Platform supporting structure suitable for offshore photovoltaic inverter installation and construction method

Abstract

The invention discloses a platform supporting structure suitable for installation of an offshore photovoltaic inverter and a construction method, and belongs to the technical field of offshore photovoltaic power generation. The platform supporting structure comprises a main body structure, a fixing structure, an operation and maintenance overhaul and enclosure structure and an inverter fixing support structure; the main body structure is connected with the steel pipe piles through the fixing structures, and the operation and maintenance overhaul and enclosure structure is arranged on the top of the main body structure. The main body structure comprises a main ring beam, a plurality of cantilever beams are welded to the outer side of the main ring beam, and a secondary ring beam or an inverter fixing support structure is arranged between every two adjacent cantilever beams. Wherein the secondary ring beam and the main ring beam are concentrically and annularly arranged from outside to inside, and the inverter fixing support structures are symmetrically arranged on the two sides of the main body structure. The method is suitable for photovoltaic inverter installation projects in different sea area environments such as shallow sea and deep sea, and the construction efficiency, the structural stability and the later operation and maintenance convenience of offshore photovoltaic power station construction can be remarkably improved.

Description

Technical Field

[0001] This invention belongs to the field of offshore photovoltaic power generation technology, specifically relating to a platform support structure and construction method suitable for the installation of offshore photovoltaic inverters. Background Technology

[0002] As the global energy structure shifts towards cleaner and lower-carbon energy, the development and utilization of renewable energy have received widespread attention, with the photovoltaic power generation industry developing rapidly. With onshore photovoltaic resources gradually reaching saturation, the photovoltaic industry is accelerating its expansion into shallow and even deep-sea areas, and the simultaneous development of wind and solar power at sea is becoming a new industry trend.

[0003] As the core equipment in a photovoltaic power generation system, the inverter is responsible for converting the direct current (DC) generated by photovoltaic modules into alternating current (AC) and feeding it into the power grid. Its operational stability directly determines the power generation efficiency of the entire photovoltaic power station. Unlike terrestrial photovoltaic systems, the installation and operation and maintenance of offshore photovoltaic inverters face many unique challenges: First, the offshore construction environment is harsh, with natural factors such as wind, waves, and tides making on-site operations difficult and risky, and the construction window is limited; second, the inverter and its associated cable wiring have a higher failure rate in the high humidity and high salt spray environment at sea, requiring frequent operation and maintenance, but there is a lack of safe and reliable operating platforms at sea, making it difficult to guarantee the convenience and safety of operation and maintenance personnel; third, traditional terrestrial photovoltaic inverters are mostly installed directly on photovoltaic brackets, and this type of structure does not take into account the load transfer characteristics and corrosion prevention requirements at sea, making it unsuitable for offshore installation scenarios.

[0004] In existing technologies, some offshore photovoltaic projects have attempted to install inverters using steel structure platforms welded on-site. However, this method has significant drawbacks: on-site welding operations are greatly affected by the marine environment, making it difficult to control welding quality; the welding process can also damage the anti-corrosion coating of prefabricated components, creating corrosion dead zones. Furthermore, on-site assembly of components and installation of equipment require multiple steps, resulting in a long construction period and low efficiency. Other solutions utilize bolted prefabricated platforms, but these bolted connections are susceptible to seawater corrosion, leading to decreased structural stability. Frequent bolt replacements are also necessary for later maintenance, increasing operation and maintenance costs. In addition, existing platforms generally lack structural design optimization for inverter replacement needs, limiting the operating space for maintenance personnel when disassembling and replacing inverters, further reducing maintenance efficiency.

[0005] Therefore, there is an urgent need for a support structure and construction method for offshore photovoltaic inverter installation platforms that can adapt to the complex marine environment and take into account the ease of construction, structural stability, corrosion resistance reliability, and ease of operation and maintenance. Summary of the Invention

[0006] To address the problems of traditional on-site welding of steel structure platforms for inverter installation, such as inability to adapt to complex marine environments, inconvenient construction, structural instability, unreliable corrosion protection, and transportation difficulties, this invention provides a platform support structure and construction method suitable for offshore photovoltaic inverter installation. Applicable to photovoltaic inverter installation projects in various marine environments, from shallow to deep sea, this invention can significantly improve the construction efficiency, structural stability, and ease of subsequent operation and maintenance of offshore photovoltaic power plants.

[0007] The technical solution adopted by the present invention for a platform support structure and construction method suitable for the installation of offshore photovoltaic inverters is as follows: A platform support structure suitable for the installation of offshore photovoltaic inverters includes a main structure, a fixing structure, an operation and maintenance and enclosure structure, and an inverter fixing bracket structure; the main structure is connected to steel pipe piles through the fixing structure, and the operation and maintenance and enclosure structure is set on the top of the main structure; The main structure includes a main ring beam, with multiple cantilever beams welded to the outer side of the main ring beam. A secondary ring beam or inverter support secondary beam is provided between two adjacent cantilever beams. The secondary ring beam and the main ring beam are arranged in a concentric ring from the outside to the inside, and the inverter fixing bracket structure is symmetrically arranged on both sides of the main structure.

[0008] A further improvement of the technical solution of the present invention is that: the fixing structure includes a plurality of steel brackets uniformly arranged circumferentially on the steel pipe pile and located below the main ring beam, and rubber gaskets are provided at the contact parts between the bottom of the main ring beam and the top of the steel brackets; wherein, a plurality of pairs of guide plates and a plurality of pairs of positioning plates are uniformly arranged at the bottom of the main ring beam, and a plurality of wedge-shaped plugs are uniformly arranged circumferentially between the main ring beam and the steel pipe pile, and rubber gaskets are provided in the contact range between the wedge-shaped plugs and the steel pipe pile and the main ring beam.

[0009] A further improvement of the technical solution of the present invention is that: each of the wedge plugs includes a steel seat in contact with the main ring beam and a wedge-shaped steel plate in contact with the steel pipe pile; wherein, a rubber gasket is provided on the side of the steel seat in contact with the main ring beam, and a wedge-shaped groove with a gradually decreasing thickness from top to bottom is provided on the side of the steel seat away from the rubber gasket, which is adapted to the wedge-shaped steel plate; rubber gaskets are also provided on the side of the wedge-shaped steel plate in contact with the wedge-shaped groove and the side in contact with the steel pipe pile.

[0010] A further improvement of the technical solution of the present invention is that: the operation, maintenance and enclosure structure includes a fiberglass grating plate laid on the top of the main structure, and the fiberglass grating has a pre-installed openable cover plate; it also includes railings set at the edge of the main structure.

[0011] A further improvement of the technical solution of the present invention is that: the inverter fixing bracket structure includes two vertically arranged inclined columns, the front side of the inclined columns is provided with an inclined front brace, and the two inclined columns are provided with multiple horizontally arranged crossbeams from bottom to top.

[0012] A construction method for a platform support structure suitable for offshore photovoltaic inverter installation, used to manufacture the aforementioned platform support structure, includes the following steps: S1. Process steel components such as main ring beam, cantilever beam, secondary ring beam, inverter support secondary beam, diagonal column, front diagonal brace, and crossbeam in the factory, and process steel pipe piles with steel brackets at the same time; and install rubber gaskets at the contact parts between the bottom of the main ring beam and the steel brackets, as well as at the contact parts between the wedge plug and the steel pipe piles and the main ring beam. S2. Weld the cantilever beam, secondary ring beam, inverter support secondary beam and main ring beam together to form the main structure. Weld the diagonal column, front diagonal brace and crossarm together to form the inverter fixing bracket structure. Weld the inverter fixing bracket structure to the preset position of the main structure. S3. Apply anti-corrosion coating to the assembled main structure, inverter mounting bracket structure and steel pipe piles. S4. Lay fiberglass grating on the top of the main structure and reserve a movable cover plate, and install railings around the perimeter of the main structure; S5. Fix the inverter to the crossarm of the inverter mounting bracket structure; S6. Transport the assembled platform support structure to the dock, and then transport it by ship to the offshore construction site; S7. Lift the platform support structure as a whole, and insert the steel pipe piles through the guide plate and positioning plate so that the main ring beam sits on the steel bracket; S8. Install wedge plugs at the gap between the top of the main ring beam and the steel pipe pile to fix the platform support structure to the steel pipe pile; S9. Check the connection and fixation of each component to complete the construction.

[0013] A further improvement of the technical solution of the present invention is that the anti-corrosion coating in step S3 is applied using a one-time spraying process in the factory to ensure that the coating covers all areas without dead corners.

[0014] A further improvement of the technical solution of the present invention is that: in step S7, the hoisting process is positioned by guide plates and positioning plates to avoid the platform support structure from rotating in a circle when the steel pipe pile is inserted.

[0015] Due to the adoption of the above technical solution, the technical progress achieved by this invention includes: This invention adopts a fully prefabricated steel structure design. The welding and assembly of the platform's main structure and the inverter's mounting bracket structure, as well as the installation of the inverter equipment, are all completed in the factory in one go. Only the entire structure needs to be transported to the construction site by sea for hoisting and fixing. This model minimizes the amount of offshore work, avoids interference from the complex marine environment, and solves the problems of cumbersome and inefficient traditional on-site welding and assembly procedures, thus shortening the construction period.

[0016] The main structure of this invention adopts a closed box-section steel beam, which has strong overall rigidity and load-bearing capacity, and can effectively transfer the load of maintenance personnel and inverter equipment. The fixed structure achieves precise hoisting and positioning of the platform through guide plates and positioning plates, avoiding rotational displacement during hoisting. Then, wedge-shaped plugs are used to compress and tighten the platform with steel brackets to ensure a firm connection between the platform and the steel pipe piles, which can withstand the loads of sea waves and tides. The combination design of railings and fiberglass grating panels in the maintenance and protection structure provides a safe and reliable operating surface for maintenance personnel and reduces operational risks.

[0017] The welding and assembly of the entire structure and the spraying of the anti-corrosion coating of this invention are all completed in the factory, without on-site welding and bolt connections, avoiding damage to the anti-corrosion system caused by on-site operations and ensuring that the anti-corrosion coating covers all areas without dead corners. At the same time, rubber gaskets are installed at the contact points between the main ring beam and the steel bracket, the wedge plug and the steel pipe pile and the main ring beam, which effectively prevents friction and wear between steel structures from damaging the anti-corrosion paint, fundamentally reducing the need for later anti-corrosion maintenance and extending the service life of the entire structure.

[0018] The fiberglass grating plate laid on the top of the platform support structure of this invention is lightweight, high-strength, and corrosion-resistant, and has a reserved openable cover plate to facilitate maintenance personnel to quickly access the platform from the bottom; the spacing of the perimeter railings takes into account both safety protection and equipment replacement needs, solving the problems of narrow maintenance passages and difficult equipment replacement in traditional platforms, reducing maintenance labor intensity and improving maintenance efficiency. Attached Figure Description

[0019] Figure 1 This is a top view schematic diagram of the platform support structure applicable to the installation of offshore photovoltaic inverters according to the present invention. Figure 2 This is a schematic diagram of the inverter fixing bracket structure of the platform support structure applicable to the installation of offshore photovoltaic inverters according to the present invention. Figure 3 This is a front view of the inverter fixing bracket structure of the platform support structure applicable to the installation of offshore photovoltaic inverters according to the present invention; Figure 4 This is a side view of the inverter mounting bracket structure of the platform support structure applicable to the installation of offshore photovoltaic inverters according to the present invention; Figure 5 This is a front view of the fixed structure of the platform support structure applicable to the installation of offshore photovoltaic inverters according to the present invention; Figures 6-7 This is a side view of the fixed structure of the platform support structure applicable to the installation of offshore photovoltaic inverters according to the present invention; Figure 8 This is a schematic diagram of the wedge-shaped plug in the platform support structure applicable to the installation of offshore photovoltaic inverters according to the present invention.

[0020] In the attached diagram: 1. Main structure; 11. Main ring beam; 12. Cantilever beam; 13. Secondary ring beam; 14. Inverter support secondary beam; 2. Fixed structure; 21. Steel bracket; 22. Guide plate; 23. Positioning plate; 24. Wedge plug; 241. Steel seat; 242. Wedge-shaped steel plate; 243. Wedge groove; 3. Operation, maintenance, and enclosure structure; 31. Fiberglass grating; 32. Movable cover plate; 33. Guardrail; 4. Inverter mounting bracket structure; 41. Angled column; 42. Front diagonal brace; 43. Crossarm; 5. Rubber gaskets; 6. Steel pipe piles. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. In the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concepts of this invention.

[0022] Example 1 like Figures 1-8 As shown, this embodiment provides a platform support structure suitable for the installation of offshore photovoltaic inverters, including a main structure 1, a fixed structure 2, an operation and maintenance and enclosure structure 3, and an inverter fixed bracket structure 4. The various systems work together to achieve stable installation and convenient operation and maintenance of the inverter.

[0023] like Figure 1 As shown, the main structure 1, serving as the core load-bearing component of the entire platform, includes one main ring beam 11, eight cantilever beams 12, four secondary ring beams 13, and two inverter support secondary beams 14. The main ring beam 11 is a closed box-section steel beam. The inner diameter of the main ring beam 11 is determined based on the diameter of the steel pipe pile 6, and the inner diameter of the main ring beam 11 is 60mm larger than the outer diameter of the steel pipe pile 6. Therefore, the distance between the inner wall of the main ring beam 11 and the outer wall of the steel pipe pile 6 is 30mm. The cantilever beams 12 are also closed box-section steel beams. The eight cantilever beams 12 are evenly distributed along the circumference of the main ring beam 11, and one end of each cantilever beam 12 is welded to the side of the main ring beam 11 using submerged arc welding. The secondary ring beams 11... 3. Similarly, closed box-section steel beams are used. Four secondary ring beams 13 are welded between adjacent cantilever beams 12 to form a square frame structure, which is used to directly bear the load of maintenance personnel. The load-bearing capacity of a single secondary ring beam 13 is not less than 2kN / m². The inverter support secondary beam 14 is also a closed box-section steel beam. Two secondary beams are set in parallel. One end is welded and fixed to the cantilever beam 12, and the other end extends to the middle of the platform to bear the load of the inverter equipment. Its load-bearing capacity is not less than 200kg. The secondary ring beams 13 and inverter support secondary beams 14 transfer the load to the cantilever beam 12, and then the load is collected by the cantilever beam 12 to the main ring beam 11, and finally transferred to the steel pipe pile 6 by the main ring beam 11.

[0024] like Figure 1 , Figure 5 , Figure 6 and Figure 7 As shown, the fixed structure 2 is used to achieve a reliable connection between the platform support structure and the steel pipe pile 6, including steel brackets 21, guide plates 22, positioning plates 23, wedge plugs 24, and rubber gaskets 5. The steel brackets 21 are right-angled triangular structures, and the number of steel brackets 21 is multiple, such as 4, 6, 8, etc. The steel brackets 21 are manufactured in the factory using submerged arc welding in one operation along with the steel pipe pile 6, and are evenly distributed along the circumference of the steel pipe pile 6. Four pairs of guide plates 22 and four pairs of positioning plates 23 are welded at 45° intervals to the bottom of the main ring beam 11. The guide plates 22 are trapezoidal structures, with their inner sides flush with the inner wall of the main ring beam 11, used to guide the platform to accurately fit into the steel pipe pile 6 during hoisting. The positioning plates 23 are welded perpendicularly to the guide plates 22, used to restrict the rotational freedom of the platform after it is fitted into the steel pipe pile 6. An oil-resistant rubber gasket 5 is provided at the contact point between the bottom of the main ring beam 11 and the top of the steel bracket 21. The gasket is made of nitrile rubber, which has good wear resistance and corrosion resistance, and can prevent the anti-corrosion paint from being damaged due to direct contact and friction between the steel structure and the anti-corrosion paint.

[0025] like Figure 8 As shown, in this embodiment, each wedge plug 24 includes a steel seat 241 that contacts the main ring beam 11 and a wedge-shaped steel plate 242 that contacts the steel pipe pile 6; wherein, a rubber gasket 5 is provided on the side of the steel seat 241 that contacts the main ring beam 11, and a wedge-shaped groove 243 with a gradually decreasing thickness from top to bottom that is adapted to the wedge-shaped steel plate 242 is provided on the side of the steel seat 241 away from the rubber gasket 5. Rubber gaskets 5 are also provided on the side of the wedge-shaped steel plate 242 that contacts the wedge-shaped groove 243 and the side that contacts the steel pipe pile 6. Figure 7 As shown, after the main ring beam 11 is fitted into the steel pipe pile 6 and comes into contact with the bottom of the main ring beam 11 and the steel bracket 21, the steel seat 241 is inserted into the gap between the main ring beam 11 and the steel pipe pile 6, and then the wedge-shaped steel plate 242 is inserted into the wedge-shaped groove 243 of the steel seat 241, thereby fixing the main ring beam 11 onto the steel pipe pile 6.

[0026] like Figure 1As shown, the maintenance and enclosure structure 3 includes fiberglass grating 31 and railings 33, designed to provide safe and convenient conditions for maintenance operations. The fiberglass grating 31 is made of vinyl ester resin or epoxy resin as the matrix and glass fiber as the reinforcing material, and is molded. The fiberglass grating 31 is fixed to the secondary ring beam 13 and cantilever beam 12 of the main structure 1 using special clips, covering the entire top of the platform. A movable cover 32 is reserved near the steel pipe pile 6; the movable cover 32 is connected to the fixed fiberglass grating 31 by hinges and is equipped with a lock, facilitating maintenance personnel to access the platform from the bottom via a ladder. The railing 33 is made of stainless steel. In the regular area, the spacing between the uprights of the railing 33 is 300mm. On the two opposite sides of the platform, two openings with a width of 500mm are symmetrically spaced at 90° intervals. The spacing between the uprights at the openings is adjusted to 500mm, and an openable protective door is provided. The protective door is locked with a latch, which not only ensures the safety of daily operation and maintenance, but also provides sufficient passage for the disassembly and replacement of the inverter.

[0027] like Figure 1-4 As shown, the inverter mounting bracket structure 4 is used to fix the inverter equipment, including two inclined columns 41, a front inclined brace 42, and three crossbeams 43. The inclined columns 41 are made of seamless steel pipes, and the two columns are symmetrically inclined at an angle of 15°. The bottom of the inclined columns 41 is welded to the inverter support secondary beam 14, and the top is connected by a connecting plate. It can directly bear the load of the inverter equipment and ensure the stability of the bracket in the plane through mutual support. The front inclined brace 42 is made of angle steel, with one end welded to the middle of the inclined column 41 and the other end welded to the cantilever beam 12 of the main structure 1, forming a triangular stable structure, which effectively ensures the out-of-plane stability of the inverter mounting bracket. The crossarm 43 is also made of angle steel. The three crossarms 43 are evenly distributed along the height direction of the inclined column 41. The crossarms 43 are welded and fixed to the column. The crossarms 43 have reserved bolt holes for fixing the inverter to the bracket with bolts. At the same time, the space between the crossarms 43 can be used to lay and fix the bottom cable.

[0028] Example 2 This embodiment provides a construction method for a platform support structure suitable for the installation of offshore photovoltaic inverters, including the following steps: S1. In a professional steel structure processing plant, steel is cut according to the design drawings, and steel components such as the main ring beam 11, cantilever beam 12, secondary ring beam 13, inverter support secondary beam 14, diagonal column 41, front diagonal brace 42, and crossbeam 43 are processed. At the same time, steel pipe piles 6 are processed, and steel brackets 21 are welded at the preset height position of the steel pipe piles 6. Before welding the steel brackets 21, the surface of the steel pipe piles 6 needs to be derusted. At the same time, nitrile rubber gaskets 5 are laid on the top of the steel brackets 21. The size of the gaskets matches the top size of the steel brackets 21 and are fixed with adhesive. Fluororubber gaskets 5 are also attached to the two contact sides of the wedge plugs 24.

[0029] S2. Position and weld the processed cantilever beam 12 to the main ring beam 11. Then weld the secondary ring beam 13 between the adjacent cantilever beams 12 to form the main frame. Next, assemble the inverter fixing bracket structure 4. First, weld the bottom of the two inclined columns 41 to the inverter support secondary beam 14 and connect the top through the connecting plate. Then weld the front inclined brace 42 and the crossbeam 43. After the bracket is assembled, weld it as a whole to the preset position of the main structure 1.

[0030] S3. Apply an anti-corrosion coating to the assembled main structure 1, inverter mounting bracket structure 4, and steel pipe piles 6. The spraying process is carried out in a closed spraying workshop using high-pressure airless spraying equipment to ensure a uniform coating, no missed areas, and no pinholes. After spraying, an adhesion test is performed on the coating.

[0031] S4. Weld railing 33 posts onto the cantilever beam 12 of the main structure 1, then install crossbars and protective doors. The welded parts of the railing 33 need to be coated with the same anti-corrosion coating as the main structure 1. Fix the fiberglass grating 31 onto the secondary ring beam 13 and the cantilever beam 12 with stainless steel clips, and finally install the openable cover 32.

[0032] S5. Hoist the inverter onto the platform and align the mounting holes on the bottom of the inverter with the bolt holes on the crossarm 43. Secure the inverter with high-strength bolts. After the inverter is secured, lay the bottom cable into the reserved space between the crossarms 43 and secure it with cable clamps to ensure that the cable is neatly arranged and not under tension.

[0033] S6. The assembled platform support structure is transported from the processing plant to the dock using a flatbed truck. During transportation, steel brackets are used to fix the structure to prevent deformation. At the same time, the steel pipe piles 6 are hoisted onto the transport ship using special lifting equipment. Rubber pads are placed at the bottom of the steel pipe piles 6 to avoid damage to the anti-corrosion coating during transportation.

[0034] S7. A floating crane is used for hoisting operations. Before hoisting, four hoisting points are set on the main structure 1 of the platform. The hoisting points are symmetrically distributed to ensure hoisting balance. After hoisting, the platform posture is slowly adjusted so that the guide plate 22 at the bottom of the main ring beam 11 is aligned with the top of the steel pipe pile 6. The guide plate 22 guides the platform to fit into the steel pipe pile 6 until the bottom of the main ring beam 11 is in close contact with the rubber pad 5 at the top of the steel bracket 21. During the hoisting process, personnel are arranged to assist in positioning near the steel pipe pile 6 to prevent the platform from rotating.

[0035] S8. After the platform is in place, place the four wedge plugs 24 into the gap between the top of the main ring beam 11 and the steel pipe pile 6. Use a hammer to strike the wedge plugs 24 until they are tightly fitted with the steel pipe pile 6 and the main ring beam 11, so as to achieve a firm fixation between the platform and the steel pipe pile 6.

[0036] S9. After construction is completed, a comprehensive inspection of all parts of the platform shall be carried out, including the appearance quality of welds, the integrity of anti-corrosion coating, the reliability of railing 33 connection, the fixing of inverter and the tightness of wedge plug 24, etc. Damaged coatings found during the inspection shall be repaired in a timely manner, and loose connections shall be reinforced to ensure that the platform support structure meets the design requirements and usage needs.

[0037] In the above embodiments, the present invention provides a platform support structure and construction method suitable for offshore photovoltaic inverter installation. The present invention adopts a fully prefabricated steel structure design. The welding and assembly of the main platform structure, the inverter fixing bracket structure, and the inverter equipment installation are all completed in the factory in one go. Only the entire structure needs to be transported to the construction site by sea for hoisting and fixing. This mode minimizes the amount of offshore work, avoids interference from the complex marine environment, and solves the problems of cumbersome and inefficient traditional on-site welding and assembly processes, thus shortening the construction period. The main structure of the present invention uses closed box-section steel beams, which have strong overall rigidity and load-bearing capacity, effectively transferring the loads of maintenance personnel and inverter equipment. The fixing structure uses guide plates and positioning plates to achieve precise hoisting and positioning of the platform, avoiding rotational displacement during hoisting. Wedge-shaped plugs are used to press and tighten the steel bracket supports, ensuring a firm connection between the platform and the steel pipe piles, which can withstand the loads of sea waves and tides. The combination design of railings and fiberglass grating panels in the maintenance and protection structure provides a safe and reliable operating surface for maintenance personnel, reducing operational risks. The welding and assembly of the entire structure of the present invention and its anti-corrosion... The anti-corrosion coating is applied entirely in the factory, eliminating on-site welding and bolt connections. This avoids damage to the anti-corrosion system during on-site operations and ensures comprehensive coverage. Furthermore, rubber gaskets are installed at the contact points between the main ring beam and the steel brackets, the wedge plugs and the steel pipe piles, and the main ring beam. This effectively prevents friction and wear between the steel structures from damaging the anti-corrosion paint, fundamentally reducing the need for subsequent anti-corrosion maintenance and extending the overall service life of the structure. The fiberglass grating on top of the platform support structure is lightweight, high-strength, and corrosion-resistant, and features a pre-installed openable cover for easy access for maintenance personnel from the bottom. The spacing of the perimeter railings balances safety and equipment replacement needs, solving the problems of narrow maintenance access and difficult equipment replacement in traditional platforms, reducing maintenance labor intensity and improving efficiency.

[0038] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the inventive concept should fall within the protection scope of the present invention. All technical contents for which protection is sought in this invention are fully described in the claims.

Claims

1. A platform support structure suitable for the installation of offshore photovoltaic inverters, characterized in that: It includes a main structure (1), a fixed structure (2), an operation and maintenance and enclosure structure (3), and an inverter fixed support structure (4); the main structure (1) is connected to the steel pipe pile (6) through the fixed structure (2), and the operation and maintenance and enclosure structure (3) is set on the top of the main structure (1); The main structure (1) includes a main ring beam (11), and multiple cantilever beams (12) are welded to the outer side of the main ring beam (11) along its radial direction. A secondary ring beam (13) or an inverter support secondary beam (14) is provided between two adjacent cantilever beams (12). The secondary ring beam (13) and the main ring beam (11) are arranged in a concentric ring from the outside to the inside. The inverter fixing bracket structure (4) is symmetrically arranged on both sides of the main structure (1).

2. The platform support structure for offshore photovoltaic inverter installation according to claim 1, characterized in that: The fixed structure (2) includes a plurality of steel brackets (21) evenly arranged on the steel pipe pile (6) and located below the main ring beam (11), and rubber pads (5) are provided at the contact points between the bottom of the main ring beam (11) and the top of the steel brackets (21); wherein, a plurality of guide plates (22) and a plurality of positioning plates (23) are evenly arranged at the bottom of the main ring beam (11), and a plurality of wedge plugs (24) are evenly arranged circumferentially between the main ring beam (11) and the steel pipe pile (6), and rubber pads (5) are provided in the contact range between the wedge plugs (24) and the steel pipe pile (6) and the main ring beam (11).

3. The platform support structure for offshore photovoltaic inverter installation according to claim 2, characterized in that: Each of the wedge plugs (24) includes a steel seat (241) that contacts the main ring beam (11) and a wedge-shaped steel plate (242) that contacts the steel pipe pile (6); wherein, a rubber pad (5) is provided on the side of the steel seat (241) that contacts the main ring beam (11), and a wedge-shaped groove (243) with gradually decreasing thickness from top to bottom that is adapted to the wedge-shaped steel plate (242) is provided on the side of the steel seat (241) that is away from the rubber pad (5), and a rubber pad (5) is also provided on the side of the wedge-shaped steel plate (242) that contacts the wedge-shaped groove (243) and the side that contacts the steel pipe pile (6).

4. The platform support structure for offshore photovoltaic inverter installation according to claim 1, characterized in that: The operation, maintenance and enclosure structure (3) includes a fiberglass grating (31) laid on the top of the main structure (1), and an openable cover plate (32) is reserved on the fiberglass grating; it also includes railings (33) set on the edge of the main structure (1).

5. The platform support structure for offshore photovoltaic inverter installation according to claim 1, characterized in that: The inverter mounting bracket structure (4) includes two vertically arranged diagonal columns (41), with a diagonally arranged front brace (42) on the front side of the diagonal column (41), and multiple horizontally arranged crossbeams (43) on the two diagonal columns (41) from bottom to top.

6. A construction method for a platform support structure suitable for the installation of offshore photovoltaic inverters, characterized in that: Used to manufacture the platform support structure according to any one of claims 1-5 Includes the following steps, S1. Process steel components such as main ring beam (11), cantilever beam (12), secondary ring beam (13), inverter support secondary beam (14), diagonal column (41), front diagonal brace (42), and crossbeam (43) in the factory, and at the same time process steel pipe piles (6) with steel brackets (21); and install rubber pads (5) at the contact parts between the bottom of the main ring beam (11) and the steel brackets (21) and the contact parts between the wedge plug (24) and the steel pipe piles (6) and the main ring beam (11). S2. Weld the cantilever beam (12), secondary ring beam (13), inverter support secondary beam (14) and main ring beam (11) to form the main structure (1). Weld the inclined column (41), front inclined brace (42), and crossbeam (43) to form the inverter fixed bracket structure (4). Weld the inverter fixed bracket structure (4) to the preset position of the main structure (1). S3. Apply anti-corrosion coating to the assembled main structure (1), inverter fixed support structure (4) and steel pipe pile (6); S4. Lay fiberglass grating (31) on the top of the main structure (1) and reserve a movable cover plate (32). Install railings (33) around the main structure (1). S5. Fix the inverter on the crossarm (43) of the inverter mounting bracket structure (4); S6. Transport the assembled platform support structure to the dock, and then transport it by ship to the offshore construction site; S7. The platform support structure is lifted as a whole and the steel pipe pile (6) is inserted through the guide plate (22) and the positioning plate (23) so that the main ring beam (11) sits on the steel bracket (21); S8. Install wedge plugs (24) at the gap between the top of the main ring beam (11) and the steel pipe pile (6) to fix the platform support structure to the steel pipe pile (6); S9. Check the connection and fixation of each component to complete the construction.

7. The construction method for the platform support structure applicable to the installation of offshore photovoltaic inverters according to claim 6, characterized in that: In step S3, the anti-corrosion coating is applied using a one-time spraying process in the factory to ensure that the coating covers all areas without any blind spots.

8. The construction method for the platform support structure applicable to the installation of offshore photovoltaic inverters according to claim 6, characterized in that: In step S7, the hoisting process is positioned by the guide plate (22) and the positioning plate (23) to prevent the platform support structure from rotating when it is fitted into the steel pipe pile (6).

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