A marine photovoltaic foundation device and power generation system

Abstract

This invention relates to the field of offshore power generation technology, and discloses an offshore photovoltaic (PV) foundation and power generation system. The offshore PV foundation includes: a support pile, which is anchored in the seabed and whose top supports PV modules; and a counterweight, which is fixed to the lower part of the support pile and has a liquid tank inside for containing liquid. When the support pile is subjected to dynamic loads, the liquid in the tank sloshes, generating a damping effect to reduce the vibration amplitude of the support pile. When the support pile is subjected to dynamic loads such as wind loads, seawater wave forces, and ocean current forces, the dynamic loads are transmitted to the counterweight, and the liquid contained in the tank inside the counterweight sloshes accordingly. Through friction and impact between the liquid and the tank wall, as well as vortex and turbulent motion within the liquid, a large amount of vibration energy is dissipated, thereby generating a significant damping effect. This effectively reduces the vibration amplitude of the support pile, enhances the support pile's adaptability to dynamic loads, and improves the service life of the support pile.

Description

Technical Field

[0001] This invention relates to the field of offshore power generation technology, and in particular to an offshore photovoltaic infrastructure and power generation system. Background Technology

[0002] Offshore photovoltaics, as a new form of green energy development, has become an important development direction in the field of renewable energy. Due to its strong adaptability to water depth, large-span offshore photovoltaic platforms have become the mainstream structural form. In order to ensure the stability of photovoltaic modules in large-span offshore photovoltaic platforms, multiple foundation piles need to be set at intervals in the sea to support the upper platform structure. At present, these foundation piles mainly adopt steel pipe piles driven into the seabed. For example, patent document with publication number CN120925525A discloses an anti-sinking device for offshore photovoltaic foundations. The device includes an anti-sinking part and a conical rubber liner. The anti-sinking part is plate-shaped and has a reserved interface through the middle of the upper surface. The conical rubber liner surrounds the surface of the foundation pile, and the foundation pile is inserted into the reserved interface and fixed by the conical rubber liner.

[0003] However, in addition to static loads, offshore photovoltaic (PV) foundations also bear complex dynamic loads over long periods. These dynamic loads mainly come from two sources: wind loads above the sea surface and wave and current forces from the seawater itself. These periodic environmental forces cause continuous vibration of the foundation piles. The core function of the anti-settlement components in existing offshore PV foundation anti-settlement devices is static anti-settlement, which cannot effectively resist the complex dynamic loads borne by the offshore PV foundation. In long-term operation, the foundation piles still face problems such as structural fatigue damage and loosening of connections due to excessive vibration amplitude. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the anti-sinking part in the existing marine photovoltaic foundation anti-sinking device cannot effectively resist the complex dynamic loads borne by the marine photovoltaic foundation. In long-term operation, the foundation piles still face problems such as structural fatigue damage and loosening of connections caused by excessive vibration amplitude.

[0005] To address the aforementioned technical problems, the present invention provides a marine photovoltaic infrastructure, comprising: Support piles are used to anchor the photovoltaic modules in the seabed. The top of the support pile is used to support the photovoltaic modules. The support pile has a cavity inside. The counterweight is fixed to the lower part of the support pile. The counterweight has a liquid tank inside for containing liquid and a passage for the support pile to pass through. The injection pipeline is located inside the pipe cavity and connected to the support pile. The injection pipeline has an inlet branch pipe and an outlet branch pipe that are interconnected. The inlet branch pipe is connected to an external water source, and the outlet branch pipe passes through the pipe cavity and is connected to the liquid tank. When the support pile is subjected to dynamic load, the liquid sloshing in the liquid tank generates a damping effect to reduce the vibration amplitude of the support pile.

[0006] Preferably, the counterweight is a frustum-shaped shell, and the insertion channel is located in the middle of the frustum-shaped shell.

[0007] Preferably, the longitudinal distance between the frustum-shaped shell and the bottom of the support pile is 4m to 5m, and the bottom wall of the frustum-shaped shell is used to fit against the seabed surface.

[0008] Preferably, the frustum-shaped shell is provided with an annular partition plate. The bottom of the annular partition plate is connected to the bottom wall of the frustum-shaped shell, and there is a gap between the top of the annular partition plate and the top wall of the frustum-shaped shell, so that the inner and outer annular spaces separated by the annular partition plate are interconnected at the top.

[0009] Preferably, the frustum-shaped shell is further provided with multiple circumferentially spaced stiffening plates.

[0010] Preferably, the injection pipeline also includes a ring branch pipe; The inlet end of the liquid inlet branch pipe is located at or above the top of the support pile; The annular branch pipe is connected to the outlet end of the inlet branch pipe; Multiple liquid outlet branches are provided, and each liquid outlet branch is distributed at intervals along the circumference of the annular branch. The inlet end of each liquid outlet branch is connected to the annular branch, and the outlet end extends into the liquid tank through the corresponding through holes provided on the support pile and the counterweight.

[0011] Preferably, the volume of liquid injected into the injection pipeline accounts for 60% to 80% of the total volume of the liquid tank.

[0012] Preferably, the upper surface of the counterweight is provided with multiple mounting portions spaced circumferentially.

[0013] The present invention also provides an offshore photovoltaic infrastructure, comprising: Support piles are used to anchor the photovoltaic modules in the seabed, and the top of the support piles is used to support the photovoltaic modules. The counterweight is fixed to the lower part of the support pile, and the interior of the counterweight has a liquid tank for containing liquid. When the support pile is subjected to dynamic load, the liquid sloshing in the liquid tank generates a damping effect to reduce the vibration amplitude of the support pile.

[0014] The present invention also provides an offshore photovoltaic power generation system, including the above-mentioned offshore photovoltaic foundation device, wherein a support platform is provided on the top of the support piles in the offshore photovoltaic foundation device, and photovoltaic modules are installed on the support platform.

[0015] Compared with existing technologies, the offshore photovoltaic infrastructure of this invention has the following advantages: In this embodiment of the invention, the photovoltaic modules on the upper part of the support pile bearing component of the offshore photovoltaic foundation device are fixed to the counterweight part at the lower part of the support pile, which contains liquid. This significantly increases the overall mass and overturning stability of the support pile through its own weight. When the support pile is subjected to dynamic loads such as wind loads, seawater wave forces, and ocean current forces, the dynamic loads are transmitted to the counterweight part, and the liquid contained in the liquid tank inside the counterweight part sloshes. Through the friction and impact between the liquid and the tank wall, as well as the vortex and turbulence inside the liquid, a large amount of vibration energy is dissipated, thereby generating a significant damping effect. This can effectively reduce the vibration amplitude of the support pile, enhance the support pile's adaptability to dynamic loads, and improve the service life of the support pile. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the marine photovoltaic foundation device anchored in the seabed according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the overall structure of the offshore photovoltaic infrastructure provided in an embodiment of the present invention; Figure 3 This is an exploded structural diagram of the offshore photovoltaic infrastructure provided in an embodiment of the present invention; Figure 4 This is a first-view overall structural diagram of the portion of the offshore photovoltaic foundation device located above the counterweight provided in an embodiment of the present invention; Figure 5 This is a second-view overall structural diagram of the portion of the offshore photovoltaic foundation device located above the counterweight provided in an embodiment of the present invention; Figure 6 This is a cross-sectional structural diagram of the counterweight section in the offshore photovoltaic foundation device provided in an embodiment of the present invention (the top mounting section is not shown). Figure 7 This is a top view of the counterweight section in the offshore photovoltaic foundation device provided in the embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the mounting part on top of the counterweight in the offshore photovoltaic foundation device provided in the embodiment of the present invention.

[0017] In the diagram, 1. Support pile; 2. Counterweight; 20. Body; 21. Liquid tank; 22. Installation channel; 23. Annular compartment plate; 24. Stiffening plate; 25. Installation part; 3. Liquid injection pipeline; 31. Liquid inlet branch pipe; 32. Annular branch pipe; 33. Liquid outlet branch pipe; 4. Support platform; 5. Photovoltaic module. Detailed Implementation

[0018] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0019] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] It should be understood that the terms "first," "second," etc., are used in this invention to describe various types of information, but these terms are not limited to them; they are only used to distinguish information of the same type from one another. For example, without departing from the scope of this invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] like Figures 1 to 5 As shown, a preferred embodiment of the present invention provides an offshore photovoltaic infrastructure, comprising: Support pile 1 is used to anchor in the seabed, and the top of support pile 1 is used to support photovoltaic module 5; The counterweight 2 is fixed to the lower part of the support pile 1, and the interior of the counterweight 2 has a liquid tank 21 for containing liquid. When the support pile 1 is subjected to dynamic load, the liquid sloshing in the liquid tank 21 generates a damping effect to reduce the vibration amplitude of the support pile 1.

[0023] In this embodiment of the invention, the photovoltaic module 5 on the upper part of the support pile 1 of the offshore photovoltaic foundation device is fixed to the counterweight 2 at the lower part of the support pile 1, which contains liquid. This significantly increases the overall mass and overturning stability of the support pile 1 through its own weight. Furthermore, when the support pile 1 is subjected to dynamic loads such as wind loads, seawater wave forces, and ocean current forces, the dynamic loads are transmitted to the counterweight 2. The liquid contained in the liquid tank 21 inside the counterweight 2 sloshes, dissipating a large amount of vibration energy through friction and impact between the liquid and the tank wall, as well as vortex and turbulent motion within the liquid. This generates a significant damping effect, effectively reducing the vibration amplitude of the support pile 1, enhancing its adaptability to dynamic loads, and improving its service life. Specifically, such as Figures 1 to 6 As shown, the counterweight 2 is a frustum-shaped shell, and the middle of the frustum-shaped shell is provided with a through-hole 22 for the support pile 1 to pass through; the outer wall of the frustum-shaped shell is a smooth and tapering curved surface, which can guide the ocean current to smoothly bypass and reduce the scouring energy.

[0024] Specifically, the inner wall of the fitting channel 22 is welded and fixed to the outer wall of the support pile 1.

[0025] Specifically, the longitudinal distance between the frustum-shaped shell and the bottom of the support pile 1 is 4m to 5m, and the bottom wall of the frustum-shaped shell is used to support the seabed surface.

[0026] Traditional offshore photovoltaic (PV) foundations typically require driving support piles into the bearing strata, such as sand or weathered rock, below the seabed to obtain sufficient anchoring force. To reduce the difficulty of pile driving, slender steel pipe piles with small diameters are often used. However, even with slender steel pipe piles, the construction process of driving them into deep bearing strata remains lengthy. Furthermore, in deep soft soil geology, the seabed cannot provide effective bearing capacity, necessitating the use of ultra-large diameter pipes to improve bearing capacity. In areas with shallow overburden or isolated boulders, steel pipe piles are difficult to drive smoothly into the seabed, leading to adjustments in the turbine location or complex rock-embedding operations, thus limiting the flexibility and economy of the project.

[0027] In this embodiment of the invention, the longitudinal distance between the frustum-shaped shell and the bottom of the support pile 1 is set to 4m to 5m, which effectively limits the penetration depth of the support pile 1. Based on the structural characteristics of the frustum-shaped shell, which is small at the top and large at the bottom, the wide bottom surface of the frustum-shaped shell can directly bear the seabed, thereby providing the main vertical bearing capacity and anti-overturning moment for the support pile 1. Furthermore, the support pile 1 only needs to penetrate to a depth of 4m to 5m below the seabed surface, without needing to enter the deep bearing layer. This shallow-buried design allows the pile driving operation to be completed quickly by static pressure without hammering, significantly shortening the construction period and reducing disturbance to the marine environment. It can adapt to complex geological conditions such as shallow overburden, isolated rock areas, or deep soft soil foundations, improving construction efficiency and engineering economy.

[0028] Specifically, such as Figure 3 , Figure 5 and Figure 6 As shown, an annular compartment plate 23 is provided inside the frustum-shaped shell. The bottom of the annular compartment plate 23 is connected to the bottom wall of the frustum-shaped shell, and there is a gap between the top of the annular compartment plate 23 and the top wall of the frustum-shaped shell, so that the inner and outer annular spaces separated by the annular compartment plate 23 are interconnected at the top.

[0029] The annular compartment plate 23 divides the liquid tank 21 into two annular spaces, an inner and an outer one. The gap at the top allows the two spaces to be interconnected. When the support pile 1 is excited by wave force or wind load, the liquid in the inner and outer annular spaces has different natural vibration frequencies due to the difference in geometric dimensions. The liquid generates complex phase difference flow and eddy collisions at different frequencies, which significantly enhances the energy dissipation efficiency. Furthermore, the tops of the inner and outer annular spaces are interconnected, and liquid can be injected into the two annular spaces by setting a single water injection structure, without the need to set separate water injection structures for the inner and outer annular spaces. In addition, the annular compartment plate 23 also forms an internal reinforcing component of the frustum-shaped shell, which improves the overall rigidity of the frustum-shaped shell.

[0030] Specifically, such as Figure 3 , Figure 5 and Figure 6 As shown, the frustum-shaped shell is also provided with multiple circumferentially spaced stiffening plates 24. The stiffening plates 24 also form internal reinforcing components of the frustum-shaped shell, which, together with the annular compartment plate 23, greatly enhance the structural rigidity of the frustum-shaped shell against external water pressure and internal liquid sloshing.

[0031] Specifically, the projection of the liquid tank 21 on the radial section is triangular, and the cross-section of the stiffening plate 24 is also triangular. The three sides of the triangular stiffening plate 24 are fixedly connected to the outer wall of the insertion channel 22, the bottom wall of the frustum-shaped shell, and the top wall of the frustum-shaped shell, respectively.

[0032] Specifically, each triangular stiffening plate 24 has a notch on its bottom edge to avoid the annular compartment plate 23, and the bottom of the annular compartment plate 23 is fixedly connected to the bottom wall of the frustum-shaped shell.

[0033] Specifically, the three sides of the triangular stiffening plate 24 are welded and fixed to the outer wall of the insertion channel 22, the bottom wall of the frustum-shaped shell, and the top wall of the frustum-shaped shell, respectively. The annular compartment plate 23 passes through the notch on the bottom edge of each triangular stiffening plate 24 and is welded and fixed to the bottom wall of the frustum-shaped shell. The annular compartment plate 23 is also welded and fixed to the edge of each notch, thereby improving the overall rigidity of the frustum-shaped shell.

[0034] Specifically, the support pile has a cavity, and the offshore photovoltaic foundation device also includes an injection pipeline 3. The injection pipeline 3 is located in the cavity and is fixedly connected to the support pile 1. One end of the injection pipeline 3 is connected to the liquid tank 21, and the other end extends to the top or above the support pile 1. The support pile 1 and the counterweight 2 are provided with through holes for the injection pipeline 3 to pass through.

[0035] The injection pipeline 3 is built into the support pile 1, effectively avoiding potential collisions, wear, or marine organism attachment to external pipelines during construction, hoisting, and sinking, thus improving the long-term reliability of the system. It also simplifies external wiring, making the overall structure more concise and robust. Secondly, one end of the pipeline connects to the liquid tank 21, and the other end extends above the top of the support pile 1, creating an injection interface that can be easily accessed from above sea level. This allows for safe and efficient injection of the liquid tank 21 after the support pile 1 is installed, eliminating the need for diving operations or complex underwater connections, reducing construction difficulty, risk, and cost. The injection pipeline 3 passes through the support pile 1 and corresponding through holes on the counterweight 2 to ensure normal injection into the liquid tank 21.

[0036] Specifically, such as Figures 1 to 3 As shown, the injection line 3 includes: The inlet branch pipe 31 has its inlet end located at the top or above the support pile 1 and is connected to an external water source. The annular branch pipe 32 is connected to the outlet end of the liquid inlet branch pipe 31; Multiple liquid outlet branches 33 are distributed circumferentially along the annular branch 32. The inlet end of each liquid outlet branch 33 is connected to the annular branch 32, and the outlet end extends through the corresponding through holes on the support pile 1 and the counterweight 2 into the liquid tank 21, so that each liquid outlet branch 33 passes through the pipe cavity and connects with the liquid tank 21.

[0037] The injection line 3 quickly and evenly distributes the injected liquid to various areas of the liquid tank 21, avoiding the problem of uneven injection that may be caused by a single injection port.

[0038] Specifically, the inlet branch pipe 31 is vertically spaced with multiple mounting brackets (not shown in the figure), which are fixed to the inner wall of the support pile 1. By fixing the inlet branch pipe 31, the injection pipeline 3 is thus fixed inside the support pile 1, preventing the injection pipeline 3 from shifting or colliding with the inner wall of the pile during hoisting or pile driving; it can also effectively restrain the swaying of the injection pipeline 3 in complex marine dynamic environments during operation.

[0039] Specifically, the inner walls of the through holes on the support pile 1 and the counterweight 2 are provided with sealing grooves for installing sealing rings. After the liquid outlet branch pipe 33 passes through the through holes on the support pile 1 and the counterweight 2, sealing rings are installed in the sealing grooves respectively to ensure effective sealing of the liquid tank 21 and prevent the liquid in the liquid tank 21 from leaking along the assembly gap between the outer wall of the liquid outlet branch pipe 33 and the inner wall of the through hole.

[0040] Specifically, the volume of liquid injected through the injection line 3 accounts for 60% to 80% of the total volume of the liquid tank 21. This ensures that the liquid tank 21 simultaneously maintains sufficient liquid mass and necessary air space. The liquid mass provides significant inertial force, which is the material basis for generating the damping effect; while the reserved 20% to 40% air space provides the necessary volume for the liquid to slosh freely under dynamic loads, enabling it to efficiently dissipate vibration energy through sloshing friction, impact, and vortex turbulence.

[0041] Specifically, such as Figure 4 , Figure 5 and Figure 7 As shown, the upper surface of the counterweight 2 is provided with multiple mounting parts 25 spaced circumferentially. These multiple mounting parts 25, arranged circumferentially, form a standardized, multi-functional expansion interface array on the upper surface of the counterweight 2. This transforms the originally single-function basic structure into an open integrated platform, allowing for the flexible and convenient addition of various functional modules, such as aquaculture cages, ecological restoration facilities, or monitoring equipment, after the foundation is in place, according to needs.

[0042] Specifically, such as Figure 8 As shown, each mounting part 25 is a T-shaped track extending radially along the upper surface of the counterweight part 2, and the bottom of each T-shaped track is welded and fixed to the counterweight part 2.

[0043] Therefore, T-shaped slots can be installed at the bottom of various functional modules such as aquaculture cages, ecological restoration facilities, or monitoring equipment to securely mount them on T-shaped rails, making the installation of various auxiliary modules more secure and convenient. Furthermore, the T-shaped guide rails, which are evenly arranged radially, act as reinforcing ribs, significantly enhancing the local rigidity and overall integrity of the upper shell of the counterweight 2, thus simultaneously achieving the dual goals of structural strengthening and functional expansion.

[0044] Specifically, the bottom of the counterweight 2 is equipped with a drain port that communicates with the liquid tank 21. When the equipment reaches the end of its service life or needs maintenance, the liquid is drained to reduce weight and facilitate hoisting or dismantling.

[0045] like Figure 1 As shown, this embodiment of the invention also provides an offshore photovoltaic power generation system, including the above-mentioned offshore photovoltaic foundation device. The support pile 1 in the offshore photovoltaic foundation device is provided with a support platform 4 on top, and photovoltaic modules 5 are installed on the support platform 4.

[0046] Specifically, the support platform 4 is a steel truss structure composed of round tubes, thin-walled channel steel and connecting plates. The bottom of the steel truss structure is welded and fixed to the top of the support pile 1. Purlins are arranged on the steel truss structure according to the installation width of the photovoltaic module 5. The photovoltaic module 5 is installed on the purlins by means of pressure block connection, which simplifies the installation process. The upper support platform 4 can be hoisted separately as a whole after the foundation construction of the support pile 1 is completed, or it can be connected with the foundation of the support pile 1 and sunk together as a whole.

[0047] The working process of this invention is as follows: The initial assembly of each component is completed in the onshore prefabrication plant. The support pile 1 and the counterweight 2 are prefabricated independently. The triangular stiffening plate 24 and the annular compartment plate 23 are welded and fixed inside the counterweight 2 to form two annular spaces. The inlet branch pipe 31 of the injection pipeline 3 is fixed to the inner wall of the support pile 1 by the mounting bracket. The upper surface of the counterweight 2 is radially welded with a T-shaped rail as the mounting part 25. The support platform 4 can be prefabricated separately. Depending on the construction conditions, the support platform 4 can be pre-connected to the support pile 1.

[0048] Precast components are transported to the designated sea area coordinates and lifted as a whole using hoisting equipment. Support pile 1 is driven into the soft soil layer of the seabed using a static pressure method, controlling the penetration depth to 4-5m, while ensuring the bottom wall of the frustum-shaped shell is stably supported on the seabed surface. Since it does not require penetrating deep into the bearing layer, this process eliminates the need for hammering, significantly shortening the construction period and reducing disturbance to the marine environment. After the foundation positioning is completed, seawater is injected through the inlet pipe 31 at the top of support pile 1. Water flows along the pipeline system built into the support pile 1, and is evenly distributed to multiple circumferentially distributed liquid outlet branches 33 via the annular branch pipe 32. It is injected from multiple points at the bottom of the liquid tank 21, and the liquid volume is precisely controlled at 60%-80% of the total volume of the liquid tank 21. During operation, the photovoltaic module 5 operates normally on the support platform 4, converting solar energy into electrical energy. When subjected to wind load, wave force, or ocean current force, the vibration of the support pile 1 is transmitted to the counterweight 2, and the liquid in the liquid tank 21 sloshes and generates a damping effect. The inner and outer annular spaces form different vibration frequencies due to the difference in geometric dimensions, and the liquid generates phase difference flow and eddy collision, which efficiently dissipates vibration energy. Through the T-shaped track on the upper surface of the counterweight 2, modules such as aquaculture cages, ecological restoration facilities, or observation equipment can be flexibly installed. When the equipment reaches the end of its service life or needs maintenance, the liquid tank 21 is emptied through the bottom drain outlet to reduce weight and facilitate hoisting and dismantling, thus achieving green recycling.

[0049] In other embodiments, the shape of the counterweight 2 is not limited to a frustum shape; any hollow shell structure that can provide a stable supporting base and form an internal liquid reservoir is applicable. For example, the counterweight may also be a frustum shape with a polygonal base (such as a quadrangular frustum), part of an ellipsoidal shell (such as a flattened ellipsoidal shell), or other rotating shells with streamlined features.

[0050] In other embodiments, the liquid injection pipeline 3 may be omitted, and liquid accounting for 60% to 80% of the total volume of the liquid tank 21 inside the prefabricated counterweight 2 housing may be directly injected. Then the injection port may be permanently sealed. This pre-filled liquid method can also enable the liquid tank 21 to have a damping function after installation.

[0051] In summary, the embodiments of the present invention provide a marine photovoltaic foundation device. In the marine photovoltaic foundation device of the present invention, the photovoltaic modules on the upper part of the support pile bearing component are fixed to the counterweight part at the lower part of the support pile, which contains liquid. This significantly increases the overall mass and overturning stability of the support pile through its own weight. When the support pile is subjected to dynamic loads such as wind loads, seawater wave forces, and ocean current forces, the dynamic loads are transmitted to the counterweight part, and the liquid contained in the liquid tank inside the counterweight part shakes accordingly. Through the friction and impact between the liquid and the tank wall, as well as the vortex and turbulence inside the liquid, a large amount of vibration energy is dissipated, thereby generating a significant damping effect. This can effectively reduce the vibration amplitude of the support pile, enhance the adaptability of the support pile to dynamic loads, and improve the service life of the support pile.

[0052] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A marine photovoltaic foundation device, characterized in that, include: Support pile (1), the support pile (1) is used to anchor in the seabed, the top of the support pile (1) is used to support the photovoltaic module (5), and the support pile (1) has a cavity inside; The counterweight (2) is fixed to the lower part of the support pile (1). The counterweight (2) has a liquid tank (21) for containing liquid inside. The counterweight (2) is provided with a through-hole (22) for the support pile (1) to pass through. The injection pipeline (3) is located in the cavity and connected to the support pile (1). The injection pipeline (3) has an inlet branch pipe (31) and an outlet branch pipe (33) that are interconnected. The inlet branch pipe (31) is connected to an external water source, and the outlet branch pipe (33) passes through the cavity and is connected to the liquid tank (21). When the support pile (1) is subjected to dynamic load, the liquid sloshing in the liquid tank (21) generates a damping effect to reduce the vibration amplitude of the support pile (1).

2. The offshore photovoltaic foundation device according to claim 1, characterized in that, The counterweight (2) is a frustum-shaped shell, and the fitting channel (22) is located in the middle of the frustum-shaped shell.

3. The offshore photovoltaic foundation device according to claim 2, characterized in that, The longitudinal distance between the frustum-shaped shell and the bottom of the support pile (1) is 4m to 5m, and the bottom wall of the frustum-shaped shell is used to fit against the seabed surface.

4. The offshore photovoltaic foundation device according to claim 2, characterized in that, The frustum-shaped shell is provided with an annular compartment plate (23). The bottom of the annular compartment plate (23) is connected to the bottom wall of the frustum-shaped shell, and there is a gap between the top of the annular compartment plate (23) and the top wall of the frustum-shaped shell, so that the annular compartment plate (23) can connect the inner and outer annular spaces separated by the liquid tank (21) at the top.

5. The offshore photovoltaic foundation according to claim 2, characterized in that, The frustum-shaped shell is also provided with multiple circumferentially spaced stiffening plates (24).

6. The offshore photovoltaic infrastructure according to claim 1, characterized in that, The injection pipeline (3) also includes a ring branch pipe (32); The inlet end of the liquid inlet branch pipe (31) is located at the top or above the support pile (1); The annular branch pipe (32) is connected to the outlet end of the liquid inlet branch pipe (31); The liquid outlet branch pipe (33) is provided in multiple ways. Each liquid outlet branch pipe (33) is distributed circumferentially along the annular branch pipe (32). The inlet end of each liquid outlet branch pipe (33) is connected to the annular branch pipe (32), and the outlet end extends through the corresponding through holes on the support pile (1) and the counterweight (2) to the liquid tank (21).

7. The offshore photovoltaic infrastructure according to any one of claims 1-6, characterized in that, The volume of liquid injected through the injection line (3) accounts for 60% to 80% of the total volume of the liquid tank (21).

8. The offshore photovoltaic base device according to any one of claims 1-6, characterized in that, The upper surface of the counterweight (2) is provided with a plurality of mounting parts (25) spaced apart in a circumferential direction.

9. A marine photovoltaic foundation device, characterized in that, include: Support pile (1), the support pile (1) is used to anchor in the seabed, and the top of the support pile (1) is used to support the photovoltaic module (5). The counterweight (2) is fixed to the lower part of the support pile (1), and the interior of the counterweight (2) has a liquid tank (21) for containing liquid. When the support pile (1) is subjected to dynamic load, the liquid sloshing in the liquid tank (21) generates a damping effect to reduce the vibration amplitude of the support pile (1).

10. A marine photovoltaic power generation system, characterized in that, The offshore photovoltaic foundation includes any one of claims 1-9, wherein the support pile (1) of the offshore photovoltaic foundation is provided with a support platform (4) on top, and photovoltaic modules (5) are installed on the support platform (4).

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