Underwater transmission cable anti-collision structure and installation method

Abstract

The present invention provides an anti-collision structure and installation method for underwater transmission cables, including: an optical and electrical branch cable, an optical and electrical branch cable equipment-end connector, an optical and electrical branch cable submarine cable-end connector, a compression sleeve, a rubber protection cover, and a rubber protection sleeve; one end of the optical and electrical branch cable is connected to the optical and electrical branch cable equipment-end connector, and the other end is connected to the optical and electrical branch cable submarine cable-end connector. The compression sleeve is installed at the connection of the optical and electrical branch cable equipment-end connector and one end of the optical and electrical branch cable; the rubber protection cover and the rubber protection sleeve are sleeved on the periphery of the optical and electrical branch cable, and the rubber protection cover and the rubber protection sleeve are allowed to slide relative to the optical and electrical branch cable; a plurality of the optical and electrical branch cable submarine cable-end connectors are fixedly connected to one end of the branch box by screws, and the other end of the branch box is connected to the submarine cable. This application solves the problems of underwater anti-collision, shaking, bending, wear, hooking, and marine organism attachment of the transmission cable.

Description

Technical Field

[0001] The present invention relates to the field of marine transmission cable protection, and more specifically, to an underwater transmission cable anti-collision structure and installation method. In particular, it relates to a device and method for protecting transmission cables of underwater electronic equipment with multiple extensions and multiple cables from underwater collision, shaking, bending, abrasion, snagging, and marine organism adhesion. Background Art

[0002] Transmission cables for offshore projects are typically laid on the seabed, typically protected by trenching, riprap, and casing. In areas with high current velocities and complex topography, specialized scour protection devices are also required to meet the requirements for submarine cable protection. For underwater electronic equipment, the interconnecting optical and electrical branch cables between each branch are installed with the equipment on a steel pile platform and suspended in the seawater, typically tens of meters above the seabed and surface. Fish and marine life tend to gather in the gaps between the equipment. This not only causes marine life to foul the equipment and transmission cables, making subsequent repairs difficult, but also exposes the cable connectors to vibrations, such as from large fish impacting them, leading to connection failure. The submarine cables that connect the equipment to shore for power and communication travel tens of meters from the steel platform to the seabed. Due to their relatively large diameter and mass, the cables are prone to bending and shaking under the forces of gravity and currents. This can lead to at least abrasion of the cable sheath and, in severe cases, failure of the cable-equipment connection, causing equipment to cease operation. Suspended submarine cables are also susceptible to external forces such as anchoring ships and fishing trawling, significantly increasing the risk of damage. Therefore, transmission cables must be properly protected to minimize vibration, bending, abrasion, and snags. Furthermore, marine organisms must be prevented from attaching to cables, making subsequent maintenance easier and more efficient. Due to the unique nature of the equipment's installation location, traditional submarine cable protection methods are not suitable for cables suspended in seawater.

[0003] In addition, there are existing patents such as "Underwater Cable Protection Device (201220750315.4)" and "A Submarine Cable Protection Device (202014100806.5)", and a small number of documents involving submarine cable anti-scour protection devices and analysis, such as "A Design of a New Submarine Cable Anti-scour Protection Device", but the above content is quite different from the targetedness and technical approach of the patent of this invention. Summary of the Invention

[0004] In view of the defects in the prior art, the purpose of the present invention is to provide an underwater transmission cable anti-collision structure and installation method.

[0005] According to the present invention, there are provided an underwater transmission cable anti-collision structure, a photoelectric branch cable protection structure and a submarine cable protection structure;

[0006] The protection structure of the optical and electrical branched cable includes: an optical and electrical branched cable, an equipment-end connector of the optical and electrical branched cable, a submarine cable-end connector of the optical and electrical branched cable, a compression nut, a rubber protective cover, and a rubber protective sleeve;

[0007] One end of the optical and electrical branched cable is connected to the equipment-end connector of the optical and electrical branched cable, and the other end is connected to the submarine cable-end connector of the optical and electrical branched cable. A compression nut is installed at the connection of the equipment-end connector of the optical and electrical branched cable and one end of the optical and electrical branched cable;

[0008] The rubber protective cover and the rubber protective sleeve are sleeved on the periphery of the optical and electrical branched cable, and the rubber protective cover and the rubber protective sleeve are allowed to slide relative to the optical and electrical branched cable;

[0009] A plurality of submarine cable-end connectors of the optical and electrical branched cable are fixedly connected to one end of the branch box by screws, and the other end of the branch box is connected to the submarine cable.

[0010] Preferably, the equipment-end connector of the optical and electrical branched cable is allowed to be embedded in the sub-machine cabin and connected to the optical and electrical connector inside the sub-machine cabin;

[0011] When the equipment-end connector of the optical and electrical branched cable is allowed to be embedded in the sub-machine cabin, the compression nut is installed on the sub-machine cabin. Silicone is applied to the side of the compression nut facing away from the equipment-end connector of the optical and electrical branched cable, and the rubber protective cover slides and is installed on the compression nut.

[0012] Preferably, when the submarine cable-end connector of the optical and electrical branched cable is fixedly connected to the branch box, the rubber protective sleeve moves and is installed at the end of the submarine cable-end connector of the optical and electrical branched cable connected to the branch box. The rubber protective sleeve covers the outside of the screw, and a watertight tape is covered at the end of the rubber protective sleeve facing away from the branch box;

[0013] The optical and electrical branched cables connected by a plurality of submarine cable-end connectors of the optical and electrical branched cable are wrapped into a bundle by an end band.

[0014] Preferably, an anti-collision bracket is installed on the periphery of the submarine cable-end connector of the optical and electrical branched cable.

[0015] Preferably, the submarine cable protection structure includes: underwater equipment, a transfer platform, and a steel pile platform;

[0016] The transfer platform is installed on the steel pile platform, and the underwater equipment is installed on the side of the transfer platform facing away from the steel pile platform;

[0017] A plurality of branch box fixing seats are installed on the transfer platform, and the branch box is installed on the transfer platform through the branch box fixing seats.

[0018] Preferably, a plurality of the submarine cables extend from the cable outlet of the transfer platform. An arc-shaped cable anti-bending bracket is installed at the cable outlet of the transfer platform. A cable fixing seat is installed between the cable anti-bending bracket and the branch box fixing seat. The cable fixing seat clamps one end of the cable close to the branch box. A plurality of the cables are fixedly connected in parallel by a cable fixing clip on the side of the cable anti-bending bracket facing away from the branch box.

[0019] Preferably, the steel pile platform includes: a platform surface, steel pipe piles, and steel pile support members;

[0020] One end of the steel pipe pile is connected to one side of the platform surface, the transfer platform is installed on the other side of the platform surface, and both ends of the steel pile support member are respectively connected to and support the platform surface and the steel pipe pile;

[0021] A circular cable protection member is fixedly installed at the cable outlet at the edge of the platform surface. The cable protection member supports the cable and prevents the cable from contacting the edge of the platform surface. One end of a steel wire rope is connected to the steel pile support member, and the other end is connected to the cable. The cable is pulled towards the cable protection member by the steel wire rope.

[0022] Preferably, one or more pile climbing fixing members are fixedly installed on the steel pipe pile, and the cable is fixedly installed on the steel pipe pile through the pile climbing fixing members;

[0023] The pile climbing fixing member includes: a welding member and a pressing member;

[0024] The welding member is fixedly installed on the steel pipe pile. The pressing member is fixedly connected to the welding member through a fastener. Grooves are provided on the welding member and the pressing member. The grooves on the welding member and the pressing member enclose a fixing clip groove. Rubber plates are bonded to the grooves on the welding member and the pressing member. The cable is fixedly installed in the fixing clip groove;

[0025] One end of the cable away from the transfer platform is fixedly coiled around a cable coiling pile.

[0026] The present invention also provides an installation method for an underwater transmission cable anti-collision structure, including: an optical and electrical branch cable, an optical and electrical branch cable equipment end connector, an optical and electrical branch cable submarine cable end connector, a sub-machine cabin body, an anti-collision bracket, and a submarine cable;

[0027] The processing steps include:

[0028] Step S1, pre-coating treatment is performed on the surface of the optical and electrical branch cable;

[0029] Step S2, surface coating treatment is performed on the optical and electrical branch cable at the construction site;

[0030] Step S3: Install the optoelectronic branch cable equipment end on the sub-machine cabin and connect it to the sub-machine cabin through the optoelectronic branch cable equipment end connector.

[0031] Step S4: Wrap multiple optoelectronic branch cables into a bundle with an end tape.

[0032] Step S5: Fix and install the submarine cable and the branch box on the transfer platform.

[0033] Step S6: Connect the optoelectronic branch cable and the submarine cable.

[0034] Step S7: Install an anti-collision bracket on the submarine cable end connector of the optoelectronic branch cable.

[0035] Step S8: Fix and install the submarine cable protection structure.

[0036] Step S9: Fix and install the submarine cable on the submarine cable protection structure,

[0037] Step S10: Conduct underwater video inspection.

[0038] Preferably, in step S, the specific steps of the pre-coating treatment are as follows:

[0039] Step N1: Repeatedly polish the rubber surface of the optoelectronic branch cable with sandpaper until the outer surface becomes rough.

[0040] Step N2: Use a cleaning agent to remove the residual oil and dust on the surface of the optoelectronic branch cable.

[0041] Step N3: Select a hard brush, soak it with anti-fouling paint, and brush the rubber surface of the optoelectronic branch cable in a single direction multiple times.

[0042] Step N4: After the pre-coating is completed, send it to the construction site.

[0043] The specific steps of the surface coating treatment at the construction site are as follows:

[0044] Step M1: Before coating, polish and roughen the original anti-fouling paint on the surface of the optoelectronic branch cable and clean the surface floating dust.

[0045] Step M2: Re-brush anti-fouling paint on the surface of the optoelectronic branch cable.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] 1. Through the design of protection structures such as the submarine cable anti-bending bracket, rubber protection sleeve, pile climbing fixing piece, anti-collision bracket, submarine cable fixing seat, and submarine cable protection member, the present application solves the problems of underwater anti-impact, shaking, bending, wear, and hooking of transmission cables, and solves the problem of sea creature attachment by installing a rubber protection cover and regularizing the submarine cable to reduce contact with sea creatures.

[0048] 2. Most of the assembly of the anti-collision structure of the underwater transmission cable in this application can be completed on the shore end or the construction mother ship, reducing the difficulty of underwater work for divers and facilitating maintenance;

[0049] 3. By providing reliable fixation and protection for the cable connector part in this application, the working reliability of the equipment is improved;

[0050] 4. By providing reliable anti-fouling protection for the cable connector disassembly and assembly components and the cable surface in this application, the difficulty of disassembly and assembly during later maintenance is reduced, and the maintenance efficiency is improved;

[0051] 5. This application can provide good protection for submarine cables at the same time, reducing the risk of external force damage such as fluid scouring, ship anchoring, and fishing net dragging;

[0052] 6. By protecting the equipment in this application, the probability of equipment failure is reduced, the service life of the equipment is extended, the maintenance frequency is reduced, and economic costs are saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Other features, objects, and advantages of the present invention will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0054] Figure 1 is a schematic structural diagram of the anti-collision structure of the underwater transmission cable;

[0055] Figure 2 is a schematic structural diagram of the connection of the equipment end connector of the optical and electrical branch cable to the sub-compartment body;

[0056] Figure 3 is a schematic structural diagram of the submarine cable end connector of the optical and electrical branch cable;

[0057] Figure 4 is a schematic diagram of the end tape covering the optical and electrical branch cable;

[0058] Figure 5 is a schematic structural diagram of the submarine cable protection structure;

[0059] Figure 6 is a top view of the submarine cable fixed installation;

[0060] Figure 7 is a schematic structural diagram of the pile climbing fixing piece;

[0061] Figure 8 is a flow chart of the submarine cable installation method;

[0062] As shown in the figure:

[0063] DETAILED DESCRIPTION OF THE EMBODIMENTS

[0064] The present invention will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those of ordinary skill in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0065] Embodiment 1

[0066] As Figures 5 to 7 shown, this embodiment includes: an optical and electrical branch cable protection structure and a submarine cable protection structure;

[0067] The submarine cable protection structure includes: an underwater device 1, a transfer platform 2, and a steel pile platform 3; the transfer platform 2 is installed on the steel pile platform 3, the underwater device 1 is installed on the transfer platform 2, a plurality of branch box fixing seats 15 are installed on the transfer platform 2, and the branch box 13 is installed on the transfer platform 2 through the branch box fixing seats 15. A plurality of submarine cables 16 extend from the cable outlet of the transfer platform 2 out of the transfer platform 2. An arc-shaped submarine cable anti-bending bracket 17 is installed at the cable outlet of the transfer platform 2. A submarine cable fixing seat 18 is installed between the submarine cable anti-bending bracket 17 and the branch box fixing seat 15. The submarine cable fixing seat 18 clamps one end of the submarine cable 16 close to the branch box 13. On the side of the submarine cable anti-bending bracket 17 facing away from the branch box 13, a plurality of submarine cables 16 are fixedly connected in parallel through a submarine cable fixing clip 19. The steel pile platform 3 includes: a platform surface, steel pipe piles, and steel pile support members; one end of the steel pipe pile is connected to one side of the platform surface, the transfer platform 2 is installed on the other side of the platform surface, and both ends of the steel pile support members are respectively connected to and support the platform surface and the steel pipe piles. A circular submarine cable protection member 20 is fixedly installed at the cable outlet on the edge of the platform surface. The submarine cable protection member 20 supports the submarine cable 16 and prevents the submarine cable 16 from contacting the edge of the platform surface. One end of a steel wire rope 22 is connected to the steel pile support member, and the other end is connected to the submarine cable 16. The submarine cable 16 is pulled towards the submarine cable protection member 20 through the steel wire rope 22. One or more pile climbing fixing members 21 are fixedly installed on the steel pipe piles. The submarine cable 16 is fixedly installed on the steel pipe piles through the pile climbing fixing members 21. The pile climbing fixing members 21 include: a welding member 25 and a pressing member 26. The welding member 25 is fixedly installed on the steel pipe pile. The pressing member 26 is fixedly connected to the welding member 25 through a fastener 27. Grooves are provided on the welding member 25 and the pressing member 26. The grooves on the welding member 25 and the pressing member 26 enclose a fixing clip groove. Rubber plates 24 are bonded to the grooves on the welding member 25 and the pressing member 26. The submarine cable 16 is fixedly installed in the fixing clip groove. The end of the submarine cable 16 away from the transfer platform 2 is fixedly coiled around a cable coiling pile 23.

[0068] As Figures 1 to 4As shown in the figure, the protection structure of the optical and electrical branch cable includes: an optical and electrical branch cable 4, an optical and electrical branch cable equipment end connector 5, an optical and electrical branch cable submarine cable end connector 6, a compression sleeve 7, a rubber protection cover 8, and a rubber protection sleeve 9; one end of the optical and electrical branch cable 4 is connected to the optical and electrical branch cable equipment end connector 5, and the other end is connected to the optical and electrical branch cable submarine cable end connector 6. An anti-collision bracket 14 is installed on the periphery of the optical and electrical branch cable submarine cable end connector 6. A compression sleeve 7 is installed at one end of the optical and electrical branch cable 4 connected to the optical and electrical branch cable equipment end connector 5. A rubber protection cover 8 and a rubber protection sleeve 9 are sleeved on the periphery of the optical and electrical branch cable 4, and the rubber protection cover 8 and the rubber protection sleeve 9 are allowed to slide relative to the optical and electrical branch cable 4; the optical and electrical branch cable equipment end connector 5 is allowed to be embedded in the sub-machine cabin 10 and connected to the optical and electrical connector 11 inside the sub-machine cabin 10. When the optical and electrical branch cable equipment end connector 5 is allowed to be embedded in the sub-machine cabin 10, the compression sleeve 7 is installed on the sub-machine cabin 10, silicone is applied to the side of the compression sleeve 7 facing away from the optical and electrical branch cable equipment end connector 5, and the rubber protection cover 8 slides and is installed on the compression sleeve 7. A plurality of optical and electrical branch cable submarine cable end connectors 6 are fixedly connected to one end of the branch box 13 by screws, and the other end of the branch box 13 is connected to the submarine cable 16. When the optical and electrical branch cable submarine cable end connector 6 is fixedly connected to the branch box 13, the rubber protection sleeve 9 moves and is installed at one end of the optical and electrical branch cable submarine cable end connector 6 connected to the branch box 13. The rubber protection sleeve 9 covers the outside of the screw, and a watertight tape is covered at one end of the rubber protection sleeve 9 facing away from the branch box 13. The optical and electrical branch cables 4 connected by a plurality of optical and electrical branch cable submarine cable end connectors 6 are wrapped into a bundle by an end tape 12.

[0069] As Figure 8As shown in the figure, the installation method of this embodiment includes: Step S1, pre-coating treatment is carried out on the surface of the optical and electrical branch cable 4; the specific steps of the pre-coating treatment are as follows: 1. Repeatedly polish the rubber surface of the optical and electrical branch cable 4 with sandpaper until the outer surface becomes rough; 2. Use a cleaning agent to remove the residual oil stains and floating dust on the surface of the optical and electrical branch cable 4; 3. Select a hard brush, soak it with anti-fouling paint, and brush it on the rubber surface of the optical and electrical branch cable in a single direction for multiple times; 4. After the pre-coating is completed, it is sent to the construction site. The specific steps of the surface coating treatment at the construction site are as follows: 1. Before coating, polish and roughen the original anti-fouling paint on the surface of the optical and electrical branch cable 4 and clean the floating dust on the surface; 2. Re-brush anti-fouling paint on the surface of the optical and electrical branch cable 4. Step S2, the surface of the optical and electrical branch cable 4 is subjected to surface coating treatment at the construction site; Step S3, the equipment end of the optical and electrical branch cable 4 is installed and connected to the sub-machine cabin body 10 through the optical and electrical branch cable equipment end connector 5; Step S4, multiple optical and electrical branch cables 4 are wrapped into a bundle by an end band 12; Step S5, the submarine cable 16 and the branch box 13 are fixedly installed on the transfer platform 2; Step S6, the optical and electrical branch cable 4 and the submarine cable 16 are docked; Step S7, an anti-collision bracket 14 is installed on the optical and electrical branch cable submarine cable end connector 6; Step S8, the submarine cable protection structure is fixedly installed; Step S9, the submarine cable 16 is fixedly installed on the submarine cable protection structure; Step S10, underwater video inspection is carried out.

[0070] Embodiment 2

[0071] Embodiment 2 is a preferred example of Embodiment 1.

[0072] Surface treatment method of the optical and electrical branch cable 4: Repeatedly polish the rubber surface of the optical and electrical branch cable 4 with sandpaper until the outer surface becomes rough, use a cleaning agent to remove the residual oil stains and floating dust on the equipment surface, select a hard brush, soak it with anti-fouling paint, and carry out multiple brushings in a single direction, and keep the smoothness and uniformity of the paint film. After the pre-coating is completed, it is sent to the construction site together with the underwater equipment 1, and the on-site coating time is reasonably selected according to the equipment laying time. Before coating, the original anti-fouling paint on the surface should be polished and roughened and the floating dust on the surface should be cleaned, and anti-fouling paint should be re-brushed.

[0073] As Figures 1 to 4 As shown in the figure, after connecting the optical and electrical branch cable equipment end connector 5 to the internal optical connector 11 of the sub-machine cabin body 10, use a compression sleeve 7 to embed the optical and electrical branch cable equipment end connector 5 entirely into the sub-machine cabin body 10. Apply an appropriate amount of silicone on the outer surface of the compression sleeve 7, and use a rubber protection cover 8 to seal the gap of the compression sleeve 7 to prevent underwater marine organisms from blocking the disassembly and assembly holes of the compression sleeve 7.

[0074] After the multi-extension optical fiber branch cable 4 is installed at the equipment end, the multiple optical fiber branch cables 4 connected to the same submarine cable 16 are bundled together using a wrapping tape 12 and then delivered to the branch box 13 at the end of the submarine cable 16. Due to the limited space inside the branch box 13, the optical fiber branch cable connector 6 is secured with screws. After the screws are installed, the rubber protective cover 9 is slid to the rightmost end. The rubber protective cover 9 slides into the internal holes and tightly covers the screws. After the rubber protective cover 9 is in place, the end of the rubber protective cover 9 is wrapped with watertight tape to prevent it from sliding and to prevent marine organisms from attaching to the tightening screws. Finally, the anti-collision bracket 14 is installed to prevent large fish from colliding with the optical fiber branch cable connector 6 and divers from accidentally stepping on it during underwater operations.

[0075] like Figures 5 to 7 As shown, the branch box 13 is first installed in the branch box fixing seat 15 on the transfer platform 2. A curved submarine cable anti-folding bracket 17 is provided at the cable outlet of the transfer platform 2 (the position where the submarine cable 16 extends out). A submarine cable fixing seat 18 is placed between the branch box fixing seat 15 and the submarine cable anti-folding bracket 17. The connection between the submarine cable 16 and the equipment is protected by clamping and fixing. The rear end of the optical / electrical branch cable submarine cable end connector 6 uses a submarine cable fixing clamp 19 to fix the two submarine cables 16 in parallel to avoid entanglement; a circular submarine cable protection component 20 is welded at the cable outlet of the steel pile platform 3 to prevent the submarine cable 16 from repeated friction and wear with the edge of the steel pile platform 3 under the action of fluid force.

[0076] After divers securely connect underwater equipment 1 to steel pile platform 3, they use steel wire ropes 22 to diagonally secure submarine cable 16 below the platform to the steel pile support structure, limiting cable 16's movement and reducing wear. Cable 16 is also secured along the steel pipe piles using pile mounting fixtures 21. Excess cable 16 on the seabed is coiled around cable bollards 23 as much as possible to minimize damage from external forces such as anchoring ships and fishing trawls. After completing the underwater operation, divers inspect and videotape the final status of submarine cable 16 and optoelectronic branch cable 4.

[0077] The pile mounting fixture 21 consists of a welding member 25 and a holding member 26. These members are first securely bonded to a rubber sheet 24 on the shore using strong adhesive. Divers then weld the welding members 25 to the steel piles, sequentially from top to bottom, at appropriate intervals (2-3 meters). To secure the submarine cables 16, two cables are placed sequentially in the fixture grooves formed between the welding member 25 and the holding member 26. The holding member 26 is then secured in place using fasteners 27 to prevent movement of the cables 16.

[0078] Example 3

[0079] This embodiment can be divided into the design of the protective structure of the photoelectric branch cable and the design of the protective structure of the submarine cable. In terms of the design of the protective structure of the photoelectric branch cable, one end of the photoelectric branch cable 4 is connected to the equipment sub-cabin 10, and the other end is connected to the terminal branch box 13 of the submarine cable 16. The plug of the photoelectric branch cable equipment end connector 5 is completely inserted into the sub-cabin 10 and is multiple-sealed with the sub-cabin 10. Only the vulcanized part of the tail of the photoelectric branch cable equipment end connector 5 protrudes from the sub-cabin 10 and is fixedly connected to the equipment sub-cabin 10 by a compression screw sleeve 7. A rubber protective cover 8 is set on the top of the compression screw sleeve 7 to prevent marine organisms from clogging the screw sleeve disassembly hole.

[0080] Due to the limited space of the branch box 13 and the connection of multiple optoelectronic branch cables 4, it can only be fixed to the branch box 13 by screw fastening. In terms of the design of the submarine cable protection structure, a cylindrical submarine cable anti-folding bracket 17 is provided at the cable outlet of the transfer platform 2. A submarine cable fixing seat 18 is placed between the branch box fixing seat 15 and the submarine cable anti-folding bracket 17. The connection between the submarine cable 16 and the equipment is protected by clamping and fixing. The rear end of the submarine cable anti-folding bracket 17 uses a submarine cable fixing clamp 19 to fix the two submarine cables 16 in parallel to avoid entanglement. At the same time, a cylindrical submarine cable protection member 20 is provided at the cable outlet of the steel pile platform 3 to prevent the submarine cable 16 from bending at right angles at the edge of the steel pile platform 3 due to its own weight during deployment and from repeated friction and wear with the steel pile platform 3 under the action of ocean currents. The steel pile body is provided with a pile fixing member 21, and the contact surface with the submarine cable 16 is firmly bonded with a rubber sheet 24, which fixes the submarine cable 16 along the pile body until it reaches the mud surface, thereby reducing the possibility of fishing trawls dragging the submarine cable.

[0081] In terms of coating and installation construction technology, since the photovoltaic branch cable 4 will be salvaged and maintained later along with the equipment, marine organisms such as oysters and barnacles may be attached to the surface of the photovoltaic branch cable 4, seriously affecting the personal safety of maintenance personnel and the convenience of operation. Therefore, a surface antifouling coating process is proposed, which includes pre-coating before equipment shipment and coating at the construction site. Pre-coating before equipment shipment requires repeatedly sanding the rubber surface of the photovoltaic branch cable 4 with sandpaper until the outer surface becomes rough. Use a cleaning agent to remove residual oil and dust on the surface of the equipment. Select a hard brush, soak it in antifouling paint, and apply it multiple times in a single direction, while maintaining the flatness and uniformity of the paint film. Because the surface of the antifouling paint is prone to gradual failure in the air, it needs to be immersed in water for a certain period of time to maintain the best protective effect. Therefore, the construction site should reasonably carry out on-site coating according to the actual time the underwater equipment is immersed in water. Before coating, the original antifouling paint on the surface should be sanded and roughened, and the surface should be cleaned of floating debris.

[0082] On the other hand, since there are many photoelectric branch cables 4 between the equipment branches, in order to ensure that the photoelectric branch cables 4 are distributed neatly and regularly, facilitate maintenance and retrieval, and reduce direct contact with marine organisms, multiple photoelectric branch cables 4 are bundled together using end bands 12 and cable ties to protect and secure them. In addition, silicone is applied to the surface of the compression screw sleeve 7 to fill the gap between it and the rubber protective cover 8 to prevent clogging by marine organisms; after the rubber protective cover 9 is installed in place, watertight tape is wrapped around the tail to prevent the rubber protective cover 9 from sliding. After the divers weld the submarine cable protection components 20 and the pile mounting fixtures 21 underwater, the submarine cable 16 is fixed along the steel piles in sequence. The steel pile platform 3 under the submarine cable 16 is connected to the steel pile support component with an inclined steel wire rope 22 to limit the movement space of the submarine cable 16 and reduce the possibility of wear. Excess submarine cables 16 on the seabed are coiled as much as possible near the cable winding pile 23. After the divers complete the underwater operation, the cable status needs to be inspected and recorded.

[0083] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0084] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. An anti-collision structure for an underwater transmission cable, characterized in that, Comprising: Optical and electrical branch cable protection structure and submarine cable protection structure; The optical and electrical branch cable protection structure includes: an optical and electrical branch cable (4), an optical and electrical branch cable equipment end connector (5), an optical and electrical branch cable submarine cable end connector (6), a compression sleeve (7), a rubber protection cover (8), and a rubber protection sleeve (9); One end of the optical and electrical branch cable (4) is connected to the optical and electrical branch cable equipment end connector (5), and the other end is connected to the optical and electrical branch cable submarine cable end connector (6). A compression sleeve (7) is installed at the connection of the optical and electrical branch cable equipment end connector (5) and one end of the optical and electrical branch cable (4); The rubber protection cover (8) and the rubber protection sleeve (9) are sleeved on the periphery of the optical and electrical branch cable (4), and the rubber protection cover (8) and the rubber protection sleeve (9) are allowed to slide relative to the optical and electrical branch cable (4); A plurality of the optical and electrical branch cable submarine cable end connectors (6) are fixedly connected to one end of a branch box (13) by screws. The other end of the branch box (13) is connected to a submarine cable (16), and the branch box (13) is installed on the submarine cable protection structure; The submarine cable protection structure includes: an underwater device (1), a transfer platform (2), and a steel pile platform (3); The transfer platform (2) is installed on the steel pile platform (3), and the underwater device (1) is installed on the side of the transfer platform (2) facing away from the steel pile platform (3); A plurality of branch box fixing seats (15) are installed on the transfer platform (2), and the branch box (13) is installed on the transfer platform (2) through the branch box fixing seats (15); A plurality of the submarine cables (16) extend out of the transfer platform (2) from the cable outlet of the transfer platform (2). An arc-shaped submarine cable anti-bending bracket (17) is installed at the cable outlet of the transfer platform (2). A submarine cable fixing seat (18) is installed between the submarine cable anti-bending bracket (17) and the branch box fixing seat (15). The submarine cable fixing seat (18) clamps one end of the submarine cable (16) close to the branch box (13). A plurality of the submarine cables (16) are fixedly connected in parallel on the side of the submarine cable anti-bending bracket (17) facing away from the branch box (13) through a submarine cable fixing clip (19).

2. The underwater transmission cable anti-collision structure according to claim 1, characterized in that: The optical and electrical branch cable equipment end connector (5) is allowed to be embedded in the sub-machine cabin body (10) and connected to the optical and electrical connector (11) inside the sub-machine cabin body (10); When the optical and electrical branch cable equipment end connector (5) is allowed to be embedded in the sub-machine cabin body (10), the compression sleeve (7) is installed on the sub-machine cabin body (10). Silicone is applied to the side of the compression sleeve (7) facing away from the optical and electrical branch cable equipment end connector (5), and the rubber protection cover (8) slides and is installed on the compression sleeve (7).

3. The underwater transmission cable anti-collision structure according to claim 1, wherein: When the optical and electrical branch cable submarine cable end connector (6) is fixedly connected to the branch box (13), the rubber protection sleeve (9) moves and is installed at one end of the optical and electrical branch cable submarine cable end connector (6) connected to the branch box (13). The rubber protection sleeve (9) covers the outside of the screw, and a watertight tape is covered at one end of the rubber protection sleeve (9) facing away from the branch box (13); The optical and electrical branched cable (4) connected by multiple optical and electrical branched cable submarine cable end connectors (6) is wrapped into a bundle by an end tape (12).

4. The underwater transmission cable anti-collision structure according to claim 1, wherein: An anti-collision bracket (14) is installed on the periphery of the optical and electrical branched cable submarine cable end connector (6).

5. The underwater transmission cable anti-collision structure according to claim 1, characterized in that, The steel pile platform (3) includes: a platform surface, steel pipe piles, and steel pile support members; One end of the steel pipe pile is connected to one side of the platform surface, the transfer platform (2) is installed on the other side of the platform surface, and both ends of the steel pile support member are respectively connected to and support the platform surface and the steel pipe pile; A circular submarine cable protection member (20) is fixedly installed at the cable outlet on the edge of the platform surface. The submarine cable protection member (20) supports the submarine cable (16) and prevents the submarine cable (16) from contacting the edge of the platform surface. One end of a steel wire rope (22) is connected to the steel pile support member, and the other end is connected to the submarine cable (16). The submarine cable (16) is pulled towards the submarine cable protection member (20) by the steel wire rope (22).

6. The underwater transmission cable anti-collision structure according to claim 5, characterized in that: One or more pile climbing fixing members (21) are fixedly installed on the steel pipe pile, and the submarine cable (16) is fixedly installed on the steel pipe pile through the pile climbing fixing members (21); The pile climbing fixing member (21) includes: a welding member (25) and a pressing member (26); The welding member (25) is fixedly installed on the steel pipe pile. The pressing member (26) is fixedly connected to the welding member (25) through a fastener (27). Grooves are provided on the welding member (25) and the pressing member (26). The groove of the welding member (25) and the groove of the pressing member (26) enclose a fixing member clamping groove. Rubber plates (24) are bonded to the grooves of the welding member (25) and the pressing member (26). The submarine cable (16) is fixedly installed in the fixing member clamping groove; One end of the submarine cable (16) far from the transfer platform (2) is fixedly coiled on a cable coiling pile (23).

7. An installation method for the anti-collision structure of the underwater transmission cable described in claim 1, characterized in that Including: Optical and electrical branched cable (4), optical and electrical branched cable equipment end connector (5), optical and electrical branched cable submarine cable end connector (6), sub-machine cabin body (10), anti-collision bracket (14), and submarine cable (16); The processing steps include: Step S1, pre-coating treatment is performed on the surface of the optical and electrical branched cable (4); Step S2, surface coating treatment is performed on the optical and electrical branched cable (4) at the construction site; Step S3, the equipment end of the optical and electrical branched cable (4) is installed and connected to the sub-machine cabin body (10) through the optical and electrical branched cable equipment end connector (5); Step S4, multiple optical and electrical branched cables (4) are coated into a bundle by an end tape (12); Step S5, the submarine cable (16) and the branch box (13) are fixedly installed on the transfer platform (2); Step S6, the optical and electrical branched cable (4) and the submarine cable (16) are docked; Step S7, an anti-collision bracket (14) is installed on the optical and electrical branched cable submarine cable end connector (6); Step S8, a submarine cable protection structure is fixedly installed; Step S9, the submarine cable (16) is fixedly installed on the submarine cable protection structure; Step S10, underwater video inspection is performed.

8. The installation method of the underwater transmission cable anti-collision structure according to claim 7, characterized in that: In step S1, the specific steps of the pre-coating treatment are: Step N1: Repeatedly polish the rubber surface of the optical and electrical branch cable (4) with sandpaper until the outer surface becomes rough. Step N2: Use a cleaning agent to remove the residual oil stains and floating dust on the surface of the optical and electrical branch cable (4). Step N3: Select a hard brush, soak it with anti-fouling paint, and brush the rubber surface of the optical and electrical branch cable (4) multiple times in a single direction. Step N4: After pre-coating, send it to the construction site. The specific steps for surface coating treatment at the construction site are as follows: Step M1: Before coating, polish and roughen the original anti-fouling paint on the surface of the optical and electrical branch cable (4) and clean the surface floating dust. Step M2: Re-brush anti-fouling paint on the surface of the optical and electrical branch cable (4).

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