An anti-erosion device for an offshore wind power foundation and an operation method thereof

Abstract

The present invention relates to an anti-erosion device for an offshore wind power foundation and an operation method. The device includes: a sleeve, sleeved outside the pile foundation of the wind power device; an anti-erosion outer cover, sleeved outside the sleeve; a first monitoring device for monitoring the ocean current direction; a sand and gravel collection assembly, including a first slide rail and a collection part. One end of the first slide rail is connected to the outer side wall of the anti-erosion outer cover, and the other end is located outside it. The collection part is arranged on the first slide rail and is used to collect sand and gravel in the water and transport the sand and gravel to a dumping port arranged on the anti-erosion outer cover through the first slide rail for dumping. The collection part is electrically connected to the first monitoring device. According to the monitoring result of the first monitoring device, during the collection process, the collection port faces the ocean current direction, or after the collection is completed and during the return process, the collection port faces away from the ocean current direction. The anti-erosion device in the present invention can stably and quickly supplement sand, gravel and soil around the pile foundation, avoiding the situation that the sand, gravel and soil around the pile foundation are lost too much and become unstable.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power, and particularly to an offshore wind power foundation scour prevention device and an operation method thereof. Background Art

[0002] With the development of offshore wind farm construction projects, the operating environment of wind turbines has become increasingly complex. Wind turbines at sea are mainly affected by the superposition of various complex factors such as wind, loads, waves, and ocean currents. The establishment of offshore wind power structures has led to changes in the surrounding marine environment around the pile foundations. Under the action of ocean dynamics, scour pits will appear around the pile foundations of wind turbines, resulting in a decline in the protection effect of the pile foundations and a deterioration in the stability of the pile foundations. Therefore, a scour prevention device is provided outside the pile foundations to fill the formed scour pits, prevent the scour pits from becoming larger, and achieve a good scour prevention effect.

[0003] The existing offshore wind power foundation scour prevention devices are mainly divided into the following types: rock - throwing scour prevention devices, sand - blanket scour prevention devices, sleeve - type scour prevention devices, and soil - fixing scour prevention devices. Among them, although the rock - throwing scour prevention device has a large amount of rock thrown, the thrown rocks are prone to move and are unstable under the long - term action of water flow. Moreover, the thrown rocks are likely to scratch the anti - corrosion coating on the outer wall of the offshore wind power foundation and are likely to damage facilities such as submarine cables and pipelines during construction. Among them, the bottom - protection and scour - reduction protection measures of the sand - blanket scour prevention device cannot achieve the effect of slowing down the wave - current velocity to fundamentally control scour. Among them, the sleeve - type scour prevention device has limited adaptability to different water flow velocities, water qualities, and underwater topographies. For example, in the sea with a large change in water flow velocity, its scour prevention effect may be unstable. In summary, in view of the problems existing in the current "offshore wind power foundation scour prevention device" such as insufficient protection effect and the need for regular manual participation to supplement crushed stones and quicksand, the "offshore wind power foundation scour prevention device" is invented to solve the above problems. Summary of the Invention

[0004] The present invention provides an offshore wind power foundation scour prevention device that can stably and quickly supplement sand, gravel, and soil around the pile foundation, avoiding the situation of instability caused by excessive loss of sand, gravel, and soil around the pile foundation.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] An offshore wind power foundation scour prevention device, comprising:

[0007] A sleeve for sleeving outside the pile foundation of the wind power device, and the lower end thereof extends into the soil;

[0008] A scour prevention outer cover sleeved on the outer peripheral side of the above - mentioned sleeve, and the lower side wall thereof is open;

[0009] The first monitoring device is used to monitor the ocean current direction outside the pile foundation of the wind power device;

[0010] The sand and gravel collection assembly includes a first slide rail and a collection part. One end of the first slide rail is connected to the outer side wall of the anti-erosion outer cover, and the other end is located outside it. The collection part is arranged on the first slide rail and is used to collect sand and gravel in the water and transport the sand and gravel to the dumping port provided on the anti-erosion outer cover through the first slide rail, and then dump it downward onto the soil surface outside the sleeve;

[0011] The collection part is electrically connected to the first monitoring device. According to the monitoring result of the first monitoring device, during the collection process, the collection port faces the ocean current direction, or after the collection is completed and during the return process, the collection port faces away from the ocean current direction.

[0012] Preferably, the collection part includes a working shovel, a steering device, a dumping driving device, a first sliding bracket, and a first driving assembly;

[0013] The first sliding bracket is slidably arranged on the first slide rail. A first rack is provided on the side wall of the first slide rail arranged along its length direction. The first driving assembly includes a first rotating device and a first driving gear. The first rotating device is arranged inside the first sliding bracket, and the first driving gear is in transmission connection with the first rotating device. The driving teeth of the first driving gear are engaged with the first rack for transmission;

[0014] The steering device is arranged on the upper side wall of the first sliding bracket, and the working shovel is located at the driving end of the steering device so that the working shovel can rotate circumferentially;

[0015] The working shovel is provided with a collection port, and a dumping plate is arranged inside it. One end of the dumping plate close to the collection port is rotatably arranged at the collection port, and the other end far from the collection port is a free end. The dumping driving device is arranged inside the working shovel, and its output end is slidably arranged at the free end of the dumping plate so that the free end of the dumping plate approaches or moves away from the collection port.

[0016] Preferably, when the dumping plate is in the collection state, the free end of the dumping plate is lower than the rotating end of the dumping plate.

[0017] Preferably, a plurality of the sand and gravel collection assemblies are provided and are evenly distributed circumferentially around the sleeve, and one or more of the collection parts carry out the sand and gravel collection and transportation work simultaneously.

[0018] Preferably, the anti-erosion outer cover includes a spherical cover and a cylindrical cover connected to each other, and the spherical cover is arranged above the cylindrical cover.

[0019] Preferably, a pouring opening is provided on the cylindrical cover, and a sliding door group and a second monitoring device are provided at the pouring opening;

[0020] When the second monitoring device detects that the collecting part is close to the pouring opening, the sliding door group opens the pouring opening according to the monitoring result of the second monitoring device, so that the collecting part can enter and pour the collected sand and gravel.

[0021] Preferably, the sliding door group includes a second sliding bracket, a second rotating device, a second driving gear and a sliding sealing plate. A second sliding rail is provided on the inner side wall of the cylindrical cover, and the second sliding rail is arranged in the vertical direction;

[0022] The second sliding bracket is connected to the sliding sealing plate, and the second sliding bracket is slidably arranged on the second sliding rail;

[0023] The second rotating device is arranged in the second sliding bracket. A second rack is provided on the side wall of the second sliding rail along its length. The second driving gear meshes with the second rack to drive the sliding sealing plate to move along the arrangement direction of the second sliding rail, so as to close or open the pouring opening;

[0024] A placement cavity is provided on the inner bottom wall of the cylindrical cover. The placement cavity is used to place the sliding sealing plate, and the lower end of the sliding sealing plate is always located in the placement cavity.

[0025] Preferably, a bearing plate is provided on the outer side wall of the lower end of the sleeve. There is a certain distance between the bearing plate and the bottom of the anti-erosion outer cover. The bearing plate sinks into the soil bottom, and an upper-end open bearing cavity is formed on the upper side wall of the bearing plate.

[0026] An operation method of the offshore wind power foundation anti-erosion device based on the above, a third monitoring device is provided in the anti-erosion outer cover for monitoring the sand and gravel condition around the lower end of the sleeve. The operation method includes:

[0027] The third monitoring device monitors the sand and gravel condition around the lower end of the sleeve, and judges whether to supplement sand and gravel according to the sand and gravel loss situation;

[0028] If there is no need to supplement sand and gravel, the sand and gravel collection component is not started, and the collection port of the collection part faces the ocean current direction to collect sand and gravel;

[0029] If sand and gravel need to be replenished, the sand and gravel collection component is started. When the sand and gravel are replenished for the first time, the collection part directly transports the sand and gravel to the dumping port of the anti-scour outer cover for dumping. After the dumping is completed, the collection part returns to the collection position along the original route, so that the collection port of the collection part faces the direction of the ocean current, and the sand and gravel collection continues. After a certain period of collection, the sand and gravel are continuously transported to the dumping port of the anti-scour outer cover for dumping, until the third monitoring device detects that the sand and gravel around the lower end of the sleeve does not need to be replenished, then the sand and gravel collection component is stopped, and the collection part returns to the collection position to continue collecting. When the collection part is in the collection position, the collection port faces the direction of the ocean current;

[0030] During the process of transporting the collecting part to the anti-scour outer cover, the collecting port of the collecting part faces away from the direction of the ocean current, and after the collecting part dumps the sand and gravel, during the process of returning, the collecting port of the collecting part faces the direction of the ocean current, collecting while returning.

[0031] Preferably, the sand and gravel collecting components in the anti-scour device include a plurality of sand and gravel collecting components, which are evenly distributed along the circumference of the sleeve; and the operation method further includes:

[0032] If the third monitoring device detects that the sand and gravel around the lower end of the sleeve need to be replenished, it will drive the collecting parts in the corresponding directions to work according to the loss of sand and gravel in various directions, so as to replenish the sand and gravel in various directions of the lower end of the sleeve until the sand and gravel in the corresponding directions are replenished, and the collecting parts in the corresponding directions stop working and stay at the collection position.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. By setting up a collection unit, the external sand and gravel are collected to backfill to ensure the amount of sand and gravel around the seabed pile foundation, so as to maintain the overall sand and gravel content and the thickness of the sand blanket, and enhance the anti-scouring ability of the pile foundation as much as possible;

[0035] 2. Through the cooperation of the first monitoring device and the sand and gravel collection component, the collection port of the collection part is facing or facing away from the ocean current direction during different working processes to ensure the amount of sand and gravel backfilled each time, and the amount of sand and gravel backfilled within the cycle is greater, thereby making the pile foundation more erosion-resistant and the maintenance cycle longer, further freeing up manpower and reducing the maintenance costs of manpower and material resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1Isometric view of the overall device of the embodiment in the present invention;

[0038] Figure 2 Front view of the overall device of the embodiment in the present invention;

[0039] Figure 3 Bottom view of the erosion-proof outer cover of the embodiment in the present invention;

[0040] Figure 4 Partial cross-sectional view of the erosion-proof outer cover of the embodiment in the present invention;

[0041] Figure 5 Schematic diagram of the collection part of the embodiment in the present invention;

[0042] Figure 6 Schematic diagram of the working shovel of the embodiment in the present invention.

[0043] Explanation of reference numerals:

[0044] 1, Pile foundation; 2, Sleeve; 3, Erosion-proof outer cover; 31, Spherical cover; 32, Cylindrical cover; 33, Pouring port; 34, Placing plate; 5, First slide rail; 6, Collection part; 61, Working shovel; 611, Collection port; 612, Pouring plate; 62, Steering device; 63, First sliding bracket; 64, First driving assembly; 641, First rotating device; 642, First driving gear; 65, Pouring driving device; 7, Sliding door group; 71, Second sliding bracket; 72, Sliding sealing plate; 8, Bearing plate. Detailed implementation manners

[0045] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the protection scope of the present invention.

[0046] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0047] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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 a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0048] As Figures 1 - 6 shown, an embodiment of the present invention provides an anti-erosion device for an offshore wind power foundation, which specifically includes a sleeve 2, an anti-erosion outer cover 3, a first monitoring device (not shown in the figure), and a sand and gravel collection assembly; wherein the sleeve 2 is installed outside the pile foundation 1 of the wind power device, and the lower end of the sleeve 2 extends into the soil body along with the pile foundation 1. The anti-erosion outer cover 3 is sleeved on the outer peripheral side of the sleeve 2, and the lower side wall of the sleeve 2 is provided with an opening so that sand and gravel can fall into the soil body to fill the erosion opening. The sand and gravel collection assembly includes a first slide rail 5 and a collection part 6. One end of the first slide rail 5 is connected to the outer side wall of the anti-erosion outer cover 3, and the other end is located outside it. The collection part 6 is installed on the first slide rail 5 and can slide on the first slide rail 5. Specifically, the collection part 6 is used to collect sand and gravel in the water. After the collection is completed, the sand and gravel are transported to the dumping port 33 at the anti-erosion outer cover 3 through the first slide rail 5 and poured downward onto the soil surface outside the sleeve 2 inside the anti-erosion outer cover 3, so as to fill the eroded part of the soil surface outside the pile foundation 1 of the wind power device, making the pile foundation 1 more stable. The collection part 6 is electrically connected to the first monitoring device. The collection part 6 can, according to the monitoring results of the first monitoring device, make the collection port 611 of the collection part 6 face the ocean current direction during the collection process, so that the sand and gravel in the water can directly enter the collection cavity of the collection part 6 through the collection port 611 for collection, or when it is necessary to fill the soil around the pile foundation 1, during the process of the collection part 6 sliding on the first slide rail 5, make the collection port 611 face away from the ocean current direction, so as to avoid the loss of sand and gravel to a certain extent.

[0049] Maintenance personnel can set a certain period and periodically start the collection part 6 to collect sand and gravel and supplement the sand and gravel to the soil around the pile foundation 1; or a third monitoring device (not shown in the figure) is provided on the inner side wall of the anti-erosion outer cover 3. The third monitoring device is electrically connected to the collection part 6. The third monitoring device can be a camera, which is used to monitor the soil picture outside the lower pile foundation 1, and decide whether to start the collection part 6 according to the monitored soil picture. Maintenance personnel can manually or intelligently judge according to the camera picture (prior art), and then decide whether to start the collection part 6 to collect sand, gravel and soil.

[0050] In summary, by setting up the collection part 6, the amount of sand and gravel around the submarine pile foundation 1 is ensured by collecting external sand and gravel for backfilling, so as to maintain the overall sand and gravel content and the thickness of the sand blanket, and as much as possible enhance the erosion prevention ability of the pile foundation 1; moreover, by adjusting the orientation of the collection port 611 on the collection part 6, the collection efficiency of the collection part 6 is better during the collection process, the amount of sand and gravel collected within a certain period of time is more, and during the transportation process, the loss of sand and gravel in the collection part 6 is avoided, and the amount of sand and gravel backfilled each time is ensured. During the operation cycle of the collection part 6, the amount of sand and gravel backfilled is more, so that the erosion prevention ability of the pile foundation 1 is stronger, the maintenance cycle is longer, the labor is further liberated, and the maintenance cost of human and material resources is reduced.

[0051] After actual installation, the lower side wall of the erosion prevention outer cover 3 will be embedded in the soil body, and the lower side wall of the external slide rail fits the soil surface, so that the collection part 6 can collect sand and gravel by fitting the soil surface, making it easier to collect sand and gravel. Moreover, it also makes the erosion prevention outer cover 3 basically a sealed space to ensure that the soil body outside the pile foundation 1 of the wind power device will not be lost in large quantities. Even if it is washed away, the amount of sand and gravel washed away each time will be reduced, to a certain extent ensuring that the soil body outside the pile foundation 1 of the wind power device will not be lost in large quantities and ensuring the stability of the pile foundation 1.

[0052] Specifically, the collecting part 6 includes a working shovel 61, a steering device 62, a dumping drive device 65, a first sliding bracket 63 and a first driving assembly 64, wherein the inner side wall of the first sliding bracket 63 is provided with a slide groove, and the first sliding bracket 63 is slidably installed on the first slide rail 5 through the slide groove. In order to enable the collecting part 6 to move along the first slide rail 5, a first rack is provided on the side wall of the first slide rail 5 along its length direction. Correspondingly, the first driving assembly 64 includes a first rotating device 641 and a first driving gear 642, wherein the first rotating device 641 can be a motor, which is installed in the installation cavity of the inner side wall of the first sliding bracket 63, the first driving gear 642 is transmission-connected with the first rotating device 641, and is installed on the driving shaft of the first driving gear 642, the first driving gear 642 partially passes through the installation cavity and is located on its outer side, and is meshed with the first rack on the side wall of the first slide rail 5 in the slide groove for transmission, so that the first driving device drives the first driving gear 642 to rotate in forward and reverse directions, and is used in conjunction with the first rack. The first sliding bracket 63 can move in the positive direction or the direction along the first slide rail 5, and the steering device 62 can be a pan head, which is installed on the upper side wall of the first sliding bracket 63, and the working shovel 61 is located at the driving end of the steering device 62. The steering device 62 can drive the working shovel 61 to rotate in the circumferential direction, and the working shovel 61 is provided with a collecting port 611, and a dumping plate 612 is provided inside thereof. The dumping plate 612 is used to hold the collected sand and gravel, wherein the dumping plate 612 is rotatably arranged at the collecting port 611 at one end thereof. 11, the end away from the collecting port 611 is a free end, the dumping drive device 65 is arranged in the working shovel 61, and the output end is slidably arranged on the lower side wall of the free end of the dumping plate 612. Driven by the dumping drive device 65, the free end of the dumping plate 612 can be moved close to or away from the collecting port 611, wherein the dumping drive device 65 can be a motor linear push rod, which is installed in the installation cavity below the dumping plate 612, and its output rod is upward and slidably arranged on the lower side wall of the free end of the dumping plate 612. The specific working process is: the steering device 62 rotates the working shovel 61 according to the monitoring result of the first monitoring device, that is, the direction of the ocean current, and the collecting port 611 of the working shovel 61 faces the direction of the ocean current to collect sand and gravel. After the sand and gravel are collected, the first rotating device 641 is started, and driven by the first driving gear 642 and the first rack, it moves forward on the first slide rail 5 to the dumping port 33 of the anti-scour outer cover 3. After dumping the sand and gravel, it moves in the opposite direction on the first slide rail 5 driven by the first rotating device 641 to the collection position to continue collecting and standby.

[0053] Specifically, preferably, Figure 6As shown, when the tipping plate 612 is in the collection state, the free end of the tipping plate 612 is lower than the rotating end of the tipping plate 612, that is, the initial state of the tipping plate 612 is an inclined state, so that a concave storage space is formed between the tipping plate 612 and the inner side wall of the working shovel 61, which is convenient for storing sand and gravel, and also makes it not easy for the sand and gravel to be carried away by the water flow again after entering the working shovel 61.

[0054] Specifically, a plurality of sand and gravel collection components are provided and are circumferentially and evenly distributed around the sleeve 2, that is, a plurality of first slide rails 5 are arranged around the sleeve 2, and a plurality of collection parts 6 slide correspondingly on the plurality of first slide rails 5. In this embodiment, there are 8 first slide rails 5 and 8 collection parts 6 correspondingly, and the interval between two adjacent ones is 45 degrees. Thus, during use, one or more collection parts 6 can carry out the sand and gravel collection and transportation work simultaneously to ensure the efficiency of sand and gravel collection, quickly fill the lost sand and gravel around the pile foundation 1, and ensure the stability of the pile foundation 1. To ensure the stability of the first track, an annular reinforcing rod is connected between the plurality of first tracks, so that the plurality of first tracks are connected to form a whole.

[0055] Specifically, the anti-erosion outer cover 3 includes a spherical cover 31 and a cylindrical cover 32 connected to each other. The spherical cover 31 is located above the cylindrical cover 32. Among them, the first slide rail 5 is connected to the outer side wall of the cylindrical outer cover. The outer side wall of the cylindrical outer cover is arc-shaped. Compared with a square outer cover, it can greatly reduce the impact of water flow and disperse the impact force of the water flow. The surface arc of the spherical cover 31 has better ability to disperse impact compared with the circumferential arc of the cylindrical outer cover, and can effectively enhance the impact resistance of the whole pile foundation 1. Specifically, the cylindrical cover 32 is connected to the outer side wall of the sleeve 2 through a plurality of reinforcing ribs to strengthen the connection between the sleeve 2 and the anti-erosion outer cover 3.

[0056] Specifically, a tipping opening 33 is provided on the cylindrical cover 32. A sliding door group 7 and a second monitoring device (not shown in the figure) are provided at the tipping opening 33. When the second monitoring device detects that the collection part 6 is close to the tipping opening 33, the sliding door group 7 will open the tipping opening 33 according to the monitoring result of the second monitoring device to allow the collection part 6 to tip the collected sand and gravel. After the collection part 6 has tipped the sand and gravel, the collection part 6 moves away from the anti-erosion outer cover 3 along the first slide rail 5. When the second monitoring device detects this, the sliding door group 7 will close the tipping opening 33 according to the monitoring result of the second monitoring device, making the entire anti-erosion outer cover 3 basically closed. This can prevent the sand and gravel around the pile foundation 1 from being washed away and flowing out through the tipping opening 33 due to the opening of the tipping opening 33 during the collection process by the collection shovel. Specifically, the second monitoring device can be an electromagnetic sensor. Based on the principle of electromagnetic induction, when a machine made of metal runs on the first slide rail 5, it will cause a change in the surrounding magnetic field. The electromagnetic sensor can detect this magnetic field change to identify the arrival of the machine. It has a high sensitivity to metal objects, can accurately detect the metal machine on the first slide rail 5, and is not directly affected by factors such as the salinity of seawater.

[0057] Specifically, the sliding door group 7 includes a second sliding bracket 71, a second rotating device, a second driving gear, and a sliding sealing plate 72. A second sliding rail is provided on the inner side wall of the cylindrical cover 32, and the second sliding rail is arranged in the vertical direction. The second sliding bracket 71 is located above the sliding sealing plate 72 and is connected to the upper end of the sliding sealing plate 72. Both the second sliding bracket 71 and the sliding sealing plate 72 are arranged in the sliding groove, and both slide on the second sliding rail through the sliding groove. Among them, the second rotating device can be a motor and is installed in the installation cavity inside the second sliding bracket 71. The second driving gear is connected to the driving shaft of the second rotating device, and a second rack is arranged on the side wall of the second sliding rail along its length. The second driving gear meshes with the second rack for transmission. Thus, when the second rotating device rotates, it can drive the sliding sealing plate 72 to move along the second sliding rail, and can close or open the dumping port 33. Correspondingly, since the lower end of the cylindrical cover 32 is inserted into the soil, when the sliding sealing plate 72 slides downward, the lower part of the sliding sealing plate 72 will also be inserted into the soil. Due to the blockage of the soil, the output force of the second rotating device will increase, and after long-term use, it will cause damage to the sliding door group 7. Therefore, a placement plate 34 is provided on the inner side wall of the bottom of the cylindrical cover 32. The placement plate 34 is provided with a placement cavity with an open upper end for placing the sliding sealing plate 72. When the sliding sealing plate 72 slides downward to open the dumping port 33, the lower part of the sliding sealing plate 72 will enter the placement cavity and will not contact the soil, thereby making the sliding of the sliding sealing plate 72 smoother and not increasing the output force of the second rotating device. Further, the lower end of the sliding sealing plate 72 is always located in the placement cavity. Even when the sliding sealing plate 72 closes the dumping port 33, the lower part of the sliding sealing plate 72 is also located in the placement cavity, avoiding the situation that sand, gravel, and soil enter the placement cavity and affect the downward sliding of the sliding sealing plate 72, and ensuring the smoothness of the sliding of the sliding sealing plate 72.

[0058] Specifically, a bearing plate 8 is provided on the outer side wall of the lower end of the sleeve 2. The bearing plate 8 is at a certain distance from the bottom of the anti-scouring outer cover 3. The bearing plate 8 sinks into the bottom of the soil, covers a certain depth of sand and gravel soil, can enhance the installation strength of the anti-scouring device, and since the anti-scouring device is installed outside the pile foundation 1, the bearing plate 8 also plays a role in bottom support, making the pile foundation 1 more stable. Moreover, the bearing plate 8 can also prevent the loss of the soil below to a certain extent and ensure the depth of the soil at the bottom of the fixed pile foundation 1. A bearing cavity with an open upper end is formed on the upper side wall of the bearing plate 8 for bearing sand and gravel. Compared with the horizontal upper side wall, the bearing and supporting effect of the bearing plate 8 is better. In this embodiment, the inner side wall of the bearing cavity is set as a spherical surface.

[0059] The present invention also discloses an operation method of an anti-scouring device for an offshore wind power foundation, including:

[0060] First, the third monitoring device continuously monitors the gravel condition around the lower end of the sleeve 2, and determines whether to supplement gravel according to the gravel loss situation. If no gravel supplement is needed, the gravel collection assembly is not activated, and the collection part 6 is located at the collection position. According to the monitoring result of the first monitoring device, the steering device 62 makes the collection port 611 of the collection part 6 face the ocean current direction to collect gravel.

[0061] If gravel supplement is needed, the gravel collection assembly is activated. That is, when the gravel is supplemented for the first time, the collection part 6 is directly driven by the first rotating device 641 to approach the anti-erosion outer cover 3 along the first slide rail 5. The second monitoring device monitors the approach of the collection part 6, and the sliding door group 7 opens the dumping port 33. When reaching the dumping port 33, the dumping driving device 65 works to make the dumping plate 612 rotate to dump the gravel. After the dumping is completed, the dumping plate 612 returns to its original position, and the collection part 6 moves away from the anti-erosion outer cover 3. At the same time, the second monitoring device monitors the departure of the collection part 6, and the sliding door group 7 closes the dumping port 33. The collection part 6 returns to the collection position along the original path, making the collection port 611 of the collection part 6 face the ocean current direction, and continues to collect gravel. After collecting for a certain period of time (as specified by the operator), it is then transported to the anti-erosion outer cover 3 for dumping until the third monitoring device monitors that the gravel around the lower end of the sleeve 2 does not need to be supplemented, then the gravel collection assembly stops working, and the collection part 6 returns to the collection position to continue collecting. When the collection part 6 is at the collection position, the collection port 611 faces the ocean current direction.

[0062] During the process of transporting the collection part 6 to the anti-erosion outer cover 3, the collection port 611 of the collection part 6 faces away from the ocean current direction, which can avoid the re-loss of gravel during transportation to a certain extent. And after the collection part 6 dumps the gravel and returns, the collection port 611 of the collection part 6 faces the ocean current direction, and it collects while returning, so that the gravel collection amount is more within a certain period of time.

[0063] Among them, in this embodiment, during the gravel supplement process, the collection time for each gravel collection (except the first time for gravel replenishment in each cycle) is fixed, and the transportation process, dumping process, and return process are all fixed, which is a cycle. The time of the cycle is set according to the needs of the staff.

[0064] Specifically, the operation method further includes:

[0065] If the third monitoring device monitors that the gravel around the lower end of the sleeve 2 needs to be supplemented, it correspondingly drives the collection part 6 in each direction to work according to the gravel loss situation in each direction to correspondingly supplement the gravel at each azimuth of the lower end of the sleeve 2 until the gravel at the corresponding azimuth is supplemented, and the collection part 6 in the corresponding direction stops working and returns to the collection position, making the gravel replenishment process efficient and rapid.

[0066] The above method enables a larger and more stable amount of stone replenishment throughout the gravel cycle, can extend the required maintenance cycle, and makes the scour prevention ability of the wind power pile foundation 1 stronger.

[0067] The above embodiments are only the preferred embodiments of the present invention, and the scope of protection of the present invention cannot be limited thereby. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention fall within the scope of protection required by the present invention.

Claims

1. An offshore wind power foundation anti-scour device, characterized in that: include: The sleeve is used to be sleeved on the outside of the pile foundation of the wind turbine, and the lower end thereof extends into the soil; An anti-scour outer cover is sleeved on the outer peripheral side of the sleeve and is opened toward the lower side wall; A first monitoring device is used to monitor the direction of the ocean current outside the pile foundation of the wind turbine; A sand and gravel collecting assembly, comprising a first slide rail and a collecting portion, wherein one end of the first slide rail is connected to the outer side wall of the anti-scour cover, and the other end is located outside the anti-scour cover, and the collecting portion is arranged on the first slide rail, and is used to collect sand and gravel in the water and transport the sand and gravel to the dumping port arranged on the anti-scour cover through the first slide rail, and dump the sand and gravel downward onto the soil surface outside the sleeve; The collecting part is electrically connected to the first monitoring device. According to the monitoring result of the first monitoring device, the collecting part makes the collecting port face the direction of the ocean current during the collection process, or turns the collecting port away from the direction of the ocean current after the collection is completed and during the return process.

2. The anti-scouring device according to claim 1, characterized in that: The collecting part includes a working shovel, a steering device, a dumping drive device, a first sliding bracket and a first drive assembly; The first sliding bracket is slidably arranged on the first sliding rail, and a first rack is arranged on a side wall of the first sliding rail arranged along its length direction, and the first driving assembly includes a first rotating device and a first driving gear, the first rotating device is arranged in the first sliding bracket, the first driving gear is transmission-connected with the first rotating device, and the driving teeth of the first driving gear are meshed with the first rack for transmission; The steering device is arranged on the upper side wall of the first sliding bracket, and the working shovel is located at the driving end of the steering device so that the working shovel rotates circumferentially; The working shovel is provided with a collecting port, and a dumping plate is provided inside the working shovel. The end of the dumping plate close to the collecting port is rotatably provided at the collecting port, and the end away from the collecting port is a free end. The dumping drive device is provided in the working shovel, and the output end is slidably provided at the free end of the dumping plate, so that the free end of the dumping plate is close to or away from the collecting port.

3. The anti-scouring device according to claim 2, characterized in that: When the pouring plate is in the collecting state, the free end of the pouring plate is lower than the rotating end of the pouring plate.

4. The anti-scouring device according to claim 1, characterized in that: The sand and gravel collecting components are arranged in plurality and are evenly distributed around the circumference of the sleeve, and one or more of the collecting parts simultaneously perform sand and gravel collection and transportation work.

5. The anti-scouring device according to claim 1, characterized in that: The anti-scour outer cover comprises a spherical cover and a cylindrical cover which are connected to each other, and the spherical cover is arranged above the cylindrical cover.

6. The anti-scouring device according to claim 5, characterized in that: The cylindrical cover is provided with a pouring port, and a sliding door group and a second monitoring device are provided at the pouring port; The second monitoring device detects that the collecting part is close to the dumping port, and the sliding door group opens the dumping port according to the monitoring result of the second monitoring device to allow the collecting part to enter and dump the collected sand and gravel.

7. The anti-scouring device according to claim 6, characterized in that: The sliding door assembly includes a second sliding bracket, a second rotating device, a second driving gear and a sliding sealing plate, and the inner side wall of the cylindrical cover is provided with a second sliding rail, and the second sliding rail is arranged in the vertical direction; The second sliding bracket is connected to the sliding sealing plate, and the second sliding bracket is slidably arranged on the second sliding rail; The second rotating device is arranged in the second sliding bracket, and a second rack is arranged on the side wall of the second slide rail along the length thereof, and the second driving gear is meshed with the second rack to drive the sliding sealing plate to move along the setting direction of the second slide rail to close or open the pouring port; The bottom inner wall of the cylindrical cover is provided with a placement cavity, and the placement cavity is used to place the sliding sealing plate, and the lower end of the sliding sealing plate is always located in the placement cavity.

8. The anti-scouring device according to claim 1, characterized in that: A bearing plate is disposed on the outer side wall of the lower end of the sleeve. The bearing plate and the bottom of the anti-scour cover are at a certain distance. The bearing plate is sunk into the soil bottom, and a bearing cavity with an upper end opening is formed on the upper side wall of the bearing plate.

9. An operating method of the offshore wind power foundation anti-scour device according to any one of claims 1 to 8, characterized in that: A third monitoring device is provided in the anti-scour outer cover for monitoring the sand and gravel conditions around the lower end of the sleeve, and the operation method includes: The third monitoring device monitors the sand and gravel conditions around the lower end of the sleeve, and determines whether to replenish sand and gravel according to the sand and gravel loss situation; If there is no need to replenish sand and gravel, the sand and gravel collection component will not be started, and the collection port of the collection part will face the direction of the ocean current to collect sand and gravel; If sand and gravel need to be replenished, the sand and gravel collection component is started. When the sand and gravel are replenished for the first time, the collection part directly transports the sand and gravel to the dumping port of the anti-scour outer cover for dumping. After the dumping is completed, the collection part returns to the collection position along the original route, so that the collection port of the collection part faces the direction of the ocean current, and the sand and gravel collection continues. After a certain period of collection, the sand and gravel are continuously transported to the dumping port of the anti-scour outer cover for dumping, until the third monitoring device detects that the sand and gravel around the lower end of the sleeve does not need to be replenished, then the sand and gravel collection component is stopped, and the collection part returns to the collection position to continue collecting. When the collection part is in the collection position, the collection port faces the direction of the ocean current; During the process of transporting the collecting part to the anti-scour outer cover, the collecting port of the collecting part faces away from the direction of the ocean current, and after the collecting part dumps the sand and gravel, during the process of returning, the collecting port of the collecting part faces the direction of the ocean current, collecting while returning.

10. The method for operating the offshore wind power foundation anti-scour device according to claim 9, characterized in that: The sand and gravel collecting components in the anti-scour device include a plurality of sand and gravel collecting components, which are evenly distributed along the circumference of the sleeve; the operation method also includes: If the third monitoring device detects that the sand and gravel around the lower end of the sleeve need to be replenished, it will drive the collecting parts in the corresponding directions to work according to the loss of sand and gravel in various directions, so as to replenish the sand and gravel in various directions of the lower end of the sleeve until the sand and gravel in the corresponding directions are replenished, and the collecting parts in the corresponding directions stop working and stay at the collection position.

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