Floating type photovoltaic power generation device

Abstract

The utility model discloses a floating type photovoltaic power generation device comprising a photovoltaic power generation array which is formed by splicing a plurality of photovoltaic power generation units. The photovoltaic power generation unit comprises a base, a power generation unit stand column and a photovoltaic support. A photovoltaic module is arranged on the photovoltaic bracket; the base is built through the UHPC floating pipes, the UHPC floating pipes can reduce the steel consumption and the construction cost, and the risk of overall failure of the system is reduced. The raft structure of the base can effectively reduce the mechanical effect of wave loads on the system structure, and the floating pipe with the circular section can dissipate waves. Besides, according to the end cast-in-place connecting structure, all connected parts form an integrated structure in a cast-in-place mode, so that the whole device can be assembled in a modularized mode, cost is reduced, and meanwhile the mechanical property is better through the integrated structure of the connecting position. The device is simple in structure, easy to realize and capable of effectively reducing the equipment cost and prolonging the service life of the equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, and more specifically, to a floating photovoltaic power generation device. Background Art

[0002] At present, offshore photovoltaics are mainly divided into fixed pile-column photovoltaics with intensive piling applicable to coastal tidal flats and floating photovoltaics applicable to areas outside the intertidal zone. For floating photovoltaic systems, the existing technologies mainly follow the plastic floating box and floating drum floating photovoltaics for inland water bodies such as lakes and reservoirs, as well as semi-submersible steel platform floating photovoltaics. The plastic floating box and floating drum floating photovoltaics use plastic floating boxes as buoyancy units, and are paired with hot-dip galvanized steel brackets to fix the power generation units for power generation. Due to the designed environment being a still inland lake, there are disadvantages such as poor adaptability to extreme weather and easy occurrence of fatigue failure when applied in the marine environment. The semi-submersible steel platform floating photovoltaics use sealed steel cylinders paired with high molecular polyethylene buoyancy materials as buoyancy units to construct platforms with four corners, six corners and other polygons to carry the power generation units for power generation. Currently, the semi-submersible steel platform floating photovoltaics are mainly used for offshore floating photovoltaic scientific research and demonstration. Their own materials and construction costs are high, and it is difficult to meet the requirements of the return on investment of photovoltaic projects. In addition, there are also disadvantages such as easy corrosion and failure of metals in the warm, humid, polluted and corrosive marine environment, complex support structures, huge construction difficulties, and frequent subsequent operation and maintenance.

[0003] Therefore, in view of the above situation, how to improve the durability of offshore photovoltaic platforms and reduce their costs has become an important technical problem that needs to be solved urgently by those skilled in the art. Summary of the Utility Model

[0004] The utility model provides a floating photovoltaic power generation device to solve the problems raised in the above background art. To achieve the above object, the utility model provides the following technical solution: A floating photovoltaic power generation device includes a photovoltaic power generation array, and the photovoltaic power generation array is spliced by a plurality of photovoltaic power generation units; each photovoltaic power generation unit includes a base, four power generation unit columns and a photovoltaic bracket; the base is spliced by four internally hollow UHPC floating pipes, and the four UHPC floating pipes are connected end to end to form a rectangular frame structure; the four power generation unit columns are respectively arranged at the joints of the four UHPC floating pipes; the cross-section of the UHPC floating pipe is circular, its interior is a hollow structure, both ends are closed structures, and a maintenance and inspection walkway is provided at the top; end cast-in-place connection structures are respectively arranged at the four corners of the base, and the end cast-in-place connection structures are respectively connected to the UHPC floating pipes on both sides, the maintenance and inspection walkways on both sides and the power generation unit columns at the top; the photovoltaic bracket is connected to the tops of the four power generation unit columns, and photovoltaic modules are arranged on the photovoltaic bracket; a waterproof box is arranged on one of the four power generation unit columns, and an energy storage device and an inverter device connected to the photovoltaic modules are arranged in the waterproof box.

[0005] Preferably, the interior of the UHPC floating pipe is filled with polyurethane or foam.

[0006] Preferably, the four UHPC floating pipes are respectively the first floating pipe, the second floating pipe, the third floating pipe and the fourth floating pipe connected in sequence, wherein the first floating pipe and the third floating pipe have the same length, both being 16 m; the second floating pipe and the fourth floating pipe have the same length, both being 5 m; and the wall thicknesses of the first floating pipe, the second floating pipe, the third floating pipe and the fourth floating pipe are all 30 mm.

[0007] Preferably, the end cast-in-place connection structure is a cuboid structure, with a slot matching the column of the power generation unit provided at the top, and openings matching the UHPC floating pipes respectively provided on two adjacent side surfaces.

[0008] Preferably, the end cast-in-place connection structure is cast in place with UHPC material, and the end cast-in-place connection structure forms an integral structure with the connected UHPC floating pipe, the operation and maintenance access path and the column of the power generation unit by means of cast-in-place.

[0009] Preferably, the operation and maintenance access path is made of UHPC material, and the cross section of the operation and maintenance access path is in a flat-bottomed inverted U-shaped structure, which includes a walkway board and side walls located at both ends of the walkway board; grooves matching the side walls are respectively provided at both ends of the UHPC floating pipe, the side walls are inserted into the corresponding grooves, and are fixedly connected to the grooves by bolts; anti-slip patterns are provided on the surface of the walkway board.

[0010] Preferably, slots are provided at the connection between two adjacent UHPC floating pipes; the column of the power generation unit is prefabricated and formed with UHPC material, and a plug block matching the slot is provided at the bottom thereof, the plug block is inserted into the corresponding slot and fixedly connected by bolts; bolt holes are provided at the top of the column of the power generation unit, and the bottom of the photovoltaic support is connected to the bolt holes.

[0011] Preferably, the photovoltaic support is formed by welding hot-dip galvanized steel or prefabricated and formed with UHPC material; the photovoltaic support includes two end supports arranged in parallel with each other, and four groups of cross beams are respectively lapped between the two end supports; the end support includes a vertical rod and an inclined rod, the bottom of the vertical rod is connected to the corresponding column of the power generation unit, the top is connected to one end of the inclined rod, and the other end of the inclined rod is connected to the corresponding column of the power generation unit; the included angle between the vertical rod and the inclined rod is 60-90°; a plurality of photovoltaic modules are provided, and the plurality of photovoltaic modules are laid flat on the cross beams; the photovoltaic module is a double-sided double-glass module, and an aluminum frame is provided at the edge thereof; mounting holes are provided on the aluminum frame, and bolts are provided on the mounting holes and connected to the corresponding cross beams; gaps are provided between adjacent photovoltaic modules.

[0012] Preferably, the photovoltaic power generation unit is provided with splicing ports, and adjacent photovoltaic power generation units can be connected through the splicing ports; flexible connections are adopted between adjacent splicing ports.

[0013] Preferably, mooring components are respectively arranged at the four corners of the base. The mooring components include mooring rings, mooring cables and mooring anchors; the mooring rings are connected to the end cast-in-place connection structure, one end of the mooring cable is connected to the mooring ring, and the other end is connected to the mooring anchor; the end cast-in-place connection structure forms an integrated structure by cast-in-place of the connected mooring rings, UHPC floating pipes, operation and maintenance walkways and power generation unit columns.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: The present utility model uses UHPC floating pipes to build the base. The UHPC floating pipes can reduce the steel consumption and project cost, and avoid the risk that the traditional metal base needs to be regularly inspected, otherwise the coating peeling will cause the overall failure of the system. The raft structure of the base can effectively reduce the mechanical action of wave loads on the system structure, and the floating pipes with a circular cross-section can dissipate waves; in addition, the end cast-in-place connection structure forms an integrated structure of each connected component by cast-in-place, enabling the entire device to achieve modular assembly, reducing costs, and at the same time, the integrated structure at the connection makes the mechanical properties better; the structure of the present utility model is simple and easy to implement, which can effectively reduce the equipment cost and improve the service life of the equipment. Description of the Drawings

[0015] Figure 1 It is the photovoltaic array structure diagram of the floating photovoltaic power generation device according to the embodiment of the present utility model;

[0016] Figure 2 It is the structure diagram of the photovoltaic power generation unit of the floating photovoltaic power generation device according to the embodiment of the present utility model;

[0017] Figure 3 It is the structure diagram of the photovoltaic power generation unit of the floating photovoltaic power generation device according to the embodiment of the present utility model from another angle;

[0018] Figure 4 It is the side structure diagram of the photovoltaic power generation unit of the floating photovoltaic power generation device according to the embodiment of the present utility model;

[0019] Figure 5 It is the schematic diagram of the end cast-in-place connection structure of the floating photovoltaic power generation device according to the embodiment of the present utility model;

[0020] In Figures 1 to 5 wherein the corresponding relationship between the names of each component and the reference numerals in the drawings is:

[0021] 1 - Photovoltaic power generation array, 11 - Photovoltaic power generation unit, 111 - Base, 1111 - UHPC floating pipe, 112 - Column of power generation unit, 113 - Photovoltaic support, 1131 - End support, 11311 - Vertical pole, 11312 - Diagonal pole, 1132 - Cross beam, 114 - Maintenance and repair walkway, 115 - End cast-in-place connection structure, 1151 - Slot, 1152 - Opening, 116 - Photovoltaic module, 117 - Waterproof box. Detailed implementation manners

[0022] The following further describes the implementation manners of the present utility model in detail with reference to the accompanying drawings and embodiments. The attached drawings are only for reference and explanation purposes and are not used to limit the embodiments of the present disclosure. The following embodiments are used to illustrate the present utility model but cannot be used to limit the scope of the present utility model.

[0023] In the description of the present utility model, unless otherwise specified, "a plurality of" means two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0024] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] Please refer to Figures 1 to 5, the present utility model provides a floating photovoltaic power generation device, which includes a photovoltaic power generation array 1, and the photovoltaic power generation array 1 is spliced by a plurality of photovoltaic power generation units 11; the photovoltaic power generation unit 11 includes a base 111, four power generation unit columns 112 and a photovoltaic bracket 113; the base 111 is composed of four internally hollow UHPC floating pipes 1111 spliced together, and the four UHPC floating pipes 1111 are connected end to end to form a rectangular frame structure; the four power generation unit columns 112 are respectively arranged at the joints of the four UHPC floating pipes 1111; the cross-section of the UHPC floating pipe 1111 is circular, its interior is a hollow structure, both ends are closed structures, and an operation and maintenance inspection path 114 is provided on the top; end cast-in-place connection structures 115 are respectively arranged at the four corners of the base 111, and the end cast-in-place connection structures 115 are respectively connected to the UHPC floating pipes 1111 on both sides, the operation and maintenance inspection paths 114 on both sides and the power generation unit columns 112 on the top; the photovoltaic bracket 113 is connected to the tops of the four power generation unit columns 112, and a photovoltaic module 116 is provided on the photovoltaic bracket 113; a waterproof box 117 is arranged on one of the four power generation unit columns 112, and an energy storage device and an inverter device connected to the photovoltaic module 116 are arranged in the waterproof box 117.

[0026] In the embodiment of the present utility model, the UHPC floating pipes 1111 are spliced to form a rectangular frame. Since the interior of the UHPC floating pipe 1111 is hollow and both ends are sealed, the base 111 made of the UHPC floating pipe 1111 can float on the water surface. The operation and maintenance inspection path 114 is arranged on the upper part of the UHPC floating pipe 1111 and is deployed along the length direction of the UHPC floating pipe 1111. The power generation unit columns 112 are located at the four corners of the frame structure spliced by the UHPC floating pipes 1111 and are connected to the UHPC floating pipes 1111 and the operation and maintenance inspection paths 114 through the end cast-in-place connection structures 115. The photovoltaic bracket 113 is located at the upper end of the power generation unit columns 112, and the photovoltaic module 116 is on the photovoltaic bracket 113. The supporting energy storage device and inverter device are mechanically connected to the power generation unit column 112 through a special waterproof box 117 for the marine environment with an IP68 or higher waterproof level.

[0027] In this embodiment, the UHPC floating pipe 1111 is made of UHPC material. The UHPC material, namely ultra-high performance concrete, is a new type of building material, also known as UHPC concrete (Ultra High Performance Concrete), which is mainly composed of cement, quartz powder, wollastonite, fibers, etc. Compared with traditional concrete materials, ultra-high performance concrete materials have higher strength, better durability and lighter weight, and are widely used in construction projects. In the embodiment of the present invention, the base 111 made of the UHPC floating pipe 1111 replaces and upgrades materials such as HDPE floating boxes and steel casings in the prior art. On the basis of meeting the requirements of hydrodynamic performance indicators, the performance of the UHPC material enhances the performance of the system in aspects such as anti-UV aging, anti-temperature and humidity pollution and corrosion environment erosion, and anti-chlorine penetration. While effectively reducing the material cost, the safety and stability of the photovoltaic platform operation are improved, and the relatively fragile photovoltaic modules 116 in the system can be effectively protected.

[0028] Furthermore, the UHPC floating pipe 1111 is processed by a centrifugal process. The cavities formed by the centrifugal operation of the UHPC material and the closed ends ensure buoyancy, and the cross-section is a circular cylindrical tubular structure, so that the UHPC floating pipe 1111 can effectively dissipate waves when placed horizontally, reducing the possibility of the system tipping over.

[0029] Furthermore, the power generation unit columns 112, the operation and maintenance walkways 114 and the photovoltaic brackets 113 in this embodiment can all be made of UHPC material.

[0030] Preferably, the inside of the UHPC floating pipe 1111 is filled with polyurethane or foam. In this embodiment, in order to further improve the reliability of the system, the cavity inside the UHPC floating pipe 1111 is filled with polyurethane or foamed foam. The filling of materials such as polyurethane or foam ensures that when water enters in extreme cases, the base 111 still has sufficient buoyancy to support the platform.

[0031] Preferably, the four UHPC floating pipes 1111 are respectively the first floating pipe, the second floating pipe, the third floating pipe and the fourth floating pipe connected in sequence. The lengths of the first floating pipe and the third floating pipe are the same, both being 16m; the lengths of the second floating pipe and the fourth floating pipe are the same, both being 5m; the wall thicknesses of the first floating pipe, the second floating pipe, the third floating pipe and the fourth floating pipe are all 30mm. In this embodiment, the first floating pipe, the second floating pipe, the third floating pipe and the fourth floating pipe are sequentially spliced to form a rectangular structure with two long sides and two short sides, and the inner walls all have the same thickness, which is 30mm.

[0032] Preferably, the end cast-in-place connection structure 115 is a cuboid structure, with a slot 1151 on its top that matches the power generation unit column 112, and openings 1152 that match the UHPC floating pipe 1111 are respectively provided on two adjacent side faces. In this embodiment, the overall structure of the end cast-in-place connection structure 115 is a cuboid shape. The slot 1151 on the top allows the power generation unit column 112 to pass through, and the openings 1152 on two adjacent sides can be docked with the UHPC floating pipe 1111.

[0033] Preferably, the end cast-in-place connection structure 115 is made by cast-in-place of UHPC material. The end cast-in-place connection structure 115 forms an integrated structure with the connected UHPC floating pipe 1111, the operation and maintenance access path 114, and the power generation unit column 112 in a cast-in-place manner. In this embodiment, the end cast-in-place connection structure 115 is made by cast-in-place of UHPC material. Before production, two adjacent UHPC floating pipes 1111 are docked, then the operation and maintenance access path 114 is installed on the UHPC floating pipe 1111, and the power generation unit column 112 is installed at the connection of the two UHPC floating pipes 1111. After these components are installed, temporary formwork is set at the connection, and then UHPC material is cast into the formwork. After the cast-in-place UHPC material solidifies, the end cast-in-place connection structure 115 is formed. The end cast-in-place connection structure 115 not only forms an integrated connection structure for the UHPC floating pipe 1111, the operation and maintenance access path 114, and the power generation unit column 112, but also wraps the bolts, slots and other components during the docking of the UHPC floating pipe 1111, the operation and maintenance access path 114, and the power generation unit column 112, so that they can maintain a good state to enhance the structural strength.

[0034] Preferably, the operation and maintenance access path 114 is made of UHPC material. The cross-section of the operation and maintenance access path 114 is a flat-bottomed inverted U-shaped structure, which includes a walkway board and side walls at both ends of the walkway board; grooves that match the side walls are respectively provided at both ends of the UHPC floating pipe 1111, and the side walls are inserted into the corresponding grooves and fixedly connected to the grooves by bolts; anti-slip patterns are provided on the surface of the walkway board. In this embodiment, the operation and maintenance access path 114 is matched with the grooves at the UHPC end, the end is inserted into the groove, and then fixed by bolts. After fixing, it is further strengthened by the end cast-in-place connection structure 115 to ensure the connection stability of the operation and maintenance access path 114. Since the marine environment is humid, anti-slip patterns are provided on the surface of the walkway board to reduce the occurrence of slipping accidents.

[0035] Preferably, a slot is provided at the connection between two adjacent UHPC floating pipes 1111; the power generation unit column 112 is prefabricated from UHPC material, and an insertion block matching the slot is provided at its bottom. The insertion block is inserted into the corresponding slot and fixedly connected by bolts; bolt holes are provided at the top of the power generation unit column 112, and the bottom of the photovoltaic support 113 is connected to the bolt holes. In this embodiment, the power generation unit column 112 is prefabricated from UHPC material. The bottom is connected to the UHPC floating pipe 1111 through the cooperation of the insertion block and the slot, plus mechanical connection forms such as fixing bolts. Finally, it is integrally connected to the end structure of the UHPC floating pipe 1111 by in-situ casting, and the upper part is connected to the bottom of the photovoltaic support 113 through the pre-embedded bolt holes.

[0036] Furthermore, the cross-section of the power generation unit column is in a trapezoidal structure, with a wide bottom and a narrow top. The wide bottom helps to provide stable support, and the narrowed top structure facilitates docking with the photovoltaic support 113.

[0037] Preferably, the photovoltaic support 113 is formed by welding hot-dip galvanized steel or prefabricated from UHPC material; the photovoltaic support 113 includes two end supports 1131 arranged in parallel with each other, and four groups of cross beams 1132 are respectively lapped between the two end supports 1131; the end support 1131 includes a vertical rod 11311 and an inclined rod 11312. The bottom of the vertical rod 11311 is connected to the corresponding power generation unit column 112, the top is connected to one end of the inclined rod 11312, and the other end of the inclined rod 11312 is connected to the corresponding power generation unit column 112; the included angle between the vertical rod 11311 and the inclined rod 11312 is 60-90°; multiple photovoltaic modules 116 are provided, and the multiple photovoltaic modules 116 are laid flat on the cross beams 1132; the photovoltaic module 116 is a double-sided double-glass module, and an aluminum frame is provided at its edge; mounting holes are provided on the aluminum frame, and bolts are provided on the mounting holes to connect to the corresponding cross beams 1132; a gap is provided between adjacent photovoltaic modules 116.

[0038] In this embodiment, since the position of the photovoltaic support 113 is relatively high and the chance of contacting the water surface is less, the photovoltaic support 113 can be fabricated by welding hot-dip galvanized steel or prefabricating from UHPC material according to actual requirements. The photovoltaic support 113 includes end supports 1131 and cross beams. One end of the end support 1131 is high and the other end is low, so that the photovoltaic modules 116 installed on the cross beams 1132 can be set at a certain angle with the horizontal plane, so as to select the optimal tilt angle according to different geographical locations.

[0039] In this embodiment, the included angle between the vertical pole 11311 and the inclined pole 11312 is 60 to 90°. Through the above structural design, the photovoltaic module 11 installed on the cross beam 1132 can be adjusted between 0 and 30° southward according to different illumination angles in each sea area, so as to improve the power generation efficiency.

[0040] Preferably, the photovoltaic power generation unit 11 is provided with splicing ports, and adjacent photovoltaic power generation units 11 can be connected through the splicing ports; flexible connections are adopted between adjacent splicing ports. In this embodiment, the photovoltaic power generation units 11 can form a photovoltaic power generation array 1 through the splicing ports and flexible connections. The flexible connection between units can ensure that the whole system does not face the sea wave movement directly, so as to ensure that the large array system structure reaches the optimum in adapting to various movements of ocean wind, wave and surge currents.

[0041] Preferably, mooring components are respectively arranged at the four corners of the base 111. The mooring components include mooring rings, mooring cables and mooring anchors; the mooring rings are connected to the end cast-in-place connection structure 115, one end of the mooring cable is connected to the mooring ring, and the other end is connected to the mooring anchor; the end cast-in-place connection structure 115 forms an integrated structure by cast-in-place of the connected mooring rings, UHPC floating pipes 1111, operation and maintenance walkways 114 and power generation unit columns 112. In this embodiment, multiple mooring components are also provided. The mooring components include mooring rings, mooring cables and mooring anchors. Among them, the mooring rings are embedded with the UHPC floating pipes 1111 by pouring, and the mooring cables connect the mooring rings and the anchoring points to realize the limit of the offshore photovoltaic platform. Further, according to the actual marine survey data, the mooring anchor can adopt a gravity anchor, a drag anchor or a suction anchor.

[0042] Compared with the prior art, the beneficial effects of the present utility model are as follows: The present utility model uses UHPC floating pipes to build the base, and the UHPC floating pipes can reduce the steel consumption and project cost, and avoid the risk that the traditional metal base needs to be regularly inspected, otherwise the coating peeling will cause the overall failure of the system. The raft structure of the base can effectively reduce the mechanical action of wave loads on the system structure, and the floating pipe with a circular cross-section can dissipate waves; in addition, the end cast-in-place connection structure forms an integrated structure of each connected component by cast-in-place, enabling the whole device to realize modular assembly, reducing the cost, and at the same time, the integrated structure at the connection makes the mechanical properties better; the structure of the present utility model is simple and easy to implement, which can effectively reduce the equipment cost and improve the service life of the equipment.

[0043] The embodiments of the present utility model are given for purposes of illustration and description, and are not exhaustive or limit the present utility model to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to better explain the principles of the present utility model and its practical applications, and to enable those of ordinary skill in the art to understand the present utility model and design various embodiments with various modifications suitable for specific purposes.

Claims

1. A floating photovoltaic power generation device, characterized in that: The invention comprises a photovoltaic power generation array (1), wherein the photovoltaic power generation array is formed by splicing a plurality of photovoltaic power generation units (11); the photovoltaic power generation unit comprises a base (111), four power generation unit columns (112) and a photovoltaic support (113); the base is formed by splicing four UHPC floating tubes (1111) with hollow interiors, and the four UHPC floating tubes are connected end to end to form a rectangular frame structure; the four power generation unit columns are respectively arranged at the connection points of the four UHPC floating tubes; the UHPC floating tube has a circular cross-section, a hollow structure inside, and closed structures at both ends. The structure is provided with an operation and maintenance walkway (114) on the top; the four corners of the base are respectively provided with end cast-in-place connection structures (115), and the end cast-in-place connection structures are respectively connected to the UHPC floating pipes on both sides, the operation and maintenance walkways on both sides and the power generation unit columns on the top; the photovoltaic bracket is connected to the top of the four power generation unit columns, and the photovoltaic bracket is provided with a photovoltaic module (116); a waterproof box (117) is provided on one of the four power generation unit columns, and the waterproof box is provided with an energy storage device and an inverter device connected to the photovoltaic module.

2. The floating photovoltaic power generation device according to claim 1, characterized in that: The interior of the UHPC floating tube is filled with polyurethane or foam.

3. The floating photovoltaic power generation device according to claim 2, characterized in that: The four UHPC floating tubes are respectively the first floating tube, the second floating tube, the third floating tube and the fourth floating tube which are connected in sequence, wherein the length of the first floating tube is the same as that of the third floating tube, which is 16 m; the length of the second floating tube is the same as that of the fourth floating tube, which is 5 m; the wall thickness of the first floating tube, the second floating tube, the third floating tube and the fourth floating tube is 30 mm.

4. The floating photovoltaic power generation device according to claim 1, characterized in that: The end cast-in-place connection structure is a rectangular parallelepiped structure, a slot (1151) matching with the power generation unit column is provided on the top, and openings (1152) matching with the UHPC floating tube are respectively provided on the adjacent two side surfaces.

5. The floating photovoltaic power generation device according to claim 1, characterized in that: The end cast-in-place connection structure is made of UHPC material and is cast-in-place to form an integrated structure with the UHPC floating pipe, operation and maintenance walkway and power generation unit column connected to it.

6. The floating photovoltaic power generation device according to claim 5, characterized in that: The operation and maintenance walkway is made of UHPC material. The cross-section of the operation and maintenance walkway is a flat-bottomed inverted U-shaped structure, which includes a walkway board and side walls located at both ends of the walkway board; the two ends of the UHPC floating tube are respectively provided with grooves matching the side walls, and the side walls are inserted into the corresponding grooves and fixedly connected to the grooves by bolts; the surface of the walkway board is provided with an anti-slip pattern.

7. The floating photovoltaic power generation device according to claim 5, characterized in that: A slot is provided at the connection between two adjacent UHPC floating tubes; the power generation unit column is prefabricated with UHPC material, and a plug block matching the slot is provided at the bottom thereof, and the plug block is inserted into the corresponding slot and fixedly connected by bolts; a bolt hole is provided at the top of the power generation unit column, and the bottom of the photovoltaic bracket is connected to the bolt hole.

8. The floating photovoltaic power generation device according to claim 1, characterized in that: The photovoltaic bracket is formed by welding hot-dip galvanized steel or prefabricated with UHPC materials; the photovoltaic bracket includes two end brackets (1131) arranged in parallel with each other, and four groups of cross beams (1132) are overlapped between the two end brackets respectively; the end bracket includes a vertical pole (11311) and an inclined pole (11312), the bottom of the vertical pole is connected to the corresponding power generation unit column, the top is connected to one end of the inclined pole, and the other end of the inclined pole is connected to the corresponding power generation unit column; the angle between the vertical pole and the inclined pole is 60 to 90 degrees; the photovoltaic components are provided with multiple pieces, and the multiple photovoltaic components are laid flat on the cross beam; the photovoltaic component is a double-sided double-glass component, and an aluminum frame is provided at its edge; the aluminum frame is provided with a mounting hole, and bolts are provided on the mounting hole to connect with the corresponding cross beam; a gap is provided between adjacent photovoltaic components.

9. The floating photovoltaic power generation device according to claim 1, characterized in that: The photovoltaic power generation unit is provided with a splicing port, and adjacent photovoltaic power generation units can be connected through the splicing port; and adjacent splicing ports are flexibly connected.

10. The floating photovoltaic power generation device according to any one of claims 1 to 9, characterized in that: Mooring components are respectively provided at the four corners of the base, and the mooring components include a mooring ring, a mooring cable and a mooring anchor; the mooring ring is connected to the end cast-in-place connection structure, one end of the mooring cable is connected to the mooring ring, and the other end is connected to the mooring anchor; the end cast-in-place connection structure forms an integrated structure with the mooring ring, UHPC floating pipe, operation and maintenance walkway and power generation unit column connected thereto by cast-in-place.

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