Efficient and stable underground engineering supporting device for offshore wind power set

Abstract

The invention provides an efficient and stable underground engineering supporting device for an offshore wind power set, and belongs to the technical field of wind power engineering, the efficient and stable underground engineering supporting device comprises a single-pile foundation and a supporting unit, and the supporting unit comprises a base, an inserting part, a vertical cylinder, a connecting part, a compression cavity and an elastic part; the supporting units composed of the bases, the inserting parts, the vertical cylinders, the compression cavities, the first springs and the vertical rods are designed on the two sides of the single-pile foundation and tightly combined with the single-pile foundation, so that the supporting units form a multi-point supporting system for supporting the single-pile foundation, the weight of a wind generating set and various environmental loads are jointly borne, and the supporting effect is good. The overall stability and the bearing capacity of the whole offshore wind power foundation are improved, meanwhile, the instantaneous impact force of the base when the single pile sinks is reduced, the base and the inserting part are protected, the inserting part is stably and mildly inserted into the soil layer, disturbance to the soil layer is reduced, stable combination with the soil layer is promoted, and a solid foundation is laid for an offshore wind power set.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power engineering, and in particular to a highly efficient and stable underground engineering support device for an offshore wind power group. Background Art

[0002] Offshore wind power generation is a clean and environmentally friendly way of generating electricity, and all countries are vigorously promoting it. Wind power generation is second only to hydropower generation, accounting for 16% of the world's renewable energy power generation. The installed capacity of offshore wind turbines in my country has also increased year by year. Offshore wind turbines in deep waters are installed on the upper end of a single pile foundation, and the lower end of the single pile foundation is vertically inserted into the seabed. The single pile foundation is the key to supporting the entire offshore wind turbine.

[0003] At present, the monopile foundation used to install offshore wind turbines is usually penetrated into the seabed soil layer by hammering. Since there are always surges in deep sea waters, this surge will impact the monopile foundation in the seawater, causing the tower to tilt, reducing the stability of the monopile foundation and reducing the bearing capacity and anti-overturning force of the monopile foundation, which poses a serious threat to the safe operation of the wind turbine installed on the monopile foundation. To this end, in response to this problem, the present invention proposes an efficient and stable underground engineering support device for offshore wind turbines. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a highly efficient and stable underground engineering support device for offshore wind power groups that can overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: an efficient and stable underground engineering support device for offshore wind power groups, including a single pile foundation and a plurality of support units arranged around the single pile foundation, wherein the support unit includes a base that contacts the ground, a vertical downward plug-in portion is fixed to the bottom of the base, a vertical cylinder is fixed to the top of the base, a connecting portion is provided between the top of the vertical cylinder and the surface of the single pile foundation, when the connecting portion and the top of the vertical cylinder are in sliding connection, a compression chamber is provided inside the vertical cylinder, and an elastic portion is connected between the sliding end of the connecting portion located inside the compression chamber and the bottom wall of the compression chamber, which is used to disperse and absorb the impact force generated when the base contacts the seabed.

[0006] Preferably, the end of the plug-in portion connected to the top of the base is a circular end, and the end of the plug-in portion inserted into the seabed soil layer is a conical tip.

[0007] Preferably, the monopile foundation comprises an exposed section, a submerged section and an inverted cone section which are sequentially connected from top to bottom.

[0008] Preferably, the connecting portion comprises an arc-shaped connecting plate connected to the exposed section, an inclined extension rod is fixed on the arc-shaped connecting plate, and a vertical rod sliding with the top of the vertical tube is fixed between the other end of the inclined extension rod and the top of the elastic portion.

[0009] Preferably, the elastic part includes a spring 1 fixed on the bottom wall of the compression chamber, a moving block that fits the inner wall of the compression chamber is fixed to the other end of the spring 1, and the top of the moving block is fixed to the bottom end of the vertical rod.

[0010] Preferably, the arc-shaped connecting plate and the exposed section are detachably connected.

[0011] Preferably, when the vertical cylinder slides along the surface of the vertical rod, a telescopic member for clamping the single pile foundation is provided on the base.

[0012] Preferably, the telescopic member includes a horizontal extension plate fixed on the base, a movable chamber is provided in the horizontal extension plate, an air guide groove is connected between the bottom wall of the compression chamber and the side wall of the movable chamber, a movable opening connected to the movable chamber is opened on the side of the horizontal extension plate facing the surface of the single pile foundation, and a resistance part is provided in the compression chamber which moves toward the outside of the movable opening.

[0013] Preferably, the resistance part includes a pair of springs 2 fixed on the side wall of the moving cavity, the other end of the spring 2 is fixed with a push plate that fits with the inner wall of the moving cavity, the push plate is located on the side corresponding to the moving port and is fixed with a resistance plate that fits with the moving port, and the resistance plate is located on the side that fits with the surface of the single pile foundation and is provided with an arc groove.

[0014] Preferably, when the two contact plates overlap, the two contact plates form a complete square shielding structure for shielding the connection between the single pile foundation and the seabed.

[0015] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: The support unit composed of the base, the insertion part, the vertical cylinder, the compression chamber, the first spring and the vertical rod in the present invention is designed on both sides of the single-pile foundation and is closely combined with the single-pile foundation, so that the support unit forms a multi-point support system for the support of the single-pile foundation, jointly bearing the weight of the wind turbine generator and various environmental loads. This not only improves the overall stability and bearing capacity of the entire offshore wind power foundation, but also reduces the instantaneous impact force on the base during the sinking process of the single-pile foundation, protects the base and the insertion part from damage, and also ensures that the insertion part can gradually insert into the seabed soil layer in a more stable and gentle manner, reducing the disturbance and damage to the surrounding seabed soil layer. This gentle insertion method helps the insertion part to be more deeply combined with the seabed soil layer, forming a more stable support structure, laying a solid and stable foundation for the entire offshore wind power unit; During the insertion process of the insertion part into the seabed soil layer, the compressed gas in the compression chamber can also be used to drive the contact plate in the telescopic part to closely fit and clamp the single-pile foundation. This mechanism not only further enhances the stability of the single-pile foundation, but also effectively blocks the erosion of the seawater vortex on the sand around the single-pile foundation through the square shielding structure formed by the contact plate, maintaining the stability and bearing capacity of the sand, ensuring that the single-pile foundation can reach the ideal mud penetration depth and maintain the stability of the overall structure. Description of the Drawings

[0016] Figure 1 Schematic cross-sectional structure diagram of the vertical cylinder of a high-efficiency and stable underground engineering support device for an offshore wind power unit provided by the present invention; Figure 2 For the present invention Figure 2 Partial enlarged structure schematic diagram at A in Figure 3 Schematic connection structure diagram of the connection part of a high-efficiency and stable underground engineering support device for an offshore wind power unit provided by the present invention; Figure 4 Schematic connection structure diagram of the contact plate and the moving cavity of a high-efficiency and stable underground engineering support device for an offshore wind power unit provided by the present invention Figure 1 ; Figure 5 Schematic connection structure diagram of the contact plate and the moving cavity of a high-efficiency and stable underground engineering support device for an offshore wind power unit provided by the present invention Figure 2 ; Figure 6 Schematic top cross-sectional structure diagram of the horizontal extension plate of a high-efficiency and stable underground engineering support device for an offshore wind power unit provided by the present invention; Figure 7 Schematic exploded connection structure diagram of the vertical rod and the vertical cylinder of a high-efficiency and stable underground engineering support device for an offshore wind power unit provided by the present invention; Figure 8 Schematic diagram of the connection and explosion structure between the contact plate and the horizontally extending plate of a high-efficiency and stable underground engineering support device for an offshore wind power unit provided by the present invention.

[0017] In the figure: 1, monopile foundation; 11, exposed section; 12, submerged section; 13, inverted cone section; 2, support unit; 21, base; 22, insertion part; 23, vertical cylinder; 24, connection part; 241, arc-shaped connecting plate; 242, inclined extension rod; 243, vertical rod; 25, compression chamber; 26, elastic part; 261, spring one; 262, moving block; 3, telescopic part; 31, horizontally extending plate; 32, moving chamber; 33, air guide groove; 34, moving port; 35, contact part; 351, spring two; 352, pushing plate; 353, contact plate; 354, arc-shaped groove. Specific embodiments

[0018] The following further describes the present invention in detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it according to the description in the specification.

[0019] It should be understood that the terms such as "having", "including" and "comprising" used herein do not exclude the presence or addition of one or more other elements or their combinations.

[0020] In the description of the present invention, the orientation or positional relationship indicated by the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "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 invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0021] Refer to Figures 1 - 8 , a high-efficiency and stable underground engineering support device for an offshore wind power unit, including a monopile foundation 1 and a plurality of support units 2 arranged around the monopile foundation 1. Among them, the monopile foundation 1 includes an exposed section 11, a submerged section 12 and an inverted cone section 13 connected in sequence from top to bottom. The exposed section 11 is the upper structure of the monopile foundation 1, and its main function is to connect and stably support the wind turbine generator. The submerged section 12 is located below the sea level to a certain depth and is the middle part connecting the exposed section 11 and the inverted cone section 13. The inverted cone section 13 is the lower structure of the monopile foundation 1, and its inverted cone shape design helps to generate greater lateral friction resistance and end bearing capacity when driving into the seabed soil layer. As the pile body penetrates deeper, the inverted cone section 13 gradually expands the contact area with the soil layer, thereby increasing the friction force and making the monopile foundation 1 more firmly rooted in the seabed.

[0022] A plurality of support units 2 are arranged around the single-pile foundation 1, forming a multi-point support system, aiming to further enhance the stability and bearing capacity of the single-pile foundation 1 for cooperating with the offshore wind power foundation. Among them, each support unit 2 includes parts such as a base 21, a plug-in part 22, a vertical cylinder 23, and a connecting part 24. As the single-pile foundation 1 sinks, the plug-in part 22 of the support unit 2 gradually penetrates into the seabed soil layer. During this process, the close contact between the plug-in part 22 and the soil layer not only enhances the stability of the support unit 2 itself, but also provides additional supporting force for the single-pile foundation 1 by increasing the contact area and friction force. The support units 2 are firmly connected to the single-pile foundation 1 through the connecting part 24, forming an integral support system. This system tightly combines the single-pile foundation 1 and the support units 2 together to jointly bear the weight of the wind turbine generator and various environmental loads, improving the overall stability and bearing capacity of the entire offshore wind power foundation.

[0023] In the above technical solution, during use, the single-pile foundation 1 is first deeply driven into the seabed soil layer by means of hammering, such as hydraulic devices, pneumatic devices, electric drive devices, Moor drive devices, etc., to ensure that the single-pile foundation 1 can be firmly rooted in the seabed and bear the weight of the subsequent wind turbine generator and various environmental loads. As the single-pile foundation 1 continuously moves downward, the base 21 in the surrounding support units 2 gradually contacts the seabed ground, causing the plug-in part 22 at the bottom of the base 21 to also extend into the seabed bottom layer. Through the combined action of the firm rooting of the single-pile foundation 1 and the multi-point support of the support units 2, a safe and reliable operating environment is provided for the wind turbine generator. This design not only improves the bearing capacity and stability of the offshore wind power foundation, but also reduces the operating risks and maintenance costs, providing a strong guarantee for the sustainable development of offshore wind power.

[0024] Considering the above technical solution, if the connecting part 24 is directly fixed between the single-pile foundation 1 and the top of the vertical cylinder 23, when the single-pile foundation 1 moves downward under the impact of hammering, the impact force it receives will be directly transmitted to the base 21 of the support unit 2 through the connecting part 24. This direct impact transmission may cause the base 21 to receive a relatively large instantaneous impact force, increasing the risk of damage to the base 21 and the surrounding seabed soil layer, affecting the bonding effect between the plug-in part 22 and the seabed soil layer, and even may cause the plug-in part 22 to be damaged or unable to effectively penetrate into the seabed bottom layer. Therefore, based on this problem, for the further optimization of the above technical solution, when the connecting part 24 is slidably connected to the top of the vertical cylinder 23, a compression cavity 25 is provided inside the vertical cylinder 23, and an elastic part 26 is connected between the end of the connecting part 24 that slides inside the compression cavity 25 and the bottom wall of the compression cavity 25. Among them, the connecting part 24 includes an arc-shaped connecting plate 241 connected to the exposed section 11. The arc-shaped connecting plate 241 and the exposed section 11 are detachably connected, for example, by means of screws. Corresponding threaded holes are designed between the arc-shaped connecting plate 241 and the exposed section 11, and then they can be locked and fixed by locking bolts. An inclined extension rod 242 is fixed on the arc-shaped connecting plate 241, and a vertical rod 243 that slides with the top of the vertical cylinder 23 is fixed between the other end of the inclined extension rod 242 and the top of the elastic part 26. The elastic part 26 includes a first spring 261 fixed on the bottom wall of the compression cavity 25. The other end of the first spring 261 is fixed with a moving block 262 that fits against the inner wall of the compression cavity 25. The top of the moving block 262 is fixed at the bottom end of the vertical rod 243.

[0025] In the above optimized technical solution, when the single-pile foundation 1 moves downward under the impact of hammering, its impact force will first be transmitted to the connecting part 24. Since the connecting part 24 and the top of the vertical cylinder 23 are designed to be slidably connected, and a compression cavity 25 is provided inside the vertical cylinder 23, the vertical rod 243 in the connecting part 24 can slide inside the compression cavity 25. This design allows the connecting part 24 not to directly transmit all the impact force to the base 21 when receiving the impact force, but to slow down the impact through the sliding of the vertical rod 243 inside the compression cavity 25. When the vertical rod 243 slides downward under the impact force, it will compress the first spring 261, causing the moving block 262 to move along the inner wall of the compression cavity 25. During this process, the elastic deformation of the first spring 261 absorbs part of the impact force, thereby reducing the impact force transmitted to the base 21. This buffering mechanism effectively reduces the instantaneous impact force received by the base 21 during the sinking of the single-pile foundation 1, protects the base 21 and the plug-in part 22 from damage, and at the same time ensures that the plug-in part 22 can gradually insert into the seabed soil layer in a more stable and gentle manner, and also significantly reduces the disturbance and damage to the surrounding seabed soil layer. This gentle insertion method helps the plug-in part 22 to be more deeply combined with the seabed soil layer, forming a more stable support structure, laying a solid and stable foundation for the entire offshore wind power unit.

[0026] When the vertical cylinder 23 slides along the surface of the vertical rod 243, a telescopic member 3 for clamping the single-pile foundation 1 is provided on the base 21. The telescopic member 3 includes a horizontally extending plate 31 fixed on the base 21. A moving cavity 32 is provided in the horizontally extending plate 31. A gas guide groove 33 is communicated between the bottom wall of the compression cavity 25 and the side wall of the moving cavity 32. A moving port 34 communicated with the moving cavity 32 is formed on one side of the horizontally extending plate 31 facing the surface of the single-pile foundation 1. A resisting portion 35 moving outward from the moving port 34 is provided in the compression cavity 25. The resisting portion 35 includes a pair of second springs 351 fixed on the side wall of the moving cavity 32. The other end of the second spring 351 is fixed with a pushing plate 352 fitting with the inner wall of the moving cavity 32. A resisting plate 353 fitting with the moving port 34 is fixed on one side of the pushing plate 352 corresponding to the moving port 34. An arc-shaped groove 354 is provided on one side of the resisting plate 353 fitting with the surface of the single-pile foundation 1.

[0027] In the above technical solution, when the inserting portion 22 at the bottom of the base 21 is gradually inserted into the seabed soil layer, the vertical cylinder 23 will also gradually move along the surface of the vertical rod 243. In this way, the gas in the cavity corresponding to the bottom wall of the compression cavity 25 and the moving block 262 will be gradually compressed, and the compressed gas will be continuously transported into the moving cavity 32 through the gas guide groove 33. As the gas inside the moving cavity 32 gradually increases, it will also gradually drive the pushing plate 352 to slide along the inner wall of the moving cavity 32. Furthermore, the resisting plate 353 designed on one side of the pushing plate 352 will extend outwards from the moving port 34 until the arc-shaped groove 354 on the resisting plate 353 fits on the surface of the single-pile foundation 1. In this way, the surface of the single-pile foundation 1 can be clamped, further improving the stability of the single-pile foundation 1 at the connection near the ground under the sea. At the same time, the settlement and displacement of the single-pile foundation 1 in the seabed soil layer are also reduced, ensuring the long-term stability and safety of the entire offshore wind power foundation.

[0028] It is worth mentioning that in the marine environment, sea water surges are likely to form vortices around the single-pile foundation 1. These vortices not only increase the impact force of the water flow on the foundation structure, but also intensify the scouring and transportation of the surrounding sand and soil through their rotational movement. When the two resisting plates 353 overlap to form a square shielding structure, the free flow path of the vortices in these areas can be effectively blocked, which means that the vortices cannot directly impact the side wall or the bottom of the single-pile foundation 1, thereby reducing the direct damage of the vortices to the foundation structure.

[0029] Secondly, the rotational motion of the vortex may also drive the surrounding sand particles to rotate and move, forming a scouring phenomenon. This scouring effect will gradually weaken the supporting force of the sand around the single pile foundation 1, resulting in a decrease in the foundation's depth into the mud and a decrease in stability. The presence of the square shielding structure significantly reduces the scouring effect of the vortex on the sand, because the square shielding structure reduces the contact area and contact time between the vortex and the sand. The sand can remain relatively stable under the protection of the shielding structure and is not easily carried away by the water flow, thereby maintaining the depth of the single pile foundation 1 into the mud and the supporting force of the surrounding soil.

[0030] In summary, the square shielding structure formed by the overlapped contact plates 353 not only enhances the clamping effect of the single pile foundation 1, but also provides a strong guarantee for the safe operation of the offshore wind power system by blocking the vortex path, reducing sand scouring, maintaining the depth and stability of the mud, and enhancing the overall structural strength.

[0031] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which are equivalent modifications and improvements made to the above embodiments based on the essential technology of the present invention, and all of them belong to the protection scope of the present invention.

Claims

1. An underground engineering support device for efficient and stable operation of an offshore wind power group, characterized in that, include: A single pile foundation (1) and a plurality of support units (2) arranged around the single pile foundation (1); The support unit (2) comprises a base (21) in contact with the ground, a plug-in portion (22) extending vertically downward is fixed to the bottom of the base (21), a vertical cylinder (23) is fixed to the top of the base (21), and a connecting portion (24) is provided between the top of the vertical cylinder (23) and the surface of the single pile foundation (1); When the connecting portion (24) is slidably connected to the top of the vertical cylinder (23), a compression chamber (25) is provided inside the vertical cylinder (23), and an elastic portion (26) is connected between an end of the connecting portion (24) located inside the compression chamber (25) and sliding therein and a bottom wall of the compression chamber (25) for dispersing and absorbing impact force generated when the base (21) contacts the seabed.

2. The high-efficiency and stable underground engineering support device for an offshore wind power group according to claim 1, characterized in that, One end of the plug-in portion (22) connected to the top of the base (21) is a circular end, and one end of the plug-in portion (22) inserted into the seabed soil layer is a conical tip.

3. The high-efficiency and stable underground engineering support device for an offshore wind power group according to claim 1, wherein, The monopile foundation (1) comprises an exposed section (11), a submerged section (12) and an inverted cone section (13) which are sequentially connected from top to bottom.

4. A highly efficient and stable underground engineering support device for an offshore wind power unit according to claim 3, characterized in that, The connecting portion (24) comprises an arc-shaped connecting plate (241) connected to the exposed section (11), an inclined extension rod (242) being fixed to the arc-shaped connecting plate (241), and a vertical rod (243) sliding with the top of the vertical tube (23) being fixed between the other end of the inclined extension rod (242) and the top of the elastic portion (26).

5. The high-efficiency and stable underground engineering support device for an offshore wind power unit according to claim 4, wherein, The elastic portion (26) comprises a spring 1 (261) fixed on the bottom wall of the compression chamber (25); a moving block (262) that fits the inner wall of the compression chamber (25) is fixed to the other end of the spring 1 (261); and the top of the moving block (262) is fixed to the bottom end of the vertical rod (243).

6. The high-efficiency and stable underground engineering support device for an offshore wind power unit according to claim 4, characterized in that, The arc-shaped connecting plate (241) and the exposed section (11) are detachably connected.

7. A high-efficiency and stable underground engineering support device for an offshore wind power unit according to claim 4, characterized in that, When the vertical cylinder (23) slides along the surface of the vertical rod (243), a telescopic member (3) for clamping the single pile foundation (1) is provided on the base (21).

8. A high-efficiency and stable underground engineering support device for an offshore wind power group according to claim 7, characterized in that The telescopic member (3) comprises a horizontal extension plate (31) fixed on the base (21), a movable chamber (32) being provided in the horizontal extension plate (31), an air guide groove (33) being connected between the bottom wall of the compression chamber (25) and the side wall of the movable chamber (32), a movable opening (34) being connected to the movable chamber (32) being provided on a side of the horizontal extension plate (31) facing the surface of the single pile foundation (1), and a resistance portion (35) being movable toward the outside of the movable opening (34) being provided in the compression chamber (25).

9. The high-efficiency and stable underground engineering support device for an offshore wind power unit according to claim 8, characterized in that, The abutment portion (35) comprises a pair of springs (351) fixed on the side wall of the moving cavity (32); a push plate (352) fitted with the inner wall of the moving cavity (32) is fixed to the other end of the spring (351); a resistance plate (353) fitted with the moving cavity (34) is fixed to the side of the push plate (352) corresponding to the moving opening (34); and an arc groove (354) is provided on the side of the resistance plate (353) fitted with the surface of the single pile foundation (1).

10. A high-efficiency and stable underground engineering support device for an offshore wind power unit according to claim 9, characterized in that, When the two abutment plates (353) overlap, the two abutment plates (353) form a complete square shielding structure, which is used to shield the connection between the single pile foundation (1) and the seabed.

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