An offshore wind power foundation pre-buried system

Abstract

The present invention relates to the field of offshore wind power foundations, and specifically to an offshore wind power foundation embedded system, comprising an embedded component body, a hoisting unit and the embedded unit, wherein the embedded unit comprises a fixed base arranged at the lower end of the embedded component body, a positioning anchor rod fixed to the seabed is installed on the fixed base, the embedded unit also comprises a support frame body slidably arranged on the embedded component body, a lower bag is provided on the support frame body, and a stabilizing component, the stabilizing component has an upper bag, and a buffer structure is provided between the upper bag and the lower bag. The present invention initially maintains the embedded component body in a vertical state by fixing the fixed base and the seabed through the positioning anchor rod, and with the graded pressure structure of the lower bag and the upper bag on the support frame body, the support frame body is stabilized by the lower bag and further pressurized by the upper bag, thereby ensuring the stability of the embedded component body in the support frame body.

Description

Technical Field

[0001] The present invention relates to the field of offshore wind power foundations, and in particular to an offshore wind power foundation pre-buried system. Background Art

[0002] At present, the common offshore wind turbine support technologies mainly include bottom fixed support and suspended support. The most common one is the bottom fixed support, which fixes the lower foundation of the offshore wind turbine 10-20m below the seabed. However, due to the soft soil of the seabed and the corrosiveness of seawater, it is inevitable that the embedded parts of the foundation will affect the stability of the offshore wind turbine foundation due to soil migration and seawater corrosion, thereby affecting the operation of the wind turbine.

[0003] The currently disclosed Chinese patent CN220565261U discloses a pre-embedded foundation structure for offshore wind power, including an embedded part body, a fixing seat is provided at the lower end of the embedded part body, a fixing mechanism is provided at the lower end of the fixing seat, the fixing mechanism includes a reinforcement base, the reinforcement base is arranged at the lower end of the fixing seat, an adjustment component is arranged between the fixing seat and the reinforcement base, a cavity is opened inside the reinforcement base, the reinforcement ribs are arranged at the lower end of the reinforcement base, connecting steel bars are cross-arranged between the reinforcement ribs, and connecting brackets are arranged on both sides of the reinforcement base, a connecting block is arranged between the connecting brackets, and one side of the connecting block is provided with embedded steel bars.

[0004] According to the above-mentioned patent, the patent uses the fastening and anchoring effect of reinforcing ribs and embedded steel bars through a fixing mechanism to maintain the vertical and horizontal stability of the embedded part body, and uses a compression spring to ensure the downward pressure of the limit block on the reinforced base, thereby maintaining the stability of the reinforced base and preventing the reinforced base from moving upward. However, the patent cannot ensure a continuous pressure state by applying pressure to the reinforced base through the spring. With the passage of time, corrosion and wear, the effective elastic force of the spring weakens and may not be able to maintain the constant pressure set initially, affecting the stability of the reinforced base and the overall structural safety. Therefore, there is a need for an embedded structure that ensures the long-term stability of the offshore wind power foundation while reducing the potential negative impact of environmental factors on it. Summary of the invention

[0005] In view of the problems existing in the prior art, an offshore wind power foundation embedded system is provided. The present invention initially maintains the embedded component body in a vertical state by fixing the base to the seabed through positioning anchor rods. With the graded pressure structure of the lower bag and the upper bag on the support frame, the support frame is stabilized by the lower bag and further pressurized by the upper bag, thereby ensuring the stability of the embedded component body in the support frame.

[0006] In order to solve the problems of the prior art, the present invention provides an embedded system for offshore wind power foundation, comprising an embedded part body, a hoisting unit and an embedded unit, wherein the embedded unit comprises a fixed base arranged at the lower end of the embedded part body, a positioning anchor rod fixed to the seabed is installed on the fixed base, the embedded unit also comprises a support frame slidably arranged on the embedded part body, the support frame is used to further maintain the stability of the embedded part body in the vertical and horizontal directions, a lower bag for filling with concrete is provided on the support frame, and a stabilizing component for keeping the lower bag in a pressure state after the lower bag is filled with concrete, the stabilizing component has an upper bag for exerting pressure on the lower bag after it is filled with concrete, and a buffer structure is provided between the upper bag and the lower bag.

[0007] Preferably, a reinforcement anchor rod fixed to the seabed is installed on the support frame.

[0008] Preferably, the support frame has an inner edge platform and an outer edge platform for fixing the lower layer bag, and a guide space for guiding the pressing direction of the buffer structure is formed between the inner edge platform and the outer edge platform.

[0009] Preferably, the buffer structure is provided with a contact plate movably mounted between the inner edge platform and the outer edge platform, the surface of the contact plate facing the lower bag having a flexible layer in contact therewith, and the contact plate can move along the axial direction of the embedded part body in the guide space.

[0010] Preferably, the buffer structure is also provided with an extrusion plate movably mounted above the abutment plate, the extrusion plate is located below the upper bladder bag, a compression spring is fixedly connected between the extrusion plate and the inner edge platform, and when the extrusion plate is close to the abutment plate, the compression spring is in a compressed state.

[0011] Preferably, a lower rubber strip is provided on the surface of the resistance plate facing the extrusion plate, and an upper rubber strip is provided on the surface of the extrusion plate facing the resistance plate. A rolling portion is provided between the upper and lower rubber strips to prevent direct friction between the two. Both the upper and lower rubber strips have grooves for the rolling portion to be embedded.

[0012] Preferably, the abutment plate has an inner guide surface and an outer guide surface which are in contact with the inner edge platform and the outer edge platform respectively.

[0013] Preferably, the positions on the support frame corresponding to the inner edge platform and the outer edge platform are respectively provided with an inner fixing portion and an outer fixing portion for fixing the upper layer bag, and an extrusion space connected to the guide space is formed between the inner fixing portion and the outer fixing portion.

[0014] Preferably, the support frame is a ring structure coaxially sleeved on the embedded part body, the inner diameter of the support frame is larger than the diameter of the embedded part body, and the upper end of the support frame is uniformly provided with sliding parts in contact with the surface of the embedded part body around its circumference.

[0015] Preferably, the fixed base is also a ring structure coaxially sleeved on the embedded part body, the fixed base is fixedly connected to the embedded part body, the inner diameter of the support frame is equal to the outer diameter of the fixed base, and when the support frame is lowered to the seabed, the support frame is in an installation state sleeved on the fixed base.

[0016] Compared with the prior art, the present application has the following beneficial effects: the present invention initially maintains the embedded component body in a vertical state by fixing the base and the seabed through positioning anchor rods, and with the graded pressure structure of the lower bag and the upper bag on the support frame, the support frame is stabilized by the lower bag and further pressurized by the upper bag, thereby achieving double stabilization of the support frame, thereby ensuring the stability of the embedded component body in the support frame and reducing the impact of wind and wave surges on the embedded component body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of an offshore wind power foundation embedded system.

[0018] Figure 2 It is a partial three-dimensional structural cross-sectional view of an offshore wind power foundation embedded system.

[0019] Figure 3 It is a schematic diagram of the state in which the lower end of the embedded part main body of the offshore wind power foundation embedded system is initially stabilized on the seabed through a fixed base.

[0020] Figure 4 It is a schematic diagram of a state in which the support frame of an offshore wind power foundation embedded system is located at sea level and has not yet been lowered.

[0021] Figure 5 It is a schematic diagram of the state in which the support frame of the offshore wind power foundation embedded system is lowered to the seabed to further stabilize the main body of the embedded parts.

[0022] Figure 6 It is a three-dimensional structural diagram of a support frame, upper and lower bags and stabilizing components of an offshore wind power foundation embedded system.

[0023] Figure 7 The present invention is a plan cross-sectional view of a support frame, upper and lower bags and stabilizing components of an offshore wind power foundation embedded system.

[0024] Figure 8 yes Figure 7 An enlarged schematic diagram of point A.

[0025] Fig. 9 yes Figure 7 An enlarged schematic diagram of point B.

[0026] Fig.10 yes Figure 7Enlarged schematic diagram of point C.

[0027] The numbers in the figure are: 1. embedded part body; 2. fixed base; 21. positioning anchor rod; 3. support frame; 31. lower bag; 311. inner edge platform; 312. outer edge platform; 32. upper bag; 321. inner fixing part; 322. outer fixing part; 33. reinforcement anchor rod; 4. buffer structure; 41. resistance plate; 411. flexible layer; 42. extrusion plate; 421. compression spring; 43. lower rubber strip; 431. rolling part; 44. upper rubber strip; 5. sliding part. DETAILED DESCRIPTION

[0028] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] See also Figure 1-Figure 5 As shown, an offshore wind power foundation embedded system includes an embedded component body 1, a hoisting unit and an embedded unit, wherein the embedded unit includes a fixed base 2 arranged at the lower end of the embedded component body 1, and a positioning anchor rod 21 fixed to the seabed is installed on the fixed base 2. The embedded unit also includes a support frame 3 slidably arranged on the embedded component body 1, and the support frame 3 is used to further maintain the vertical and horizontal stability of the embedded component body 1. The support frame 3 is provided with a lower bag 31 for filling with concrete, and a stabilizing component for keeping the lower bag 31 in a pressure state after being filled with concrete. The stabilizing component has an upper bag 32 that exerts a pressure effect on the lower bag 31 after being filled with concrete, and a buffer structure 4 is provided between the upper bag 32 and the lower bag 31.

[0030] The lower bag 31 and the upper bag 32 are both annular structures surrounding the embedded part body 1. A pit is dug in advance on the seabed for the support frame 3 and the lower end of the embedded part body 1 to be buried therein. The lower bag 31 and the upper bag 32 have filling ports. Through precise measurement and positioning, the embedded part body 1 is first placed in a predetermined position. The fixed base 2 is tightly connected to the seabed through the positioning anchor rod 21 to ensure the stability and verticality of the embedded part body 1. Next, the sliding support frame 3 is installed on the embedded part body 1, and the support frame 3 is lowered to the seabed through the hoisting unit to help the embedded part body 1 maintain a vertical state and ensure stability. The lower bag 31 for concrete filling provided on the support frame 3 is gradually filled with concrete by pumping concrete into the bag until it is fully loaded. As the lower bag 31 is filled with concrete, the stability of the support frame 3 on the seabed is maintained. Since the upper bag 32 is located above the lower bag 31, the pressure is transferred to the buffer structure 4 through its gravity by filling the upper bag 32 with concrete, and the lower bag 31 is indirectly pressurized through the buffer structure 4, which not only avoids direct pressure shock that causes excessive friction between the upper bag 32 and the lower bag 31, but also further maintains the stability of the support frame 3 to the embedded part main body 1.

[0031] See also Figure 1-Figure 5 As shown, a reinforcement anchor rod 33 fixed to the seabed is installed on the support frame 3.

[0032] The reinforcement anchor rods 33 directly connect the support frame 3 firmly to the seabed, and further enhance the stability of the entire wind power foundation on the basis of the positioning anchor rods 21, preventing the displacement of the support frame 3 due to wind and wave surges, water flow or external forces, and ensuring long-term stability. In extreme weather or earthquake conditions, the reinforcement anchor rods 33 can provide strong pull-out resistance to prevent the support frame 3 from being lifted or displaced, thereby protecting the embedded part body 1 from damage.

[0033] See also Figure 6-Figure 10 As shown, the support frame 3 has an inner edge platform 311 and an outer edge platform 312 for fixing the lower layer bag 31 , and a guide space for guiding the pressing direction of the buffer structure 4 is formed between the inner edge platform 311 and the outer edge platform 312 .

[0034] On the support frame 3, a specially made lower bag 31 and upper bag 32 with corrosion resistance are arranged, and the inner edge platform 311 and the outer edge platform 312 are fixedly connected to the lower bag 31, and a guide space for the buffer structure 4 to move is constructed between the inner edge platform 311 and the outer edge platform 312. After the lower bag 31 is filled, the injection process of the upper bag 32 begins, and the concrete is sent into the upper bag 32 through the filling port and gradually filled. At this time, as the filling proceeds, the concrete increases and the pressure rises. The buffer structure 4 is subjected to the pressure of the upper bag 32 and gradually presses the lower bag 31, so that the buffer structure 4 moves along its guiding direction in the guide space, thereby accurately and effectively pressurizing the lower bag 31, avoiding the situation where the lower bag 31 is subjected to uneven force due to excessive deviation in the pressure direction, thereby avoiding direct impact, making the pressure uniform, and finally further stabilizing the support frame 3.

[0035] See also Figure 7-10 As shown, the buffer structure 4 is provided with a contact plate 41 movably installed between the inner edge platform 311 and the outer edge platform 312, and the surface of the contact plate 41 facing the lower layer bag 31 has a flexible layer 411 in contact with it, and the contact plate 41 can move along the axial direction of the embedded part body 1 in the guide space.

[0036] Between the inner edge platform 311 and the outer edge platform 312, a flexible layer 411 arranged on the surface of the movable contact plate 41 is installed directly facing the lower bag 31 to ensure soft contact. After the lower bag 31 is filled with concrete, concrete is sent into the upper bag 32 through the filling port. The pressure of the upper bag 32 on the contact plate 41 gradually increases. The contact plate 41 senses the pressure and moves along the direction of the lower bag 31, transferring the pressure to the lower bag 31. The flexible layer 411 on the contact plate 41 maintains a uniform pressure state, protecting the lower bag 31 from damage.

[0037] See also Figure 7-10 As shown, the buffer structure 4 is also provided with an extrusion plate 42 movably installed above the contact plate 41, and the extrusion plate 42 is located below the upper bladder bag 32. A compression spring 421 is fixedly connected between the extrusion plate 42 and the inner edge platform 311. When the extrusion plate 42 is close to the contact plate 41, the compression spring 421 is in a compressed state.

[0038] When concrete begins to be injected into the upper bladder bag 32, the concrete is fed in through the filling port. As the weight of the upper layer increases, the extrusion plate 42 gradually moves downward and approaches the resistance plate 41. As the extrusion plate 42 moves downward, the compression spring 421 begins to be squeezed and enters a compressed state. A dynamic pressure adjustment zone is formed between the resistance plate 41 and the extrusion plate 42 due to the buffering of the compression spring 421. As the weight of the upper layer increases, the pressure is smoothly and evenly transmitted to the resistance plate 41 through the compression of the compression spring 421 and the extrusion plate 42 until the upper bladder bag 32 is filled, and the pressure on the lower bladder bag 31 is maintained.

[0039] See also Figure 7-10 As shown, a lower rubber strip 43 is provided on the surface of the resistance plate 41 facing the extrusion plate 42, and an upper rubber strip 44 is provided on the surface of the extrusion plate 42 facing the resistance plate 41. A rolling portion 431 is provided between the upper rubber strip 44 and the lower rubber strip 43 to prevent direct friction between the two. Both the upper rubber strip 44 and the lower rubber strip 43 have a groove for the rolling portion 431 to be embedded.

[0040] As the upper bag 32 begins to be filled with concrete, the weight gradually increases, and the extrusion plate 42 is forced to move downward. The upper rubber strip 44 and the lower rubber strip 43 move in the reserved space through the rolling portion 431 instead of direct friction contact, which reduces the wear between them. The rolling portion 431 between the upper rubber strip 44 and the lower rubber strip 43 is embedded in their respective grooves and slides freely with the pressure change, while maintaining the stability between the extrusion plate 42 and the contact plate 41.

[0041] See also Figure 7-10 As shown, the abutment plate 41 has an inner guide surface and an outer guide surface which are in contact with the inner edge platform 311 and the outer edge platform 312 respectively.

[0042] The inner guide surface on the contact plate 41 fits tightly against the inner edge platform 311, and the outer guide surface fits tightly against the outer edge platform 312, ensuring that the vertical position of the contact plate 41 is stable and avoiding displacement. When the upper bladder bag 32 is filled, the force caused by the increase in weight is transmitted downward through the extrusion plate 42 and indirectly transmitted downward through the contact plate 41, so that the contact plate 41 maintains a vertical downward pressure relative to the lower bladder bag 31, so that the force acts vertically and stably on the lower bladder bag 31, avoiding lateral force dispersion or tilting, and improving the stability of the pressure on the lower bladder bag 31.

[0043] See also Figure 7-10 As shown, the positions corresponding to the inner edge platform 311 and the outer edge platform 312 on the support frame 3 are respectively provided with an inner fixing portion 321 and an outer fixing portion 322 for fixing the upper bag 32, and an extrusion space connected to the guide space is formed between the inner fixing portion 321 and the outer fixing portion 322.

[0044] The inner fixing portion 321 and the outer fixing portion 322 provide a stable fixing point for the upper bladder bag 32, ensuring that the position of the upper bladder bag 32 is accurate and not shifted during installation. During the filling process of the upper bladder bag 32, as the weight increases, the contents of the upper bladder bag 32 are squeezed through the guide space, forming a natural downward pressure transmission, thereby ensuring the verticality of the pressure.

[0045] See also Figure 2 , Figure 4 and Figure 5 As shown, the support frame 3 is a ring structure coaxially sleeved on the embedded component body 1, the inner diameter of the support frame 3 is larger than the diameter of the embedded component body 1, and the upper end of the support frame 3 is evenly distributed with sliding parts 5 in contact with the surface of the embedded component body 1 around its circumferential direction.

[0046] The support frame 3 is coaxially aligned with the embedded part body 1, which facilitates installation and ensures accurate positioning of the support frame 3 and the embedded part body 1. When the support frame 3 is lowered from sea level to the seabed, the sliding part 5 at the upper end of the support frame 3 that contacts the embedded part surface maintains an optimal contact state with the embedded part body 1, reducing friction and ensuring the stability of lowering.

[0047] See also Figure 2 , Figure 4 and Figure 5 As shown, the fixed base 2 is also a ring structure coaxially sleeved on the embedded part body 1. The fixed base 2 is fixedly connected to the embedded part body 1. The inner diameter of the support frame 3 is equal to the outer diameter of the fixed base 2. When the support frame 3 is lowered to the seabed, the support frame 3 is in an installation state sleeved on the fixed base 2.

[0048] When the support frame 3 is placed on the seabed, it is aligned with the fixed base 2, and the support frame 3 is easily mounted on the fixed base 2. The precise size matching between the two ensures the stability of the support frame 3, avoids the support frame 3 from shaking relative to the fixed base 2 due to the impact of sea water, and improves stability.

[0049] The present invention initially maintains the embedded component body 1 in a vertical state by fixing the fixed base 2 and the seabed through the positioning anchor rods 21. With the graded pressure structure of the lower bag 31 and the upper bag 32 on the support frame 3, the support frame 3 is stabilized by the lower bag 31 and further pressurized by the upper bag 32, thereby achieving double stabilization of the support frame 3, thereby ensuring the stability of the embedded component body 1 in the support frame 3 and reducing the impact of wind and wave surges on the embedded component body 1.

[0050] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. An offshore wind power foundation embedded system, comprising an embedded component body (1), a hoisting unit and an embedded unit, wherein the embedded unit comprises a fixed base (2) arranged at the lower end of the embedded component body (1), and a positioning anchor rod (21) fixed to the seabed is installed on the fixed base (2); It is characterized in that The embedded unit further comprises a support frame (3) slidably arranged on the embedded component body (1), wherein the support frame (3) is used to further maintain the stability of the embedded component body (1) in the vertical and horizontal directions; The support frame (3) is provided with a lower bag (31) for being filled with concrete, and a stabilizing component for maintaining a pressure state on the lower bag (31) after the lower bag (31) is filled with concrete, the stabilizing component having an upper bag (32) for exerting a pressure effect on the lower bag (31) after the lower bag (31) is filled with concrete, and a buffer structure (4) is provided between the upper bag (32) and the lower bag (31); The support frame (3) is provided with an inner edge platform (311) and an outer edge platform (312) for fixing the lower layer bag (31), and a guide space for guiding the pressing direction of the buffer structure (4) is formed between the inner edge platform (311) and the outer edge platform (312); The buffer structure (4) is provided with a contact plate (41) movably mounted between the inner edge platform (311) and the outer edge platform (312); the surface of the contact plate (41) facing the lower layer bag (31) has a flexible layer (411) in contact with the lower layer bag (31); and the contact plate (41) is capable of moving in the guide space along the axial direction of the embedded component body (1); The buffer structure (4) is further provided with an extrusion plate (42) movably mounted above the abutment plate (41), the extrusion plate (42) being located below the upper bladder bag (32), a compression spring (421) being fixedly connected between the extrusion plate (42) and the inner edge platform (311), and when the extrusion plate (42) is close to the abutment plate (41), the compression spring (421) is in a compressed state; A lower rubber strip (43) is provided on the surface of the abutment plate (41) facing the extrusion plate (42), and an upper rubber strip (44) is provided on the surface of the extrusion plate (42) facing the abutment plate (41). A rolling portion (431) capable of preventing direct friction between the upper rubber strip (44) and the lower rubber strip (43) is provided between the upper rubber strip (44) and the lower rubber strip (43). Both the upper rubber strip (44) and the lower rubber strip (43) have a groove for the rolling portion (431) to be embedded.

2. The offshore wind power foundation pre-buried system according to claim 1, characterized in that: A reinforcement anchor rod (33) fixed to the seabed is installed on the support frame (3).

3. The offshore wind power foundation pre-buried system according to claim 1, characterized in that: The abutment plate (41) is provided with an inner guide surface and an outer guide surface which are in contact with the inner edge platform (311) and the outer edge platform (312), respectively.

4. The offshore wind power foundation pre-buried system according to claim 3, characterized in that: An inner fixing portion (321) and an outer fixing portion (322) for fixing the upper layer bag (32) are respectively provided at positions corresponding to the inner edge platform (311) and the outer edge platform (312) on the support frame (3), and an extrusion space communicating with the guide space is formed between the inner fixing portion (321) and the outer fixing portion (322).

5. The offshore wind power foundation pre-buried system according to claim 4, characterized in that: The support frame (3) is in the form of a ring structure coaxially sleeved on the embedded component body (1); the inner diameter of the support frame (3) is larger than the diameter of the embedded component body (1); and the upper end of the support frame (3) is uniformly provided with sliding portions (5) in contact with the surface of the embedded component body (1) in a circumferential direction thereof.

6. The offshore wind power foundation pre-buried system according to claim 5, characterized in that: The fixed base (2) is also in the form of a ring structure coaxially sleeved on the embedded component body (1); the fixed base (2) is fixedly connected to the embedded component body (1); the inner diameter of the support frame (3) is equal to the outer diameter of the fixed base (2); when the support frame (3) is lowered to the seabed, the support frame (3) is in an installation state sleeved on the fixed base (2).

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