Dynamic umbrella tray induced deposition device

Abstract

The invention relates to the technical field of offshore wind power foundation protection, in particular to a dynamic umbrella disc induced deposition device. The dynamic umbrella disc induced deposition device comprises an umbrella disc support fixedly connected with an offshore wind turbine pile foundation. The umbrella disc induction assembly comprises a rotary supporting structure installed in the umbrella disc support and a plurality of flexible blades connected and arranged in the horizontal circumferential direction of the rotary supporting structure, and the flexible blades are located at the bottom of the umbrella disc support and extend in the radial direction expanding outwards to form an umbrella disc-shaped structure; the surface of each flexible blade is provided with a sand guiding groove, and the guiding-out direction of the sand guiding groove faces the sand washing pit area below the sand guiding groove. Therefore, the technical problems that an existing anti-scouring structure lacks dynamic protection capacity and automatic repairing capacity for the scouring pit, regular maintenance and manual repairing are needed, the repairing period is long, potential safety hazards exist, and clogging is likely to be caused by solid protection are solved.

Description

Technical Field

[0001] This application relates to the field of offshore wind power foundation protection technology, and in particular to a dynamic umbrella-disc induced sedimentation device. Background Technology

[0002] Because offshore wind turbine foundations are subject to long-term tidal erosion, localized scour pits are easily formed, leading to a decrease in foundation bearing capacity and even structural tilting. If the depth of the scour pit exceeds the safety threshold, it may cause foundation resonance or fatigue damage, threatening the safe operation of the wind turbine. Therefore, it is necessary to address the protection of scour pits formed around wind turbine foundations due to water erosion.

[0003] Existing methods generally address the aforementioned problems using scour protection structures. Traditional scour protection structures typically employ rigid protective structures, such as riprap bottom supports, reinforced concrete skirts, and filter bags or sandbags. However, riprap bottom supports rely on the weight of the riprap for stability and are easily dispersed by current flow; filter bags or sandbags provide only short-term protection and are prone to clogging; reinforced concrete skirts are fixed protective structures with poor adaptability and cannot adapt to changes in current flow. Furthermore, none of these existing scour protection structures can provide dynamic protection and automatic repair of scour pits. They lack the ability to automatically repair scour pits, requiring regular maintenance and manual repair. This not only results in long repair cycles but also poses safety hazards to wind turbine operation if the depth of the scour pit exceeds the safety threshold during this period, potentially leading to foundation resonance or fatigue damage. Summary of the Invention

[0004] The purpose of this application is to provide a dynamic umbrella-disc induced sedimentation device to solve the problems of existing anti-scour structures lacking dynamic protection and automatic repair capabilities for scour pits, requiring regular maintenance and manual repair, which not only has a long repair cycle but also poses safety hazards. Furthermore, solid protection is prone to causing technical problems such as clogging.

[0005] This application provides a dynamic umbrella-disc induced deposition device, comprising: The umbrella-shaped support frame is connected and fixed to the offshore wind turbine pile foundation; and The umbrella disc guiding assembly includes a rotating support structure installed inside the umbrella disc bracket, and a plurality of flexible blades arranged in a horizontal circumferential direction along the rotating support structure. Each of the flexible blades is located at the bottom of the umbrella disc bracket and extends outward in a radial direction to form an umbrella disc-shaped structure. Furthermore, each of the flexible blades is arranged at a lateral inclination, and the surface of each flexible blade is provided with a sand-guiding groove, the outgoing direction of which is towards the sand-flushing pit area below.

[0006] Furthermore, the umbrella-shaped support is configured as a rotatable cylindrical structure, with its inner wall fixedly connected to the outer periphery of the offshore wind turbine pile foundation. The roots of each flexible blade are connected to the bottom circumferential direction of the cylindrical structure. A first drive motor for driving the cylindrical structure to rotate is provided inside the cylindrical structure; or The umbrella tray support has an inner cylinder inside, and the umbrella tray support has an outer shell. The inner cylinder is located inside the outer shell, and the inner wall of the inner cylinder is fixedly connected to the outer periphery of the offshore wind turbine pile foundation.

[0007] Furthermore, the inner cylinder is configured as a rotatable rotating inner cylinder, with the root of each of the flexible blades connected to the bottom outer periphery of the rotating inner cylinder. The rotating support structure includes the rotating inner cylinder and a first drive motor for driving the rotating inner cylinder to rotate; or The rotating support structure includes a rotating bearing sleeved and connected to the bottom outer periphery of the inner cylinder and a first drive motor that drives the rotating bearing to rotate, with the root of each flexible blade connected to the outer periphery of the rotating bearing.

[0008] Furthermore, the cylindrical structure or the outer circumference of the horizontal bottom of the rotating inner cylinder, or the outer circumference of the rotating bearing, is provided with a plurality of blade connection holes. Each blade connection hole is provided with a rotating shaft extending outward. The rotating shaft is assembled and connected to the root of the flexible blade to drive the flexible blade to rotate. The umbrella disc bracket is provided with a second drive motor that is driven and connected to each of the rotating shafts.

[0009] Furthermore, each of the rotating shafts is fitted with an angle positioning structure, which is configured as an indexing gear, spline, or multi-stage ratchet. The umbrella disc support is also equipped with a control module, which is electrically connected to the second drive motor. The second drive motor is electrically connected to each of the rotating shafts and the angle positioning structure set on them, so as to control each of the flexible blades to rotate to a preset specified angle.

[0010] Furthermore, the control module is also electrically connected to the first drive motor to control each of the flexible blades to rotate at a preset rotational speed.

[0011] Furthermore, the umbrella tray support is also equipped with a flow velocity sensor inside. The flow velocity sensor can sense the direction and intensity of the tidal flow. The flow velocity sensor is electrically connected to the control module and transmits the sensed flow direction and flow velocity information to the control module. The control module controls each of the second drive motors to drive each of the rotating shafts to rotate to a specified angle based on the received flow direction information. The specified angle is the lateral tilt angle corresponding to the direction of the current flow. The control module controls the rotational speed of the first drive motor based on the received flow rate information.

[0012] Furthermore, the umbrella disc support is also equipped with a multi-wave speed scanner to scan and sense the depth of the sand flushing pit, and it is electrically connected to the control module to transmit the sensed sand flushing pit depth data to the control module, and the control module is electrically connected to the start / stop drive module of the dynamic umbrella disc induced deposition device. When the depth data of the sand flushing pit received by the control module is less than the preset safety threshold, the start-stop drive module does not start or stops; when the depth data of the sand flushing pit received by the control module is greater than or equal to the preset safety threshold, the start-stop drive module starts.

[0013] Furthermore, the sand-guiding groove is an arc-shaped or straight strip-shaped channel, with two openings at opposite ends serving as inlet and outlet ports. One of the openings is directly connected to the side of the flexible blade near its root, and the other opening is directly connected to the other side of the flexible blade away from its root.

[0014] Furthermore, the umbrella-shaped support is fixedly installed on the offshore wind turbine pile foundation by nesting a locking ring or a flange ring; and / or The extension length of the flexible blade is greater than or equal to the diameter of the offshore wind turbine pile foundation.

[0015] Compared with the prior art, the dynamic umbrella-shaped sedimentation device provided in this application includes: an umbrella-shaped support fixedly connected to the offshore wind turbine pile foundation and an umbrella-shaped induction component connected to the umbrella-shaped support. The umbrella-shaped induction component includes a rotating support structure installed inside the umbrella-shaped support and a plurality of flexible blades arranged horizontally and circumferentially along the rotating support structure. Each flexible blade is located at the bottom of the umbrella-shaped support and extends outward in a radial direction to form an umbrella-shaped structure. Each flexible blade is laterally inclined and has sand-guiding grooves on its surface. The sand-guiding grooves are directed towards the sand flushing pit area below, thereby realizing the function of automatically guiding sand to the sand flushing pit area below, and realizing the dynamic protection and automatic repair of the sand flushing pit.

[0016] During the construction phase of offshore wind turbine foundations, after the foundation piling is completed, the dynamic umbrella-shaped sedimentation device can be installed on the offshore wind turbine pile foundation, and the flexible blades can be deployed on the seabed. The rotating support structure is activated, which drives the umbrella-shaped structure formed by the multiple flexible blades to rotate horizontally at the bottom of the umbrella-shaped support (i.e., above the sand flushing pit area). A low-pressure zone is formed below the umbrella-shaped structure, which induces more sediment to converge in the low-pressure zone due to the pressure difference. Some sediment is directly deposited in the sand flushing pit area below, while some is induced into the sand guide grooves in the flexible blades and guided into the sand flushing pit area for accumulation and deposition.

[0017] This enables dynamic induction of quicksand to automatically fill and accumulate sediment, achieving dynamic protection and automatic repair capabilities for scour pits, greatly reducing the repair cycle, improving safety, and achieving low energy consumption and low maintenance costs. Furthermore, the structure of dynamically rotating and laterally tilting flexible blades also greatly reduces quicksand blockage, resulting in low later maintenance costs and extending the service life of the structure. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the dynamic umbrella disk induced deposition device provided in the embodiments of this application.

[0020] Figure label: 10-Umbrella tray support; 20 - Flexible blades; 21-Sand guiding groove; 201 - Sand flushing pit area; 202-Offshore wind turbine pile foundation. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. 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, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0028] like Figure 1As shown in the figure, this application embodiment provides a dynamic umbrella-shaped sedimentation device, which is applied and installed on an offshore wind turbine pile foundation 202. The dynamic umbrella-shaped sedimentation device includes: an umbrella-shaped support 10 fixedly connected to the offshore wind turbine pile foundation 202, and an umbrella-shaped induction assembly connected to the umbrella-shaped support 10. The umbrella-shaped induction assembly includes a rotating support structure installed inside the umbrella-shaped support 10, and a plurality of flexible blades 20 arranged horizontally circumferentially along the rotating support structure. Each flexible blade 20 is located at the bottom of the umbrella-shaped support 10 and extends outward in a radial direction to form an umbrella-shaped structure. Each flexible blade 20 is laterally inclined, and each flexible blade 20 has a sand-guiding groove 21 on its surface. The sand-guiding groove 21 leads downward toward the sand flushing pit area 201, thereby realizing the function of automatically guiding sand to the sand flushing pit area 201 and realizing the dynamic protection and automatic repair of the sand flushing pit.

[0029] Compared with existing technologies, during the construction phase of offshore wind turbine foundations, after the foundation piling is completed, this dynamic umbrella-shaped sedimentation device can be installed on the offshore wind turbine pile foundation 202, and each flexible blade 20 can be deployed on the seabed surface. Activating the rotating support structure causes the umbrella-shaped structure formed by the multiple flexible blades 20 to rotate horizontally at the bottom of the umbrella-shaped support 10 (i.e., above the sand flushing pit area 201). A low-pressure zone is formed below this umbrella-shaped structure, causing more sediment to be attracted and deposited in this low-pressure zone due to pressure difference. Some sediment is directly deposited in the sand flushing pit area 201 below, while some is induced into the sand guiding grooves 21 within the flexible blades 20 and guided into the sand flushing pit area 201 for accumulation and deposition.

[0030] This enables dynamic induction of quicksand to automatically fill and accumulate sediment, achieving dynamic protection and automatic repair capabilities for scour pits, greatly reducing the repair cycle, improving safety, and achieving low energy consumption and low maintenance costs. Furthermore, the structure of the dynamically rotating and laterally tilting flexible blades 20 also greatly reduces quicksand blockage, resulting in low maintenance costs and extending the service life of the protective structure.

[0031] Regarding the aforementioned rotating support structure, this application provides the following three optional embodiments.

[0032] One optional embodiment is as follows: Figure 1 As shown, the umbrella tray support 10 can be configured as a rotatable cylindrical structure, which can be arranged along... Figure 1Rotating in the direction of the arrow, the inner wall of the cylindrical structure is fixedly connected to the outer periphery of the offshore wind turbine pile foundation 202. The roots of the aforementioned flexible blades 20 are connected to the bottom circumferential direction of the cylindrical structure, and a first drive motor is provided inside the cylindrical structure to drive its rotation. The rotational support structure may specifically include the rotatable cylindrical structure and the first drive motor. This method is simple, convenient, and highly reliable.

[0033] Another optional embodiment is that the umbrella tray support 10 may have an inner cylinder inside, and the umbrella tray support 10 also has an outer shell. The inner cylinder is located inside the outer shell, and the inner wall of the inner cylinder is fixedly connected to the outer periphery of the offshore wind turbine pile foundation 202. Specifically, the inner cylinder may be configured as a rotatable rotating inner cylinder. The root of each flexible blade 20 is connected to the bottom outer periphery of the rotating inner cylinder. The rotating support structure may include the rotating inner cylinder and a first drive motor that drives the rotating inner cylinder to rotate. Since the outer wall is more easily worn and damaged due to the rotating inner cylinder's operation, in this embodiment, the rotating inner cylinder and the first drive motor may be set inside the outer shell for protection, effectively protecting the internal rotating components and improving their service life.

[0034] Another optional embodiment, similar to the previous embodiment, may include an inner cylinder inside the umbrella tray support 10, with an outer shell. The inner cylinder is located within the outer shell, and its inner wall is fixedly connected to the outer periphery of the offshore wind turbine pile foundation 202. The difference is that the rotating support structure in this embodiment may include a rotating bearing sleeved and connected to the bottom outer periphery of the inner cylinder, and a first drive motor that drives the rotating bearing to rotate. The roots of each flexible blade 20 are connected to the outer periphery of the rotating bearing. In this embodiment, the inner cylinder is a fixed inner cylinder, and rotation is achieved by sleeved and connected to the outer periphery of the inner cylinder. This further reduces the rotation range of the rotating components, resulting in stronger stability and connection robustness of the fixed inner cylinder, and greater reliability of the connection with the offshore wind turbine pile foundation 202.

[0035] In a preferred embodiment, each flexible blade 20 is rotatable and detachably connected. Specifically, the horizontal bottom outer periphery of the cylindrical structure or rotating inner cylinder in the aforementioned embodiments, or the horizontal outer periphery of the rotating bearing, may be provided with multiple blade connection holes. The root of each flexible blade 20 is detachably and rotatably connected and fixed to each blade connection hole.

[0036] Specifically, each blade connection hole is provided with an outwardly extending rotating shaft, which is assembled and connected to the root of the flexible blade 20 to drive the flexible blade 20 to rotate. Specifically, the rotating shaft is the rotation center and can rotate 360° laterally. The umbrella disc support 10 can be equipped with a second drive motor that is driven and connected to each rotating shaft to realize the rotation drive control of each flexible blade 20.

[0037] Based on the aforementioned embodiments, a further embodiment is that each rotating shaft may be fitted with an angle positioning structure. The angle positioning structure may be configured as an indexing gear, spline, or multi-stage ratchet, etc., which can control and position the rotation angle. The angle positioning structure is also electrically connected to the second drive motor. The umbrella disc support 10 may also be equipped with a control module, which is electrically connected to the second drive motor to control the second drive motor to rotate the flexible blades 20 to a predetermined specified angle, thereby controlling the rotation angle of each flexible blade 20.

[0038] In a further embodiment, the control module can also be electrically connected to the aforementioned first drive motor to control each flexible blade 20 to rotate at a preset rotation speed, thereby controlling the dynamic rotation speed of the umbrella-shaped structure formed by each flexible blade 20.

[0039] Because tidal flows are periodic, the direction and velocity of sediment flow will change at different times. Therefore, the specific settings can be preset according to the direction and velocity of the tidal flow at different times, or automatically adjusted by sensing the current direction and velocity of sediment flow.

[0040] Regarding the pre-setting of the direction and velocity intensity of the tidal current at different time periods, a specific embodiment can be that the rotation angle of each flexible blade 20 connected to the second drive motor can be pre-set according to the direction of the tidal current at different time periods, so that each flexible blade 20 is tilted in the direction facing the tidal current. This can enhance the flow rate of intercepted sediment, increase the speed of automatic repair of the sand flushing pit, and speed up the repair time. The rotation speed of the first drive motor can be pre-set according to the velocity intensity of the tidal current at different time periods, so that each flexible blade 20 rotates around the rotating support structure along the horizontal plane at a suitable rotation speed, thereby improving the repair rate of automatically filling the sand flushing pit.

[0041] Regarding the automatic adjustment of settings based on the current flow direction and velocity intensity of sediment, one specific embodiment is that the umbrella tray support 10 may also be equipped with a flow velocity sensor inside. The flow velocity sensor is electrically connected to the aforementioned control module. The flow velocity sensor can sense the flow direction and velocity intensity of the tidal current and transmit the sensed flow direction and velocity information to the control module.

[0042] Then, the control module controls each second drive motor to drive each rotating shaft according to the received flow direction information, thereby driving each flexible blade 20 to rotate to a specified angle (the angle position is positioned by the angle positioning structure). The specified angle is the lateral tilt angle corresponding to the direction of the tidal flow. This realizes the automatic control of the tilt angle of each flexible blade 20 according to the tidal flow response, so that each flexible blade 20 is adjusted to tilt in the direction of the tidal flow. This can enhance the flow rate of the flexible blades 20 to intercept the deposited sand, intercept more sand to be deposited in the sand flushing pit, increase the filling speed of the sand flushing pit, that is, increase the speed of automatic repair of the sand flushing pit, and speed up the repair.

[0043] In addition, the control module can control the rotation speed of the first drive motor according to the received flow velocity information, so as to automatically control the rotation speed of the umbrella-shaped structure formed by each flexible blade 20 according to the tidal response, so that each flexible blade 20 rotates around the rotating support structure along the horizontal plane at a suitable rotation speed, thereby further improving the repair rate of dynamic guidance of quicksand automatic filling.

[0044] In a preferred embodiment, the dynamic umbrella-shaped induced sedimentation device of this application can automatically open and close and automatically repair itself based on the depth of the sand flushing pit. Specifically, the umbrella-shaped support 10 may also be equipped with a multi-wavelength scanner to scan and sense the depth of the sand flushing pit. The multi-wavelength scanner is electrically connected to the control module, transmitting the sensed sand flushing pit depth data to the control module. The control module is also electrically connected to the start / stop drive module of the dynamic umbrella-shaped induced sedimentation device.

[0045] When the depth data of the scour pit received by the control module is less than the preset safety threshold, the start / stop drive module does not start or stops, and the scour pit does not need to be repaired. When the depth data of the scour pit received by the control module is greater than or equal to the preset safety threshold, the start / stop drive module starts and performs scour pit repair work. This enables the automatic activation and deactivation of the scour pit repair function based on the depth of the scour pit, further reducing safety issues caused by the scour pit depth exceeding the safety threshold and improving safety.

[0046] In another specific embodiment, the umbrella disc support 10 can be fixedly installed on the offshore wind turbine pile foundation 202 by nesting a locking ring or a flange ring to support the operation of the entire umbrella disc induction assembly.

[0047] Another specific embodiment is, as follows: Figure 1As shown, the sand-guiding groove 21 can specifically be an arc-shaped or straight strip-shaped channel, with two openings at opposite ends serving as inlet and outlet ports. The downward-sloping sand-flushing pit is the outlet port, and the other is the inlet port. One of these openings is directly connected to the side of the flexible blade 20 near its root, and the other opening is directly connected to the other side of the flexible blade 20 away from its root. Furthermore, preferably, the extension length of the flexible blade 20 is greater than or equal to the diameter of the offshore wind turbine pile foundation 202.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A dynamic umbrella-disc induced deposition device, characterized in that, include: The umbrella-shaped support frame is connected and fixed to the offshore wind turbine pile foundation; and The umbrella disc guiding assembly includes a rotating support structure installed inside the umbrella disc bracket, and a plurality of flexible blades arranged in a horizontal circumferential direction along the rotating support structure. Each of the flexible blades is located at the bottom of the umbrella disc bracket and extends outward in a radial direction to form an umbrella disc-shaped structure. Furthermore, each of the flexible blades is arranged at a lateral inclination, and the surface of each flexible blade is provided with a sand-guiding groove, the outgoing direction of which is towards the sand-flushing pit area below.

2. The dynamic umbrella-disc induced deposition apparatus according to claim 1, characterized in that, The umbrella-shaped support is configured as a rotatable cylindrical structure, with its inner wall fixedly connected to the outer periphery of the offshore wind turbine pile foundation. The roots of each flexible blade are connected to the bottom circumferential direction of the cylindrical structure. A first drive motor for driving the cylindrical structure to rotate is provided inside the cylindrical structure; or The umbrella tray support has an inner cylinder inside, and the umbrella tray support has an outer shell. The inner cylinder is located inside the outer shell, and the inner wall of the inner cylinder is fixedly connected to the outer periphery of the offshore wind turbine pile foundation.

3. The dynamic umbrella-disc induced deposition apparatus according to claim 2, characterized in that, The inner cylinder is configured as a rotatable rotating inner cylinder, and the root of each of the flexible blades is connected to the bottom outer periphery of the rotating inner cylinder. The rotating support structure includes the rotating inner cylinder and a first drive motor that drives the rotating inner cylinder to rotate. or The rotating support structure includes a rotating bearing sleeved and connected to the bottom outer periphery of the inner cylinder and a first drive motor that drives the rotating bearing to rotate, with the root of each flexible blade connected to the outer periphery of the rotating bearing.

4. The dynamic umbrella-disc induced deposition apparatus according to claim 3, characterized in that, The cylindrical structure or the outer circumference of the horizontal bottom of the rotating inner cylinder, or the outer circumference of the rotating bearing, is provided with a plurality of blade connection holes. Each blade connection hole is provided with a rotating shaft extending outward. The rotating shaft is assembled and connected to the root of the flexible blade to drive the flexible blade to rotate. The umbrella disc bracket is provided with a second drive motor that is driven and connected to each of the rotating shafts.

5. The dynamic umbrella-disc induced deposition apparatus according to claim 4, characterized in that, An angle positioning structure is sleeved and connected to each of the said rotating shafts. The angle positioning structure is configured as an indexing gear, spline, or multi-stage ratchet. The umbrella disc support is also equipped with a control module, which is electrically connected to the second drive motor. The second drive motor is electrically connected to each of the rotating shafts and the angle positioning structure set on them, so as to control each of the flexible blades to rotate to a preset specified angle.

6. The dynamic umbrella-disc induced deposition apparatus according to claim 5, characterized in that, The control module is also electrically connected to the first drive motor to control each of the flexible blades to rotate at a preset rotation speed.

7. The dynamic umbrella-disc induced deposition apparatus according to claim 6, characterized in that, The umbrella tray support is also equipped with a flow velocity sensor, which can sense the direction and intensity of the tidal flow. The flow velocity sensor is electrically connected to the control module and transmits the sensed flow direction and flow velocity information to the control module. The control module controls each of the second drive motors to drive each of the rotating shafts to rotate to a specified angle based on the received flow direction information. The specified angle is the lateral tilt angle corresponding to the direction of the current flow. The control module controls the rotational speed of the first drive motor based on the received flow rate information.

8. The dynamic umbrella-disc induced deposition apparatus according to claim 1, characterized in that, The umbrella disc support is also equipped with a multi-wave speed scanner to scan and sense the depth of the sand flushing pit. It is electrically connected to the control module and transmits the sensed sand flushing pit depth data to the control module. The control module is electrically connected to the start / stop drive module of the dynamic umbrella disc induced deposition device. When the depth data of the sand flushing pit received by the control module is less than the preset safety threshold, the start-stop drive module does not start or stops; when the depth data of the sand flushing pit received by the control module is greater than or equal to the preset safety threshold, the start-stop drive module starts.

9. The dynamic umbrella-disc induced deposition apparatus according to claim 1, characterized in that, The sand-guiding groove is an arc-shaped or straight strip-shaped channel, with two openings at opposite ends serving as inlet and outlet ports. One of the openings is directly connected to the side of the flexible blade near its root, and the other opening is directly connected to the other side of the flexible blade away from its root.

10. The dynamic umbrella-disc induced deposition apparatus according to claim 1 or 9, characterized in that, The umbrella-shaped support is fixedly installed on the offshore wind turbine pile foundation by nesting locking rings or flange rings; and / or The extension length of the flexible blade is greater than or equal to the diameter of the offshore wind turbine pile foundation.

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