Tidal power plant structure

Abstract

The present application relates to a kind of tidal current power station structures, including pile foundation, steel casing, pile cap, column, work platform and tidal current power machine assembly, the outer side of the pile foundation is equipped with steel casing, the pile foundation uses single or multiple piles, the lower end of the pile foundation is embedded in seabed rock layer, the lower end of the pile foundation and steel casing are below sea bed stratum plane, the upper end of the pile foundation and steel casing is inserted into pile cap and forms integral structure, the upper side of the pile cap is provided with column respectively, the tidal current power machine assembly is placed on the pile cap and located between the column of two sides, the column is used to support tidal current power machine assembly and enhance the stability of integral structure, the top of the column is provided with work platform, and the work platform is above sea level.The present application meets the strict requirements of tidal current power machine installation, and significantly improves the service life of tidal current power station integral structure.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of tidal current energy power generation, and particularly relates to a tidal current energy power station structure. BACKGROUND

[0002] As a cutting-edge new energy technology, tidal current energy power generation technology has been widely concerned in the world, and has become one of the world's leading technologies in the field of new energy in China. At present, the LHD marine tidal current energy power generation project is the only equipment in the world that realizes megawatt-level continuous power generation and grid operation, and maintains stable operation throughout the four seasons. The first, second and third phases of the LHD marine tidal current energy power generation use steel jacket as the motor assembly platform. This design has certain advantages in ensuring equipment installation and operation, and provides necessary structural support and rigid foundation for the entire system.

[0003] However, the use of steel jacket has exposed many deficiencies in practical application. First, the steel jacket is easily corroded and fatigued in the harsh marine environment, and its overall service life is relatively short. Second, its structure form has obvious deficiencies in bending and shear bearing capacity when bearing the large load generated by the tidal current energy motor, and it is difficult to meet the high requirements of the tidal current energy motor on 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, thereby limiting its wide application in more demanding marine environments. These problems seriously restrict the promotion and long-term stable operation of tidal current energy power stations to deep water areas. SUMMARY

[0004] In view of the defects of insufficient durability and limited structural bearing capacity in the prior art, the present application provides a tidal current energy power station structure, which aims to meet the strict requirements of tidal current energy motor installation and significantly improve the service life of the overall structure of the tidal current energy power station.

[0005] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0006] A tidal current energy power station structure, comprising a pile foundation, a steel casing, a pile cap, a column, a working platform and a tidal current energy motor assembly, the outer side of the pile foundation is sleeved with a steel casing, the pile foundation uses 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 located below the seabed stratum plane, the pile foundation and the upper end of the steel casing together insert the pile cap to form an integral structure, the pile cap is provided with a column on each side above, the tidal current energy motor assembly is placed on the pile cap and located between the columns on both sides, the column is used to support the tidal current energy motor assembly and enhance the stability of the integral structure, and the working platform is provided on the top of the column and located above the sea level.

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

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

[0009] Preferably, a plurality of detachable horizontal connecting 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 layer, and the steel casing is used to drill a hole in the seabed rock layer to the designed elevation to complete the concrete pouring of the pile foundation.

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

[0012] Preferably, the pile cap is circular or streamlined or other planar shape to reduce the loss of tidal current energy.

[0013] Preferably, the column is semicircular or streamlined or other planar shape to reduce the loss of tidal current energy.

[0014] Preferably, the pile cap can be a concrete solid or hollow structure.

[0015] Preferably, the lower side of the pile cap is provided with a steel sleeve, and the steel sleeve is sleeved outside the steel casing.

[0016] Preferably, the steel sleeve realizes accurate butt joint of the pile foundation and the pile cap during construction, and an annular air bag is arranged between the steel casing and the steel sleeve. The annular air bag forms a closed water blocking system, which can prevent seawater from penetrating into the pile cap during construction.

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

[0018] Preferably, the tidal current energy motor assembly includes a cabin, blades and a water turbine jacket, and the water turbine jacket is fixedly arranged in a vertical direction between the pile cap and the working platform.

[0019] Preferably, the surface of the steel casing is coated with an anti-corrosion coating to improve the durability in the 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 power station structure of the present application are as follows: firstly, the main structure of the power station is in the form of a concrete structure, which fully utilizes the economy of concrete and also utilizes the excellent corrosion resistance and aging resistance of the concrete structure compared with the steel structure, thereby significantly prolonging the service life of the overall structure; secondly, the pile foundation is in the form of a steel-concrete composite pile foundation, a steel casing is arranged outside the concrete pile foundation, the steel casing can meet the construction requirements of the pile foundation, and after the pile foundation is formed, the steel casing can form a steel-concrete composite structure together with the pile foundation to participate in the stress of the structure, thereby effectively enhancing the bending resistance and shear resistance of the structure, and even in a harsh marine environment, the steel-concrete composite structure can also guarantee high bearing capacity and structural safety; in addition, a plurality of detachable transverse connecting systems are arranged between the columns in the structure, which further improves the wave resistance between the columns, so that the entire power station can remain stable when subjected to wave impact, thereby ensuring long-term safe operation of the equipment; finally, the structure is designed reasonably, 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 popularization and application of the marine tidal current power generation technology. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural elevation view of the tidal current power station structure of the embodiment of the present application;

[0023] Figure 2 is a structural plan view of the tidal current power station structure of the embodiment of the present application.

[0024] The reference signs are as follows: 1-pile foundation; 2-steel casing; 3-pile cap; 4-column; 5-working platform; 6-tidal current motor assembly; 61-motor cabin; 62-blade; 63-water turbine guide pipe frame; 7-transverse connecting system; 8-steel sleeve. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all the embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application belong to the present application.

[0026] In addition, the described features, structures or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, many specific details are provided to give a sufficient understanding of the embodiments of the present application. However, those skilled in the art will realize that the technical solutions of the present application can be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. can be used. In other cases, well-known methods, devices, implementations or operations are not shown or described in detail to avoid obscuring the aspects of the present application.

[0027] like Figure 1 As shown in the figure, this embodiment discloses a tidal power station structure, including a pile foundation 1, a steel casing 2, a pile cap 3, columns 4, a working platform 5, and a tidal power generator assembly 6. The pile foundation 1 is composed of single or multiple piles, with a steel casing 2 fitted around its outer side. This design enhances the overall structure's bending and shear resistance as well as its resistance to seawater erosion. The lower end of the pile foundation 1 is embedded in the seabed rock layer. This embedding method allows the structure to be firmly fixed to the seabed, thereby improving overall stability. Simultaneously, the lower ends of both the pile foundation 1 and the steel casing 2 are located below the seabed stratum to a certain design depth, which helps resist the influence of seabed water pressure and external unstable factors. The upper ends of the pile foundation 1 and the steel casing 2 are inserted together into the pile cap 3. The pile cap 3 serves as both a load-bearing platform for the generator unit and plays a crucial role in connecting the lower foundation and the upper structure, forming a stable overall structural system. On either side of the upper part of the pier 3, columns 4 are respectively installed. These columns 4 not only support the tidal current generator assembly 6, but also enhance the lateral stability of the structure and resist waves. The tidal current generator assembly 6 is placed entirely on the pier 3 and located between the two columns 4. This reasonable arrangement ensures that the generator assembly has a good balance and reliability during operation. A working platform 5 is set on the top of the columns 4. The working platform 5 is located above sea level, providing a convenient and reliable operating space for the daily inspection and maintenance of the equipment.

[0028] In this embodiment, the use of steel casing 2 in the construction process simplifies the construction process, especially suitable for working conditions in water depths of 50 to 60 meters. This is because, during deep-water operations, steel casing 2 can serve as a concrete pouring channel and as a guide and positioning element during the subsequent pouring of the superstructure, effectively ensuring the accuracy and continuity of the pouring process. At the same time, steel casing 2 acts as a temporary construction facility during construction, making the construction operation simpler and more efficient. After the pile foundation is formed, it is used as a composite structural load-bearing element. By forming a composite load-bearing system with the concrete pile foundation 1, steel casing 2 not only improves the bending and shear resistance of the entire structure, but also significantly enhances the resistance of the concrete structure to seawater erosion and wave impact in a marine environment, thereby greatly improving the load-bearing performance and durability of the entire concrete structure.

[0029] In one embodiment, the pile foundation 1, the pile cap 3, and the column 4 are all concrete structures. This choice of structural material fully utilizes the corrosion resistance and long service life of concrete, ensuring the long-term stable operation of the entire power station structure in a marine environment. While the pile foundation 1 is made of concrete, in another embodiment, the pile foundation 1 is made of concrete, while the pile cap 3 and column 4 are made of steel. This combination leverages the durability of concrete while utilizing the high strength of steel to enhance the overall load-bearing capacity of the structure.

[0030] In some embodiments, the column 4 is cast in situ by cast-in-place method, which realizes seamless connection with the pile cap 3 and improves the overall seismic and durability performance. In other embodiments, if the floating crane for prefabricating the pile cap 3 has sufficient carrying capacity, the pile cap 3 and the column 4 can be prefabricated as an integrated component, 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, reduces the difficulty of on-site construction, and improves the assembly efficiency and operation stability of the overall structure of the tidal current power station.

[0031] Further, a plurality of detachable transverse connection systems 7 are arranged between the columns 4 from top to bottom. This design helps to evenly disperse the transverse load generated under the action of waves, and facilitates replacement or adjustment during maintenance to enhance the wave resistance of the structure. During construction, the lower end of the steel casing 2 is embedded in the seabed rock layer. By drilling a hole in the seabed rock layer to the designed elevation using the steel casing 2, the concrete pouring of the pile foundation 1 is completed, thereby ensuring the accuracy of the pouring process and the close combination between the concrete and the steel casing. The top end of the steel casing 2 is flush with the top end 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 that of the lower end of the pile foundation 1. This not only ensures that the steel casing 2 plays a reinforcing and protective role in the overall structure, but also enables the pile foundation 1 to be embedded more deeply into the seabed rock layer to improve the overall carrying capacity and stability. The embedding depth of the steel casing 2 in the rock layer is the most unfavorable position determined by force calculation. This depth parameter is obtained through detailed force analysis to ensure that the steel casing 2 can play the best reinforcing role under the most severe working conditions, thereby realizing the optimal force performance of the entire steel-concrete composite pile structure.

[0032] The pile foundation 1 is a circular or streamlined or other planar shape that can reduce the loss of tidal current energy. This design helps to optimize the fluid dynamics performance and reduce the resistance of the structure to fluid flow, thereby reducing energy loss and improving the utilization efficiency of tidal current energy. The pile foundation 1 is a solid or hollow structure, which allows for a balance between load-carrying capacity and weight according to engineering requirements. The solid structure provides higher load-carrying capacity, while the hollow structure helps to reduce weight and facilitate construction. The lower side of the pile foundation 1 is provided with a steel sleeve 8, which is sleeved outside the steel casing 2. This structural design ensures the precise butt joint between the pile foundation 1 and the steel casing 2, effectively promoting the mechanical transmission between the lower foundation and the upper structure. The steel sleeve 8 realizes the accurate butt joint of the pile foundation 1 and the pile cap 3 during construction, and an annular air bag is arranged between the steel casing 2 and the steel sleeve 8. The annular air bag forms a closed water-blocking system when inflated. During construction, it can prevent seawater from entering the pile cap 3, thereby ensuring the stability of the concrete pouring environment and the construction quality, providing conditions for subsequent construction. The annular air bag is connected to an automatic inflation system and is equipped with a pressure sensor. According to the real-time change of ocean pressure, the inflation degree of the air bag is automatically adjusted. This automatic adjustment function ensures that the water-blocking system remains closed under different sea conditions, effectively responding to changes in ocean pressure.

[0033] The tidal current power machine assembly 6 includes a cabin 61, a blade 62, and a water turbine guide frame 63. The water turbine guide frame 63 is fixedly arranged between the pile cap 3 and the working platform 5. This arrangement not only ensures the stable support of the machine assembly 6 during operation, but also helps to realize precise installation and efficient operation of the equipment. At the same time, it utilizes the kinetic energy of sea flow to realize energy conversion. When seawater flows, it pushes the blade 62 to rotate. The blade 62 can fully capture and convert the kinetic energy of the sea flow. The water turbine guide frame 63 stably transmits the rotation of the blade 62 to the generator in the cabin 61, and then converts mechanical energy into electrical energy, forming an efficient tidal current power generation system. This power generation principle fully utilizes the natural energy of ocean tides and water flow, 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 marine environments. The anti-corrosion coating can effectively prolong the service life of the steel casing 2 and reduce maintenance costs. The pile foundation 1 is provided with a reinforcing steel mesh in the concrete. The reinforcing steel mesh makes the pile foundation 1 have higher compressive strength and crack resistance, thereby improving the stability and safety of the structure as a whole.

[0035] In summary, the application discloses a tidal current power station structure, comprising a pile foundation 1, a steel casing 2, a bearing platform 3, a stand column 4, a working platform 5 and a tidal current power machine assembly 6, by adopting the combination of concrete and steel, the steel casing 2 is sleeved outside the pile foundation 1, and the upper ends of the pile foundation 1 and the steel casing 2 are inserted into the bearing platform 3 to form an integral structure, further, the stand column 4 is arranged on the two sides of the bearing platform 3 to support the tidal current power machine assembly 6, and the working platform 5 is arranged on the top of the stand column 4, which provides a convenient platform for equipment maintenance and repair during the later operation period. The tidal current power station structure utilizes the lower end of the pile foundation 1 embedded into the seabed rock layer and the closed water resistance system formed by the cooperation of the steel casing 2 and the steel sleeve 8 and the annular air bag, which not only improves the bending resistance, shear bearing capacity and seawater corrosion resistance of the overall structure, but also ensures long-term stable operation in complex marine environment. The application not only improves the problems of insufficient structural stability and durability in the prior art, but also provides an innovative solution with compact structure and economic practicability for tidal current power generation, which has important significance for promoting the wide application and industrial development of marine new energy technology.

[0036] The above examples are only used to illustrate the technical solutions of the application, but not limit it; under the idea of the application, the technical features in the above examples or different examples can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the application as described above, which are not provided in details for simplicity; although the application is described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application.

Claims

1. A tidal power plant structure, characterized in that, The utility model relates to a tidal current energy generator, which comprises a pile foundation (1), a steel casing (2), a pile cap (3), a column (4), a working platform (5) and a tidal current energy motor assembly (6). The pile foundation (1) is sleeved with the steel casing (2) on the outside. The pile foundation (1) is made of a single pile or multiple piles. The lower end of the pile foundation (1) is embedded in the seabed rock layer. The lower end of the pile foundation (1) and the lower end of the steel casing (2) are both below the seabed stratum plane. The upper end of the pile foundation (1) is inserted into the pile cap (3) together with the upper end of the steel casing (2) to form an integral structure. Two columns (4) are arranged on the upper side of the pile cap (3) respectively. The tidal current energy motor assembly (6) is placed on the pile cap (3) and located between the two columns (4). The columns (4) are used for supporting the tidal current energy motor assembly (6) and enhancing the stability of the integral structure. The top of the column (4) is provided with a working platform (5), which is located above the sea level. The tidal current energy motor assembly (6) comprises a cabin (61), a blade (62) and a water turbine guide pipe support (63). The water turbine guide pipe support (63) is fixedly arranged in the vertical direction between the pile cap (3) and the working platform (5). The blade (62) is located on the outside of the pile cap (3) and can fully capture and convert the kinetic energy of the sea current. The lower end of the steel casing (2) is embedded in the seabed rock layer. The steel casing (2) is used for drilling a hole in the seabed rock layer to the designed elevation to complete the concrete pouring of the pile foundation (1). The top end of the steel casing (2) is flush with the top end 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. The embedding depth of the steel casing (2) in the rock layer is the most unfavorable position determined according to the stress calculation.

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

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

4. A tidal power plant structure according to claim 2 or 3, characterised in that, A plurality of detachable transverse connecting systems (7) are arranged between the two columns (4) from top to bottom to increase the wave resistance between the columns (4).

5. The tidal current power plant structure according to claim 1, characterized in that, The pile cap (3) is circular or streamlined or other planar shape, which can reduce the loss of tidal current energy.

6. The tidal current power plant structure according to claim 1, characterized in that, The column (4) is semicircular or streamlined or other planar shape, which can reduce the loss of tidal current energy.

7. The tidal current power plant structure according to claim 1, characterized in that, The pile cap (3) can be a concrete solid or hollow structure.

8. A tidal power plant structure according to claim 7, characterised in that, A steel sleeve (8) is arranged on the lower side of the pile cap (3). The steel sleeve (8) is sleeved on the outside of the steel casing (2).

9. A tidal power plant structure according to claim 8, characterised in that, The steel sleeve (8) realizes the accurate butt joint of the pile foundation (1) and the pile cap (3) during the construction process. An annular air bag is arranged between the steel casing (2) and the steel sleeve (8). The annular air bag forms a closed water-blocking system after inflation. The annular air bag can prevent seawater from penetrating into the pile cap (3) during the construction process.

10. A tidal power plant structure according to claim 9, characterised in that, The annular air bag is connected with an automatic inflation system and is equipped with a pressure sensor. The inflation degree of the annular air bag is automatically adjusted according to the real-time ocean pressure change.

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

12. A tidal power plant structure according to claim 2 or 3, characterised in that, The pile foundation (1) is provided with a reinforcing steel mesh in the concrete.

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