Offshore floating wind turbine foundation

Abstract

This invention provides an offshore floating wind turbine foundation, relating to the field of offshore wind power generation technology. The technology includes a floating platform, which is polygonal in shape with a floating block on each side. Each side of the platform has a groove, and a ratchet is rotatably mounted inside the groove. A pawl is rotatably connected to the upper part of the ratchet inside the groove, near the ratchet. Under gravity, the end of the pawl engages with the external teeth of the ratchet. A synchronously rotating take-up roller is located on one side of the pawl, and an anchor chain is mounted on the outer surface of the take-up roller. An anchor pawl is fixedly connected to the end of the anchor chain. An arc-shaped plate is movably mounted inside the groove near the lower part of the ratchet. Several internal claws are provided on the upper surface of the arc-shaped plate, and the surface of the floating block is fixedly connected to the lower surface of the arc-shaped plate. This invention provides wave impact resistance and a buffering effect. Simultaneously, during impacts, the anchor chain can be tightened to prevent loosening over long-term use, thus maintaining the long-term stability of the foundation and reducing maintenance frequency.

Description

Technical Field

[0001] This invention relates to the field of offshore wind power generation technology, and in particular to an offshore floating wind turbine foundation. Background Technology

[0002] Offshore wind power is characterized by abundant resources, high power generation utilization hours, no land occupation, and suitability for large-scale development. It represents the latest frontier in global wind power development. Floating foundations are a commonly used type. However, even after the foundation layout and wind turbine installation are completed, the foundation may still become unstable due to the action of waves. This swaying problem will become more severe as the anchor end shifts from the seabed over a long period of time. Therefore, we have designed a floating offshore wind turbine foundation.

[0003] Application CN112357000A discloses an offshore floating wind turbine foundation, including columns and a heave plate. The heave plate is located below the columns. Three columns are arranged in an equilateral triangle, with truss structures symmetrically distributed on the three sides of the triangle between adjacent columns. Each column comprises a first inner steel plate and a first outer steel plate, both of which are hollow column structures. The first inner steel plate is housed within the hollow column of the first outer steel plate, and the first outer and first inner steel plates are coaxially aligned. One column has an mounting section for installing the wind turbine tower. Concrete is poured into the cavity between the first outer and first inner steel plates, enhancing the rigidity and fatigue strength of the foundation structure while reducing steel consumption and saving costs. Analysis shows that the technical means employed in the published document differ from those in this invention. Summary of the Invention

[0004] This invention provides a floating offshore wind turbine foundation, with the aim of solving at least one of the technical problems mentioned in the background section of the prior art.

[0005] The present invention provides the following technical solution to achieve the above objectives: A floating wind turbine foundation includes a floating platform. The platform is polygonal in shape with a floating block on each side. Each side of the platform has a groove. A ratchet is rotatably mounted inside the groove, and a pawl is rotatably connected to the inside of the groove near the ratchet. Under the action of gravity, the end of the pawl engages with the external teeth of the ratchet. A synchronously rotating take-up roller is provided on one side of the pawl. An anchor chain is provided on the outer surface of the take-up roller, and an anchor pawl is fixedly connected to the end of the anchor chain. An arc-shaped plate is movably arranged inside the groove near the bottom of the ratchet. Several internal claws are provided on the upper surface of the arc-shaped plate, and the surface of the floating block is fixedly connected to the lower surface of the arc-shaped plate.

[0006] In the aforementioned offshore floating wind turbine foundation, a stabilizing plate is fixedly installed on the inner wall of the groove. Two side plates are vertically fixedly connected to the side surface of the stabilizing plate, and a rotating column is rotatably installed between the two side plates. One side of the winding roller is connected to the rotating column. The outer surface of the ratchet is fitted onto the rotating column. A rotating shaft is fixedly installed through the inner side of the pawl near the upper end. The two ends of the rotating shaft are rotatably connected to the side plates respectively, and one end of the rotating column is fixedly connected to the winding roller.

[0007] In the aforementioned offshore floating wind turbine foundation, the outer surfaces of the two side plates are provided with arc-shaped openings, and the interior of the arc-shaped openings is provided with concave edges, which are fixedly installed on both sides of the arc-shaped plates.

[0008] In the aforementioned offshore floating wind turbine foundation, a recessed groove is provided on the upper surface of the floating platform near the groove. A drive mechanism is installed inside the recessed groove. The drive mechanism includes a motor. A locking block is fixedly sleeved on the outer surface of the motor. A stabilizing base plate is fixedly installed on the lower surface of the motor. A locking slot is provided on one side of the locking block.

[0009] In the aforementioned offshore floating wind turbine foundation, the side surface of the floating platform is fixedly provided with limiting blocks on both sides corresponding to the locking blocks.

[0010] In the aforementioned offshore floating wind turbine foundation, the output shaft of the motor is fixedly connected to an output head, the end face of the output head is provided with a slot, the end of the winding roller is fixedly provided with a transmission head, the end face of the transmission head is provided with a locking block, the locking block slides into the inner side of the slot, and the rear end of the motor is fixedly provided with a rear pad block, the rear pad block slides against the inner wall of the groove.

[0011] In the aforementioned offshore floating wind turbine foundation, a groove is formed on the side of the float near the winding roller.

[0012] In the aforementioned offshore floating wind turbine foundation, an installation platform is fixedly installed on the inner side of the floating platform, a railing is fixedly installed on the upper surface of the floating platform near the inner edge, and a lower stop is protruding on the lower surface of the floating platform near the floating block.

[0013] In the aforementioned offshore floating wind turbine foundation, a thickened section is provided on the inner side of the floating platform at the position corresponding to the groove.

[0014] In the aforementioned offshore floating wind turbine foundation, a connecting block is fixedly connected to the lower surface of the arc-shaped plate, and the lower end of the connecting block is fixedly connected to the upper surface of the floating block.

[0015] Beneficial effects Compared with the prior art, the present invention has the following beneficial effects: 1. The anchor claws of this invention stably grip the seabed. When impacted by waves, the buoy rises first, and the corresponding concave edge moves upward relative to the inside of the arc-shaped opening. As it moves upward, the inner claws engage with the edge of the ratchet. Then, continuing to be impacted by the waves, the buoy is pushed up by the impact force as it passes below, causing the inner claws to drive the ratchet to rotate. During this rotation, the upper ratchet is pushed open, and the rotation of the ratchet causes the winding roller to rotate synchronously, winding up the anchor chain and tightening it. During this process, the impact of the buoy and the waves creates buffer waves that move downwards in two directions. The kinetic energy of these buffer waves is effectively reduced, minimizing the impact on the edge of the floating platform. After the waves disappear, under gravity, the inner claws disengage from the ratchet, and the arc-shaped plate falls away from the ratchet. At this point, the ratchet prevents the ratchet from reversing, preventing the anchor chain from being lowered. Therefore, this invention can automatically tighten the anchor chain with the impact of the waves, thus ensuring the long-term stability of the floating platform.

[0016] 2. Under the action of the wave belt, when it impacts the bottom of the float, the float will float upward, consuming part of the kinetic energy of the wave belt and having a buffering effect. This can reduce the direct impact of the wave belt on the floating platform and is beneficial to the stability of the entire foundation.

[0017] 3. This invention can drive the winding roller to rotate via a motor, with the cooperation of the transmission head and the output head, thereby quickly adjusting the lowering length of the anchor chain. The locking block and the locking slot are adjusted to be vertical. By suspension, the locking block can be lifted out for placement in another hiding slot position for driving. During placement, the locking slot is engaged with the side of the hiding slot, and one side of the locking block passes between two limiting blocks, which ensures stable locking. The driving mechanism is convenient to use, low in cost, and the motor can be retracted after use.

[0018] In summary, this invention provides wave impact resistance and has a buffering effect. Furthermore, it tightens the anchor chain during impacts, preventing loosening over time and contributing to long-term foundation stability while reducing maintenance frequency. The anchor chain lowering length can be quickly controlled, and the motor is easy to retrieve. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2This is a partial structural diagram of the present invention; Figure 3 This is a partial cross-sectional view of the present invention; Figure 4 This is a cross-sectional view of the groove in the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle; Figure 6 This is a schematic diagram of the ratchet mechanism of the present invention; Figure 7 This is a schematic diagram of the side plate of the present invention; Figure 8 Schematic diagram of the floating block in this invention; Figure 9 This is a schematic diagram of the drive mechanism of the present invention; Figure 10 This is a schematic diagram of the recessed groove of the present invention; Figure 11 This is a schematic diagram of the invention after installation; Figure 12 This is a partial state during the use of the present invention. Figure 1 ; Figure 13 This is a partial state during the use of the present invention. Figure 2 ; Figure 14 This is a partial state during the use of the present invention. Figure 3 ; Figure 15 This is a partial state during the use of the present invention. Figure 4 .

[0021] Reference numerals: 1-Floating platform; 2-Groove; 3-Thickened section; 4-Rewinding roller; 5-Anchor chain; 6-Anchor claw; 7-Side plate; 8-Stabilizing plate; 9-Rotating column; 10-Ratchet; 11-Pawl; 12-Shaft; 13-Arc-shaped plate; 14-Inner claw; 15-Concave edge; 16-Arc-shaped opening; 17-Connecting block; 18-Floating block; 19-Pass through groove; 20-Hidden groove; 21-Motor; 22-Output head; 23-Slot; 24-Transmission head; 25-Clamping block; 26-Stabilizing base plate; 27-Clamping block; 28-Clamping opening; 29-Restriction block; 30-Rear pad block; 31-Lower stop block; 32-Fence; 33-Mounting platform; 34-Seabed; 35-Fixing point; 36-Wave band; 37-Blocking wave. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0023] It should be noted that in this invention: the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices; the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," "longitudinal," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings. The terminology used is primarily for the purpose of better describing the invention and its embodiments, and is not intended to limit the indicated devices, elements, or components to having a specific orientation, or to construct and operate in a specific orientation. Terms such as "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Terms such as "installed," "set," "equipped with," "connected," "linked," "socketed," etc., should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Furthermore, some terms, in addition to indicating orientation or positional relationships, may also have other meanings; for example, the term "above" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this invention according to the specific circumstances.

[0024] Example. A floating offshore wind turbine foundation, such as... Figure 1-15 As shown, the system includes a floating platform 1, which is polygonal in shape with a float 18 on each side. Each side of the floating platform 1 has a groove 2. A ratchet 10 is rotatably mounted inside the groove 2, and a pawl 11 is rotatably connected above the ratchet 10 on the inner side of the groove 2. Under gravity, the end of the pawl 11 engages with the outer teeth of the ratchet 10. A synchronously rotating take-up roller 4 is located on one side of the pawl 11. An anchor chain 6 is provided on the outer surface of the take-up roller 1, and an anchor pawl 6 is fixedly connected to the end of the anchor chain 6. An arc-shaped plate 13 is movably arranged inside the groove 3 near the bottom of the ratchet 10. Several inner claws 14 are provided on the upper surface of the arc-shaped plate 13, and the surface of the float 18 is fixedly connected to the lower surface of the arc-shaped plate 13. When the float 18 is impacted by the wave belt 36, it floats upward. The inner claws 14 move upward and engage with the outer teeth of the ratchet 10, causing the ratchet 10 to rotate. After the wave belt 36 passes, the float 18 moves downward, and the inner claws 14 leave the ratchet 10. This floating foundation is designed to withstand wave impacts and provides a buffering effect. In the event of an impact, the anchor chain 5 can be tightened to prevent it from loosening over time, thus helping to maintain the long-term stability of the foundation and reducing the frequency of maintenance.

[0025] like Figure 2 , Figure 3 , Figure 4 As shown, a stabilizing plate 8 is fixedly installed on the inner wall of the groove 2. Two side plates 7 are vertically fixedly connected to the side surface of the stabilizing plate 8. A rotating column 9 is rotatably installed between the two side plates 7. One side of the take-up roller 4 is connected to the rotating column 9. The outer surface of the ratchet 10 is fitted onto the rotating column 9. A rotating shaft 12 is fixedly installed through the inner side of the pawl 11 near the upper end. The two ends of the rotating shaft 12 are rotatably connected to the side plates 7 respectively. One end of the rotating column 9 is fixedly connected to the take-up roller 4, thereby ensuring that the take-up roller 4 can rotate synchronously when the ratchet 10 rotates.

[0026] like Figure 5 , Figure 6 , Figure 7 As shown, the outer surfaces of the two side plates 7 are provided with arc-shaped openings 16, and concave edges 15 are provided inside the arc-shaped openings 16. The concave edges 15 are fixedly provided on both sides of the arc-shaped plate 13. The concave edges 15 are movably engaged inside the arc-shaped openings 16 to limit the movement of the arc-shaped plate 13 and ensure that it will not detach from the side plates 7.

[0027] like Figure 9 , Figure 10 As shown, a concealed groove 20 is formed on the upper surface of the floating platform 1 near the groove 2. A drive mechanism is fitted inside the concealed groove 20. The drive mechanism includes a motor 21. A locking block 27 is fixedly sleeved on the outer surface of the motor 21. A stabilizing base plate 26 is fixedly set on the lower surface of the motor 21. A locking slot 28 is formed on one side of the locking block 27. The output shaft of the motor 21 is engaged with one side of the winding roller 4. Restricting blocks 29 are fixedly set on the side surface of the floating platform 1 corresponding to both sides of the locking block 27. The locking block 27 slides with the inner wall of the concealed groove 20. A lifting ring is fixedly set at the upper end of the locking block 27 for easy lifting and repositioning.

[0028] like Figure 9 Figure 10 As shown, the output shaft of the motor 21 is fixedly connected to an output head 22, and the end face of the output head 22 is provided with a slot 23. The end of the take-up roller 4 is fixedly provided with a transmission head 24, and the end face of the transmission head 24 is provided with a locking block 25. The locking block 25 slides into the inner side of the slot 23. The rear end of the motor 21 is fixedly provided with a rear pad 30, which slides against the inner wall of the recessed groove 20 to protect the rear end of the motor 21 and also ensures high accuracy of the motor 21's position.

[0029] like Figure 8 As shown, a groove 19 is provided on the edge of the float 18 near the take-up roller 4. The groove 19 is used to provide space for the anchor chain 5 to pass through.

[0030] like Figure 2 As shown, a thickened portion 3 is provided on the inner side of the floating platform 1 at the position corresponding to the groove 2. The thickened portion 3 improves the structural strength.

[0031] like Figure 1 As shown, an installation platform 33 is fixedly installed on the inner side of the floating platform 1, and a railing 32 is fixedly installed on the upper surface of the floating platform 1 near the inner edge. A lower stop 31 is protruding on the lower surface of the floating platform 1 near the float 18. The stop 31 is used to prevent the floating platform 1 from sinking too deep when entering the water, which would cause the float 18 to float up when there is no wave band 36.

[0032] like Figure 5 , Figure 8 As shown, a connecting block 17 is fixedly connected to the lower surface of the arc-shaped plate 13, and the lower end of the connecting block 17 is fixedly connected to the upper surface of the float 18. The connecting block 17 and the float 18 are made of plastic, and the floating platform 1 can be made of materials and structures commonly used in existing floating foundations.

[0033] Working principle of this invention: During installation, as follows Figure 11 , Figure 12 , Figure 13Anchor claw 6 is fixed at the pre-calculated fixing point 35, stably gripping the seabed 34. When impacted by wave band 36, float 18 will rise first, and the corresponding concave edge 15 will move upward relative to the inside of the arc-shaped opening 16. As it moves upward, the inner claw 14 will get stuck on the edge of ratchet 10. Then, it continues to be affected by wave band 36 (wave band 36 passes below float 18). At this time, float 18 continues to be pushed up by the impact force, causing the inner claw 14 to drive ratchet 10 to rotate. When rotating, the upper ratchet 10 will be... When the ratchet 10 rotates, it causes the winding roller 4 to rotate synchronously, thus winding up the anchor chain 5 and tightening it. During this process, the float 18 collides with the wave belt 36, forming a buffer wave 37 that moves downwards in two directions. At this time, the kinetic energy of the buffer wave 37 has been effectively reduced, reducing the impact on the edge of the floating platform 1. After the wave belt 36 disappears, under the action of gravity, the inner claw 14 disengages from the ratchet 10, and the arc plate 13 also falls away from the ratchet 10. At this time, under the action of the pawl 11, it prevents... When ratchet 10 reverses, it will not lower anchor chain 5. Therefore, with the impact of waves, it can automatically tighten anchor chain 5, thus ensuring the long-term stability of floating platform 1. Under the action of wave belt 36, when it impacts the bottom of float 18, float 18 will float upward, consuming part of the kinetic energy of wave belt 36, thus having a buffering effect. This can reduce the direct impact of wave belt 36 on floating platform 1 and is beneficial to the stability of the entire foundation. In the arrangement of floating platform 1, it can be driven by motor 21, with transmission head 24 In conjunction with the output head 22, the take-up roller 4 rotates, thereby quickly adjusting the lowering length of the anchor chain 5. The locking block 25 and the locking slot 23 are adjusted to be vertical. By suspension, the locking block 27 can be lifted out so that it can be placed in another hiding slot 20 for driving. During placement, the locking slot 28 is locked into the side of the hiding slot 20, and one side of the locking block 27 passes between two limiting blocks 29 to ensure stability. The drive mechanism is convenient to use and low in cost. The motor 21 can be retracted after use.

[0034] Obviously, the above description is only a part of the embodiments of the present invention, and not all of the embodiments. The above embodiments are not intended to limit the present invention, and various modifications and variations can be made to the present invention by those skilled in the art. Any combination, modification, equivalent substitution, improvement, and all other embodiments that can be made by those skilled in the art within the spirit and principles of the present invention should be within the protection scope of the present invention.

Claims

1. A floating wind turbine foundation for offshore, characterized in that: it includes a floating platform (1), the floating platform (1) is polygonal in shape and each side is provided with a floating block (18), each side of the floating platform (1) is provided with a groove (2), a ratchet (10) is rotatably installed inside the groove (2), and a pawl (11) is rotatably connected above the ratchet (10) on the inside of the groove (2), the end of the pawl (11) is engaged with the outer teeth of the ratchet (10) under the action of gravity, a synchronously rotating winding roller (4) is provided on one side of the pawl (11), an anchor chain (5) is provided on the outer surface of the winding roller (4), an anchor claw (6) is fixedly connected to the end of the anchor chain (5), an arc plate (13) is movably provided on the inside of the groove (2) near the bottom of the ratchet (10), a number of inner claws (14) are provided on the upper surface of the arc plate (13), and the surface of the floating block (18) is fixedly connected to the lower surface of the arc plate (13); A stabilizing plate (8) is fixedly installed on the inner wall of the groove (2). Two side plates (7) are vertically fixedly connected to the side surface of the stabilizing plate (8). A rotating column (9) is rotatably installed between the two side plates (7). One side of the take-up roller (4) is connected to the rotating column (9). The outer surface of the ratchet (10) is fitted onto the rotating column (9). A rotating shaft (12) is fixedly installed through the inner side of the pawl (11) near the upper end. The two ends of the rotating shaft (12) are rotatably connected to the side plates (7) respectively. One end of the rotating column (9) is fixedly connected to the take-up roller (4). The upper surface of the floating platform (1) is provided with a hiding groove (20) on the side near the groove (2). A driving mechanism is installed inside the hiding groove (20). The driving mechanism includes a motor (21). A locking block (27) is fixedly sleeved on the outer surface of the motor (21). A stabilizing base plate (26) is fixedly installed on the lower surface of the motor (21). A locking slot (28) is provided on one side of the locking block (27).

2. The offshore floating wind turbine foundation according to claim 1, characterized in that: the outer surfaces of the two side plates (7) are provided with arc-shaped openings (16), the interior of the arc-shaped openings (16) is provided with concave edges (15), and the concave edges (15) are fixedly provided on both sides of the arc-shaped plate (13).

3. The offshore floating wind turbine foundation according to claim 1, characterized in that: a limiting block (29) is fixedly provided on both sides of the side surface of the floating platform (1) corresponding to the two sides of the locking block (27).

4. The offshore floating wind turbine foundation according to claim 1, characterized in that: the output shaft of the motor (21) is fixedly connected to an output head (22), the end face of the output head (22) is provided with a slot (23), the end of the winding roller (4) is fixedly provided with a transmission head (24), the end face of the transmission head (24) is provided with a locking block (25), the locking block (25) slides into the inner side of the slot (23), and the rear end of the motor (21) is fixedly provided with a rear pad (30), the rear pad (30) slides against the inner wall of the recessed groove (20).

5. The offshore floating wind turbine foundation according to claim 1, characterized in that: a groove (19) is provided on the side of the float (18) near the winding roller (4).

6. The offshore floating wind turbine foundation according to claim 1, characterized in that: an installation platform (33) is fixedly provided on the inner side of the floating platform (1), a fence (32) is fixedly installed on the upper surface of the floating platform (1) near the inner edge, and a lower stop block (31) is protruding on the lower surface of the floating platform (1) near the side of the floating block (18).

7. The offshore floating wind turbine foundation according to claim 1, characterized in that: a thickened part (3) is provided on the inner side of the floating platform (1) at the position corresponding to the groove (2).

8. The offshore floating wind turbine foundation according to claim 1, characterized in that: a connecting block (17) is fixedly connected to the lower surface of the arc plate (13), and the lower end of the connecting block (17) is fixedly connected to the upper surface of the floating block (18).

Images