Floating type offshore photovoltaic platform suitable for marine environment and manufacturing method of floating type offshore photovoltaic platform

Abstract

The invention discloses a floating type offshore photovoltaic platform suitable for a marine environment and a manufacturing method of the floating type offshore photovoltaic platform. The photovoltaic platform comprises a photovoltaic array, and the photovoltaic array 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, and a photovoltaic assembly is arranged on the photovoltaic support; the UHPC materials are adopted for manufacturing the floating pipes, the power generation unit stand columns and the end cast-in-place connecting structures, the marine environment requirement is met, and meanwhile the steel use amount and the engineering cost are reduced. The raft structure design of the base can effectively reduce the mechanical effect of wave loads on the system structure, and the cylindrical floating pipes can dissipate waves. According to the end cast-in-place connecting structure, a cast-in-place mode is adopted, the floating pipe, the operation and maintenance footpath and the power generation unit stand column form an integrated structure, and the mechanical property is better; the photovoltaic support is fixed in a splicing mode after integrated installation, and the construction efficiency is effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic technology, and more specifically, to a floating offshore photovoltaic platform applicable to the marine environment and a manufacturing method thereof. Background Art

[0002] Offshore photovoltaic is a new type of resource development method involving the utilization of marine clean energy. Under the same lighting conditions, developing offshore photovoltaic has advantages that onshore photovoltaic does not have, such as open marine waters, no obstacles, long effective power generation time, high radiation, and high backside power generation efficiency.

[0003] Currently, offshore photovoltaic is mainly divided into fixed pile-column photovoltaic with intensive piling applicable to coastal tidal flats and floating photovoltaic applicable to areas outside the intertidal zone. For floating photovoltaic systems, the existing technologies mainly follow the plastic floating box and floating drum floating photovoltaic for inland water bodies such as lakes and reservoirs, and the semi-submersible steel platform floating photovoltaic.

[0004] The plastic floating box and floating drum floating photovoltaic uses plastic floating boxes as buoyancy units, and is equipped 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, it has disadvantages such as poor adaptability to extreme weather and easy fatigue failure when applied in the marine environment.

[0005] The semi-submersible steel platform floating photovoltaic uses sealed steel cylinders and high molecular polyethylene buoyancy materials as buoyancy units to construct platforms with four corners, six corners and other polygons to carry power generation units for power generation. Currently, the semi-submersible steel platform floating photovoltaic is mainly used for offshore floating photovoltaic scientific research and demonstration. Its own material and construction costs are high, making it difficult to meet the requirements of the investment return rate 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 maintenance.

[0006] Therefore, in view of the above situation, how to improve the offshore photovoltaic platform so that marine clean energy can be utilized more effectively and economically has become an important technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0007] The present invention discloses a floating offshore photovoltaic platform applicable to the marine environment, including a photovoltaic array, and the photovoltaic array is composed of a plurality of photovoltaic power generation units spliced together;

[0008] The photovoltaic power generation unit includes a base that can float on the water surface, four power generation unit columns fixed vertically on the base, and a photovoltaic bracket installed on the tops of the four power generation unit columns;

[0009] The base is composed of four floating pipes spliced together, and the four floating pipes are connected end to end to form a closed rectangular frame structure; four power generation unit columns are respectively arranged at the four corners of the rectangular frame structure; a maintenance and inspection walkway is arranged on the top of the floating pipes; end cast-in-place connection structures are respectively arranged at the four corners of the base; the end cast-in-place connection structures are respectively connected to the floating pipes on both sides, the maintenance and inspection walkways on both sides and the power generation unit columns on the top;

[0010] A waterproof box is arranged on one of the four power generation unit columns, and an energy storage device and an inverter device are arranged in the waterproof box; a maintenance and inspection walkway is arranged between two adjacent end connection mechanisms;

[0011] Photovoltaic modules are arranged on the photovoltaic support.

[0012] Preferably, the floating pipe is made of UHPC material, its cross section is circular, its interior is a hollow structure and both ends are closed structures; the wall thickness of the floating pipe is 30mm, and its interior is filled with polyurethane or foam.

[0013] Preferably, the end cast-in-place connection structure is made by cast-in-place of UHPC material, and the end cast-in-place connection structure forms an integral structure with the connected floating pipe, maintenance and inspection walkway and power generation unit column by cast-in-place.

[0014] Preferably, the maintenance and inspection walkway is made of UHPC material, and the cross section of the maintenance and inspection walkway is a flat-bottomed inverted U-shaped structure, which includes a walkway board and side walls at both ends of the walkway board; grooves matched with the side walls are respectively arranged at both ends of the floating pipe, the side walls are inserted into the corresponding grooves and fixedly connected with the grooves by bolts; anti-slip patterns are arranged on the surface of the walkway board.

[0015] Preferably, a slot is arranged at the connection between two adjacent floating pipes; the power generation unit column is prefabricated and formed by UHPC material, and an insertion block matched with the slot is arranged at the bottom of the power generation unit column, the insertion block is inserted into the corresponding slot and fixedly connected by bolts; bolt holes are arranged at the top of the power generation unit column, and the bottom of the photovoltaic support is connected with the bolt holes.

[0016] Preferably, the photovoltaic support is welded and formed by hot-dip galvanized steel or prefabricated and formed by 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 supports are arranged at an angle with the horizontal plane, and the angle is 0-30°; a plurality of photovoltaic modules are arranged, and the plurality of photovoltaic modules are laid on the cross beams in a tiled form.

[0017] Preferably, the photovoltaic module is a double-sided double-glass module, and its edge is provided with an aluminum frame; the aluminum frame is provided with mounting holes, and bolts are arranged on the mounting holes to be connected with the corresponding cross beam; there is a gap between adjacent photovoltaic modules.

[0018] Preferably, mooring components are respectively arranged at the four corners of the base, and the mooring components include mooring rings, mooring cables and mooring anchors; the mooring rings are connected with the end cast-in-place connection structure, one end of the mooring cable is connected with the mooring ring, and the other end is connected with the mooring anchor; the end cast-in-place connection structure forms an integrated structure by cast-in-place means for the connected mooring rings, floating pipes, operation and maintenance walkways and power generation unit columns.

[0019] Preferably, flexible connections are adopted between adjacent photovoltaic power generation units.

[0020] A manufacturing method of a floating offshore photovoltaic platform applicable to the marine environment includes the following steps:

[0021] Step 1: Arrange four floating pipes at equal intervals on the same horizontal plane;

[0022] Step 2: Connect the bolt holes at the ends of the floating pipes with the bottom precast blocks of the power generation unit columns by bolts;

[0023] Step 3: Deploy an operation and maintenance walkway at the upper edge position of the connection between the bottom precast block and the floating pipe, and simply fix it with bolts;

[0024] Step 4: Install templates at the connections of the bottom precast block, floating pipe and operation and maintenance walkway, pour and form with UHPC material, and wait for the UHPC material to dry and reach the design strength before removing the templates;

[0025] Step 5: Install supporting equipment;

[0026] Step 6: Assemble the end brackets and cross beams of the photovoltaic support, and install photovoltaic modules in sequence at the cross beam structure using common photovoltaic module edge clamps, middle clamps and bolts;

[0027] Step 7: Lift the photovoltaic support and photovoltaic modules to the top of the power generation unit column through a hoisting device to complete the assembly of the photovoltaic power generation unit;

[0028] Step 8: Hoist the entire photovoltaic power generation unit into the water, and then connect adjacent photovoltaic power generation units to form a photovoltaic array.

[0029] The floating offshore photovoltaic platform applicable to the marine environment provided by the present invention and its manufacturing method use UHPC material to make floating pipes, power generation unit columns and end cast-in-place connection structures. While meeting the hydrodynamic performance indicators of the marine environment, it can greatly reduce the steel consumption and project cost. At the same time, the anti-corrosion characteristics of this material effectively solve the risk that the metal coating needs to be regularly inspected, otherwise the coating peeling will cause the overall failure of the system. The raft structure design of the base can effectively reduce the mechanical action of wave loads on the system structure, and the cylindrical floating pipes can dissipate waves; the end cast-in-place connection structure is in the form of on-site casting, forming an integrated structure of floating pipes, operation and maintenance walkways and power generation unit columns, with better mechanical properties; the photovoltaic brackets are fixed in the form of integrated installation and splicing after installation, effectively improving the construction efficiency and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0031] Figure 1 It is the photovoltaic array structure diagram of the floating offshore photovoltaic platform applicable to the marine environment of the present invention;

[0032] Figure 2 It is the structure diagram of the photovoltaic power generation unit of the floating offshore photovoltaic platform applicable to the marine environment of the present invention;

[0033] Figure 3 It is the structure diagram of the photovoltaic power generation unit of the floating offshore photovoltaic platform applicable to the marine environment of the present invention from another angle;

[0034] Figure 4 It is the structure diagram of the photovoltaic power generation unit of the floating offshore photovoltaic platform applicable to the marine environment of the present invention from another angle;

[0035] Figure 5 It is the side structure diagram of the photovoltaic power generation unit of the floating offshore photovoltaic platform applicable to the marine environment of the present invention;

[0036] Figure 6 It is the exploded view structure diagram of the floating offshore photovoltaic platform applicable to the marine environment of the present invention;

[0037] Figure 7 It is Figure 6 The enlarged view of part A in

[0038] Figure 8 It is Figure 6 The partial exploded view of part A in

[0039] Among them, the markings in each attached drawing are as follows:

[0040] 1 - Photovoltaic array, 11 - Photovoltaic power generation unit, 111 - Power generation unit column, 112 - Photovoltaic bracket, 1121 - End bracket, 1122 - Cross beam, 113 - Floating pipe, 114 - Operation and maintenance walkway, 115 - End cast-in-place connection structure, 116 - Waterproof box, 117 - Photovoltaic module. Specific implementation manners

[0041] The present invention discloses a floating offshore photovoltaic platform applicable to marine environments and a manufacturing method thereof. By using UHPC materials to replace traditional materials, the steel consumption and project cost can be greatly reduced, and the later maintenance is simple. The raft structure design of the base can effectively reduce the mechanical action of wave loads on the system structure, and the cylindrical floating pipes can dissipate waves; the end cast-in-place connection structure adopts a cast-in-place form on-site to form an integrated structure of the floating pipes, the operation and maintenance walkway, and the power generation unit columns, with better mechanical properties; the photovoltaic brackets are fixed in a form of integrated installation and splicing, effectively improving the construction efficiency and reducing the production cost.

[0042] Next, in combination with the attached drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and detailedly described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

[0043] Please refer to Figures 1 to 8 , the present invention provides a floating offshore photovoltaic platform applicable to marine environments, including a photovoltaic array 1, and the photovoltaic array 1 is composed of a plurality of spliced photovoltaic power generation units 11;

[0044] The photovoltaic power generation unit 11 includes a base that can float on the water surface, four power generation unit columns 111 fixed vertically on the base, and a photovoltaic bracket 112 installed on the tops of the four power generation unit columns 111;

[0045] The base is composed of four spliced floating pipes 113, and the four floating pipes 113 are connected end to end to form a closed rectangular frame structure; the four power generation unit columns 111 are respectively arranged at the four corners of the rectangular frame structure; a maintenance walkway 114 is arranged on the top of the floating pipe 113; end cast-in-place connection structures 115 are respectively arranged at the four corners of the base; the end cast-in-place connection structures 115 are respectively connected to the floating pipes 113 on both sides, the maintenance walkways 114 on both sides, and the power generation unit columns 111 on the top;

[0046] A waterproof box 116 is provided on one of the four power generation unit columns 111, and energy storage devices and inverter devices are provided inside the waterproof box 116; a maintenance and repair walkway 114 is provided between two adjacent end connection mechanisms;

[0047] The photovoltaic support 112 is provided with photovoltaic modules 117.

[0048] In view of the problems existing in the prior art that the current offshore floating photovoltaic system mostly uses the HDPE floating box structure and the semi-submersible steel platform structure as supports, there are problems such as low survivability in extreme weather (HDPE floating box structure), many structural connection points are prone to fatigue failure (HDPE floating box structure), large steel consumption and high construction cost (semi-submersible steel platform), poor adaptability to the warm, humid, polluted and corrosive environment and easy corrosion failure (semi-submersible steel platform), etc. For this reason, the embodiments of the present invention propose a floating offshore photovoltaic platform applicable to the marine environment, which can ensure stable operation in the complex marine environment while reducing material costs and improving construction efficiency.

[0049] In the embodiment of the present invention, the photovoltaic array 1 is composed of a plurality of photovoltaic power generation units 11 spliced together. Specifically, the smallest unit in the photovoltaic array 1 is the photovoltaic power generation unit 11. Every four photovoltaic power generation units 11 are arranged in a square shape to form a small array unit, and then according to the needs of the on-site environment, the small array units are arranged in a certain way to form the photovoltaic array 1. For example, four small array units are arranged in a square shape to form a 4*4 power generation array, or two small array units can be arranged side by side to form a 2*4 power generation array.

[0050] In a specific photovoltaic power generation unit 11, it includes floating pipes 113, a maintenance and repair walkway 114, power generation unit columns 111, end cast-in-place connection structures 115, photovoltaic supports 112, photovoltaic modules 117, a waterproof box 116, energy storage devices and inverter devices. The four floating pipes 113 are in a square structure and form a base that can float on the water surface. The base is located at the bottom of the entire system structure. The maintenance and repair walkway 114 is located above the floating pipes 113 and is deployed along the length direction of the floating pipes 113. The power generation unit columns 111 are located at the four corners of the frame structure formed by the splicing of the floating pipes 113 and are connected to the floating pipes 113 and the maintenance and repair walkway 114 through the end cast-in-place connection structures 115. The photovoltaic supports 112 are located at the upper ends of the power generation unit columns 111, and the photovoltaic modules 117 are on the photovoltaic supports 112. The supporting energy storage devices and inverter devices are mechanically connected to the power generation unit columns 111 through a marine environment special waterproof box 116 with an IP68 or above waterproof level.

[0051] Preferably, the floating pipe 113 is made of UHPC material, its cross-section is circular, its interior is a hollow structure and both ends are closed structures; the wall thickness of the floating pipe 113 is 30 mm, and its interior is filled with polyurethane or foam.

[0052] As a key component for floating the entire system, the floating pipe 113 in this embodiment is made of UHPC material. 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 UHPC material is used to replace and upgrade materials such as HDPE floating boxes and steel casings in the prior art, and the anti-corrosion coating technology in other solutions is replaced with anti-corrosion materials. On the basis of meeting the requirements of hydrodynamic performance indicators, the material performance 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 117 in the system can be effectively protected.

[0053] Furthermore, the floating pipe 113 is processed by a centrifugal process. The cavity and end formed by centrifuging the floating pipe 113 made of UHPC material ensure buoyancy, and the filling with materials such as internal polyurethane or foam ensures that there is still enough buoyancy to support the platform in case of water ingress in extreme cases. Moreover, the cylindrical floating pipe 113 placed horizontally can effectively dissipate waves.

[0054] Preferably, the end cast-in-place connection structure 115 is made by cast-in-place with UHPC material. The end cast-in-place connection structure 115 forms an integrated structure with the connected floating pipe 113, the operation and maintenance walkway 114 and the power generation unit column 111 by cast-in-place. In this embodiment, the end cast-in-place connection structure 115 is also made of UHPC material, and through the cast-in-place method, the already made floating pipe 113, the operation and maintenance walkway 114 and the power generation unit column 111 are firmly integrally connected.

[0055] Preferably, the operation and maintenance walkway 114 is made of UHPC material. The cross-section of the operation and maintenance walkway 114 is in a flat-bottomed inverted U-shaped structure, which includes a walkway board and side walls at both ends of the walkway board; grooves matching the side walls are respectively provided at both ends of the floating pipe 113, 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 walkway 114 is a prefabricated plate-like structure made of UHPC material, and the end is finally integrally connected to the end structure of the floating pipe 113 through forms such as grooves and bolt holes by cast-in-place, and the anti-slip of the upper surface of the operation and maintenance walkway 114 is achieved by pressing patterns.

[0056] Preferably, a slot is provided at the connection between two adjacent floating pipes 113; the power generation unit column 111 is prefabricated from UHPC material, and an insertion block matching the slot is provided at the bottom thereof. 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 111, and the bottom of the photovoltaic bracket 112 is connected to the bolt holes. In this embodiment, the power generation unit column 111 is prefabricated from UHPC material. The bottom is connected to the floating pipe 113 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 floating pipe 113 by in-situ casting, and the upper part is connected to the bottom of the photovoltaic bracket 112 through the pre-buried bolt holes.

[0057] Preferably, the photovoltaic bracket 112 is formed by welding hot-dip galvanized steel or prefabricated from UHPC material; the photovoltaic bracket 112 includes two end brackets 1121 arranged in parallel with each other, and four groups of cross beams 1122 are respectively lapped between the two end brackets 1121; the end brackets 1121 are arranged at an angle with the horizontal plane, and the angle of the angle is 0 to 30°; a plurality of photovoltaic modules 117 are provided, and the plurality of photovoltaic modules 117 are laid on the cross beams 1122 in a tiled form. In this embodiment,

[0058] The structure of the photovoltaic bracket 112 is formed by welding hot-dip galvanized steel or prefabricated from UHPC material. It is inclined at a north-south angle of 0° to 30° according to the difference in sunlight angles in different sea areas. Four groups of cross beams 1122 are lapped on the end brackets 1121 at both ends. The end brackets 1121 and the cross beams can be fixed by a combination of a card slot and bolts. A plurality of photovoltaic modules 117 are carried on the cross beams 1122 in a tiled form. Specifically, the number of photovoltaic modules 117 is 26 to 28.

[0059] Preferably, the photovoltaic module 117 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 beam 1122; a gap is provided between adjacent photovoltaic modules 117. In the embodiment, the photovoltaic module 117 is a double-sided double-glass module, adopting an aluminum frame process, with standard mounting holes on the frame, and can be fixed to the cross beam 1122 in the photovoltaic bracket 112 through mechanical bolts and standard pressing blocks. The photovoltaic module 117 is carried by the photovoltaic bracket 112 and laid at a value between 0° and 30° southward according to different light angles in each sea area. A gap is left both horizontally and vertically between each photovoltaic module 117 to effectively reduce wind resistance.

[0060] Preferably, mooring assemblies are respectively provided at the four corners of the base. The mooring assembly includes a mooring ring, a mooring cable and a mooring anchor; the mooring ring is 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 with the connected mooring ring, floating pipe 113, operation and maintenance walkway 114 and power generation unit column 111 by cast-in-place method.

[0061] In this embodiment, the floating offshore photovoltaic platform further includes a plurality of mooring assemblies, and the plurality of mooring assemblies are distributed at the ends of the cuboid structure formed by the four floating pipes 113. The mooring assembly includes a mooring ring, a mooring cable and a mooring anchor, wherein the mooring ring is embedded in the floating pipe 113 by pouring, and the mooring cable connects the mooring ring and the anchoring point to limit the offshore photovoltaic platform.

[0062] Furthermore, according to the actual marine survey data, the mooring anchor can be a gravity anchor, a drag anchor or a suction anchor.

[0063] Preferably, adjacent photovoltaic power generation units 11 are flexibly connected. In this embodiment, the units are connected in a flexible form to ensure that they do 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.

[0064] A manufacturing method of a floating offshore photovoltaic platform applicable to the marine environment includes the following steps:

[0065] Step 1: Arrange four floating pipes 113 at equal intervals on the same horizontal plane;

[0066] Step 2: Bolt-connect the bolt holes at the ends of the floating pipes 113 to the bottom precast blocks of the power generation unit columns 111;

[0067] Step 3: Deploy the operation and maintenance walkway 114 at the upper edge position of the connection between the bottom precast block and the floating pipe 113, and simply fix it with bolts;

[0068] Step 4: Install formwork at the connection of the bottom precast block, floating pipe 113 and operation and maintenance walkway 114, pour and form with UHPC material, and wait for the UHPC material to dry and reach the design strength before removing the formwork;

[0069] Step 5: Install supporting equipment;

[0070] Step 6: Assemble the end brackets 1121 and cross beams 1122 of the photovoltaic support 112 structure, and install the photovoltaic modules 117 in sequence at the cross beam 1122 structure using the common edge clamps, middle clamps and bolts for photovoltaic modules 117;

[0071] Step 7: Use a hoisting device to place the photovoltaic support 112 and the photovoltaic module 117 at the top of the power generation unit column 111 to complete the assembly of the photovoltaic power generation unit 11;

[0072] Step 8: Hoist the entire photovoltaic power generation unit 11 into the water as a whole, and then connect adjacent photovoltaic power generation units 11 to form a photovoltaic array 1.

[0073] In the present invention, the entire photovoltaic power generation unit 11 can be divided into two major parts. The first part is the foundation part, and the second part is the upper photovoltaic part. When implementing the first part, first place four floating pipes 113 made of UHPC at equal distances on the same horizontal plane, and use the bolt holes at the ends of the floating pipes 113 to connect to the precast blocks at the bottom of the power generation unit column 111 with bolts. After the fixation is completed, deploy horizontal and vertical operation and maintenance walkways 114 at the upper edge position where the column foundation is connected to the floating pipe 113. After simple fixation with bolts, support and pour the external formwork, use UHPC material to pour and form, and wait for the UHPC material to dry and reach the design strength before removing the external formwork. If energy storage and inverter equipment need to be installed, connect and fix them through the waterproof box 116 to the foundation of the power generation unit column 111. Then, the first part of the floating offshore photovoltaic platform applicable to the marine environment described in the present invention is completed.

[0074] Select another location to assemble the end support 1121 and the crossbeam 1122 structures of the photovoltaic support 112 structure. At the crossbeam 1122, use the edge clamps, middle clamps, and bolts of the general-purpose photovoltaic module 117 to install the photovoltaic module 117 in sequence to complete the second part of the floating offshore photovoltaic platform applicable to the marine environment described in the present invention.

[0075] Install the second part at the top of the power generation unit column 111 of the first part through a hoisting device to complete the installation of the present invention. After hoisting the whole into the water, form a photovoltaic array 1 through the connection between the platform structures and the overall mooring.

[0076] In the manufacturing method of the present invention, the form of precast component on-site casting connection is adopted to replace the connection form of a large number of mechanical bolts and plastic earrings in the small arrays in the prior art. The rigid structure form within a single platform effectively avoids the risk of fatigue failure caused by various movements such as wind, waves, currents, and surges in the marine environment, effectively ensuring the stable operation of electronic devices such as the photovoltaic module 117, inverter equipment, and energy storage equipment within the platform. The flexible connection form between platforms ensures that it does not directly confront the wave movement, so as to ensure that the large array system structure reaches the optimal state in adapting to various movements of ocean waves, surges, and currents. In addition, the construction process of on-site splicing and casting followed by overall launching into the water and on-water connection between platforms can greatly improve the construction efficiency.

[0077] The floating offshore photovoltaic platform applicable to the marine environment provided by the present invention and its manufacturing method adopt UHPC material to manufacture floating pipes, power generation unit columns and end cast-in-place connection structures. While meeting the hydrodynamic performance indicators of the marine environment, it can greatly reduce the steel consumption and project cost. At the same time, the anti-corrosion characteristics of this material effectively solve the risk that the metal coating needs to be regularly inspected, otherwise the coating shedding will lead to the overall failure of the system. The raft structure design of the base can effectively reduce the mechanical action of wave loads on the system structure, and the cylindrical floating pipes can dissipate waves; the end cast-in-place connection structure adopts the on-site casting form to form an integrated structure of floating pipes, operation and maintenance walkways and power generation unit columns, with better mechanical properties; the photovoltaic brackets are fixed in the form of post-assembly after integrated installation, effectively improving the construction efficiency and reducing the production cost.

[0078] The above has introduced in detail the floating offshore photovoltaic platform applicable to the marine environment provided by the present invention and its manufacturing method. For those of ordinary skill in the art, according to the idea of the embodiments of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A floating offshore photovoltaic platform suitable for marine environment, characterized in that: It comprises a photovoltaic array (1), wherein the photovoltaic array is composed of a plurality of photovoltaic power generation units (11) spliced ​​together; The photovoltaic power generation unit comprises a base that can float on the water surface, four power generation unit columns (111) fixed to the base in a vertical direction, and a photovoltaic bracket (112) installed on the top of the four power generation unit columns; The base is composed of four floating tubes (113) connected end to end to form a closed rectangular frame structure; four power generation unit columns are respectively arranged at the four corners of the rectangular frame structure; the top of the floating tube is provided with an operation and maintenance walkway (114); the four corners of the base are respectively provided with end cast-in-place connection structures (115); the end cast-in-place connection structures are respectively connected to the floating tubes on both sides, the operation and maintenance walkways on both sides and the power generation unit columns on the top; A waterproof box (116) is arranged on one of the four power generation unit columns, wherein an energy storage device and an inverter device are arranged in the waterproof box; an operation and maintenance walkway is arranged between two adjacent end connection mechanisms; A photovoltaic component (117) is provided on the photovoltaic support.

2. The floating offshore photovoltaic platform suitable for marine environment according to claim 1, characterized in that: The floating tube is made of UHPC material, has a circular cross-section, a hollow structure inside and closed structures at both ends; the wall thickness of the floating tube is 30 mm, and the inside is filled with polyurethane or foam.

3. The floating offshore photovoltaic platform suitable for marine environment 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 floating pipe, operation and maintenance walkway and power generation unit column connected thereto.

4. The floating offshore photovoltaic platform suitable for marine environment according to claim 3, 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 floating tube are respectively provided with grooves matching the side walls, the side walls are inserted into the corresponding grooves, and are fixedly connected to the grooves by bolts; the surface of the walkway board is provided with an anti-slip pattern.

5. The floating offshore photovoltaic platform suitable for marine environment according to claim 3, characterized in that: A slot is provided at the connection between two adjacent 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.

6. The floating offshore photovoltaic platform suitable for marine environment 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 (1121) arranged parallel to each other, and four groups of cross beams (1122) are overlapped between the two end brackets; the end brackets are arranged at an angle with the horizontal plane, and the angle of the angle is 0 to 30 degrees; a plurality of photovoltaic modules are provided, and the plurality of photovoltaic modules are laid on the cross beams in a flat manner.

7. The floating offshore photovoltaic platform suitable for marine environment according to claim 6, characterized in that: The photovoltaic module is a double-sided double-glass module, and an aluminum frame is arranged at its edge; the aluminum frame is provided with mounting holes, and bolts are arranged on the mounting holes to connect with corresponding beams; gaps are arranged between adjacent photovoltaic modules.

8. The floating offshore photovoltaic platform suitable for marine environment according to claim 3, 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, floating pipe, operation and maintenance walkway and power generation unit column connected thereto by cast-in-place.

9. The floating offshore photovoltaic platform suitable for marine environment according to claim 1, characterized in that: Adjacent photovoltaic power generation units are connected flexibly.

10. The floating offshore photovoltaic platform suitable for marine environment and the manufacturing method thereof according to any one of claims 1 to 9, characterized in that: The following steps are included: Step 1: Place four floating tubes at equal distances on the same horizontal plane; Step 2: Bolt the bolt holes at the ends of the floating tubes to the bottom prefabricated blocks of the power generation unit columns; Step 3: Deploy the operation and maintenance walkway at the upper edge of the connection between the bottom prefabricated block and the floating pipe, and simply fix it with bolts; Step 4: Install the formwork at the joints of the bottom prefabricated block, floating pipe and maintenance walkway, cast and mold with UHPC material, and remove the formwork after the UHPC material is dried and solidified to the designed strength; Step 5: Install supporting equipment; Step 6: Assemble the end brackets and crossbeams of the photovoltaic bracket, and use the universal photovoltaic module side pressure blocks, middle pressure blocks and bolts to install the photovoltaic modules in sequence at the crossbeam structure; Step 7: Use the hoisting equipment to place the photovoltaic bracket and photovoltaic modules on the top of the power generation unit column to complete the assembly of the photovoltaic power generation unit; Step 8: hoist the photovoltaic power generation unit into the water as a whole, and then connect adjacent photovoltaic power generation units to form a photovoltaic array.

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