Maritime floating type photovoltaic supporting structure based on composite material

Abstract

The utility model belongs to the technical field of photovoltaic power generation, and relates to an offshore floating type photovoltaic supporting structure based on composite materials. The supporting structure comprises a floating device and a supporting device. The supporting device is fixed on the floating device and is used for mounting a solar photovoltaic panel; wherein the floating device comprises a longitudinal floating beam, a transverse supporting beam and a plurality of floating air bags; through holes are pre-formed in the longitudinal floating beams, the transverse supporting beams can penetrate through the through holes, and the joints of the transverse supporting beams and the longitudinal floating beams are bonded and fixed through adhesives; the floating air bags are mounted on the longitudinal floating beams; the supporting device is composed of a plurality of trapezoid supports, and the adjacent trapezoid supports are connected and fixed through longitudinal connecting rods and ropes. The supporting structure and the connecting structure are both made of non-metal materials and have the advantages of being light in weight and resistant to corrosion, the service life of the structure can be prolonged, factory standardized production and splicing can be achieved in the production process, production efficiency is improved, construction time and cost are reduced, and quality and consistency of products are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of photovoltaic power generation and relates to an offshore floating photovoltaic support structure. Background Art

[0002] Solar energy is a renewable energy source. Its power generation process produces no greenhouse gases or pollutants, and has virtually no negative environmental impact, making it the best energy option currently available to humanity. The photovoltaic industry, a photovoltaic industry chain developed through the application and development of silicon materials, offers advantages such as safety, reliability, noise-free operation, low pollution, low cost, and a short construction cycle. With increasing global demand for renewable energy and continuous technological innovation, the photovoltaic industry will continue to grow and develop, playing a vital role in the energy sector.

[0003] The photovoltaic industry has flourished in recent years, but the traditional solar industry faces a dilemma. In western China, with its vast land and abundant sunshine, photovoltaic power plants are both low-cost and generate high power. However, due to the long distances between power users, transmission costs are high. In eastern China, where electricity is in high demand, the population density and scarce land resources make large-scale ground-based photovoltaic power plants unprofitable. Therefore, offshore floating photovoltaic power generation is an ideal option for sunny coastal cities. This technology deploys solar photovoltaic panels on floating structures on the sea surface, overcoming the land constraints of traditional ground-based photovoltaic power generation and achieving higher power generation efficiency. Offshore floating photovoltaic power generation fully utilizes marine resources, achieving higher returns on investment and environmental benefits, thus offering significant potential and sustainable development. Currently, the design lifespan of offshore photovoltaic power plants is typically 25 years or longer. The floating structure is crucial to the normal operation and power generation of the entire photovoltaic system. While traditional offshore floating photovoltaic support structures offer low material processing costs, they still suffer from issues such as heavy weight, poor corrosion resistance, and complex installation. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by proposing a composite material-based floating offshore photovoltaic support structure. This structure is lightweight, corrosion-resistant, easy to install, and possesses excellent electrical insulation properties, effectively reducing the electrical connection between the power generation system and the seawater, minimizing the risk of potential electrical failures.

[0005] To achieve the above-mentioned purpose, the utility model provides a composite material-based offshore floating photovoltaic support structure, comprising a floating device and a supporting device; the supporting device is fixed on the floating device and is used to install solar photovoltaic panels; the floating device comprises a longitudinal floating beam, a transverse supporting beam and a plurality of floating airbags; a through hole is preset on the longitudinal floating beam for the insertion of the transverse supporting beam, and the connection between the transverse supporting beam and the longitudinal floating beam is fixed with an adhesive; the floating airbag is connected to the longitudinal floating beam; the supporting device is composed of a plurality of trapezoidal brackets, and adjacent trapezoidal brackets are connected and fixed by longitudinal connecting rods and ropes.

[0006] Preferably, the longitudinal floating beam is a hollow structure, the interior of which is filled with polyurethane foam.

[0007] Preferably, the floating airbag is installed on the longitudinal floating beam through a connecting hoop, and the floating airbag is made of rubber.

[0008] Preferably, the longitudinal floating beam is softly connected to the floating airbag via a connecting ring.

[0009] Preferably, the trapezoidal bracket includes a lower chord, an upper chord, a long vertical web, a short vertical web, a long diagonal web, and a short diagonal web; the lower chord is overlapped with the transverse support beam, and the upper surface of the lower chord is connected to the longitudinal floating beam by bolts; the two ends of the long vertical web, the short vertical web, the long diagonal web, and the short diagonal web are respectively connected to the lower chord and the upper chord by bolts.

[0010] Preferably, an upper longitudinal connecting rod is provided on the upper portion of the trapezoidal bracket; the upper longitudinal connecting rod is arranged along the inclined surface of the trapezoidal bracket, and the upper longitudinal connecting rod is fixed to the upper chord by bolts.

[0011] Preferably, a lower longitudinal connecting rod is provided at the lower portion of the trapezoidal bracket; the lower longitudinal connecting rod is arranged along the bottom surface of the trapezoidal bracket, and the lower longitudinal connecting rod is fixed to the lower chord by bolts.

[0012] Preferably, a middle longitudinal connecting rod is provided in the middle of the trapezoidal bracket, and the middle longitudinal connecting rod is fixed to the long vertical web by bolts.

[0013] Preferably, the longitudinal floating beam, transverse supporting beam, trapezoidal bracket and longitudinal connecting rod are all made of composite materials and have a rectangular cross-section.

[0014] Preferably, the composite material is selected from any one of glass fiber reinforced plastic, basalt fiber reinforced resin, and carbon fiber reinforced matrix composite material.

[0015] Compared with the existing technology, the utility model has the following beneficial effects: the supporting structure and the connecting structure are both made of non-metallic materials, and the composite materials are lightweight and corrosion-resistant, which can increase the service life of the structure in the marine environment; factory standardized production and assembly can be achieved during the structure manufacturing and installation process, which improves production efficiency, reduces construction time and cost, and is conducive to improving product quality and consistency; in addition, by adding floating airbags, the effect of floating on the sea can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an overall schematic diagram of an offshore floating photovoltaic support structure based on composite materials in an embodiment of the present utility model.

[0017] Figure 2 It is a schematic diagram of a trapezoidal bracket;

[0018] Figure 3 It is a schematic diagram of the connection between the longitudinal floating beam, the floating airbag and the connecting ring;

[0019] Figure 4 The figure shows the partial connection details between the longitudinal floating beam, the floating airbag and the connecting ring;

[0020] Figure 5 The following are the detailed drawings of the local connections of the longitudinal floating beam, transverse supporting beam and bottom chord;

[0021] Figure 6 This is a schematic diagram of the connection between the ladder-shaped supports with ropes that also serve as cables;

[0022] Figure 7 It is a schematic diagram of the overall connection between the trapezoidal supports;

[0023] Figure 8 for Figure 7 Partial detail diagram at point A in the middle;

[0024] Figure 9 for Figure 7 Partial detail diagram at B in the middle;

[0025] Figure 10 Schematic diagram of the upper chord and upper longitudinal connecting rod of the trapezoidal support;

[0026] Figure 11 This is a side elevation diagram of the supporting structure after installing photovoltaic panels;

[0027] In the figure: 1. Longitudinal floating beam; 2. Transverse support beam; 3. Trapezoidal bracket; 31. Lower chord; 32. Upper chord; 33. Long vertical web member; 34. Short vertical web member; 35. Long diagonal web member; 36. Short diagonal web member; 4. Floating airbag; 5. Connecting hoop; 6. Connecting ring; 7. Rope; 8. Lower longitudinal connecting rod; 9. Middle longitudinal connecting rod; 10. Upper longitudinal connecting rod; 11. Solar photovoltaic panel. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings. The following description sets forth more details to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in a variety of other ways different from those described herein. For those skilled in the art, any replacement, improvement, or transformation of the embodiments of the present invention is within the scope of protection of the present invention, and the scope of protection of the present invention should not be limited by the content of this specific embodiment. It should be noted that the subsequent drawings are only examples and are not necessarily designed according to the scale and dimensions in the examples, and should not be used as a limitation on the actual scope of protection of the present invention.

[0029] The utility model provides a composite material-based offshore floating photovoltaic support structure, such as Figure 1 As shown, the support structure consists of a floating device and a supporting structure. The floating device is primarily composed of longitudinal floating beams 1 and floating airbags 4, which provide buoyancy. The floating airbags 4 are made of rubber and not only provide buoyancy but also mitigate the impact of collisions between adjacent floating supporting structures. The supporting structure primarily consists of several ladder-shaped supports 3, which are connected to upper longitudinal connecting rods 10 via bolts as brackets for solar photovoltaic panels 11.

[0030] like Figure 2 As shown, the ladder bracket 3 is composed of a lower chord 31, an upper chord 32, a long vertical web member 33, a short vertical web member 34, a long diagonal web member 35, and a short diagonal web member 36, each of which is connected by bolts. The design dimensions of each member in the ladder bracket 3 are determined according to the site and environmental conditions of the location.

[0031] like Figure 3 and Figure 4 As shown, the longitudinal floating beam 1 has rectangular through-holes for the transverse support beam 2. The connection between the transverse support beam 2 and the longitudinal beam 1 is bonded with adhesive to prevent slippage between the transverse support beam 2 and the longitudinal floating beam 1. The longitudinal floating beam 1 is filled with polyurethane foam to prevent local buckling of the larger hollow cross-section of the longitudinal floating beam 1 under external forces. The longitudinal floating beam 1 is connected to the floating airbag 4 via a connecting collar 5 and bolted to several connecting rings 6, which provide flexible connections between the photovoltaic support structure units.

[0032] like Figure 5 and Figure 6 As shown, the lower chord 31 of the trapezoidal bracket 3 is overlapped with the transverse support beam 2, and the upper surface of the lower chord 31 of the trapezoidal bracket 3 is connected to the longitudinal floating beam 1 through bolts.

[0033] like Figure 7 、 Figure 8 、 Figure 9 As shown, the transverse support beam 2 and the lower chord 31 are also tied together with ropes 7. Part of the ropes 7 also serves as tension cables to connect adjacent ladder supports 3. The ladder supports 3 are also connected to the lower longitudinal connecting rods 8 and the middle longitudinal connecting rods 9 by bolts, effectively preventing the ladder supports 3 from tipping out of plane. The ropes 7 are made of synthetic fibers, which can increase service life and improve load-bearing performance.

[0034] like Figure 10 and Figure 11 As shown, an upper longitudinal connecting rod 10 is provided on the upper chord 31 of the trapezoidal support 3. The spacing between the upper longitudinal connecting rod 10 and the adjacent trapezoidal support 3 is determined according to the size of the solar photovoltaic panel 11. The upper longitudinal connecting rod 10, the solar photovoltaic panel 11 and the upper chord 31 are connected by bolts. The upper longitudinal connecting rod 10 and the trapezoidal support 3 form a bracket for the solar photovoltaic panel 11.

[0035] In this utility model, the longitudinal floating beam 1, transverse support beam 2, trapezoidal support 3, lower longitudinal connecting rod 8, middle longitudinal connecting rod 9, and upper longitudinal connecting rod 10 are all made of composite materials with a rectangular hollow cross-section. Composite materials such as glass fiber reinforced plastic (GFRP), basalt fiber reinforced resin (BFRP), and carbon fiber reinforced matrix composite (CFRP) can be used. Composite fiber materials offer properties such as lightness, high strength, and corrosion resistance, making them suitable for seawater environments. Because composite materials have weak compressive and shear properties, fiber orientation affects the mechanical properties of the component. Therefore, the fiber orientation is controlled during the manufacturing process to enhance its tensile properties. The composite structural components are pultruded using a fiber orientation aligned with the axial direction of each member. For longitudinal floating beams 1 with higher design loads, a wire winding process can be used, with the component axial direction as the main axis and layers laid up primarily at angles between 45 and 0 degrees relative to the main axis. The final layer is then heated and cured. The bolts used for connection, as well as the connecting hoop 5 and the connecting ring 6, are made of engineering plastics or other anti-corrosion materials that meet the requirements of strength, ductility and durability, so as to improve the service life of the bolts and the connection performance.

[0036] The above description of the embodiments is intended to facilitate understanding and application of the present invention by those skilled in the art. It will be apparent that those skilled in the art can readily make various modifications to these examples and apply the general principles described herein to other embodiments without requiring creative effort. Therefore, the present invention is not limited to the embodiments described herein. Any improvements or modifications made to the present invention by those skilled in the art based on the disclosure of the present invention should fall within the scope of protection of the present invention.

Claims

1. A composite material-based offshore floating photovoltaic support structure, characterized by: It includes a floating device and a supporting device; the supporting device is fixed on the floating device and is used to install solar photovoltaic panels; the floating device includes a longitudinal floating beam, a transverse supporting beam and a plurality of floating airbags; a through hole is preset on the longitudinal floating beam for the insertion of the transverse supporting beam, and the connection between the transverse supporting beam and the longitudinal floating beam is fixed with adhesive; the floating airbag is installed on the longitudinal floating beam; the supporting device is composed of a plurality of trapezoidal brackets, and adjacent trapezoidal brackets are connected and fixed by longitudinal connecting rods and ropes.

2. The composite material-based offshore floating photovoltaic support structure according to claim 1, characterized in that: The longitudinal floating beam is a hollow structure, the interior of which is filled with polyurethane foam.

3. The composite material-based offshore floating photovoltaic support structure according to claim 1, characterized in that: The floating airbag is installed on the longitudinal floating beam through a connecting hoop, and the floating airbag is made of rubber.

4. The composite material-based offshore floating photovoltaic support structure according to claim 3, characterized in that: The longitudinal floating beam is softly connected to the floating airbag via a connecting ring.

5. The composite material-based offshore floating photovoltaic support structure according to claim 1, characterized in that: The trapezoidal bracket includes a lower chord, an upper chord, a long vertical web, a short vertical web, a long diagonal web, and a short diagonal web; the lower chord is overlapped with the transverse support beam, and the upper surface of the lower chord is connected to the longitudinal floating beam by bolts; the two ends of the long vertical web, the short vertical web, the long diagonal web, and the short diagonal web are respectively connected to the lower chord and the upper chord by bolts.

6. The composite material-based offshore floating photovoltaic support structure according to claim 1, characterized in that: An upper longitudinal connecting rod is provided on the upper part of the trapezoidal bracket; the upper longitudinal connecting rod is arranged along the inclined surface of the trapezoidal bracket, and the upper longitudinal connecting rod is fixed to the upper chord rod by bolts.

7. The composite material-based offshore floating photovoltaic support structure according to claim 1, characterized in that: A lower longitudinal connecting rod is provided at the lower portion of the trapezoidal bracket; the lower longitudinal connecting rod is arranged along the bottom surface of the trapezoidal bracket, and the lower longitudinal connecting rod is fixed to the lower chord rod by bolts.

8. The composite material-based offshore floating photovoltaic support structure according to claim 1, characterized in that: A middle longitudinal connecting rod is provided in the middle of the trapezoidal bracket, and the middle longitudinal connecting rod is fixed to the long vertical web by bolts.

9. The composite material-based offshore floating photovoltaic support structure according to claim 1, characterized in that: The longitudinal floating beam, transverse supporting beam, trapezoidal bracket and longitudinal connecting rod are all made of composite materials and have rectangular cross sections.

10. The composite material-based offshore floating photovoltaic support structure according to claim 9, characterized in that: The composite material is selected from any one of glass fiber reinforced plastic, basalt fiber reinforced resin and carbon fiber reinforced matrix composite material.

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