Offshore photovoltaic device

Abstract

The invention provides an offshore photovoltaic device. The offshore photovoltaic device comprises a photovoltaic module; the floating base body assembly can float on the sea surface and is connected with a seabed anchoring foundation; the first rotating structure is rotatably arranged on the floating base body assembly, and the rotating axis of the first rotating structure extends in the vertical direction; the second rotating structure is rotatably arranged on the first rotating structure, the photovoltaic module is arranged on the second rotating structure, and the rotating axis of the second rotating structure extends in the transverse direction. According to the technical scheme of the invention, the problem of small power generation amount of the photovoltaic module in the prior art can be effectively solved.

Description

Technical Field

[0001] The present invention relates to the field of new energy technology, and in particular to an offshore photovoltaic device. Background Art

[0002] Floating offshore photovoltaic power generation structure is an innovative technology that installs photovoltaic power generation system on the water surface. Compared with traditional land-based photovoltaic power plants, floating offshore photovoltaic power generation structure does not occupy valuable land resources and is particularly suitable for areas with limited land resources. The cooling effect of water on photovoltaic modules and cables can also improve power generation efficiency, because lower operating temperatures help improve the power generation performance of photovoltaic modules.

[0003] However, the floating offshore photovoltaic power generation structure will constantly sway under the influence of wind and waves when working, which will cause the inclination angle of the photovoltaic modules on the floating offshore photovoltaic power generation structure to change, making it difficult for the photovoltaic modules to maintain the inclination angle for optimal power generation to align with the light. Summary of the invention

[0004] The main purpose of the present invention is to provide an offshore photovoltaic device to solve the problem of low power generation of photovoltaic modules in related technologies.

[0005] In order to achieve the above-mentioned objectives, the present invention provides an offshore photovoltaic device, comprising: a photovoltaic module; a floating base module, which can float on the sea surface and is connected to a seabed anchoring foundation; a first rotating structure, which is rotatably arranged on the floating base module, and the rotation axis of the first rotating structure extends in the vertical direction; a second rotating structure, which is rotatably arranged on the first rotating structure, and the photovoltaic module is arranged on the second rotating structure, and the rotation axis of the second rotating structure extends in the lateral direction.

[0006] Furthermore, the first rotating structure comprises a first mounting column extending in a vertical direction, the lower end of the first mounting column is connected to a bearing of the floating base assembly, and the second rotating structure is connected to the upper end of the first mounting column.

[0007] Further, a driving tooth portion is disposed on one of the first mounting column and the floating base assembly, and a driven tooth portion meshing with the driving tooth portion is disposed on the other of the first mounting column and the floating base assembly.

[0008] Further, the driving tooth portion includes a driving gear arranged on the first mounting column, and the driven tooth portion includes an annular gear ring arranged on the floating base assembly; and / or, there are multiple driving tooth portions, and the multiple driving tooth portions are installed on the first mounting column and arranged along the circumferential direction of the first mounting column. The offshore photovoltaic device also includes multiple first driving motors arranged on the first mounting column and corresponding one-to-one to the multiple driving tooth portions, and the first driving motors drive the corresponding driving tooth portions to rotate.

[0009] Furthermore, the offshore photovoltaic device also includes a protective structure, the first mounting column includes a large diameter section and a small diameter section located at the lower end of the large diameter section, the lower end of the small diameter section is connected to the bearing of the floating base assembly, and an accommodating space for accommodating the driving tooth portion and the driven tooth portion is formed between the lower end surface of the large diameter section, the outer wall surface of the small diameter section and the upper surface of the floating base assembly, and the protective structure is arranged on the circumferential outer side of the driving tooth portion and the driven tooth portion.

[0010] Furthermore, the protective structure includes an outer panel and an inner panel that are nested with each other, the outer panel includes an inner convex edge protruding inward, the inner panel includes an outer convex edge protruding outward and cooperating with the inner convex edge stopper, one of the outer panel and the inner panel is connected to the large diameter section, and the other of the outer panel and the inner panel is connected to the floating base assembly.

[0011] Furthermore, a mounting seat is provided at the upper end of the first rotating structure, and the second rotating structure includes a rotating rod rotatably inserted through the mounting seat, the rotating rod extends in a lateral direction, and the photovoltaic component is connected to the rotating rod and can rotate synchronously with the rotating rod.

[0012] Furthermore, a second drive motor and a second gear are provided at the upper end of the first rotating structure. The second rotating structure also includes a third gear provided on the rotating rod. The second gear is connected to the rotating shaft of the second drive motor and rotates synchronously with the rotating shaft of the second drive motor. The third gear is meshed with the second gear to drive the rotating rod to rotate.

[0013] Furthermore, the floating base assembly also includes a first buoy, a second buoy and a second mounting column, the first buoy and the second buoy are cross-arranged, the second mounting column is connected at the intersection of the first buoy and the second buoy, and the first rotating structure is arranged at the upper end of the second mounting column.

[0014] Furthermore, the floating base assembly also includes a plurality of tension connectors, the lower ends of the plurality of tension connectors are connected to the seabed anchoring foundation, the upper end of at least one tension connector is connected to the first end of the first buoy, the upper end of at least one tension connector is connected to the second end of the first buoy, the upper end of at least one tension connector is connected to the first end of the second buoy, and the upper end of at least one tension connector is connected to the second end of the second buoy.

[0015] By applying the technical solution of the present invention, the photovoltaic assembly is used to convert light energy into electrical energy to realize the basic functions of the offshore photovoltaic device. The floating base assembly can float on the sea surface and connect to the seabed anchoring foundation. The floating base assembly provides a support foundation for each component of the offshore photovoltaic device. The first rotating structure is rotatably arranged on the floating base assembly, and the rotation axis of the first rotating structure extends in the vertical direction; the second rotating structure is rotatably arranged on the first rotating structure, and the photovoltaic assembly is arranged on the second rotating structure, and the rotation axis of the second rotating structure extends in the transverse direction. The setting of the first rotating structure enables the photovoltaic assembly to rotate in the vertical direction, and the setting of the second rotating structure enables the photovoltaic assembly to rotate in the transverse direction. The first rotating structure and the second rotating structure cooperate together, so that the photovoltaic assembly can adjust its inclination angle at multiple angles, so that the photovoltaic assembly can be at the inclination angle of the best power generation to align with the light, thereby improving the light energy conversion rate of the photovoltaic assembly, and then improving the power generation efficiency of the offshore photovoltaic device. Therefore, the technical solution of the present application can effectively solve the problem of low power generation of photovoltaic assemblies in the related technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of an offshore photovoltaic device according to the present invention is shown;

[0018] Figure 2 Shows Figure 1 A schematic front view of an offshore photovoltaic device;

[0019] Figure 3 Shows Figure 1 A schematic diagram of the three-dimensional structure of the first transmission structure of the offshore photovoltaic device;

[0020] Figure 4 Shows Figure 1 Schematic diagram of the three-dimensional structure of the second transmission structure of the offshore photovoltaic device.

[0021] The above drawings include the following reference numerals:

[0022] 10. Photovoltaic modules;

[0023] 20. floating base assembly; 21. first buoy; 22. second buoy; 23. second mounting column;

[0024] 30. first rotating structure; 31. first mounting column; 311. large diameter section; 312. small diameter section; 32. driving gear; 321. driving gear; 33. driven gear; 331. annular gear ring;

[0025] 40. second rotating structure; 41. rotating rod; 42. third gear;

[0026] 51. first drive motor; 52. accommodation space; 53. mounting seat; 54. second drive motor; 55. second gear; 56. tension connection member;

[0027] 60. Protective structure; 61. Outer panel; 62. Inner panel; 63. Inner convex edge; 64. Outer convex edge. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0030] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0031] like Figures 1 to 4 As shown, the present application provides an offshore photovoltaic device. An embodiment of the offshore photovoltaic device of the present application includes: a photovoltaic component 10, a floating base component 20, a first rotating structure 30, and a second rotating structure 40; the floating base component 20 can float on the sea surface and be connected to a seabed anchoring foundation; the first rotating structure 30 is rotatably arranged on the floating base component 20, and the rotation axis of the first rotating structure 30 extends in the vertical direction; the second rotating structure 40 is rotatably arranged on the first rotating structure 30, and the photovoltaic component 10 is arranged on the second rotating structure 40, and the rotation axis of the second rotating structure 40 extends in the lateral direction.

[0032] By applying the technical solution of this embodiment, the photovoltaic assembly 10 is used to convert light energy into electrical energy to realize the basic functions of the offshore photovoltaic device. The floating base assembly 20 can float on the sea surface and be connected to the seabed anchoring foundation. The floating base assembly 20 provides a support foundation for various components of the offshore photovoltaic device. The first rotating structure 30 is rotatably arranged on the floating base assembly 20, and the rotation axis of the first rotating structure 30 extends in the vertical direction; the second rotating structure 40 is rotatably arranged on the first rotating structure 30, and the photovoltaic assembly 10 is arranged on the second rotating structure 40, and the rotation axis of the second rotating structure 40 extends in the transverse direction. The arrangement of the first rotating structure 30 enables the photovoltaic assembly 10 to rotate in the vertical direction, and the arrangement of the second rotating structure 40 enables the photovoltaic assembly 10 to rotate in the transverse direction. The first rotating structure 30 and the second rotating structure 40 cooperate with each other, so that the photovoltaic assembly 10 can adjust its inclination angle at multiple angles, so that the photovoltaic assembly 10 can be at the inclination angle of the best power generation to align with the light, thereby improving the light energy conversion rate of the photovoltaic assembly 10, and then improving the power generation efficiency of the offshore photovoltaic device. Therefore, the technical solution of this embodiment can effectively solve the problem of low power generation of photovoltaic modules in related technologies.

[0033] like Figures 1 to 3 As shown, the first rotating structure 30 includes a first mounting column 31 extending in the vertical direction, the lower end of the first mounting column 31 is bearing-connected to the floating base assembly 20, and the second rotating structure 40 is connected to the upper end of the first mounting column 31. Specifically, the photovoltaic assembly 10 is connected to the upper end of the first mounting column 31 through the second rotating structure 40. Since the lower end of the first mounting column 31 is bearing-connected to the floating base assembly 20 and the first mounting column 31 extends in the vertical direction, the first mounting column 31 can drive the photovoltaic assembly 10 to rotate in the vertical direction when it rotates.

[0034] like Figure 3As shown, a driving tooth portion 32 is provided on one of the first mounting column 31 and the floating base assembly 20, and a driven tooth portion 33 meshing with the driving tooth portion 32 is provided on the other of the first mounting column 31 and the floating base assembly 20. Specifically, the cooperation of the driving tooth portion 32 and the driven tooth portion 33 realizes the rotation of the first mounting column 31, and the driving tooth portion 32 and the driven tooth portion 33 have the advantages of simple structure and stable transmission.

[0035] like Figure 3 As shown, the driving gear portion 32 includes a driving gear 321 disposed on the first mounting column 31, and the driven gear portion 33 includes an annular gear ring 331 disposed on the floating base assembly 20. The driving gear 321 and the annular gear ring 331 have the advantages of simple structure, low cost, and easy processing. In other embodiments, the annular gear ring can be disposed on the first mounting column, and the driving gear can be disposed on the floating base assembly.

[0036] like Figure 3 As shown, there are multiple drive teeth 32, and the multiple drive teeth 32 are installed on the first mounting column 31 and arranged along the circumferential direction of the first mounting column 31. The offshore photovoltaic device also includes multiple first drive motors 51 arranged on the first mounting column 31 and corresponding to the multiple drive teeth 32 one by one, and the first drive motors 51 drive the corresponding drive teeth 32 to rotate. Specifically, the arrangement of the multiple drive teeth 32 and the multiple first drive motors 51 makes the rotation of the first mounting column 31 more stable, and even if some of the first drive motors 51 fail, it will not affect the rotation of the first mounting column 31.

[0037] like Figure 3 As shown, the offshore photovoltaic device also includes a protective structure 60, the first mounting column 31 includes a large diameter section 311 and a small diameter section 312 located at the lower end of the large diameter section 311, the lower end of the small diameter section 312 is bearing-connected to the floating base assembly 20, and an accommodating space 52 for accommodating the driving tooth portion 32 and the driven tooth portion 33 is formed between the lower end surface of the large diameter section 311, the outer wall surface of the small diameter section 312 and the upper surface of the floating base assembly 20, and the protective structure 60 is arranged on the circumferential outer side of the driving tooth portion 32 and the driven tooth portion 33. Specifically, the accommodating space 52 formed between the lower end surface of the large diameter section 311, the outer wall surface of the small diameter section 312 and the upper surface of the floating base assembly 20 is used to accommodate the driving tooth portion 32 and the driven tooth portion 33, so that the installation position of the above-mentioned components does not need to protrude from the outer surface of the large diameter section 311, making its layout more reasonable. The upper surface of the floating base assembly 20 refers to the upper end surface of the second mounting column 23 (mentioned later). The protective structure 60 is used to protect the components in the accommodating space 52. The protective structure 60 can be located in the accommodating space 52 or outside the accommodating space 52.

[0038] like Figure 3As shown, the protection structure 60 includes an outer plate 61 and an inner plate 62 which are nested with each other, the outer plate 61 includes an inner convex edge 63 protruding inwardly, the inner plate 62 includes an outer convex edge 64 protruding outwardly and engaging with the inner convex edge 63 as a stopper, one of the outer plate 61 and the inner plate 62 is connected to the large diameter section 311, and the other of the outer plate 61 and the inner plate 62 is connected to the floating base assembly 20. In this embodiment, the outer plate 61 is connected to the large diameter section 311, and the inner plate 62 is connected to the floating base assembly 20 (specifically, the second mounting column 23). The outer plate 61 and the large diameter section 311 as well as the inner plate 62 and the second mounting column 23 are detachably connected. The inner plate 62 and the second mounting column 23 are first connected, and then the outer plate 61 is nested on the outer side of the inner plate 62, and then the outer plate 61 and the large diameter section 311 are connected. The inner convex edge 63 and the outer convex edge 64 are stoppered to prevent the first mounting column 31 from detaching from the second mounting column 23 when the connecting bearing between the first mounting column 31 and the second mounting column 23 fails.

[0039] like Figure 4 As shown, a mounting seat 53 is disposed at the upper end of the first rotating structure 30, and the second rotating structure 40 includes a rotating rod 41 rotatably penetrated through the mounting seat 53, the rotating rod 41 extends in the transverse direction, and the photovoltaic assembly 10 is connected to the rotating rod 41 and can rotate synchronously with the rotating rod 41. Specifically, the arrangement of the rotating rod 41 enables the photovoltaic assembly 10 to rotate in the transverse direction, and the mounting seat 53 and the rotating rod 41 have the advantage of simple structure.

[0040] like Figure 4 As shown, the upper end of the first rotating structure 30 is also provided with a second drive motor 54 and a second gear 55, and the second rotating structure 40 also includes a third gear 42 provided on the rotating rod 41, the second gear 55 is connected to the rotating shaft of the second drive motor 54 and rotates synchronously with the rotating shaft of the second drive motor 54, and the third gear 42 is meshed with the second gear 55 to drive the rotating rod 41 to rotate. Specifically, there are two second drive motors 54 and two second gears 55, and two third gears 42, and the two third gears 42 are located at both ends of the rotating rod 41. The second drive motor 54 drives the corresponding second gear 55 to rotate, thereby driving the corresponding third gear 42 to rotate, and then driving the rotating rod 41 to rotate. The photovoltaic assembly 10 is connected to the middle position of the rotating rod 41 through two ear plates, and multiple second drive motors 54 and corresponding transmission components make the rotation of the rotating rod 41 more stable.

[0041] like Figure 1 as well as Figure 2As shown, the floating base assembly 20 further includes a first buoy 21, a second buoy 22, and a second mounting column 23. The first buoy 21 and the second buoy 22 are cross-arranged, the second mounting column 23 is connected at the intersection of the first buoy 21 and the second buoy 22, and the first rotating structure 30 is arranged at the upper end of the second mounting column 23. The first buoy 21 and the second buoy 22 can provide greater buoyancy, and the cross-arrangement of the first buoy 21 and the second buoy 22 makes the buoyancy distribution more uniform. The second mounting column 23 is connected at the intersection of the first buoy 21 and the second buoy 22, so that the second mounting column 23 and various components above it can be subjected to relatively uniform buoyancy.

[0042] like Figure 1 as well as Figure 2 As shown, the floating base assembly 20 also includes a plurality of tension connectors 56, the lower ends of the plurality of tension connectors 56 are connected to the seabed anchor foundation, the upper end of at least one tension connector 56 is connected to the first end of the first buoy 21, the upper end of at least one tension connector 56 is connected to the second end of the first buoy 21, the upper end of at least one tension connector 56 is connected to the first end of the second buoy 22, and the upper end of at least one tension connector 56 is connected to the second end of the second buoy. Specifically, there are four tension connectors 56, and the upper ends of the four tension connectors 56 are respectively connected to the first end of the first buoy 21, the second end of the first buoy 21, the first end of the second buoy 22, and the second end of the second buoy, so that each end of the first buoy 21 and the second buoy 22 can be subjected to a relatively uniform traction force. Under normal working conditions, the tension connector 56 is always in a tensioned state, and the downward traction force of the tension connector 56 plus the deadweight of other components of the offshore photovoltaic device are balanced with the upward buoyancy provided by the first buoy 21 and the second buoy 22. Since the buoyancy provided by the first buoy 21 and the second buoy 22 is much greater than the deadweight of other components of the offshore photovoltaic device, the tension connector 56 always maintains a large traction force under normal working conditions. Under the action of the large traction force, the offshore photovoltaic device has a small movement amplitude under wind and waves.

[0043] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0044] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0045] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An offshore photovoltaic device, characterized in that: include: Photovoltaic module (10); A floating base assembly (20) capable of floating on the sea surface and connected to a seabed anchor foundation; A first rotating structure (30) is rotatably arranged on the floating base assembly (20), wherein the rotating axis of the first rotating structure (30) extends in a vertical direction; The second rotating structure (40) is rotatably arranged on the first rotating structure (30), the photovoltaic assembly (10) is arranged on the second rotating structure (40), and the rotation axis of the second rotating structure (40) extends in a transverse direction.

2. The offshore photovoltaic device according to claim 1, characterized in that: The first rotating structure (30) comprises a first mounting column (31) extending in the vertical direction, the lower end of the first mounting column (31) being connected to the bearing of the floating base assembly (20), and the second rotating structure (40) being connected to the upper end of the first mounting column (31).

3. The offshore photovoltaic device according to claim 2, characterized in that: One of the first mounting column (31) and the floating base assembly (20) is provided with a driving tooth portion (32), and the other of the first mounting column (31) and the floating base assembly (20) is provided with a driven tooth portion (33) meshing with the driving tooth portion (32).

4. The offshore photovoltaic device according to claim 3, characterized in that: The driving gear portion (32) comprises a driving gear (321) arranged on the first mounting column (31), and the driven gear portion (33) comprises an annular gear ring (331) arranged on the floating base assembly (20); and / or, There are a plurality of drive teeth (32), and the plurality of drive teeth (32) are mounted on the first mounting column (31) and arranged along the circumferential direction of the first mounting column (31). The offshore photovoltaic device also includes a plurality of first drive motors (51) arranged on the first mounting column (31) and corresponding one-to-one to the plurality of drive teeth (32). The first drive motors (51) drive the corresponding drive teeth (32) to rotate.

5. The offshore photovoltaic device according to claim 3, characterized in that: The offshore photovoltaic device also includes a protective structure (60); the first mounting column (31) includes a large diameter section (311) and a small diameter section (312) located at the lower end of the large diameter section (311); the lower end of the small diameter section (312) is connected to the bearing of the floating base assembly (20); a receiving space (52) for receiving the driving tooth portion (32) and the driven tooth portion (33) is formed between the lower end surface of the large diameter section (311), the outer wall surface of the small diameter section (312) and the upper surface of the floating base assembly (20); and the protective structure (60) is arranged on the circumferential outer side of the driving tooth portion (32) and the driven tooth portion (33).

6. The offshore photovoltaic device according to claim 5, characterized in that: The protective structure (60) comprises an outer plate (61) and an inner plate (62) which are nested with each other, the outer plate (61) comprising an inner convex edge (63) protruding inwardly, the inner plate (62) comprising an outer convex edge (64) protruding outwardly and engaging with the inner convex edge (63) as a stopper, one of the outer plate (61) and the inner plate (62) being connected to the large diameter section (311), and the other of the outer plate (61) and the inner plate (62) being connected to the floating base assembly (20).

7. The offshore photovoltaic device according to any one of claims 1 to 6, characterized in that: A mounting seat (53) is provided at the upper end of the first rotating structure (30), the second rotating structure (40) comprises a rotating rod (41) rotatably inserted through the mounting seat (53), the rotating rod (41) extending along the transverse direction, and the photovoltaic assembly (10) is connected to the rotating rod (41) and can rotate synchronously with the rotating rod (41).

8. The offshore photovoltaic device according to claim 7, characterized in that: A second drive motor (54) and a second gear (55) are also provided at the upper end of the first rotating structure (30); the second rotating structure (40) further comprises a third gear (42) provided on the rotating rod (41); the second gear (55) is connected to the rotating shaft of the second drive motor (54) and rotates synchronously with the rotating shaft of the second drive motor (54); the third gear (42) is meshed with the second gear (55) to drive the rotating rod (41) to rotate.

9. The offshore photovoltaic device according to any one of claims 1 to 6, characterized in that: The floating base assembly (20) also includes a first buoy (21), a second buoy (22) and a second mounting column (23), wherein the first buoy (21) and the second buoy (22) are arranged crosswise, the second mounting column (23) is connected at the intersection of the first buoy (21) and the second buoy (22), and the first rotating structure (30) is arranged at the upper end of the second mounting column (23).

10. The offshore photovoltaic device according to claim 9, characterized in that: The floating base assembly (20) also includes a plurality of tension connectors (56), the lower ends of the plurality of tension connectors (56) are connected to the seabed anchoring foundation, the upper end of at least one of the tension connectors (56) is connected to the first end of the first buoy (21), the upper end of at least one of the tension connectors (56) is connected to the second end of the first buoy (21), the upper end of at least one of the tension connectors (56) is connected to the first end of the second buoy (22), and the upper end of at least one of the tension connectors (56) is connected to the second end of the second buoy (22).

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