Tidal current energy power station structure

Abstract

The invention relates to a tidal current energy power station structure which comprises a pile foundation, a steel casing, a bearing platform, a stand column, a working platform and a tidal current energy motor assembly, the outer side of the pile foundation is sleeved with the steel casing, the pile foundation adopts one or more piles, and the lower end of the pile foundation is embedded into a seabed rock stratum; the lower end of the pile foundation and the lower end of the steel casing are both located below the seabed stratum plane, the upper end of the pile foundation and the upper end of the steel casing are inserted into the bearing platform together to form an integral structure, the stand columns are arranged on the two sides of the upper portion of the bearing platform respectively, and the tidal current energy motor assembly is integrally placed on the bearing platform and located between the stand columns on the two sides. The stand column is used for supporting the tidal current energy motor assembly and enhancing the stability of the overall structure, and a working platform is arranged at the top of the stand column and located above the sea level. The strict requirement for installation of the tidal current energy motor is met, and the service life of the overall structure of the tidal current energy power station is remarkably prolonged.

Description

Technical Field

[0001] The invention belongs to the field of tidal energy power generation, and in particular relates to a tidal energy power station structure. Background Art

[0002] As a cutting-edge new energy technology, tidal power generation technology has received widespread attention worldwide and has become one of the world's leading technologies in my country's new energy field. At present, the LHD ocean tidal power generation project is the only operating equipment in the world that has achieved megawatt-level continuous power generation and grid-connected operation and maintained stable operation across four seasons. The first, second and third phases of the LHD ocean tidal power generation use steel conductor frames as motor assembly platforms. This design has certain advantages in ensuring the installation and operation of the equipment, and provides the necessary structural support and rigid foundation for the entire system.

[0003] However, the use of steel jackets has exposed many deficiencies in practical applications. First, steel jackets are susceptible to corrosion and fatigue damage in the harsh marine environment, and their overall service life is relatively short; second, their structural form is obviously insufficient in bending and shear bearing capacity when bearing the large loads generated by tidal energy motors, and it is difficult to meet the high requirements of tidal energy motors for the stability and bearing performance of the installation platform. Especially in deep water conditions, the safety, durability and bearing capacity of the steel jacket structure are greatly challenged, which limits its widespread application in more harsh marine environments; these problems seriously restrict the promotion of tidal energy power stations to deep water areas and their long-term stable operation. Summary of the invention

[0004] In view of the defects of the prior art such as insufficient durability and limited structural load-bearing capacity, the present invention provides a tidal power station structure, which aims to meet the strict requirements for the installation of tidal power motors and significantly improve the service life of the overall structure of the tidal power station.

[0005] To achieve the above object, the technical solution of the present invention is as follows:

[0006] A tidal power station structure comprises a pile foundation, a steel casing, a cap, columns, a working platform and a tidal power motor assembly, wherein the outer side of the pile foundation is sleeved with a steel casing, the pile foundation adopts a single pile or multiple piles, the lower end of the pile foundation is embedded in the seabed rock layer, the lower ends of the pile foundation and the steel casing are both located below the seabed stratum plane, the pile foundation and the upper end of the steel casing are inserted into the cap together to form an integral structure, columns are respectively provided on both sides above the cap, the tidal power motor assembly is placed as a whole on the cap and between the columns on both sides, the columns are used to support the tidal power motor assembly and enhance the stability of the overall structure, and a working platform is provided on the top of the column, and the working platform is located above the sea level.

[0007] Preferably, the pile foundation, the cap and the column are all concrete structures.

[0008] Preferably, the pile foundation is a concrete structure, and the cap and columns are steel structures.

[0009] Preferably, a plurality of detachable transverse connection systems are arranged between the columns on both sides from top to bottom to increase the wave resistance between the columns.

[0010] Preferably, the lower end of the steel casing is embedded in the seabed rock formation, and the steel casing is used to drill a hole in the seabed rock formation to a designed elevation to complete the concrete pouring of the pile foundation.

[0011] Preferably, the top of the steel casing is flush with the top of the pile foundation, the embedding depth of the lower end of the steel casing in the seabed rock formation is less than the embedding depth of the lower end of the pile foundation in the seabed rock formation, and the embedding depth of the steel casing in the rock formation is the most unfavorable position determined according to force calculation.

[0012] Preferably, the support platform is circular, streamlined or other planar shape that can reduce tidal energy loss.

[0013] Preferably, the column is semicircular, streamlined or other planar shape that can reduce tidal energy loss.

[0014] Preferably, the foundation may be a concrete solid or hollow structure.

[0015] Preferably, a steel sleeve is provided on the lower side of the support platform, and the steel sleeve is sleeved outside the steel casing.

[0016] Preferably, the steel sleeve realizes accurate docking between the pile foundation and the pedestal during the construction process, and an annular airbag is arranged between the steel casing and the steel sleeve. The annular airbag is inflated to form a closed water-blocking system, which can prevent seawater from seeping into the pedestal during the construction process.

[0017] Preferably, the annular airbag is connected to an automatic inflation system and is equipped with a pressure sensor to automatically adjust the inflation degree of the airbag according to real-time ocean pressure changes.

[0018] Preferably, the tidal current energy motor assembly comprises a nacelle, blades and a turbine jacket, and the turbine jacket is fixedly arranged in a vertical direction between the support platform and the working platform.

[0019] Preferably, the surface of the steel casing is coated with an anti-corrosion coating to improve durability in a marine environment.

[0020] Preferably, the pile foundation is provided with a reinforcing steel mesh in the concrete.

[0021] Compared with the prior art, the advantages of the present invention are as follows: first, the main structure of the power station adopts a concrete structure, which gives full play to the economy of concrete, and also gives full play to the excellent performance of concrete structure in corrosion resistance and anti-aging compared with steel structure, thereby significantly extending the service life of the overall structure; second, the pile foundation adopts a steel-concrete composite pile foundation, and a steel casing is arranged on the outside of the concrete pile foundation. The steel casing can meet the requirements of pile foundation construction, and after the pile foundation is formed, it can also form a steel-concrete composite structure with the pile foundation, participate in the structural force, so that the structure is effectively enhanced in terms of bending and shear resistance, and even in the harsh marine environment, it can ensure a high bearing capacity and structural safety; in addition, a plurality of detachable transverse connection systems are arranged between the columns in the structure, and this design further improves the wave resistance between the columns, so that the entire power station can remain stable when impacted by waves, and ensure the long-term safe operation of the equipment; finally, the structural design is reasonable, and the mutual connection relationship between the components is clear, which is helpful to improve the reliability and maintenance efficiency of the overall project, and provides a solid technical support for the promotion and application of marine tidal energy power generation technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural elevation view of a tidal power station structure according to an embodiment of the present invention;

[0023] Figure 2 It is a structural plan view of a tidal power station structure according to an embodiment of the present invention.

[0024] Explanation of the reference numerals: 1-pile foundation; 2-steel casing; 3-cap; 4-column; 5-working platform; 6-tidal current energy motor assembly; 61-engine room; 62-blade; 63-turbine conductor frame; 7-lateral connection system; 8-steel sleeve. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the present invention.

[0026] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0027] like Figure 1 As shown, this embodiment discloses a tidal power station structure, including a pile foundation 1, a steel casing 2, a cap 3, a column 4, a working platform 5 and a tidal power motor assembly 6. The pile foundation 1 is composed of a single or multiple piles, and a steel casing 2 is sleeved on the outside. This design can not only enhance the bending and shearing resistance of the overall structure, but also increase the structure's ability to resist seawater erosion; the lower end of the pile foundation 1 is embedded in the seabed rock formation. Through this embedding method, the structure can be firmly fixed to the seabed, thereby improving the overall stability. At the same time, the lower ends of the pile foundation 1 and the steel casing 2 are both located below the seabed stratum plane to a certain design depth, which is conducive to resisting the influence of seabed water pressure and external unstable factors. The pile foundation 1 and the upper end of the steel casing 2 are inserted into the cap 3 together. The cap 3 not only serves as a load-bearing platform for the unit in the entire structure, but also plays an important role in connecting the lower foundation and the upper structure, forming an overall stable structural system. Columns 4 are respectively arranged on both sides above the pedestal 3. These columns 4 not only support the tidal energy motor assembly 6, but also enhance the lateral stability and wave resistance of the structure. The tidal energy motor assembly 6 is placed on the pedestal 3 as a whole and is located between the columns 4 on both sides. This reasonable arrangement ensures that the motor assembly has a good balance and reliability during operation. A working platform 5 is arranged on the top of the column 4. The working platform 5 is located above the sea level, providing a convenient and reliable operating place for daily inspection and maintenance of the equipment.

[0028] In this embodiment, the use of steel casing 2 in the construction process can simplify the construction process, and is particularly suitable for working conditions with a water depth of fifty to sixty meters. This is because the steel casing 2 can be used as a concrete pouring channel during deep-water operations, and can also be used as a guide and positioning element during the subsequent pouring of the upper structure, effectively ensuring the accuracy and continuity of the pouring process. At the same time, the steel casing 2 acts as a temporary construction facility during the construction process, making the construction operation simpler and more efficient. After the pile foundation is formed in the later stage, it is used as a composite structure to bear force. By forming a composite force system with the concrete pile foundation 1, the steel casing 2 not only improves the bending and shear resistance of the entire structure, but also significantly enhances the concrete structure's resistance to seawater erosion and wave impact in the marine environment, thereby greatly improving the force-bearing performance and durability of the entire concrete structure.

[0029] In one embodiment, the pile foundation 1, the cap 3 and the column 4 are all made of concrete. The selection of such structural materials fully utilizes the corrosion resistance and long service life of concrete, ensuring the long-term stable operation of the entire power station structure in the marine environment. The pile foundation 1 is made of concrete structure, while in another embodiment, the pile foundation 1 is made of concrete structure, and the cap 3 and the column 4 are made of steel structure. Such a combination can not only give full play to the durability of concrete, but also utilize the high strength characteristics of steel to improve the load resistance of the overall structure.

[0030] In some embodiments, the column 4 is cast on site by cast-in-place method, and the seamless connection with the base 3 is achieved by means of on-site casting, thereby improving the overall earthquake resistance and durability; in other embodiments, if the floating crane of the floating crane prefabricated base 3 has sufficient carrying capacity, the base 3 and the column 4 can be prefabricated as an integrated component first, and then connected with the pile foundation 1 on site. This prefabrication method not only shortens the construction period, but also ensures the accuracy of the component size and the connection quality, while reducing the difficulty of on-site construction, thereby improving the assembly efficiency and operation stability of the overall structure of the tidal power station.

[0031] Furthermore, multiple detachable transverse connection systems 7 are arranged between the columns 4 on both sides from top to bottom. This design helps to evenly disperse the transverse loads generated by the wave action, and is easy to replace or adjust during maintenance to enhance the wave resistance of the structure. During the construction process, the lower end of the steel casing 2 is embedded in the seabed rock layer. By using the steel casing 2 to drill holes in the seabed rock layer to the design elevation, the concrete pouring of the pile foundation 1 is completed, thereby ensuring the accuracy of the pouring process and the close connection between the concrete and the steel casing. The top of the steel casing 2 is flush with the top of the pile foundation 1, and the embedding depth of the lower end of the steel casing 2 in the seabed rock layer is less than the embedding depth of the lower end of the pile foundation 1 in the seabed rock layer. This not only ensures that the steel casing 2 plays a role in reinforcement and protection in the overall structure, but also enables the pile foundation 1 to be more deeply embedded in the seabed rock layer to improve the overall bearing capacity and stability. The depth at which the steel casing 2 is embedded in the rock formation is the most unfavorable position determined according to the stress calculation. This depth parameter is obtained through detailed stress analysis to ensure that the steel casing 2 can play the best reinforcement role under the most severe working conditions, thereby achieving the optimal stress performance of the entire steel-concrete composite pile structure.

[0032] Among them, the pedestal 3 of the tidal energy power station structure is a circular or streamlined or other plane shape that can reduce the loss of tidal energy. This design helps to optimize the fluid dynamics performance, reduce the resistance of the structure to the flow of fluid, thereby reducing energy loss and improving the efficiency of tidal energy utilization. In addition, the column 4 is a semicircular or streamlined or other plane shape that can reduce the loss of tidal energy. This shape can optimize the fluid distribution under water flow and wind load, further reduce the energy loss caused by the structural shape, and enhance the stability of the overall structure. The cap 3 can be a solid or hollow concrete structure. This choice allows a balance between bearing capacity and deadweight according to engineering requirements. The solid structure provides a higher bearing capacity, while the hollow structure helps to reduce weight and facilitate construction. A steel sleeve 8 is provided on the lower side of the cap 3, and the steel sleeve 8 is sleeved outside the steel casing 2. This structural design ensures the precise docking between the cap 3 and the steel casing 2, and effectively promotes the mechanical transmission between the lower foundation and the upper structure; the steel sleeve 8 realizes the accurate docking between the pile foundation 1 and the cap 3 during the construction process, and an annular airbag is provided between the steel casing 2 and the steel sleeve 8. The annular airbag is inflated to form a closed water-blocking system, which can prevent seawater from infiltrating into the cap 3 during the construction process, thereby ensuring the environmental stability and construction quality of the concrete pouring, and providing conditions for subsequent construction. The annular airbag is connected to the automatic inflation system and is equipped with a pressure sensor to automatically adjust the inflation degree of the airbag according to the real-time ocean pressure changes. This automatic adjustment function ensures that the water-blocking system always remains closed under different sea conditions and effectively responds to changes in ocean pressure.

[0033] The tidal energy motor assembly 6 includes a nacelle 61, blades 62 and a turbine jacket 63. The turbine jacket 63 is fixedly arranged between the support platform 3 and the working platform 5. This arrangement not only ensures the stable support of the motor assembly 6 during operation, but also helps to achieve accurate installation and efficient operation of the equipment, and at the same time uses the kinetic energy of the sea to achieve energy conversion. When the seawater flows, it pushes the blades 62 to rotate. The blades 62 can fully capture and convert the kinetic energy of the sea current. The turbine jacket 63 stably transmits the rotation of the blades 62 to the generator in the nacelle 61, and then converts the mechanical energy into electrical energy, forming an efficient tidal energy power generation system. This power generation principle makes full use of the natural energy of ocean tides and water currents, ensuring that the equipment can continue to operate stably in complex marine environments.

[0034] In this embodiment, the surface of the steel casing 2 is coated with an anti-corrosion coating to improve durability in the marine environment. The anti-corrosion coating can effectively extend the service life of the steel casing 2 and reduce maintenance costs. The pile foundation 1 is provided with a reinforced steel mesh in the concrete. The provision of the reinforced steel mesh enables the pile foundation 1 to have higher compressive strength and crack resistance, thereby improving the overall stability and safety of the structure.

[0035] In summary, the present invention discloses a tidal power station structure, including a pile foundation 1, a steel casing 2, a cap 3, a column 4, a working platform 5 and a tidal power motor assembly 6. By combining concrete and steel, a steel casing 2 is sleeved on the outside of the pile foundation 1, and the upper ends of the pile foundation 1 and the steel casing 2 are inserted into the cap 3 to form an integral structure. Further, columns 4 are arranged on both sides above the cap 3 to support the tidal power motor assembly 6, and a working platform 5 is arranged on the top of the column 4, which provides a convenient platform for equipment inspection and maintenance during the later operation. The tidal power station structure utilizes the lower end of the pile foundation 1 embedded in the seabed rock layer and the steel casing 2 and the steel sleeve 8 to form a closed water-blocking system with an annular airbag, which not only improves the bending and shear bearing capacity and seawater erosion resistance of the overall structure, but also ensures long-term stable operation in a complex marine environment. The present invention not only improves the problem of insufficient structural stability and durability in the prior art, but also provides a compact, economical and practical innovative solution for tidal power generation, which is of great significance to promoting the wide application and industrial development of marine new energy technologies.

[0036] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention has been described in detail with reference to the above embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the above embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tidal current power station structure, characterized in that: The invention comprises a pile foundation (1), a steel casing (2), a capping platform (3), a column (4), a working platform (5) and a tidal energy motor assembly (6). The outer side of the pile foundation (1) is provided with a steel casing (2). The pile foundation (1) adopts a single pile or multiple piles. The lower end of the pile foundation (1) is embedded in the seabed rock layer. The lower ends of the pile foundation (1) and the steel casing (2) are both located below the seabed stratum plane. The upper ends of the pile foundation (1) and the steel casing (2) are inserted into the capping platform (3) together to form an integral structure. Columns (4) are respectively arranged on both sides above the capping platform (3). The tidal energy motor assembly (6) is placed as a whole on the capping platform (3) and is located between the columns (4) on both sides. The columns (4) are used to support the tidal energy motor assembly (6) and enhance the stability of the overall structure. A working platform (5) is arranged on the top of the column (4). The working platform (5) is located above the sea level.

2. The tidal current power station structure according to claim 1, characterized in that: The pile foundation (1), the cap (3) and the column (4) are all concrete structures.

3. The tidal current power station structure according to claim 1, characterized in that: The pile foundation (1) is a concrete structure, and the cap (3) and the column (4) are steel structures.

4. The tidal current power station structure according to claim 2 or 3, characterized in that: A plurality of detachable transverse connection systems (7) are arranged at intervals from top to bottom between the columns (4) on both sides to increase the wave resistance between the columns (4).

5. The tidal current power station structure according to claim 4, characterized in that: The lower end of the steel casing (2) is embedded in the seabed rock formation, and the steel casing (2) is used to drill a hole in the seabed rock formation to a designed elevation to complete the concrete pouring of the pile foundation (1).

6. The tidal current power station structure according to claim 5, characterized in that: The top of the steel casing (2) is flush with the top of the pile foundation (1), the embedding depth of the lower end of the steel casing (2) in the seabed rock layer is less than the embedding depth of the lower end of the pile foundation (1) in the seabed rock layer, and the embedding depth of the steel casing (2) in the rock layer is the most unfavorable position determined according to force calculation.

7. The tidal current power station structure according to claim 1, characterized in that: The support platform (3) is circular, streamlined or other planar in shape, which can reduce the loss of tidal energy.

8. The tidal current power station structure according to claim 1, characterized in that: The upright column (4) is semicircular, streamlined or other planar in shape to reduce tidal energy loss.

9. The tidal current power station structure according to claim 1, characterized in that: The foundation (3) may be a concrete solid or hollow structure.

10. The tidal current power station structure according to claim 9, characterized in that: A steel sleeve (8) is provided on the lower side of the support platform (3), and the steel sleeve (8) is sleeved outside the steel casing (2).

11. The tidal current power station structure according to claim 10, characterized in that: The steel sleeve (8) realizes accurate docking of the pile foundation (1) and the cap (3) during the construction process, and an annular air bag is arranged between the steel casing (2) and the steel sleeve (8). The annular air bag is inflated to form a closed water-blocking system, which can prevent seawater from penetrating into the cap (3) during the construction process.

12. The tidal current power station structure according to claim 11, characterized in that: The annular airbag is connected to an automatic inflation system and is equipped with a pressure sensor to automatically adjust the inflation degree of the airbag according to real-time ocean pressure changes.

13. The tidal current power station structure according to claim 1, characterized in that: The tidal current energy motor assembly (6) comprises a nacelle (61), blades (62) and a turbine guide frame (63); the turbine guide frame (63) is fixedly arranged in a vertical direction between the support platform (3) and the working platform (5).

14. The tidal current power station structure according to claim 1, characterized in that: The surface of the steel casing (2) is coated with an anti-corrosion coating to improve durability in a marine environment.

15. The tidal current power station structure according to claim 2 or 3, characterized in that: The pile foundation (1) is provided with a reinforcing steel mesh in concrete.

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