Single pile type offshore wind turbine cable integrated protection device

Abstract

The invention provides a single pile type offshore wind turbine cable integrated protection device, which comprises a cable suspension section protection assembly and a cable towing section protection assembly, and is characterized in that the cable suspension section protection assembly comprises an internal anti-bending device, an external anti-bending device and a spiral strake sleeve; the internal anti-bending device is connected with the external anti-bending device through barbs, and the spiral strake sleeve is connected with the external anti-bending device through a sleeve joint; the cable towing section protection assembly comprises an anti-abrasion sleeve and a balancing weight, the anti-abrasion sleeve is connected with the spiral strake sleeve, and the balancing weight is arranged on the anti-abrasion sleeve in a sleeving mode. According to the invention, the comprehensive protection of the cable is realized, the overall dynamic response and vortex-induced vibration response of the fan cable under the action of wave current can be effectively reduced, the wear of the cable is remarkably reduced, and the service life of the fan cable is prolonged.

Description

Technical Field

[0001] This invention relates to the field of marine engineering technology, specifically to an integrated protection device for monopile offshore wind turbine cables. Background Technology

[0002] In recent years, offshore wind power has become an important development direction for clean and renewable energy under the global vision of carbon neutrality, and wind turbine cables are key equipment for wind power transmission. However, due to the complex marine environment in which offshore wind farms are located, factors such as waves, tides, and ocean currents can cause significant overall dynamic responses and vortex-induced vibrations to wind turbine cables exposed in the ocean, leading to problems such as damage or loss of bending limiters and wear and breakage of the armor layer. This results in fatigue failure of the wind turbine cables, seriously affecting the stability and safety of wind power equipment. Proper cable protection can ensure the safety of wind turbine generators and transmission systems, guarantee the stable operation of wind power equipment, and is the most effective means to extend equipment life and reduce operating costs.

[0003] Existing patent document CN110190573A discloses a submarine cable protection device, which is sleeved on the outside of the submarine cable to protect it. It includes a clamp and a bend limiter. The clamp can be inserted into a wind turbine tower to secure the submarine cable. The clamp includes a main body and several claws. The main body has several grooves along its circumference, and the claws can be embedded in the grooves. Each claw includes a body and an elastic element fixed to the body. The body and the main body are rotatably connected, and the elastic element can contact the bottom wall of the groove to achieve assembly of the clamp and the wind turbine tower by deformation of the elastic element. The bend limiter includes a straight section and a bent end connected to the straight section, and the straight section is connected to the clamp.

[0004] Currently, the main protection method for offshore wind turbine cables is the installation of bend limiters. However, bend limiters are not only complex in structure and time-consuming to install, but their most significant drawback is that they only become effective after the cable has been bent to a certain extent, which does nothing to extend the cable's service life. Furthermore, since most offshore wind turbines are located in shallow waters near the coast, the overall dynamic response of the cable caused by waves and currents is more severe. This makes bend limiters prone to breakage, detachment, and loss of the central clamp, which can further lead to wear and breakage of the cable armor layer and even insulation layer damage, seriously affecting the safe operation of the unit. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide an integrated protection device for monopile offshore wind turbine cables.

[0006] According to the present invention, an integrated protection device for a monopile offshore wind turbine cable is provided, the protection device comprising a cable suspension section protection component and a cable dragging section protection component;

[0007] The cable suspension section protection assembly includes an internal anti-bend device, an external anti-bend device, and a spiral plate sleeve. The internal anti-bend device is connected to the external anti-bend device through barbs, and the spiral plate sleeve is connected to the external anti-bend device through a sleeve joint.

[0008] The cable dragging section protection component includes an anti-wear sleeve and a counterweight. The anti-wear sleeve is connected to a spiral plate sleeve, and the counterweight is fitted onto the anti-wear sleeve.

[0009] Preferably, the barb includes a front connector, a parallel middle section, a rear connector, and a buckle, wherein the parallel middle section is disposed between the front connector and the rear connector, and the buckle is disposed on the parallel middle section;

[0010] A spring is provided inside the barb, and the spring is connected to the buckle and assembled below the buckle.

[0011] Preferably, the internal anti-bending device includes a first body and a first connector, which are integrally formed.

[0012] The first main body includes a three-section variable cross-section hollow beam structure, which includes an inner curved first section, an inner curved second section, and an inner curved third section connected in sequence. The inner curved first section includes a cylinder, the inner curved second section includes a frustum, and the inner curved third section includes a cylinder. The inner curved first section and the inner curved second section are adapted to each other at one end, and the inner curved third section and the inner curved second section are adapted to each other at the other end. The diameter of the inner curved first section is larger than the diameter of the inner curved third section.

[0013] The first connector includes a cylinder and is connected to barbs.

[0014] Preferably, one end of the first connector is connected to the first section of the inner bend, and the other end of the first connector is inserted and connected to the front connector and fixed by the connecting flange.

[0015] Preferably, the external anti-bending device includes a second body and a second connector, the second body and the second connector being integrally formed;

[0016] The second main body includes a five-segment variable cross-section hollow beam structure, which includes a first outward bending segment, a second outward bending segment, a third outward bending segment, a fourth outward bending segment, and a fifth outward bending segment connected in sequence. The first outward bending segment includes a cylinder, the second outward bending segment includes a frustum, the third outward bending segment includes a cylinder, the fourth outward bending segment includes a frustum, and the fifth outward bending segment includes a cylinder. One end of the first outward bending segment is adapted to the second outward bending segment, one end of the third outward bending segment is adapted to the other end of the second outward bending segment, the other end of the third outward bending segment is adapted to one end of the fourth outward bending segment, and the fifth outward bending segment is adapted to the other end of the fourth outward bending segment. The diameters of the first outward bending segment, the third outward bending segment, and the fifth outward bending segment decrease sequentially.

[0017] The second connector includes a cylinder and is connected to barbs.

[0018] Preferably, the second connector includes a cylinder, one end of the second connector is connected to the first outwardly bent section, and the other end of the second connector is inserted and connected to the rear connector and fixed by a connecting flange.

[0019] Preferably, the spiral plate sleeve includes a housing and spiral plates, wherein the spiral plates are spirally arranged on the outer surface of the housing along the radial direction of the housing;

[0020] The spiral plate sleeve includes two hollow spiral plate sleeve halves, each half of which is provided with a first limiting pin and a first limiting groove, the first limiting pin and the first limiting groove being interlocked with each other;

[0021] The surface of the spiral plate sleeve is provided with a first groove, which is arranged along the transverse direction of the spiral plate sleeve, and the first groove contains a first cable tie.

[0022] One end of the spiral plate sleeve includes a first connector end, and the other end of the spiral plate sleeve includes a first insertion end, wherein the inner diameter of the first insertion end is larger than the outer diameter of the first connector end.

[0023] Preferably, the wear-resistant sleeve includes two hollow wear-resistant sleeve halves, each half of which is provided with a second limiting pin and a second limiting groove, the second limiting pin and the second limiting groove being interlocked with each other;

[0024] The surface of the wear-resistant sleeve is provided with a second groove, which is arranged along the transverse direction of the wear-resistant sleeve, and the second groove contains a second cable tie;

[0025] One end of the anti-wear sleeve includes a second connector end, and the other end of the anti-wear sleeve includes a second insertion end, wherein the inner diameter of the second insertion end is larger than the outer diameter of the second connector end.

[0026] Preferably, the counterweight includes two detachably connected hollow counterweight halves, which cooperate to form a through hole, and the through hole accommodates an anti-wear sleeve.

[0027] Preferably, the sleeve joint comprises two detachably connected hollow sleeve halves;

[0028] The surface of the sleeve joint is provided with a third groove, which is arranged along the transverse direction of the sleeve joint, and the third groove contains a third cable tie.

[0029] The sleeve connector is inserted into the external anti-bend device, and the end of the sleeve connector is fixedly connected to the spiral plate sleeve.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The monopile-type offshore wind turbine cable integrated protection device set up in this invention realizes all-round protection of the cable, which can effectively reduce the overall dynamic response and vortex-induced vibration response of the wind turbine cable under the action of waves and currents, significantly reduce cable wear, and extend the service life of the wind turbine cable.

[0032] 2. This invention effectively limits cable bending by setting internal and external anti-bend devices, ensuring that the cable curvature is always kept within an allowable range.

[0033] 3. The present invention can effectively suppress the eddy-induced vibration response of the cable under the action of wave current by setting the spiral plate bushing, thereby reducing the risk of fatigue damage;

[0034] 4. This invention can effectively reduce the swaying of the cable in the ground section by using anti-wear sleeves and counterweights, significantly reduce cable wear, improve cable service life, and thus reduce the corresponding operation and maintenance costs. Attached Figure Description

[0035] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0036] Figure 1 This mainly illustrates the three-dimensional structural diagram of the protective device of the present invention;

[0037] Figure 2 The main illustration shows the three-dimensional structure of the barbs;

[0038] Figure 3 This mainly shows a three-dimensional structural diagram of the internal anti-bend device;

[0039] Figure 4 This mainly shows a three-dimensional structural diagram of the external anti-bend device;

[0040] Figure 5This mainly shows a three-dimensional structural diagram of the connecting flange;

[0041] Figure 6 This mainly illustrates the three-dimensional structure of the sleeve joint;

[0042] Figure 7 The main feature is a three-dimensional structural diagram of the spiral plate sleeve;

[0043] Figure 8 This mainly illustrates the connection structure between the sleeve joint and the external anti-bend device, and the spiral plate sleeve;

[0044] Figure 9 This mainly shows a three-dimensional structural diagram of the wear-resistant sleeve;

[0045] Figure 10 This mainly shows a three-dimensional structural diagram of the counterweight.

[0046] As shown in the figure:

[0047] Internal anti-bend device 11, barb 12, spiral plate sleeve 15

[0048] Inward bend, first section 21; front joint 31; first limit pin 61

[0049] Inner bend, second section 22; parallel middle section 32; first limiting groove 62

[0050] Inward bend, third section 23, rear connector 33, first insertion end 63

[0051] First connector 24, barbed pin hole 34, first joint end 64

[0052] Inner bend pin hole 25, buckle 35, first groove 65

[0053] External anti-bend device 14, connecting flange 13, wear-resistant sleeve 16

[0054] Outer bend, first section 51, first bolt hole 41, second groove 71

[0055] Outer bend, second section 52; locating pin 42; second limiting groove 72

[0056] Outer bend, third section 53, counterweight 17, second limit pin 73

[0057] Outer bend, fourth section 54, hollow counterweight 81, second joint end 74

[0058] Outer bend, fifth section, 55; second bolt hole, 82; second insertion end, 75.

[0059] Second connector 56 sleeve fitting 91

[0060] Outer bend pin hole 57, third groove 92 Detailed Implementation

[0061] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0062] like Figure 1 As shown, an integrated cable protection device for a monopile offshore wind turbine according to the present invention includes a cable suspension section protection component and a cable dragging section protection component. The cable suspension section protection component includes an internal anti-bend device 11, an external anti-bend device 14, and a spiral plate sleeve 15. The internal anti-bend device 11 is connected to the external anti-bend device 14 via barbs 12, and the spiral plate sleeve 15 is connected to the external anti-bend device 14 via a sleeve joint 91. The cable dragging section protection component includes an anti-abrasion sleeve 16 and a counterweight 17. The anti-abrasion sleeve 16 is connected to the spiral plate sleeve 15, and the counterweight 17 is fitted onto the anti-abrasion sleeve 16.

[0063] The wind turbine cable protection device of the present invention comprises an internal anti-bend device 11, an external anti-bend device 14, a spiral plate sleeve 15, an anti-wear sleeve 16, and a counterweight 17 connected to form an integrated device. The internal anti-bend device 11 and the external anti-bend device 14 are respectively connected to both ends of the barbs 12. The internal and external anti-bend devices 11 and 14 are respectively arranged inside and outside the pile foundation and connected to the barbs 12, effectively limiting cable bending and ensuring that the cable curvature remains within an allowable range. The spiral plate sleeve 15 is fixed to the suspended section of the cable, effectively suppressing the eddy-induced vibration response of the cable under wave current action, thereby reducing the risk of fatigue damage. The anti-wear sleeve 16 and the counterweight 17 are fixed to the ground-dragging section of the cable, with the counterweight 17 mainly arranged in the rear half of the ground-dragging section. The combined use of the anti-wear sleeve 16 and the counterweight 17 effectively reduces the swaying of the cable in the ground-dragging section, significantly reducing cable wear, increasing cable service life, and thus reducing corresponding maintenance costs. The integrated wind turbine cable protection device of the present invention provides all-round protection for the cable, effectively reduces the overall dynamic response and vortex-induced vibration response of the wind turbine cable under the action of wave current, significantly reduces cable wear, and extends the service life of the wind turbine cable.

[0064] Specifically, such as Figure 2As shown, the barb 12 includes a front connector 31, a parallel middle section 32, a rear connector 33, and a buckle 35. The parallel middle section 32 is located between the front connector 31 and the rear connector 33, and the buckle 35 is located on the parallel middle section 32. A spring is installed inside the barb 12, and the spring is connected to the buckle 35 and assembled below the buckle 35. When the barb 12 is inserted into the pile foundation, the buckle 35 moves towards the spring under the pressure of the pile foundation. The spring connected to the buckle 35 is simultaneously compressed and contracts. After the barb 12 is inserted into the pile foundation, the rebound force generated by the contracted spring acts on the buckle 35, causing the buckle 35 to automatically rebound, thereby fixing the barb 12 to the pile foundation. The wind turbine cable is also fixed to the pile foundation along with the protective device.

[0065] Specifically, such as Figure 3 As shown, the internal anti-bending device 11 includes a first main body and a first connecting member 24, which are integrally formed. Preferably, the first connecting member 24 and the first main body are integrally cast during manufacturing. The first main body includes a three-section variable cross-section hollow beam structure, comprising an inner bending first section 21, an inner bending second section 22, and an inner bending third section 23 connected sequentially. The inner bending first section 21 includes a cylinder, the inner bending second section 22 includes a frustum, and the inner bending third section 23 includes a cylinder. One end of the inner bending first section 21 is adapted to the inner bending second section 22, and the other end of the inner bending third section 23 is adapted to the inner bending second section 22. The diameter of the inner bending first section 21 is larger than the diameter of the inner bending third section 23, with the inner bending first section 21 having the largest diameter. The first connecting member 24 includes a cylinder and is connected to barbs 12. Specifically, one end of the first connector 24 is connected to the inner bend first section 21, and the other end of the first connector 24 is inserted and connected to the front connector 31 and fixed by the connecting flange 13.

[0066] In the three-section variable cross-section hollow beam structure of the internal anti-bending device 11, the first inner bend 21 is adapted to one end of the second inner bend 22, and the third inner bend 23 is adapted to the other end of the second inner bend 22. The diameter of the first inner bend 21 is greater than the diameter of the third inner bend 23. This can be understood as follows: the diameter of the first inner bend 21 of the cylindrical structure is R1, the diameter of the third inner bend 23 of the cylindrical structure is R3, the diameter of one end of the second inner bend 22 of the frustum structure is R1, and the diameter of the other end of the second inner bend 22 is R3. R1 is greater than R3.

[0067] Specifically, such as Figure 4As shown, the external anti-bending device 14 includes a second body and a second connector 56. The second body and the second connector 56 are integrally formed. Preferably, the second connector 56 and the second body are integrally cast during the manufacturing process. The second main body comprises a five-segment variable cross-section hollow beam structure, consisting of sequentially connected outer bending segments 51, 52, 53, 54, and 55. Outer bending segment 51 is a cylinder, outer bending segment 52 is a frustum, outer bending segment 53 is a cylinder, outer bending segment 54 is a frustum, and outer bending segment 55 is a cylinder. One end of outer bending segment 51 is fitted to one end of outer bending segment 52, one end of outer bending segment 53 is fitted to the other end of outer bending segment 52, the other end of outer bending segment 53 is fitted to one end of outer bending segment 54, and outer bending segment 55 is fitted to the other end of outer bending segment 54. The diameters of outer bending segments 51, 53, and 55 decrease sequentially, with outer bending segment 51 having the largest diameter. A second connector 56 is a cylinder and is connected to barbs 12. Specifically, one end of the second connector 56 is connected to the first section 51 of the outward bend, and the other end of the second connector 56 is inserted into and connected to the rear connector 33 and fixed by the connecting flange 13.

[0068] In the five-segment variable cross-section hollow beam structure of the external anti-bending device 14, one end of the first external bending segment 51 is adapted to one end of the second external bending segment 52, one end of the third external bending segment 53 is adapted to the other end of the second external bending segment 52, the other end of the third external bending segment 53 is adapted to one end of the fourth external bending segment 54, and the fifth external bending segment 55 is adapted to the other end of the fourth external bending segment 54. The diameters of the first external bending segment 51, the third external bending segment 53, and the fifth external bending segment 55 decrease sequentially. This can be understood as follows: the diameter of the first external bending segment 51 of the cylindrical structure is L1, the diameter of the third external bending segment 53 of the cylindrical structure is L3, the diameter of the fifth external bending segment 55 of the cylindrical structure is L5, the diameter of one end of the second external bending segment 52 of the frustum structure is L1, the diameter of the other end of the second external bending segment 52 of the frustum structure is L3, the diameter of one end of the fourth external bending segment 54 of the frustum structure is L3, and the diameter of the other end of the fourth external bending segment 54 of the frustum structure is L5. L1 is greater than L3, and L3 is greater than L5.

[0069] More specifically, such as Figures 2 to 5As shown, the first connector 24 is inserted into the front connector 31 and fixed by the connecting flange 13, and the second connector 56 is inserted into the rear connector 33 and fixed by the connecting flange 13. One feasible implementation is as follows: the connecting flange 13 comprises two halves, each half having a first bolt hole 41 at its end, and each half having a locating pin 42 on its inner surface. The two halves of the connecting flange can be connected by inserting bolts into the first bolt holes 41, and the locating pins 42 of the two halves are arranged opposite each other. The front connector 31 is provided with a through barbed pin hole 34. The first connector 24 is a cylindrical structure. The first connector 24 is provided with a through inner bent pin hole 25. The inner bent pin hole 25 is set along the direction perpendicular to the axis of the first connector 24. When the front connector 31 is inserted into the first connector 24, the barbed pin hole 34 and the inner bent pin hole 25 overlap to form a through hole. The positioning pins 42 are inserted into the through hole from two opposite directions for positioning. The bolts are inserted into the first bolt hole 41 to fix the two half connecting flanges. After the first connector 24 and the front connector 31 are inserted, the fixed connection is completed. Similarly, the rear connector 33 is provided with a through barbed pin hole 34, and the second connector 56 is a cylindrical structure with a through externally bent pin hole 57. The externally bent pin hole 57 is arranged in a direction perpendicular to the axis of the second connector 56. When the rear connector 33 is inserted into the second connector 56, the barbed pin hole 34 and the externally bent pin hole 57 overlap to form a through hole. The positioning pins 42, which are arranged oppositely, are inserted into the through hole from two opposite directions for positioning. Bolts are inserted into the first bolt hole 41 to fix and connect the two halves of the connecting flange. After the second connector 56 and the rear connector 33 are inserted, the fixed connection is completed. In this way, the internal anti-bending device 11 and the external anti-bending device 14 are connected by barbs 12.

[0070] Specifically, such as Figure 6 As shown, the sleeve connector 91 includes two detachably connected hollow sleeve connectors. A third groove 92 is provided on the surface of the sleeve connector 91, and the third groove 92 is arranged in the transverse direction of the sleeve connector 91. The third groove 92 accommodates a third cable tie, which can be used to bind and fix the cable tie to the cable surface. The sleeve connector 91 is inserted into the external anti-bend device 14, and the end of the sleeve connector 91 is fixedly connected to the spiral plate sleeve 15. A preferred configuration of the sleeve connector 91 is as follows: the head end of the sleeve connector inserted into the external anti-bend device 14 includes a conical structure to facilitate insertion of the sleeve connector 91 into the external anti-bend device 14; the end of the sleeve connector 91 connecting to the spiral plate sleeve 15 includes a cylindrical structure to facilitate insertion of the sleeve connector 91 into the spiral plate sleeve 15; and the middle part of the sleeve connector 91 with the third groove 92 includes a cylindrical structure with its largest diameter.

[0071] Specifically, such as Figure 7As shown, the spiral plate sleeve 15 includes a shell and spiral plates. The spiral plates are spirally arranged on the outer surface of the shell along the radial direction. Preferably, the shell is a cylindrical shell, and three spiral plates are evenly spirally arranged at 120° intervals on the surface of the cylindrical shell. The cross-section of the spiral plates along the radial direction of the cylindrical shell is trapezoidal. The spiral plate sleeve 15 includes two hollow helical plate sleeves 15. Each hollow helical plate sleeve 15 is provided with a first limiting pin 61 and a first limiting groove 62. The first limiting pin 61 and the first limiting groove 62 are interlocked, and the two hollow helical plate sleeves are fastened together. During the fastening process, the first limiting pin 61 and the first limiting groove 62 are interlocked. The surface of the spiral plate sleeve 15 is provided with a first groove 65, which is arranged in the transverse direction of the spiral plate sleeve 15. The first groove 65 accommodates a first cable tie. Preferably, the first grooves 65 are evenly spaced on the surface of the spiral plate sleeve 15, and are arranged in the transverse direction of the spiral plate sleeve 15, for fastening the two halves of the spiral plate to the cable surface by the first cable tie. One end of the spiral plate sleeve 15 includes a first connector end 64, and the other end includes a first insertion end 63. The inner diameter of the first insertion end 63 is larger than the outer diameter of the first connector end 64. The larger inner diameter of the first insertion end 63 and the smaller outer diameter of the first connector end 64 ensure that adjacent spiral plate sleeves can be connected by insertion, and multiple spiral plate sleeves 15 can be connected sequentially by insertion. Figure 8 As shown, during assembly, the sleeve connector 91 is inserted into the external anti-bend device 14, the spiral plate sleeve 15 is inserted into the end of the sleeve connector 91, and is fastened to the end of the sleeve connector 91 by the first cable tie.

[0072] Specifically, such as Figure 9As shown, the anti-wear sleeve 16 includes two hollow anti-wear sleeve halves. Each hollow anti-wear sleeve halves are provided with a second limiting pin 73 and a second limiting groove 72. The second limiting pin 73 and the second limiting groove 72 are interlocked. The anti-wear sleeve 16 is composed of two hollow anti-wear sleeve halves fastened together. Each half of the anti-wear sleeve is equipped with a hemispherical second limiting pin 73 and a second limiting groove 72. During the fastening process, the second limiting pin 73 and the second limiting groove 72 are interlocked. The surface of the anti-wear sleeve 16 is provided with a second groove 71. The second groove 71 is arranged along the transverse direction of the anti-wear sleeve 16. The second groove 71 contains a second cable tie. Preferably, the second grooves 71 are equally spaced on the surface of the anti-wear sleeve 16. The second grooves 71 are arranged along the transverse direction of the anti-wear sleeve 16 and are used to fasten the two halves of the anti-wear sleeve 16 to the cable surface by the second cable tie. One end of the anti-wear sleeve 16 includes a second connector end 74, and the other end of the anti-wear sleeve 16 includes a second insertion end 75. The inner diameter of the second insertion end 75 is larger than the outer diameter of the second connector end 74. The inner diameter of the second insertion end 75 is larger and the outer diameter of the second connector end 74 is smaller, so as to ensure that two adjacent anti-wear sleeves 16 can be connected by insertion. Multiple anti-wear sleeves 16 can be connected sequentially by insertion. The anti-wear sleeve 16 located at the first end is inserted and connected to the spiral plate sleeve 15 located at the tail end.

[0073] To ensure a stable connection between the spiral plate sleeve 15 and the anti-wear sleeve 16, it is preferable that the spiral plate sleeve 15 and the anti-wear sleeve 16 have similar configurations, with the first connector end 64 of the spiral plate sleeve 15 and the second connector end 74 of the anti-wear sleeve 16 having similar structural configurations, as well as the first insertion end 63 of the spiral plate sleeve 15 and the second insertion end 75 of the anti-wear sleeve 16. This ensures that the second connector end 74 of the anti-wear sleeve 16 and the first insertion end 63 of the spiral plate sleeve 15 can be inserted and connected, and / or the second insertion end 75 of the anti-wear sleeve 16 and the first interface end of the spiral plate sleeve 15 can be inserted and connected.

[0074] Specifically, such as Figure 10 As shown, the counterweight 17 includes two detachably connected hollow counterweight blocks 81. The two hollow counterweight blocks 81 cooperate to form a through hole, which accommodates the anti-wear sleeve 16. Preferably, a second bolt hole 82 is provided on the counterweight block 17, and the two hollow counterweight blocks 81 are fitted onto the anti-wear sleeve 16, with the two hollow counterweight blocks 81 connected by bolts. The counterweight block 17 is mainly concentrated on the rear half of the floor-draping section of the protective device. The combined use of the counterweight block 17 and the anti-wear sleeve 16 can effectively reduce the swaying of the cable in the floor-draping section, significantly reduce cable wear, improve cable service life, and thus reduce the corresponding maintenance costs.

[0075] The dimensions or number of the internal anti-bend device 11, barb 12, external anti-bend device 14, spiral plate sleeve 15, anti-wear sleeve 16, counterweight 17, and sleeve joint 91 of the present invention are determined by the specific parameters of the cable being protected.

[0076] The integrated protective device of this invention differs from existing wind turbine cable protective devices. It primarily uses an internal anti-bend device 11 and an external anti-bend device 14 in the anti-bend section to restrict cable bending, keeping the cable curvature within a reasonable range and preventing significant bending under harsh sea conditions. No anti-bend limiters are installed in the suspended and ground-dragging sections. The installation of a spiral plate sleeve 15 in the suspended section significantly reduces the overall dynamic response and vortex-induced vibration response of the cable. The installation of an anti-wear sleeve 16 and a counterweight 17 in the ground-dragging section effectively reduces cable sway and significantly reduces cable wear. Since the spiral plate sleeve 15 and anti-wear sleeve 16 do not need to restrict cable bending, their diameters can be smaller than those of existing bending limiters. The spiral plate sleeve 15 and anti-wear sleeve 16 experience less resistance, resulting in smaller movement amplitudes under vortex-induced vibration and harsh sea conditions, which helps reduce cable wear and improve cable service life. The integrated protective device of this invention can provide effective protection for wind turbine cables under harsh sea conditions, while also protecting the cables, reducing wear and tear on the seabed during movement, improving the safety of offshore wind farm cables, and reducing the operation and maintenance costs of offshore wind power facilities.

[0077] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0078] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. An integrated protection device for monopile offshore wind turbine cables, characterized in that, The protective device includes a cable suspension section protection component and a cable dragging section protection component; The cable suspension section protection assembly includes an internal anti-bend device (11), an external anti-bend device (14), and a spiral plate sleeve (15). The internal anti-bend device (11) is connected to the external anti-bend device (14) through barbs (12), and the spiral plate sleeve (15) is connected to the external anti-bend device (14) through a sleeve joint (91). The cable drag section protection component includes an anti-wear sleeve (16) and a counterweight (17). The anti-wear sleeve (16) is connected to the spiral plate sleeve (15), and the counterweight (17) is sleeved on the anti-wear sleeve (16).

2. The monopile-type offshore wind turbine cable integrated protection device as described in claim 1, characterized in that, The barb (12) includes a front connector (31), a parallel middle section (32), a rear connector (33), and a buckle (35). The parallel middle section (32) is disposed between the front connector (31) and the rear connector (33), and the buckle (35) is disposed on the parallel middle section (32). A spring is provided inside the barb (12), and the spring is connected to the buckle (35) and assembled below the buckle (35).

3. The monopile-type offshore wind turbine cable integrated protection device as described in claim 2, characterized in that, The internal anti-bending device (11) includes a first main body and a first connecting member (24), which are integrally formed; The first main body includes a three-section variable cross-section hollow beam structure, which includes an inner curved first section (21), an inner curved second section (22), and an inner curved third section (23) connected in sequence. The inner curved first section (21) includes a cylinder, the inner curved second section (22) includes a frustum, and the inner curved third section (23) includes a cylinder. The inner curved first section (21) is adapted to one end of the inner curved second section (22), and the inner curved third section (23) is adapted to the other end of the inner curved second section (22). The diameter of the inner curved first section (21) is larger than the diameter of the inner curved third section (23). The first connector (24) includes a cylinder and is connected to a barb (12).

4. The monopile-type offshore wind turbine cable integrated protection device as described in claim 3, characterized in that, One end of the first connector (24) is connected to the first section (21) of the inner bend, and the other end of the first connector (24) is inserted and connected to the front connector (31) and fixed by the connecting flange (13).

5. The monopile-type offshore wind turbine cable integrated protection device as described in claim 2, characterized in that, The external anti-bend device (14) includes a second main body and a second connecting member (56), which are integrally formed; The second main body includes a five-segment variable cross-section hollow beam structure, which includes a first outward bending segment (51), a second outward bending segment (52), a third outward bending segment (53), a fourth outward bending segment (54), and a fifth outward bending segment (55) connected in sequence. The first outward bending segment (51) includes a cylinder, the second outward bending segment (52) includes a frustum, the third outward bending segment (53) includes a cylinder, the fourth outward bending segment (54) includes a frustum, and the fifth outward bending segment (55) includes... A cylinder, wherein one end of the first outward bend (51) is adapted to one end of the second outward bend (52), one end of the third outward bend (53) is adapted to the other end of the second outward bend (52), the other end of the third outward bend (53) is adapted to one end of the fourth outward bend (54), and the fifth outward bend (55) is adapted to the other end of the fourth outward bend (54). The diameters of the first outward bend (51), the third outward bend (53), and the fifth outward bend (55) decrease sequentially. The second connector (56) includes a cylinder and is connected to a barb (12).

6. The integrated cable protection device for monopile offshore wind turbines as described in claim 5, characterized in that, The second connector (56) includes a cylinder. One end of the second connector (56) is connected to the first outward bend (51), and the other end of the second connector (56) is inserted into the rear connector (33) and fixed by the connecting flange (13).

7. The monopile-type offshore wind turbine cable integrated protection device as described in claim 1, characterized in that, The spiral plate sleeve (15) includes a shell and a spiral plate, which is spirally arranged on the outer surface of the shell along the radial direction of the shell; The spiral plate sleeve (15) includes two hollow spiral plate sleeves, each hollow spiral plate sleeve is provided with a first limiting pin (61) and a first limiting groove (62), the first limiting pin (61) and the first limiting groove (62) are fitted together; The surface of the spiral plate sleeve (15) is provided with a first groove (65), the first groove (65) is provided along the transverse direction of the spiral plate sleeve (15), and the first groove (65) contains a first cable tie; One end of the spiral plate sleeve (15) includes a first connector end (64), and the other end of the spiral plate sleeve (15) includes a first insertion end (63), wherein the inner diameter of the first insertion end (63) is greater than the outer diameter of the first connector end (64).

8. The monopile-type offshore wind turbine cable integrated protection device as described in claim 1, characterized in that, The wear-resistant sleeve (16) includes two hollow wear-resistant sleeve halves. Each hollow wear-resistant sleeve halves are provided with a second limiting pin (73) and a second limiting groove (72). The second limiting pin (73) and the second limiting groove (72) are interlocked. The surface of the anti-wear sleeve (16) is provided with a second groove (71), the second groove (71) is provided along the transverse direction of the anti-wear sleeve (16), and the second groove (71) contains a second cable tie; One end of the anti-wear sleeve (16) includes a second connector end (74), and the other end of the anti-wear sleeve (16) includes a second insertion end (75), the inner diameter of the second insertion end (75) being larger than the outer diameter of the second connector end (74).

9. The monopile-type offshore wind turbine cable integrated protection device as described in claim 1, characterized in that, The counterweight (17) includes two detachably connected hollow counterweights (81), which cooperate to form a through hole, and the through hole accommodates the wear-resistant sleeve (16).

10. The monopile-type offshore wind turbine cable integrated protection device as described in claim 1, characterized in that, The sleeve joint (91) includes two detachably connected hollow sleeve joints. The surface of the sleeve joint (91) is provided with a third groove (92), the third groove (92) is provided along the transverse direction of the sleeve joint (91), and the third groove (92) contains a third cable tie; The sleeve connector (91) is inserted into the external anti-bend device (14), and the end of the sleeve connector (91) is fixedly connected to the spiral plate sleeve (15).

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