A large-span flexible photovoltaic support system in marine environment

Abstract

The utility model discloses a kind of ocean environment large-span flexible photovoltaic support systems, including foundation, main steel frame and cable body, the foundation adopts steel pipe concrete pile foundation, the main steel frame is installed on foundation, the cable body is installed on main steel frame, the cable body is fixed by rigid strut connection between the cable body, the cable body adopts two parallel load-bearing cable and a stable cable that resists wind suction effect composition, load-bearing cable and stable cable between by tensioning carbon fiber cable body prestress form self-balancing system, the cable body is made of lightweight high-strength and corrosion-resistant carbon fiber composite material. The utility model relates to offshore photovoltaic power generation technical field, and the system solves the problems of traditional rigid offshore photovoltaic support construction difficulty, high cost, small span, poor corrosion resistance by innovative structure design and material selection, realizes the characteristics of offshore photovoltaic support large span, high stability, strong corrosion resistance.

Description

Technical Field

[0001] This utility model relates to the field of marine photovoltaic power generation technology, specifically a large-span flexible photovoltaic support system for marine environments. Background Technology

[0002] With the gradual development and utilization of photovoltaic projects in mountainous and onshore areas, land resources are becoming increasingly scarce. Against this backdrop, offshore photovoltaic power stations, with their advantages of not occupying valuable land resources, having unobstructed views from the sea surface and longer hours of sunshine, being able to integrate with the marine economy, and sharing submarine cable and substation facilities with offshore wind power, have become an important development direction in the clean energy sector.

[0003] However, traditional rigid offshore photovoltaic (PV) supports have several drawbacks, such as: complex offshore construction processes, extremely high precision requirements for the offshore hoisting of steel trusses, and stringent demands on construction equipment and personnel skills; high steel consumption leading to increased material costs; and the fact that chloride ions in seawater and the marine atmosphere accelerate the electrochemical corrosion of metal supports, especially at welded areas and connectors, resulting in insufficient corrosion resistance and rapid corrosion rates in salt spray environments, leading to high subsequent corrosion protection and maintenance costs. Furthermore, the need for numerous pile foundations to meet support requirements further increases overall construction costs. Therefore, the offshore PV sector urgently requires a new type of support system to improve overall structural stability, adapt to larger span structures, enhance corrosion resistance, and improve economic efficiency. Utility Model Content

[0004] In response to the above situation and to overcome the current technical defects, this utility model provides a large-span flexible photovoltaic support system for marine environments. Through innovative structural design and material selection, this system solves the problems of difficult construction, high cost, small span, and poor corrosion resistance of traditional rigid marine photovoltaic supports, and achieves the characteristics of large span, high stability, and strong corrosion resistance of marine photovoltaic supports.

[0005] The technical solution adopted by this utility model is as follows: This solution provides a large-span flexible photovoltaic support system for marine environments, including a foundation, a main steel frame, and cable bodies. The foundation adopts a steel pipe concrete pile foundation. The main steel frame is installed on the foundation, and the cable bodies are installed on the main steel frame. The cable bodies are connected and fixed by rigid struts. The cable bodies consist of two parallel load-bearing cables and one stabilizing cable to resist wind suction. The load-bearing cables and the stabilizing cable form a self-balancing system through prestressing of the carbon fiber cable bodies. The cable bodies are made of lightweight, high-strength, and corrosion-resistant carbon fiber. Made of composite materials, the main steel frame is an arched truss beam structure. The truss beams of the main steel frame are arranged along the arched contour to form a series of upper and lower chords and web members. The upper and lower chords and web members can withstand axial forces, and the tensile and compressive properties of the material enable the bow back and bowstring to form a tension-compression self-balancing system. The arched truss beam is combined with high-strength carbon fiber cables to form a flexible structural system. The overall stiffness and stability are improved by prestressing. The web members of the flexible structural system are connected to the load-bearing cables and stabilizing cables by rigid struts to ensure uniform stress on the cables and enhance structural stability.

[0006] Furthermore, the surface of the cable body is coated with an anti-corrosion coating, which further enhances its corrosion resistance in high-salt, high-humidity marine environments and extends the service life of the cable body.

[0007] Furthermore, the chords and web members of the bow-shaped truss beam are installed by bolts, and it adopts a detachable connection structure, which facilitates sea transportation and on-site assembly and reduces the difficulty of hoisting.

[0008] Furthermore, the rigid strut is made of glass fiber reinforced plastic, which reduces the overall structural weight while also being lightweight, high-strength, and corrosion-resistant.

[0009] Furthermore, the outer wall of the steel-concrete composite pile of the foundation is provided with a coating to prevent marine organism attachment. This coating can reduce the corrosion and resistance of the pile foundation caused by marine organism attachment, thereby reducing maintenance costs.

[0010] The beneficial effects of this invention using the above structure are as follows: The core of the cable is made of carbon fiber composite material, which inherently possesses excellent resistance to marine corrosion, thus mitigating corrosion risks at the material level. Simultaneously, it can be combined with anti-corrosion coatings and anti-biofouling coatings according to actual needs, forming a dual protection system of "material inherent corrosion resistance + coating-assisted protection," effectively isolating structural damage caused by seawater erosion, salt spray corrosion, and marine organism attachment. This design not only reduces the procurement and replacement costs of anti-corrosion materials but also significantly reduces the frequency and cost of subsequent maintenance, substantially extending the service life of the entire system.

[0011] Carbon fiber cables possess high strength properties, enabling large-span support requirements. Arched truss beams significantly reduce self-weight while ensuring structural stability. The combination of these two elements effectively reduces foundation bearing pressure, decreases steel consumption and the number of piles, and addresses the pain points of traditional rigid supports: "small span, numerous piles, and high cost." Overall, the cost is significantly reduced.

[0012] The bow-shaped truss girder adopts a modular design that allows for free assembly and detachable connection. Combined with lightweight carbon fiber cables, it significantly reduces the accuracy requirements and operational difficulty of offshore construction. No complicated procedures are required during construction, and assembly and hoisting can be completed quickly, effectively shortening the construction period. This allows it to better adapt to the complex environment of the sea with its variable winds and waves and limited working space, thereby improving construction efficiency and safety.

[0013] The combination of the arched truss beam tension-compression self-balancing system and the carbon fiber cable prestressed self-balancing system ensures uniform stress distribution in the cables through rigid struts, avoiding localized stress concentration. The in-plane and out-of-plane stiffness of the structure is provided by the pre-tension, resulting in excellent wind and wave resistance and shape stability. At the same time, the arched truss beam members concentrate axial forces, fully utilizing the tensile and compressive properties of the materials and avoiding material waste. The carbon fiber cables themselves possess high strength characteristics, and with the optimized structural design, the entire system meets the requirements of large-span load-bearing while achieving efficient material utilization. This avoids the excessive use of traditional materials due to insufficient strength and reduces performance waste caused by unreasonable structural design. Under the premise of ensuring structural reliability, costs are further controlled, achieving a balance between economy and reliability. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is an overall schematic diagram of the large-span flexible photovoltaic support system for marine environments according to this utility model;

[0016] Figure 2 This is a plan view of the large-span flexible photovoltaic support system for marine environments according to this utility model;

[0017] Figure 3 This is a structural schematic diagram of the large-span flexible photovoltaic support system for marine environments according to this utility model;

[0018] Figure 4 This is a three-dimensional structural diagram of the large-span flexible photovoltaic support system for marine environments according to this utility model;

[0019] Figure 5This is a schematic diagram of the three-dimensional structure of the bow-shaped truss of the large-span flexible photovoltaic support system for marine environments according to this utility model. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions shown in the attached diagram, while the terms “inside” and “outside” refer to the directions toward or away from the geometric center of a specific component, respectively.

[0022] As per the instruction manual Figure 1 As shown in Figure 5, the technical solution adopted by this utility model is as follows: This solution provides a large-span flexible photovoltaic support system for marine environments, including a foundation, a main steel frame, and cable bodies. The foundation adopts a steel pipe concrete pile foundation. The main steel frame is installed on the foundation, and the cable bodies are installed on the main steel frame. The cable bodies are connected and fixed by rigid struts. The cable bodies are composed of two parallel load-bearing cables and one stabilizing cable that resists wind suction. The load-bearing cables and the stabilizing cables form a self-balancing system through prestressing of the carbon fiber cable bodies. The cable bodies are made of lightweight, high-strength, and corrosion-resistant carbon fiber composite materials. The main steel frame is an arched truss beam structure. The truss beams of the main steel frame are arranged along the arched contour to form a series of upper and lower chords and web members. The upper and lower chords and web members can withstand axial forces, and by utilizing the tensile and compressive properties of the materials, the bow back and bowstring form a tension-compression self-balancing system. The arched truss beam is combined with high-strength carbon fiber cables to form a flexible structural system. The overall stiffness and stability are improved by prestressing. Its web members are connected to the load-bearing cables and stabilizing cables by rigid struts to ensure uniform stress on the cables and enhance structural stability.

[0023] In practical use, at the designated offshore photovoltaic installation area, steel-concrete composite piles with anti-marine organism coatings on their outer walls are driven into the seabed to a specified depth as the support foundation for the support system. The number of foundations can be arranged according to the 60-meter span requirement, only supporting the ends of the main steel frame and key nodes. The chords and web members of the arched truss beam are assembled on-site using bolts. After assembly, the arched truss beam is hoisted to the top of the foundation and fixed using offshore hoisting equipment, ensuring that the axis of the truss beam is aligned with the direction of the designated photovoltaic array. Carbon fiber load-bearing cables and stabilizing cables with anti-corrosion coatings are passed through the pre-designed cable holes in the arched truss beam. The two load-bearing cables are arranged parallel below the truss beam, and the stabilizing cables are arranged above the truss beam to resist wind suction. Pre-stress is applied to the load-bearing cables and stabilizing cables using tensioning equipment, so that the cables and the truss beam form a self-leveling structure. The system employs a flexible structure, with real-time monitoring of cable tension and truss beam deformation during tensioning to ensure structural stiffness meets design requirements. Rigid struts made of fiberglass reinforced plastic are installed between the load-bearing cables, stabilizing cables, and truss beam web members to ensure uniform stress distribution on the cables. After the overall structure is installed and commissioned, photovoltaic modules are laid on the support surface formed by the main steel frame and cables, completing the installation of the entire support system. During system operation, the carbon fiber cables and the arched truss beams jointly bear the weight of the photovoltaic modules, wind and wave loads, and tidal forces, with the pre-tension providing structural stiffness to ensure system stability. The carbon fiber material, along with anti-corrosion and anti-biofouling coatings, effectively resists marine corrosion, reducing maintenance needs. If span adjustments or maintenance are required, the bolted truss members and rigid struts can be removed for flexible structural adjustments or component replacements.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, material, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, material, or apparatus.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A large-span flexible photovoltaic support system for marine environments, comprising a foundation, a main steel frame, and a cable system, characterized in that: The foundation adopts a steel pipe concrete pile foundation. The main steel frame is installed on the foundation, and the cable body is installed on the main steel frame. The cable bodies are connected and fixed by rigid struts. The cable body consists of two parallel load-bearing cables and one stabilizing cable to resist wind suction. The load-bearing cables and the stabilizing cable form a self-balancing system through prestressing of the carbon fiber cable body. The cable body is made of lightweight, high-strength, and corrosion-resistant carbon fiber composite material. The main steel frame presents an arched truss beam structure. The truss beams of the main steel frame are arranged along the arched contour to form a series of upper and lower chords and web members. The upper and lower chords and web members can withstand axial forces, and by utilizing the tensile and compressive properties of the materials, the arched back and bowstring form a tension-compression self-balancing system. The arched truss beam and the high-strength carbon fiber cable body combine to form a flexible structural system. The overall stiffness and stability are improved by prestressing tensioning. Its web members are connected to the load-bearing cables and the stabilizing cable through rigid struts.

2. The large-span flexible photovoltaic support system for marine environments according to claim 1, characterized in that: The cable body surface is coated with an anti-corrosion coating, which further enhances its corrosion resistance in high-salt, high-humidity marine environments and extends the service life of the cable body.

3. The large-span flexible photovoltaic support system for marine environments according to claim 1, characterized in that: The chords and web members of the bow-shaped truss beam are installed by bolts, forming a detachable connection structure.

4. A large-span flexible photovoltaic support system for marine environments according to claim 1, characterized in that: The rigid strut is made of glass fiber reinforced plastic, which reduces the overall structural weight while being lightweight, high-strength, and corrosion-resistant.

5. A large-span flexible photovoltaic support system for marine environments according to claim 1, characterized in that: The outer wall of the foundation steel-concrete composite pile is coated with a coating to prevent marine organism adhesion, thereby reducing the corrosion and resistance of the pile foundation caused by marine organisms.

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