-resistant layer (3); Step 4: The wear-resistant sheath (5) is sleeved on the outer surface of the metal sheath (4) to obtain a pressure-resistant submarine cable.

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