Bending limiter protection device for single-pile fan foundation
By designing a bending limiter protection device including fixtures, support members and cantilever structures on a single pile fan, the problem of bending limiter swing outside the plane under the action of wave flow is solved, and effective protection of bending limiter is achieved to ensure the safety of submarine cables and the normal operation of the fan.
Patent Information
- Application Number
- CN202421967103.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-08-14
AI Technical Summary
In the design of single pile fan foundation, the bending limiter is prone to oscillation outside the plane under the action of wave flow, resulting in bending damage or frequent friction damage, which in turn endangeres the safety of submarine cables.
A bending limiter protection device including a fixing member, a support member and a cantilever structure is designed. The fixing member is provided outside the single pile fan foundation, the support member is inserted below the seabed surface, and the cantilever structure forms a limit space to limit the swing of the bending limiter.
It effectively limits the out-of-plane swing of the bending limiter, prevents bending damage and frequent friction, ensures the safety and stability of the submarine cable, and avoids the situation where the fan cannot transmit power due to damage to the submarine cable.
Smart Images
Figure CN222936055U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of offshore wind power, in particular to a bending limiter protection device for a monopile wind turbine foundation. Background Art
[0002] Submarine cables are a key component of offshore wind farms, responsible for transmitting electrical energy from offshore facilities to land. The safety of submarine cables is crucial for the normal operation of wind farms. An offshore wind power bending limiter is a device specifically used to protect submarine cables, and its main function is to prevent submarine cables from being damaged due to excessive bending.
[0003] In the design of monopile foundations, due to the requirement of the bending radius of the bending limiter itself, the opening for the submarine cable to enter the monopile must be higher than the mud surface (generally more than 2m higher), which will result in a certain suspended height and suspended length of the bending limiter after installation, presenting a catenary shape as a whole. During the actual operation of the wind turbine, in some wind power projects, due to the failure of the anti-scour protection scheme, large scour pits appear around the monopile foundation, resulting in a further increase in the suspended height and suspended length of the bending limiter. At this time, the bending limiter will swing significantly under the action of waves and currents. The bending limiter scheme adopts a split H-type design, which has strong bending resistance in the plane, but weak resistance to out-of-plane swing. If the out-of-plane swing of the bending limiter is not restricted, two consequences may occur: the bending limiter undergoes excessive bending out of the plane, resulting in over-limit stress and damage; the bending limiter will frequently rub against the seabed surface at the mud entry point, causing wear and damage to the bending limiter. Once the bending limiter, as a protection barrier for submarine cables, is damaged, the submarine cable will be damaged quickly. The repair of submarine cables not only has high maintenance costs but also causes significant losses in the power generation of the wind farm. Therefore, there is an urgent need for a protection device that can restrict the out-of-plane swing of the bending limiter. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a bending limiter protection device for a monopile wind turbine foundation to restrict the out-of-plane swing of the bending limiter of the monopile wind turbine foundation and prevent the bending limiter from being damaged due to excessive bending.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] The utility model provides a bending limiter protection device for a monopile wind turbine foundation, including:
[0007] A fixing member for being arranged on the outer side of the monopile wind turbine foundation;
[0008] A supporting member, one end of which is connected to the bottom of the fixing member, and the other end is for being inserted below the seabed surface; and
[0009] The cantilever structure includes two cantilevers spaced apart on the fixing member. One end of each cantilever is connected to the fixing member, and the other end of each cantilever extends away from the fixing member and is inclined upward. A limiting space for restricting the swinging of the bending limiter is formed between the two cantilevers.
[0010] In some embodiments, the fixing member is annular and is used to sleeved on the outer peripheral side of the monopile wind turbine foundation. An accommodation cavity is provided inside the fixing member, and a water inlet hole communicating with the accommodation cavity is opened on the side wall of the fixing member.
[0011] In some embodiments, there are multiple fixing members, and the multiple fixing members are spaced apart along the axial direction of the fixing member. A connecting column is connected between two adjacent fixing members. The cantilever structure is provided on each fixing member, and the support member is connected to one of the fixing members.
[0012] In some embodiments, the inside of the connecting column is hollow and communicates with the accommodation cavities of the respective fixing members. The water inlet hole is opened on the side wall of the upper fixing member.
[0013] In some embodiments, the bending limiter protection device further includes a first connecting rod, and the first connecting rod is connected between two adjacent cantilever structures.
[0014] In some embodiments, a buffer pad is provided on the side of the cantilever facing the limiting space.
[0015] In some embodiments, the cantilever structure further includes a second connecting rod, and the second connecting rod is connected between the two cantilevers.
[0016] In some embodiments, the bending limiter protection device further includes a stiffening plate. One side of the stiffening plate is connected to the cantilever, and the other side is connected to the fixing member.
[0017] In some embodiments, the end of the support member for inserting into the seabed surface has a pointed end.
[0018] In some embodiments, the bending limiter protection device further includes a limiting member. The top of the limiting member abuts against the fixing member, and the side wall of the limiting member is used to connect to the monopile wind turbine foundation.
[0019] Compared with the prior art, the beneficial effects of the bending limiter protection device for a monopile wind turbine foundation according to the embodiments of the present invention are as follows:
[0020] The bending limiter protection device for a single-pile wind turbine foundation according to an embodiment of the present utility model includes a fixing member, a supporting member, and a cantilever structure. The fixing member is configured to be disposed outside the single-pile wind turbine foundation. One end of the supporting member is connected to the bottom of the fixing member, and the other end is configured to be inserted below the seabed surface to provide a supporting and fixing effect for the fixing member, so that the fixing member is stabilized outside the single-pile wind turbine foundation. A limiting space for restricting the swinging of the bending limiter is formed between the intervals of the two cantilevers of the cantilever structure. During use, the supporting member is inserted below the seabed surface to ensure the stability of the fixing member, and the bending limiter is placed in the limiting space of the cantilever structure. When the bending limiter swings out of plane under the action of waves and currents, during the swinging process of the bending limiter, both sides are respectively blocked by the two cantilevers, so that the two cantilevers form a constraint on the out-of-plane swinging of the bending limiter, preventing excessive swinging from causing over-bending failure of the bending limiter, thereby effectively protecting the submarine cable and ensuring the safety and stability of the submarine cable during the operation of the wind turbine, and avoiding the situation that the wind turbine cannot be powered due to damage to the submarine cable during operation. Description of the Drawings
[0021] Figure 1 is a schematic diagram of the bending limiter protection device for a single-pile wind turbine foundation according to an embodiment of the present application;
[0022] Figure 2 is Figure 1 an enlarged schematic diagram of A in
[0023] Figure 3 is a schematic connection diagram of the fixing member and the cantilever structure on the upper side in an embodiment of the present application;
[0024] Figure 4 is a schematic connection diagram of the fixing member and the cantilever structure on the lower side in an embodiment of the present application.
[0025] Reference numerals in the figure:
[0026] 1, fixing member; 11, water inlet hole; 2, supporting member; 21, pointed end; 3, cantilever structure; 31, cantilever; 311, limiting space; 312, buffer pad; 32, second connecting rod; 4, connecting column; 5, first connecting rod; 6, stiffening plate; 7, limiting member;
[0027] 100, single-pile wind turbine foundation; 200, bending limiter; 300, seabed surface. Detailed Embodiments
[0028] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.
[0029] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0030] The following will further describe in detail the specific implementation manners of the present utility model in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.
[0031] Refer to Figures 1 - 4 As shown, an embodiment of the present utility model provides a bending limiter protection device for a single-pile wind turbine foundation, including a fixing member 1, a supporting member 2, and a cantilever structure 3. The fixing member 1 is used to be arranged on the outer side of the single-pile wind turbine foundation 100; one end of the supporting member 2 is connected to the bottom of the fixing member 1, and the other end of the supporting member 2 is used to be inserted below the seabed surface 300; the cantilever structure 3 includes two cantilevers 31 arranged at intervals on the fixing member 1. One end of the cantilever 31 is connected to the fixing member 1, and the other end of the cantilever 31 extends away from the fixing member 1 and is inclined upward; the interval between the two cantilevers 31 forms a limiting space 311 for restricting the swing of the bending limiter 200. Wherein, the swing direction of the bending limiter 200 is Figure 3 the direction indicated by the arrow in
[0032] During use, the support member 2 is inserted below the seabed surface 300 to ensure the stability of the fixing member 1, and the bending limiter 200 is placed in the limiting space 311 of the cantilever structure 3. When the bending limiter 200 swings out of plane under the action of waves and currents, during the swinging process of the bending limiter 200, both sides are respectively blocked and limited by the two cantilevers 31, so that the two cantilevers 31 form a constraint on the swinging of the bending limiter 200, preventing excessive swinging from causing over-bending failure of the bending limiter 200, thereby effectively protecting the submarine cable and ensuring the safety and stability of the submarine cable during the operation of the wind turbine, and avoiding the situation where the wind turbine cannot be powered due to damage to the submarine cable during operation.
[0033] Refer to Figures 1 - 4 As shown, in some embodiments, the fixing member 1 is annular, and the fixing member 1 is used to be sleeved on the outer peripheral side of the monopile wind turbine foundation 100. The monopile wind turbine foundation 100 can form a circumferential limit on the fixing member 1, avoiding the fixing member 1 from being greatly offset axially along the monopile wind turbine foundation 100 under the action of strong winds and waves, resulting in the bending limiter 200 not being able to be placed in the limiting space 311 formed by the cantilever structure 3. An accommodation cavity is provided inside the fixing member 1, and a water inlet hole 11 communicating with the accommodation cavity is provided on the side wall of the fixing member 1. During the installation process, seawater can enter the fixing member 1 through the water inlet hole 11 to increase the self-weight of the fixing member 1 and ensure that it sinks to the design elevation. In this embodiment, the fixing member 1 is a rectangular pipe.
[0034] Refer to Figures 1 - 4 As shown, in some embodiments, there are multiple fixing members 1, and the multiple fixing members 1 are arranged at intervals along the axial direction of the fixing member 1. A connecting column 4 is connected between two adjacent fixing members 1, and each fixing member 1 is connected into a whole through the connecting column 4. Each fixing member 1 is provided with a cantilever structure 3. Multiple limiting spaces 311 are provided for the bending limiter 200 through the multiple cantilever structures 3. The multiple cantilever structures 3 are arranged at intervals along the extending direction of the bending limiter 200, providing multiple limiting points for the suspended part of the bending limiter 200 and improving the limiting effect on the out-of-plane swinging of the bending limiter 200. The bending limiter 200 protection device further includes a first connecting rod 5, and the first connecting rod 5 is connected between two adjacent cantilever structures 3. The first connecting rod 5 plays a role in connecting the cantilever structures 3 and ensuring the stability of the cantilever structures 3. The support member 2 is connected to one of the fixing members 1, and the support member 2 is inserted below the seabed surface 300 to stably support each fixing member 1 and improve the stability of the entire protection device. In some embodiments, one end of the support member 2 for being inserted into the seabed surface 300 has a pointed end 21, which is convenient for the support member 2 to penetrate deeper below the seabed surface 300. The depth of the support member 2 inserted into the seabed surface 300 is 3m to 5m, increasing the stability of the protection device and preventing adverse situations such as floating or torsion under the action of waves and currents.
[0035] In some embodiments, the inside of the connecting column 4 is hollow and communicates with the accommodating cavities of the fixing members 1. The water inlet hole 11 is opened on the side wall of the upper fixing member 1. Water is injected into the upper fixing member 1 through the water inlet hole 11, and the water flows through the connecting column 4 and into the lower fixing members 1, so that the fixing members 1 and the connecting column 4 are all filled with water, further increasing the weight of the overall connection of the fixing members 1 and the connecting column 4 and improving the stability of the overall connection of the fixing members 1 and the connecting column 4. In this embodiment, two fixing members 1 are provided, and both fixing members 1 are annular. They are sleeved on the outer peripheral side of the monopile wind turbine foundation 100 at intervals along the axial direction of the monopile wind turbine foundation 100 and are coaxially arranged with the monopile wind turbine foundation 100. Accommodating cavities are provided inside the fixing members 1. A plurality of connecting columns 4 are fixed between the two fixing members 1, and the connecting columns 4 are arranged at intervals along the circumferential direction of the fixing members 1. The connecting columns 4 communicate the accommodating cavities inside the two fixing members 1, and the water inlet hole 11 is opened on the side wall of the upper fixing member 1. A plurality of supporting members 2 are provided, and the plurality of supporting members 2 are arranged at intervals along the circumferential direction of the fixing members 1 to provide balanced support for the fixing members 1. In this embodiment, six connecting columns 4 are provided, and the six connecting columns 4 are equally spaced along the circumferential direction of the fixing members 1. Four supporting members 2 are provided, and the four supporting members 2 are equally spaced along the circumferential direction of the fixing members 1.
[0036] Refer to Figure 3 and Figure 4 As shown in, in some embodiments, the cantilever 31 of the cantilever structure 3 is fixed to the side wall of the fixing member 1. The two cantilevers 31 and the fixing member 1 form a U-shaped structure. The internal space of the U-shaped structure is a limiting space 311 for restricting the bending limiter 200, and the opening of the U-shaped structure allows the bending limiter 200 to enter the limiting space 311. A buffer pad 312 is provided on the side of the cantilever 31 facing the limiting space 311. The buffer pad 312 can prevent the bending limiter 200 from directly colliding with the cantilever 31 when making small swings in the limiting space 311, resulting in wear and damage of the bending limiter 200. The buffer pad 312 and the cantilever 31 can be adhesively connected. The buffer pad 312 is made of polyethylene rubber. The distance between the buffer pad 312 and the bending limiter 200 is L, and L satisfies: 50mm ≤ L ≤ 100mm, so as to fully consider the installation space of the bending limiter 200 and the amplitude of the allowed swing.
[0037] Refer to Figure 3 and Figure 4 As shown in, in some ways, the cantilever structure 3 further includes a second connecting rod 32, and the second connecting rod 32 is connected between the two cantilevers 31. The second connecting rod 32 connects the two cantilevers 31 and enhances the stiffness of the cantilever structure 3.
[0038] Refer to Figure 1 and Figure 2As shown, in some embodiments, the bending limiter protection device further includes a stiffening plate 6, one side of the stiffening plate 6 is connected to the cantilever 31, and the other side of the stiffening plate 6 is connected to the fixing member 1. The connection between the cantilever 31 and the fixing member 1 is strengthened by the stiffening plate 6. When there are multiple cantilever 31, a stiffening plate 6 is provided at the connection between each cantilever 31 and the fixing member 1.
[0039] See also Figure 1 and Figure 2 As shown, in some embodiments, the bending limiter protection device further includes a limiter 7, the top of which is in contact with the fixing member 1, and the side wall of which is used to connect with the monopile wind turbine foundation 100. The limiter 7 is arranged at the design elevation position where the fixing member 1 needs to sink, and the limiter 7 forms a limiting effect on the fixing member 1 to prevent the fixing member 1 from sinking too much and causing the bending limiter 200 to be separated from the limiting space 311 of the cantilever structure 3. When the fixing member 1 is annular, a plurality of limiters 7 can be provided, and the plurality of limiters 7 are arranged at intervals along the circumference of the fixing member 1. In this embodiment, two limiters 7 are provided.
[0040] In some embodiments, the fixing member 1, the supporting member 2, and the cantilever 31 are all steel structures, which are convenient to construct and have good economy and applicability.
[0041] The working process of the utility model is:
[0042] After the construction of the monopile wind turbine foundation 100 is completed, the fixing member 1 is sleeved on the outer peripheral side of the monopile wind turbine foundation 100, and the supporting member 2 is inserted to a set distance below the seabed surface 300. The bending limiter 200 is clamped in the limiting space 311 of each cantilever structure 3, and the cantilever structure 3 constrains the out-of-plane swing of the bending limiter 200.
[0043] In summary, the embodiment of the utility model provides a bending limiter protection device for a single pile wind turbine foundation, which forms a limiting space 311 for limiting the swing of the bending limiter 200 through the interval between the two cantilevers 31 of the cantilever structure 3. When in use, the support member 2 is inserted below the seabed surface 300 to ensure the stability of the fixing member 1, and the bending limiter 200 is placed in the limiting space 311 of the cantilever structure 3. When the bending limiter 200 swings out of the plane under the action of waves and currents, the two sides of the bending limiter 200 are respectively blocked by the two cantilevers 31 during the swinging process, so that the two cantilevers 31 constrain the out-of-plane swing of the bending limiter 200, preventing the bending limiter 200 from being damaged by over-bending due to excessive swinging, thereby effectively protecting the submarine cable, ensuring the safety and stability of the submarine cable during the operation of the wind turbine, and avoiding the situation where the wind turbine cannot supply power due to damage to the submarine cable during operation.
[0044] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present utility model.
Claims
1. A bending limiter protection device for a monopile wind turbine foundation, characterized in that: include: A fixing member, used to be arranged on the outside of the monopile wind turbine foundation; A support member, one end of which is connected to the bottom of the fixing member, and the other end of which is used to be inserted below the seabed surface; as well as The cantilever structure comprises two cantilevers spaced apart on the fixing member, one end of the cantilever being connected to the fixing member, and the other end of the cantilever extending in a direction away from the fixing member and tilted upward; the interval between the two cantilevers forms a limiting space for limiting the swing of the bending limiter.
2. The bending limiter protection device for a monopile wind turbine foundation according to claim 1, characterized in that: The fixing member is annular and is used to be sleeved on the outer peripheral side of the single pile wind turbine foundation. A receiving cavity is provided inside the fixing member, and a water inlet hole communicating with the receiving cavity is opened on the side wall of the fixing member.
3. The bending limiter protection device for a monopile wind turbine foundation according to claim 2, characterized in that: There are multiple fixing members, and the multiple fixing members are arranged at intervals along the axial direction of the fixing members. A connecting column is connected between two adjacent fixing members. The cantilever structure is provided on each of the fixing members, and the supporting member is connected to one of the fixing members.
4. The bending limiter protection device for a monopile wind turbine foundation according to claim 3, characterized in that: The interior of the connecting column is hollow and communicates with the accommodating cavity of each of the fixing members, and the water inlet hole is opened on the side wall of the fixing member located on the upper side.
5. The bending limiter protection device for a monopile wind turbine foundation according to claim 3, characterized in that: The bend limiter protection device further includes a first connecting rod connected between two adjacent cantilever structures.
6. The bending limiter protection device for a monopile wind turbine foundation according to claim 1, characterized in that: A buffer pad is provided on one side of the cantilever facing the limiting space.
7. The bending limiter protection device for a monopile wind turbine foundation according to claim 1, characterized in that: The cantilever structure further includes a second connecting rod, and the second connecting rod is connected between the two cantilevers.
8. The bending limiter protection device for a monopile wind turbine foundation according to claim 1, characterized in that: The bend limiter protection device also includes a stiffening plate, one side of which is connected to the cantilever and the other side of which is connected to the fixing member.
9. The bending limiter protection device for a monopile wind turbine foundation according to claim 1, characterized in that: The support member has a pointed end at one end thereof for being inserted into the seabed surface.
10. The bending limiter protection device for a monopile wind turbine foundation according to claim 1, characterized in that: The bending limiter protection device also includes a limiting member, the top of which abuts against the fixing member, and the side wall of which is used to be connected to the monopile wind turbine foundation.