Offshore photovoltaic integrated construction box transformer platform structure

Abstract

The utility model provides a kind of offshore photovoltaic integrated construction box transformer platform structure, comprising: erecting on the box transformer platform of sea, it is connected maintenance platform below;Multiple steel pipe piles, connect box transformer platform and are used to support box transformer platform and maintenance platform, and steel pipe pile and box transformer platform are connected by node fixed structure;Cable protection pipe structure, along the axial arrangement of one steel pipe pile, it includes: first cage that is sleeved on steel pipe pile, first cage side fixed connection J type pipe, first cage and steel pipe pile between connecting ring beam fastening device and dovetail clamping groove;Anti-collision structure, along the axial arrangement of another steel pipe pile, it includes: second cage that is sleeved on steel pipe pile, second cage side fixed connection cat ladder and cable pipe, second cage and steel pipe pile between connecting ring beam fastening device and dovetail clamping groove.The platform structure of the utility model has the advantages of reliable structure, strong durability, convenient construction and low cost.

Description

Technical Field

[0001] This utility model relates to the field of offshore photovoltaic power generation technology, specifically to an integrated offshore photovoltaic construction transformer platform structure. Background Technology

[0002] Offshore photovoltaic (PV) power generation, as an emerging method of solar energy utilization, is developing rapidly. However, the complex environmental loads at sea pose significant challenges to the design and construction of PV systems, including box-type transformer platforms. In particular, factors such as wind, waves, salt spray, and freezing in the marine environment require equipment with higher durability and reliability.

[0003] Based on the above, this utility model proposes a marine photovoltaic integrated construction transformer platform structure, which can effectively solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a modular transformer platform structure for integrated offshore photovoltaic systems. This platform structure boasts advantages such as structural reliability, high durability, convenient construction, and low cost.

[0005] This utility model embodiment provides a marine photovoltaic integrated construction transformer substation platform structure, including:

[0006] The transformer substation platform is erected at sea, with a maintenance platform connected below it;

[0007] Multiple steel pipe piles are connected to the transformer substation platform and used to support the transformer substation platform and maintenance platform. The steel pipe piles and the transformer substation platform are connected by a node fixing structure.

[0008] A cable protection pipe structure is arranged along the axial direction of one of the steel pipe piles. The cable protection pipe structure includes: a first cage sleeved on the steel pipe pile, the first cage serving as the frame of the cable protection pipe structure, a J-shaped pipe fixedly connected to the side of the first cage, a ring beam fastening device and a dovetail groove connecting the first cage and the steel pipe pile, the first cage being radially fixed to the steel pipe pile through the ring beam fastening device, and the first cage being axially fixed to the steel pipe pile through the dovetail groove;

[0009] The anti-collision structure is arranged along the axial direction of another steel pipe pile. The anti-collision structure includes: a second cage sleeved on the steel pipe pile, the second cage serving as the frame of the anti-collision structure; a ladder and a mooring pipe fixedly connected to the side of the second cage; a ring beam fastening device and a dovetail groove connecting the second cage and the steel pipe pile; the second cage is radially fixed to the steel pipe pile through the ring beam fastening device; and the second cage is axially fixed to the steel pipe pile through the dovetail groove.

[0010] In one embodiment, the transformer substation platform includes a first bottom bearing frame formed by welding multiple first steel beams, a steel grating is laid on top of the first bottom bearing frame, railings are installed around the bottom bearing frame, and the first bottom bearing frame is connected to steel pipe piles through the node fixing structure.

[0011] In one embodiment, the maintenance platform includes a second bottom support frame composed of multiple second steel beams welded together, a steel grating laid on top of the second bottom support frame, and railings installed around the second bottom support frame.

[0012] In one embodiment, the transformer substation platform is connected to the maintenance platform below by a steel tie rod, and a vertical ladder is provided between the transformer substation platform and the maintenance platform.

[0013] In one embodiment, the node fixing structure includes:

[0014] The node pipe has an upper node plate and a lower node plate welded to its two axial ends, respectively.

[0015] The bottom surface of the lower node plate is fixedly connected to the top surface of the steel pipe pile;

[0016] The upper surface of the upper node plate and the lower surface of the lower node plate are respectively flush-welded to the upper flange and lower flange of the first steel beam of the transformer substation platform.

[0017] A reinforcing web is vertically positioned in the middle of the inner cavity of the node tube, with its upper and lower ends connected to the upper node plate and the lower node plate, respectively, and its two sides connected to the inner wall of the node tube.

[0018] In one embodiment, a cross-shaped node plate is provided at the bottom of the lower node plate to increase node rigidity and facilitate hoisting and alignment. The cross-shaped node plate is connected to the side wall of the steel pipe pile.

[0019] In one embodiment, the first cage includes first ring beams arranged at intervals along the axial direction of the steel pipe pile, with supporting steel pipes connecting adjacent first ring beams, and ring beam fastening devices and dovetail grooves connecting the first ring beams and the steel pipe piles.

[0020] In one embodiment, the second cage includes second ring beams arranged at intervals along the axial direction of the steel pipe pile, with supporting steel pipes connecting adjacent second ring beams, and ring beam fastening devices and dovetail grooves connecting the second ring beams and the steel pipe piles.

[0021] In one embodiment, both the first cage and the second cage are provided with rubber pads.

[0022] In one embodiment, the ladder includes two anti-collision steel pipes connected to the second cage, steps are provided between the two anti-collision steel pipes, and cable-stayed pipes are arranged on the two anti-collision steel pipes.

[0023] The beneficial effects of the marine photovoltaic integrated construction transformer substation platform structure provided in this embodiment of the invention are as follows:

[0024] 1. Steel pipe piles are used as the pile foundation of the structural system. Compared with PHC pipe piles, although the unit price is higher, the pile spacing is larger and the resistance to ice and waves is stronger. It can withstand greater horizontal and vertical loads, allowing the pile spacing to reach 8~16m, thereby reducing the number of piles and making the structure reliable and cost-effective.

[0025] 2. Steel platforms are used as the load-bearing structure for the transformer substation and personnel access. Each platform bears its own equipment load and variable load. The lower maintenance platform is connected to the upper transformer substation platform by steel tie rods, without contacting the steel pipe piles, thus fully utilizing the tensile strength of steel, thereby reducing steel consumption and lowering costs.

[0026] 3. The cable protection pipe structure is similar to the anti-collision structure, consisting of a ring beam and supporting steel pipes forming a first and second cage along the axial direction of the steel pipe pile. J-shaped pipes or ladders are fixed by welding. Rubber gaskets act as impact buffers during installation and use, while the ring beam fastening device ensures a tighter connection between the first and second cages and the steel pipe pile. Both structures are similar and simple, reducing construction difficulty while ensuring structural reliability.

[0027] 4. The structure of this utility model can be constructed as a whole. The steel pipe piles, transformer substation platform, maintenance platform, cable protection pipe structure, and anti-collision structure are welded and bolted together at the onshore processing plant and then transported to the site as a whole. The transformer substation platform and maintenance platform are directly welded to the steel pipe piles after hoisting. The cable protection pipe structure and anti-collision structure are pre-welded to the first and second cages respectively and connected to the steel pipe piles through dovetail grooves, thereby transferring the load to the pile foundation. This utility model eliminates the offshore welding operation for this part of the structure installation, reduces construction difficulty and cost, improves work efficiency, and shortens the construction period. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A plan view of the transformer substation platform provided in an embodiment of this utility model;

[0030] Figure 2 The structural layout diagram of the prefabricated substation platform provided in this embodiment of the utility model;

[0031] Figure 3 A plan view of the maintenance platform provided in an embodiment of this utility model;

[0032] Figure 4 Structural layout diagram of the maintenance platform provided in this embodiment of the utility model;

[0033] Figure 5 A cross-sectional structural layout diagram of the transformer substation platform and maintenance platform provided for embodiments of this utility model;

[0034] Figure 6 A top view of the node fixing structure provided in an embodiment of this utility model;

[0035] Figure 7 A front view of the node fixing structure provided in an embodiment of this utility model;

[0036] Figure 8 A plan view of the cable protection pipe structure provided in this embodiment of the utility model;

[0037] Figure 9 A side view of the cable protection pipe structure provided in an embodiment of this utility model;

[0038] Figure 10 A top view of the cable protection pipe structure provided in this embodiment of the utility model;

[0039] Figure 11 A plan view of the anti-collision structure provided in an embodiment of this utility model;

[0040] Figure 12 A plan view of the ladder provided in an embodiment of this utility model;

[0041] Figure 13 A schematic diagram illustrating the installation of the rubber gasket provided in an embodiment of this utility model;

[0042] Figure 14 This is a schematic diagram of the installation of the ring beam fastening device provided in an embodiment of the present utility model;

[0043] Figure 15 A front view of the dovetail slot provided in an embodiment of this utility model;

[0044] Figure 16 A side view of the dovetail slot provided in an embodiment of this utility model.

[0045] Attached reference numerals: 1-Steel pipe pile; 2-Transformer platform; 3-Maintenance platform; 4-Steel tie rod; 5-Cable protection pipe structure; 6-Anti-collision structure; 7-First steel beam; 8-Steel grating; 9-Upper node plate; 10-Node pipe; 11-Handrail; 12-Straight ladder; 13-First ring beam; 14-Supporting steel pipe; 15-Corner; 16-Ring beam fastening device; 17-Rubber pad; 18-Dovetail groove; 19-Fixing steel pipe; 20-J-shaped pipe; 21-Anti-collision steel pipe; 22-Step; 23-Cable mooring pipe; 24-Lower node plate; 25-Second steel beam; 26-Second ring beam; 27-Reinforced web plate; 28-Cross-shaped node plate; 29-Arc-shaped connecting plate; 30-Bolt connector; 31-Connector; 32-Ladder. Detailed Implementation

[0046] To enable those skilled in the art to better understand the technical solution of this utility model, the preferred embodiments of this utility model are described below in conjunction with specific examples. However, it should be understood that the accompanying drawings are for illustrative purposes only and should not be construed as limiting the present utility model. For better illustration of this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable that some well-known structures and their descriptions may be omitted in the drawings for those skilled in the art. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting the present utility model.

[0047] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0048] like Figures 1 to 5 As shown, a marine photovoltaic integrated construction transformer substation platform structure includes: a transformer substation platform 2 erected at sea, with a maintenance platform 3 connected below it; multiple steel pipe piles 1, connecting the transformer substation platform 2 and supporting the transformer substation platform 2 and the maintenance platform 3, wherein the steel pipe piles 1 and the transformer substation platform 2 are connected by a node fixing structure; a cable protection pipe structure 5 arranged along the axial direction of one of the steel pipe piles 1; and an anti-collision structure 6 arranged along the axial direction of another steel pipe pile 1.

[0049] This embodiment uses four steel pipe piles 1, arranged in two parallel rows with a spacing of 8-16m. These piles primarily bear loads from sea ice and waves, as well as loads transmitted from the transformer substation platform 2, maintenance platform 3, cable protection pipe structure 5, and anti-collision structure 6. The load of the transformer substation platform 2 is transferred to the steel pipe piles 1 via a node fixing structure. The load of the maintenance platform 3 is transferred to the transformer substation platform 2 via steel tie rods, and then further transferred to the steel pipe piles 1 via the node fixing structure.

[0050] like Figure 8-9As shown, the cable protection pipe structure 5 includes a first cage sleeved on the steel pipe pile 1. The first cage serves as the frame of the cable protection pipe structure 5. A J-shaped pipe 20 is fixedly connected to the side of the first cage. The J-shaped pipe 20 is welded to the first cage through a fixing steel pipe 19. A ring beam fastening device 16 and a dovetail groove 18 are connected between the first cage and the steel pipe pile 1. The first cage is radially fixed to the steel pipe pile 1 through the ring beam fastening device 16, and axially fixed to the steel pipe pile 1 through the dovetail groove 18.

[0051] In this embodiment, both the J-shaped tube 20 and the fixed steel tube 19 are made of round steel pipes and are fixed to the first ring beam 13 by welding to ensure the stability of the cable in the J-shaped tube 20. The bottom of the J-shaped tube 20 has a flared opening, and the opening is polished smooth.

[0052] like Figure 11-12 As shown, the anti-collision structure 6 includes a second cage sleeved on the steel pipe pile 1. The second cage serves as the frame of the anti-collision structure 6. The second cage is fixedly connected to the side of the ladder 32 and the cable pipe 23. The ladder 32 is welded to the second cage through the fixing steel pipe 19. The second cage is connected to the steel pipe pile 1 by a ring beam fastening device 16 and a dovetail groove 18. The second cage is radially fixed to the steel pipe pile 1 through the ring beam fastening device 16, and axially fixed to the steel pipe pile 1 through the dovetail groove 18.

[0053] The transformer substation platform 2 includes a first bottom bearing frame constructed from multiple welded first steel beams 7. A steel grating 8 is laid on top of the first bottom bearing frame, and railings 11 are installed around the bottom bearing frame. The first bottom bearing frame is connected to the steel pipe piles 1 through the node fixing structure. The first steel beams 7 are made of H-beams, with their upper flanges flush and welded together. Their longitudinal and transverse distribution forms the structural foundation of the transformer substation platform 2, increasing the overall structural rigidity and preventing excessive deformation that could cause overall instability.

[0054] The maintenance platform 3 includes a second bottom support frame composed of multiple second steel beams 25 welded together. A steel grating 8 is laid on top of the second bottom support frame, and railings 11 are installed around the second bottom support frame. The first steel beams 7 are made of H-beams, with their upper flanges welded together and arranged longitudinally and transversely to form the structural foundation of the maintenance platform 3, increasing the overall structural rigidity and preventing excessive deformation that could cause overall instability.

[0055] The transformer substation platform 2 is connected to the maintenance platform 3 below by steel tie rods 4. A vertical ladder 12 is provided between the transformer substation platform 2 and the maintenance platform 3 for convenient personnel maintenance. The steel tie rods 4 are made of I-beams and are evenly distributed between the transformer substation platform 2 and the maintenance platform 3. Together with the first steel beam 7 and the second steel beam 25, they form a structural frame and are responsible for transferring the load of the lower maintenance platform to the upper transformer substation platform. Finally, the load is transferred to the steel pipe piles 1 through the node fixing structure.

[0056] like Figure 6-7 As shown, the node fixing structure includes: a node tube 10, with an upper node plate 9 and a lower node plate 24 welded to its two axial ends respectively; the bottom surface of the lower node plate 24 is fixedly connected to the top end of the steel pipe pile 1; the upper surface of the upper node plate 9 and the lower surface of the lower node plate 24 are respectively flush-welded to the upper flange and lower flange of the first steel beam 7 of the transformer substation platform 2; and a reinforcing web plate 27, which is vertically disposed in the middle of the inner cavity of the node tube 10, with its upper and lower ends connected to the upper node plate 9 and the lower node plate 24 respectively, and its two sides connected to the inner wall of the node tube 10.

[0057] The bottom of the lower node plate 24 is provided with a cross-shaped node plate 28 to increase the node rigidity and facilitate hoisting alignment. The cross-shaped node plate 28 is not connected to the side wall of the steel pipe pile 1. The cross-shaped node plate 28 acts as a stiffening rib, strengthening the structural rigidity of the node and preventing structural damage during use and hoisting. The cross-shaped node plate 28 has a slope around its perimeter, forming a trapezoidal shape, which facilitates the alignment of the steel platform with the steel pipe pile 1 during offshore hoisting. The node fixing structure is pre-welded in a land-based factory. After the overall transformer substation platform 2 is hoisted above the steel pipe pile 1, the steel pipe pile 1 and the lower node plate 24 are welded and fixed at sea.

[0058] The first cage includes first ring beams 13 arranged at intervals along the axial direction of the steel pipe pile 1, with supporting steel pipes 14 connecting adjacent first ring beams 13, and ring beam fastening devices 16 and dovetail grooves 18 connecting the first ring beams 13 and the steel pipe pile 1.

[0059] The second cage includes second ring beams 26 arranged at intervals along the axial direction of the steel pipe pile 1. A supporting steel pipe 14 is connected between two adjacent second ring beams 26. A ring beam fastening device 16 and a dovetail groove 18 are connected between the second ring beams 26 and the steel pipe pile 1.

[0060] In this embodiment, the first ring beam 13 and the second ring beam 26 are made of rectangular steel, and the supporting steel pipe 14 is made of circular steel pipe.

[0061] Both the first and second cages are equipped with two layers of ring beam fastening devices 16 and rubber gaskets 17. The ring beam fastening devices 16 are arranged at equal intervals in the circumferential direction on the first ring beam 13 and the second ring beam 26 to make the connection between the cage and the steel pipe pile 1 tighter. The rubber gaskets 17 are arranged at equal intervals in the circumferential direction on the first ring beam 13 and the second ring beam 26.

[0062] like Figure 14 As shown, the ring beam fastening device 16 is arranged between the first ring beam 13 or the second ring beam 26 and the corresponding steel pipe pile 1. The ring beam fastening device 16 includes an arc-shaped connecting plate 29, a bolt connector 30, and a connector 31. The arc-shaped connecting plate 29 and the connector 31 are both welded to the corresponding ring beam. The arc-shaped convex surface of the arc-shaped connecting plate 29 abuts against the outer wall of the steel pipe pile 1. The bolt connector 30 is used to adjust the radial distance between the ring beam and the steel pipe pile 1 to ensure that the arc-shaped connecting plate 29 can be pressed against the outer wall of the steel pipe pile 1, so that the connection between the two is tighter.

[0063] like Figure 13 As shown, rubber pads 17 are provided on the first ring beam 13 of the first cage and the second ring beam 26 of the second cage. The rubber pads 17 serve as a collision buffer.

[0064] like Figure 15-16 As shown, a corbel 15 is welded onto the steel pipe pile 1, and the dovetail groove 18 is welded onto both the first ring beam 13 and the second ring beam 26, and is connected to the corbel 15 through the dovetail groove 18.

[0065] The cable protection pipe structure 5 and the anti-collision structure 6 are fixed to the steel pipe pile 1 and the load is transferred by the bracket 15, dovetail groove 18, ring beam fastening device 16, etc., which are pre-welded in the land factory. The overall structural system does not require offshore welding operations, which reduces the construction difficulty and cost.

[0066] The ladder 32 includes two anti-collision steel pipes 21 connected to the second cage, steps 22 are provided between the two anti-collision steel pipes 21, and cable-stayed pipes 23 are arranged on the two anti-collision steel pipes 21. The steps 22 and the cable-stayed pipes 23 are welded to the anti-collision steel pipes 21. In this embodiment, the anti-collision steel pipes 21 and the cable-stayed pipes 23 are both made of round steel pipes, while the steps 22 are made of solid square steel to prevent structural deformation caused during the process of people climbing up.

[0067] In this embodiment, the outer surfaces of the steel pipe pile 1, the transformer substation platform 2, the maintenance platform 3, the steel tie rod 4, the cable protection pipe structure 5, and the anti-collision structure 6 should be coated with marine heavy-duty anti-corrosion paint.

[0068] like Figures 1-16 As shown, the construction steps of this utility model's integrated offshore photovoltaic substation platform structure are as follows:

[0069] S1. Construction of steel pipe piles in this embodiment: After the steel pipe pile 1 and the corbel 15 are manufactured and protected against corrosion in the land factory, they are transported to the sea and driven into the sea using a pile driving vessel.

[0070] S2. Construction of the cable protection pipe structure in this embodiment: The first ring beam 13 and the supporting steel pipe 14 are fixed on land by welding. Two layers of ring beam fastening devices 16 and rubber gaskets 17 and one layer of dovetail grooves 18 are installed on the second cage. The steel pipe 19 and J-shaped pipe 20 are welded and fixed on the first cage. After completion, the whole structure is transported to the site, lifted above the steel pipe pile 1, and the dovetail grooves 18 are aligned and locked with the corbels 15 to complete the installation of the structural system.

[0071] S3. Construction of the anti-collision structure in this embodiment: The second ring beam 26 and the supporting steel pipe 14 are fixed on land by welding, and two layers of ring beam fastening devices 16 and rubber pads 17 and one layer of dovetail grooves 18 are installed on the first cage. The anti-collision steel pipe 21 is first welded and fixed to the steps 22 and the mooring pipe 23, and then welded and fixed to the second ring beam 26. After completion, the whole structure is transported to the site, lifted above the steel pipe pile 1, and the dovetail grooves 18 are aligned and locked with the corbels 15 to complete the installation of the structural system.

[0072] S4. Construction of the transformer substation platform, maintenance platform and steel tie rod in this embodiment: Each component in the transformer substation platform 2, maintenance platform 3 and steel tie rod 3 is processed and welded on land according to the design requirements to form a spatial grid structure. After anti-corrosion treatment, it is transported to the sea for construction. The structure is then welded to the top of the steel pipe pile 1 through the node fixing structure to complete the installation of the structural system.

[0073] Based on the description and accompanying drawings of this utility model, those skilled in the art can easily manufacture or use the marine photovoltaic integrated construction transformer platform structure of this utility model, and can produce the positive effects described in this utility model.

[0074] Unless otherwise specified, in this utility model, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe orientation or positional relationships in this utility model are for illustrative purposes only and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the accompanying drawings and according to the specific circumstances.

[0075] Unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0076] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A structure for an integrated offshore photovoltaic substation, characterized in that: include: The transformer substation platform is erected at sea, with a maintenance platform connected below it; Multiple steel pipe piles are connected to the transformer substation platform and used to support the transformer substation platform and maintenance platform. The steel pipe piles and the transformer substation platform are connected by a node fixing structure. A cable protection pipe structure is arranged along the axial direction of one of the steel pipe piles. The cable protection pipe structure includes: a first cage sleeved on the steel pipe pile, the first cage serving as the frame of the cable protection pipe structure, a J-shaped pipe fixedly connected to the side of the first cage, a ring beam fastening device and a dovetail groove connecting the first cage and the steel pipe pile, the first cage being radially fixed to the steel pipe pile through the ring beam fastening device, and the first cage being axially fixed to the steel pipe pile through the dovetail groove; The anti-collision structure is arranged along the axial direction of another steel pipe pile. The anti-collision structure includes: a second cage sleeved on the steel pipe pile, the second cage serving as the frame of the anti-collision structure; a ladder and a mooring pipe fixedly connected to the side of the second cage; a ring beam fastening device and a dovetail groove connecting the second cage and the steel pipe pile; the second cage is radially fixed to the steel pipe pile through the ring beam fastening device; and the second cage is axially fixed to the steel pipe pile through the dovetail groove.

2. The offshore photovoltaic integrated construction transformer substation platform structure according to claim 1, characterized in that: The transformer substation platform includes a first bottom bearing frame formed by welding multiple first steel beams. A steel grating is laid on top of the first bottom bearing frame, and railings are installed around the bottom bearing frame. The first bottom bearing frame is connected to steel pipe piles through the node fixing structure.

3. The offshore photovoltaic integrated construction transformer substation platform structure according to claim 1, characterized in that: The maintenance platform includes a second bottom support frame composed of multiple welded second steel beams, a steel grating laid on top of the second bottom support frame, and railings installed around the second bottom support frame.

4. The offshore photovoltaic integrated construction transformer substation platform structure according to claim 1, characterized in that: The transformer substation platform is connected to the maintenance platform below by steel tie rods, and a vertical ladder is installed between the transformer substation platform and the maintenance platform.

5. The offshore photovoltaic integrated construction transformer substation platform structure according to claim 1, characterized in that: The node fixing structure includes: The node pipe has an upper node plate and a lower node plate welded to its two axial ends, respectively. The bottom surface of the lower node plate is fixedly connected to the top surface of the steel pipe pile; The upper surface of the upper node plate and the lower surface of the lower node plate are respectively flush-welded to the upper flange and lower flange of the first steel beam of the transformer substation platform. A reinforcing web is vertically positioned in the middle of the inner cavity of the node tube, with its upper and lower ends connected to the upper node plate and the lower node plate, respectively, and its two sides connected to the inner wall of the node tube.

6. The offshore photovoltaic integrated construction transformer substation platform structure according to claim 5, characterized in that: A cross-shaped node plate is provided at the bottom of the lower node plate.

7. The offshore photovoltaic integrated construction transformer substation platform structure according to claim 1, characterized in that: The first cage includes first ring beams arranged at intervals along the axial direction of the steel pipe pile, with supporting steel pipes connecting two adjacent first ring beams, and ring beam fastening devices and dovetail grooves connecting the first ring beams and the steel pipe piles.

8. The offshore photovoltaic integrated construction transformer substation platform structure according to claim 1, characterized in that: The second cage includes second ring beams arranged at intervals along the axial direction of the steel pipe pile, with supporting steel pipes connecting adjacent second ring beams, and ring beam fastening devices and dovetail grooves connecting the second ring beams and the steel pipe piles.

9. The offshore photovoltaic integrated construction transformer substation platform structure according to claim 1, characterized in that: Both the first and second cages are equipped with rubber pads.

10. The offshore photovoltaic integrated construction transformer substation platform structure according to claim 1, characterized in that: The ladder includes two anti-collision steel pipes connected to the second cage, steps are set between the two anti-collision steel pipes, and cable-tying pipes are arranged on the two anti-collision steel pipes.

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