Novel modular assembly type supporting structure suitable for offshore photovoltaic platform

Abstract

The invention discloses a novel modular assembly type supporting structure suitable for an offshore photovoltaic platform. The novel modular assembly type supporting structure is characterized by comprising a pile foundation structure, a truss structure, a truss connecting structure and a photovoltaic plate support, the truss structures are mutually connected through the truss connecting structures to form an upper supporting structure; the bottom of the pile foundation structure is fixed, and the top is connected with the upper supporting structure. A photovoltaic panel support used for laying a photovoltaic panel is arranged between the upper supporting structures. Compared with a traditional steel support structure, the inhaul cable and the steel structure are combined, and the advantages that the span is increased, and the number of pile foundations and the number of nodes are reduced are achieved; according to the invention, the safety and reliability of the whole offshore photovoltaic structure are improved; structures of all parts are modularized and standardized, the parts are combined and assembled into a whole in a bolt connection mode, and the device has the advantage of being safe and rapid to mount and dismount.

Description

(I) Technical Field

[0001] This invention belongs to the field of offshore photovoltaic power generation technology, and relates to a pile-based fixed photovoltaic platform support structure. More specifically, it relates to a novel modular prefabricated support structure suitable for offshore photovoltaic platforms. (II) Background Technology

[0003] Marine new energy sources mainly include marine solar energy, wind energy, wave energy, tidal energy, and marine bioenergy. Based on my country's long coastline and vast near-shore waters, the theoretically exploitable marine photovoltaic area reaches approximately 710,000 square kilometers, with the potential to install over 100 gigawatts of marine photovoltaic power. By overcoming the technical challenges of marine photovoltaic power generation and fully utilizing marine solar energy, it is possible to significantly improve the proportion of my country's power generation structure and promote the development of clean energy.

[0004] Currently, offshore photovoltaic (PV) power plants mainly fall into three categories: pile-mounted PV power plants, semi-submersible PV power plants, and floating PV power plants. Considering the development of the solar PV industry deployed in marine environments, pile-mounted PV projects currently possess a certain degree of competitiveness in terms of production efficiency and cost. Pile-mounted PV projects have a relatively complete foundation, supported by onshore PV projects. Furthermore, research on pile-mounted offshore PV projects has a relatively short research cycle, allowing for more rapid application of research results to practical projects.

[0005] Currently, adjacent piles in pile-fixed offshore photovoltaic systems are connected only by a top beam or the overall platform structure. The pile tops and the beams or platform structure are typically hinged. When subjected to lateral wind and wave loads, this creates a frame-like load-bearing system, making it difficult to form a coordinated load-bearing system and resulting in poor resistance to extreme loads. The superstructure of pile-fixed offshore photovoltaic systems mainly includes traditional steel support structures and spatial grid structures. Traditional steel support structures and steel-concrete composite truss structures are primarily used in shallow coastal areas such as tidal flats and have drawbacks such as small spans, numerous nodes, low assembly efficiency, long offshore construction periods, and significant environmental damage. Spatial grid structures suffer from a large number and variety of members and nodes, high construction precision requirements, complex processes, and high maintenance costs after corrosion and damage. (III) Summary of the Invention

[0006] The purpose of this invention is to provide a novel modular prefabricated support structure suitable for offshore photovoltaic platforms, addressing the problems existing in current pile-based fixed photovoltaic platform technology. This invention employs cross-bracing to connect adjacent piles, increasing the lateral resistance of the piles; it uses flexible cables instead of rigid rods to support photovoltaic modules, significantly reducing the number and types of nodes; by incorporating the principle of reconfigurability, it improves the standardization and prefabrication of the support structure, thereby reducing construction work, protecting the marine ecological environment, and offering the advantages of safe and convenient maintenance and replacement. Applying this structure to offshore pile-based fixed photovoltaic platforms is beneficial to the development of my country's offshore photovoltaic industry.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A novel modular prefabricated support structure suitable for offshore photovoltaic platforms includes a pile foundation structure, a truss structure, a truss connection structure, and photovoltaic panel supports. The truss structures are interconnected through the truss connection structure to form an upper support structure. The pile foundation structure is fixed at the bottom and connected to the upper support structure at the top. Photovoltaic panel supports for laying photovoltaic panels are provided between the upper support structures.

[0009] The pile foundation structure is divided into submerged pile foundation and submerged pile foundation, which supports the entire fixed photovoltaic platform. Ear plates are installed on the submerged pile foundation, and the foundation structures are reinforced by inter-pile cross bracing connected to the ear plates. The top of the submerged pile foundation is provided with a pile connection flange for connecting with the upper support structure.

[0010] A supporting rib is provided between the pile connecting flange and the mud-based pile foundation to ensure the compressive strength between the pile connecting flange and the mud-based pile foundation.

[0011] The inter-pile cross bracing is divided into long inter-pile bracing and short inter-pile bracing. The long bracing and short inter-pile bracing are interspersed to form a triangular support with the mud-supported pile foundation, which balances the tensile force, enhances the lateral bearing capacity of the pile foundation structure, and ensures the stability of the overall structure.

[0012] Flanges are provided at the ends of the truss structure and the ends of the truss connection structure, and the flanges are connected by bolts.

[0013] The truss structure is an inverted triangular truss structure composed of chords and web members, and truss connection flanges are provided at the ends of the truss structure.

[0014] The truss structure includes short truss structures and long truss structures of different lengths; the short truss structure is an inverted triangular truss structure composed of short chords and short web members, with short truss connecting flanges welded to its ends; the long truss structure is an inverted triangular truss structure composed of long chords and long web members, with long truss connecting flanges welded to its ends.

[0015] The truss connection structure includes a truss mid-section connection structure and a truss corner connection structure.

[0016] The central connecting structure of the truss consists of a central large steel pipe and a central reinforcing steel pipe, with the central reinforcing steel pipe connecting between the central large steel pipes; the central connecting structure of the truss is T-shaped, with central connecting flanges welded to its three ends.

[0017] The truss corner connection structure consists of corner supporting steel pipes and corner reinforcing steel pipes, with the corner reinforcing steel pipes connected between the corner supporting steel pipes; the truss corner connection structure is L-shaped, with corner connecting flanges welded to its two ends and a large corner flange welded to its bottom.

[0018] The truss structures located at the periphery of the upper support structure are connected by truss corner connection structures, and the truss structures located in the middle are connected by truss middle connection structures. The truss structures are also connected and extended to each other by truss middle connection structures.

[0019] In the upper support structure, the short truss structure located at the periphery is connected to the long truss structure through the truss corner connection structure, the short truss structure located in the middle is connected to the long truss structure through the truss middle connection structure, and the long truss structures are connected to each other through the truss middle connection structure.

[0020] The flanges of the truss structure, truss connection structure, and pile foundation structure are assembled by bolt connections between the flanges.

[0021] The flanges at the ends of the short-axis truss structure, long-axis truss structure, truss mid-section connection structure, and truss corner connection structure are assembled by bolt connections between the flanges.

[0022] The pile connecting flange and the corner large flange of the upper support structure are connected by bolts between the flanges.

[0023] The photovoltaic panel is supported by cables built inside the upper support structure.

[0024] The beneficial effects that this invention can achieve are:

[0025] 1. This invention combines cables with a steel structure, offering advantages over traditional steel support structures in terms of increased span and reduced number of piles and nodes. 2. By using steel cables as a support structure in the foundation structure of fixed offshore photovoltaic (PV) piles, this invention coordinates with the overall structural load-bearing system, enhancing the lateral resistance of the piles and thus increasing the stability of the PV platform against wind and horizontal wave loads, thereby improving the overall safety and reliability of the offshore PV structure. 3. This invention modularizes and standardizes the various structural components, assembling them into a whole through bolted connections. This allows for safe and quick installation and disassembly. When complex sea conditions cause localized damage or breakage, the convenient and quick replaceability greatly ensures the stable operation of the entire PV platform. (iv) Description of the attached drawings

[0026] Figure 1 This is a schematic diagram of the overall structure of a novel modular prefabricated support structure applicable to offshore photovoltaic platforms, as described in this invention.

[0027] Figure 2 This is a schematic diagram of the pile foundation structure of a novel modular prefabricated support structure applicable to offshore photovoltaic platforms, as described in this invention.

[0028] Figure 3 This is a schematic diagram of the upper support structure of a novel modular prefabricated support structure applicable to offshore photovoltaic platforms, as described in this invention.

[0029] Figure 4 This is a schematic diagram of the short-axis truss structure in a novel modular prefabricated support structure applicable to offshore photovoltaic platforms, as described in this invention.

[0030] Figure 5 This is a schematic diagram of the longitudinal truss structure in a novel modular prefabricated support structure applicable to offshore photovoltaic platforms, as described in this invention.

[0031] Figure 6 This is a schematic diagram of the truss mid-section connection structure in a novel modular prefabricated support structure applicable to offshore photovoltaic platforms, as described in this invention.

[0032] Figure 7 This is a schematic diagram of the truss corner connection structure in a novel modular prefabricated support structure applicable to offshore photovoltaic platforms, as described in this invention.

[0033] Figure 8 This is a schematic diagram of the connection between truss structures in a novel modular prefabricated support structure applicable to offshore photovoltaic platforms, as described in this invention.

[0034] Figure 9 This is a schematic diagram showing the connection between the pile foundation structure and the superstructure in a novel modular prefabricated support structure applicable to offshore photovoltaic platforms, as described in this invention.

[0035] In the diagram: 1. Pile foundation structure; 101. Pile foundation under mud; 102. Pile foundation above mud; 103. Pile connection flange; 104. Ear plate; 105. Support rib; 2. Cross bracing between piles; 201. Long bracing between piles; 202. Short bracing between piles; 3. Short truss structure; 301. Short chord; 302. Short web member; 303. Short truss connection flange; 4. Long truss structure; 401. Long chord. 402. Longitudinal web member; 403. Longitudinal truss connecting flange; 5. Truss mid-section connecting structure; 501. Mid-section large steel pipe; 502. Mid-section reinforcing steel pipe; 503. Mid-section connecting flange; 6. Truss corner connecting structure; 601. Corner supporting steel pipe; 602. Corner reinforcing steel pipe; 603. Corner connecting flange; 604. Corner large flange; 7. Cable; 8. Photovoltaic panel; 9. Bolted connection between flanges. (V) Detailed Implementation

[0036] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0037] like Figures 1 to 9 As shown, a novel modular prefabricated support structure suitable for offshore photovoltaic platforms includes a pile foundation structure 1, a truss structure, a truss connection structure, and photovoltaic panel supports. The truss structures are interconnected through the truss connection structure to form an upper support structure. The pile foundation structure 1 is fixed at the bottom and connected to the upper support structure at the top. Photovoltaic panel supports for laying photovoltaic panels 8 are provided between the upper support structures.

[0038] like Figure 2 As shown, the pile foundation structure 1 is divided into a submerged pile foundation 101 and a submerged pile foundation 102, which support the entire fixed photovoltaic platform. Ear plates 104 are provided on the submerged pile foundation 102, and the foundation structures 1 are reinforced by inter-pile cross bracing 2 connected to the ear plates 104. The top of the submerged pile foundation 102 is provided with a pile connection flange 103 for connecting with the upper support structure.

[0039] A supporting rib 105 is provided between the pile connecting flange 103 and the mud-based pile foundation 102 to ensure the compressive strength between the pile connecting flange 103 and the mud-based pile foundation 102.

[0040] The inter-pile cross bracing 2 is divided into long inter-pile bracing 201 and short inter-pile bracing 202. The long bracing 201 and the short inter-pile bracing 202 are arranged in a cross pattern to form a triangular support with the mud-supported pile foundation 102, which balances the tensile force, enhances the lateral bearing capacity of the pile foundation structure 1, and ensures the stability of the overall structure.

[0041] The ends of the truss structure and the ends of the truss connection structure are all provided with flanges, and the flanges are connected by bolts.

[0042] The truss structure is an inverted triangular truss structure composed of chords and web members, and truss connection flanges are provided at the ends of the truss structure.

[0043] The truss structure includes short-direction truss structures 3 and long-direction truss structures 4 of different lengths; the short-direction truss structure 3 (e.g., Figure 4 The structure shown is an inverted triangular truss structure composed of short chord members 301 and short web members 302, with short truss connecting flanges 303 welded to its ends; the long truss structure 4 (as shown) Figure 5 (As shown) is an inverted triangular truss structure composed of longitudinal chord 401 and longitudinal web 402, with longitudinal truss connecting flange 403 welded to its end.

[0044] The truss connection structure includes a central truss connection structure 5 and a corner truss connection structure 6.

[0045] The truss mid-section connecting structure 5 (such as...) Figure 6 (As shown) It is composed of a central large steel pipe 501 and a central reinforcing steel pipe 502, with the central reinforcing steel pipe 502 connected between the central large steel pipes 501; the central connecting structure 5 of the truss is T-shaped, and a central connecting flange 503 is welded to its three ends.

[0046] The corner connection structure 6 of the truss (such as...) Figure 7 (As shown) It is composed of corner support steel pipe 601 and corner reinforcing steel pipe 602, with corner reinforcing steel pipe 602 connected between corner support steel pipe 601; the truss corner connection structure 6 is L-shaped, with corner connection flange 603 welded to its two ends and corner large flange 604 welded to its bottom.

[0047] like Figure 3 As shown, in the upper support structure, the short truss structure 3 located at the periphery and the long truss structure 4 are connected by the truss corner connection structure 6, the short truss structure 3 located at the middle position and the long truss structure 4 are connected by the truss middle connection structure 5, and the long truss structures 4 are connected to each other by the truss middle connection structure 5.

[0048] like Figure 8 As shown, the flanges at the ends of the short truss structure 3, the long truss structure 4, the truss middle connection structure 5, and the truss corner connection structure 6 are assembled by bolt connections 9 between the flanges.

[0049] like Figure 9As shown, the pile connecting flange 103 and the corner large flange 604 of the upper support structure are connected by bolts 9 between the flanges.

[0050] The photovoltaic panel is supported by cables 7 that are built inside the upper support structure to support the photovoltaic panel 8.

[0051] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A novel modular prefabricated support structure suitable for offshore photovoltaic platforms, characterized in that... It includes a pile foundation structure, a truss structure, a truss connection structure, and photovoltaic panel supports; the truss structures are interconnected through the truss connection structure to form an upper support structure; the pile foundation structure is fixed at the bottom and connected to the upper support structure at the top; photovoltaic panel supports for laying photovoltaic panels are provided between the upper support structures.

2. The novel modular prefabricated support structure suitable for offshore photovoltaic platforms according to claim 1, characterized in that... The pile foundation structure is divided into submerged pile foundation and submerged pile foundation, which supports the entire fixed photovoltaic platform. Ear plates are installed on the submerged pile foundation, and the foundation structures are reinforced by inter-pile cross bracing connected to the ear plates. The top of the submerged pile foundation is provided with a pile connection flange for connecting with the upper support structure. A supporting rib is provided between the pile connecting flange and the mud pile foundation.

3. The novel modular prefabricated support structure suitable for offshore photovoltaic platforms according to claim 2, characterized in that... The inter-pile cross bracing is divided into long inter-pile bracing and short inter-pile bracing. The long bracing and short inter-pile bracing are interspersed to form a triangular support with the mud-pile foundation.

4. The novel modular prefabricated support structure suitable for offshore photovoltaic platforms according to claim 1, characterized in that... Flanges are provided at the ends of the truss structure and the ends of the truss connection structure, and the flanges are connected by bolts.

5. A novel modular prefabricated support structure suitable for offshore photovoltaic platforms according to claim 1, characterized in that... The truss structure is an inverted triangular truss structure composed of chords and web members, and truss connection flanges are provided at the ends of the truss structure.

6. A novel modular prefabricated support structure suitable for offshore photovoltaic platforms according to claim 1, characterized in that... The truss connection structure includes a truss mid-section connection structure and a truss corner connection structure.

7. A novel modular prefabricated support structure suitable for offshore photovoltaic platforms according to claim 6, characterized in that... The central connecting structure of the truss consists of a central large steel pipe and a central reinforcing steel pipe, with the central reinforcing steel pipe connecting between the central large steel pipes; the central connecting structure of the truss is T-shaped, with central connecting flanges welded to its three ends.

8. A novel modular prefabricated support structure suitable for offshore photovoltaic platforms according to claim 6, characterized in that... The truss corner connection structure consists of corner supporting steel pipes and corner reinforcing steel pipes, with the corner reinforcing steel pipes connected between the corner supporting steel pipes; the truss corner connection structure is L-shaped, with corner connecting flanges welded to its two ends and a large corner flange welded to its bottom.

9. A novel modular prefabricated support structure suitable for offshore photovoltaic platforms according to claim 1, characterized in that... The truss structures located at the periphery of the upper support structure are connected by truss corner connection structures, and the truss structures located in the middle are connected by truss middle connection structures. The truss structures are also connected and extended to each other by truss middle connection structures.

10. A novel modular prefabricated support structure suitable for offshore photovoltaic platforms according to claim 1, characterized in that... The flanges of the truss structure, truss connection structure, and pile foundation structure are assembled by bolt connections between the flanges. The photovoltaic panel is supported by cables built inside the upper support structure.

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