Offshore wind power cable installation fixing detection and maintenance device and method

Abstract

The application belongs to the technical field of submarine cable installation, and particularly relates to a kind of offshore wind power submarine cable installation, fixing, detection and maintenance equipment and method. It comprises left receiving frame, right receiving frame, left fixed frame and right fixed frame, the left receiving frame and right receiving frame are slidingly inserted, the left fixed frame and right fixed frame are slidingly inserted, the left receiving frame and right receiving frame are located at the bottom of the submarine cable, the left fixed frame and right fixed frame are located at the top of the submarine cable, and the submarine cable is limited together, the left receiving frame and left fixed frame are fixed and installed by bolts, the right receiving frame and right fixed frame are fixed and installed by bolts, the submarine cable can be effectively protected from being torn by external force when being taken out of the sea, and the damaged submarine cable can be conveniently welded and repaired without additional disassembly and fixing operation, the bidirectional screw rod can be positioned to prevent accidental rotation, and the submarine cable can be quickly protected after maintenance.

Description

Technical Field

[0001] This invention belongs to the field of submarine cable installation technology, specifically relating to an installation, fixing, testing, and maintenance device and method for offshore wind power submarine cables. Background Technology

[0002] Submarine wind power cables are submarine cables specifically designed for transmitting electricity between offshore wind farms and the mainland in wind power projects. They transmit the electricity generated by offshore wind farms to the onshore power grid, enabling grid-connected wind power generation. Submarine wind power cables are waterproof, corrosion-resistant, and resistant to electromagnetic interference, allowing them to withstand the harsh conditions of the seabed environment and ensuring stable and safe power transmission. However, submarine wind power cables are susceptible to damage in the seabed environment, primarily due to seabed friction, current erosion, marine life damage, and occasional dragging by ship anchor chains. These external pressures can cause wear or breakage of the cable's outer sheath, thus affecting power transmission.

[0003] Chinese Patent Application No. 202411223692.6 discloses a center positioning protection device for submarine cable laying, including a J-shaped tube. The lower end of the J-shaped tube is connected to a docking protection device. The docking protection device includes sliding blocks arranged in a ring at equal intervals. A first sliding groove and a second sliding groove are respectively opened on both sides of the sliding blocks. The first sliding groove and the second sliding groove are fixedly connected to a locking block. This effectively solves the problem that existing submarine cable center positioning protection devices consist of two symmetrically arranged positioning components, which are composed of a first semi-circular straight cylinder and a second semi-circular straight cylinder. During use, multiple screws and nuts are used to ensure that the clamp can be tightly fixed around the submarine cable, preventing displacement of the submarine cable during movement or use. However, this method is relatively cumbersome to install the submarine cable bending protection at the lower end of the J-shaped tube, and it will cause technical problems of low disassembly efficiency during subsequent long-term use of the equipment.

[0004] When a wind power submarine cable is partially damaged, emergency repairs and power restoration are required. This is usually done by using a repair vessel to lift the damaged section of the cable out of the water for repairs. However, because damaged cables are very easy to break by external forces, it is not possible to lift the cable out quickly. In addition, the repair process after lifting the cable out often requires complex installation and fixing equipment, which is troublesome. After the repair is completed, a tedious disassembly and repositioning operation is required. Furthermore, the cable may be damaged again during repositioning because the repaired part is not very secure. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an installation, fixing, inspection, and maintenance device for offshore wind power cables. Through the cooperation of a left receiving frame, a right receiving frame, a left fixing frame, and a right fixing frame, and the adjustment of a bidirectional screw, this invention effectively protects the cable from being torn apart by external forces when it is lifted out of the sea. It also facilitates welding repair of damaged sections of the cable without additional disassembly and fixing operations. Furthermore, the lower limit mechanism not only assists in limiting the bidirectional screw to prevent accidental rotation but also provides rapid auxiliary protection for the cable after maintenance, preventing fatigue wear and damage at the fixing joints.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An installation, fixing, inspection, and maintenance device for offshore wind power submarine cables includes a left receiving frame, a right receiving frame, a left fixing frame, and a right fixing frame. The left receiving frame and the right receiving frame are slidably connected; the left fixing frame and the right fixing frame are also slidably connected; the left and right receiving frames are located at the bottom of the submarine cable, and the left and right fixing frames are located at the top of the submarine cable, jointly limiting the cable's position; the left receiving frame and the left fixing frame are fixedly installed with bolts; the right receiving frame and the right fixing frame are also fixedly installed with bolts.

[0008] The top openings of the left and right fixed frames; the bottom openings of the left and right receiving frames are both threaded and connected to a bidirectional screw.

[0009] Furthermore, the left receiving frame includes a first frame body, on the side of the first frame body away from the right receiving frame, a first semicircular groove and a first fixing plate are fixedly connected; the right receiving frame includes a second frame body, on the side of the second frame body away from the left receiving frame, a second semicircular groove and a second fixing plate are fixedly connected; a first insertion groove is provided on the side of the second frame body near the left receiving frame and the first insertion groove is inserted into the first frame body; submarine cables are built into the first semicircular groove and the second semicircular groove.

[0010] Furthermore, the bidirectional screw includes a bidirectional screw body with opposite thread directions at the left and right ends, and the ends of the bidirectional screw body are fixedly connected to control knobs via support shafts.

[0011] Furthermore, the bottom of both the first and second semicircular grooves is provided with a first sliding groove, and the sidewalls of both the first and second semicircular grooves are provided with a first telescopic groove, which is connected to the first sliding groove. Both ends of the bidirectional screw are provided with a lower limiting mechanism, which includes a limiting ring sleeved on the bidirectional screw. The top of the limiting ring is fixedly connected to an elastic curved panel through a connecting rod, and the elastic curved panel is located in the corresponding first telescopic groove. Limiting plates are fixedly connected to both sides of the limiting ring, and spring grooves are provided on the limiting plates. A first sliding rod is slidably connected to the spring grooves. A limiting protrusion and a limiting block are fixedly connected to both ends of the first sliding rod, and the side of the limiting block near the bidirectional screw is a curved surface structure. A limiting spring is sleeved on the first sliding rod.

[0012] Furthermore, sliding holes are provided on both sides of the threaded opening of the left and right receiving frames, and a second sliding rod is slidably connected to the sliding holes; one end of the sliding rod is fixedly connected to the corresponding limiting plate, and the other end is fixedly connected to the second limiting protrusion, and a return spring is sleeved on the second sliding rod.

[0013] Furthermore, the left fixed frame has the same structure as the left receiving frame. The left fixed frame includes a third frame body, a third semi-circular groove, a third fixed plate, a third telescopic groove, and a third sliding groove. A first positioning post is fixedly provided on the side of the third frame body away from the right fixed frame. An upper limit mechanism is sleeved on the first positioning post. The upper limit mechanism has the same structure as the lower limit mechanism.

[0014] Furthermore, the right fixed frame has the same structure as the right receiving frame. The right fixed frame includes a fourth frame body, a fourth semi-circular groove, a fourth fixed plate, a fourth insertion groove, and a fourth sliding groove. A second positioning post is fixedly provided on the side of the third frame body away from the right fixed frame, and an upper limit mechanism is sleeved on the second positioning post.

[0015] Furthermore, the first fixing plate and the third fixing plate are fixedly installed by bolts; the second fixing plate and the fourth fixing plate are fixedly installed by bolts.

[0016] Furthermore, a reset mechanism is installed on both the left and right fixed frames. The reset mechanism includes two telescopic rods, with a second reset spring fixedly connected to the inner ends of the telescopic rods. The outer ends of the telescopic rods pass through the left and right fixed frames respectively, and the ends of the two telescopic rods on the same side are fixedly connected by a fixed bracket. The two telescopic rods are located on both sides of the submarine cable. The fixed bracket is fixedly connected to the corresponding upper limit mechanism.

[0017] A method for installing and fixing offshore wind power cables using the aforementioned installation, fixing, testing, and maintenance equipment includes the following steps:

[0018] S1. Dive into the sea where the submarine cable to be repaired is located, and clamp the left and right receiving frames at the bottom of the submarine cable. Rotate the bidirectional screw to make the damaged part of the submarine cable completely inside the left and right receiving frames.

[0019] S2. Stretch the left and right fixed frames to the corresponding lengths and fasten them above the submarine cable. Secure the left receiving frame and the left fixed frame with bolts, and secure the right receiving frame and the right fixed frame with bolts.

[0020] S3. The submarine cable is lifted out by the repair vessel, the damaged part is cut off from the top opening of the left and right fixing frames, and the cut is brought close and welded by rotating the double-headed screw. After completion, the welded position is packaged and sealed.

[0021] S4. Place the repaired cable underwater, and extend the flexible curved panel by pulling the lower limit mechanism and the upper limit mechanism to complete the installation.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) This invention, through the cooperation of the left receiving frame, right receiving frame, left fixing frame, and right fixing frame, and the adjustment of the bidirectional screw, can effectively protect the submarine cable from being torn apart by external forces when it is brought to the surface, and at the same time facilitate the welding repair of the damaged part of the submarine cable without additional disassembly and fixing operations. Specifically, when the submarine cable is damaged, the submersible enters the seabed where the submarine cable to be repaired is located, and the left receiving frame and right receiving frame are clamped at the bottom of the submarine cable. By rotating the bidirectional screw, the damaged part of the submarine cable is completely inside the left receiving frame and right receiving frame. Then, the left fixing frame and right fixing frame are stretched to the corresponding length and fastened above the submarine cable. The left receiving frame and left fixing frame, as well as the right receiving frame and right fixing frame, are fixed by bolts. At this time, the two ends of the damaged part of the submarine cable are respectively limited and fixed by the left receiving frame, left fixing frame, right receiving frame, and right fixing frame. As long as the bidirectional screw is used... Without rotation, the damaged section of the submarine cable remains internally protected from stress during lifting. The stress caused by the lifting is transferred to the receiving and fixing frames, effectively preventing the cable from being torn apart and causing secondary damage when it is brought to the surface. Furthermore, after lifting the cable, there is no need to disassemble the receiving and fixing frames; repairs can be made only through the top openings of the left and right fixing frames. In cases of severe damage, the damaged portion of the cable can be cut through the top openings of the left and right fixing frames. The cable remains fixed together by the receiving and fixing frames, preventing it from breaking. The cut section can then be brought closer and welded by rotating the bidirectional screw. After welding, the welded area is sealed, allowing for quick and convenient repair of the damaged section without the need for additional disassembly or fixing operations.

[0024] (2) Through the structural design of the lower limit mechanism, this invention can not only assist in limiting the bidirectional screw to prevent accidental rotation, but also assist in quickly protecting the submarine cable after maintenance, preventing fatigue wear at the fixed connection point from causing damage. Specifically, the bidirectional screw itself is screwed to the corresponding threaded opening, and the tightness setting prevents it from easily rotating. At the same time, under the action of the first slide bar and the limit spring, the limit block abuts against the bidirectional screw, further improving the stability of the bidirectional screw and preventing accidental rotation. In addition, after the submarine cable maintenance is completed, the first semicircular groove and the second semicircular groove are protective layers for the submarine cable. Because the cable is fixed in place, after the repair vessel lifts, repairs, and repositions the submarine cable, the cable protection layer on the first and second semicircular grooves is in a worn state. If it is submerged for a long time, fatigue wear will be aggravated, leading to damage. Therefore, after the submarine cable is repositioned, the limiting ring and limiting plate are pulled to move the limiting block to the support shaft. At this time, the elastic curved panel extends out of the first telescopic groove, which can effectively limit and protect the submarine cable, preventing it from bending too much when impacted by seawater, thus preventing fatigue wear damage at the contact point between the submarine cable and the semicircular groove. Furthermore, the limiting block is locked at the support shaft under the action of the limiting spring, keeping the elastic curved panel in the extended state for long-term limiting protection.

[0025] (3) The present invention, through the cooperation of the second slide bar and the return spring, ensures that when the length of the left and right receiving frames is adjusted by the bidirectional screw, the limiting ring always fits the left and right receiving frames under the action of the return spring, so that the elastic curved panel will not extend during this operation, thereby avoiding damage to the elastic curved panel when the submarine cable is lifted, repaired and put back.

[0026] (4) Through the structural design of the reset mechanism, the fixed bracket is always in contact with the left and right fixed frames under the action of the telescopic rod and the second reset spring. Since the fixed bracket is fixedly connected to the corresponding upper limit mechanism, the elastic curved panel corresponding to the upper limit mechanism will never extend when the left and right fixed frames slide relative to each other. This comprehensively avoids damage to the elastic curved panel when the submarine cable is pulled out, repaired, or put back. At the same time, when the elastic curved panel corresponding to the upper limit mechanism needs to extend for limit protection, the fixed bracket is pulled to extend the elastic curved panel corresponding to the upper limit mechanism and the limit block abuts against the corresponding positioning post to limit it, so that the elastic curved panel on the left and right fixed frames is kept in the extended state for long-term limit protection. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an installation, fixing, testing and maintenance device for offshore wind power cables according to the present invention;

[0028] Figure 2This is a schematic cross-sectional view of an installation, fixing, testing, and maintenance device for offshore wind power cables according to the present invention.

[0029] Figure 3 This is a schematic diagram of the distributed structure of an installation, fixing, testing and maintenance equipment for offshore wind power cables according to the present invention;

[0030] Figure 4 This is a schematic diagram of the left and right fixing frames of an installation, fixing, testing and maintenance equipment for offshore wind power cables according to the present invention.

[0031] Figure 5 This is a schematic diagram of the left and right connecting frames of an installation, fixing, testing and maintenance device for offshore wind power cables according to the present invention.

[0032] Figure 6 This is a schematic diagram of a bidirectional screw structure for an installation, fixing, testing, and maintenance device for offshore wind power cables according to the present invention.

[0033] Figure 7 This is a partial structural diagram of the lower limit mechanism of an installation, fixing, testing and maintenance equipment for offshore wind power cables according to the present invention;

[0034] Figure 8 This is a schematic diagram of the dispersed partial structure of the lower limit mechanism of an installation, fixing, testing and maintenance equipment for offshore wind power cables according to the present invention.

[0035] Figure 9 This is a partial structural diagram of the reset mechanism of an installation, fixing, testing and maintenance equipment for offshore wind power cables according to the present invention;

[0036] Figure 10 This is a partial internal structure diagram of an installation, fixing, testing, and maintenance device for offshore wind power cables according to the present invention.

[0037] The attached figures are labeled as follows:

[0038] 100 - Submarine cable; 200 - Left receiving frame; 210 - First frame; 220 - First semi-circular groove; 221 - First telescopic groove; 222 - First sliding groove; 230 - First fixing plate; 300 - Right receiving frame; 310 - Second frame; 311 - First insertion groove; 320 - Second semi-circular groove; 330 - Second fixing plate; 400 - Left fixing frame; 410 - Third frame; 420 - Third semi-circular groove; 421 - Third telescopic groove; 422 - Third sliding groove; 430 - Third fixing plate; 440 - First positioning post; 500 - Right fixing frame; 510 - Fourth frame; 511 - Fourth insertion groove; 520 - Fourth Semicircular groove; 522-Fourth sliding groove; 530-Fourth fixing plate; 540-Second positioning post; 600-Double-direction screw; 610-Double-direction screw body; 620-Control knob; 621-Support shaft; 700-Lower limit mechanism; 710-Limit ring; 720-Limit plate; 730-First sliding rod; 731-Limit protrusion; 740-Limit block; 750-Limit spring; 760-Connecting rod; 770-Elastic curved panel; 800-Upper limit mechanism; 900-Reset mechanism; 910-Telescopic rod; 920-Fixed bracket; 980-Second sliding rod; 981-Second limit protrusion; 990-Reset spring. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. Of course, the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0040] Although the steps in this invention are arranged by reference numerals, this is not intended to limit the order of the steps. Unless the order of the steps is explicitly stated or the execution of a step requires other steps as a basis, the relative order of the steps can be adjusted. It is understood that the term "and / or" as used herein refers to and covers any and all possible combinations of one or more of the associated listed items.

[0041] Example

[0042] like Figures 1-10 As shown, an installation, fixing, inspection, and maintenance device for offshore wind power submarine cables includes a left receiving frame 200, a right receiving frame 300, a left fixing frame 400, and a right fixing frame 500. The left receiving frame 200 and the right receiving frame 300 are slidably connected; the left fixing frame 400 and the right fixing frame 500 are slidably connected; the left receiving frame 200 and the right receiving frame 300 are located at the bottom of the submarine cable 100, and the left fixing frame 400 and the right fixing frame 500 are located at the top of the submarine cable 100, together limiting the position of the submarine cable 100; the left receiving frame 200 and the left fixing frame 400 are fixedly installed by bolts; the right receiving frame 300 and the right fixing frame 500 are fixedly installed by bolts.

[0043] The left fixing frame 400 and the right fixing frame 500 have openings at the top; the left receiving frame 200 and the right receiving frame 300 both have threaded openings at the bottom and are screwed together with a bidirectional screw 600.

[0044] This invention, through the cooperation of the left receiving frame 200, right receiving frame 300, left fixing frame 400, and right fixing frame 500, and the adjustment of the bidirectional screw 600, can effectively protect the submarine cable 100 from being torn apart by external forces when it is brought to the surface, while also facilitating welding repair of the damaged section of the submarine cable 100 without additional disassembly and fixing operations. Specifically, when the submarine cable 100 is damaged, the submersible descends to the location of the submarine cable requiring repair, and secures the left receiving frame 200 and right fixing frame 300 to the submarine cable 100. At the bottom of the cable 100, the bidirectional screw 600 is rotated to ensure that the damaged area of ​​the cable 100 is completely inside the left receiving frame 200 and the right receiving frame 300; then, the left fixing frame 400 and the right fixing frame 500 are stretched to the corresponding length and fastened above the cable 100. The left receiving frame 200 and the left fixing frame 400, as well as the right receiving frame 300 and the right fixing frame 500, are fixed with bolts. At this point, the two ends of the damaged area of ​​the cable 100 are respectively secured by the left receiving frame 200, the left fixing frame 400, and the right receiving frame 300. The right fixed frame 500 and the right fixed frame 600 limit and fix the cable. As long as the bidirectional screw 600 does not rotate, the damaged part of the cable 100 will always be protected from stress when the cable 100 is lifted out. The stress caused by lifting is transferred to the receiving frame and the fixed frame, thus effectively protecting the cable 100 from being torn by external force when it is lifted out of the sea, preventing secondary damage. At the same time, after the cable 100 is lifted out, there is no need to disassemble the receiving frame and the fixed frame. Repair can be carried out only at the top opening of the left fixed frame 400 and the right fixed frame 500. When the damage is severe, the damaged part of the cable 100 can be cut at the top opening of the left fixed frame 400 and the right fixed frame 500. At this time, the cable 100 is still limited and fixed together by the receiving frame and the fixed frame, so it will not be broken. Then, by rotating the bidirectional screw 600, the cut part is brought close and welded. After completion, the welded part is packaged and sealed. The damaged part of the cable can be repaired quickly and conveniently without additional disassembly and fixing operations.

[0045] It is worth noting that after the submarine cable 100 is lifted out of the sea and placed on the repair vessel, simple securing work will be carried out. The submarine cable 100 can also be lifted out of the sea using components such as a hinged rope; this is a mature existing technology and will not be described in detail here.

[0046] Further, the left receiving frame 200 includes a first frame 210, with a first semicircular groove 220 and a first fixing plate 230 fixedly connected to the side of the first frame 210 away from the right receiving frame 300; the right receiving frame 300 includes a second frame 310, with a second semicircular groove 320 and a second fixing plate 330 fixedly connected to the side of the second frame 310 away from the left receiving frame 200; a first insertion groove 311 is provided on the side of the second frame 310 near the left receiving frame 200 and the first insertion groove 311 is inserted into the first frame 210; a submarine cable 100 is built into the first semicircular groove 220 and the second semicircular groove 320.

[0047] It is worth noting that the submarine cable 100 consists of a cable core and an outer protective sheath, which will not be described in detail here.

[0048] Furthermore, the bidirectional screw 600 includes a bidirectional screw body 610 with opposite thread directions at its left and right ends. The ends of the bidirectional screw body 610 are all fixedly connected to a control knob 620 via a support shaft 621. Rotation of the control knob 620 controls the rotation of the bidirectional screw body 610, thereby causing the left receiving frame 200 and the right receiving frame 300 to move relative to each other.

[0049] It is worth noting that the ease of rotation of the bidirectional screw 600 can be controlled by adjusting the tightness between the bidirectional screw 600 and the corresponding thread. This is a standard setting and will not be described in detail here.

[0050] Furthermore, the bottom of both the first semicircular groove 220 and the second semicircular groove 320 is provided with a first sliding groove 222, and the sidewalls of both the first semicircular groove 220 and the second semicircular groove 320 are provided with a first telescopic groove 221, the first telescopic groove 221 and the first sliding groove 222 are connected; both ends of the bidirectional screw 600 are provided with a lower limiting mechanism 700, the lower limiting mechanism 700 includes a limiting ring 710 sleeved on the bidirectional screw 600, and the top of the limiting ring 710 is connected by a connecting rod. 760 is fixedly connected to the elastic curved panel 770, which is located in the corresponding first telescopic groove 221; the two sides of the limiting ring 710 are fixedly connected to the limiting plate 720, and the limiting plate 720 has a spring groove, on which the first slide rod 730 is slidably connected; the two ends of the first slide rod 730 are respectively fixedly connected to the limiting protrusion 731 and the limiting block 740, and the side of the limiting block 740 near the bidirectional screw 600 is a curved structure; a limiting spring 750 is sleeved on the first slide rod 730.

[0051] This invention, through the structural design of the lower limiting mechanism 700, can both assist in limiting the bidirectional screw 600 to prevent accidental rotation and provide auxiliary protection for the submarine cable 100 after maintenance, preventing fatigue wear and damage at the fixed connection. Specifically, the bidirectional screw 600 is screwed to the corresponding threaded end, and the tightness setting prevents it from easily rotating. Simultaneously, under the action of the first slide bar 730 and the limiting spring 750, the limiting block 740 abuts against the bidirectional screw 600, further improving the stability of the bidirectional screw 600 and preventing accidental rotation. Furthermore, after the submarine cable 100 is maintained, the first semicircular groove 220 and the second semicircular groove 320 limit and fix the protective layer of the submarine cable 100. Therefore, after the repair vessel performs the operations of lifting, repairing, and retrieving the submarine cable 100, the protective layer of the submarine cable 100 on the first semicircular groove 220 and the second semicircular groove 320 is in a worn state. If it is submerged for a long time, it will aggravate fatigue wear and cause damage. Therefore, after the submarine cable 100 is submerged, by pulling the limiting ring 710 and the limiting plate 720, the limiting block 740 is pulled to the support shaft 621. At this time, the elastic curved panel 770 extends out of the first telescopic groove 221, which can effectively limit and protect the submarine cable 100, so that the submarine cable 100 will not bend too much when it is impacted by seawater, which will cause fatigue wear damage at the contact point between the submarine cable 100 and the semicircular groove. In addition, the limiting block 740 is locked at the support shaft 621 under the action of the limiting spring 750, so that the elastic curved panel 770 is kept in the extended state for long-term limiting protection.

[0052] It is worth noting that the side of the limiting block 740 closest to the bidirectional screw 600 has a curved structure, which allows the limiting ring 710 and the limiting plate 720 to be pulled quickly.

[0053] Furthermore, sliding holes are provided on both sides of the threaded opening of the left receiving frame 200 and the right receiving frame 300, and a second sliding rod 980 is slidably connected to the sliding holes; one end of the sliding rod 980 is fixedly connected to the corresponding limiting plate 720, and the other end is fixedly connected to the second limiting protrusion 981; a return spring 990 is sleeved on the second sliding rod 980.

[0054] The present invention, through the cooperation of the second slide bar 980 and the return spring 990, ensures that when the lengths of the left receiving frame 200 and the right receiving frame 300 are adjusted by the bidirectional screw 600, the limiting ring 710 remains in contact with the left receiving frame 200 and the right receiving frame 300 under the action of the return spring 990. This prevents the elastic curved panel 770 from extending during this operation, thereby avoiding damage to the elastic curved panel 770 when the submarine cable 100 is lifted, repaired, or put back.

[0055] Furthermore, the left fixed frame 400 has the same structure as the left receiving frame 200. The left fixed frame 400 includes a third frame body 410, a third semi-circular groove 420, a third fixed plate 430, a third telescopic groove 421, and a third sliding groove 422. A first positioning post 440 is fixedly provided on the side of the third frame body 410 away from the right fixed frame 500. An upper limit mechanism 800 is sleeved on the first positioning post 440. The upper limit mechanism 800 has the same structure as the lower limit mechanism 700.

[0056] Furthermore, the right fixed frame 500 has the same structure as the right receiving frame 300. The right fixed frame 500 includes a fourth frame body 510, a fourth semi-circular groove 520, a fourth fixed plate 530, a fourth insertion groove 511, and a fourth sliding groove 522. A second positioning post 540 is fixedly provided on the side of the third frame body 410 away from the right fixed frame 400, and an upper limit mechanism 800 is sleeved on the second positioning post 540.

[0057] Furthermore, the first fixing plate 230 and the third fixing plate 430 are fixedly installed by bolts; the second fixing plate 330 and the fourth fixing plate 530 are fixedly installed by bolts.

[0058] Furthermore, a reset mechanism 900 is jointly installed on the left fixed frame 400 and the right fixed frame 500. The reset mechanism includes two telescopic rods 910, with a second reset spring fixedly connected to the inner two ends of each telescopic rod 910. The outer two ends of each telescopic rod 910 pass through the left fixed frame 400 and the right fixed frame 500 respectively, and the ends of the two telescopic rods 910 on the same side are fixedly connected by a fixed bracket 920. The two telescopic rods 910 are located on both sides of the submarine cable 100. The fixed bracket 920 is fixedly connected to the corresponding upper limit mechanism 800.

[0059] Through the structural design of the reset mechanism 900, this invention ensures that the fixed bracket 920 remains in contact with the left fixed frame 400 and the right fixed frame 500 under the action of the telescopic rod 910 and the second reset spring. Since the fixed bracket 920 is fixedly connected to the corresponding upper limit mechanism 800, the elastic curved panel corresponding to the upper limit mechanism 800 will never extend when the left fixed frame 400 and the right fixed frame 500 slide relative to each other. This comprehensively avoids damage to the elastic curved panel 770 during the lifting, maintenance, and repositioning of the submarine cable 100. At the same time, when it is necessary for the elastic curved panel corresponding to the upper limit mechanism 800 to extend for limit protection, the fixed bracket 920 is pulled to extend the elastic curved panel corresponding to the upper limit mechanism 800 and for the limit block to abut against the corresponding positioning post for limit protection. This ensures that the elastic curved panels on the left fixed frame 400 and the right fixed frame 500 remain extended for long-term limit protection.

[0060] It is worth noting that the force of the second reset spring inside the telescopic rod 910 of the present invention can be adjusted in a conventional manner, thereby avoiding excessive force that would cause the left fixed frame 400 and the right fixed frame 500 to retract and move relative to each other. This will not be described in detail here.

[0061] A method for installing and fixing offshore wind power cables using the aforementioned installation, fixing, testing, and maintenance equipment includes the following steps:

[0062] S1. Dive into the seabed where the submarine cable to be repaired is located, and place the left receiving frame 200 and the right receiving frame 300 at the bottom of the submarine cable 100. Rotate the bidirectional screw 600 to make the damaged part of the submarine cable 100 completely inside the left receiving frame 200 and the right receiving frame 300.

[0063] S2. Stretch the left fixing frame 400 and the right fixing frame 500 to the corresponding length and fasten them above the submarine cable 100. Fix the left receiving frame 200 and the left fixing frame 400 and the right receiving frame 300 and the right fixing frame 500 with bolts.

[0064] S3. The submarine cable is lifted out by the repair vessel, and the damaged part is cut off from the top opening of the left fixing frame 400 and the right fixing frame 500. The cut part is brought close and welded by rotating the bidirectional screw 600. After completion, the welded position is packaged and sealed.

[0065] S4. Place the repaired submarine cable 100 underwater, and extend the elastic curved panel 770 by pulling the lower limit mechanism 700 and the upper limit mechanism 800 to complete the installation.

[0066] It is worth noting that the packaging sealing method of this invention can be achieved by using sealing tape or metal sleeve, which are conventional methods and will not be described in detail here.

[0067] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. An installation, fixing, testing, and maintenance device for offshore wind power cables, characterized in that, The cable includes a left receiving frame (200), a right receiving frame (300), a left fixing frame (400), and a right fixing frame (500). The left receiving frame (200) and the right receiving frame (300) are slidably connected; the left fixing frame (400) and the right fixing frame (500) are slidably connected; the left receiving frame (200) and the right receiving frame (300) are located at the bottom of the submarine cable (100), and the left fixing frame (400) and the right fixing frame (500) are located at the top of the submarine cable (100), together limiting the submarine cable (100); the left receiving frame (200) and the left fixing frame (400) are fixedly installed by bolts; the right receiving frame (300) and the right fixing frame (500) are fixedly installed by bolts. The left fixing frame (400) and the right fixing frame (500) have openings at the top; the left receiving frame (200) and the right receiving frame (300) are both provided with threaded openings at the bottom and are jointly screwed with a bidirectional screw (600); The left receiving frame (200) includes a first frame (210), on the side of the first frame (210) away from the right receiving frame (300) a first semi-circular groove (220) and a first fixing plate (230) are fixedly connected; the right receiving frame (300) includes a second frame (310), on the side of the second frame (310) away from the left receiving frame (200) a second semi-circular groove (320) and a second fixing plate (330) are fixedly connected; the second frame (310) has a first insertion groove (311) on the side of the second frame (310) close to the left receiving frame (200) and the first insertion groove (311) is inserted into the first frame (210); a submarine cable (100) is built into the first semi-circular groove (220) and the second semi-circular groove (320); The bidirectional screw (600) includes a bidirectional screw body (610) with opposite thread directions at the left and right ends, and the ends of the bidirectional screw body (610) are fixedly connected to the control knob (620) via a support shaft (621). The bottom of both the first semicircular groove (220) and the second semicircular groove (320) is provided with a first sliding groove (222), and the sidewalls of both the first semicircular groove (220) and the second semicircular groove (320) are provided with a first telescopic groove (221). The first telescopic groove (221) and the first sliding groove (222) are connected. Both ends of the bidirectional screw (600) are provided with a lower limiting mechanism (700). The lower limiting mechanism (700) includes a limiting ring (710) sleeved on the bidirectional screw (600). The top of the limiting ring (710) is connected by a connecting rod (760). A fixed connection elastic curved panel (770) is located in the corresponding first telescopic groove (221); a limiting plate (720) is fixedly connected to both sides of the limiting ring (710), and a spring groove is opened on the limiting plate (720), and a first slide rod (730) is slidably connected on the spring groove; a limiting protrusion (731) and a limiting block (740) are fixedly connected to both ends of the first slide rod (730), and the side of the limiting block (740) near the bidirectional screw (600) is a curved structure; a limiting spring (750) is sleeved on the first slide rod (730).

2. The installation, fixing, testing, and maintenance equipment for offshore wind power cables according to claim 1, characterized in that, The left receiving frame (200) and the right receiving frame (300) have sliding holes on both sides of the threaded opening, and a second sliding rod (980) is slidably connected to the sliding holes; one end of the sliding rod (980) is fixedly connected to the corresponding limiting plate (720), and the other end is fixedly connected to the second limiting protrusion (981); a return spring (990) is sleeved on the second sliding rod (980).

3. The installation, fixing, testing, and maintenance equipment for offshore wind power cables according to claim 1, characterized in that, The left fixed frame (400) has the same structure as the left receiving frame (200). The left fixed frame (400) includes a third frame body (410), a third semi-circular groove (420), a third fixed plate (430), a third telescopic groove (421), and a third sliding groove (422). A first positioning post (440) is fixedly provided on the side of the third frame body (410) away from the right fixed frame (500). An upper limit mechanism (800) is sleeved on the first positioning post (440). The upper limit mechanism (800) has the same structure as the lower limit mechanism (700).

4. The installation, fixing, testing, and maintenance equipment for offshore wind power cables according to claim 3, characterized in that, The right fixed frame (500) has the same structure as the right receiving frame (300). The right fixed frame (500) includes a fourth frame body (510), a fourth semi-circular groove (520), a fourth fixed plate (530), a fourth insertion groove (511), and a fourth sliding groove (522). The third frame body (410) is fixedly provided with a second positioning post (540) on the side away from the left fixed frame (400). An upper limit mechanism (800) is sleeved on the second positioning post (540).

5. The installation, fixing, testing, and maintenance equipment for offshore wind power cables according to claim 4, characterized in that, The first fixing plate (230) and the third fixing plate (430) are fixedly installed by bolts; the second fixing plate (330) and the fourth fixing plate (530) are fixedly installed by bolts.

6. The installation, fixing, testing, and maintenance equipment for offshore wind power cables according to claim 4, characterized in that, A reset mechanism (900) is installed on both the left fixed frame (400) and the right fixed frame (500). The reset mechanism includes two telescopic rods (910). The two ends of the telescopic rods (910) are fixedly connected to the second reset spring. The two ends of the telescopic rods (910) pass through the left fixed frame (400) and the right fixed frame (500) respectively. The ends of the two telescopic rods (910) on the same side are fixedly connected by a fixed bracket (920). The two telescopic rods (910) are located on both sides of the submarine cable (100). The fixed bracket (920) is fixedly connected to the corresponding upper limit mechanism (800).

7. A method for installing and fixing offshore wind power submarine cables using the installation, fixing, testing, and maintenance equipment according to any one of claims 1 to 6, characterized in that, Includes the following steps: S1. Dive into the sea where the submarine cable to be repaired is located, and place the left receiving frame (200) and the right receiving frame (300) at the bottom of the submarine cable (100). Rotate the bidirectional screw (600) so that the damaged part of the submarine cable (100) is completely inside the left receiving frame (200) and the right receiving frame (300). S2. Stretch the left fixing frame (400) and the right fixing frame (500) to the corresponding length and fasten them above the submarine cable (100). Fix the left receiving frame (200) and the left fixing frame (400) and the right receiving frame (300) and the right fixing frame (500) with bolts. S3. The submarine cable is lifted out by the repair vessel, and the damaged part is cut off from the top opening of the left fixed frame (400) and the right fixed frame (500). The cut is brought close and welded by rotating the double-ended screw (600). After completion, the welded position is packaged and sealed. S4. Place the repaired submarine cable (100) underwater, and extend the elastic curved panel (770) by pulling the lower limit mechanism (700) and the upper limit mechanism (800) to complete the installation.

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