Installation, fixation, detection and maintenance equipment and method for offshore wind power submarine cable

Abstract

The invention belongs to the technical field of submarine cable installation, and particularly relates to installation, fixation, detection and maintenance equipment and method for an offshore wind power submarine cable. Comprising a left bearing frame, a right bearing frame, a left fixing frame and a right fixing frame, and the left bearing frame and the right bearing frame are connected in a sliding and inserted mode; the left fixing frame and the right fixing frame are connected in a sliding and inserted mode. The left bearing frame and the right bearing frame are located at the bottom of a submarine cable, and the left fixing frame and the right fixing frame are located at the top of the submarine cable and jointly limit the submarine cable. The left bearing frame and the left fixing frame are fixedly installed through bolts. The right bearing frame and the right fixing frame are fixedly installed through bolts. The submarine cable can be effectively protected from being pulled apart by external force when being lifted out of the sea surface, and meanwhile, the submarine cable at the damaged position can be conveniently welded and repaired without additional dismounting and fixing operation; the device can assist in limiting the bidirectional screw to prevent the bidirectional screw from rotating accidentally, and can assist in quickly performing auxiliary protection on the submarine cable after maintenance is completed.

Description

Technical Field

[0001] The present invention belongs to the technical field of submarine cable installation, and particularly relates to an installation, fixation, detection and maintenance device and method for an offshore wind power submarine cable. Background Art

[0002] A wind power submarine cable is a submarine cable specifically used for power transmission between an offshore wind farm and the land in a wind power project. It transmits the electric energy generated by the offshore wind farm to the land power grid to achieve grid-connected power generation of wind power. The wind power submarine cable has characteristics such as waterproof, anti-corrosion, and anti-electromagnetic interference, and can withstand the harsh conditions of the seabed environment to ensure stable and safe power transmission. The wind power submarine cable is prone to damage in the seabed environment, mainly due to factors such as the friction of the seabed, the scouring of ocean currents, the invasion of marine organisms, and occasional dragging by ship anchor chains. These external pressures may cause wear or breakage of the cable outer sheath, thereby affecting power transmission.

[0003] Chinese Patent with application number 202411223692.6 discloses a central positioning protection device for submarine cable laying, including a J-shaped pipe. The lower end of the J-shaped pipe is docked with a docking protection device. The docking protection device includes sliding blocks arranged at equal intervals in a ring shape. First chutes and second chutes are respectively opened on both sides of the sliding block, and both the first chute and the second chute are fixedly connected to a clamping block, effectively solving the problem that the existing central positioning protection device for submarine cables consists of two symmetrically arranged positioning components, which are composed of a first semi-circular straight tube and a second semi-circular straight tube. During use, through the fixing method of multiple screws and nuts, it is ensured that the clamp can be tightly fixed around the submarine cable to prevent the submarine cable from shifting during movement or use. However, this method is rather cumbersome for the installation of cable bending protection at the lower port of the J-shaped pipe, and the subsequent disassembly of the device during long-term use will result in low disassembly efficiency.

[0004] After a wind power submarine cable is partially damaged, emergency repair and power-on are required. Usually, a repair ship is used to lift the damaged part of the submarine cable out of the sea for repair work. However, since the damaged submarine cable is very easy to be torn off by external forces, it is impossible to quickly lift the submarine cable out; at the same time, during the repair process after lifting the submarine cable out, complex installation and fixation equipment is often required for operation, which is troublesome to operate. After the repair is completed, a cumbersome disassembly and replacement operation is required, and when replacing, secondary damage is caused due to the insecure repair position of the submarine cable. Summary of the Invention

[0005] To address the deficiencies of the prior art, the present invention provides an installation, fixation, detection, and repair device for offshore wind power submarine cables. Through the cooperation of the left receiving frame, right receiving frame, left fixing frame, and right fixing frame, and by adjusting the bidirectional screw, it can effectively protect the submarine cable from being torn by external forces when it is lifted out of the sea surface. At the same time, it can facilitate the welding repair of the damaged submarine cable without additional disassembly and fixing operations. Through the structural design of the lower limit mechanism, it can not only assist in limiting the bidirectional screw to prevent accidental rotation of the bidirectional screw, but also assist in quickly protecting the submarine cable after the repair is completed, preventing problems such as fatigue wear and damage at the fixed connection.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] An installation, fixation, detection, and repair device for offshore wind power submarine cables, including 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 inserted; the left fixing frame and the right fixing frame are slidably inserted; the left receiving frame and the right receiving frame are located at the bottom of the submarine cable, and the left fixing frame and the right fixing frame are located at the top of the submarine cable, jointly limiting the submarine cable; the left receiving frame and the left fixing frame are fixedly installed by bolts; the right receiving frame and the right fixing frame are fixedly installed by bolts;

[0008] The tops of the left fixing frame and the right fixing frame are open; threaded holes are provided at the bottoms of the left receiving frame and the right receiving frame, and a bidirectional screw is commonly screwed into them.

[0009] Further, the left receiving frame includes a first frame body. One side of the first frame body away from the right receiving frame is fixedly connected to a first semi-circular groove and a first fixing plate; the right receiving frame includes a second frame body. One side of the second frame body away from the left receiving frame is fixedly connected to a second semi-circular groove and a second fixing plate; a first insertion groove is provided on the side of the second frame body close to the left receiving frame, and the first insertion groove is inserted into the first frame body; the submarine cable is placed inside the first semi-circular groove and the second semi-circular groove.

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

[0011] Further, first sliding grooves are formed at the bottoms of the first semi-circular groove and the second semi-circular groove, and first telescopic grooves are formed in the side walls of the first semi-circular groove and the second semi-circular groove. The first telescopic grooves and the first sliding grooves are communicated; lower limiting mechanisms are arranged at both ends of the bidirectional screw rod. The lower limiting mechanism includes a limiting ring sleeved on the bidirectional screw rod. The top of the limiting ring is fixedly connected to an elastic curved panel through a connecting rod. The elastic curved panel is located in the corresponding first telescopic groove; limiting plates are fixedly connected to both sides of the limiting ring, spring grooves are formed in the limiting plates, and first sliding rods are slidably connected to the spring grooves; limiting protrusions and limiting blocks are respectively fixedly connected to both ends of the first sliding rod. The side of the limiting block close to the bidirectional screw rod is a curved surface structure; a limiting spring is sleeved on the first sliding rod.

[0012] Further, sliding holes are formed on both sides of the threaded ports of the left receiving frame and the right receiving frame, and second sliding rods are 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 a second limiting protrusion. A return spring is sleeved on the second sliding rod.

[0013] Further, the left fixing frame has the same structure as the left receiving frame. The left fixing frame includes a third frame body, a third semi-circular groove, a third fixing plate, a third telescopic groove, and a third sliding groove; a first positioning column is fixedly arranged on the side of the third frame body away from the right fixing frame. An upper limiting mechanism is sleeved on the first positioning column, and the upper limiting mechanism has the same structure as the lower limiting mechanism.

[0014] Further, the right fixing frame has the same structure as the right receiving frame. The right fixing frame includes a fourth frame body, a fourth semi-circular groove, a fourth fixing plate, a fourth insertion slot, and a fourth sliding groove; a second positioning column is fixedly arranged on the side of the third frame body away from the right fixing frame. An upper limiting mechanism is sleeved on the second positioning column.

[0015] Further, 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] Further, a reset mechanism is jointly installed on the left fixing frame and the right fixing frame. The reset mechanism includes two telescopic rods. Second return springs are fixedly connected to both ends inside the telescopic rods; both ends outside the telescopic rods respectively pass through the left fixing frame and the right fixing frame, and the ends on the same side of the two telescopic rods are jointly fixedly connected through a fixing bracket; the two telescopic rods are located on both sides of the submarine cable; the fixing bracket is fixedly connected to the corresponding upper limiting mechanism.

[0017] A method for installation and fixation using the above installation, fixation, detection, and repair equipment for offshore wind power submarine cables includes the following steps:

[0018] S1. Dive underwater to the location of the submarine cable to be repaired, clamp the left and right receiving frames at the bottom of the submarine cable, and rotate the bidirectional screw to ensure that the damaged part of the submarine cable is completely inside the left and right receiving frames;

[0019] S2. Stretch the left and right fixing frames to the corresponding lengths and buckle them above the submarine cable, and fix the left receiving frame and the left fixing frame and the right receiving frame and the right fixing frame with bolts;

[0020] S3. Lift the submarine cable at this location by the repair ship, cut off the damaged part from the top openings of the left and right fixing frames, and rotate the bidirectional screw to make the cut parts close and weld. After completion, perform packaging and sealing treatment on the welding position;

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

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

[0023] (1) Through the cooperation of the left receiving frame, the right receiving frame, the left fixing frame and the right fixing frame, and the adjustment of the bidirectional screw, the present invention can not only effectively protect the submarine cable from being torn by external forces when it is lifted out of the sea surface, but also 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, dive underwater to the location of the submarine cable to be repaired, clamp the left and right receiving frames at the bottom of the submarine cable, and rotate the bidirectional screw to ensure that the damaged part of the submarine cable is completely inside the left and right receiving frames; then stretch the left and right fixing frames to the corresponding lengths and buckle them above the submarine cable, and fix the left receiving frame and the left fixing frame and the right receiving frame and the right fixing frame with bolts. At this time, both ends of the damaged part of the submarine cable are limited and fixed by the left receiving frame, the left fixing frame, the right receiving frame and the right fixing frame. As long as the bidirectional screw does not rotate, the damaged part of the submarine cable will always be protected inside and not be stressed when the submarine cable is lifted, and the stress point caused by lifting is transferred to the receiving frame and the fixing frame, thus effectively protecting the submarine cable from being torn by external forces when it is lifted out of the sea surface and causing secondary damage; at the same time, after the submarine cable is lifted out, there is no need to disassemble the receiving frame and the fixing frame, and only the repair needs to be carried out from the top openings of the left and right fixing frames. When the damage is severe, the damaged part of the submarine cable can be cut off from the top openings of the left and right fixing frames. At this time, the whole submarine cable is still limited and fixed together by the receiving frame and the fixing frame, so it will not be in a disconnected state. At this time, rotate the bidirectional screw to make the cut parts close and weld, and after completion, perform packaging and sealing treatment on the welding position, so that the damaged part of the submarine cable can be quickly repaired, which is convenient and fast without additional disassembly and fixing operations.

[0024] (2) Through the structural design of the lower limit mechanism of the present invention, it can not only assist in limiting the bidirectional screw to prevent accidental rotation of the bidirectional screw, but also assist in quickly carrying out auxiliary protection work on the submarine cable after maintenance to prevent problems such as fatigue wear and damage at the fixed connection. Specifically, the bidirectional screw itself is screwed to the corresponding thread opening and will not rotate easily due to the setting of tightness. At the same time, under the action of the first sliding rod and the limiting spring, the limiting block abuts against the bidirectional screw, further improving the stability of the bidirectional screw and preventing accidental rotation of the bidirectional screw. At the same time, after the submarine cable is repaired, since the first semi-circular groove and the second semi-circular groove limit and fix the protective layer of the submarine cable, after the maintenance ship raises, repairs and puts back the submarine cable, the protective layer of the submarine cable on the first semi-circular groove and the second semi-circular groove is in a worn state. If it remains underwater for a long time, it will exacerbate fatigue wear and cause damage. Therefore, after the submarine cable is put back underwater, by pulling the limiting ring and the limiting plate, the limiting block is pulled 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, so that the submarine cable will not be bent too much when impacted by seawater, resulting in fatigue wear and damage at the contact between the submarine cable and the semi-circular groove. And the limiting block is clamped at the support shaft under the action of the limiting spring, so that the elastic curved panel remains in the extended state for long-term limiting protection.

[0025] (3) Through the cooperation of the second sliding rod and the return spring of the present invention, when adjusting the lengths of the left receiving frame and the right receiving frame through the bidirectional screw, under the action of the return spring, the limiting ring always fits the left receiving frame and the right receiving frame, so that the elastic curved panel will not extend out during this operation process, thus avoiding damage to the elastic curved panel when the submarine cable is raised, repaired and put back.

[0026] (4) Through the structural design of the reset mechanism, under the action of the telescopic rod and the second return spring, the fixed bracket always fits the left fixed frame and the right fixed frame. Since the fixed bracket is fixedly connected to the corresponding upper limit mechanism, when the left fixed frame and the right fixed frame slide relative to each other, the elastic curved panel corresponding to the upper limit mechanism also will never extend out, comprehensively avoiding damage to the elastic curved panel when the submarine cable is raised, repaired and put back. At the same time, when it is necessary for the elastic curved panel corresponding to the upper limit mechanism to extend out for limiting protection, pull the fixed bracket to make the elastic curved panel corresponding to the upper limit mechanism extend out and the limiting block abut against the corresponding positioning column for limiting, so as to realize that the elastic curved panels on the left fixed frame and the right fixed frame remain in the extended state for long-term limiting protection. Description of the Drawings

[0027] Figure 1 is the overall structural schematic diagram of an installation, fixation, detection and repair device for an offshore wind power submarine cable of the present invention;

[0028] Figure 2Schematic cross-sectional structure diagram of an installation, fixing, detecting and repairing device for an offshore wind power submarine cable according to the present invention;

[0029] Figure 3 Schematic dispersed structure diagram of an installation, fixing, detecting and repairing device for an offshore wind power submarine cable according to the present invention;

[0030] Figure 4 Schematic structure diagram of the left fixing frame and the right fixing frame of an installation, fixing, detecting and repairing device for an offshore wind power submarine cable according to the present invention;

[0031] Figure 5 Schematic structure diagram of the left connecting frame and the right connecting frame of an installation, fixing, detecting and repairing device for an offshore wind power submarine cable according to the present invention;

[0032] Figure 6 Schematic structure diagram of the bidirectional screw of an installation, fixing, detecting and repairing device for an offshore wind power submarine cable according to the present invention;

[0033] Figure 7 Schematic partial structure diagram of the lower limit mechanism of an installation, fixing, detecting and repairing device for an offshore wind power submarine cable according to the present invention;

[0034] Figure 8 Schematic dispersed partial structure diagram of the lower limit mechanism of an installation, fixing, detecting and repairing device for an offshore wind power submarine cable according to the present invention;

[0035] Figure 9 Schematic partial structure diagram of the reset mechanism of an installation, fixing, detecting and repairing device for an offshore wind power submarine cable according to the present invention;

[0036] Figure 10 Schematic partial internal structure diagram of an installation, fixing, detecting and repairing device for an offshore wind power submarine cable according to the present invention;

[0037] The reference numerals are as follows:

[0038] 100 - Submarine cable; 200 - Left receiving frame; 210 - First frame body; 220 - First semi - circular groove; 221 - First telescopic groove; 222 - First sliding groove; 230 - First fixing plate; 300 - Right receiving frame; 310 - Second frame body; 311 - First insertion slot; 320 - Second semi - circular groove; 330 - Second fixing plate; 400 - Left fixing frame; 410 - Third frame body; 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 body; 511 - Fourth insertion slot; 520 - Fourth semi - circular groove; 522 - Fourth sliding groove; 530 - Fourth fixing plate; 540 - Second positioning post; 600 - Bi - directional screw; 610 - Bi - directional 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 manners

[0039] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further elaborates on the present invention in conjunction with embodiments. Of course, the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] Although the steps in the present invention are numbered, they are not used to limit the order of the steps. Unless the order of the steps is clearly stated or the execution of a certain step requires other steps as a basis, the relative order of the steps can be adjusted. It can be understood that the term "and / or" used herein involves and covers any and all possible combinations of one or more of the associated listed items.

[0041] Embodiment

[0042] As Figures 1 to 10 shown, an installation, fixing, detection and maintenance device for an offshore wind power submarine 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 inserted; the left fixing frame 400 and the right fixing frame 500 are slidably inserted; 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, jointly 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;

[0043] The top of the left fixing frame 400 and the right fixing frame 500 is open; threaded openings are provided at the bottoms of the left receiving frame 200 and the right receiving frame 300, and a bidirectional screw rod 600 is commonly screwed thereto.

[0044] Through the cooperation of the left receiving frame 200, the right receiving frame 300, the left fixing frame 400 and the right fixing frame 500, and through the adjustment of the bidirectional screw rod 600, the present invention can not only effectively protect the submarine cable 100 from being torn by external forces when being lifted out of the sea surface, but also facilitate the welding repair of the damaged submarine cable 100 without additional disassembly and fixing operations; specifically, when the submarine cable 100 is damaged, it dives underwater to the location of the submarine cable to be repaired, clamps the left receiving frame 200 and the right receiving frame 300 at the bottom of the submarine cable 100, and rotates the bidirectional screw rod 600 to make the damaged part of the submarine cable 100 completely inside the left receiving frame 200 and the right receiving frame 300; then stretches the left fixing frame 400 and the right fixing frame 500 to the corresponding lengths and buckles them above the submarine cable 100, and fixes the left receiving frame 200 and the left fixing frame 400 and fixes the right receiving frame 300 and the right fixing frame 500 through bolts. At this time, both ends of the damaged part of the submarine cable 100 are limited and fixed by the left receiving frame 200, the left fixing frame 400, the right receiving frame 300 and the right fixing frame 500. As long as the bidirectional screw rod 600 does not rotate, when the submarine cable 100 is lifted out, the damaged part of the submarine cable 100 will always be protected inside and not be stressed, and the stress point caused by lifting is transferred to the receiving frame and the fixing frame, so as to effectively protect the submarine cable 100 from being torn by external forces when being lifted out of the sea surface and causing secondary damage; at the same time, after the submarine cable 100 is lifted out, there is no need to disassemble the receiving frame and the fixing frame, and only need to repair it from the top opening of the left fixing frame 400 and the right fixing frame 500. When the damage is serious, the damaged part of the submarine cable 100 can be cut off from the top opening of the left fixing frame 400 and the right fixing frame 500. At this time, the whole submarine cable 100 is still limited and fixed together by the receiving frame and the fixing frame, so there will be no disconnected state. At this time, by rotating the bidirectional screw rod 600 to make the cut part close and weld, and after completion, the welding position is packaged and sealed, the damaged part of the submarine cable can be quickly repaired, which is convenient and fast without additional disassembly and fixing operations.

[0045] It should be noted that when the submarine cable 100 is lifted out of the sea surface and placed on the repair ship, simple fixing work will be carried out. At the same time, the submarine cable 100 can be lifted out of the sea surface by components such as a hinge rope, which is a mature existing technology and will not be described in detail here.

[0046] Further, the left receiving frame 200 includes a first frame body 210. On one side of the first frame body 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 body 310. On one side of the second frame body 310 away from the left receiving frame 200, a second semi-circular groove 320 and a second fixing plate 330 are fixedly connected; on one side of the second frame body 310 close to the left receiving frame 200, a first insertion groove 311 is provided and the first insertion groove 311 is inserted with the first frame body 210; the submarine cable 100 is placed in the first semi-circular groove 220 and the second semi-circular groove 320.

[0047] It should be noted that the submarine cable 100 is composed of a cable core and an external protective sleeve, which will not be described in detail here.

[0048] Further, the bidirectional screw 600 includes a bidirectional screw body 610 with opposite thread directions at the left and right ends. The ends of the bidirectional screw body 610 are fixedly connected to control knobs 620 through support shafts 621. By rotating the control knob 620, the bidirectional screw body 610 is rotated, thereby driving the left receiving frame 200 and the right receiving frame 300 to move relatively.

[0049] It should be noted that the rotation difficulty of the bidirectional screw 600 can be controlled by setting the tightness between the bidirectional screw 600 and the corresponding thread ports, which is a conventional setting and will not be described in detail here.

[0050] Furthermore, first sliding grooves 222 are provided at the bottoms of the first semi-circular groove 220 and the second semi-circular groove 320, and first telescopic grooves 221 are provided on the side walls of the first semi-circular groove 220 and the second semi-circular groove 320. The first telescopic grooves 221 and the first sliding grooves 222 are communicated; lower limit mechanisms 700 are provided at both ends of the bidirectional screw 600. The lower limit mechanism 700 includes a limit ring 710 sleeved on the bidirectional screw 600. The top of the limit ring 710 is fixedly connected to an elastic curved panel 770 through a connecting rod 760. The elastic curved panel 770 is located in the corresponding first telescopic groove 221; limiting plates 720 are fixedly connected to both sides of the limit ring 710. Spring grooves are provided on the limiting plates 720, and first sliding rods 730 are slidably connected to the spring grooves; both ends of the first sliding rod 730 are fixedly connected to a limiting protrusion 731 and a limiting block 740 respectively. The side of the limiting block 740 close to the bidirectional screw 600 is a curved surface structure; a limiting spring 750 is sleeved on the first sliding rod 730.

[0051] Through the structural design of the lower limit mechanism 700, the present invention can not only assist in limiting the bidirectional screw 600 to prevent accidental rotation of the bidirectional screw 600, but also assist in quickly carrying out auxiliary protection work on the submarine cable 100 after maintenance to prevent damage caused by fatigue wear at the fixed connection; specifically, the bidirectional screw 600 itself is screwed to the corresponding threaded port, and it will not rotate easily due to the setting of the tightness. At the same time, under the action of the first slide bar 730 and the limit spring 750, the limit block 740 abuts against the bidirectional screw 600, further improving the stability of the bidirectional screw 600 and preventing accidental rotation of the bidirectional screw 600; at the same time, after the maintenance of the submarine cable 100 is completed, since the first semi-circular groove 220 and the second semi-circular groove 320 limit and fix the protective layer of the submarine cable 100, after the maintenance ship performs the operations of lifting, maintaining, and placing back the submarine cable 100, the protective layer of the submarine cable 100 on the first semi-circular groove 220 and the second semi-circular groove 320 is in a worn state. If it remains underwater for a long time, it will exacerbate fatigue wear and cause damage. Therefore, after the submarine cable 100 is placed back underwater, by pulling the limit ring 710 and the limit plate 720, the limit 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 when the submarine cable 100 is impacted by seawater, it will not be bent too much, resulting in fatigue wear and damage at the contact between the submarine cable 100 and the semi-circular groove; and the limit block 740 is clamped at the support shaft 621 under the action of the limit spring 750, so that the elastic curved panel 770 remains in the extended state for long-term limit protection.

[0052] It should be noted that the side of the limit block 740 close to the bidirectional screw 600 is a curved surface structure, so the limit ring 710 and the limit plate 720 can be quickly pulled.

[0053] Furthermore, sliding holes are opened on both sides of the threaded ports of the left receiving frame 200 and the right receiving frame 300, and the second slide bar 980 is slidably connected to the sliding holes; one end of the slide bar 980 is fixedly connected to the corresponding limit plate 720, and the other end is fixedly connected to the second limit protrusion 981. A return spring 990 is sleeved on the second slide bar 980.

[0054] Through the cooperation of the second slide bar 980 and the return spring 990, when the lengths of the left receiving frame 200 and the right receiving frame 300 are adjusted by the bidirectional screw 600, under the action of the return spring 990, the limit ring 710 always fits against the left receiving frame 200 and the right receiving frame 300, so that the elastic curved panel 770 will not extend during this operation process, thus avoiding damage to the elastic curved panel 770 when the submarine cable 100 is lifted, maintained, and placed back.

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

[0056] Furthermore, the right fixing frame 500 has the same structure as the right receiving frame 300. The right fixing frame 500 includes a fourth frame body 510, a fourth semi-circular groove 520, a fourth fixing plate 530, a fourth insertion slot 511, and a fourth sliding groove 522. On the side of the third frame body 410 away from the right fixing frame 400, a second positioning post 540 is fixedly provided, and an upper limiting 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 commonly installed on the left fixing frame 400 and the right fixing frame 500. The reset mechanism includes two telescopic rods 910. At both ends inside the telescopic rods 910, second return springs are fixedly connected. The outer ends of the telescopic rods 910 respectively pass through the left fixing frame 400 and the right fixing frame 500, and the ends on the same side of the two telescopic rods 910 are fixedly connected together through a fixing bracket 920. The two telescopic rods 910 are located on both sides of the submarine cable 100. The fixing bracket 920 is fixedly connected to the corresponding upper limiting mechanism 800.

[0059] Through the structural design of the reset mechanism 900 of the present invention, under the action of the telescopic rods 910 and the second return springs, the fixing bracket 920 always fits the left fixing frame 400 and the right fixing frame 500. Since the fixing bracket 920 is fixedly connected to the corresponding upper limiting mechanism 800, when the left fixing frame 400 and the right fixing frame 500 slide relative to each other, the elastic curved panels corresponding to the upper limiting mechanism 800 will not extend out either. Overall, damage to the elastic curved panel 770 is avoided during the operations of taking out, repairing, and putting back the submarine cable 100. At the same time, when it is necessary for the elastic curved panel corresponding to the upper limiting mechanism 800 to extend out for limit protection, the fixing bracket 920 is pulled to make the elastic curved panel corresponding to the upper limiting mechanism 800 extend out and the limiting block abuts against the corresponding positioning post for limit, so as to keep the elastic curved panels on the left fixing frame 400 and the right fixing frame 500 in an extended state for long-term limit protection.

[0060] It should be noted that the acting force of the second return spring inside the telescopic rod 910 of the present invention can be adjusted conventionally, so as to avoid the relative contraction movement of the left fixed frame 400 and the right fixed frame 500 caused by excessive acting force, and no detailed description will be made here.

[0061] A method for installation and fixation using the above-mentioned installation, fixation, detection and repair equipment for offshore wind power submarine cables includes the following steps:

[0062] S1. Dive underwater to the location of the submarine cable to be repaired, clamp the left receiving frame 200 and the right receiving frame 300 at the bottom of the submarine cable 100, and 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 fixed frame 400 and the right fixed frame 500 to the corresponding lengths and buckle them above the submarine cable 100, and fix the left receiving frame 200 and the left fixed frame 400 and fix the right receiving frame 300 and the right fixed frame 500 through bolts;

[0064] S3. Lift the submarine cable at this location by a repair ship, cut off the damaged part from the top openings of the left fixed frame 400 and the right fixed frame 500, and rotate the bidirectional screw 600 to make the cut part close and welded. After completion, perform packaging and sealing treatment on the welding position;

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

[0066] It should be noted that the method of the present invention for packaging and sealing treatment can be by sleeving with a sealing tape or by sleeving with a metal sleeve, which is a conventional setting and no detailed description will be made here.

[0067] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the inventive concept of the present invention, several improvements and transformations can still be made, and these all belong to the protection scope of the present invention.

Claims

1. An installation, fixing, detection and maintenance device for offshore wind power cables, characterized in that: The cable comprises a left receiving frame (200), a right receiving frame (300), a left fixed frame (400) and a right fixed frame (500); the left receiving frame (200) and the right receiving frame (300) are slidably plugged; the left fixed frame (400) and the right fixed frame (500) are slidably plugged; the left receiving frame (200) and the right receiving frame (300) are located at the bottom of the submarine cable (100), and the left fixed frame (400) and the right fixed frame (500) are located at the top of the submarine cable (100), and jointly limit the submarine cable (100); the left receiving frame (200) and the left fixed frame (400) are fixedly installed by bolts; the right receiving frame (300) and the right fixed frame (500) are fixedly installed by bolts; The tops of the left fixing frame (400) and the right fixing frame (500) are open; the bottoms of the left supporting frame (200) and the right supporting frame (300) are both provided with threaded openings and are screwed together with a bidirectional screw (600).

2. According to claim 1, an installation, fixing, detection and maintenance device for offshore wind power cables is characterized in that: The left receiving frame (200) comprises a first frame body (210), and a side of the first frame body (210) away from the right receiving frame (300) is fixedly connected to a first semicircular groove (220) and a first fixing plate (230); the right receiving frame (300) comprises a second frame body (310), and a side of the second frame body (310) away from the left receiving frame (200) is fixedly connected to a second semicircular groove (320) and a second fixing plate (330); a side of the second frame body (310) close to the left receiving frame (200) is provided with a first plugging groove (311), and the first plugging groove (311) is plugged with the first frame body (210); and a submarine cable (100) is built into the first semicircular groove (220) and the second semicircular groove (320).

3. According to claim 1, an installation, fixing, detection and maintenance device for offshore wind power cables, characterized in that: The bidirectional screw (600) comprises a bidirectional screw body (610) with threads at the left and right ends in opposite directions, and both ends of the bidirectional screw body (610) are fixedly connected to a control knob (620) via a support shaft (621).

4. According to claim 2, an installation, fixing, detection and maintenance device for offshore wind power cables is characterized in that: The bottom of the first semicircular groove (220) and the bottom of the second semicircular groove (320) are both provided with a first sliding groove (222), and the side walls of the first semicircular groove (220) and the second semicircular groove (320) are both provided with a first telescopic groove (221), and 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 limit mechanism (700), and the lower limit mechanism (700) includes a limit ring (710) sleeved on the bidirectional screw (600), and the top of the limit ring (710) is connected to the bidirectional screw (600) by a connecting rod (760). ) is fixedly connected to an elastic curved panel (770), and the elastic curved panel (770) is located in the corresponding first telescopic groove (221); both sides of the limit ring (710) are fixedly connected to the limit plates (720), and a spring groove is provided on the limit plate (720), and the first slide bar (730) is slidably connected to the spring groove; the two ends of the first slide bar (730) are respectively fixedly connected to the limit protrusion (731) and the limit block (740), and the side of the limit block (740) close to the bidirectional screw (600) is a curved surface structure; the first slide bar (730) is sleeved with a limit spring (750).

5. The installation, fixing, detection and maintenance equipment for offshore wind power cables according to claim 4, characterized in that: Sliding holes are provided on both sides of the threaded openings of the left supporting frame (200) and the right supporting 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).

6. The installation, fixing, detection and maintenance equipment for offshore wind power cables according to claim 4, characterized in that: The left fixed frame (400) has the same structure as the left supporting frame (200), and the left fixed frame (400) comprises a third frame body (410), a third semicircular groove (420), a third fixed plate (430), a third telescopic groove (421) and a third sliding groove (422); a first positioning column (440) is fixedly provided on a side of the third frame body (410) away from the right fixed frame (500), and an upper limit mechanism (800) is sleeved on the first positioning column (440), and the upper limit mechanism (800) has the same structure as the lower limit mechanism (700).

7. The installation, fixing, detection and maintenance equipment for offshore wind power cables according to claim 6, characterized in that: The right fixed frame (500) has the same structure as the right supporting frame (300), and the right fixed frame (500) comprises a fourth frame body (510), a fourth semicircular groove (520), a fourth fixed plate (530), a fourth plugging groove (511) and a fourth sliding groove (522); a second positioning column (540) is fixedly provided on a 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 column (540).

8. The installation, fixing, detection and maintenance equipment for offshore wind power cables according to claim 7, characterized in that: The first fixing plate (230) and the third fixing plate (430) are fixedly installed by bolts; and the second fixing plate (330) and the fourth fixing plate (530) are fixedly installed by bolts.

9. The installation, fixing, detection and maintenance equipment for offshore wind power cables according to claim 7, characterized in that: The left fixed frame (400) and the right fixed frame (500) are jointly installed with a reset mechanism (900), and the reset mechanism comprises two telescopic rods (910), and the inner two ends of the telescopic rods (910) are fixedly connected to the second reset spring; the outer two ends of the telescopic rods (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 jointly fixedly connected by a fixed bracket (920); the two telescopic rods (910) are located on both sides of the submarine cable (100); and the fixed bracket (920) is fixedly connected to the corresponding upper limit mechanism (800).

10. A method for installing and fixing an offshore wind power cable using the installation, fixing, detection and maintenance equipment according to any one of claims 1 to 9, characterized in that: The steps include: S1, diving into the sea where the submarine cable to be repaired is located, clamping the left receiving frame (200) and the right receiving frame (300) at the bottom of the submarine cable (100), and rotating 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, stretching the left fixing frame (400) and the right fixing frame (500) to corresponding lengths and buckling them on the top of the submarine cable (100), fixing the left receiving frame (200) and the left fixing frame (400) and fixing the right receiving frame (300) and the right fixing frame (500) by bolts; S3, the submarine cable is lifted out by a maintenance ship, the damaged portion is cut off from the top openings of the left fixing frame (400) and the right fixing frame (500), and the cut portions are brought close together and welded by rotating the bidirectional screw (600), and after completion, the welding position is packaged and sealed; S4. Put the repaired submarine cable (100) under the sea, and pull the lower limit mechanism (700) and the upper limit mechanism (800) to extend the elastic curved panel (770), thereby completing the installation.

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