Submersible mud floating type offshore wind turbine system

Abstract

The invention relates to the technical field of offshore wind turbines, in particular to a submersible mud floating type offshore wind turbine system. The submersible mud floating type offshore wind power structure system can be flexibly suitable for different water depths and marine environments, the whole structure system is in a suspended state during normal work, the structure system enables the structure to sink to be in a mud floating state through an anchor chain and gas-water replacement operation in an extreme marine environment, and after the extreme marine environment, the structure system is in a floating state. The structure floats upwards and is in a suspended state through an anchor chain and gas-water replacement operation, and work continues to be carried out; the suspension state of the submersible mud floating type offshore wind power structure system is divided into a semi-submersible state and a full-submersible state, and the submersible mud floating type offshore wind power structure system is suitable for wind energy resources of different heights and has the advantage of fully developing offshore wind energy resources; the buoy of the submersible mud floating type offshore wind power structural system can be filled with water and air, and state conversion of the structure is achieved through air-water replacement.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind turbines, and in particular to a submersible mud-floating offshore wind turbine system. Background Art

[0002] As the energy crisis becomes increasingly pressing, offshore wind power, as a renewable energy source, has become a crucial component of the current energy mix and a crucial energy source for resolving the crisis. However, existing technologies for mud-floating offshore wind turbines are limited to two operating states (suspended and mud-floated), making them difficult to flexibly adapt to varying water depths and marine environments.

[0003] Therefore, there is an urgent need to provide a submersible mud-floating offshore wind turbine system to solve the above technical problems. Summary of the Invention

[0004] The present invention provides a submersible mud-floating offshore wind turbine system that can be flexibly adapted to different water depths and marine environments.

[0005] An embodiment of the present invention provides a submerged mud-floating offshore wind turbine system, comprising a wind turbine, a tower, a foundation and a pedestal connected in sequence from top to bottom, wherein the foundation comprises a connecting component that moves up and down along the tower, a plurality of diagonal braces connected to the connecting component, a side buoy connected to each of the diagonal braces, a side rod connected to every two adjacent side buoys, a cross rod connected to each of the side buoys, a middle buoy connected to all of the cross rods and a bottom plate connected to each of the side buoys, wherein the middle buoy is arranged on the upper side of the tower. At the end, the bottom plate is used to abut against the base, and the side buoy and the middle buoy are both provided with an angle sensor and an air-water displacement valve. The angle sensor is used to detect the inclination change of the float, and the air-water displacement valve is used to adjust the air-water ratio in the float based on the inclination change to adjust the center of gravity of the float. The side buoy is connected with a lateral anchor chain and an anchor in sequence, and a vertical anchor chain is connected between the side buoy and the base. The working states of the submerged mud-floating offshore wind turbine foundation include fully submerged suspended state, semi-submerged suspended state and mud-floating state.

[0006] Beneficial effects:

[0007] According to the submersible mud-floating offshore wind turbine system provided by the embodiment of the present invention, the submersible mud-floating offshore wind power structure system can be flexibly adapted to different water depths and marine environments. During normal operation, the entire structure system is in a suspended state. In extreme marine environments, the structure system is sunk into a mud-floating state through anchor chains and air-water displacement operations. After the extreme marine environment, the structure is floated into a suspended state through anchor chains and air-water displacement operations to continue working. The suspended state of the submersible mud-floating offshore wind power structure system of the present invention is subdivided into semi-submerged and fully submerged states, which are applicable to wind energy resources at different heights and have the advantage of fully developing offshore wind energy resources. The buoy of the submersible mud-floating offshore wind power structure system of the present invention can be filled with water and air, and the structure can achieve state conversion through air-water displacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0009] Figure 1 This is a schematic structural diagram of a submersible mud-floating offshore wind turbine according to an embodiment of the present invention;

[0010] Figure 2 for Figure 1 The submersible mud-floating offshore wind turbine is shown in a front view in a fully submerged and suspended state;

[0011] Figure 3 for Figure 1 The submersible mud-floating offshore wind turbine is shown in a front view in a semi-submerged suspended state;

[0012] Figure 4 for Figure 1 The front view of the submersible mud-floating offshore wind turbine shown is in a mud-floating state;

[0013] Figure 5 for Figure 1 The structure diagram of the foundation of the submersible mud-floating offshore wind turbine shown is shown in one perspective;

[0014] Figure 6 for Figure 1 A structural schematic diagram of a base in a submersible mud-floating offshore wind turbine is shown;

[0015] Figure 7 for Figure 5 A schematic diagram of the structure of the foundation shown in another perspective;

[0016] Figure 8 for Figure 1Another structural schematic diagram of the base of a submersible mud-floating offshore wind turbine is shown;

[0017] Figure 9 for Figure 8 an enlarged schematic diagram of the base shown;

[0018] Figure 10 for Figure 1 The schematic diagram of the structure of the anchor in the submersible mud-floating offshore wind turbine is shown.

[0019] Reference numerals:

[0020] 1-wind turbine; 2-tower; 3-foundation; 31-connecting parts; 32-bracing; 33-side buoys; 34-side rods; 35-crossbar; 36-middle buoys; 37-bottom plate; 4-base; 40-serrated structure; 41-groove; 42-substructure; 5-lateral anchor chain; 6-anchor; 7-vertical anchor chain;

[0021] 1a-robotic arm grab bucket; 2a-vibrating rod; 3a-mud suction pump; 4a-camera; 5a-spiral blade; 6a-air outlet; 7a-annular belt; 8a-first water outlet; 9a-water inlet; 10a-booster; 11a-second water outlet; 12a-flushing pipe. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] like Figures 1 to 5As shown, an embodiment of the present invention provides a submersible mud-floating offshore wind turbine system, comprising a wind turbine 1, a tower 2, a foundation 3 and a base 4 connected in sequence from top to bottom, wherein the foundation 3 comprises a connecting component 31 that moves up and down along the tower 2, a plurality of diagonal braces 32 connected to the connecting component 31, a side buoy 33 connected to each diagonal brace 32, a side bar 34 connected to every two adjacent side buoys 33, a cross bar 35 connected to each side buoy 33, a middle buoy 36 connected to all the cross bars 35, and a bottom plate 37 connected to each side buoy 33, wherein the middle buoy 36 is connected to the bottom plate 37. Arranged at the end of the tower 2, the bottom plate 37 is used to abut against the base 4. The side buoy 33 and the middle buoy 36 are both provided with angle sensors and air-water displacement valves (not shown in the figure). The angle sensor is used to detect the inclination change of the float. The air-water displacement valve is used to adjust the air-water ratio in the float based on the inclination change to adjust the center of gravity of the float. The side buoy 33 is connected with the lateral anchor chain 5 and the anchor 6 in sequence. A vertical anchor chain 7 is connected between the side buoy 33 and the base 4. The working states of the submerged mud-floating offshore wind turbine foundation include fully submerged suspended state, semi-submerged suspended state and mud-floating state.

[0024] In this embodiment, the submerged mud-floating offshore wind power structure system can be flexibly adapted to different water depths and marine environments. During normal operation, the entire structure system is in a suspended state. In extreme marine environments, the structure system is sunk into a mud-floating state through anchor chains and air-water displacement operations. After the extreme marine environment, the structure is floated up into a suspended state through anchor chains and air-water displacement operations to continue working. The suspended state of the submerged mud-floating offshore wind power structure system of the present invention is subdivided into semi-submerged and fully submerged states, which are applicable to wind energy resources at different heights and have the advantage of fully developing offshore wind energy resources. The buoy of the submerged mud-floating offshore wind power structure system of the present invention can be filled with water and air, and the structure can achieve state conversion through air-water displacement.

[0025] In other words, through the air-water displacement operation, mud-floating offshore wind turbines are flexibly adapted to different conditions and marine environments. Inflation primarily provides buoyancy for the entire structure, maintaining its stable operation. Water filling increases the overall weight of the structure, and the structure sinks to complete installation and transition between states. The wind turbine's mooring and air-water displacement are adjusted according to the marine environment, allowing the structure to be positioned in various positions, such as semi-submerged and fully submerged. This invention increases the feasibility of mud-floating offshore wind turbines, particularly in complex marine environments, demonstrating the unique advantages and broad application prospects of submersible mud-floating systems.

[0026] Specifically, the base plate 37 and the foundation 4 are connected by vertical anchor chains 7. When the structure is suspended, the foundation 3 and the foundation 4 are separated by a certain vertical distance. When the structure is in a mud-floating state, the foundation 3 is completely seated on the foundation 4, and the vertical anchor chains 7 are fully tightened. The lateral anchor chains 5 and the vertical anchor chains 7 are used in conjunction with each other to ensure that the structure can achieve safe and efficient state transitions. The lateral anchor chains 5 can be adjusted in direction and position through the lifting rings of the anchor foundation to better adapt to changes in the state of the structure and ensure the optimal position of the lateral anchor chains 5.

[0027] Through the air-water replacement operation and the simultaneous release of the anchor chain, when the entire structural system needs to rise, the buoyancy of the structure is made greater than the gravity by inflating the buoyancy into the buoyancy chamber, and the structure rises to a fully submerged mud-floating state. As it continues to rise, the structure is in a semi-submerged mud-floating state. In extreme marine environments, by filling the buoyancy chamber with water and retracting the anchor chain, the gravity of the structure is made greater than the buoyancy, and the structure sinks to a semi-submerged and fully submerged suspended state, and finally to a mud-floating state. A submersible mud-floating offshore wind turbine means that the wind turbine foundation can be converted between a fully submerged suspended state, a semi-submerged suspended state and a mud-floating state. The fully submerged suspended state means that the wind turbine foundation is suspended in the seawater. In this state, the upper wind turbine works at a higher height, which is conducive to improving power generation efficiency and is suitable for conditions with better marine environment; the semi-submerged suspended state means that the wind turbine foundation is suspended on the sea surface. In this state, the upper wind turbine works at the highest height, which is more conducive to improving power generation efficiency and is also suitable for conditions with better marine environment; the mud-floating state means that the wind turbine foundation is fixed in the mud layer on the seabed. In this state, the upper wind turbine works at a lower height, which is conducive to improving safety and is suitable for conditions with harsher marine environment.

[0028] In some embodiments, the bottom of the middle buoy 36 is spherical, which facilitates the contact of the entire structure with the seabed when in a mud-floating state, and is also conducive to floating when the mud-floating state is converted to a suspended state.

[0029] like Figure 6 and Figure 8 As shown, in one embodiment of the present invention, the interior of the base 4 is a hollow structure, which is suitable for different seabed terrains and can be widely used in different ocean terrains.

[0030] In one embodiment of the present invention, a serrated structure 40 is provided on the bottom edge of the base 4 to facilitate the base 4 to be inserted into the soil during installation and to increase the subsequent bearing capacity of the base 4.

[0031] In one embodiment of the present invention, a plurality of grooves 41 are provided on the base 4 , and the grooves 41 are connected to the side buoys 33 through vertical anchor chains 7 .

[0032] In one embodiment of the present invention, an annular belt 7a is provided on the inner edge of the base 4. The height of the annular belt 7a exceeds the main body of the base 4 to prevent silt and other impurities from entering.

[0033] In the related art, during the installation and conversion from a suspended state to a mud-floating state of a submersible mud-floating offshore wind turbine, a large amount of silt and stones will appear at the bottom of the base, which is not conducive to the foundation being embedded in the base.

[0034] In order to solve this technical problem, Figure 8 and Figure 9 As shown, in one embodiment of the present invention, a silt clearing device is further included, and the silt clearing device includes:

[0035] The mechanical arm grab bucket 1a provided on the outer wall of the base 4 is used to remove stones and upper silt inside the base 4;

[0036] The vibrating rod 2a is provided inside the base 4 and is used to loosen the lower layer of silt inside the base 4;

[0037] The sludge suction pump 3 a provided on the annular belt 7 a is used to suck the loosened lower layer sludge out of the base 4 .

[0038] In this embodiment, during installation, the device first desilts the seabed to facilitate smooth installation of the mud-floating foundation 3 and pedestal 4. When encountering extreme marine conditions requiring transition from a suspended state to a mud-floating state, the device first desilts pedestal 4 to allow the foundation 3 to be fully embedded within it. This technology features thorough desilting, a wide range of applications, and high operational efficiency, providing a strong guarantee for the stable operation and smooth state transition of the offshore wind turbine foundation 3.

[0039] Specifically, when foundation 3 transitions from a suspended state to a mud-floating state, a large amount of silt at the bottom of base 4 needs to be cleared before foundation 3 can be fully integrated with base 4. At this point, a remotely controlled robotic grab 1a is used to roughly remove the large silt and rocks accumulated on the upper portion. The vibrating rod 2a is then activated to vibrate and loosen the accumulated silt within base 4. The loosened silt is then sucked out using the sludge pump 3a, completing the silt removal work on base 4 and enabling the structure to better complete the state transition. When the structure is in the mud-floating state, the robotic grab 1a is positioned at the side wall of base 4, leaving space for foundation 3 to sink.

[0040] In one embodiment of the present invention, the bottom of the vibration rod 2a is a conical structure (not shown in the figure) so as to better insert it into the mud.

[0041] like Figure 7 As shown, in one embodiment of the present invention, a spiral blade 5a is provided at the outer bottom of the foundation 3 and can rotate as the foundation 3 rises and sinks.

[0042] In this embodiment, a spiral blade 5a is mounted at the bottom of foundation 3. A vertical anchor chain is connected to its central axis. The blade 5a rotates as foundation 3 rises and sinks, and can also be activated and controlled by a motor. This device is designed to remove marine life from the underside of foundation 3, remove entanglement and adhesion of flexible vegetation such as cut aquatic plants to the anchor chain, and prevent the impact of impurities during the extension and retraction of the anchor chain, ensuring that the structure can smoothly complete state transitions.

[0043] In one embodiment of the present invention, each groove 41 corresponds to a spiral blade 5a, and the inner wall surface of each groove 41 is provided with a plurality of air outlet holes 6a to exhaust air outward in a centralized manner to remove the silt deposited in that part, thereby preventing excessive silt deposition from hindering the normal operation of the anchor chain, and playing a vital role in maintaining the stable state transition of the mud-floating structure.

[0044] In one embodiment of the present invention, a plurality of partition plates 42 are provided inside the base 4, and the partition plates 42 are used to divide the cavity inside the base 4 into a plurality of compartments, each compartment is provided with a vibrating rod 2a, and each compartment corresponds to a robotic arm grab 1a and a mud suction pump 3a.

[0045] In this embodiment, the base 4 utilizes a compartmentalized approach, with the hexagonal structure of the foundation 3 being equally divided into six compartments via compartment plates 42. Each compartment independently handles dredging tasks, reducing the overall difficulty of dredging. Each compartment is equipped with a dredge pump 3a, one end of which is connected to the interior of the base 4 compartment and the other end to the external marine environment. The dredge pump 3a, in conjunction with the vibrating rod 2a, can completely remove silt that is difficult for the robotic grab 1a to remove, ensuring cleanliness within the base 4 and providing bottom space for the structure to transition from a suspended state to a mud-floating state, allowing the foundation 3 to be fully integrated into the base 4.

[0046] In some embodiments, the annular belt 7a is connected to the compartment plate 42 .

[0047] In one embodiment of the present invention, a micro pump (not shown in the figure) is provided inside the annular belt 7a, and a plurality of first water outlet holes 8a connected to the micro pump are provided on the outside of the annular belt 7a to flush the silt deposited on the upper part of the base 4 by spraying high-pressure water flow, thereby preventing the silt from accumulating and hindering the sinking of the foundation 3.

[0048] like Figure 10 As shown, in one embodiment of the present invention, the side wall of the anchor 6 is provided with a water inlet 9a, a booster 10a is provided inside, and a second water outlet 11a is provided on the bottom wall. The water inlet 9a, the booster 10a and the second water outlet 11a are connected in sequence.

[0049] In this embodiment, during the sinking process of the anchor 6, the water inlet 9a absorbs water. When the anchor 6 is about to reach the mud surface, the second water outlet 11a is opened and the supercharger 10a is used to spray high-pressure water outward to flush the silt on the bottom of the ocean, loosening and suspending the seabed mud layer, which has a good effect on softer mud and sediments, thereby making the seabed surface where the anchor 6 is located smoother.

[0050] In one embodiment of the present invention, a flushing pipe 12a is provided on the top of the anchor 6, the water inlet 9a, the booster 10a and the flushing pipe 12a are connected in sequence, and the outlet of the flushing pipe 12a faces the lateral anchor chain 5.

[0051] In this embodiment, the lateral anchor chain 5 is in contact with the transmission gear arranged in the anchor 6. Two flushing pipes 12a are installed on the upper part of the anchor 6. The flushing pipes 12a can use the supercharger 10a to spray high-pressure water outward to flush the marine organisms attached to the lateral anchor chain 5, and at the same time clean the lateral anchor chain 5 to prevent the lateral anchor chain 5 from rusting and the large amount of marine organisms attached to make it difficult for the lateral anchor chain 5 to retract normally.

[0052] like Figure 7 As shown, in one embodiment of the present invention, a camera 4a is provided at the central bottom of the foundation 3, and the camera 4a is used to perform visual operation of the robotic arm grab 1a in conjunction with a rear-end remote control system (not shown in the figure).

[0053] In this embodiment, an underwater visualization camera 4a is installed at the bottom sphere of foundation 3. When foundation 3 transitions from a suspended state to a mud-floating state, foundation 3 descends. When the visualization of the underwater camera 4a on base 4 reaches a certain range and clarity, workers can remotely control the robotic arm grab 1a via a computer. Combined with the underwater visualization camera 4a, dredging and desilting operations can be performed intuitively and conveniently. When desilting is completed, the robotic arm grab 1a rotates back to the outside of foundation 3, leaving space for foundation 3 to sink. The underwater visualization camera 4a can monitor the silt accumulation at the bottom of the mud-floating structure in real time and, in conjunction with computer-aided equipment, control the robotic arm grab 1a to perform targeted desilting operations on base 4. This technology makes desilting intuitive and convenient, reducing the difficulty of desilting.

[0054] In some embodiments, the robotic arm grab 1a can be remotely controlled by a computer through digital twin technology, which will not be described in detail here.

[0055] It should be noted that, in this document, relational terms such as primary and secondary are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical factors in the process, method, article, or device comprising the element.

[0056] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is intended only to illustrate the technical solution of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A submersible mud-floating offshore wind turbine system, characterized in that: The wind turbine of the present invention is a wind turbine that is installed in the wind turbine of the present invention. The wind turbine of the present invention has a wind turbine that is installed in the wind turbine of the present invention. The wind turbine of the present invention has a wind turbine that is installed in the wind turbine of the present invention. The wind turbine of the present invention is a wind turbine that is installed in the wind turbine of the present invention. The wind turbine of the present invention is a wind turbine that is installed in the wind turbine of the present invention.

2. The system according to claim 1, wherein: The interior of the base is a hollow structure.

3. The system according to claim 2, characterized in that The bottom edge of the base is provided with a serration structure.

4. The system according to claim 3, characterized in that The base is provided with a plurality of grooves, and the grooves are connected to the side buoys through the vertical anchor chains.

5. The system according to claim 4, characterized in that An annular belt is provided on the inner edge of the base, and the height of the annular belt exceeds the main body of the base.

6. The system according to claim 5, characterized in that The invention also includes a silt clearing device, the silt clearing device comprising: A mechanical arm grab bucket provided on the outer side wall of the base is used to remove stones and upper silt inside the base; A vibrating rod disposed inside the base, used to loosen the lower layer of silt inside the base; The sludge suction pump arranged on the annular belt is used to suck the loosened lower layer sludge out to the outside of the base.

7. The system according to claim 6, characterized in that The outer bottom of the foundation is provided with a spiral blade which can rotate as the foundation floats up and sinks.

8. The system according to claim 7, characterized in that Each of the grooves corresponds to one of the spiral blades, and the inner wall surface of each of the grooves is provided with a plurality of air outlet holes.

9. The system according to claim 6, wherein: A micro pump is provided inside the annular belt, and a plurality of first water outlet holes connected to the micro pump are provided outside the annular belt.

10. The system according to claim 9, characterized in that The side wall of the anchor is provided with a water inlet, a booster is provided inside, and a second water outlet is provided on the bottom wall, wherein the water inlet, the booster and the second water outlet are connected in sequence; A flushing pipe is provided on the top of the anchor, the water inlet, the booster and the flushing pipe are connected in sequence, and the outlet of the flushing pipe faces the lateral anchor chain.

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