Submarine cable sealing device and submarine cable protection equipment

Abstract

The invention discloses a submarine cable sealing device and submarine cable protection equipment, and belongs to the technical field of submarine cables. The sealing assembly is arranged outside the submarine cable part and comprises a heat preservation sleeve layer which sleeves the peripheral side of the submarine cable part in a non-contact manner and a rubber protection sleeve which is coaxially arranged in an inner cavity of the heat preservation sleeve layer and sleeves the peripheral side of the submarine cable part in a non-contact manner; the vacuum sealing protection assembly is arranged between the submarine cable part and the sealing assembly, the vacuum sealing protection assembly comprises a vacuum air bag and a vacuumizing pipe, the vacuum air bag sleeves the peripheral side of the submarine cable part in a direct contact mode, and the vacuumizing pipe is communicated with the vacuum air bag and is responsible for being connected with an external vacuum pump for vacuumizing, so that the submarine cable part is in vacuum of the vacuum air bag; and the vacuum air bag is directly and elastically pressed against and wrapped by the rubber protective sleeve. The vacuum environment can effectively prevent water and other corrosive substances from invading, materials in the submarine cable are prevented from being corroded, and meanwhile the insulation performance reduction caused by moisture is prevented.

Description

Technical Field

[0001] The invention belongs to the technical field of submarine cables, in particular to a submarine cable sealing device and a submarine cable protection device. Background Art

[0002] Submarine cable (undersea cable) refers to a cable laid on the seabed for transmitting electricity or data. Submarine cables are divided into submarine communication cables and submarine power cables. Modern submarine cables use optical fiber as a material to transmit telephone and Internet signals. There are generally two types of submarine cables: one is an optoelectronic composite submarine cable; the other is a submarine power cable; composite cables are used for long-distance, long-length communications and power transmission, while submarine cables are only used for single power transmission.

[0003] For example, the submarine cable sealing device and submarine cable protection equipment disclosed in the existing Chinese patent announcement number: CN115833026B include: a sealing mechanism, including a sealing ring, a plurality of push rods rotatably and movably arranged relative to the sealing ring, and the sealing ring is located inside the J tube; and a transmission mechanism; the transmission mechanism includes: a plurality of first gears, at least one first gear is connected to the first end of a push rod; an inner gear ring, the inner gear ring is meshed with all the first gears; a second gear, the second gear is meshed with the inner gear ring, and the second gear is constructed to input rotational power to the inner gear ring; and a second rotating rod, the first end of the second rotating rod is fixedly connected to the second gear, and the second rotating rod is constructed to drive the second gear to rotate, etc.

[0004] During the construction phase, submarine cables need to be deeply buried for protection to reduce the impact of the complex marine environment on submarine cables and ensure safe operation. Submarine cables face many challenges in the marine environment, including seawater erosion, external pressure and impact, and biological attachment.

[0005] Traditional submarine cable protection methods mainly include simple plastic sleeves, metal protective layers and sealants, etc. However, these methods have some shortcomings, such as: Traditional methods often rely on a single sealing layer, such as sealants or plastic sleeves, which are prone to aging and cracking under long-term immersion and humid environments, leading to moisture intrusion, corrosion of internal materials and degradation of electrical performance. Summary of the invention

[0006] The object of the present invention is to provide a submarine cable sealing device and a submarine cable protection device to solve the problems raised in the background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a submarine cable sealing device, comprising:

[0008] Submarine cable components;

[0009] A sealing assembly is arranged outside the submarine cable component and comprises a heat-insulating sleeve layer which is non-contactly sleeved around the submarine cable component and a rubber protective sleeve which is coaxially arranged in the inner cavity of the heat-insulating sleeve layer and non-contactly sleeved around the submarine cable component;

[0010] The vacuum sealing protection component is arranged between the submarine cable component and the sealing component. The vacuum sealing protection component includes a vacuum air bag which is directly contacted and sealed on the peripheral side of the submarine cable component, and a vacuum tube which is connected to the vacuum air bag and is responsible for connecting to an external vacuum pump to extract vacuum, so that the submarine cable component is in the vacuum of the vacuum air bag.

[0011] The vacuum air bag is directly sealed and sleeved on the peripheral side of the submarine cable component. When the external vacuum pump draws the vacuum air bag through the vacuum pipe, the inside of the vacuum air bag is in a vacuum state. The vacuum air bag is vacuum-contracted and tightly wrapped around the peripheral outer wall of the submarine cable component, so that the submarine cable component located in the vacuum section can be prevented from moisture intrusion by the vacuum air bag in the vacuum state, thereby preventing the internal material from being corroded. At the same time, the vacuum sealing performance also helps to maintain the electrical performance of the submarine cable component and avoid the degradation of insulation performance due to moisture or other factors. The vacuum air bag can provide additional physical protection to prevent the submarine cable from being damaged by external pressure or impact.

[0012] Preferably, sealing rings are symmetrically sleeved on both ends of the vacuum air bag and on the outer wall of the peripheral side of the submarine cable component, and the inner wall of each sealing ring is sealed and connected to the outer wall of the submarine cable component through a second sealing silicone ring.

[0013] Preferably, the vacuum air bag is sealed and connected between two sealing rings, and the two sealing rings are coaxially connected with connecting sleeves at opposite ends, and magnet inner rings are welded to the outer walls of the circumferential sides of the two connecting sleeves at opposite ends, and there is a depth difference between the magnet inner ring and the connecting sleeve.

[0014] In the preferred embodiment of the present invention, both ends of the vacuum air bag are sleeved through the inner ring of the magnet and extended to wrap around the circumferential outer wall of the connecting sleeve, and a clamp is clamped on the outer wall of the end of the vacuum air bag in the connecting sleeve with a depth difference.

[0015] Preferably, the clamping hoop tightly wraps the end of the vacuum air bag in the connecting sleeve, and after the vacuum air bag is put through the inner ring of the magnet, both ends of the vacuum air bag have wrapped arched portions, and the outer wall of one end of the vacuum air bag has a vacuum port for connecting a vacuum tube, and a circle of activated carbon gasket is bonded to the inner wall of the rubber protective sleeve, and when the vacuum air bag is evacuated and shrink-wrapped around the submarine cable, the activated carbon gasket is elastically squeezed and wrapped around the outer wall of the vacuum air bag by the rubber protective sleeve itself.

[0016] Preferably, both ends of the rubber protective sleeve are fixedly and sealedly connected with magnet outer rings. When the rubber protective sleeve is sleeved on the outside of the vacuum air bag, the two magnet outer rings are magnetically attracted to the two sealing rings respectively. When the magnet inner ring and the magnet outer ring are magnetically attracted together, the two ends of the vacuum air bag are squeezed and fixed.

[0017] Preferably, the inner wall of the clamp is densely provided with anti-skid protrusions, and when the clamp is tightly wrapped around the vacuum air bag on the outer wall of the connecting sleeve, the anti-skid protrusions abut against the outer wall of the vacuum air bag.

[0018] The present invention also provides a submarine cable protection device, which is applied to the submarine cable sealing device as described above, comprising a protective outer steel pipe and a sealing assembly, wherein a protective inner steel pipe is concentrically arranged in the inner cavity of the protective outer steel pipe, and four supporting ribs are fixed in an annular array in the annular gap chamber between the protective inner steel pipe and the protective outer steel pipe, and the supporting ribs symmetrically divide the annular gap chamber into a plurality of equally divided chambers;

[0019] The two ends of each supporting rib are respectively and integrally connected with a first amplification support foot and a second amplification support foot, wherein the first amplification support foot is fixedly connected to the inner wall of the protective outer steel pipe, and the second amplification support foot is connected to the outer wall of the protective inner steel pipe.

[0020] In this solution, the sealing assembly is inserted into the inner cavity of the protective inner steel pipe, and the circumferential sides of the two magnet outer sleeves are sealed and inserted into the inner cavity of the protective inner steel pipe through the first sealing silicone ring, so that the outer wall of the insulation sleeve layer abuts against the inner wall of the protective inner steel pipe;

[0021] An elastic buffer wave support plate is fixed in the middle position of each of the equally divided chambers, and the upper and lower outer walls of the elastic buffer wave support plate are respectively connected to the inner wall of the protective outer steel pipe and the outer wall of the protective inner steel pipe. The outer walls on both sides of each of the elastic buffer wave support plates have sealing side plates, and each of the sealing side plates and the adjacent supporting ribs are filled with foam filler.

[0022] Preferably, the buffer energy absorption grooves on the upper and lower sides of each elastic buffer wave support plate are filled with buffer rubber support blocks, and the outer walls of the upper and lower buffer rubber support blocks facing each other elastically abut against the inner wall of the protective outer steel pipe and the outer wall of the protective inner steel pipe respectively.

[0023] Compared with the prior art, the technical effects and advantages of the present invention are as follows:

[0024] The submarine cable sealing device and submarine cable protection device can form a highly sealed vacuum environment around the submarine cable component through the combination of a vacuum air bag and a vacuum tube. The vacuum environment can effectively prevent the intrusion of moisture and other corrosive substances, and prevent the internal materials of the submarine cable component from being corroded. The vacuum sealing performance helps to maintain the electrical performance of the submarine cable component and prevent the degradation of insulation performance due to moisture. The vacuum air bag in a vacuum state can provide additional physical protection to prevent the submarine cable from being damaged by external pressure or impact.

[0025] The vacuum environment and multi-layer sealing design can reduce the impact of external electromagnetic interference on submarine cable components. In a strong electromagnetic environment, this design can improve the stability and reliability of signal transmission and reduce noise interference.

[0026] The combination of the thermal insulation layer and the activated carbon gasket effectively controls the internal temperature and humidity. The thermal insulation layer can reduce heat loss, maintain the stability of the internal temperature, and prevent the influence of temperature changes on the submarine cable components. The activated carbon gasket can absorb moisture and fine particles, maintain a dry and clean environment in the vacuum air bag, and further improve the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a structural schematic diagram of the present invention;

[0029] Figure 2 It is a schematic diagram of the connection structure of the rubber protective sleeve of the present invention;

[0030] Figure 3 This is a schematic diagram of the disassembly structure of the thermal insulation jacket of the present invention;

[0031] Figure 4 It is a schematic diagram of the connection structure between the submarine cable assembly and the vacuum air bag of the present invention;

[0032] Figure 5 It is a schematic diagram of the connection structure of the vacuum air bag of the present invention;

[0033] Figure 6 It is a schematic diagram of the structure of the sealing ring of the present invention;

[0034] Figure 7 It is a structural schematic diagram of the hoop member of the present invention;

[0035] Figure 8 It is a structural schematic diagram of the submarine cable protection device of the present invention;

[0036] Fig. 9 It is a schematic diagram of the disassembly structure of the protective end cover of the present invention;

[0037] Fig.10 It is a schematic diagram of the installation structure of the protective inner steel pipe of the present invention;

[0038] Fig.11 It is a side view of the protective outer steel pipe of the present invention;

[0039] Fig.12 It is a schematic diagram of the structure of the elastic buffer wave support plate of the present invention;

[0040] Fig.13 It is a schematic diagram of the installation of the activated carbon gasket of the present invention.

[0041] Description of reference numerals:

[0042] In the figure: 1, submarine cable component; 2, sealing component; 3, vacuum sealing protection component; 4, sealing ring; 5, magnet outer ring; 6, thermal insulation sleeve; 7, first sealing silicone ring; 8, rubber protective sleeve; 9, sleeve joint; 10, vacuum tube;

[0043] 11. Through hole; 12. Vacuum air bag; 13. Vacuum port; 14. Hoop; 15. Wrapping arch; 16. Second sealing silicone ring; 17. Magnet inner ring; 18. Connecting sleeve; 19. Anti-slip bump; 20. Protective outer steel pipe;

[0044] 21. Protective end cap; 22. External thread; 23. Third sealing silicone ring; 24. Protective inner steel pipe; 25. Support ribs; 26. First expansion foot; 27. Equally divided chamber; 28. Elastic buffer wave support plate; 29. ​​Sealing side plate; 30. Foam filler;

[0045] 31. Second amplified support leg; 32. Buffer energy absorption groove; 33. Buffer rubber support block; 34. Activated carbon gasket. DETAILED DESCRIPTION

[0046] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0047] Unless otherwise defined, the up, down, left, right, front, back, inside and outside directions involved in this document are based on the up, down, left, right, front, back, inside and outside directions in the figures shown in the present invention, and are explained here together.

[0048] Embodiment 1

[0049] This embodiment provides Figures 1 to 13 A submarine cable sealing device shown includes: a submarine cable component 1, a sealing assembly 2 and a vacuum sealing protection assembly 3.

[0050] In this embodiment, the submarine cable component 1 is used as the core part of the entire device to transmit power or data signals, ensure the efficient transmission of power or data signals, ensure the normal operation of the submarine cable system, and is the basis of the entire system. The sealing component 2 is arranged on the outside of the submarine cable component 1 and includes a thermal insulation layer 6 that is non-contactly sleeved on the side of the submarine cable component 1 and a rubber protective sleeve 8 that is coaxially arranged in the inner cavity of the thermal insulation layer 6 and non-contactly sleeved on the side of the submarine cable component 1; the sealing component 2 provides external environmental isolation to protect the submarine cable component 1 from external influences. The thermal insulation layer 6, the rubber protective sleeve 8, and the magnet outer ring 5 work together to ensure the sealing and stability of the internal structure. The overall waterproof, anti-corrosion ability and thermal insulation performance are enhanced. The thermal insulation layer 6 provides additional thermal insulation performance, reduces heat loss, and at the same time increases sealing and stability, protects the internal structure from temperature changes, and extends the service life. In the marine environment, temperature changes may have a significant impact on the performance and life of the cable. The insulation sleeve 6 can reduce the transfer of heat, keep the temperature inside the cable relatively constant, and avoid performance changes caused by temperature fluctuations. In the deep sea environment, the water temperature is low and the temperature difference is large. The insulation sleeve 6 can ensure the stability of the temperature inside the cable and prevent the material from becoming brittle and the performance from being degraded due to low temperature. The insulation sleeve 6 is made of polyurethane foam, which has excellent thermal insulation and good waterproof properties and is suitable for humid environments. The rubber protective sleeve 8 provides elastic protection and works with the activated carbon gasket 34. It can absorb vibrations and filter moisture and impurities, thereby enhancing the overall buffering and filtering performance. The rubber protective sleeve 8 has a sleeve fitting 9 on the outside, which is sunk to the magnet outer sleeve 5 at both ends. When the insulation sleeve 6 is sleeved on the sleeve fitting 9 of the rubber protective sleeve 8, the outer wall of the insulation sleeve 6 is flush with the outer wall of the first sealing silicone ring 7 on the periphery of the magnet outer sleeve 5 at both ends, which is convenient for interference fit in the protection inner steel pipe 24.

[0051] In this embodiment, the vacuum sealing protection component 3 is arranged between the submarine cable component 1 and the sealing component 2. The vacuum sealing protection component 3 includes a vacuum air bag 12 which is directly contact-type sealed and sleeved on the peripheral side of the submarine cable component 1, and a vacuum tube 10 which is connected to the vacuum air bag 12 and is responsible for connecting to an external vacuum pump to extract vacuum, so that the submarine cable component 1 is in the vacuum of the vacuum air bag 12. The vacuum sealing protection component 3 creates and maintains a vacuum environment around the submarine cable component 1. The vacuum is extracted by an external vacuum pump to ensure the internal vacuum state. It effectively prevents moisture intrusion, avoids corrosion of internal materials, maintains the electrical properties of the submarine cable component 1, and prevents the insulation performance from deteriorating. The vacuum air bag 12 provides a vacuum environment to prevent moisture intrusion, is directly sealed and sleeved on the peripheral side of the submarine cable component 1, extracts vacuum through an external vacuum pump, shrinks and tightly wraps the submarine cable component 1, effectively prevents moisture intrusion, avoids corrosion of internal materials, and maintains electrical properties.

[0052] In this embodiment, the vacuum air bag 12 is directly sealed and sleeved on the peripheral side of the submarine cable component 1. When the external vacuum pump extracts the vacuum air bag 12 through the vacuum tube 10, the vacuum air bag 12 is in a vacuum state. The vacuum air bag 12 is vacuum-contracted and tightly wrapped on the peripheral outer wall of the submarine cable component 1, so that the submarine cable component 1 located in the vacuum section can prevent moisture from intruding through the vacuum air bag 12, thereby preventing the internal material from being corroded. At the same time, the vacuum sealing performance also helps to maintain the electrical performance of the submarine cable component 1 and avoid the degradation of insulation performance due to moisture. The vacuum air bag 12 can provide additional physical protection to prevent the submarine cable from being damaged by external pressure or impact.

[0053] In this embodiment, sealing rings 4 are symmetrically sleeved on the outer wall of the circumference of the submarine cable component 1 at both ends of the vacuum air bag 12, and the inner wall of each sealing ring 4 is sealed and connected to the outer wall of the submarine cable component 1 through the second sealing silicone ring 16. The sealing ring 4 ensures the sealing between the two ends of the vacuum air bag 12 and the submarine cable component 1, and is used in conjunction with the second sealing silicone ring 16 to prevent vacuum leakage. The stability and reliability of the vacuum environment are improved. The second sealing silicone ring 16 ensures the sealing between the sealing ring 4 and the submarine cable component 1, fills the gap, prevents vacuum leakage, and improves the overall sealing performance.

[0054] In this embodiment, the vacuum air bag 12 is sealed and connected between two sealing rings 4. The two sealing rings 4 are coaxially connected to the opposite ends of the two sealing rings 4. The outer walls of the circumferences of the opposite ends of the two connecting sleeves 18 are welded with magnet inner rings 17. There is a depth difference between the magnet inner ring 17 and the connecting sleeve 18. The magnet inner ring 17 cooperates with the magnet outer ring 5 to enhance the sealing and fastening properties. Through magnetic connection, the position of the vacuum air bag 12 is fixed to prevent the vacuum air bag 12 from falling off, and ensure the continuity of the vacuum environment.

[0055] In this embodiment, both ends of the vacuum air bag 12 are covered by the inner magnet ring 17 and extended to wrap around the outer wall of the peripheral side of the connecting sleeve 18. A clamping hoop 14 is clamped in the connecting sleeve 18 with a depth difference and located at the outer wall of the end of the vacuum air bag 12. The clamping hoop 14 fastens the vacuum air bag 12 to the connecting sleeve 18 to prevent the vacuum air bag 12 from falling off in the vacuum state, thereby ensuring the continuity and reliability of the vacuum environment.

[0056] In this embodiment, the clamping hoop 14 is tightly wrapped in the connecting sleeve 18. After the vacuum air bag 12 is put through the magnet inner ring 17, both ends of the vacuum air bag 12 have a wrapped arch 15. The outer wall of one end of the vacuum air bag 12 has a vacuum port 13 for connecting the vacuum tube 10. A circle of activated carbon gasket 34 is bonded to the inner wall of the rubber protective sleeve 8. When the vacuum air bag 12 is evacuated and shrinks to wrap the submarine cable component 1, the activated carbon gasket 34 is elastically squeezed and wrapped in the vacuum by the rubber protective sleeve 8 itself. On the outer wall of the airbag bag 12, the activated carbon gasket 34 acts in a sealed environment to dehumidify and filter, not only absorbing moisture entering from the rubber protective sleeve 8, but also absorbing moisture in the vacuum airbag bag 12 in a vacuum state, thereby increasing the dryness of the vacuum environment of the vacuum airbag bag 12. At the same time, a dry environment is not conducive to the growth of microorganisms, reducing the possibility of biological erosion, filtering and blocking fine particles and impurities from entering the rubber protective sleeve 8 into the vacuum airbag bag 12 and the submarine cable component 1, thereby protecting internal components from physical damage.

[0057] In this embodiment, both ends of the rubber protective sleeve 8 are fixedly and sealedly connected with a magnet outer ring 5. When the rubber protective sleeve 8 is sleeved on the outside of the vacuum air bag 12, the two magnet outer rings 5 ​​are magnetically attracted to the two sealing rings 4 respectively. When the magnet inner ring 17 and the magnet outer ring 5 are magnetically attracted together, the two ends of the vacuum air bag 12 are squeezed and fixed. Thereby, the tightness and sealing of the vacuum air bag 12 are increased to prevent it from falling off. The thermal insulation layer 6 is sleeved and wrapped on the outer wall of the rubber protective sleeve 8, so that when the thermal insulation layer 6 and the rubber protective sleeve 8 cooperate to increase the sealing, heat preservation and moisture-proof, it can also improve the connection stability and prevent the rubber protective sleeve 8 from loosening. A through hole 11 for the vacuum pumping tube 10 to pass through is opened inside the magnet outer ring 5 near the vacuum port 13. The magnet outer ring 5 cooperates with the magnet inner ring 17 to enhance the tightness and sealing of the vacuum air bag 12. Through the magnetic connection, the position of the vacuum air bag 12 is fixed to prevent the vacuum air bag 12 from falling off, ensuring the continuity of the vacuum environment. The through hole 11 allows the vacuum tube 10 to pass through the magnet outer ring 5, providing a passage without affecting the sealing performance, thereby ensuring the smooth progress of the vacuum extraction process.

[0058] In this embodiment, the inner wall of the hoop 14 is densely provided with anti-skid protrusions 19. When the hoop 14 is tightly wrapped around the vacuum air bag 12 on the outer wall of the connecting sleeve 18, the anti-skid protrusions 19 abut against the outer wall of the vacuum air bag 12. This increases the tightness of the vacuum air bag 12, and at the same time, the two ends of the vacuum air bag 12 are locked on the outer wall of the connecting sleeve 18 with a depth drop. In addition, the magnetic attraction between the inner magnet ring 17 and the outer magnet ring 5 prevents the vacuum air bag 12 from falling off, thereby improving the vacuum sealing of the vacuum air bag 12. The anti-skid protrusions 19 increase the friction between the hoop 14 and the vacuum air bag 12, prevent sliding, and ensure the tightness and sealing of the vacuum air bag 12.

[0059] Embodiment 2

[0060] like Figures 1 to 13 As shown, this embodiment provides a submarine cable protection device, which is applied to the submarine cable sealing device as described in the first embodiment, including a protective outer steel pipe 20 and a sealing assembly 2. A protective inner steel pipe 24 is concentrically arranged in the inner cavity of the protective outer steel pipe 20. The protective inner steel pipe 24 provides internal support, protects the internal components from external pressure, and enhances the stability and safety of the internal structure. Four supporting ribs 25 are fixed in an annular array in the annular gap chamber between the protective inner steel pipe 24 and the protective outer steel pipe 20. The supporting ribs 25 symmetrically divide the annular gap chamber into a plurality of equally divided chambers 27; the protective outer steel pipe 20 provides external physical protection to prevent external pressure and impact from damaging the internal structure, thereby enhancing the overall durability and safety. The supporting ribs 25 divide the space between the protective outer steel pipe 20 and the protective inner steel pipe 24 into a plurality of equally divided chambers 27, enhance the structural stability, and improve the rigidity and pressure resistance of the overall structure. The equally divided chambers 27 are filled with foam fillers 30 to improve the sealing and buffering performance, provide separation space, prevent the leakage of fillers, and improve the overall sealing and buffering performance.

[0061] In this embodiment, the two ends of each support rib 25 are respectively integrally connected with a first amplified support foot 26 and a second amplified support foot 31, the first amplified support foot 26 is fixedly connected to the inner wall of the protective outer steel pipe 20, and the second amplified support foot 31 is connected to the outer wall of the protective inner steel pipe 24. The design of the first amplified support foot 26 and the second amplified support foot 31 can not only increase the contact area with the protective outer steel pipe 20 and the protective inner steel pipe 24, but also improve the stability of the support rib 25 and prevent breakage.

[0062] In this embodiment, the sealing component 2 is inserted into the inner cavity of the protective inner steel pipe 24, and the circumferential sides of the two magnet outer rings 5 ​​are sealed and inserted into the inner cavity of the protective inner steel pipe 24 through the first sealing silicone ring 7, so that the outer wall of the insulation sleeve 6 abuts against the inner wall of the protective inner steel pipe 24; the first sealing silicone ring 7 ensures the sealing between the sealing component 2 and the protective inner steel pipe 24, fills the gap, prevents water vapor intrusion, and improves the overall waterproof performance.

[0063] In this embodiment, an elastic wave buffering support plate 28 is fixed in the middle position of each equally divided chamber 27, and the upper and lower outer walls of the elastic wave buffering support plate 28 are respectively connected to the inner wall of the protective outer steel pipe 20 and the outer wall of the protective inner steel pipe 24, and the outer walls on both sides of each elastic wave buffering support plate 28 are provided with a blocking side plate 29, and the blocking side plate 29 closes the equally divided chamber 27 to ensure that the foam filler 30 does not leak, thereby improving the overall sealing and stability. Each blocking side plate 29 is filled with a foam filler 30 between the adjacent supporting ribs 25. The elastic wave buffering support plate 28 itself is elastic and can absorb and buffer the force from the mechanical collision of the protective outer steel pipe 20 in the seabed, so that the elastic wave buffering support plate 28 and the buffer rubber support block 33 absorb and buffer, and at the same time support the protective outer steel pipe 20 and the protective inner steel pipe 24 to prevent deformation. The foam filler 30 can not only improve the sealing, but also play a buffering role, and can also prevent moisture, so that the protective outer steel pipe 20 has a dry environment. The elastic buffer wave support plate 28 absorbs and buffers the force generated by external mechanical collision, and works together with the buffer rubber support block 33 to provide multi-layer buffering, protect the internal structure from external impact, and extend the service life.

[0064] In this embodiment, the buffer energy absorption grooves 32 on the upper and lower sides of each elastic buffer wave support plate 28 are filled with buffer rubber support blocks 33. The buffer rubber support blocks 33 work together with the elastic buffer wave support plate 28 to further improve the buffering performance, absorb and disperse the impact energy, protect the internal structure from the impact of external impact, and extend the service life. The outer walls of the upper and lower opposite buffer rubber support blocks 33 elastically abut against the inner wall of the protective outer steel pipe 20 and the outer wall of the protective inner steel pipe 24 respectively. The outer walls of both ends of the protective outer steel pipe 20 have external threaded teeth 22. Each external threaded tooth 22 is threadedly connected with a protective end cap 21. The protective end cap 21 closes the two ends of the protective outer steel pipe 20 to provide sealing protection, prevent water vapor and impurities from entering the interior, and protect the internal structure. The submarine cable component 1 passes through the protective end cap 21, and the central through hole of the protective end cap 21 is connected to the submarine cable component 1 through the third sealing silicone ring 23, so that the submarine cable component 1 can pass through and seal. The third sealing silicone ring 23 ensures the sealing between the protective end cap 21 and the submarine cable component 1, fills the gap, prevents water vapor from intruding, and improves the overall sealing performance. The vacuum tube 10 is an L-shaped structure, and one end of the vacuum tube 10 extending from the magnet outer ring 5 passes through the outer wall of the adjacent protective end cap 21, so that the vacuum tube 10 extends from the protective end cap 21 for connection with an external vacuum pump.

[0065] Working principle:

[0066] The submarine cable sealing device and submarine cable protection equipment connect one end of the vacuum tube 10 to the inside of the vacuum air bag 12 through the vacuum port 13, and the other end is connected to an external vacuum pump. The external vacuum pump is started to extract the air inside the vacuum air bag 12 through the vacuum tube 10, so that a vacuum state is formed inside the vacuum air bag 12. As the vacuum degree increases, the vacuum air bag 12 gradually shrinks and tightly wraps around the outer wall of the submarine cable component 1 to form a closed vacuum environment. Under the vacuum state, the pressure inside the vacuum air bag 12 is reduced, further preventing the intrusion of moisture and other harmful substances, and protecting the submarine cable component 1 from corrosion and damage.

[0067] A circle of activated carbon gasket 34 is bonded to the inner wall of the rubber protective sleeve 8. When the vacuum air bag 12 is evacuated and shrinks, the activated carbon gasket 34 is elastically squeezed by the rubber protective sleeve 8 and tightly wrapped on the outer wall of the vacuum air bag 12, absorbing moisture and fine particles to keep the vacuum environment dry and clean. The thermal insulation sleeve 6 is sleeved on the outer wall of the rubber protective sleeve 8 to provide additional thermal insulation performance, reduce heat loss, and increase sealing and stability.

[0068] The protective outer steel pipe 20 and the protective inner steel pipe 24 are sleeved on the outside of the insulation sleeve 6 to provide external physical protection to prevent external pressure and impact from damaging the internal structure. The protective end cover 21 is threadedly connected to the two ends of the protective outer steel pipe 20 through the external threaded tooth path 22 to ensure the sealing between the protective end cover 21 and the protective outer steel pipe 20 to prevent water vapor and impurities from entering the interior.

[0069] Four supporting ribs 25 are fixed in the annular gap chamber between the protective inner steel pipe 24 and the protective outer steel pipe 20, symmetrically dividing the annular gap chamber into a plurality of equally divided chambers 27. An elastic buffering wave support plate 28 is fixed in the middle position of each equally divided chamber 27. The upper and lower outer walls of the elastic buffering wave support plate 28 are respectively connected to the inner wall of the protective outer steel pipe 20 and the outer wall of the protective inner steel pipe 24 to provide multi-layer buffering and support. The outer walls on both sides of the elastic buffering wave support plate 28 have sealing side plates 29. The sealing side plates 29 and the adjacent supporting ribs 25 are filled with foam fillers 30 to further improve the sealing and buffering performance.

[0070] The buffering energy absorption grooves 32 on the upper and lower sides of each elastic buffering wave support plate 28 are filled with buffering rubber support blocks 33. The upper and lower surfaces of the buffering rubber support blocks 33 elastically abut against the inner wall of the protective outer steel pipe 20 and the outer wall of the protective inner steel pipe 24 respectively, providing additional buffering and energy absorption effects.

[0071] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A submarine cable sealing device, characterized in that: include: Submarine cable component (1); A sealing assembly (2) is arranged outside the submarine cable component (1) and comprises a heat-insulating sleeve (6) which is non-contactly sleeved around the submarine cable component (1) and a rubber protective sleeve (8) which is coaxially arranged in the inner cavity of the heat-insulating sleeve (6) and non-contactly sleeved around the submarine cable component (1); A vacuum sealing protection component (3) is arranged between the submarine cable component (1) and the sealing component (2), and the vacuum sealing protection component (3) comprises a vacuum air bag (12) which is directly and sealedly sleeved on the peripheral side of the submarine cable component (1) and a vacuum extraction pipe (10) which is connected to the vacuum air bag (12) and is responsible for connecting to an external vacuum pump to extract vacuum, so that the submarine cable component (1) is in the vacuum of the vacuum air bag (12).

2. A submarine cable sealing device according to claim 1, characterized in that: Sealing rings (4) are symmetrically sleeved on the two ends of the vacuum air bag (12) and on the peripheral outer wall of the submarine cable component (1), and the inner wall of each sealing ring (4) is sealed and connected to the outer wall of the submarine cable component (1) via a second sealing silicone ring (16).

3. A submarine cable sealing device according to claim 2, characterized in that: The vacuum air bag (12) is sealed and connected between two sealing rings (4); the two sealing rings (4) are integrally and coaxially connected with a connecting sleeve (18) at opposite ends; the outer walls of the circumferential sides of the two connecting sleeves (18) are welded with a magnet inner ring (17); and there is a depth difference between the magnet inner ring (17) and the connecting sleeve (18).

4. A submarine cable sealing device according to claim 3, characterized in that: Both ends of the vacuum air bag (12) are sleeved through the inner magnet ring (17) and extend to wrap around the peripheral outer wall of the connecting sleeve (18); a clamping hoop (14) is clamped on the outer wall of the end of the vacuum air bag (12) in the connecting sleeve (18) with a depth difference.

5. A submarine cable sealing device according to claim 4, characterized in that: The clamping hoop (14) is tightly wrapped around the end of the vacuum air bag (12) in the connecting sleeve (18). After the vacuum air bag (12) is passed through the inner ring (17) of the magnet, both ends of the vacuum air bag (12) have wrapped arched portions (15). The outer wall of one end of the vacuum air bag (12) has a vacuum port (13) for connecting the vacuum pipe (10). A circle of activated carbon gasket (34) is bonded to the inner wall of the rubber protective sleeve (8). When the vacuum air bag (12) is evacuated and shrink-wrapped around the submarine cable (1), the activated carbon gasket (34) is elastically squeezed and wrapped around the outer wall of the vacuum air bag (12) by the rubber protective sleeve (8), so that the activated carbon gasket (34) acts in a sealed environment.

6. A submarine cable sealing device according to claim 5, characterized in that: Both ends of the rubber protective sleeve (8) are fixedly and sealedly connected with magnet outer rings (5), and the circumferential sides of the two magnet outer rings (5) are sleeved with first sealing silicone rings (7). When the rubber protective sleeve (8) is sleeved on the outside of the vacuum air bag (12), the two magnet outer rings (5) are magnetically attracted to the two sealing rings (4) respectively, and when the magnet inner ring (17) and the magnet outer ring (5) are magnetically attracted together, the two ends of the vacuum air bag (12) are squeezed and fixed.

7. A submarine cable sealing device according to claim 6, characterized in that: The inner wall of the hoop member (14) is densely provided with anti-skid protrusions (19); when the hoop member (14) is tightly wrapped around the outer wall of the connecting sleeve (18) to wrap around the vacuum air bag (12), the anti-skid protrusions (19) abut against the outer wall of the vacuum air bag (12).

8. A submarine cable protection device, characterized in that: A submarine cable sealing device according to any one of claims 1 to 7, comprising a protective outer steel pipe (20) and a sealing assembly (2), wherein a protective inner steel pipe (24) is concentrically arranged in the inner cavity of the protective outer steel pipe (20), and four supporting ribs (25) are fixed in an annular array in an annular gap chamber between the protective inner steel pipe (24) and the protective outer steel pipe (20), and the supporting ribs (25) symmetrically divide the annular gap chamber into a plurality of equally divided chambers (27); The two ends of each supporting rib (25) are respectively integrally connected with a first amplification support foot (26) and a second amplification support foot (31); the first amplification support foot (26) is fixedly connected to the inner wall of the protective outer steel pipe (20); and the second amplification support foot (31) is connected to the outer wall of the protective inner steel pipe (24).

9. A submarine cable protection device according to claim 8, characterized in that: The sealing component (2) is inserted into the inner cavity of the protective inner steel pipe (24), and the outer wall of the thermal insulation sleeve (6) abuts against the inner wall of the protective inner steel pipe (24); An elastic wave-buffering support plate (28) is fixed at the middle position of each equally divided chamber (27), and both side outer walls of each elastic wave-buffering support plate (28) have blocking side plates (29), and a foam filler (30) is filled between each blocking side plate (29) and an adjacent supporting rib (25).

10. A submarine cable protection device according to claim 9, characterized in that: The buffering energy absorbing grooves (32) on the upper and lower sides of each elastic buffering wave support plate (28) are filled with buffering rubber support blocks (33).

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