Crosslinked polyethylene insulated ultrahigh-voltage submarine cable

Abstract

The invention discloses a crosslinked polyethylene insulated ultrahigh-voltage submarine cable, and relates to the technical field of submarine cables, the crosslinked polyethylene insulated ultrahigh-voltage submarine cable comprises a conductor, the outer side of the conductor is sleeved with a wrapping conductive tape, the outer side of the wrapping conductive tape is wound with a shielding tape, and the outer side of the shielding tape is provided with a supporting compression-resistant anti-deformation mechanism. The supporting anti-compression and anti-deformation mechanism comprises a cross-linked polyethylene insulating layer. The outer side of the shielding tape is sleeved with a cross-linked polyethylene insulating layer, and the outer side of the cross-linked polyethylene insulating layer is sleeved with a neck bush. The cable is scientific and reasonable in structure and safe and convenient to use, the supporting compression-resistant anti-deformation mechanism is arranged, the insulation effect of the cable is improved through cooperation of the neck bush and the cross-linked polyethylene insulation layer, the elasticity and toughness of the cable are improved through cooperation of the corrugated sleeve, the V-shaped supporting plate, the splicing ring and the elastic supporting pipe, bending and rebounding are facilitated, and the service life of the cable is prolonged. Meanwhile, the interior of the cable can be supported and reinforced, the compressive strength is improved, and deformation is not prone to occurring.

Description

Technical Field

[0001] This invention relates to the field of submarine cable technology, specifically to a cross-linked polyethylene insulated ultra-high voltage submarine cable. Background Technology

[0002] Submarine cables are cables wrapped in insulating material and laid on the seabed for telecommunications transmission. Submarine cables are divided into submarine communication cables and submarine power cables. Submarine communication cables are mainly used in long-distance communication networks, typically between distant islands, and in important applications such as cross-sea military facilities. For example, a submarine cable patent with application number CN202420860655.5, by setting up a conductor connected to the ground wire, uses the conductor as a short-circuit path when the core wire fails, thereby improving the safety of circuit operation.

[0003] However, the submarine cable of this patent has poor compressive strength during use. When subjected to high pressure, it is prone to compression deformation, which affects the transmission effect of the cable. It is also easily bitten by fish, causing internal damage to the cable and reducing its service life. Therefore, in order to avoid the above-mentioned technical problems, it is indeed necessary to provide a cross-linked polyethylene insulated ultra-high voltage submarine cable to overcome the defects of the prior art. Summary of the Invention

[0004] This invention provides a cross-linked polyethylene insulated ultra-high voltage submarine cable, which can effectively solve the problems mentioned in the background art, such as poor compressive strength, easy extrusion deformation under high pressure, affecting the transmission effect of the cable, and easy for fish to bite, causing internal damage to the cable and reducing its service life.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A cross-linked polyethylene insulated ultra-high voltage submarine cable includes a conductor, a conductive wrapping tape sleeved on the outside of the conductor, a shielding tape wound around the outside of the conductive wrapping tape, a support and pressure-resistant deformation-resistant mechanism provided on the outside of the shielding tape, the support and pressure-resistant deformation-resistant mechanism including a cross-linked polyethylene insulation layer, the cross-linked polyethylene insulation layer sleeved on the outside of the shielding tape, an inner liner sleeved on the outside of the cross-linked polyethylene insulation layer, a plurality of splicing slots arranged circumferentially on the outside of the inner liner, the splicing slots filled with limiting protrusions, V-shaped support plates equidistantly arranged on the outside of the limiting protrusions, a corrugated sleeve sleeved on the outside of the inner liner, a plurality of splicing rings axially spaced on the inner wall of the corrugated sleeve, a plurality of elastic support tubes arranged circumferentially between the inside of the splicing rings and the outside of the inner liner, a steel-plastic composite pipe sleeved on the outside of the corrugated sleeve, an inner reinforcing mesh sleeved on the outside of the steel-plastic composite pipe, and a heat-conducting ring sleeved on the outside of the inner reinforcing mesh.

[0006] Furthermore, the inner liner is made of epoxy resin, the limiting protrusion is made of elastic rubber, and one side of the V-shaped support plate is fixedly connected to the inner wall of the splicing ring.

[0007] Furthermore, the inner wall of the V-shaped support plate on the outside of the elastic support tube inside the splicing ring is in contact with the inner wall, and the outer side of the elastic support tube on the outside of the inner liner is in contact with the outer side of the V-shaped support plate.

[0008] Furthermore, a waterproof sleeve is filled between the inner reinforcing mesh and the heat-conducting ring, and a support ring is sleeved between two adjacent heat-conducting rings on the outside of the waterproof sleeve. An outer reinforcing mesh is sleeved on the outside of both the support ring and the heat-conducting ring, and a steel wire armor layer is sleeved on the outside of the outer reinforcing mesh.

[0009] Furthermore, both the inner and outer reinforcing meshes are welded from aluminum alloy, the thickness of the support ring is equal to the thickness of the heat-conducting ring, and the interior of the waterproof sleeve is filled with water-blocking and heat-conducting grease.

[0010] Furthermore, a protective anti-bite mechanism is provided on the outer side of the steel wire armor layer. This mechanism includes an outer anti-corrosion sleeve fitted over the outer side of the steel wire armor layer. Several embedding grooves are arranged around the outer side of the outer anti-corrosion sleeve, and hollow rubber tubes are filled inside these grooves. Several partition plates are axially spaced and snapped into the interior of each hollow rubber tube. Absorbent cotton swabs are filled between adjacent partition plates inside each hollow rubber tube. Supporting rubber pads are filled between adjacent hollow rubber tubes on the outer side of the outer anti-corrosion sleeve. A high-strength anti-ejection sleeve is fitted onto the outer side of the outer anti-corrosion sleeve. The high-strength anti-ejection sleeve covers the outer side of the hollow rubber tube and the supporting rubber pad. Several covering strips are circumferentially clamped onto the outer side of the high-strength anti-ejection sleeve. Several overflow grooves are spaced apart axially inside the covering strips. A drain port is provided on the outer side of the high-strength anti-ejection sleeve at the bottom position corresponding to the overflow groove. A liquid outlet pipe is clamped inside the outer side of the hollow rubber tube corresponding to the liquid outlet. A support rod is clamped at the bottom end of the covering strip. A sealing ball is clamped at one end of the support rod at the position inside the liquid outlet pipe.

[0011] Furthermore, both the outer anti-corrosion sleeve and the hollow rubber tube are made of polyvinyl chloride, the absorbent cotton swab absorbs fish repellent liquid, and the outer side of the absorbent cotton swab is in contact with the inner wall of the hollow rubber tube.

[0012] Furthermore, the supporting rubber pad is made of highly elastic rubber, and the inner wall of the high-strength anti-bite sleeve is provided with several slots, with the outer side of the hollow rubber tube embedded in the slots.

[0013] Furthermore, the high-strength anti-bite sleeve is made of a mixture of polyurethane and aramid fibers, and the cover strip is made of elastic rubber.

[0014] Furthermore, the installation position of the liquid outlet pipe corresponds to the opening position of the overflow groove, the outer side of the sealing ball is in contact with the inner wall of the liquid outlet pipe, and the diameter of the sealing ball is larger than the diameter of the inner wall of the liquid outlet pipe. The inside of the liquid outlet pipe is connected to the inside of the hollow rubber tube.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the present invention has a scientific and reasonable structure and is safe and convenient to use. 1. A support and anti-deformation mechanism is set up. The inner bushing and cross-linked polyethylene insulation layer are used to increase the insulation effect of the cable. The corrugated bushing, V-shaped support plate, splicing ring and elastic support tube are used to improve the elasticity and toughness of the cable, making it easy to bend and rebound. At the same time, it can support and reinforce the inside of the cable, improve the compressive strength, and is not easy to deform when squeezed, thus ensuring the internal power transmission. By combining steel-plastic composite pipe, inner reinforcing mesh, support ring, outer reinforcing mesh and steel wire armor layer, the compressive strength of the cable is further enhanced, while it has stronger toughness and is not easy to break. At the same time, by using waterproof sleeve and heat-conducting ring, the waterproofness is increased and the heat inside the cable can be dissipated to the outside, preventing the internal temperature of the cable from becoming too high.

[0016] 2. A protective anti-bite mechanism is installed. The outer anti-corrosion sleeve increases the cable's corrosion resistance. The combination of the high-strength anti-bite sleeve and the covering strip increases the cable's tear resistance, preventing fish from damaging the cable. In addition, the high-strength anti-bite sleeve is supported by the embedded groove, hollow rubber tube, absorbent cotton swab, overflow groove, drain port, outlet pipe, and supporting rubber pad to prevent collapse. At the same time, when the cable is bitten by fish, the hollow rubber tube and absorbent cotton swab are squeezed to facilitate the discharge of liquid that drives away fish, thereby reducing fish biting of the cable and increasing its service life. The combination of partitions, support rods, and sealing balls allows for the separate storage of absorbent cotton swabs. This ensures that when fish are bitten, the liquid is only released at the location of the bite. Furthermore, the outlet tube can be sealed promptly after the fish leave to prevent excessive discharge at once, thus extending the lifespan of the fish repellent liquid and facilitating subsequent fish removal.

[0017] In summary, by combining the support and anti-deformation mechanism with the protective and anti-biting mechanism, the compressive strength of the submarine cable is improved. When subjected to fish bites and compression, it is less likely to deform, preventing damage to the cable's internal structure and ensuring data transmission. Furthermore, when fish bite, the hydraulic pressure at the biting site can be promptly released, thereby driving away the fish, reducing fish bites on the cable, minimizing damage, and increasing service life. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0019] In the attached diagram: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the support, pressure resistance, and deformation prevention mechanism of the present invention; Figure 3 This is a schematic diagram of the installation structure of the V-shaped support plate of the present invention; Figure 4 This is a schematic diagram of the installation structure of the support ring of the present invention; Figure 5 This is a schematic diagram of the structure of the protective and anti-bite mechanism of the present invention; Figure 6 This is a schematic diagram of the installation structure of the partition plate of the present invention; Figure 7 This is the present invention. Figure 6 Schematic diagram of the structure of region A in the middle; Figure 8 This is a schematic diagram of the overflow groove structure of the present invention.

[0020] Numbering on the map: 1. Conductor; 2. Wrap conductive tape; 3. Shielding tape; 4. Supporting and anti-deformation mechanism; 401. Cross-linked polyethylene insulation layer; 402. Inner liner; 403. Splicing slot; 404. Limiting protrusion; 405. V-shaped support plate; 406. Corrugated sleeve; 407. Splicing ring; 408. Elastic support tube; 409. Steel-plastic composite pipe; 410. Inner reinforcing mesh; 411. Heat-conducting ring; 412. Support ring; 413. Outer reinforcing mesh; 414. Steel wire armor layer; 415. Waterproof sleeve; 5. Protective anti-bite mechanism; 501. Outer anti-corrosion sleeve; 502. Embedded groove; 503. Hollow rubber tube; 504. Divider plate; 505. Water-absorbing cotton swab; 506. Supporting rubber pad; 507. High-strength anti-bite sleeve; 508. Covering strip; 509. Overflow groove; 510. Drain outlet; 511. Discharge pipe; 512. Support rod; 513. Sealing ball. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] Example: Figures 1-8As shown, the present invention provides a technical solution: a cross-linked polyethylene insulated ultra-high voltage submarine cable, comprising a conductor 1, a wrapped conductive strip 2 sleeved on the outside of the conductor 1, a shielding strip 3 wound on the outside of the wrapped conductive strip 2, and a support and anti-deformation mechanism 4 provided on the outside of the shielding strip 3. The support and anti-deformation mechanism 4 includes a cross-linked polyethylene insulation layer 401, which is sleeved on the outside of the shielding strip 3. An inner sleeve 402 is sleeved on the outside of the cross-linked polyethylene insulation layer 401. A plurality of splicing slots 403 are evenly distributed around the outside of the inner sleeve 402 in the circumferential direction. The splicing slots 403 are filled with limiting protrusions 404, and V-shaped support plates 405 are equidistantly engaged on the outside of the limiting protrusions 404. A corrugated sleeve 406 is fitted onto the outer side of the inner bushing 402. Several splicing rings 407 are axially spaced and snapped onto the inner wall of the corrugated sleeve 406. Several elastic support tubes 408 are evenly distributed circumferentially between the inside of the splicing rings 407 and the outside of the inner bushing 402. In order to improve the toughness of the cable, the inner bushing 402 is made of epoxy resin. The limiting protrusion 404 is made of elastic rubber. One side of the V-shaped support plate 405 is fixedly connected to the inner wall of the splicing ring 407.

[0023] A steel-plastic composite pipe 409 is sleeved on the outside of the corrugated sleeve 406. An inner reinforcing mesh 410 is sleeved on the outside of the steel-plastic composite pipe 409. A heat-conducting ring 411 is sleeved on the outside of the inner reinforcing mesh 410. In order to facilitate the support of the steel-plastic composite pipe 409, the inner wall of the V-shaped support plate 405 on the outside of the elastic support pipe 408 inside the splicing ring 407 is in contact with the inner wall of the elastic support pipe 408 on the outside of the inner liner 402. The outer side of the elastic support pipe 408 on the outside of the inner liner 402 is in contact with the outer side of the V-shaped support plate 405.

[0024] A waterproof sleeve 415 is filled between the inner reinforcing mesh 410 and the heat-conducting ring 411. A support ring 412 is fitted between two adjacent heat-conducting rings 411 on the outside of the waterproof sleeve 415, and the two adjacent heat-conducting rings 411 are separated by the support ring 412. An outer reinforcing mesh 413 is fitted on the outside of the support ring 412 and the heat-conducting ring 411. A steel wire armor layer 414 is fitted on the outside of the outer reinforcing mesh 413. In order to increase the internal compressive strength of the cable, both the inner reinforcing mesh 410 and the outer reinforcing mesh 413 are welded from aluminum alloy. The thickness of the support ring 412 is equal to the thickness of the heat-conducting ring 411. The waterproof sleeve 415 is filled with water-blocking and heat-conducting grease.

[0025] A protective anti-bite mechanism 5 is provided on the outside of the steel wire armor layer 414. The protective anti-bite mechanism 5 includes an outer anti-corrosion sleeve 501, which is fitted onto the outside of the steel wire armor layer 414. Several embedded grooves 502 are evenly distributed around the outside of the outer anti-corrosion sleeve 501. Hollow rubber tubes 503 are filled inside the embedded grooves 502. Several partition plates 504 are axially spaced and snapped into the inside of the hollow rubber tubes 503. Water-absorbing cotton swabs 505 are filled between two adjacent partition plates 504 inside the hollow rubber tubes 503. In order to facilitate the dispersal of large fish, both the outer anti-corrosion sleeve 501 and the hollow rubber tubes 503 are made of polyvinyl chloride. The water-absorbing cotton swabs 505 absorb fish dispersing liquid, and the outside of the water-absorbing cotton swabs 505 is attached to the inner wall of the hollow rubber tubes 503.

[0026] A supporting rubber pad 506 is filled between two adjacent hollow rubber tubes 503 on the outer side of the outer anti-corrosion sleeve 501. A high-strength anti-bite sleeve 507 is fitted onto the outer side of the outer anti-corrosion sleeve 501, covering the hollow rubber tubes 503 and the supporting rubber pads 506. To ensure the cable's resilience, the supporting rubber pad 506 is made of highly elastic rubber. The inner wall of the high-strength anti-bite sleeve 507 is provided with several grooves, and the outer side of the hollow rubber tubes 503 is embedded in the grooves. Several covering strips 508 are circumferentially arranged on the outer side of the high-strength anti-bite sleeve 507. Several overflow grooves 509 are axially spaced inside the covering strips 508. To improve the anti-bite performance of the submarine cable, the high-strength anti-bite sleeve 507 is made of a mixture of polyurethane and aramid fiber. The covering strips 508 are made of elastic rubber and are brightly colored.

[0027] A drain port 510 is provided on the outer side of the high-strength anti-bite sleeve 507 at the bottom position of the overflow groove 509. A drain pipe 511 is snapped into the outer side of the hollow rubber tube 503 at the drain port 510. A support rod 512 is snapped into the bottom end of the cover strip 508. A sealing ball 513 is snapped into one end of the support rod 512 at the position inside the drain pipe 511. In order to facilitate sealing of the drain pipe 511, the installation position of the drain pipe 511 corresponds to the opening position of the overflow groove 509. The outer side of the sealing ball 513 is in contact with the inner wall of the drain pipe 511, and the diameter of the sealing ball 513 is larger than the diameter of the inner wall of the drain pipe 511. The inside of the drain pipe 511 is connected to the inside of the hollow rubber tube 503.

[0028] The working principle and usage process of this invention are as follows: First, the cross-linked polyethylene insulation layer 401 inside the inner bushing 402 increases the insulation effect of the submarine cable. V-shaped support plates 405 and splicing rings 407 are filled between the inner bushing 402 and the corrugated sleeve 406 to support the corrugated sleeve 406, thereby improving the internal compressive strength of the submarine cable, enabling it to withstand higher pressure and preventing deformation. At the same time, due to the cooperation of the corrugated sleeve 406, the cable still has good bending performance, improving its adaptability. In addition, the elastic support tubes 408 are alternately filled between the inner bushing 402 and the corrugated sleeve 406 to further enhance the bending effect and facilitate the cable's springback and reset.

[0029] Next, the submarine cable is reinforced using a steel-plastic composite pipe 409, maintaining a certain degree of bending effect. Then, through the cooperation of a waterproof sleeve 415 and a heat-conducting ring 411, the waterproof effect is ensured while facilitating the dissipation of heat from inside the cable to the outside, preventing the internal temperature of the cable from becoming too high. At the same time, the cooperation of an inner reinforcing mesh 410, a support ring 412, an outer reinforcing mesh 413, and a steel wire armor layer 414 further increases the compressive strength of the cable, making it less prone to breakage.

[0030] Next, the outer anti-corrosion sleeve 501 is used to increase the cable's corrosion resistance. At the same time, the embedded groove 502 is used to limit the hollow rubber tube 503, and the hollow rubber tube 503 is filled with a supporting rubber pad 506 to facilitate support for the high-strength anti-bite sleeve 507, reduce gaps, and prevent collapse. In addition, a cover strip 508 is installed on the outside of the high-strength anti-bite sleeve 507, and the outside of the cover strip 508 is painted with a bright color to warn fish and reduce the probability of fish biting. Furthermore, the high-strength anti-bite sleeve 507 has good tear resistance, reducing the damage to the cable caused by fish biting and increasing its service life.

[0031] When large fish continue to bite the cable, the high-strength anti-bite sleeve 507 is subjected to pressure, which squeezes the hollow rubber tube 503, and in turn squeezes the absorbent cotton swab 505 inside. This causes the fish-repelling liquid absorbed by the absorbent cotton swab 505 to be squeezed out. At the same time, the hollow rubber tube 503 collapses when squeezed, creating a gap between the outlet tube 511 and the sealing ball 513. This allows the fish-repelling liquid to be discharged through the outlet tube 511, the drain port 510, and the overflow trough 509, thus driving away the fish. After the fish leave, the high-strength anti-bite sleeve 507 loses pressure. The elasticity of the hollow rubber tube 503 and the supporting rubber pad 506 pushes the high-strength anti-bite sleeve 507 back to its original position, forcing the sealing ball 513 to reseal the outlet tube 511. This increases the service life of the fish-repelling liquid inside the absorbent cotton swab 505 and prevents it from being discharged all at once.

[0032] Finally, the absorbent cotton swabs 505 inside the hollow rubber tube 503 are stored separately by the partition plate 504, so that when fish bite, only the fish repellent liquid at the biting part is discharged, which increases the service life.

[0033] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cross-linked polyethylene insulated ultra-high voltage submarine cable, characterized in that, The system includes a conductor (1), a conductive wrapping strip (2) sleeved on the outside of the conductor (1), a shielding strip (3) wound on the outside of the conductive wrapping strip (2), and a support and anti-deformation mechanism (4) provided on the outside of the shielding strip (3). The support and anti-deformation mechanism (4) includes a cross-linked polyethylene insulation layer (401), which is sleeved on the outside of the shielding strip (3). An inner sleeve (402) is sleeved on the outside of the cross-linked polyethylene insulation layer (401). Several splicing slots (403) are arranged circumferentially on the outside of the inner sleeve (402). The splicing slots (403) are filled with limiting protrusions. 404), V-shaped support plates (405) are equidistantly arranged on the outer side of the limiting protrusion (404), a corrugated sleeve (406) is sleeved on the outer side of the inner liner (402), a number of splicing rings (407) are axially spaced and clamped on the inner wall of the corrugated sleeve (406), a number of elastic support tubes (408) are circumferentially arranged between the inside of the splicing ring (407) and the outside of the inner liner (402), a steel-plastic composite pipe (409) is sleeved on the outer side of the corrugated sleeve (406), an inner reinforcing mesh (410) is sleeved on the outer side of the steel-plastic composite pipe (409), and a heat-conducting ring (411) is sleeved on the outer side of the inner reinforcing mesh (410).

2. The cross-linked polyethylene insulated ultra-high voltage submarine cable according to claim 1, characterized in that, The inner liner (402) is made of epoxy resin, the limiting protrusion (404) is made of elastic rubber, and one side of the V-shaped support plate (405) is fixedly connected to the inner wall of the splicing ring (407).

3. The cross-linked polyethylene insulated ultra-high voltage submarine cable according to claim 1, characterized in that, The inner wall of the V-shaped support plate (405) on the outside of the elastic support tube (408) inside the splicing ring (407) is in contact with the inner wall of the elastic support tube (408) on the outside of the inner bushing (402) and the outer wall of the V-shaped support plate (405).

4. The cross-linked polyethylene insulated ultra-high voltage submarine cable according to claim 1, characterized in that, A waterproof sleeve (415) is filled between the inner reinforcing mesh (410) and the heat-conducting ring (411). A support ring (412) is sleeved between two adjacent heat-conducting rings (411) on the outside of the waterproof sleeve (415). An outer reinforcing mesh (413) is sleeved on the outside of both the support ring (412) and the heat-conducting ring (411). A steel wire armor layer (414) is sleeved on the outside of the outer reinforcing mesh (413).

5. A cross-linked polyethylene insulated ultra-high voltage submarine cable according to claim 4, characterized in that, The inner reinforcing mesh (410) and the outer reinforcing mesh (413) are both welded from aluminum alloy. The thickness of the support ring (412) is equal to the thickness of the heat-conducting ring (411). The waterproof sleeve (415) is filled with water-blocking and heat-conducting grease.

6. A cross-linked polyethylene insulated ultra-high voltage submarine cable according to claim 4, characterized in that, A protective anti-bite mechanism (5) is provided on the outside of the steel wire armor layer (414). The protective anti-bite mechanism (5) includes an outer anti-corrosion sleeve (501). The outer anti-corrosion sleeve (501) is sleeved on the outside of the steel wire armor layer (414). Several embedded grooves (502) are arranged around the outside of the outer anti-corrosion sleeve (501). Hollow rubber tubes (503) are filled inside the embedded grooves (502). Several partition plates (504) are axially spaced inside the hollow rubber tubes (503). Water-absorbing cotton swabs (505) are filled between two adjacent partition plates (504) inside the hollow rubber tubes (503). Supporting rubber pads (506) are filled between two adjacent hollow rubber tubes (503) on the outside of the outer anti-corrosion sleeve (501). A high-strength anti-bite sleeve (507) is fitted on the side. The high-strength anti-bite sleeve (507) covers the outside of the hollow rubber tube (503) and the supporting rubber pad (506). Several covering strips (508) are circumferentially attached to the outside of the high-strength anti-bite sleeve (507). Several overflow grooves (509) are spaced apart axially inside the covering strips (508). A drain port (510) is provided at the bottom of the overflow grooves (509) on the outside of the high-strength anti-bite sleeve (507). A drain pipe (511) is attached to the inside of the drain port (510) on the outside of the hollow rubber tube (503). A support rod (512) is attached to the bottom of the covering strip (508). A sealing ball (513) is attached to one end of the support rod (512) at the position inside the drain pipe (511).

7. A cross-linked polyethylene insulated ultra-high voltage submarine cable according to claim 6, characterized in that, The outer anti-corrosion sleeve (501) and the hollow rubber tube (503) are both made of polyvinyl chloride. The absorbent cotton swab (505) absorbs fish repellent liquid. The outer side of the absorbent cotton swab (505) is attached to the inner wall of the hollow rubber tube (503).

8. A cross-linked polyethylene insulated ultra-high voltage submarine cable according to claim 6, characterized in that, The supporting rubber pad (506) is made of high elastic rubber, and the inner wall of the high-strength anti-bite sleeve (507) is provided with several slots, and the outer side of the hollow rubber tube (503) is embedded in the slots.

9. A cross-linked polyethylene insulated ultra-high voltage submarine cable according to claim 6, characterized in that, The high-strength anti-bite sleeve (507) is made of polyurethane and aramid fiber, and the cover strip (508) is made of elastic rubber.

10. A cross-linked polyethylene insulated ultra-high voltage submarine cable according to claim 6, characterized in that, The installation position of the liquid outlet pipe (511) corresponds to the opening position of the overflow groove (509). The outer side of the sealing ball (513) is in contact with the inner wall of the liquid outlet pipe (511), and the diameter of the sealing ball (513) is larger than the diameter of the inner wall of the liquid outlet pipe (511). The inside of the liquid outlet pipe (511) is connected to the inside of the hollow rubber tube (503).

Images