Wave Compensation System for Floating Wind Turbines

Abstract

The present invention discloses a wave compensation system for a floating wind turbine, belonging to the field of offshore wind power generation. It includes a dynamic cable, a sealed anchor, a bending reinforcement, a counterweight, an anti-wear protection pipe, a seabed fixing device, a bending limiter, a central limiting device, and a platform anchor. A plurality of groups of distributed buoyancy blocks are arranged on the outer periphery of the dynamic cable, and a seabed fixing device is provided between each adjacent two groups of distributed buoyancy blocks. Anti-wear protection pipes are sleeved on the outer periphery of the dynamic cable between the counterweight and the distributed buoyancy blocks, between each adjacent two groups of distributed buoyancy blocks, and between the buried section of the submarine cable and the distributed buoyancy blocks. The dynamic cable in the present invention adopts a "double hump" structure design. When the floating platform of the floating wind turbine has too large an offset, it can ensure that there is sufficient cable length reserve when the cable body of the dynamic cable is in a far-away working condition, so as not to break the cable body. When in a close working condition, the dynamic cable is affected by buoyancy and will not collapse onto the seabed.

Description

Technical Field

[0001] The present invention relates to the field of offshore wind power generation, and more specifically, to a wave compensation system for floating wind turbines. Background Art

[0002] The scale of offshore wind power is huge. The large-scale development of offshore wind power will become one of the important ways to adjust the national energy structure and achieve the goals of energy conservation and emission reduction. The wind resources in deep waters are much higher than those in shallow waters. Moreover, the construction of deep-water fixed pile foundations is difficult and costly. Therefore, the application research of floating wind turbines is imperative. A floating wind turbine can float on the sea surface. Its principle is to install a wind turbine generator on an offshore floating platform and then connect the floating platform to the seabed through anchor cables, so that the floating wind turbine can drift within a small range. The construction cost of floating wind power is low, which overcomes the problem of seabed geological conditions and enables the expansion of offshore wind power to the deep sea and the open ocean.

[0003] When the existing floating wind turbines float on the sea surface, due to the three-point mooring positioning of their floating platforms, they will move back and forth within a certain range under the action of tides and waves. In the case of large offset amounts, shallow waters, and possible torsion of the platform, the floating platform of the floating wind turbine has an excessive floating body offset amount. Therefore, the dynamic cable will be pulled multiple times, and in severe cases, the dynamic cable used for power transmission may be pulled off, posing a great safety hazard and seriously affecting the normal power transmission work of the floating wind turbine. For this reason, we propose a wave compensation system for floating wind turbines to overcome the above-mentioned defects. Summary of the Invention

[0004] 1. Technical Problems to be Solved

[0005] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a wave compensation system for floating wind turbines. In the present invention, the dynamic cable adopts a "double hump" structure design. When the floating platform of the floating wind turbine has an excessive offset amount, it can ensure that when the cable body of the dynamic cable is in a far-away working condition, there is enough cable length reserve and the cable body will not be pulled off. When in a close working condition, the dynamic cable is affected by buoyancy and will not collapse onto the seabed.

[0006] 2. Technical Solutions

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] Wave compensation system for floating wind turbines, including dynamic cables, sealed anchoring, bending reinforcement, counterweight blocks, anti-wear protection pipes, subsea fixing devices, bending limiters, central limiting devices, and platform anchoring. Multiple groups of distributed buoyancy blocks are arranged on the outer periphery of the dynamic cables. Subsea fixing devices are provided between every two adjacent groups of distributed buoyancy blocks. A wire rope is connected between the subsea fixing device and the dynamic cable. The sealed anchoring is fixedly connected to one end of the dynamic cable. The platform anchoring is fixed to the other end of the dynamic cable. The central limiting device is sleeved on the outer periphery of the dynamic cable near the platform anchoring end. The bending reinforcement is sleeved on the outer periphery of the dynamic cable near the sealed anchoring end. The bending limiter is sleeved on the outer periphery of the dynamic cable near the central limiting device side, and the bending limiter is connected to the central limiting device. The counterweight block is sleeved and fixed on the outer periphery of the dynamic cable. There is a section of subsea cable burial section on the side of the dynamic cable near the bending limiter;

[0009] Anti-wear protection pipes are sleeved on the outer periphery of the dynamic cable between the counterweight block and the distributed buoyancy blocks, between every two adjacent groups of distributed buoyancy blocks, and between the subsea cable burial section and the distributed buoyancy blocks.

[0010] Furthermore, the distributed buoyancy block is composed of multiple buoyancy block components. The buoyancy block component includes a right hoop and a left hoop. The end of the right hoop is hinged to the end of the left hoop. The right hoop and the left hoop are connected by a snap part. Installation straight grooves are horizontally penetrated on both the right hoop and the left hoop. An over-surplus buoyancy mechanism is provided inside each installation straight groove.

[0011] Furthermore, the over-surplus buoyancy mechanism includes a horizontally arranged cylinder. A connecting frame is sleeved and fixed on the outer periphery of the horizontally arranged cylinder, and the connecting frame is fixedly connected to the corresponding installation straight groove. The end of the horizontally arranged cylinder communicates with a bladder. The inside of the bladder is filled with a first gas part. A V-shaped folding part is provided on the side of the bladder, and a return spring B is connected between two adjacent V-shaped folding parts. A first sealing piston is movably arranged on the side of the horizontally arranged cylinder near the bladder. A second sealing piston is also movably arranged on the side of the horizontally arranged cylinder away from the bladder. The inside of the horizontally arranged cylinder is filled with a hydraulic oil part. A third gas part is also filled in the horizontally arranged cylinder. A plurality of telescopic springs are evenly connected to the side wall of the inner cavity of the horizontally arranged cylinder near the bladder, and the side of the telescopic spring away from the inner wall of the horizontally arranged cylinder is connected to the side wall of the first sealing piston. A second gas part is filled in the inner cavity of the horizontally arranged cylinder;

[0012] A guiding opening is horizontally formed at one end of the horizontally arranged cylinder body far away from the bladder body. A sealing ring is connected inside the guiding opening. A horizontally arranged guiding rod is connected to the position corresponding to the guiding opening on the side of the second sealing piston far away from the hydraulic oil part. One end of the horizontally arranged guiding rod far away from the second sealing piston passes through the sealing ring and extends out of the interior of the horizontally arranged cylinder body and is connected with a clamping block. A plurality of anti-slip ridges are evenly connected to the curved surface of the side of the clamping block far away from the horizontally arranged guiding rod.

[0013] A plurality of reflux filling components are evenly arranged on the side wall of the horizontally arranged cylinder body corresponding to the position of the third gas part. A vertically arranged air guiding pipe is communicated with each reflux filling component on the side wall of the bladder body close to the connected horizontally arranged cylinder body. The end of the air guiding pipe far away from the bladder body is communicated with a hollow box body.

[0014] Further, the hydraulic oil part is located between the first sealing piston and the second sealing piston. The third gas part is located between the second sealing piston and the side wall of the inner cavity of the horizontally arranged cylinder body far away from the bladder body. The second gas part is located between the first sealing piston and the side wall of the inner cavity of the horizontally arranged cylinder body close to the bladder body.

[0015] Further, the reflux filling component includes a hollow box body. Baffles are connected to the left and right sides of the bottom wall of the inner cavity of the hollow box body. L-shaped air flow channels are formed on both baffles. The horizontal opening of the L-shaped air flow channel faces the solid sphere. The vertical opening of the L-shaped air flow channel faces the top wall of the inner cavity of the hollow box body. A solid sphere is arranged between the two baffles, and the distance between the two baffles is the same as the diameter size of the solid sphere. An air supply pipe body is communicated with the outer wall of the hollow box body corresponding to the position of the solid sphere. When the solid sphere is in the initial position, it blocks the opening end of the air supply pipe body. A horizontal rod body is connected inside the air supply pipe body. A columnar vertical hole is vertically formed through the horizontal rod body. A bottom connecting guiding rod is connected to the outer wall of the solid sphere close to the air supply pipe body corresponding to the position of the columnar vertical hole. One end of the bottom connecting guiding rod far away from the solid sphere penetrates through the columnar vertical hole on the horizontal rod body. Conducting long pipes are communicated with the left and right sides of the top surface of the hollow box body.

[0016] Further, a reset device is arranged above the solid sphere. The reset device includes two sliding blocks which are symmetrically arranged left and right. Reset springs A are connected to the opposite surfaces of the two sliding blocks. Smooth inclined surfaces are formed on the opposite surfaces of the two sliding blocks.

[0017] One sliding block is attached to the surface of each baffle, and the opposite ends of the two reset springs A are attached to the side walls of the inner cavity of the hollow box body.

[0018] Further, the end of the air supply pipe body far away from the hollow box body is communicated with the side wall of the horizontally arranged cylinder body.

[0019] Further, positioning bumps adapted to the inner diameter size thereof are inserted at the backs of both ends of the reset spring A, and one of the positioning bumps is connected to the side wall of the sliding block, and the other positioning bump is connected to the side wall of the inner cavity of the hollow box body.

[0020] Further, one end of the conduction long tube away from the hollow box body is communicated with the hollow box body.

[0021] Further, the two smooth inclined surfaces are located above the solid sphere, and the outer wall of the solid sphere is attached to the two smooth inclined surfaces.

[0022] 3. Beneficial effects

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

[0024] (1) The right hoop and the left hoop are sleeved on the outer periphery of the dynamic cable, and the right hoop and the left hoop are fixed at the end by the buckle part. After the dynamic cable is placed in seawater, under the combined action of the subsea fixing device, the distributed buoyancy blocks, the counterweight blocks and the subsea cable buried section, the dynamic cable forms a "double-hump" shape in seawater. The dynamic cable in the present invention adopts a "double-hump" structure design. When the floating platform of the floating wind turbine has too large an offset, when the cable body of the dynamic cable is far from the working condition, there is enough cable length reserve so as not to break the cable body. When in the near working condition, the dynamic cable is affected by the buoyancy force and will not collapse onto the seabed.

[0025] (2) After the right hoop and the left hoop are tightened on the outer periphery of the dynamic cable, under the action of the telescopic spring connected inside the horizontal cylinder, the clamping block realizes secondary clamping and fixing of the dynamic cable. When the distributed buoyancy block is in seawater, the pressure in the seawater will squeeze the bladder, so that the first gas part inside the bladder is squeezed into the horizontal cylinder. Subsequently, the air pressure at the second gas part increases and pushes the clamping block towards the dynamic cable and further clamps the dynamic cable clamped by the right hoop and the left hoop, so that the buoyancy block components constituting the distributed buoyancy block can be firmly fixed on the outer periphery of the dynamic cable to avoid falling off, so that the distributed buoyancy block can stably exert the buoyancy force on the dynamic cable, so that the power cable can continuously maintain the "double-hump" shape. On the premise of meeting the offset of the floating platform of the floating wind turbine, it can also avoid interference and collision with the anchor chain and the seabed.

[0026] (3) When the self-weight of the distributed buoyancy block increases and it sinks due to marine organisms on the surface of the distributed buoyancy block immersed in seawater, since the deeper the distributed buoyancy block is immersed in seawater, the greater the pressure exerted by the seawater on the distributed buoyancy block, the greater the amount of compression deformation of the bladder, causing the first sealing piston to further push the second sealing piston. Since the clamping block is closely attached to the outer periphery of the dynamic cable and is difficult to move further, the third gas part is squeezed by the second sealing piston, increasing the internal air pressure of the air supply pipe body and pushing the solid sphere to move away from the opening of the air supply pipe body. Subsequently, the third gas part is introduced into the bladder through the conduction long pipe, causing the bladder to expand in volume and driving the dynamic cable to float again, preventing the system from being pulled down to the seabed, which is conducive to further maintaining the "double hump" shape of the dynamic cable in the present invention;

[0027] (4) When the clamping block clamps the dynamic cable, the compressible second gas part and third gas part act as an air spring, enabling the second sealing piston to slow down and buffer the impact force of the clamping block on the dynamic cable when pushing the clamping block to clamp and reinforce the dynamic cable, so that the clamping block can effectively prevent damage to the outer wall of the cable while clamping and fixing the dynamic cable. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0029] Figure 2 is a schematic side view structural diagram of the distributed buoyancy block in the present invention;

[0030] Figure 3 is a partial sectional view schematic diagram of the distributed buoyancy block in the present invention;

[0031] Figure 4 for the present invention Figure 3 is a partial enlarged schematic diagram at A in the present invention;

[0032] Figure 5 for the present invention Figure 3 is a partial enlarged schematic diagram at C in the present invention;

[0033] Figure 6 for the present invention Figure 3 is a partial enlarged schematic diagram at B in the present invention;

[0034] Figure 7 is a three-dimensional structural schematic diagram of the hollow box body in the present invention;

[0035] Figure 8 is a three-dimensional structural schematic diagram of the sliding block in the present invention;

[0036] Figure 9 is a pictorial change schematic diagram of the solid sphere pushing two sliding blocks to move horizontally when the internal air pressure of the air supply pipe body increases in the present invention;

[0037] Figure 10 This is a schematic three-dimensional structure diagram of the clamping block in the present invention.

[0038] Explanation of the reference numerals in the figure:

[0039] 1. Sealing and anchoring; 2. Bending reinforcement; 3. Counterweight; 4. Abrasion protection pipe; 5. Distributed buoyancy blocks; 501. Right hoop; 502. Left hoop; 503. Buckle part; 50400. Horizontal cylinder; 50401. Bladder; 50402. First gas part; 50403. Return spring B; 50404. Second gas part; 50405. First sealing piston; 50406. Hydraulic oil part; 50407. Second sealing piston; 50408. Clamping block; 50409. Third gas part; 50410. Hollow box body; 50411. Conducting long pipe; 50412. Air supply pipe body; 50413. Solid sphere; 50414. Bottom connecting and guiding rod; 50415. Hollow box body; 50416. Baffle; 50417. Sliding block; 50418. Return spring A; 50419. Positioning convex block; 50420. Anti-slip convex strip; 6. Submarine fixing device; 7. Submarine cable buried section; 8. Bending limiter; 9. Central limiting device; 10. Platform anchoring. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, terms such as "installation", "provided with", "sheathed / connected", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0043] Embodiment:

[0044] Please refer to Figure 1 As shown, the wave compensation system for a floating wind turbine includes a dynamic cable, a sealed anchor 1, a bending reinforcement 2, a counterweight 3, an anti-abrasion protection tube 4, a seabed fixing device 6, a bending limiter 8, a central limiting device 9, and a platform anchor 10. The sealed anchor 1 is fixed on the floating platform, and the platform anchor 10 is fixed on the fixed wind power platform near the coast. Both the bending limiter 8 and the bending reinforcement 2 are mechanisms for protecting the end of the dynamic cable, preferably a protective sleeve made of soft polyurethane material. The central limiting device 9 is used to limit the dynamic cable to prevent large-range swaying of the dynamic cable, preferably a sleeve made of soft polyurethane material. Multiple groups of distributed buoyancy blocks 5 are arranged on the outer periphery of the dynamic cable. A seabed fixing device 6 is provided between every two adjacent groups of distributed buoyancy blocks 5, and a wire rope is connected between the seabed fixing device 6 and the dynamic cable. The sealed anchor 1 is fixedly connected to one end of the dynamic cable, and the platform anchor 10 is fixed to the other end of the dynamic cable. The central limiting device 9 is sleeved on the outer periphery of the dynamic cable near the platform anchor 10 end. The bending reinforcement 2 is sleeved on the outer periphery of the dynamic cable near the sealed anchor 1 end. The bending limiter 8 is sleeved on the outer periphery of the dynamic cable near the central limiting device 9 side, and the bending limiter 8 is connected to the central limiting device 9. The counterweight 3 is sleeved and fixed on the outer periphery of the dynamic cable. A section of seabed cable burial section 7 is provided on the side of the dynamic cable near the bending limiter 8. Anti-abrasion protection tubes 4 are sleeved on the outer peripheries of the dynamic cable between the counterweight 3 and the distributed buoyancy blocks 5, between every two adjacent groups of distributed buoyancy blocks 5, and between the seabed cable burial section 7 and the distributed buoyancy blocks 5.

[0045] Please refer to Figures 1-3As shown, the distributed buoyancy block 5 is composed of multiple buoyancy block components. The buoyancy block component includes a right hoop 501 and a left hoop 502. The end of the right hoop 501 is hinged to the end of the left hoop 502. The right hoop 501 and the left hoop 502 are connected by a snap part 503. The snap part 503 is a prior art mechanism for the embedded connection or overall locking of one part to another part, and is usually used for the connection of plastic parts. Its material is usually composed of a plastic material with a certain flexibility, which will not be elaborated here. Installation straight grooves are horizontally penetrated on both the right hoop 501 and the left hoop 502, and an over-surplus buoyancy mechanism is provided inside each installation straight groove. The right hoop 501 and the left hoop 502 are sleeved on the outer periphery of the dynamic cable, and the ends of the right hoop 501 and the left hoop 502 are fixed through the snap part 503. After the dynamic cable is placed in seawater, under the combined action of the seabed fixing device 6, the distributed buoyancy block 5, the counterweight block 3, and the submarine cable buried section 7, the dynamic cable forms a "double-hump" shape in seawater. The dynamic cable in the present invention adopts a "double-hump" structure design. When the floating platform of the floating wind turbine has an excessive offset, it can ensure that there is enough cable length reserve when the cable body of the dynamic cable is away from the working condition, so as not to break the cable body. When in the near working condition, the dynamic cable is affected by buoyancy and will not collapse onto the seabed.

[0046] Please refer to Figure 3 , Figure 4As shown in the figure, the excess buoyancy mechanism includes a horizontally arranged cylinder body 50400. A connecting frame is sleeved and fixed on the outer periphery of the horizontally arranged cylinder body 50400, and the connecting frame is fixedly connected to the corresponding installation straight groove. The end of the horizontally arranged cylinder body 50400 is communicated with a bladder 50401. The inside of the bladder 50401 is filled with a first gas part 50402. A V-shaped folding part is arranged on the side of the bladder 50401, and a return spring B 50403 is connected between two adjacent V-shaped folding parts. A first sealing piston 50405 is movably arranged on one side of the horizontally arranged cylinder body 50400 close to the bladder 50401, and a second sealing piston 50407 is also movably arranged on the side of the horizontally arranged cylinder body 50400 far from the bladder 50401. The inside of the horizontally arranged cylinder body 50400 is filled with a hydraulic oil part 50406, and a third gas part 50409 is also filled in the horizontally arranged cylinder body 50400. A plurality of telescopic springs are evenly connected to the side wall of the inner cavity of the horizontally arranged cylinder body 50400 close to the bladder 50401, and the side of the telescopic spring far from the inner wall of the horizontally arranged cylinder body 50400 is connected to the side wall of the first sealing piston 50405. A second gas part 50404 is filled in the inner cavity of the horizontally arranged cylinder body 50400. A guiding opening is horizontally opened at one end of the horizontally arranged cylinder body 50400 far from the bladder 50401. A sealing ring is connected in the guiding opening. A horizontally arranged guiding rod is connected to the position corresponding to the guiding opening on the side of the second sealing piston 50407 far from the hydraulic oil part 50406. The end of the horizontally arranged guiding rod far from the second sealing piston 50407 passes through the sealing ring and extends out of the inside of the horizontally arranged cylinder body 50400 and is connected with a clamping block 50408. A plurality of anti-slip convex strips 50420 are evenly connected to the curved surface of the side of the clamping block 50408 far from the horizontally arranged guiding rod. A plurality of reflux filling components are evenly arranged on the side wall of the horizontally arranged cylinder body 50400 corresponding to the third gas part 50409. A vertically arranged air guide pipe is communicated with each reflux filling component at the position corresponding to the side wall of the bladder 50401 close to the connected horizontally arranged cylinder body 50400. The end of the air guide pipe far from the bladder 50401 is communicated with a hollow box body 50410. The hydraulic oil part 50406 is located between the first sealing piston 50405 and the second sealing piston 50407. The third gas part 50409 is located between the second sealing piston 50407 and the side wall of the inner cavity of the horizontally arranged cylinder body 50400 far from the bladder 50401. The second gas part 50404 is located between the first sealing piston 50405 and the side wall of the inner cavity of the horizontally arranged cylinder body 50400 close to the bladder 50401.

[0047] Please refer to Figures 5-9As shown, the reflow filling component includes a hollow box body 50415. On the left and right sides of the bottom wall of the inner cavity of the hollow box body 50415, baffles 50416 are connected. L-shaped air flow channels are provided on both of the two baffles 50416. The horizontal openings of the L-shaped air flow channels face the solid sphere 50413, and the vertical openings of the L-shaped air flow channels face the top wall of the inner cavity of the hollow box body 50415. A solid sphere 50413 is arranged between the two baffles 50416, and the distance between the two baffles 50416 is consistent with the diameter size of the solid sphere 50413. A gas delivery pipe body 50412 is communicated with the outer wall of the hollow box body 50415 at a position corresponding to the solid sphere 50413. When the solid sphere 50413 is in the initial position, it blocks the opening end of the gas delivery pipe body 50412. One end of the gas delivery pipe body 50412 away from the hollow box body 50415 is communicated with the side wall of the horizontally arranged cylinder body 50400. A horizontal rod body is connected inside the gas delivery pipe body 50412. A columnar vertical hole is vertically penetrated through the horizontal rod body. A bottom connecting and guiding rod 50414 is connected to the outer wall of the solid sphere 50413 on the side close to the gas delivery pipe body 50412 at a position corresponding to the columnar vertical hole. One end of the bottom connecting and guiding rod 50414 away from the solid sphere 50413 penetrates through the columnar vertical hole on the horizontal rod body. On the left and right sides of the top surface of the hollow box body 50415, conducting long pipes 50411 are communicated. One end of the conducting long pipe 50411 away from the hollow box body 50415 is communicated with the hollow box body 50410.

[0048] Please refer to Figure 5 , Figure 8 , Figure 9As shown in the figure, a reset device is also provided above the solid sphere 50413. The reset device includes two sliding blocks 50417, which are symmetrically arranged left and right. The opposite sides of the two sliding blocks 50417 are both connected with a reset spring A 50418, and smooth inclined surfaces are provided on the opposite surfaces of the two sliding blocks 50417. A sliding block 50417 is attached to the surface of each baffle 50416, and the opposite ends of the two reset springs A 50418 are both attached to the side wall of the inner cavity of the hollow box body 50415. Positioning bumps 50419 adapted to the inner diameter size thereof are inserted into the backs of both ends of the reset spring A 50418, and one of the positioning bumps 50419 is connected to the side wall of the sliding block 50417, and the other positioning bump 50419 is connected to the side wall of the inner cavity of the hollow box body 50415. The two smooth inclined surfaces are above the solid sphere 50413, and the outer wall of the solid sphere 50413 is attached to the two smooth inclined surfaces. When the sea organisms on the surface of the distributed buoyancy block 5 immersed in seawater cause the self-weight of the distributed buoyancy block 5 to increase and sink, since the deeper the distributed buoyancy block 5 is immersed in seawater, the greater the pressure exerted by the seawater on the distributed buoyancy block 5, the greater the amount of compression deformation of the bladder 50401, so that the first sealing piston 50405 further pushes the second sealing piston 50407. Since the clamping block 50408 is closely attached to the outer circumference of the dynamic cable and is difficult to move further, the third gas part 50409 is squeezed by the second sealing piston 50407, so that the air pressure inside the air supply pipe body 50412 increases and pushes the solid sphere 50413 to move away from the opening direction of the air supply pipe body 50412 and pushes the two sliding blocks 50417 to move horizontally away from each other. Under the pushing of the solid sphere 50413, the moving directions of the two sliding blocks 50417 are as shown by the arrows in Figure 9 Figure Figure 9 . Subsequently, the third gas part 50409 is introduced into the inside of the bladder 50401 through the conduction long pipe 50411, so that the volume of the bladder 50401 expands and drives the dynamic cable to float again, and will not pull down the system to the seabed, which is beneficial to further maintaining the "double hump" shape of the dynamic cable in the present invention.

[0049] When the clamping block 50408 clamps the dynamic cable, the second gas part 50404 and the third gas part 50409 that can be compressed act as an air spring, so that when the second sealing piston 50407 pushes the clamping block 50408 to clamp and reinforce the dynamic cable, the impact force of the clamping block 50408 on the dynamic cable can be buffered, so that the clamping block 50408 can effectively prevent the clamping block 50408 from causing clamping damage to the outer wall of the cable on the premise of clamping and fixing the dynamic cable.

[0050] Please refer to Figures 1-10As shown, the right hoop 501 and the left hoop 502 are sleeved on the outer periphery of the dynamic cable, and the ends of the right hoop 501 and the left hoop 502 are fixed through the buckle part 503. After the dynamic cable is placed in seawater, under the combined action of the seabed fixing device 6, the distributed buoyancy blocks 5, the counterweight blocks 3 and the submarine cable buried section 7, the dynamic cable forms a "double hump" shape in the seawater. The dynamic cable in the present invention adopts a "double hump" structure design. When the floating platform of the floating wind turbine has an excessive offset, when the cable body of the dynamic cable is in a far-away working condition, there is enough cable length reserve so as not to break the cable body. When in a close working condition, the dynamic cable is affected by buoyancy and will not collapse onto the seabed.

[0051] After the right hoop 501 and the left hoop 502 are tightened on the outer periphery of the dynamic cable, under the action of the telescopic spring connected inside the horizontal cylinder 50400, the clamping block 50408 realizes the re-clamping and fixing of the dynamic cable. When the distributed buoyancy block 5 is in seawater, the pressure in the seawater will squeeze the bladder 50401, causing the first gas part 50402 inside the bladder 50401 to be squeezed into the horizontal cylinder 50400. Subsequently, the air pressure at the second gas part 50404 increases and pushes the clamping block 50408 towards the dynamic cable and further clamps the dynamic cable tightened inside the right hoop 501 and the left hoop 502, so that the buoyancy block components forming the distributed buoyancy block 5 can be firmly fixed on the outer periphery of the dynamic cable to avoid falling off, enabling the distributed buoyancy block 5 to stably exert a buoyancy effect on the dynamic cable, enabling the power cable to continuously maintain the "double hump" shape, and on the premise of meeting the offset of the floating platform of the floating wind turbine, it can also avoid interference and collision with the anchor chain and the seabed.

[0052] When the sea organisms on the surface of the distributed buoyancy block 5 immersed in seawater cause the self-weight of the distributed buoyancy block 5 to increase and sink, since the deeper the distributed buoyancy block 5 is immersed in seawater, the greater the pressure it receives from the seawater, the greater the amount of compression deformation of the bladder 50401, causing the first sealing piston 50405 to further push the second sealing piston 50407. Since the clamping block 50408 is closely attached to the outer periphery of the dynamic cable and is difficult to move further, the third gas part 50409 is squeezed by the second sealing piston 50407, causing the air pressure inside the air supply pipe body 50412 to increase and push the solid sphere 50413 to move away from the opening direction of the air supply pipe body 50412. Subsequently, the third gas part 50409 is introduced into the bladder 50401 through the conduction long pipe 50411, causing the volume of the bladder 50401 to expand and driving the dynamic cable to float again, and will not pull the system down to the seabed, which is beneficial to further maintaining the "double hump" shape of the dynamic cable in the present invention.

[0053] The above are only the preferred specific embodiments of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.

Claims

1. Wave compensation system for floating wind turbines, comprising a dynamic cable, a sealed anchor (1), a bending reinforcement (2), a counterweight (3), an anti-wear protection pipe (4), a seabed fixing device (6), a bending limiter (8), a central limiting device (9), a platform anchor (10), characterized in that: A plurality of groups of distributed buoyancy blocks (5) are arranged on the outer periphery of the dynamic cable. A seabed fixing device (6) is provided between every two adjacent groups of distributed buoyancy blocks (5). A wire rope is connected between the seabed fixing device (6) and the dynamic cable. The sealing anchor (1) is fixedly connected to one end of the dynamic cable. The platform anchor (10) is fixed to the other end of the dynamic cable. The central limiting device (9) is sleeved on the outer periphery of the dynamic cable near one end of the platform anchor (10). The bending strengthening member (2) is sleeved on the outer periphery of the dynamic cable near one end of the sealing anchor (1). The bending limiter (8) is sleeved on the outer periphery of the dynamic cable near one side of the central limiting device (9), and the bending limiter (8) is connected to the central limiting device (9). The counterweight block (3) is sleeved and fixed on the outer periphery of the dynamic cable. A section of submarine cable burying section (7) is provided on one side of the dynamic cable near the bending limiter (8); Wear-resistant protection pipes (4) are sleeved on the outer peripheries of the dynamic cables between the counterweight block (3) and the distributed buoyancy blocks (5), between every two adjacent groups of distributed buoyancy blocks (5), and between the submarine cable burying section (7) and the distributed buoyancy blocks (5); The distributed buoyancy block (5) is composed of a plurality of buoyancy block components. The buoyancy block component includes a right hoop (501) and a left hoop (502). The end of the right hoop (501) is hinged to the end of the left hoop (502). The right hoop (501) and the left hoop (502) are connected by a snap portion (503). Installation straight grooves are horizontally penetrated through the right hoop (501) and the left hoop (502). An over-surplus buoyancy mechanism is arranged inside each installation straight groove; The excess buoyancy mechanism includes a horizontally arranged cylinder body (50400), a connecting frame is sleeved and fixed on the outer periphery of the horizontally arranged cylinder body (50400), and the connecting frame is fixedly connected to the corresponding installation straight groove. The end of the horizontally arranged cylinder body (50400) is communicated with a bladder (50401), the inside of the bladder (50401) is filled with a first gas part (50402), the side part of the bladder (50401) is provided with a V-shaped folding part, and a return spring B (50403) is connected between two adjacent V-shaped folding parts. A first sealing piston (50405) is movably arranged on one side of the horizontally arranged cylinder body (50400) close to the bladder (50401), and a second sealing piston (50407) is also movably arranged on the side of the horizontally arranged cylinder body (50400) far from the bladder (50401). The inside of the horizontally arranged cylinder body (50400) is filled with a hydraulic oil part (50406), and a third gas part (50409) is also filled in the horizontally arranged cylinder body (50400). A plurality of telescopic springs are uniformly connected to the side wall of the inner cavity of the horizontally arranged cylinder body (50400) close to the bladder (50401), and the side far from the inner wall of the horizontally arranged cylinder body (50400) of the telescopic spring is connected to the side wall of the first sealing piston (50405). A second gas part (50404) is filled in the inner cavity of the horizontally arranged cylinder body (50400); A guiding opening is horizontally opened at one end of the horizontally arranged cylinder body (50400) far from the bladder (50401), a sealing ring is connected in the guiding opening, a horizontally arranged guiding rod is connected to the position corresponding to the guiding opening on the side of the second sealing piston (50407) far from the hydraulic oil part (50406), and one end of the horizontally arranged guiding rod far from the second sealing piston (50407) passes through the sealing ring and extends out of the inside of the horizontally arranged cylinder body (50400) and is connected with a clamping block (50408). A plurality of anti-slip ridges (50420) are uniformly connected to the curved surface on the side of the clamping block (50408) far from the horizontally arranged guiding rod; A plurality of reflux filling components are uniformly arranged on the side wall of the horizontally arranged cylinder body (50400) corresponding to the position of the third gas part (50409). A vertically arranged air guiding pipe is communicated with each reflux filling component at the position corresponding to the side wall of the bladder (50401) close to the connected horizontally arranged cylinder body (50400). One end of the air guiding pipe far from the bladder (50401) is communicated with a hollow box body (50410).

2. The wave compensation system for a floating wind turbine according to claim 1, wherein: The hydraulic oil part (50406) is located between the first sealing piston (50405) and the second sealing piston (50407), the third gas part (50409) is located between the second sealing piston (50407) and the side wall of the inner cavity of the horizontally arranged cylinder body (50400) far from the bladder (50401), and the second gas part (50404) is located between the first sealing piston (50405) and the side wall of the inner cavity of the horizontally arranged cylinder body (50400) close to the bladder (50401).

3. The wave compensation system for a floating wind turbine according to claim 1, characterized in that: The reflux filling component includes a hollow box body (50415). On the left and right sides of the bottom wall of the inner cavity of the hollow box body (50415), baffles (50416) are connected. L-shaped air flow channels are opened on both of the two baffles (50416). The horizontal opening of the L-shaped air flow channel faces the solid sphere (50413), and the vertical opening of the L-shaped air flow channel faces the top wall of the inner cavity of the hollow box body (50415). A solid sphere (50413) is arranged between the two baffles (50416), and the distance between the two baffles (50416) is consistent with the diameter size of the solid sphere (50413). A gas delivery pipe body (50412) is communicated with the outer wall of the hollow box body (50415) at a position corresponding to the solid sphere (50413). When the solid sphere (50413) is in the initial position, it blocks the opening end of the gas delivery pipe body (50412). A horizontal rod body is connected inside the gas delivery pipe body (50412). A columnar vertical hole is vertically penetrated through the horizontal rod body. A bottom connecting and guiding rod (50414) is connected to the outer wall of the solid sphere (50413) on the side close to the gas delivery pipe body (50412) at a position corresponding to the columnar vertical hole. One end of the bottom connecting and guiding rod (50414) away from the solid sphere (50413) penetrates through the columnar vertical hole on the horizontal rod body. On the left and right sides of the top surface of the hollow box body (50415), conduction long pipes (50411) are communicated.

4. The wave compensation system for a floating wind turbine according to claim 3, characterized in that: A reset device is further arranged above the solid sphere (50413). The reset device includes two sliding blocks (50417). The two sliding blocks (50417) are symmetrically arranged left and right. On the opposite surfaces of the two sliding blocks (50417), reset springs A (50418) are connected. Smooth inclined surfaces are opened on the opposite surfaces of the two sliding blocks (50417). One of the sliding blocks (50417) is attached to the surface of each baffle (50416). The opposite ends of the two reset springs A (50418) are attached to the side walls of the inner cavity of the hollow box body (50415).

5. The wave compensation system for a floating wind turbine according to claim 3, wherein: The end of the gas delivery pipe body (50412) away from the hollow box body (50415) is communicated with the side wall of the horizontal cylinder body (50400).

6. The wave compensation system for a floating wind turbine according to claim 4, characterized in that: Positioning bumps (50419) adapted to the inner diameter size of the reset spring A (50418) are inserted into the backs of both ends of the reset spring A (50418). One of the positioning bumps (50419) is connected to the side wall of the sliding block (50417), and the other positioning bump (50419) is connected to the side wall of the inner cavity of the hollow box body (50415).

7. The wave compensation system for a floating wind turbine according to claim 3, wherein: The end of the conduction long pipe (50411) away from the hollow box body (50415) is communicated with the hollow box body (50410).

8. The wave compensation system for a floating wind turbine according to claim 4, wherein: The two smooth inclined surfaces are above the solid sphere (50413), and the outer wall of the solid sphere (50413) is attached to the two smooth inclined surfaces.

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