Ice resistant device and ice resistant method for offshore wind power foundations adjustable to sea currents

Abstract

The application relates to an ice-resistant device and ice-resistant method of a sea wind power foundation capable of being adjusted according to sea current, which comprises an ice-resistant component, a vane assembly and a connecting section. The ice-resistant component is composed of an ice-breaking rod, a spring and a movable collar. The ice-breaking rod is divided into upper and lower ice-breaking rods, and the two are connected through a hinge. The hinge is fixed to the outside of a steel pipe pile and the movable collar respectively. The spring is fixedly connected to the steel pipe pile and the movable collar at two ends. The vane assembly comprises blades, an opening and closing control switch and a vane sleeve. The blades are uniformly arranged outside the vane sleeve. The vane sleeve is screw-connected to the steel pipe pile. The opening and closing control switch controls the opening and closing of the blades. The vane assembly of the application can rotate and rise around the steel pipe pile under the impact of sea current in all directions, drive the angle change between the upper and lower ice-breaking rods, and play a role in destroying sea ice and reducing the probability of structural ice vibration. When the effect of the sea current is weakened, the spring rebounds to press down the movable collar, so that the ice-resistant device gradually returns to the original position.

Description

Technical Field

[0001] This invention relates to an anti-icing device and method for offshore wind power foundations that can be adjusted with ocean currents, applicable to the offshore wind power industry. Background Technology

[0002] With the widespread use of steam engines, fossil fuels became the primary source of energy for social production. However, the ensuing climate change has posed a significant threat to global ecology and human life. Therefore, energy conservation, emission reduction, and the effective utilization of clean energy have gradually become global hot topics. Under strong national policy support, the green new energy industry, represented by wind power, has experienced rapid development in recent decades. Wind energy, with its wide range of applications, simple application methods, and huge reserves, has become a renewable energy sector that countries are vying to develop in the new era. Compared to onshore wind power, offshore wind power has significant advantages, including abundant resources and less interference with land, making it a key development direction for the new energy industry. Since the 1990s, offshore wind power has been extensively developed and put into operation. Even today, the construction of offshore wind farms continues to advance rapidly. In 2021, the global newly installed offshore wind power capacity reached 21.1 GW, more than three times that of 2020.

[0003] With the continuous expansion of nearshore wind farms, offshore wind farm projects are gradually developing towards higher latitude sea areas. Frequent intrusions of cold air cause sea surface ice to form. Under the influence of wind and waves, the wind turbine foundations will continuously suffer from the impact of large areas of ice, resulting in significant vibration and deformation responses. This affects the normal operation of the units, and in severe cases, can lead to structural overturning and instability, or premature fatigue failure of the wind turbines, reducing their service life. Therefore, the structural design of offshore wind turbines should consider how to mitigate the effects of sea ice.

[0004] It is known that the bending failure strength of sea ice is significantly less than its compressive strength. Therefore, the piles at the waterline location of marine structures can be designed with angles to alter the sea ice fragmentation pattern, effectively reducing the force exerted by sea ice on the structure and lowering the likelihood of ice-induced vibrations. Furthermore, existing research indicates that the drift velocity of floating ice in strong current areas is primarily determined by the current velocity, and the ice direction is generally consistent with the current direction.

[0005] The presence of traditional ice cones increases the waterline area of ​​monopile foundations, leading to a sharp increase in wave loads and threatening the safety of offshore wind turbines. Furthermore, traditional ice cones are fixed components; their installation location and ice-resistant angle are determined during design and construction, and cannot be flexibly adjusted according to actual ice conditions. Therefore, relying on the consistency of ice velocity and direction with ocean currents, a targeted anti-icing device for offshore wind turbine foundations that can adjust with ocean currents is designed. This device utilizes the abundant ocean energy in the currents to effectively counteract the effects of sea ice, reduce the possibility of ice-induced vibrations in the structure, and simultaneously prevent the foundation from bearing excessive wave loads, ensuring the normal operation of the offshore wind farm. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides an anti-icing device for offshore wind turbine foundations that can adjust with ocean currents. It decomposes the traditional anti-icing cone into a hinged assembly of several ice-breaking rods. On one hand, this saves steel, significantly reducing the overall weight of the structure, facilitating transportation and installation, and saving costs. On the other hand, with the assistance of the impeller assembly, the angle and ice-facing height of the anti-icing cone can be automatically adjusted according to the ocean current speed. The blades are powered by the ocean current, eliminating the need for external energy support. This anti-icing device effectively counteracts the effects of sea ice on the foundation, reducing the possibility of ice-induced vibration and improving operational safety. As the ocean current weakens, it automatically returns to its initial state, reducing wave loads on the foundation. An on / off control switch ensures that the device operates only during ice-covered periods and enters a dormant state during non-ice-covered periods, maximizing wave impact reduction, improving structural durability, and significantly extending the service life of the anti-icing device.

[0007] The above-mentioned objective of this invention is achieved through the following technical solutions:

[0008] An anti-icing device for offshore wind turbine foundations that can adjust with ocean currents, comprising:

[0009] An ice-resistant component, surrounding the outside of a steel pipe pile for ice breaking, includes several ice-breaking rods, several springs, and a movable collar. The ice-breaking rods include an upper ice-breaking rod and a lower ice-breaking rod, which are rotatably connected. The upper end of the upper ice-breaking rod is movably connected to the steel pipe pile, and the lower end of the lower ice-breaking rod is movably connected to the movable collar. The movable collar is movably fitted onto the steel pipe pile. The upper and lower ends of the springs are respectively connected to the steel pipe pile and the movable collar for ice resistance.

[0010] The impeller assembly is rotatably connected to the outside of the steel pipe pile and includes several blades and an impeller sleeve. The blades are evenly distributed and connected to the outer wall of the impeller sleeve. The inner wall of the impeller sleeve is provided with internal threads, and the steel pipe pile is provided with external threads at corresponding positions. The steel pipe pile and the impeller sleeve are threadedly connected and used to push the anti-icing component to move up and down to adjust the anti-icing angle and the ice-facing height.

[0011] The aforementioned anti-icing device for offshore wind turbine foundations, which can adjust with ocean currents, further includes a connecting section. This connecting section is movably sleeved on the outside of the steel pipe pile and located between the impeller assembly and the movable collar. By replacing connecting sections of different sizes, the height of the anti-icing component can be adjusted according to ocean current conditions.

[0012] The anti-icing component is a combination of two conical structures with identical bottom shapes and dimensions, one upright and one inverted, which are arranged around the outside of the steel pipe pile. The upper and lower ice-breaking rods are identical in shape, size, and number, and are connected by a hinge, with an adjustable angle. The movable collar can move freely along the steel pipe pile, moving upwards under the thrust of the ocean current, increasing the angle between the upper and lower ice-breaking rods within a certain range to effectively counteract the effect of sea ice, while simultaneously compressing the springs. The springs are evenly spaced; when the movable collar rises, the springs are compressed by the compressive force, and when the thrust of the ocean current decreases, the springs rebound, pushing the movable collar downwards, allowing the entire device to gradually return to its original position.

[0013] The aforementioned anti-icing device for offshore wind power foundations that can be adjusted with ocean currents includes a motor and an opening / closing control switch in the impeller assembly; the blades are evenly connected to the outer wall of the impeller sleeve via rotating shafts, the opening / closing control switch is connected to the motor, and the output shaft of the motor is connected to the blade rotating shaft.

[0014] The impeller sleeve is a circular cylinder with internal threads on its inner wall, which can freely rise and fall under the push of external force. The blades are evenly distributed on the outside of the impeller sleeve. Under the impact of ocean currents in all directions, they can drive the impeller assembly to rotate around the central axis of the steel pipe pile, so that it rises under the action of thread friction. The opening and closing control switch of this invention has a built-in independent motor and remote control system. Each independent motor corresponds to one blade, and its output shaft is connected to the rotation shaft of the corresponding blade. Onshore personnel can operate the opening and closing control switch through the remote control system to keep the device in a retracted state during non-ice periods, so as to minimize the wave-exposed area of ​​the device and extend the service life of the device.

[0015] The length of the connecting section determines the installation position of the impeller assembly. It is set according to the ocean current conditions in the sea area where the project is located. The material and structure of the connecting section should minimize its own weight while ensuring strength.

[0016] The upper and lower icebreaking rods are not fixed in form, such as steel pipes or structural steel. Steel plates can also be added to the outside of the icebreaking rods to expand the effective area. The specific size and quantity can be adjusted according to the ice conditions in the sea area where the project is located. The material strength should be able to withstand the design value of the sea ice load in the sea area.

[0017] The movable collar is cylindrical, with its inner diameter slightly larger than the outer diameter of the steel pipe pile.

[0018] The movable collar engages with the upper end of the connecting section, and the lower end of the connecting section engages with the impeller sleeve, so that when the impeller assembly rotates, the anti-icing component rotates accordingly. This design facilitates the removal of ice slag accumulated in the anti-icing component as it moves. To accommodate this movement, the upper and lower ice-breaking rods are connected by a ball joint, and the included angle can change as the ball joint rotates. The upper end of the upper ice-breaking rod is rotatably connected to the steel pipe pile via the ball joint, and the lower end of the lower ice-breaking rod is rotatably connected to the outside of the movable collar via the ball joint.

[0019] The aforementioned anti-icing device for offshore wind power foundations that can be adjusted with ocean currents includes upper and lower ice-breaking rods that correspond one-to-one and are uniformly wrapped around the outside of the steel pipe pile to form a positive cone and an inverted cone of the same size, respectively; the movable collar can slide freely in the vertical direction; and the springs are arranged at equal intervals.

[0020] The aforementioned anti-icing device for offshore wind power foundations that can be adjusted with ocean currents includes a blade that, driven by ocean currents, can drive the entire impeller assembly to rotate around the central axis of the steel pipe pile. The opening and closing control switch controls the opening and closing of the blades through a control motor.

[0021] The aforementioned anti-icing device for offshore wind power foundations that can adjust with ocean currents also includes a remote control system. The remote control system can remotely control the opening and closing of the control switch. When the sea area is not in the ice-free period, the blades can be retracted to reduce the wave load on the anti-icing device and extend the service life of the device.

[0022] The aforementioned anti-icing device for offshore wind power foundations that can be adjusted with ocean currents requires that the height of the anti-icing component be able to cover at least one day's tidal changes, and that the cone angle be within the range of 50 to 65° when facing ice.

[0023] The aforementioned anti-icing device for offshore wind power foundations that can be adjusted with ocean currents has an upper ice-breaking rod whose upper end is movably connected to a steel pipe pile via a first support and a hinge, and a lower ice-breaking rod whose lower end is movably connected to a movable collar via a second support and a hinge. The upper and lower ends of the spring are on the same horizontal plane as the first and second supports, respectively.

[0024] The aforementioned anti-icing device for offshore wind power foundations that can be adjusted with ocean currents features a connecting section that rises under the push of the impeller sleeve when the impeller assembly rises; and a connecting section that pushes the impeller assembly back to its original position under the action of a spring when the ocean current weakens.

[0025] The anti-icing method of the offshore wind power foundation anti-icing device that can be adjusted with the ocean current as described above, wherein the impeller assembly can rotate and rise and fall around the steel pipe pile under the impact of the ocean current in all directions, driving the angle between the upper and lower ice-breaking rods to change with the ocean current, thereby playing the role of breaking sea ice and reducing the probability of structural ice-induced vibration; when the ocean current weakens, the spring rebounds and presses down the movable collar to make the anti-icing device gradually return to its position.

[0026] The aforementioned anti-icing method of an offshore wind power foundation anti-icing device that can be adjusted with ocean currents involves opening the opening and closing control switch when the ocean current intensifies. The blades open, and the impeller assembly rotates and rises and falls around the steel pipe pile under the impact of the ocean currents in all directions. This causes the angle between the upper and lower ice-breaking rods to change, adjusting with the ocean current to break up sea ice and reduce the probability of ice-induced vibration of the structure. When the ocean current weakens, the spring rebounds and presses down on the movable collar to gradually return the anti-icing device to its original position. The opening and closing control switch is then closed, the blades close, and the anti-icing device enters a dormant state, minimizing the wave-exposed area of ​​the device.

[0027] This invention includes at least one of the following beneficial technical effects:

[0028] 1. As an anti-icing device for offshore wind power foundations that can be adjusted with ocean currents, it can convert the squeezing damage of sea ice on the foundation into bending damage, effectively reduce the sea ice effect on the foundation structure, reduce the possibility of ice-induced vibration, and ensure the normal operation of offshore wind farms.

[0029] The traditional ice-breaking cone is decomposed into a hinged combination of several ice-breaking rods, which reduces the structural weight and the volume of each component, making it easier to install and transport, and saving production and installation costs.

[0030] 2. The icebreaking rod automatically adjusts its working state, such as the angle and height of the ice-breaking rod, according to the ocean current conditions. It is driven by the thrust of the ocean current without the need for external energy support or additional human control. When the ocean current weakens, the spring rebounds and automatically returns to its original position, reducing the wave load on itself.

[0031] 3. By opening and closing the control switch, the cone can be contracted during non-ice periods to reduce wave impact, improve structural durability, and significantly extend the service life of the anti-icing device.

[0032] 4. The springs in the anti-icing rods also have a shock absorption function, which can further reduce the probability of structural ice-induced vibration and improve safety during operation. Attached Figure Description

[0033] Figure 1 This is a front view of the overall structure of an anti-icing device for offshore wind power foundations that can be adjusted with ocean currents in the ice-facing state according to the present invention.

[0034] Figure 2 This is a front view of the overall structure of an anti-icing device for offshore wind power foundations that can be adjusted with ocean currents in the non-icing state according to the present invention.

[0035] Figure 3 This is a partial structural diagram of the anti-icing component of the present invention;

[0036] Figure 4 This is a schematic diagram of the impeller assembly in its deployed state according to the present invention;

[0037] Figure 5 This is a schematic diagram of the impeller assembly in the closed state according to the present invention;

[0038] Figure 6 This is a schematic diagram of the connecting segment structure of the present invention;

[0039] Figure 7 This is a schematic diagram of the structure of the icebreaker rod of the present invention with an external steel plate attached;

[0040] Figure 8 This is a schematic cross-sectional view of the ice-breaking rod of the present invention when it is a steel pipe;

[0041] Figure 9 This is a schematic cross-sectional view of the ice-breaking rod of the present invention when it is made of steel.

[0042] In the diagram, 1. Steel pipe pile; 11. Ice-breaking rod; 12. Movable collar; 13. Spring; 111. Upper ice-breaking rod; 112. Lower ice-breaking rod; 113. Hinge; 114. First support; 115. Second support; 2. External thread; 1101. Steel pipe; 1102. Section steel; 1103. Steel plate; 21. Impeller sleeve; 22. Blade; 23. Opening and closing control switch; 24. Internal thread; 3. Connecting section. Detailed Implementation

[0043] The present invention will be further described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. The structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of the present invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by the present invention, should still fall within the scope of the technical content disclosed in the present invention. For ease of description, the words "upper," "lower," "left," and "right" appearing below only indicate that they are consistent with the upper, lower, left, and right directions of the accompanying drawings themselves, and do not limit the structure.

[0044] refer to Figure 1 , Figure 2 and Figure 3 This invention relates to an anti-icing device for offshore wind power foundations that can be adjusted with ocean currents, including anti-icing components, impeller assembly, and connecting section.

[0045] The anti-icing component includes several ice-breaking rods 11, several springs 13, and a movable collar 12. Each ice-breaking rod 11 includes an upper ice-breaking rod 111, a lower ice-breaking rod 112, a hinge 113, a first support 114, and a second support 115. The upper ice-breaking rod 111 and the lower ice-breaking rod 112 are connected by the hinge 113. The upper end of the upper ice-breaking rod is rotatably connected to the steel pipe pile 1 through the first support 114 and the hinge. The lower end of the lower ice-breaking rod is rotatably connected to the outside of the movable collar 12 through the second support 115 and the hinge. The movable collar 12 is fitted onto the outside of the steel pipe pile. The upper and lower ends of the springs 13 are fixed to the outside of the steel pipe pile and the movable collar, respectively, and are on the same horizontal plane as the first support 114 and the second support 115.

[0046] The impeller assembly is fitted over the steel pipe pile and includes several blades 22 and an impeller sleeve 21. The blades are evenly connected to the outside of the impeller sleeve. The inner wall of the impeller sleeve is provided with internal threads 24, and the steel pipe pile is provided with external threads 2. The impeller sleeve is threadedly connected to the steel pipe pile.

[0047] In order to close the blades when there is no ice to reduce the area exposed to waves, the impeller assembly also includes a motor and an opening and closing control switch 23; the blades are uniformly and rotatably connected to the outer wall of the impeller sleeve via a rotating shaft, the opening and closing control switch is connected to the motor, and the output shaft of the motor is connected to the blade rotating shaft.

[0048] The anti-icing device also includes a connecting section 3, which is disposed between the impeller sleeve 21 and the movable collar 12.

[0049] Specifically, the upper ice-breaking rod 111 and the lower ice-breaking rod 112 correspond one-to-one, and multiple pairs of ice-breaking rods 11 are equidistantly wrapped around the outside of the steel pipe pile to form a positive cone and an inverted cone of the same size; the movable collar 12 can slide freely in the vertical direction; the hinge 113 can rotate freely within a certain angle, so that the ice-facing angle of the anti-icing component changes with the position of the movable collar within a certain range.

[0050] refer to Figure 4 When the opening and closing control switch 23 of the present invention controls the blade to unfold, the blade 22 can drive the entire impeller assembly to rotate around the central axis of the steel pipe pile 1 under the push of the ocean current. Under the action of the internal thread 24 of the impeller sleeve and the external thread 2 of the steel pipe pile, the entire impeller assembly rises along the steel pipe pile.

[0051] Furthermore, the impeller sleeve 21 pushes the connecting section 3 upward along the steel pipe pile.

[0052] Furthermore, the connecting section 3 pushes the movable collar 12 upward along the steel pipe pile.

[0053] Furthermore, when the movable collar 12 rises, it causes the lower ice-breaking rod 112 to rotate, which in turn drives the upper ice-breaking rod 111 to rotate. Several pairs of ice-breaking rods undergo the above process simultaneously, forming a positive cone and an inverted cone with the same size and their bottom surfaces touching. At the same time, under the pressure of the movable collar, the spring 13 is compressed and bent.

[0054] Furthermore, when the ocean current speed decreases or there is no ocean current activity, under the action of the spring rebound force and the device's own weight, the movable collar descends, the angle between the upper and lower ice-breaking rods decreases, the connecting section descends under the thrust of the movable collar, the impeller assembly rotates and descends, the device slowly returns to its initial state, the area of ​​the foundation at the waterline decreases, and the device can avoid being subjected to additional wave impacts.

[0055] refer to Figure 5 The opening and closing control switch in this invention has a built-in independent motor and remote control system. Each independent motor corresponds to one blade, and its output shaft is connected to the rotation shaft of the corresponding blade. Onshore personnel can operate the opening and closing control switch through the remote control system to control the blade to close when there is no ice in the sea area where the project is located, so that the device enters a dormant state and minimizes the wave-exposed area of ​​the device.

[0056] refer to Figure 6 The connecting section structure in this invention can refer to the cage form of a single pile foundation. Its structure can be adjusted according to the actual construction of the project. Its materials and structure should ensure strength while minimizing its own weight.

[0057] Preferably, the number of ice-breaking rods is not less than four, and the total surface area of ​​the ice-resistant component cone should meet the basic requirements for the size of the ice-resistant cone.

[0058] Preferably, the number of springs is not less than four, and the length of the springs in their natural state is approximately the sum of the lengths of the upper and lower ice-breaking rods.

[0059] Preferably, the angle between the upper and lower ice-breaking rods of the anti-ice component in the ice-facing state is 50-65°, and the height of the anti-ice component should be able to cover at least the changes in seawater tides throughout the day.

[0060] Preferably, the number of blades is no less than four, and all of them can rotate under the impact of ocean currents in all directions.

[0061] refer to Figure 7 and Figure 8 The ice-breaking rod 11 has no fixed form, such as steel pipe 1101, steel section 1102, etc., and steel plate 1103 can also be added to the outside of the ice-breaking rod to expand the working area. The specific size and quantity can be arranged according to the ice conditions of the sea area where the project is located.

[0062] The above embodiments are merely illustrative of the principles and operation of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. An anti-icing device for offshore wind turbine foundations that can adjust with ocean currents, characterized in that, include: An anti-icing component, surrounding the outside of the steel pipe pile (1) for ice breaking, includes several ice-breaking rods (11), several springs (13), and a movable collar (12). The ice-breaking rods include an upper ice-breaking rod (111) and a lower ice-breaking rod (112), which are rotatably connected. The upper end of the upper ice-breaking rod is movably connected to the steel pipe pile, and the lower end of the lower ice-breaking rod is movably connected to the movable collar. The movable collar is movably sleeved on the steel pipe pile. The upper and lower ends of the springs are respectively connected to the steel pipe pile and the movable collar for ice resistance. The impeller assembly is rotatably connected to the outside of the steel pipe pile, including several blades (22) and an impeller sleeve (21). The blades are evenly distributed and connected to the outer wall of the impeller sleeve. The inner wall of the impeller sleeve is provided with an internal thread (24), and the steel pipe pile is provided with an external thread (2) at a corresponding position. The steel pipe pile (1) is threadedly connected to the impeller sleeve to push the anti-icing component to move up and down to adjust the anti-icing angle and the ice-facing height.

2. The anti-icing device for offshore wind power foundations that can be adjusted with ocean currents according to claim 1, characterized in that, It also includes a connecting section (3), which is movably sleeved on the outside of the steel pipe pile (1) and located between the impeller assembly and the movable collar.

3. The anti-icing device for offshore wind power foundations that can be adjusted with ocean currents according to claim 1, characterized in that, The impeller assembly also includes a motor and an opening / closing control switch (23); the blades are evenly connected to the outer wall of the impeller sleeve through a rotating shaft, the opening / closing control switch is connected to the motor, and the output shaft of the motor is connected to the blade rotating shaft.

4. The anti-icing device for offshore wind power foundations that can be adjusted with ocean currents according to claim 1, characterized in that, The upper ice-breaking rod (111) and the lower ice-breaking rod (112) correspond one to one and are evenly wrapped around the outside of the steel pipe pile (1) to form a positive cone and an inverted cone of the same size; the movable collar (12) can slide freely in the vertical direction; the springs (13) are arranged at equal intervals.

5. The anti-icing device for offshore wind power foundations that can be adjusted with ocean currents according to claim 3, characterized in that, The blade (22) can drive the entire impeller assembly to rotate around the central axis of the steel pipe pile (1) under the push of the ocean current. The opening and closing control switch (23) controls the opening and closing of the blade through the control motor.

6. The anti-icing device for offshore wind power foundations that can be adjusted with ocean currents according to claim 3, characterized in that, It also includes a remote control system, which can remotely control the opening and closing of the control switch (23). When the sea area is not in the ice-free period, the blades can be retracted to reduce the wave load on the anti-icing device and extend the service life of the device.

7. An anti-icing device for offshore wind power foundations that can be adjusted with ocean currents according to claim 1, characterized in that, The height of the anti-ice component is sufficient to cover the tidal changes of the sea within a day, and the cone angle is within the range of 50 to 65° when facing ice.

8. The anti-icing device for offshore wind power foundations that can be adjusted with ocean currents according to claim 1, characterized in that, The upper end of the upper ice-breaking rod is movably connected to the steel pipe pile through the first support (114) and the hinge, and the lower end of the lower ice-breaking rod is movably connected to the movable collar through the second support (115) and the hinge. The upper and lower ends of the spring (13) are on the same horizontal plane as the first support (114) and the second support (115), respectively.

9. An anti-icing method for an offshore wind power foundation anti-icing device adjustable with ocean currents according to any one of claims 1 to 8, characterized in that, The impeller assembly can rotate and rise and fall around the steel pipe pile under the impact of ocean currents in all directions, causing the angle between the upper and lower ice-breaking rods to change and adjust with the ocean current, which plays a role in breaking sea ice and reducing the probability of ice-induced vibration of the structure. When the effect of the ocean current weakens, the spring rebounds and presses down the movable collar to gradually return the anti-icing component to its original position.

10. The anti-icing method for an offshore wind power foundation anti-icing device adjustable with ocean currents according to claim 3, characterized in that, When the ocean current intensifies, the opening and closing control switch is turned on, the blades open, and the impeller assembly rotates around the steel pipe pile under the impact of the ocean currents in all directions, causing the angle between the upper and lower ice-breaking rods to change. This adjusts with the ocean current, thus breaking up sea ice and reducing the probability of ice-induced vibration of the structure. When the ocean current weakens, the spring rebounds and presses down on the movable collar to gradually return the anti-icing components to their original position. The opening and closing control switch is then turned off, the blades close, and the anti-icing device enters a dormant state, minimizing the wave-exposed area of ​​the device.

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