Offshore wind power foundation anti-scouring device and protection method thereof

Abstract

The invention belongs to the field of offshore wind power foundations, and provides an offshore wind power foundation anti-scouring device and a protection method thereof. The anti-scouring device for the offshore wind power foundation comprises a conical sheath, an anchoring mechanism, a buffering structure and a positioning mechanism, and the conical sheath is arranged on the outer wall of a wind power foundation pile in a penetrating mode; the anchoring mechanism comprises a driving part and an anchoring part, the driving part is arranged in the middle of the conical sheath in a sleeving mode, the anchoring part is connected to the bottom of the conical sheath in a penetrating and inserting mode, and the stretching amount of the anchoring part in the vertical direction is controlled by rotating the driving part; the buffering structure is arranged on the outer wall of the conical sheath and the outer wall of the driving part in a surrounding manner so as to be matched with the driving part to perform unloading buffering of seawater scouring force; the multiple sets of positioning mechanisms are arranged between the sleeving positions of the wind power foundation piles of the conical sheath in a surrounding mode so that the wind power foundation piles can be guided to perpendicularly penetrate through the conical sheath in a penetrating mode. It can be ensured that the wind power foundation pile is stably prevented from being scoured.

Description

Technical Field

[0001] The present invention belongs to the field of offshore wind power foundations, and particularly relates to an offshore wind power foundation anti-scouring device and a protection method thereof. Background Art

[0002] The statements in this part only provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] The offshore wind power foundation is the core structure supporting the offshore wind turbine generator, ensuring its stable operation in a complex marine environment. In some shallow sea areas, single-pile foundations are often used. During the use of a single-pile foundation, the area where it penetrates the seabed is continuously scoured and eroded by seawater, resulting in a continuous reduction of the sand and gravel at the seabed of the foundation pile. As a result, the foundation pile is unstable during installation and may skew.

[0004] The existing methods for solving the scour of wind power foundations mostly use the sand filling method, that is, special sand and gravel are filled in the position where the single-pile foundation penetrates the seabed by filling. Such an anti-scouring method is very cumbersome in the configuration of sand and gravel, and it is also difficult to operate during the sand and gravel filling. Summary of the Invention

[0005] In order to solve the technical problems existing in the above background art, the present invention provides an offshore wind power foundation anti-scouring device and a protection method thereof, which can ensure stable anti-scouring of the wind power foundation pile.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] The first aspect of the present invention provides an offshore wind power foundation anti-scouring device.

[0008] An offshore wind power foundation anti-scouring device includes: a conical sheath, an anchoring mechanism, a buffer structure, and a positioning mechanism.

[0009] The conical sheath is sleeved on the outer wall of the wind power foundation pile.

[0010] The anchoring mechanism includes a driving member and an anchor. The driving member is sleeved in the middle of the conical sheath, and the anchor is inserted and connected to the bottom of the conical sheath. The anchor controls the telescopic amount of the anchor in the vertical direction by rotating the driving member.

[0011] The buffer structure is disposed around the outer walls of the conical sheath and the driving member to cooperate with the driving member to buffer the scouring force of seawater.

[0012] Multiple groups of positioning mechanisms are provided and are disposed around the sleeved position of the wind power foundation pile of the conical sheath to guide the wind power foundation pile to vertically penetrate through the conical sheath.

[0013] As an implementation manner, the outer wall of the conical sheath is arc-shaped, with its middle part concave inward and both ends of the top and bottom convex outward, and then it is paired with a conical frustum.

[0014] As an implementation manner, a rotating ring groove is provided on the outer wall of the middle part of the conical sheath; the driving member includes a driving rotating ring. A plurality of insertion grooves are provided at the bottom end of the conical sheath, and the tops of the plurality of insertion grooves are all connected to the rotating ring groove in a penetrating manner. The anchor is inserted into the insertion groove.

[0015] As an implementation manner, the buffering structure includes: a plurality of buffer plates and a plurality of bionic grasses;

[0016] A plurality of buffer plates are fixedly connected to the outer wall of the driving rotating ring in a surrounding manner;

[0017] A plurality of bionic grasses are respectively fixedly connected to the outer walls of the conical sheath and the driving rotating ring, and the bionic grasses are arranged in the intervals adjacent to the plurality of buffer plates.

[0018] As an implementation manner, a plurality of water permeable holes are provided in the middle of the buffer plate, and the water permeable holes are used for the penetration of the scouring seawater.

[0019] As an implementation manner, the anchor includes: an anchor sleeve and an anchor cone;

[0020] The anchor sleeve is rotationally inserted into the insertion groove. A toothed groove end is provided at the top of the anchor sleeve, and the toothed groove end is used to cooperate with the driving rotating ring for rotational driving;

[0021] The top of the anchor cone is inserted and connected to the bottom of the anchor sleeve, and the top of the anchor cone is slidably inserted into the insertion groove.

[0022] As an implementation manner, a plurality of groups of toothed plate areas are provided on the inner ring wall of the driving rotating ring. The teeth of the toothed plate areas are meshed and driven with the toothed groove end. A support groove is provided on the inner wall of the top of the insertion groove. A support ring is sleeved on the outer wall of the bottom of the anchor sleeve, and the support ring is rotationally inserted into the support groove;

[0023] As an implementation manner, a threaded groove is provided at the bottom end of the anchor sleeve, and an external threaded area is provided at the top of the anchor cone. The anchor cone and the anchor sleeve are in threaded cooperation through the external threaded area and the threaded groove. A limiting sliding groove is provided on the inner wall of the bottom of the insertion groove. A limiting sliding block is fixedly connected to the outer wall of the anchor cone, and the limiting sliding block is slidably inserted into the limiting sliding groove.

[0024] As an implementation manner, the positioning mechanism includes: a positioning sleeve and a pressing plate;

[0025] One end of the positioning sleeve is fixedly connected to the inner ring wall of the conical sheath;

[0026] One end of the extrusion plate is inserted and connected to the middle of the positioning sleeve. The other end of the extrusion plate is provided with an extrusion wheel, which is used to closely press and roll the outer wall of the wind power foundation pile. An extrusion bolt is inserted and connected in a threaded manner at the insertion part of the positioning sleeve and the extrusion plate.

[0027] As an implementation manner, an adjustment sliding groove is opened in the middle of the positioning sleeve. One end of the extrusion plate is slidably inserted into the adjustment sliding groove; a blocking sliding groove is opened on the side wall of the adjustment sliding groove, and a blocking sliding block is fixedly connected to the end of the extrusion plate. The blocking sliding block is slidably inserted into the blocking sliding groove.

[0028] The second aspect of the present invention provides a protection method based on the offshore wind power foundation anti-scouring device as described above.

[0029] A protection method based on the offshore wind power foundation anti-scouring device as described above includes:

[0030] First, sleeved the conical sheath on the outer wall of the wind power foundation pile, adjust the positioning mechanism so that the conical sheath is vertically inserted and sleeved with the wind power foundation pile, and at the same time rotate the anchoring mechanism so that the bottom of the anchor is exposed at the bottom end of the conical sheath;

[0031] Lower the wind power foundation pile installed with the offshore wind power foundation anti-scouring device to the installation position in the sea area. At this time, the part of the anchoring mechanism exposed at the bottom end of the conical sheath is inserted into the seabed at the installation position;

[0032] Rotate the anchoring mechanism clockwise so that the bottom of the anchoring mechanism is further inserted into the seabed;

[0033] When the seawater impacts the protection device, the buffer structure undertakes the scouring force, the buffer mechanism blocks the sand and gravel at the seabed, and the impact force of the sand and gravel is transmitted to the anchoring mechanism to make it rotate, so as to further adjust the insertion balance of the anchoring mechanism and the seabed.

[0034] The beneficial effects of the present invention are:

[0035] (1) The present invention first sets a conical sheath. When installing the wind power foundation pile, the conical sheath is sleeved at the connection between the wind power foundation pile and the seabed. Then, with the setting of the buffer structure, when the seawater impacts the connection between the wind power foundation pile and the seabed, the conical sheath and the buffer structure can buffer and offset the impact force of the seawater. At the same time, the buffer structure is used to block the sand and gravel at the connection between the seabed and the wind power foundation pile, so as to ensure the stability of the connection of the wind power foundation pile at the seabed and be able to resist and reduce the impact of the seawater.

[0036] (2) The present invention also provides an anchoring mechanism at the conical sheath. The driving member of the anchoring mechanism is combined with the buffer structure. When the buffer structure is impacted by seawater, the impact force will be transmitted to the driving member. At this time, the driving member will drive the anchor to adjust its telescopic length, so as to further ensure the stability of the connection between the conical sheath and the seabed, enabling the conical sheath and the buffer mechanism to be stably maintained at the connection between the wind power foundation pile and the seabed, and ensuring stable anti-scouring for the wind power foundation pile.

[0037] Advantages of additional aspects of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings forming a part of this specification are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0039] Figure 1 It is a schematic structural connection diagram of the wind power foundation pile and the anti-scouring device of the present invention.

[0040] Figure 2 It is a front view of the structural connection of the wind power foundation pile and the anti-scouring device of the present invention.

[0041] Figure 3 It is a schematic diagram of the overall structure of the anti-scouring device of the present invention.

[0042] Figure 4 It is a top view of the overall structure of the anti-scouring device of the present invention.

[0043] Figure 5 It is a bottom view of the overall structure of the anti-scouring device of the present invention.

[0044] Figure 6 It is a schematic diagram of the structure of the anchoring mechanism of the present invention.

[0045] Figure 7 It is a top view of the structure of the anchoring mechanism of the present invention.

[0046] Figure 8 It is a bottom view of the structure of the anchoring mechanism of the present invention.

[0047] Figure 9 It is a cross-sectional view of the structure at the connection between the anchoring mechanism and the conical sheath of the present invention.

[0048] Figure 10 It is a schematic diagram of the structure of the positioning mechanism of the present invention.

[0049] Figure 11 It is a top cross-sectional view of the structure of the positioning mechanism of the present invention.

[0050] In the figure: 1, wind power foundation pile; 2, conical sheath; 3, driving swivel; 301, toothed plate area; 4, buffer plate; 401, water-permeable holes; 5, bionic grass; 6, anchoring sleeve; 601, support ring; 602, tooth groove end; 603, thread groove; 7, anchoring cone; 701, limiting slider; 702, external thread area; 8, positioning sleeve; 801, extrusion bolt; 802, adjustment chute; 803, blocking chute; 9, extrusion plate; 901, extrusion wheel; 902, blocking slider. Specific embodiments

[0051] The present invention will be further described below in conjunction with the drawings and embodiments.

[0052] It should be noted that the following detailed description is illustrative and is intended to provide further explanations of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0053] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments of the present invention. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0054] In the present invention, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only relationship terms determined for the convenience of describing the structural relationship of each component or element of the present invention and do not specifically refer to any component or element of the present invention. It should not be construed as a limitation of the present invention.

[0055] In the present invention, terms such as "fixed connection", "connected", "connected" should be understood in a broad sense, indicating that it can be a fixed connection, an integral connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate medium. For those related scientific research or technical personnel in the field, the specific meanings of the above terms in the present invention can be determined according to specific circumstances and should not be construed as a limitation of the present invention.

[0056] In one or more embodiments, as Figures 1-5 shown, a scour prevention device for an offshore wind power foundation is provided, including: a conical sheath 2, an anchoring mechanism, a buffer structure, and a positioning mechanism.

[0057] The conical sheath 2 is sleeved on the outer wall of the wind power foundation pile 1.

[0058] AsFigures 6-9 As shown, the anchoring mechanism includes a driving member and an anchor member. The driving member is sleeved in the middle of the conical sheath, and the anchor member is inserted and connected to the bottom of the conical sheath 2. The anchor member controls the expansion and contraction amount of the anchor member in the vertical direction by rotating the driving member;

[0059] The buffer structure is disposed around the outer walls of the conical sheath 2 and the driving member to cooperate with the driving member to relieve and buffer the seawater scouring force;

[0060] Multiple groups of positioning mechanisms are provided and are disposed around the sleeved portions of the wind power foundation pile 4 of the conical sheath 2 to guide the wind power foundation pile 1 to vertically penetrate through the conical sheath 2.

[0061] In this embodiment, the outer wall of the conical sheath 2 is arc-shaped, with its middle part concave inward and the two ends of the top and bottom convex outward, and then it is matched with a conical frustum. Such a structural setting enables the impact force to be guided from bottom to top when the seawater impacts the conical sheath 2, thereby performing arc-shaped buffer force relief.

[0062] In this embodiment, a rotating ring groove is provided on the outer wall of the middle part of the conical sheath 2; the driving member includes a driving rotating ring 3. A plurality of insertion grooves are provided at the bottom end of the conical sheath 2, and the tops of the plurality of insertion grooves are all connected to the rotating ring groove in a penetrating manner. The anchor member is inserted and connected in the insertion grooves.

[0063] It should be noted that the outer wall of the driving rotating ring 3 conforms to the arc-shaped design of the outer wall of the conical sheath 2, and the overall shape of the driving rotating ring 3 is conical, and it needs to fit in the rotating ring groove for rotation.

[0064] Specifically, the buffer structure includes: a plurality of buffer plates 4 and a plurality of bionic grasses 5;

[0065] A plurality of buffer plates 4 are fixedly connected to the outer wall of the driving rotating ring 3 in a surrounding manner;

[0066] A plurality of bionic grasses 5 are respectively fixedly connected to the outer walls of the conical sheath 2 and the driving rotating ring 3, and the bionic grasses 5 are disposed in the intervals adjacent to the plurality of buffer plates 4.

[0067] The buffer plates 4 in this embodiment are arranged to form a surrounding shield on the outer walls of the conical sheath 2 and the driving rotating ring 3. In this way, when the device is impacted by seawater, the buffer plates 4 first receive the impact to protect the structures of the conical sheath 2 and the driving rotating ring 3, and at the same time block the water body and sand and gravel at the connection between the wind power foundation pile 1, the conical sheath 2 and the seabed to prevent them from flowing away after being scoured by seawater. In the design of this solution, bionic grasses 5 are arranged at the gaps of the buffer plates 4. With the flexible protection setting of the bionic grasses 5, they can further block the seabed sand and gravel and avoid the destruction of the marine water ecosystem.

[0068] The middle part of the buffer plate 4 is provided with a plurality of water-permeable holes, and the water-permeable holes 401 are used for the penetration of flushing seawater. The water-permeable holes 401 are provided at the buffer plate 4, so that the impacting seawater can penetrate the buffer plate 4, thereby preventing the buffer plate 4 from being directly impacted by the seawater, protecting the entire flushing structure, and at the same time, the water-permeable buffer plate 4 also reduces the damage to the flow of the ocean water body to the greatest extent.

[0069] Specifically, the anchoring member comprises: an anchoring sleeve 6 and an anchoring cone 7;

[0070] The anchor sleeve 6 is rotatably inserted into the through-slot, and a toothed end 602 is provided on the top of the anchor sleeve 6, and the toothed end 602 is used to cooperate with the driving ring 3 for rotational driving;

[0071] The top of the anchoring cone 7 is inserted and connected with the bottom of the anchoring sleeve 6, and the top of the anchoring cone 7 is slidably inserted and connected in the through-slot.

[0072] It should be noted that the top of the anchor sleeve 6 is a sealing structure, which ensures the structural strength of the top tube body of the anchor sleeve 6 and enables it to better cooperate with the driving swivel 3 through the toothed end 602.

[0073] In this embodiment, the inner ring wall of the driving rotating ring 3 is provided with multiple groups of tooth plate areas 301, the teeth of the tooth plate area 301 are meshed with the tooth groove end 602 for transmission, the inner wall of the top of the through-slot is provided with a support groove, and the bottom outer wall of the anchor sleeve 6 is provided with a support ring 601, which is rotatably inserted and connected in the support groove;

[0074] A thread groove 603 is provided at the bottom end of the anchoring sleeve 6, and an external thread area 702 is provided at the top of the anchoring cone 7. The anchoring cone 7 and the anchoring sleeve 6 cooperate with each other through the external thread area 702 and the thread groove 603. A limiting slide groove is provided on the inner wall at the bottom of the through-slot hole. A limiting slider 701 is fixedly connected to the outer wall of the anchoring cone 7, and the limiting slider 701 is slidably inserted into the limiting slide groove.

[0075] It should be noted that, through the mutual engagement between the tooth plate area 301 and the tooth groove end 602, when the driving ring 3 rotates, the tooth plate area 301 rotates synchronously, thereby engaging and transmitting with the tooth groove end 602, and then the tooth groove end 602 is driven by the rotation of the driving ring 3 to rotate the anchor sleeve 6, and the cooperation between the support ring 601 and the support groove allows the anchor sleeve 6 to be restricted in rotation within the through-slot slot, thereby ensuring that the tooth plate area 301 and the tooth groove end 602 form a stable engagement.

[0076] A thread groove 603 is provided at the bottom end of the anchor sleeve 6, and an external thread area 702 is provided at the top of the anchor cone 7. The anchor cone 7 and the anchor sleeve 6 are threadedly matched through the external thread area 702 and the thread groove 603. A limiting slide groove is provided on the inner wall at the bottom of the through-slot hole. A limiting slider 701 is fixedly connected to the outer wall of the anchor cone 7, and the limiting slider 701 is slidably inserted and connected in the limiting slide groove.

[0077] It should be noted that the top of the anchoring cone 7 forms a threaded fit with the thread groove 603 of the anchoring sleeve 6 through the external threaded area 702, and at the same time, the limiting slide groove cooperates with the limiting slider 701, so that when the anchoring sleeve 6 rotates, the anchoring cone 7 moves in the vertical direction under the threaded fit, so that the insertion depth of the anchoring cone 7 can be adjusted. In this way, the direction of the seawater scouring force is set, so that the rotation direction of the driving swivel 3 is conducive to moving the anchoring sleeve 6 to push the anchoring cone 7 outward to expose it.

[0078] The structural cooperation between the limiting slide groove and the limiting slider 701 is to prevent the anchoring cone 7 from rotating along with the anchoring sleeve 6, and to ensure that the anchoring cone 7 can stably move in the vertical direction under the cooperation of the thread.

[0079] Specifically, Figures 10-11 As shown, the positioning mechanism includes: a positioning sleeve 8 and an extrusion plate 9;

[0080] One end of the positioning sleeve 8 is fixedly connected to the inner ring wall of the conical sleeve 2;

[0081] One end of the extrusion plate 9 is inserted and connected with the middle part of the positioning sleeve 8, and the other end of the extrusion plate is provided with an extrusion wheel, which is used to closely adhere to the outer wall of the rolled wind power foundation pile 1, and the insertion part of the positioning sleeve 8 and the extrusion plate is threadedly inserted and connected with an extrusion bolt 801.

[0082] It should be noted that the exposed length of the extrusion plate 9 is adjusted by the positioning sleeve 8, and then the extrusion bolt 801 is used for extrusion positioning, so that the extrusion plate 9 can be close to the outer wall of the wind power foundation pile 1. At the same time, the extrusion plate 9 is a "Y"-shaped structure, and its long handle structure is interspersed with the positioning sleeve 8, and the extrusion wheel 901 is arranged at the end of the angle. The close-fitting extrusion wheel 901 ensures that the conical sleeve 2 can rotate horizontally after being mounted on the wind power foundation pile 1. Therefore, by adjusting the setting direction of the conical sleeve 2, the setting direction of the buffer structure can be adjusted, so as to make the best adjustment for the impact direction of seawater.

[0083] An adjusting groove 802 is provided in the middle of the positioning sleeve 8, and one end of the extrusion plate 9 is slidably inserted and connected in the adjusting groove 802; a blocking groove 803 is provided on the side wall of the adjusting groove 802, and a blocking slider 902 is fixedly connected to the end of the extrusion plate, and the blocking slider 902 is slidably inserted and connected in the blocking groove 803.

[0084] It should be noted that through the structural cooperation of the blocking chute 803 and the blocking slider 902, the pressing plate 9 can only slide along the opening direction of the adjusting chute 802, so as to ensure the stability of the insertion and adjustment of the positioning sleeve 8 and the pressing plate 9.

[0085] In another embodiment, a protection method based on the above-mentioned offshore wind power foundation anti-scouring device is also provided, including:

[0086] Step 1: First, sleeved the conical sheath 2 on the outer wall of the wind power foundation pile 1, adjust the positioning mechanism so that the conical sheath 2 is vertically inserted and sleeved with the wind power foundation pile 1, and at the same time rotate the anchoring mechanism so that the bottom of the anchor is exposed at the bottom end of the conical sheath 2.

[0087] Specifically, to adjust the positioning mechanism, first loosen the pressing bolt 801 counterclockwise so that the end of the pressing bolt 801 no longer presses the pressing plate 9. At this time, pull the pressing plate 9 so that the pressing wheel 901 approaches the center line of the conical sheath 2. After all the pressing plates 9 are adjusted, a circular space is formed by surrounding of multiple pressing wheels 901, so as to use multiple pressing wheels 901 to closely press against the outer wall of the wind power foundation pile 1, and then limit the wind power foundation pile 1 by surrounding and pressing it with multiple pressing wheels 901.

[0088] Step 2: Lower the wind power foundation pile installed with the offshore wind power foundation anti-scouring device to the installation position in the sea area. At this time, the part of the anchoring mechanism exposed at the bottom end of the conical sheath 2 is inserted into the seabed at the installation position.

[0089] Specifically, when the conical sheath 2 follows the wind power foundation pile 1 and is lowered in the sea area, the bottom of the anchoring cone 7 is downward and follows the wind power foundation pile 1 to penetrate into the seabed. In the actual construction process, the conical sheath 2 can also be pressed down to ensure the stable insertion and anchoring of the anchoring cone 7 and the seabed.

[0090] Step 3: Rotate the anchoring mechanism clockwise so that the bottom of the anchoring mechanism is further inserted into the seabed.

[0091] Specifically, rotate the driving rotating ring 3 so that the tooth plate area 301 drives the anchoring sleeve 6 to rotate through the meshing transmission with the tooth groove end 602, and then the anchoring cone 7 moves downward by the thread fit, further making the anchoring cone 7 penetrate downward into the seabed.

[0092] Step 4: When the seawater impacts the protection device, the buffer structure undertakes the scouring force, the buffer mechanism blocks the sand and gravel at the seabed, and the impact force of the sand and gravel is transmitted to the anchoring mechanism to make it rotate, so as to further adjust the insertion balance of the anchoring mechanism and the seabed.

[0093] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An anti-erosion device for an offshore wind power foundation, characterized in that, Comprising: A conical sheath, an anchoring mechanism, a buffering structure and a positioning mechanism, The conical sheath is sleeved on the outer wall of the wind power foundation pile; The anchoring mechanism includes a driving member and an anchor. The driving member is sleeved in the middle of the conical sheath, and the anchor is inserted and connected to the bottom of the conical sheath. The anchor controls the telescopic amount of the anchor in the vertical direction by rotating the driving member; The buffering structure is arranged around the outer walls of the conical sheath and the driving member to cooperate with the driving member to buffer the unloading of the seawater scouring force; Multiple groups of the positioning mechanisms are provided and are arranged around the sleeved parts of the wind power foundation pile of the conical sheath to guide the wind power foundation pile to vertically penetrate through the conical sheath.

2. The offshore wind power foundation anti-erosion device according to claim 1, characterized in that The outer wall of the conical sheath is arc-shaped, with its middle part concave inward and the two ends of the top and bottom convex outward, and then is matched with a conical frustum.

3. The offshore wind power foundation anti-erosion device according to claim 1, characterized in that, A rotating ring groove is formed in the outer wall of the middle part of the conical sheath; the driving member includes a driving rotating ring. A plurality of insertion grooves are formed at the bottom end of the conical sheath, and the tops of the plurality of insertion grooves are all connected to the rotating ring groove in a penetrating manner. The anchor is inserted and connected in the insertion grooves.

4. The offshore wind power foundation erosion prevention device according to claim 3, wherein, The buffering structure includes: a plurality of buffer plates and a plurality of bionic grasses; The plurality of buffer plates are fixedly connected to the outer wall of the driving rotating ring in a surrounding manner; The plurality of bionic grasses are respectively fixedly connected to the outer walls of the conical sheath and the driving rotating ring, and the bionic grasses are arranged in the intervals adjacent to the plurality of buffer plates.

5. The offshore wind power foundation anti-erosion device according to claim 4, characterized in that, A plurality of water-permeable holes are formed in the middle of the buffer plate, and the water-permeable holes are used for the penetration of the scouring seawater.

6. The anti-scouring device for an offshore wind power foundation according to claim 3, wherein The anchor includes: an anchoring sleeve and an anchoring cone; The anchoring sleeve is rotatably inserted and connected in the insertion groove, and a toothed groove end is arranged at the top of the anchoring sleeve, and the toothed groove end is used for cooperating with the driving rotating ring for rotational driving; The top of the anchoring cone is inserted and connected to the bottom of the anchoring sleeve, and the top of the anchoring cone is slidably inserted and connected in the insertion groove.

7. The offshore wind power foundation scour prevention device according to claim 6, characterized in that, A plurality of toothed plate areas are arranged on the inner ring wall of the driving rotating ring, and the teeth of the toothed plate areas are meshed and driven with the toothed groove end. A support groove is formed in the inner wall of the top of the insertion groove, and a support ring is sleeved on the outer wall of the bottom of the anchoring sleeve, and the support ring is rotatably inserted and connected in the support groove; Or / and a threaded groove is formed at the bottom end of the anchoring sleeve, an external thread area is formed at the top of the anchoring cone, and the anchoring cone and the anchoring sleeve are in threaded cooperation through the external thread area and the threaded groove. A limiting sliding groove is formed in the inner wall of the bottom of the insertion groove, and a limiting sliding block is fixedly connected to the outer wall of the anchoring cone, and the limiting sliding block is slidably inserted and connected in the limiting sliding groove.

8. The anti-erosion device for an offshore wind power foundation according to claim 1, wherein The positioning mechanism includes: a positioning sleeve and a pressing plate; One end of the positioning sleeve is fixedly connected to the inner ring wall of the conical sheath; One end of the pressing plate is inserted and connected to the middle of the positioning sleeve, and an extrusion wheel is arranged at the other end of the pressing plate, and the extrusion wheel is used for tightly pressing and rolling the outer wall of the wind power foundation pile. A pressing bolt is threadedly inserted at the insertion part of the positioning sleeve and the pressing plate.

9. The offshore wind power foundation scour prevention device according to claim 8, characterized in that, An adjusting sliding groove is formed in the middle of the positioning sleeve, and one end of the pressing plate is slidably inserted and connected in the adjusting sliding groove; a blocking sliding groove is formed in the side wall of the adjusting sliding groove, and a blocking sliding block is fixedly connected to the end of the pressing plate, and the blocking sliding block is slidably inserted and connected in the blocking sliding groove.

10. A protection method based on the offshore wind power foundation anti-scouring device according to any one of claims 1-9, characterized in that, Comprising: First, sleeved the conical sheath on the outer wall of the wind power foundation pile, adjust the positioning mechanism to make the conical sheath vertically inserted and sleeved with the wind power foundation pile. At the same time, rotate the anchoring mechanism so that the bottom of the anchor is exposed at the bottom end of the conical sheath; Lower the wind power foundation pile with the installed offshore wind power foundation scour protection device to the installation position in the sea area. At this time, the part of the anchoring mechanism exposed at the bottom end of the conical sheath is inserted into the seabed at the installation position; Rotate the anchoring mechanism clockwise so that the bottom of the anchoring mechanism is further inserted into the seabed; When the seawater impacts the protection device, the buffer structure undertakes the scouring force, and the buffer mechanism blocks the sand and gravel at the seabed. Moreover, the impact force of the sand and gravel is transmitted to the anchoring mechanism to make it rotate, so as to further adjust the insertion balance between the anchoring mechanism and the seabed.

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