Anti-scouring device, fan foundation and wind generating set

Abstract

The invention relates to an anti-scour device, a fan foundation and a wind generating set, the anti-scour device is used for a pile foundation, the anti-scour device comprises a blocking body, the blocking body comprises a blocking barrel and end covers, the blocking barrel is provided with an inner cavity, the end covers for sealing the inner cavity are arranged at the two axial ends of the blocking barrel correspondingly, and through holes communicating with the inner cavity are oppositely formed in the end covers; the shape of the through hole is matched with that of the pile foundation, the through hole is used for sleeving the pile foundation, a first opening and a second opening which are communicated with the inner cavity are formed in the blocking cylinder, and a fluid flowing path is formed between the first opening and the second opening; the blocking plate is arranged in the inner cavity and connected with the blocking body, and the blocking plate is located on the fluid flowing path so as to provide flowing resistance for the fluid. The embodiment of the invention provides an anti-scour device, a fan foundation and a wind generating set, and the anti-scour device can slow down trailing vortex scour of a pile foundation and ensure the reliability of the fan foundation.

Description

Technical Field

[0001] The present application relates to the field of wind power technology, and in particular to an anti-scour device, a wind turbine foundation and a wind turbine generator set. Background Art

[0002] Under the influence of ocean currents and waves, offshore wind turbine foundations will induce strong water currents or high-speed rotating vortices in the local sea area around the pile foundation. These water currents or vortices have a high scouring (carrying sediment) capacity, thus forming scour pits in the local area, weakening the bearing capacity of the pile foundation and endangering the safety of the pile foundation and the upper wind turbine.

[0003] Offshore wind turbines are generally located in shallow waters close to the shore, where ocean currents and waves often act simultaneously. Due to the interaction between the wave boundary layer and the ocean current boundary layer, alternating wake vortices are formed on the pile foundation side, increasing the amount of sediment transport near the pile foundation, causing scouring and affecting the reliability of the wind turbine foundation. Summary of the invention

[0004] The embodiments of the present application provide an anti-scouring device, a wind turbine foundation and a wind turbine generator set. The anti-scouring device can reduce the scouring of the tail vortex on the pile foundation and ensure the reliability of the wind turbine foundation.

[0005] On the one hand, according to an embodiment of the present application, an anti-scour device is proposed for use in a pile foundation, the anti-scour device comprising: a barrier body, comprising a barrier tube and end covers, the barrier tube having an inner cavity and end covers for closing the inner cavity are respectively arranged at both ends of its own axial direction, each end cover is relatively provided with a through hole connected to the inner cavity, the shape of the through hole matches the shape of the pile foundation and is used to sleeve the pile foundation, the barrier tube is provided with a first opening and a second opening connected to the inner cavity, a fluid flow path is formed between the first opening and the second opening; a barrier plate is arranged in the inner cavity and connected to the barrier body, the barrier plate is located on the fluid flow path to provide flow resistance to the fluid entering the inner cavity.

[0006] According to one aspect of the embodiment of the present application, the first opening and the second opening are arranged opposite to each other in the radial direction of the barrier cylinder.

[0007] According to one aspect of an embodiment of the present application, there are multiple blocking plates, which are spaced apart in the circumferential direction of the blocking cylinder, and an angle α is formed between an extension direction of each blocking plate and an arrangement direction of the first opening and the second opening, wherein α is less than 90°.

[0008] According to one aspect of an embodiment of the present application, one end of the baffle plate in the axial direction is connected to one of the end covers and the other end is connected to the other end cover. In the radial direction of the baffle tube, one end of the baffle plate facing the baffle tube is spaced apart from the baffle tube and forms a first flow gap. One end of the baffle plate facing away from the baffle tube is aligned with the wall surface of the through hole formed by the end cover.

[0009] According to one aspect of an embodiment of the present application, the anti-scouring device also includes a baffle, which is arranged on at least one end cover, and includes a frame and a blocking portion. The frame is inserted into the end cover and has a channel connected to the inner cavity, and the channel is used to guide the fluid into the inner cavity. The blocking portion is arranged in the channel to provide flow resistance to the fluid entering the channel.

[0010] According to one aspect of the embodiment of the present application, the frame includes a first wall and a second wall that are arranged opposite to each other, and along the axial direction, a plurality of blocking portions are alternately arranged on the first wall and the second wall.

[0011] According to one aspect of an embodiment of the present application, the blocking portion includes a partition block and a guide plate, which are spaced apart in the axial direction and form a second flow gap, and the second flow gap of the blocking portion located on one of the first wall and the second wall extends in the direction of the other wall.

[0012] According to one aspect of an embodiment of the present application, the dividing block is in the shape of a polygonal block, the guide plate is in the shape of an arc-shaped plate, one end of the guide plate is connected to one of the first wall and the second wall and the other end is cantilevered; wherein, in the same blocking portion, one of the top angles of the dividing block is axially arranged in a direction away from the guide plate, and the guide plate is recessed in an axial direction away from the dividing block.

[0013] According to one aspect of the embodiment of the present application, the guide plate is arranged perpendicular to the first wall and the second wall in the tangent direction of one end of the cantilever.

[0014] According to one aspect of the embodiment of the present application, the baffle extends into the inner cavity, and the axial end of the baffle is located inside the end cover or is arranged flush with the end cover.

[0015] According to one aspect of the embodiment of the present application, a plurality of reversing grooves are provided on the barrier tube, and the plurality of reversing grooves are spaced apart in the circumferential direction of the barrier tube, and each reversing groove is formed by an outer wall of the barrier tube facing away from the inner cavity and recessed toward the inner cavity.

[0016] According to one aspect of an embodiment of the present application, the axial projection of the wall surface enclosing the commutation slot includes a straight line segment and an arc segment connected to the straight line segment, and the ends of the straight line segment and the arc segment of each commutation slot that face away from each other are both located on the same circular trajectory.

[0017] According to one aspect of the embodiments of the present application, an angle β between a tangent direction of a straight line segment of each commutation slot on a circular trajectory and an extension direction of the straight line segment satisfies 0<β≤90°.

[0018] According to one aspect of the embodiment of the present application, an overflow port is further provided on the barrier tube. Along the circumference of the barrier tube, the overflow port is located between the first opening and the second opening and is connected to the inner cavity.

[0019] According to one aspect of the embodiment of the present application, there are multiple overflow ports, at least some of which are distributed at intervals along the axial direction and at least some of which are distributed at intervals along the circumferential direction.

[0020] In another aspect, according to an embodiment of the present application, a wind turbine foundation is provided, comprising:

[0021] The anti-scour device described above;

[0022] The pile foundation has a shape matching that of the through hole, and the barrier body is sleeved on the pile foundation through the through holes of each end cover.

[0023] In yet another aspect, according to an embodiment of the present application, a wind turbine generator set is provided, comprising the above-mentioned wind turbine foundation.

[0024] According to the anti-scour device, wind turbine foundation and wind turbine generator set provided in the embodiments of the present application, the anti-scour device includes a barrier body and a barrier plate. The end cover of the barrier body can be sleeved on the pile foundation through its through hole to achieve cooperation with the pile foundation and form an annular cavity between the pile foundation and the barrier body. Since the first opening and the second opening are respectively connected to the inner cavity of the barrier cylinder and form a fluid flow path between each other, when the anti-scour device cooperates with the pile foundation to form an annular chamber, fluid such as seawater can enter the inner cavity through one of the first opening and the second opening and flow along the fluid flow path to the other of the first opening and the second opening. By arranging the barrier plate on the fluid flow path, resistance can be provided to the flow of the fluid to weaken the effect of the fluid flow velocity of the fluid entering the inner cavity in the mainstream direction, so that the flow velocity of the fluid when flowing out from one of the first opening and the second opening is much smaller than the water flow when entering from the other of the first opening and the second opening, which can slow down the scouring of the tail vortex of the pile foundation and ensure the reliability of the wind turbine foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0026] Figure 1 is a structural schematic diagram of a wind turbine generator set according to an embodiment of the present application;

[0027] Figure 2 It is a schematic diagram of the flow field corresponding to the pile foundation in seawater;

[0028] Figure 3 is a structural schematic diagram of a fan foundation according to an embodiment of the present application;

[0029] Figure 4 is a schematic structural diagram of an anti-scour device according to an embodiment of the present application;

[0030] Figure 5 is a front view of an anti-scour device in accordance with an embodiment of the present application in cooperation with a pile foundation;

[0031] Figure 6 yes Figure 5 The cross-sectional view along the AA direction;

[0032] Figure 7 is a schematic diagram of a flow field corresponding to an anti-scour device according to an embodiment of the present application;

[0033] Figure 8 is a schematic structural diagram of an anti-scour device according to another embodiment of the present application;

[0034] Fig. 9 is a top view of the anti-scour device and the pile foundation in another embodiment of the present application;

[0035] Fig.10 yes Fig. 9 The cross-sectional view along the BB direction;

[0036] Fig.11 is a schematic structural diagram of a baffle according to an embodiment of the present application;

[0037] Fig.12 yes Fig. 9 Cross-sectional view along CC direction;

[0038] Fig.13 is a side view of an anti-scour device according to another embodiment of the present application;

[0039] Fig.14 It is a schematic diagram of the flow field corresponding to the anti-scour device of another embodiment of the present application.

[0040] in:

[0041] 1- Fan foundation;

[0042] 100-anti-scour device;

[0043] 10-blocking body; 11-blocking cylinder; 111-inner cavity; 112-first opening; 113-second opening; 114-reversing groove; 114a-straight line segment; 114b-arc segment; 115-overflow port; 12-end cover; 121-through hole; 13-fluid flow path;

[0044] 20-Blocking plate;

[0045] 30- first current gap;

[0046] 40- baffle; 41- frame; 411- channel; 412- first wall; 413- second wall; 42- blocking portion; 421- partition block; 422- guide plate; 423- second flow gap;

[0047] 200-pile foundation;

[0048] 2-tower; 3-nacelle; 4-impeller; 401-hub; 402-blade;

[0049] aa-tail vortex; bb-scour pit; cc-horseshoe vortex; dd-circular trajectory;

[0050] X-axial direction; Y-circumferential direction; Z-radial direction.

[0051] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0052] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0053] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the anti-scour device, wind turbine foundation and wind turbine generator set of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0054] like Figure 1As shown, an embodiment of the present application provides a wind turbine generator set, including a wind turbine foundation 1 and a wind turbine body, and the wind turbine body includes a tower 2, a nacelle 3, a generator and an impeller 4. The tower 2 is connected to the wind turbine foundation 1, the nacelle 3 is arranged at the top of the tower 2, and the generator is arranged in the nacelle 3. In some examples, the generator can be located outside the nacelle 3. Of course, in some examples, the generator can also be located inside the nacelle 3. The impeller 4 includes a hub 401 and a plurality of blades 402 connected to the hub 401. The impeller 4 is connected to the rotor of the generator through the hub 401, thereby driving the rotor to rotate relative to the stator to achieve the power generation demand of the wind turbine generator set.

[0055] like Figure 2 As shown, the offshore wind turbine foundation, under the action of ocean currents and waves, will induce strong water currents or high-speed rotating vortices in the local sea area around the piles. These water currents or vortices have a high scouring (carrying sediment) ability, thereby forming scour pits bb in the local area, weakening the bearing capacity of the pile foundation 200, and endangering the safety of the pile foundation 200 and the upper wind turbine body.

[0056] Offshore wind turbines are generally located in shallow waters close to the shore, where currents and waves often act simultaneously. Due to the interaction between the wave boundary layer and the current boundary layer, alternating wake vortices aa are formed on the side of the pile foundation 200, and the streamlines on the pile side are tightened, which increases the amount of sediment transport near the pile foundation 200, causing scouring and affecting the reliability of the wind turbine foundation 1.

[0057] Therefore, the scouring of offshore wind power foundations has long been a problem that has plagued the operation of offshore wind power. The common protection schemes of riprap and sandbags are washed away or destroyed in 1 to 2 years under the long-term scouring of ocean currents and waves. When the pile foundation 200 is inserted into the mud surface of the seabed, the scouring will be very intense, and a large scouring pit bb will be formed in a short time. Conventional protection measures such as riprap and sandbags require construction period preparation and are often not installed quickly. For the scouring problem, many research institutes, universities, offshore wind power operation and maintenance companies, and development companies have issued different solutions. Some are reinforcement riprap solutions, and some are solutions to cover the scour area to prevent the surface of the silt from being scoured. There are many ways, but there is still a big gap with actual application. Some steel structure anti-scouring solutions need to be installed underwater, the process is complicated, and it is not easy to implement.

[0058] Based on this, an embodiment of the present application provides a new wind turbine foundation 1, which can be used for the wind turbine generator set provided in the above embodiment. The wind turbine foundation 1 can improve its own anti-scour capability and have high reliability by installing an anti-scour device on the pile foundation 200. At the same time, the wind turbine foundation 1 is easy to install, and the process is simple and easy to implement.

[0059] like Figure 3As shown, a wind turbine foundation 1 provided by an embodiment of the present application includes a pile foundation 200 and an anti-scouring device 100. The anti-scouring device 100 is sleeved on the pile foundation 200. The wind turbine foundation 1 is connected to the tower 2 of the wind turbine body through the pile foundation 200 to support the wind turbine body.

[0060] The anti-scour device 100 provided in the embodiment of the present application can be produced and sold as an independent product, and can also be used in the wind turbine foundation 1 provided in the above embodiments and serve as a component of the wind turbine foundation. The anti-scour device 100 aims to reduce the surface current speed of the foundation by manufacturing a special-shaped structure that generates a counter-scouring water flow, thereby greatly reducing the amount of seabed scouring, forming a shallower scouring pit and achieving scouring balance. A once-and-for-all non-powered way to solve problems such as silt scouring at the mud surface of the seabed. Specifically, it aims to solve at least one of the following technical problems:

[0061] 1. Slow down the surface current speed of the pile foundation 200, thereby reducing the amount of silt erosion and deposition.

[0062] 2. Improve the overall rigidity of the wind turbine foundation 1 and mitigate the vibration and damage of the blades 401 and tower 2 of the wind turbine generator set caused by the impact of sea waves.

[0063] 3. Improve the stability and reliability of offshore wind farms.

[0064] 4. There is no need to actively carry out flushing maintenance, such as riprap and sandbag filling during operation and maintenance, which saves project costs.

[0065] In order to better understand the anti-scouring device 100 provided in one embodiment of the present application, the following will be combined with the attached Figures 4 to 14 The anti-scour device 100 will be described in detail.

[0066] like Figures 4 to 7 As shown, an anti-scour device 100 provided by one embodiment of the present application is used for a pile foundation 200. The anti-scour device 100 includes a barrier body 10 and a barrier plate 20. The barrier body 10 includes a barrier tube 11 and an end cover 12. The barrier tube 11 has an inner cavity 111 and is respectively provided with end covers 12 for closing the inner cavity 111 at both ends of its own axial direction X. Through holes 121 communicating with the inner cavity 111 are relatively provided on each end cover 12. The shape of the through hole 121 matches the shape of the pile foundation 200 and is used to sleeve the pile foundation 200. The barrier tube 11 is provided with a first opening 112 and a second opening 113 communicating with the inner cavity 111. A fluid flow path 13 is formed between the first opening 112 and the second opening 113. The barrier plate 20 is provided in the inner cavity 111 and connected to the barrier body 10. The barrier plate 20 is located on the fluid flow path 13 to provide flow resistance to the fluid entering the inner cavity.

[0067] The orthographic projection shape of the barrier tube 11 on its own axial direction X can be a circular ring, an elliptical ring or a polygonal ring, and when it is a polygon, it can be a regular polygon. Exemplarily, the orthographic projection shape of the barrier tube 11 on its own axial direction X is a circle.

[0068] The orthographic projection shape of the outer circumference of the end cover 12 in the axial direction X of the barrier cylinder 11 can match the orthographic projection shape of the barrier cylinder 11 , and can be circular, elliptical or polygonal.

[0069] The barrier tube 11 and the end cover 12 may be connected in a fixed manner, such as welding or an integrated structure. Of course, they may also be connected in a detachable manner, such as by fasteners such as bolts.

[0070] The shape of the through hole 121 provided on the end cover 12 may match the shape of the pile foundation 200 , for example, may be circular, polygonal, etc., and may be specifically determined according to the shape of the pile foundation 200 used.

[0071] The shapes of the first opening 112 and the second opening 113 may be the same or different, and the sizes of the first opening 112 and the second opening 113 may be the same or different.

[0072] The fluid may be a water flow. When the wind turbine foundation 1 is located in the sea, the fluid may be referred to as seawater. For ease of explanation, the following will take the fluid as seawater as an example.

[0073] After the anti-scour device 100 is sleeved on the pile foundation 200, the pile foundation 200 can block the barrier body 10 on the radial direction Z of the barrier tube 11 toward the side of the pile foundation 200. After the fluid enters the inner cavity 111 of the barrier tube 11 through one of the first opening 112 and the second opening 113, it flows in the annular cavity enclosed by the barrier body 10 and the pile foundation 200, and flows out from the other of the first opening 112 and the second opening 113. The path that the fluid travels in the process of flowing from one of the first opening 112 and the second opening 113 to the other of the first opening 112 and the second opening 113 can be understood as a fluid flow path.

[0074] For example, when the pile foundation 200 and the barrier tube 11 are both circular, taking the example of the fluid flowing from the first opening 112 to the second opening 113, the fluid can flow from the first opening 112 on both sides of the barrier tube 11 in the circumferential direction Y to the second opening 113, and the arcuate flow path from the left side of the first opening 112 to the second opening 113 and the arcuate flow path from the right side of the first opening 112 to the second opening 113 can be understood as the fluid flow path 13 proposed in the embodiment of the present application. Of course, when the barrier tube 11 and the pile foundation 200 are both polygonal, the zigzag flow path from the left side of the first opening 112 to the second opening 113 and the zigzag flow path from the right side of the first opening 112 to the second opening 113 can be understood as the fluid flow path 13 proposed in the embodiment of the present application.

[0075] The baffle plate 20 is located on the fluid flow path 13, which means that when the baffle plate 20 is not set in this area, the fluid can pass through it. When the baffle plate 20 is set, the fluid will be blocked by the baffle plate 20 during fluid circulation, reducing its flow rate and changing its direction.

[0076] The anti-scour device 100 provided in one embodiment of the present application, the end cover 12 of the barrier body 10 can be sleeved on the pile foundation 200 through the through hole 121 thereof, so as to cooperate with the pile foundation 200 and form an annular cavity between the pile foundation 200 and the barrier body 10. Since the first opening 112 and the second opening 113 are respectively connected to the inner cavity 111 of the barrier cylinder 11 and form a fluid flow path 13 between each other, when the anti-scour device 100 cooperates with the pile foundation 200 to form an annular chamber, a fluid such as seawater can enter the inner cavity 111 through one of the first opening 112 and the second opening 113 and flow along the fluid flow path 13 to the first opening. 112 and the other of the second openings 113, by setting the baffle plate 20 on the flow path, it is possible to provide resistance to the flow of the fluid, so as to weaken the effect of the fluid velocity in the mainstream direction of the fluid entering the inner cavity, so that the flow velocity of the fluid when it flows out of one of the first openings 112 and the second openings 113 is much smaller than the water flow when it enters from the other of the first openings 112 and the second openings 113, which can slow down the scouring of the tail vortex aa of the pile foundation 200, thereby reducing the amount of silt scouring and silting, ensuring the reliability and stability of the wind turbine foundation 1, and there is no need to actively carry out scouring maintenance, such as riprap and sandbag filling during operation and maintenance, saving engineering costs. At the same time, the setting of the anti-scouring device 100 can also improve the overall rigidity of the wind turbine foundation 1, and slow down the vibration and damage of the blades 401 and the tower 2 of the wind turbine generator set caused by the impact of waves.

[0077] In some optional embodiments, in an anti-scouring device 100 provided in one embodiment of the present application, the first opening 112 and the second opening 113 are arranged opposite to each other in the radial direction Z of the barrier cylinder 11 .

[0078] It can be understood that the center line of the first opening 112 and the second opening 113 passes through the axis of the barrier tube 11 and are perpendicular to each other.

[0079] Since the sea current and wave current in the area where the wind turbine generator set is located in the seawater have a main direction, the first opening 112 and the second opening 113 are arranged relatively in the radial direction Z of the barrier cylinder 11. The arrangement direction of the first opening 112 and the second opening 113 can be arranged parallel to the main direction regardless of high tide or low tide, ensuring that the flow velocity and flow direction of the fluid can be adjusted by the barrier plate 20 during the process of the fluid entering the inner cavity 111 through one of the first opening 112 and the second opening 113 and flowing out through the first opening 112 and the second opening 113, thereby reducing the scouring of the mud and sand around the pile foundation 200 by the tail vortex aa, and ensuring the reliability of the wind turbine foundation 1.

[0080] In some optional embodiments, an anti-scour device 100 provided by an embodiment of the present application has a plurality of baffle plates 20, and the plurality of baffle plates 20 are spaced apart in the circumferential direction Y of the baffle cylinder 11, and an angle α is formed between an extension direction of each baffle plate 20 and an arrangement direction of the first opening 112 and the second opening 113, wherein α is less than 90°.

[0081] The number of the baffle plates 20 may be two, three or more, and each baffle plate 20 may be connected to the inner wall of the baffle tube 11 , or may be connected to the two end covers 12 , as long as the position of the baffle plates 20 can be fixed.

[0082] The arrangement direction of the first openings 112 and the second openings 113 can be understood as the direction of the line connecting the centers of the first openings 112 and the second openings 113 .

[0083] The angle α can be any value between 0° and 90°, can be any value between 30° and 60°, and can be 45°.

[0084] The anti-scour device 100 provided in one embodiment of the present application can make the number of baffles 20 multiple, so that the fluid can be blocked by multiple baffles 20 during the process of entering from one of the first opening 112 and the second opening 113 and flowing out from the other, effectively slowing down its flow rate and reducing the scouring of the mud and sand around the pile foundation 200 by the tail vortex aa. In addition, by making the extension direction of each baffle 20 and the arrangement direction of the first opening 112 and the second opening 113 have an angle α<90°, the contact area between the fluid and the baffle 20 in the flow direction can be increased during the flow of the fluid, increasing the resistance and facilitating the reduction of the flow rate.

[0085] Optionally, two of the plurality of blocking plates 20 may be arranged in pairs and symmetrically distributed on both sides of the first opening 112 in the circumferential direction Y of the blocking cylinder 11. The two blocking plates 20 opposite to the first opening 112 are dispersedly arranged in a direction away from each other toward one side of the first opening 112, and the two blocking plates 20 opposite to the first opening 112 are gathered together in a direction close to each other away from one side of the first opening 112, and the two blocking plates 20 are in an "eight" shape as a whole.

[0086] Optionally, two of the plurality of blocking plates 20 may be arranged in pairs and symmetrically distributed on both sides of the second opening 113 in the circumferential direction Y of the blocking cylinder 11. The two blocking plates 20 opposite to the second opening 113 are dispersedly arranged in a direction away from each other toward one side of the second opening 113, and the two blocking plates 20 opposite to the second opening 113 are gathered together in a direction close to each other away from one side of the second opening 113, and the two blocking plates 20 are in an inverted "eight" shape as a whole.

[0087] Through the above arrangement, when the fluid entering from the first opening 112 and the second opening 113 flows to the other one from the left and right sides in the circumferential direction Y, it can be effectively blocked by the baffle plate 20, slowing down the flow rate and reducing the scouring of the mud and sand around the pile foundation 200 by the tail vortex aa, thereby ensuring the reliability of the fan foundation 1.

[0088] In some optional embodiments, an anti-scour device 100 provided by an embodiment of the present application, one end of the baffle plate 20 in the axial direction X is connected to one of the end covers 12 and the other end is connected to the other end cover 12, and in the radial direction Z of the baffle cylinder 11, one end of the baffle plate 20 facing the baffle cylinder 11 is spaced apart from the baffle cylinder 11 and forms a first flow gap 30, and one end of the baffle plate 20 facing away from the baffle cylinder 11 is aligned with the wall surface of the through hole 121 enclosed by the end cover 12.

[0089] The first flow gap 30 is used to allow the fluid entering from one of the first opening 112 and the second opening 113 to flow toward the other side.

[0090] The blocking plate 20 is disposed on a side facing away from the blocking cylinder 11 in the radial direction Z and does not protrude from the end cover 12 .

[0091] The anti-scour device 100 provided in one embodiment of the present application has the above-mentioned arrangement so that when it is sleeved on the pile foundation 200, the baffle plate 20 can be as close to the pile foundation 200 as possible, so that the fluid entering from the first opening 112 and the second opening 113 can be partially blocked and decelerated by the baffle plate 20, and can also flow to the other of the first opening 112 and the second opening 113 through the first flow gap 30 arranged away from the pile foundation 200 in the radial direction Z, so that it flows as far away from the side where the pile foundation 200 is located, thereby reducing the scouring of the pile foundation 200 and improving its reliability.

[0092] like Figures 8 to 12 As shown, in some optional embodiments, the anti-scouring device 100 provided by an embodiment of the present application further includes a baffle 40, and the baffle 40 is arranged on at least one end cover 12, and the baffle 40 includes a frame 41 and a blocking portion 42. The frame 41 is inserted into the end cover 12 and has a channel 411 connected to the inner cavity 111, and the channel 411 is used to guide the fluid into the inner cavity 111. The blocking portion 42 is arranged in the channel 411 to provide flow resistance to the fluid entering the channel 411.

[0093] The flow blocker 40 may be disposed on one of the end covers 12 , and of course, the flow blocker 40 may also be disposed on both end covers 12 .

[0094] The number of the baffles 40 provided on the end cover 12 may be one, or more than two. When there are more than two, the two or more baffles 40 may be distributed at intervals in the circumferential direction Y of the baffle cylinder 11 .

[0095] like Figure 2 As shown, due to the interaction between the wave boundary layer and the ocean current boundary layer, a downward backflow will also be formed on the front side of the pile body of the pile foundation 200. The changes in these flow fields increase the amount of sediment transport near the pile body. The interaction between the wave boundary layer and the ocean current boundary layer forms a horseshoe vortex cc around the pile foundation 200. The anti-scour device 100 provided by an embodiment of the present application can be used to make the end cover 12 provided with the baffle 40 face upward in the axial direction X, so that the downward backflow can enter the inner cavity 111 through the baffle 40. Since the baffle 40 includes a frame 41 and a blocking portion 42, when the downward backflow can enter the inner cavity 111 through the channel 411 of the frame 41, the blocking portion 42 provided in the channel 411 makes the downward backflow along the axial direction X be blocked multiple times during the process of flowing from the channel 411 to the inner cavity 111, and slows it down, thereby alleviating the influence of the horseshoe vortex cc on the pile foundation 200.

[0096] In some optional embodiments, an anti-scour device 100 provided by an embodiment of the present application, the frame 41 includes a first wall 412 and a second wall 413 arranged opposite to each other, and along the axial direction X, a plurality of blocking portions 42 are alternately arranged on the first wall 412 and the second wall 413 .

[0097] The first wall 412 and the second wall 413 may be distributed along the circumferential direction Y of the barrier tube 11 , and the number of blocking portions 42 provided on the first wall 412 and the second wall 413 may be the same. Of course, the number of blocking portions 42 provided on one may be greater than the number of blocking portions 42 provided on the other.

[0098] An anti-scour device 100 provided in an embodiment of the present application has multiple blocking parts 42 alternately arranged on the first wall 412 and the second wall 413, so that the fluid flowing downward along the axial direction X can pass through multiple barriers when entering the channel 411, thereby ensuring the deceleration requirement for the fluid speed and reducing the influence of the horseshoe vortex cc on the pile foundation 200.

[0099] In some optional embodiments, the blocking portion 42 includes a partition block 421 and a guide plate 422, which are spaced apart in the axial direction X and form a second flow gap 423, and the second flow gap 423 of the blocking portion 42 located on one of the first wall 412 and the second wall 413 extends toward the other direction.

[0100] The partition blocks 421 and the guide plates 422 of the same blocking portion 42 are spaced apart in the axial direction X and form a second flow gap 423, so that the downward fluid can first be diverted through the obstruction of the partition blocks 421 after entering the channel 411, and a part of the fluid is guided to the second flow gap 423. Since the second flow gap 423 of the blocking portion 42 located on one of the first wall 412 and the second wall 413 is extended in the direction of the other, the fluid entering the second flow gap 423 can flow toward the other side of the first wall 412 and the second wall 413, thereby not only slowing down the flow rate, but also allowing the fluid entering the second flow gap 423 to impact the fluid falling from the middle of the channel 411, so as to weaken the speed of the fluid that is not blocked by the blocking portion 42 and falls directly, thereby optimizing the anti-scouring performance of the anti-scouring device 100.

[0101] In some optional embodiments, an anti-scour device 100 provided by an embodiment of the present application, wherein the partition block 421 is in the shape of a polygonal block, the guide plate 422 is in the shape of an arc-shaped plate, one end of the guide plate 422 is connected to the first wall 412 and one of the second wall 413 and the other end is cantilevered, wherein, in the same blocking portion 42, one of the top angles of the partition block 421 is arranged in a direction away from the guide plate 422 along the axial X direction, and the guide plate 422 is recessed in a direction away from the partition block 421 along the axial X direction.

[0102] The partition block 421 may be in the form of a triangular block, a quadrilateral block, a pentagonal block structure, etc., and may be a triangular block structure.

[0103] The guide plate 422 may be in the shape of a circular arc plate or an elliptical arc plate, and the guide plate 422 may be connected to one of the first wall 412 and the second wall 413 by welding or an integrated structure.

[0104] The anti-scour device 100 provided in one embodiment of the present application, through the above-mentioned arrangement, is conducive to the partition block 421 to divert and guide the fluid entering the channel 411, so that the fluid can enter the second flow gap 423. Under the guidance of the guide plate 422 and the partition block 421, it is conducive to weakening the speed of the fluid that is not blocked by the blocking part 42 and falls directly, thereby optimizing the anti-scour performance of the anti-scour device 100.

[0105] like Fig.12 As shown, in some optional embodiments, in an anti-scour device 100 provided by an embodiment of the present application, the guide plate 422 is arranged perpendicular to the first wall 412 and the second wall 413 in the tangent direction m of one end of the cantilever arrangement.

[0106] One end of the guide plate 422 disposed on the cantilever may be a tangent direction of the inner wall surface or the outer wall surface of the guide plate 422 at the end.

[0107] The anti-scour device 100 provided in one embodiment of the present application can, through the above-mentioned arrangement, ensure that the flow direction of the fluid diverted to the second flow gap 423 when flowing out of the second flow gap 423 can be perpendicular or approximately perpendicular to the flow direction of the fluid that is not blocked by the blocking part 42 and falls directly, and can reliably achieve the effect of turbulence and deceleration, thereby effectively ensuring the anti-scour effect of the anti-scour device 100.

[0108] In some optional embodiments, in an anti-scour device 100 provided by an embodiment of the present application, the baffle 40 extends into the inner cavity 111 , and the end of the baffle 40 in the axial direction X is located inside the end cover 12 or is arranged flush with the end cover 12 .

[0109] A through hole matching the shape of the baffle 40 may be provided on the end cover 12 , and the baffle 40 may extend into the inner cavity 111 through the corresponding through hole, and the end portion in the axial direction X is connected to the end cover 12 .

[0110] Through the above arrangement, the baffle 40 can be protected by the barrier body 10 , and at the same time, the overall occupied area of ​​the anti-scour device 100 in the axial direction X can be reduced.

[0111] like Figures 3 to 12As shown, in some optional embodiments, an anti-scour device 100 provided by an embodiment of the present application has a plurality of reversing grooves 114 arranged on the barrier cylinder 11, and the plurality of reversing grooves 114 are distributed at intervals in the circumferential direction Y of the barrier cylinder 11, and each reversing groove 114 is formed by an outer wall of the barrier cylinder 11 which is away from the inner cavity 111 and is recessed toward the inner cavity 111.

[0112] The number of the reversing grooves 114 may be two, three or more, and the multiple reversing grooves 114 may be spaced and evenly arranged on the barrier cylinder 11 to ensure uniform force on the anti-scour device 100 when the fluid impacts.

[0113] Along the axial direction X of the barrier tube 11 , the height of the reversing groove 114 may be equal to the height of the barrier tube 11 , and of course, may also be less than the height of the barrier tube 11 .

[0114] An anti-scouring device 100 provided in an embodiment of the present application is provided with a plurality of reversing grooves 114 on the barrier cylinder 11, and the plurality of reversing grooves 114 are spaced apart in the circumferential direction Y of the barrier cylinder 11, so that a reverse fluid can be formed on the outside of the barrier cylinder 11 to counteract the forward fluid, thereby weakening the water flow on the outer wall of the barrier cylinder 11. Moreover, each reversing groove 114 is formed by the outer wall of the barrier cylinder 11 facing away from the inner cavity 111 and concave toward the inner cavity 111, so that the portion of the barrier cylinder 11 concave toward the accommodating cavity can provide resistance to the fluid flowing in the inner cavity 111, so that a portion of the fluid in the inner cavity 111 flows in the reverse direction and counteracts the fluid flowing in the inner cavity 111 in the forward direction, thereby weakening the flow rate of the fluid in the inner cavity 111 again.

[0115] like Figures 3 to 12 As shown, in some optional embodiments, an anti-scour device 100 provided by an embodiment of the present application, the wall surface enclosing the reversing groove 114, the orthographic projection on the axial direction X includes a straight line segment 114a and an arc segment 114b connected to the straight line segment 114a, and the ends of the straight line segment 114a and the arc segment 114b of each reversing groove 114 that are away from each other are both located on the same circular trajectory dd.

[0116] like Fig. 9 As shown, a circular track dd can be drawn with the center of the orthographic projection of the barrier cylinder 11 in the axial direction X as the point, and the orthographic projections of the starting point and the end point of each annular groove are all located on the circular track dd.

[0117] For example, the barrier tube 11 may be cylindrical as a whole, and the reversing groove 114 may be formed by the cylindrical barrier tube 11 being recessed into the interior thereof.

[0118] An anti-scour device 100 provided by an embodiment of the present application is configured such that the orthographic projection of the wall surface enclosing the reversing groove 114 on the axial direction X includes a straight line segment 114a and an arc segment 114b connected to the straight line segment 114a. The ends of the straight line segment 114a and the arc segment 114b of each reversing groove 114 that are away from each other are located on the same circular trajectory dd, which is beneficial for diverting and guiding the fluid outside the anti-scour device 100 through the straight line segment 114a area, and reversing the fluid through the arc segment 114b area, so that part of the fluid after reversal can offset the fluid outside the anti-scour device 100, thereby achieving deceleration, and can further reduce the scouring of the tail vortex aa of the pile foundation 200, thereby ensuring the reliability of the fan foundation 1.

[0119] In some optional embodiments, in an anti-scouring device 100 provided by an embodiment of the present application, an angle β between a tangent direction of a straight line segment 114a of each reversing groove 114 on a circular trajectory dd and an extension direction of the straight line segment 114a satisfies 0<β≤90°.

[0120] The angle α between the tangent direction of the straight segment 114a of each reversing slot 114 on the circular trajectory dd and the extension direction of the straight segment 114a can be selected in the range of 0<α≤60°, and can be selected as 30°, 35°, 40°, 45°, 50°, 55°.

[0121] In the anti-scour device 100 provided in one embodiment of the present application, the angle β can be specifically determined according to the number of reversing grooves 114 distributed in the circumferential direction Y. The above arrangement is conducive to the diversion and reversal of the fluid outside the anti-scour device 100, effectively reducing the scour of the tail vortex aa of the pile foundation 200, and ensuring the reliability of the fan foundation 1.

[0122] like Fig.13 as well as Fig.14 As shown, in some optional embodiments, an overflow port 115 is further provided on the barrier tube 11 . Along the circumferential direction Y of the barrier tube 11 , the overflow port 115 is located between the first opening 112 and the second opening 113 and communicates with the inner cavity 111 .

[0123] The overflow port 115 may be in a circular, elliptical or polygonal shape. The number of the overflow ports 115 may be one, two or more.

[0124] An overflow port 115 may be provided between one side of the first opening 112 in the circumferential direction Y and the second opening 113 , or overflow ports 115 may be provided between both sides of the first opening 112 in the circumferential direction Y and the second opening 113 .

[0125] The anti-scour device 100 provided in one embodiment of the present application can be provided with an overflow port 115, and the overflow port 115 is located between the first opening 112 and the second opening 113 and communicated with the inner cavity 111, so that the fluid in the inner cavity 111 can be ejected from the overflow port 115, which weakens and interferes with the outer fluid, and jointly reduces the speed of the fluid outside the anti-scour device 100. At the same time, since a part of the fluid in the inner cavity 111 is ejected from the overflow port 115, the pressure of the fluid in the inner cavity 111 is reduced, and the volume and flow rate of the fluid flowing out of one of the first opening 112 and the second opening 113 can also be effectively reduced, which is conducive to slowing down the scouring of the tail vortex aa of the pile foundation 200 and ensuring the reliability of the fan foundation 1.

[0126] In some optional embodiments, the anti-scour device 100 provided in the embodiment of the present application has a plurality of overflow ports 115 , at least some of the multiple overflow ports 115 are spaced apart along the axial direction X and at least some of the overflow ports 115 are spaced apart along the circumferential direction Y.

[0127] Through the above arrangement, it is possible to ensure that the fluid in the inner cavity 111 and the fluid outside the anti-scour device 100 are counteracted, and at the same time, it is possible to ensure the strength of the anti-scour device 100, reduce its deformation, and improve the safety and reliability of the anti-scour device 100.

[0128] In some optional embodiments, the anti-scour device 100 provided in the embodiments of the present application, when used in the wind turbine foundation 1, can make the shape of the pile foundation 200 match the shape of the through hole 121 on the end cover 12, and the barrier body 10 is mounted on the pile foundation 200 through the through hole 121 of each end cover 12.

[0129] The wind turbine foundation 1 provided in the embodiment of the present application, because it includes the anti-scouring device 100 provided in the above embodiments, can reduce the scouring of the tail vortex aa on the pile foundation 200, and ensure the reliability of the wind turbine foundation 1. The wind turbine generator set provided in the embodiment of the present application, because it includes the wind turbine foundation 1 provided in the above embodiments, has a strong overall anti-scouring ability of the wind turbine generator set, is conducive to construction, and has high reliability, and can ensure power generation efficiency.

[0130] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An anti-scour device for pile foundation, characterized in that: The anti-scouring device comprises: The barrier body comprises a barrier tube and an end cover, wherein the barrier tube has an inner cavity and is provided with the end covers for closing the inner cavity at both ends of its axial direction, and each end cover is provided with a through hole communicating with the inner cavity, the shape of the through hole matches the shape of the pile foundation and is used for sleeve mounting the pile foundation; the barrier tube is provided with a first opening and a second opening communicating with the inner cavity, and a fluid flow path is formed between the first opening and the second opening; The baffle plate is arranged in the inner cavity and connected to the baffle body. The baffle plate is located on the fluid flow path to provide flow resistance to the fluid entering the inner cavity.

2. The anti-scouring device according to claim 1, characterized in that: The first opening and the second opening are arranged opposite to each other in the radial direction of the barrier cylinder.

3. The anti-scouring device according to claim 1, characterized in that: There are multiple blocking plates, which are spaced apart in the circumferential direction of the blocking cylinder. An angle α is formed between the extension direction of each blocking plate and the arrangement direction of the first opening and the second opening, wherein α<90°.

4. The anti-scouring device according to claim 3, characterized in that: One end of the baffle plate in the axial direction is connected to one of the end covers and the other end is connected to the other end cover. In the radial direction of the baffle tube, one end of the baffle plate facing the baffle tube is spaced apart from the baffle tube and forms a first flow gap. The end of the baffle plate facing away from the baffle tube is aligned with the wall surface of the through hole enclosed by the end cover.

5. The anti-scouring device according to claim 1, characterized in that: The anti-scouring device also includes a baffle, which is arranged on at least one of the end covers, and includes a frame and a blocking portion. The frame is inserted into the end cover and has a channel connected to the inner cavity, and the channel is used to guide the fluid into the inner cavity. The blocking portion is arranged in the channel to provide flow resistance to the fluid entering the channel.

6. The anti-scouring device according to claim 5, characterized in that: The frame includes a first wall and a second wall that are oppositely disposed. Along the axial direction, a plurality of blocking portions are alternately disposed on the first wall and the second wall.

7. The anti-scouring device according to claim 6, characterized in that: The blocking portion includes a partition block and a guide plate, which are spaced apart in the axial direction to form a second flow gap, and the second flow gap of the blocking portion located on one of the first wall and the second wall extends toward the other direction.

8. The anti-scouring device according to claim 7, characterized in that: The dividing block is in the shape of a polygonal block, the guide plate is in the shape of an arc plate, one end of the guide plate is connected to one of the first wall and the second wall and the other end is cantilevered; wherein, in the same blocking portion, one of the top angles of the dividing block is arranged along the axial direction away from the guide plate, and the guide plate is recessed along the axial direction away from the dividing block.

9. The anti-scouring device according to claim 8, characterized in that: The guide plate is arranged perpendicular to the first wall and the second wall in a tangent direction of one end of the cantilever arrangement.

10. The anti-scouring device according to claim 5, characterized in that: The baffle extends into the inner cavity, and the end portion of the baffle in the axial direction is located inside the end cover or is arranged flush with the end cover.

11. The anti-scouring device according to claim 1, characterized in that: The barrier tube is provided with a plurality of reversing grooves, which are spaced apart and distributed in the circumferential direction of the barrier tube, and each of the reversing grooves is formed by an outer wall of the barrier tube which is away from the inner cavity and is recessed toward the inner cavity.

12. The anti-scouring device according to claim 11, characterized in that: The orthographic projection of the wall surface enclosing the commutation groove in the axial direction includes a straight line segment and an arc segment connected to the straight line segment, and the straight line segment and the end of the arc segment of each commutation groove facing away from each other are both located on the same circular trajectory.

13. The anti-scouring device according to claim 12, characterized in that: An angle β between a tangent direction of the straight line segment of each of the reversing grooves on the circular trajectory and an extension direction of the straight line segment satisfies 0<β≤90°.

14. The anti-scour device according to any one of claims 1 to 13, characterized in that: An overflow port is also provided on the barrier tube. Along the circumference of the barrier tube, the overflow port is located between the first opening and the second opening and is in communication with the inner cavity.

15. The anti-scouring device according to claim 14, characterized in that: There are multiple overflow ports, and at least some of the overflow ports are distributed along the axial direction with intervals, and at least some of the overflow ports are distributed along the circumferential direction with intervals.

16. A fan foundation, characterized in that: include: The anti-scouring device according to any one of claims 1 to 15; The pile foundation has a shape matching that of the through hole, and the barrier body is sleeved on the pile foundation through the through holes of each of the end covers.

17. A wind turbine generator set, characterized in that: Comprising the wind turbine foundation as claimed in claim 16.

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