Offshore wind power foundation anti-scour device and operation method

Abstract

The invention relates to an offshore wind power foundation anti-scouring device and an operation method, and the device comprises a sleeve which sleeves the outer side of a pile foundation of a wind power device; the outer side of the sleeve is sleeved with the anti-scouring outer cover; the first monitoring device is used for monitoring the ocean current direction; the gravel collecting assembly comprises a first sliding rail and a collecting part, one end of the first sliding rail is connected to the outer side wall of the anti-scouring outer cover, the other end of the first sliding rail is located on the outer side of the anti-scouring outer cover, and the collecting part is arranged on the first sliding rail and used for collecting gravel in water and transporting the gravel to a dumping opening formed in the anti-scouring outer cover through the first sliding rail to be dumped; the collecting part is electrically connected with the first monitoring device, and according to the monitoring result of the first monitoring device, the collecting part enables the collecting port to directly face the ocean current direction in the collecting process, or the collecting port is back to the ocean current direction after collecting is completed and in the returning process. The anti-scour device can stably and rapidly supplement gravel and soil to the periphery of the pile foundation, and the situation that the gravel and soil around the pile foundation are too much lost and unstable is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power generation, and in particular to an offshore wind power generation foundation anti-scour 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 are mainly affected by the superposition of multiple complex factors such as wind, load, waves, and ocean currents at sea. The establishment of offshore wind power structures has caused the pile foundation to change the surrounding marine environment. Under the action of ocean power, scour pits will appear around the pile foundations of wind turbines, resulting in a decrease in the protective effect of the pile foundation and a deterioration in the stability of the pile foundation. Therefore, anti-scour devices will be installed on the outside of the pile foundation to fill the scour pits formed and prevent the scour pits from becoming larger, thus achieving a good anti-scour effect.

[0003] The existing offshore wind power foundation anti-scour devices are mainly divided into the following types: riprap anti-scour devices, sand blanket anti-scour devices, sleeve anti-scour devices, and solid soil anti-scour devices; among them, the riprap anti-scour device has a large amount of riprap, and the riprap is easy to move and unstable under the long-term action of water flow, and the riprap is easy to scratch the anti-corrosion coating on the outer wall of the offshore wind power foundation, and it is easy to damage submarine cables, pipelines and other facilities during construction; among them, the sand blanket anti-scour device bottom protection and scour reduction protection measures cannot achieve the effect of slowing down the wave flow velocity to fundamentally control the scour; among them, the sleeve anti-scour device has limited adaptability to different water flow speeds, water quality and underwater topography. For example, in the sea where the water flow speed changes greatly, its anti-scour effect may be unstable. In summary, in view of the current "offshore wind power foundation anti-scour device" has insufficient protection effect and needs regular human participation to supplement gravel and quicksand, "an offshore wind power foundation anti-scour device" is invented to solve the above problems. Summary of the invention

[0004] The present invention provides an offshore wind power foundation anti-scour device, which can stably and quickly replenish sand, gravel and soil around the pile foundation to avoid excessive loss of sand, gravel and soil around the pile foundation and cause instability.

[0005] To achieve the above object, the present invention adopts the following technical solutions: An offshore wind power foundation anti-scour device, comprising: 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; The sand and gravel collecting assembly comprises a first slide rail and a collecting part, wherein one end of the first slide rail is connected to the outer wall of the anti-scour cover, and the other end is located outside the anti-scour cover. The collecting 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 pouring port arranged on the anti-scour cover through the first slide rail, and pour 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 faces the direction of the ocean current during the collection process, or faces the back of the ocean current during the return process after the collection is completed.

[0006] Preferably, the collecting part comprises 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 the length direction thereof. The first driving assembly comprises a first rotating device and a first driving gear, and 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 can rotate in the circumferential direction; The working shovel is provided with a collecting port, and a dumping plate is provided inside the working shovel. One 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 driving 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.

[0007] Preferably, 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.

[0008] Preferably, the above-mentioned sand and gravel collecting components are provided in plurality and are evenly distributed around the circumference of the above-mentioned sleeve, and one or more of the above-mentioned collecting parts perform sand and gravel collection and transportation work simultaneously.

[0009] Preferably, the anti-scour outer cover comprises a spherical cover and a cylindrical cover connected to each other, and the spherical cover is arranged above the cylindrical cover.

[0010] Preferably, 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.

[0011] Preferably, the sliding door assembly comprises 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 a 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 arranged along its length, 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.

[0012] Preferably, a bearing plate is provided 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 the upper side wall of the bearing plate forms a bearing cavity with an open upper end.

[0013] An operating method based on the above-mentioned anti-scour device for offshore wind power foundation, wherein a third monitoring device is arranged in the above-mentioned anti-scour cover for monitoring the sand and stone condition around the lower end of the sleeve, and the operating method comprises: 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 conditions; 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 has dumped 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.

[0014] Preferably, the sand and stone collecting components in the anti-scour device include a plurality of sand and stone collecting components, which are evenly distributed along the circumference of the sleeve; and the operation method further 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.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 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; 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 direction of the ocean current 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

[0016] 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.

[0017] Figure 1 It is an overall stereogram of the device of an embodiment of the present invention; Figure 2 It is an overall front view of the device in the embodiment of the present invention; Figure 3 A bottom view of the anti-scour cover of an embodiment of the present invention; Figure 4 A partial cross-sectional view of an anti-scour cover according to an embodiment of the present invention; Figure 5 It is a schematic diagram of a collection part in an embodiment of the present invention; Figure 6 Schematic diagram of a mobile phone shovel according to an embodiment of the present invention.

[0018] Description of reference numerals: 1. Pile foundation; 2. Sleeve; 3. Anti-scour outer cover; 31. Spherical cover; 32. Cylindrical cover; 33. Dumping port; 34. Placement plate; 5. First slide rail; 6. Collecting part; 61. Working shovel; 611. Collecting port; 612. Dumping plate; 62. Steering device; 63. First sliding bracket; 64. First driving assembly; 641. First rotating device; 642. First driving gear; 65. Dumping driving device; 7. Sliding door group; 71. Second sliding bracket; 72. Sliding sealing plate; 8. Load-bearing plate. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] like Figure 1-Figure 6As shown, an embodiment of the present invention provides an offshore wind power foundation anti-scour device, specifically comprising a sleeve 2, an anti-scour outer cover 3, a first monitoring device (not shown in the figure) and a sand and stone collecting assembly; wherein the sleeve 2 is installed on the outside of the pile foundation 1 of the wind power device, and the lower end of the sleeve 2 extends into the soil along with the pile foundation 1, wherein the anti-scour outer cover 3 is sleeved on the outer peripheral side of the sleeve 2, and the lower side wall of the sleeve 2 is opened so that sand and stones fall into the soil to fill the scour opening, wherein the sand and stone collecting assembly comprises a first slide rail 5 and a collecting part 6, one end of the first slide rail 5 is connected to the outer side wall of the anti-scour outer cover 3, and the other end is located on the outside thereof, the collecting part 6 is installed on the first slide rail 5 and can slide on the first slide rail 5, specifically, the collecting part 6 is used to collect sand and stones in the water, and after the collection is completed, the sand and stones are collected through the first slide rail 5 The sand and gravel are transported to the dumping port 33 of the anti-scour outer cover 3, and dumped downward onto the soil surface outside the inner sleeve 2 of the anti-scour outer cover 3, thereby filling the washed part of the soil surface outside the pile foundation 1 of the wind turbine, so that the pile foundation 1 has better stability. The collecting part 6 is electrically connected to the first monitoring device. The collecting part 6 can be based on the monitoring result of the first monitoring device, so that during the collection process, the collecting port 611 of the collecting part 6 faces the direction of the ocean current, and the sand and gravel in the water flow can directly enter the collecting cavity of the collecting part 6 through the collecting port 611 for collection. Or, when it is necessary to fill the soil around the pile foundation 1, the collecting port 611 is turned away from the direction of the ocean current while the collecting part 6 slides on the first slide rail 5, thereby avoiding the loss of sand and gravel to a certain extent.

[0023] The maintenance personnel can set a certain period to periodically start the collection unit 6 to collect sand and gravel and replenish 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 wall of the anti-scour cover 3, and the third monitoring device is electrically connected to the collection unit 6. The third monitoring device can be a camera for monitoring the soil image outside the pile foundation 1 below, and decide whether to start the collection unit 6 according to the monitored soil image. The maintenance personnel can manually or intelligently judge according to the camera image (existing technology), and then decide whether to start the collection unit 6 to collect sand and gravel.

[0024] In summary, by setting up the collecting part 6, the external sand and gravel are collected for backfilling to ensure the amount of sand and gravel around the seabed pile foundation 1, 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 1 as much as possible; and by adjusting the direction of the collecting port 611 on the collecting part 6, the collecting efficiency of the collecting part 6 is better during the collection process, and more sand and gravel can be collected within a certain period of time. In addition, during the transportation process, the loss of sand and gravel in the collecting part 6 is avoided, and the amount of sand and gravel backfilled each time is guaranteed. During the operation cycle of the collecting part 6, more sand and gravel are backfilled, thereby making the anti-scouring ability of the pile foundation 1 stronger and the maintenance cycle longer, further liberating manpower and reducing the maintenance cost of manpower and material resources.

[0025] After actual installation, the lower side wall of the anti-scour cover 3 will be embedded in the soil, and the lower side wall of the external slide rail will fit the soil surface, so that the collecting part 6 can fit the soil surface to collect sand and gravel, making it easier to collect sand and gravel, and also making the anti-scour cover 3 basically a sealed space to ensure that the soil outside the pile foundation 1 of the wind turbine 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, which to a certain extent ensures that the soil outside the pile foundation 1 of the wind turbine will not be lost in large quantities, thereby ensuring the stability of the pile foundation 1.

[0026] 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. 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.

[0027] Specifically, preferably, Figure 6As shown, when the pouring plate 612 is in the collecting state, the free end of the pouring plate 612 is lower than the rotating end of the pouring plate 612, that is, the initial state of the pouring plate 612 is an inclined state, so that the pouring plate 612 and the inner wall of the working shovel 61 form a concave storage space, which is convenient for the storage of sand and gravel, and also makes it difficult for the sand and gravel to be transported out again by the water flow after entering the working shovel 61.

[0028] Specifically, the sand and gravel collection components are arranged in multiple numbers and are evenly distributed around the sleeve 2, that is, multiple first slide rails 5 are arranged around the sleeve 2, and multiple collection parts 6 slide on multiple first slide rails 5. In this embodiment, 8 first slide rails 5 and collection parts 6 are arranged correspondingly, and they are spaced 45 degrees apart from each other, so that during use, one or more collection parts 6 can collect and transport sand and gravel at the same time to ensure the efficiency of sand and gravel collection, quickly fill the sand and gravel lost around the pile foundation 1, and ensure the stability of the pile foundation 1. In order to ensure the stability of the first track, an annular reinforcement rod is connected between the multiple first tracks, so that the multiple first tracks are connected to form a whole.

[0029] Specifically, the anti-scour 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, wherein the first slide rail 5 is connected to the outer wall of the cylindrical cover, the outer wall of the cylindrical cover is arc-shaped, and compared with the square cover, it can greatly reduce the impact of the water flow and disperse the impact force of the water flow, and the surface arc surface of the spherical cover 31 is better than the circumferential arc surface of the cylindrical cover, and can effectively enhance the impact capacity of the entire pile foundation 1. Specifically, the cylindrical cover 32 is connected to the outer wall of the sleeve 2 through a plurality of reinforcing ribs to strengthen the connection between the sleeve 2 and the anti-scour cover 3.

[0030] Specifically, a dumping port 33 is provided on the cylindrical cover 32, and a sliding door group 7 and a second monitoring device (not shown in the figure) are provided at the dumping port 33. When the second monitoring device detects that the collecting part 6 is close to the dumping port 33, the sliding door group 7 will open the dumping port 33 according to the monitoring result of the second monitoring device, so that the collecting part 6 can dump the collected sand and gravel. After the collecting part 6 has dumped the sand and gravel, the collecting part 6 moves away from the anti-scour outer cover 3 along the first slide rail 5. When the second monitoring device detects it, the sliding door group 7 will close the dumping port 33 according to the monitoring result of the second monitoring device, so that the entire anti-scour outer cover 3 is basically closed, thereby preventing the collecting shovel from being washed away from the dumping port 33 due to the opening of the dumping port 33 during the collection process. Specifically, the second monitoring device can be an electromagnetic sensor. The electromagnetic sensor is based on the principle of electromagnetic induction. When a machine made of metal material runs on the first slide rail 5, it will cause changes in the surrounding magnetic field. The electromagnetic sensor can monitor this magnetic field change and thus identify the arrival of the machine. It has a high sensitivity to metal objects and can more accurately monitor the metal machine on the first slide rail 5, and is not directly affected by factors such as seawater salinity.

[0031] 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. The inner wall of the cylindrical cover 32 is provided with a second slide rail, and the second slide 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. The second sliding bracket 71 and the sliding sealing plate 72 are both arranged in a sliding groove, and both slide on the second slide rail through the sliding groove. Among them, the second rotating device can be a motor, which is installed in the installation cavity in 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 provided on the side wall of the second slide rail along its length. The second driving gear is meshed with the second rack for transmission, so that the second rotating device rotates, which can drive the sliding sealing plate 72 to move along the second slide rail, and can close or open the pouring port 33; correspondingly, because the lower end of the cylindrical cover 32 is inserted into the soil, the sliding sealing When the plate 72 slides downward, the lower part of the sliding sealing plate 72 will also be inserted into the soil. Due to the obstruction of the soil, the output of the second rotating device will be increased. Long-term use will cause damage to the sliding door group 7. Therefore, a placement plate 34 is provided on the inner wall of the bottom of the cylindrical cover 32. The placement plate 34 is provided with a placement cavity with an upper opening, and the placement cavity is used to place the sliding sealing plate 72. When the sliding sealing plate 72 slides downward to open the pouring port 33, the lower part of the sliding sealing plate 72 will enter the placement cavity without contacting the soil, thereby making the sliding of the sliding sealing plate 72 smoother and not increasing the output of the second rotating device. Furthermore, 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 pouring port 33, the lower part of the sliding sealing plate 72 is also located in the placement cavity, thereby avoiding the situation where sand, stone and soil enter the placement cavity and affect the downward sliding of the sliding sealing plate 72, thereby ensuring the smoothness of the sliding of the sliding sealing plate 72.

[0032] Specifically, a bearing plate 8 is provided on the outer wall of the lower end of the sleeve 2. The bearing plate 8 and the bottom of the anti-scour cover 3 are at a certain distance. The bearing plate 8 sinks into the soil bottom. The bearing plate 8 covers a certain depth of sand and stone soil, which can enhance the installation strength of the anti-scour device. Moreover, the anti-scour device is installed on the outer side of the pile foundation 1. The bearing plate 8 also plays a bottom support role, making the pile foundation 1 more stable. Moreover, the bearing plate 8 can also prevent the soil below from being lost to a certain extent, ensuring the depth of the soil at the bottom of the fixed pile foundation 1. The upper side wall of the bearing plate 8 forms a bearing cavity with an upper end opening for bearing sand and stone. Compared with the horizontal upper side wall, the bearing plate 8 has a better bearing and supporting effect. In this embodiment, the inner side wall of the bearing cavity is set to a spherical surface.

[0033] The present invention also discloses an operation method of an offshore wind power foundation anti-scour device, comprising: First, the third monitoring device monitors the sand and gravel conditions around the lower end of the sleeve 2, and determines whether to replenish sand and gravel according to the sand and gravel loss situation. If sand and gravel do not need to be replenished, the sand and gravel collection component will not be started, and the collecting part 6 is located at the collection position. According to the monitoring result of the first monitoring device, the steering device 62 makes the collecting port 611 of the collecting part 6 face the direction of the ocean current to collect sand and gravel.

[0034] If it is necessary to replenish sand and gravel, the sand and gravel collection assembly is started. That is, when the sand and gravel are replenished for the first time, the collecting part 6 is directly driven by the first rotating device 641 to move along the first slide rail 5 close to the anti-scour cover 3. The second monitoring device detects that the collecting part 6 is approaching, and the sliding door group 7 opens the dumping port 33. When it reaches the dumping port 33, the dumping drive device 65 works to rotate the dumping plate 612 to dump the sand and gravel. After the dumping is completed, the dumping plate 612 returns to its original position, and the collecting part 6 moves away from the anti-scour cover 3. At the same time, the second monitoring device detects that the collecting part 6 is approaching. The collecting part 6 moves away, the sliding door group 7 closes the dumping port 33, and the collecting part 6 returns to the collecting position along the original route, so that the collecting port 611 of the collecting part 6 faces the direction of the ocean current, and continues to collect sand and gravel. After a certain period of collection (according to the operator's regulations), the sand and gravel are transported to the anti-scour outer cover 3 for dumping until the third monitoring device detects that the sand and gravel around the lower end of the sleeve 2 does not need to be replenished. Then the sand and gravel collecting component stops working, and the collecting part 6 returns to the collecting position to continue collecting. When the collecting part 6 is in the collecting position, the collecting port 611 faces the direction of the ocean current.

[0035] During the process of transporting the collecting part 6 to the anti-scour outer cover 3, the collecting port 611 of the collecting part 6 faces away from the direction of the ocean current, which can prevent the sand and gravel from being lost again during the transportation to a certain extent. After the collecting part 6 dumps the sand and gravel, during the return process, the collecting port 611 of the collecting part 6 faces the direction of the ocean current, collecting while returning, so that more sand and gravel can be collected within a certain period of time.

[0036] Among them, in this embodiment, during the process of sand and stone replenishment, the time of each sand and stone collection (except the first time of stone replenishment in each cycle) is fixed, and the transportation process, dumping process and return process are all fixed, which is a cycle. The cycle time is set according to the needs of the staff.

[0037] Specifically, the operation method also includes: If the third monitoring device detects that the sand and gravel around the lower end of the sleeve 2 need to be replenished, it will drive the collecting parts 6 in each direction to work according to the loss of sand and gravel in each direction, so as to replenish the sand and gravel in each direction of the lower end of the sleeve 2 until the sand and gravel in the corresponding direction are replenished. The collecting parts 6 in the corresponding direction stop working and return to the collection position, so that the stone replenishment process is efficient and rapid.

[0038] The above method makes the amount of stone replenishment in the whole sand and stone cycle larger and more stable, which can extend the required maintenance cycle and make the wind power pile foundation 1 more erosion-resistant.

[0039] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall 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 the length direction thereof, 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 stone condition 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 conditions; 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 has dumped 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 anti-scour device includes a plurality of sand and stone collecting assemblies, 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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