A floating photovoltaic structure based on a hollow concrete frame

Abstract

The utility model discloses a kind of floating photovoltaic structure based on hollow concrete frame, including photovoltaic module and floating frame;Floating frame is a frame body with radial section as regular N-polygon, including chassis and the support frame fixed above chassis;Chassis is made of one center node, N edge nodes, N horizontal bracing and N inclined bracing, support frame is made of N+1 vertical bracing, photovoltaic module is fixed in support frame top by photovoltaic support;Horizontal bracing, inclined bracing and vertical bracing are all concrete pipe body with cavity in center, and both ends are provided with embedded steelwork, its cavity is filled with and full of lightweight filler that is adapted to the volume of cavity;The floating photovoltaic structure has high strength and good stability, can effectively withstand wind, wave, flow and other natural load, ensure the long-term stable operation of power station, and by applying hollow concrete structure can greatly reduce the construction cost of floating photovoltaic, can be widely used in water surface, lake, offshore, open-sea floating photovoltaic field.

Description

Technical Field

[0001] This utility model relates to the field of marine photovoltaic construction technology, and in particular to a floating photovoltaic structure based on a hollow concrete frame. Background Technology

[0002] Against the backdrop of energy transition, floating photovoltaic (PV) power plants, as an emerging clean energy technology, have broad development prospects. The floating system of floating PV systems, including supporting structures such as floating pipes and pontoons, accounts for a significant portion of the cost, generally resulting in a higher overall cost compared to conventional ground-mounted power plants. Hollow concrete frame structures have emerged to address this need. These systems utilize low-cost concrete materials that offer high strength and durability, reducing costs at the material level while ensuring structural performance. Furthermore, this structure is rationally designed. Compared to some complex and expensive traditional structures, it meets the functional requirements of floating PV power plants and, through optimized construction, is expected to reduce costs in construction and subsequent maintenance. This demonstrates a significant cost advantage in realizing the effective utilization of water surface resources for photovoltaic power generation. Utility Model Content

[0003] The purpose of this invention is to provide a floating photovoltaic structure based on a hollow concrete frame that solves the above-mentioned technical problems.

[0004] Therefore, the technical solution of this utility model is as follows:

[0005] A floating photovoltaic structure based on a hollow concrete frame includes photovoltaic modules and a floating frame. The photovoltaic modules are fixed to the floating frame via photovoltaic supports. The floating frame is a frame with a radial cross-section of a regular N-gon, including a base frame and a support frame fixed above the base frame. The base frame consists of a central node, N side nodes, N horizontal braces, and N diagonal braces. The support frame consists of N+1 vertical braces. The horizontal, diagonal, and vertical braces have the same structure, all being concrete tubes with a central cavity and pre-embedded steel parts at both ends. The cavity of the concrete tube is filled with... It is filled with a lightweight filler material that is compatible with the volume of the cavity; the central node is a steel structure with a radial cross section of a regular N-gon, and N diagonal braces are evenly distributed radially along the circumference of the central node, with one end fixed vertically to the side wall of the central node; the side nodes are steel structures, and the other end of the N diagonal braces is fixed vertically to the N side nodes; N horizontal braces are connected between each pair of adjacent side nodes to form a regular N-gon frame; N+1 vertical braces are fixed vertically to the top surface of the central node and the N side nodes; where N is a positive integer greater than or equal to 4.

[0006] Furthermore, the lightweight filler is a cylindrical air bladder filled with gas, which is air or a gas with a density less than air.

[0007] Furthermore, the lightweight filler is foam plastic.

[0008] Furthermore, at least one barrel-shaped float is fitted at intervals on each horizontal support, and at least one barrel-shaped float is fitted on the underside of each vertical support.

[0009] Furthermore, an insert groove is provided on the connection surface between the central node and the diagonal brace and the vertical brace, so that the ends of the diagonal brace and the vertical brace are inserted into the insert groove and welded to fix them; an insert groove is provided on the connection surface between the side node and the horizontal brace, diagonal brace and vertical brace, so that the ends of the horizontal brace, diagonal brace or vertical brace are inserted into the insert groove and welded to fix them.

[0010] Furthermore, PHC pipe piles are used for horizontal, diagonal, and vertical bracing.

[0011] Furthermore, the radial cross-section of the floating frame is a square, a regular hexagon, or a regular octagon.

[0012] Furthermore, in the support frame, the vertical supports have the same height, or the height gradually increases from one side of the floating frame to the other side.

[0013] Furthermore, the photovoltaic support structure adopts a steel mesh support structure or a steel truss support structure, the size and shape of which are adapted to the radial dimensions and shape of the floating frame.

[0014] Furthermore, the photovoltaic bracket is directly fixed to the top of each vertical support, or fixed to the top of each vertical support by clamping and fixing it to the connection nodes at each corner of the photovoltaic bracket.

[0015] Compared with existing technologies, this floating photovoltaic structure based on a hollow concrete frame features a clear force transmission, high strength, and good stability, effectively withstanding natural loads such as wind, waves, and currents, ensuring the long-term stable operation of the power station. Compared with traditional floating pipe or floating box structures, it significantly reduces material and installation costs, and its simple design and convenient connection improve installation efficiency. Considering the good corrosion resistance and durability of concrete, it is also more suitable for long-term use in marine environments, reducing maintenance costs. In addition, the floating frame adopts a modular design, and all components can be prefabricated in the factory, facilitating transportation and installation, and allowing for flexible adjustment of size and shape according to project needs. Furthermore, concrete is environmentally friendly, does not pollute water bodies, meets environmental protection requirements, and can be widely applied to floating photovoltaic fields on water surfaces, lakes, nearshore areas, and offshore areas. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of one side of the floating photovoltaic structure based on a hollow concrete frame in an embodiment of this utility model;

[0017] Figure 2This is a schematic diagram of the other side of the floating photovoltaic structure based on a hollow concrete frame in an embodiment of this utility model;

[0018] Figure 3 This is an enlarged schematic diagram of the base frame of the floating frame in the floating photovoltaic structure based on a hollow concrete frame in an embodiment of this utility model.

[0019] Figure 4 This is a schematic diagram showing the connection between the side nodes and the horizontal braces, and between the side nodes and the diagonal braces of the floating frame in the floating photovoltaic structure based on the hollow concrete frame in an embodiment of this utility model.

[0020] Figure 5 This is a schematic diagram of the split structure of the cross brace in the floating photovoltaic structure based on a hollow concrete frame in an embodiment of this utility model.

[0021] Figure 6 This is a partial cross-sectional view of the cross bracing in a floating photovoltaic structure based on a hollow concrete frame, as described in an embodiment of this utility model. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the following embodiments are by no means intended to limit the present invention.

[0023] See Figure 1 The floating photovoltaic structure based on a hollow concrete frame includes a photovoltaic module 1 and a floating frame 3; the photovoltaic module 1 is fixed to the floating frame 3 by a photovoltaic bracket 2.

[0024] The floating frame 3 is a frame with a radial cross section of regular hexagon, which includes a base frame and a support frame fixed above the base frame; based on this, the base frame is composed of a central node 4, six side nodes 5, six horizontal braces 6 and six diagonal braces 7, and the support frame is composed of seven vertical braces 8.

[0025] Center node 4 is located at the center of the base frame. It is a hollow steel block with a hexagonal radial cross section. Its top surface and six side walls are used for fixed connection with the ends of the diagonal braces and vertical braces.

[0026] The edge node 5 is a hollow steel block with an isosceles trapezoidal radial cross section. Its top surface and three side walls are used to connect and fix the ends of a vertical brace 8, a diagonal brace 7, and two horizontal braces 6. The six edge nodes 5 are evenly distributed around the center node 4 and are set with the small side wall containing the upper base of the trapezoidal cross section facing the center node, so that the small side walls of the six edge nodes 5 are respectively parallel to the six side walls of the center node 4. The edge node 5 is preferably a structure formed by longitudinally splitting the center node 4, so that the ends of the diagonal brace 7 and the two horizontal braces 6 can be vertically fixed to the three side walls of the edge node 5.

[0027] See Figure 3 and Figure 4 Six diagonal braces 7 are radially distributed along the circumference of the central node 4. One end of each diagonal brace 7 is centrally and vertically fixed to one of the six side walls of the central node 4, and the other end is centrally and vertically fixed to the smaller side walls of the six edge nodes 5. Six horizontal braces 6 are respectively arranged between each pair of adjacent edge nodes 5, and both ends of each horizontal brace 6 are vertically fixed to the inclined walls of its two side edge nodes 5.

[0028] See Figure 3 and Figure 4 Seven vertical supports 8 are arranged one by one on the central node 4 and the six side nodes 5 respectively, with the bottom of each vertical support 8 centered and vertically fixed on the top surface of the node below it.

[0029] The horizontal brace 6, the diagonal brace 7, and the vertical brace 8 have the same structure. They all use a concrete pipe with a cavity in the center and pre-embedded steel parts at both ends. The cavity of the concrete pipe is filled with a lightweight filler 10 that is compatible with the volume of the cavity.

[0030] See Figure 5 and Figure 6 The structure of the cross brace 6 is illustrated as an example. The cross brace 6 uses a PHC pipe pile, with pre-embedded steel parts 601 at both ends of the pipe body for welding and fixing to the edge nodes 5. The PHC pipe pile is filled with a cylindrical air bladder adapted to the volume of the cavity, and the cylindrical air bladder is filled with air. Before welding and fixing the cross brace 6 to the two edge nodes 5, it is preferable to seal the inner cavity of the PHC pipe pile with a concrete layer, so that the inner cavity of the pipe body forms a closed chamber to prevent water from entering the pipe body. Compared with a concrete pipe body that is not filled with air bladders but only sealed by a concrete layer, using air bladders to fill the inner cavity of the concrete pipe body also has the advantage of preventing the cross brace from being damaged by prolonged immersion in water, causing water to enter the inner cavity of the pipe body and change the buoyancy of the floating frame 3, thus preventing it from sinking.

[0031] In practical applications, the lengths of the horizontal brace 6, diagonal brace 7, and vertical brace 8 are set to be the same or different according to actual operational needs. The three can be pipe structures with the same diameter or pipe structures with different diameters. The size design of the center node 4 is adapted to the diameter of the diagonal brace 7 and the vertical brace 8 to meet the area requirements for welding and fixing the ends of the diagonal brace 7 and the vertical brace 8 to the wall of the center node 4. The size design of the side node 5 is adapted to the diameter of the horizontal brace 6, diagonal brace 7, and vertical brace 8 to meet the area requirements for welding and fixing the ends of the above three structures to the wall of the side node 5.

[0032] As a preferred technical solution of this embodiment, an insert groove is provided on the connection surface between the central node 4 and the diagonal brace 7 and the vertical brace 8, so that the end of the diagonal brace 7 or the vertical brace 8 is fitted into the insert groove and welded to fix it, thereby increasing the connection strength between the central node 4 and the diagonal brace 7, and between the central node 4 and the vertical brace 8; similarly, an insert groove is provided on the connection surface between the side node 5 and the horizontal brace 6, the diagonal brace 7, and the vertical brace 8, so that the end of the horizontal brace 6, the diagonal brace 7, or the vertical brace 8 is fitted into the insert groove and welded to fix it.

[0033] As another preferred technical solution in this embodiment, two barrel-shaped floats 9 are spaced apart on each horizontal support 6, and a barrel-shaped float 9 is fitted on the lower side of each vertical support 8, so as to further increase the buoyancy of the floating frame 3, so that the floating frame 3 can carry more photovoltaic panels and float on the sea surface.

[0034] In this embodiment, the seven vertical supports 8 in the support frame can have the same height, or the height of the vertical supports 8 can gradually increase from one side of the floating frame 3 to the other side, so that the photovoltaic module fixed on the top of the support frame is set horizontally or tilted, so that the orientation of the photovoltaic module meets its illumination angle requirements.

[0035] Photovoltaic module 1 consists of multiple photovoltaic panels laid flat and fixed to the top of floating frame 3 by photovoltaic support bracket 2; photovoltaic support bracket 2 adopts a steel truss support structure with a hexagonal radial cross-section, and its dimensions are adapted to the radial dimensions of floating frame 3; for example Figures 1-3 As shown, in this embodiment, the photovoltaic support 2 is arranged horizontally, and the top of each vertical support 8 is fixedly connected to the photovoltaic support 2 through a connecting node; specifically, the connecting node is a U-shaped clamp that can be clamped on the outer edge of the photovoltaic support 2, and there are six of them, which are evenly distributed along the circumference and welded and fixed at the six top corners of the photovoltaic support 2; the top of each vertical support 8 is welded and fixed to the bottom surface of the connecting node, so as to realize the fixed connection between the photovoltaic support 2 and the floating frame 3.

[0036] In another embodiment, when the photovoltaic support 2 is set at an angle, the bottom surface of the connection node can be set as an inclined surface adapted to the tilt direction of the photovoltaic support 2, so as to ensure that the top end face of the vertical support 8 abuts against the bottom surface of the connection node and is welded and fixedly connected.

[0037] In practical applications, the specific construction method of this floating photovoltaic structure based on a hollow concrete frame is described as follows:

[0038] S1. In the prefabrication plant, the tubes of the horizontal brace 6, the diagonal brace 7 and the vertical brace 8 are prefabricated according to the actual photovoltaic module assembly needs.

[0039] S2. Fill the precast pipe with lightweight filler 10; taking lightweight filler 10 as an air bladder as an example, fill the air bladder into the pipe, and inflate it after filling so that the air bladder is fully filled inside the hollow concrete component. After quality inspection to prevent air leakage, seal the inner cavities at both ends of the pipe with concrete.

[0040] S3. Install barrel-shaped floats 9 at the corresponding positions of the horizontal support 6 and the vertical support 8, and connect and fix them.

[0041] S4. By connecting the center node 4 and the edge node 5, the horizontal brace 6, the diagonal brace 7 and the vertical brace 8 are spliced ​​together to form the floating frame 3;

[0042] S5. The photovoltaic support 2 is installed on top of the floating frame 3, and then the photovoltaic module 1 is laid and fixed on the photovoltaic support 2.

[0043] S6. Transport the floating photovoltaic structure based on the hollow concrete frame to the offshore operation site. After launching, connect anchor chains at each of the five side nodes of the structure to connect the structure to the seabed and achieve floating fixation.

Claims

1. A floating photovoltaic structure based on a hollow concrete frame, characterized in that, The system includes a photovoltaic module (1) and a floating frame (3); the photovoltaic module (1) is fixed to the floating frame (3) by a photovoltaic bracket (2); the floating frame (3) is a frame with a radial cross section of a regular N-sided polygon, including a base frame and a support frame fixed above the base frame; the base frame consists of a central node (4), N side nodes (5), N horizontal braces (6) and N diagonal braces (7), and the support frame consists of N+1 vertical braces (8). The horizontal braces (6), diagonal braces (7) and vertical braces (8) have the same structure, all of which are concrete pipes with a cavity in the center and pre-embedded steel parts at both ends, and the cavity of the concrete pipe is filled with... The cavity is filled with a lightweight filler (10) that is compatible with its volume; the central node (4) is a steel structure with a radial cross section of a regular N-gon, and N diagonal braces (7) are evenly distributed radially along the circumference of the central node (4), with one end fixed to the side wall of the central node (4); the side nodes (5) are steel structures, and the other end of the N diagonal braces (7) is fixed to the N side nodes (5); N horizontal braces (6) are connected between each two adjacent side nodes (5) to form a regular N-gon frame; N+1 vertical braces (8) are vertically fixed to the top surfaces of the central node (4) and the N side nodes (5).

2. The floating photovoltaic structure based on a hollow concrete frame according to claim 1, characterized in that, The lightweight filler (10) is a cylindrical air bladder filled with gas, which is air or a gas with a density less than that of air.

3. The floating photovoltaic structure based on a hollow concrete frame according to claim 1, characterized in that, The lightweight filler (10) is foam plastic.

4. The floating photovoltaic structure based on a hollow concrete frame according to claim 1, characterized in that, At least one barrel-shaped float (9) is fitted at intervals on each horizontal support (6), and at least one barrel-shaped float (9) is fitted on the underside of each vertical support (8).

5. The floating photovoltaic structure based on a hollow concrete frame according to claim 1, characterized in that, An insert groove is provided on the connection surface between the central node (4) and the diagonal brace (7) and the vertical brace (8), so that the ends of the diagonal brace (7) and the vertical brace (8) are inserted into the insert groove and welded to fix them; an insert groove is provided on the connection surface between the side node (5) and the horizontal brace (6), the diagonal brace (7) and the vertical brace (8), so that the ends of the horizontal brace (6), the diagonal brace (7) or the vertical brace (8) are inserted into the insert groove and welded to fix them.

6. The floating photovoltaic structure based on a hollow concrete frame according to claim 1, characterized in that, The horizontal bracing (6), diagonal bracing (7) and vertical bracing (8) all use PHC pipe piles.

7. The floating photovoltaic structure based on a hollow concrete frame according to claim 1, characterized in that, The radial cross section of the floating frame (3) is a square, a regular hexagon, or a regular octagon.

8. The floating photovoltaic structure based on a hollow concrete frame according to claim 1, characterized in that, In the support frame, the vertical supports (8) have the same height, or the height gradually increases from one side of the floating frame (3) to the other side.

9. The floating photovoltaic structure based on a hollow concrete frame according to claim 1, characterized in that, The photovoltaic support (2) adopts a steel mesh support structure or a steel truss support structure, the size and shape of which are adapted to the radial size and shape of the floating frame (3).

10. The floating photovoltaic structure based on a hollow concrete frame according to claim 1, characterized in that, The photovoltaic bracket (2) is directly fixed to the top of each vertical support (8), or fixed to the top of each vertical support (8) by means of the connection nodes at each corner of the photovoltaic bracket (2).

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