Magnetic type ultra-large photovoltaic platform jacking device and construction method

Through the magnetically absorbed ultra-large photovoltaic platform top support device, combined with hydraulic jacking device and electromagnetic conversion device, problems such as time-consuming and labor-consuming and easy structure deformation during the docking process of offshore ultra-large photovoltaic platform are solved, and efficient, safe and economical photovoltaic platform docking construction in the intensive array offshore photovoltaic construction area is achieved.

CN119749803APending Publication Date: 2025-04-04THE FIRST COMPARY OF CHINA EIGHTH ENG BUREAU LTD
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Patent Information

Application Number
CN202510171400.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-17
Publication Date
2025-04-04

AI Technical Summary

Technical Problem

The docking process between the existing offshore ultra-large photovoltaic platform and the four-point pile foundation is time-consuming, costly, easy structure deformation, and inability to shrink the lifting equipment, which is particularly prominent in the intensive array offshore photovoltaic construction area.

Method used

The magnetic suction super-large photovoltaic platform top support device is adopted, including a transport ship, a hydraulic suction device, an electromagnetic conversion device, a magnetic suction platform support base and a photovoltaic platform support X-shaped support truss. The vertical movement and docking of the photovoltaic platform are realized through the hydraulic suction device and an electromagnetic conversion device, and the combined structure of the magnetic suction platform supports the base and X-shaped support truss is used to realize the stable suction support and recovery of the photovoltaic platform.

Benefits of technology

The construction task of ultra-large photovoltaic platforms in the intensive array offshore photovoltaic construction area has been realized, avoiding the problem of structural deformation and the inability to shrink the lifting equipment, improving construction efficiency, reducing costs, and reducing the amount of post-maintenance work.

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Abstract

The invention discloses a magnetic type ultra-large photovoltaic platform jacking device and a construction method, and relates to the technical field of photovoltaic platform jacking device construction. Comprising a transport ship, a hydraulic jacking device arranged on the transport ship, an electromagnetic conversion device, a magnetic attraction platform supporting base and a photovoltaic platform supporting X-shaped lifting truss used for fixing a photovoltaic platform. An anchor gear and an anchor chain are further arranged on the transport ship. The magnetic type ultra-large photovoltaic platform jacking device and the construction method have the beneficial effects that the offshore construction cost input can be effectively reduced, meanwhile, it is guaranteed that the photovoltaic platform structure does not deform, and lifting equipment recycling is achieved; and the processes of ship body construction, advancing and the like in the offshore photovoltaic platform intensive arrangement site are reasonably guaranteed.
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Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic platform jacking device construction, and in particular to a magnetic suction type super-large photovoltaic platform jacking device and a construction method. Background Art

[0002] The most difficult and riskiest construction process in pile-based fixed-type marine photovoltaic projects is the docking process between the offshore ultra-large photovoltaic platform and the four-point pile foundation. On the one hand, it is significantly affected by the offshore construction environment, and on the other hand, the entire docking process is time-consuming, labor-intensive, and costly. At the same time, the densely arranged construction of offshore photovoltaic platforms has once again exacerbated the difficulty of docking the platform and the pile foundation.

[0003] At present, the docking process between the platform and the pile foundation of pile-based fixed marine photovoltaic project mainly relies on the lifting operation of large offshore platform ships. This construction method requires a transport ship and a lifting platform ship, which has high construction costs. Secondly, the platform vibrates severely during the lifting process, and the docking process is time-consuming, labor-intensive and has low safety. On the other hand, a floating method suitable for construction in shallow sea areas has emerged at sea. This construction method effectively reduces the construction cost, and the docking task between the platform and the pile foundation can be completed by a transport ship. However, the design of the floating arm equipment is unreasonable, and the coordination of the four-point photovoltaic platform fulcrum position cannot be guaranteed during the jacking process, which is easy to cause structural damage to the photovoltaic platform. At the same time, the floating arm cannot retract the hull as a whole, and cannot be used for construction in densely arranged offshore photovoltaic platform sites.

[0004] How to solve the above problems is the research topic of this program. Summary of the invention

[0005] In order to achieve the above-mentioned purpose of the invention and to address the above-mentioned technical problems, the present invention provides a magnetic type ultra-large photovoltaic platform supporting device and a construction method to solve the problems raised in the above-mentioned background technology that the photovoltaic platform structure is prone to deformation in the current floating support method, the lifting equipment cannot be retracted into the ship, and is not conducive to shuttling in densely arranged offshore photovoltaic platform sites.

[0006] The technical solution is a magnetic super-large photovoltaic platform jacking device, which includes a transport ship, a hydraulic jacking device arranged on the transport ship, an electromagnetic conversion device, a magnetic platform support base, and a photovoltaic platform support X-shaped lifting truss for fixing the photovoltaic platform;

[0007] The transport ship is also equipped with an anchor windlass and anchor chain;

[0008] The magnetic platform support base and the photovoltaic platform support X-shaped lifting truss constitute the jacking mechanism of the photovoltaic platform.

[0009] The photovoltaic platform supporting X-shaped lifting truss includes a rotating hinge structure, a stepped lever arm truss structure and a semi-hoop opening and closing structure;

[0010] The rotary hinge structure comprises two support arms hinged to each other;

[0011] The stepped lever arm truss structure includes a stepped lever arm in a stepped shape, the stepped lever arm is arranged at the end of the support arm, the end of the stepped lever arm is lower than the portion where the stepped lever arm is connected to the support arm, the stepped lever arm is designed according to the hull width of the transport ship and the fulcrum distance of the photovoltaic platform, and the stepped shape can ensure that the descending height of the stepped lever arm is lower than the height of the hull deck, so as to facilitate the docking of the platform with the pile foundation;

[0012] The semi-hoop opening and closing structure includes a support rod, an electric push rod, and a clamp that matches the legs of the photovoltaic platform. The semi-hoop opening and closing structure is similar to a clamp-shaped structure. When closed, it can serve as the main support point of the photovoltaic platform. When the docking is completed, it is disconnected from the photovoltaic platform in the open state.

[0013] The transport ship is connected to the electromagnetic conversion device to supply power to the electromagnetic conversion device; a switch control device is also provided, and the carrying capacity of the transport ship is greater than the dead weight of the photovoltaic platform;

[0014] The hydraulic jacking device is arranged on the deck of the transport ship. The hydraulic jacking device is a platform composed of large hydraulic jacks, which enables the photovoltaic platform to move vertically;

[0015] The electromagnetic conversion device is an electromagnetic crane device, which is inverted and fixed on the hydraulic jacking device, and the circuit is connected to the hull engine circuit;

[0016] The magnetic platform support base is a flat circular platform, the radius of which is smaller than the width of the ship;

[0017] A cylinder is arranged above the hydraulic jacking device, an electromagnetic conversion device is arranged inside the cylinder, and a magnetic suction platform support base is fixedly arranged on the top platform of the cylinder.

[0018] The radius of the cylinder is equal to the support base of the magnetic platform, and an electromagnetic conversion device is embedded in the cylinder;

[0019] The electromagnetic conversion device is a modified inverted electromagnetic crane that can absorb 150 tons of steel.

[0020] The base of the magnetic platform should be marked with truss positioning marks.

[0021] The photovoltaic platform supporting X-shaped lifting truss adopts an X-shaped structural design to ensure that the structural center of gravity of the ultra-large photovoltaic is located at the center point of the lifting truss.

[0022] The middle parts of the two support arms are rotatably connected to the middle part of the upper surface of the magnetic platform support base, so that the photovoltaic platform supporting X-shaped lifting truss can freely adjust the angle of the force arm, so that the photovoltaic platform supporting X-shaped lifting truss can be recovered into the hull.

[0023] A connecting seat is provided at the end of the stepped lever arm, and a sliding groove is provided on the outer side wall of the connecting seat;

[0024] The support rods are symmetrically arranged at both ends of the slide groove, the fixed ends of the electric push rods are arranged on the opposite side walls of the two support rods, the telescopic ends of the electric push rods are fixedly connected to the clamps, and arc grooves are opened on the opposite sides of the two clamps to match the legs of the photovoltaic platform.

[0025] The construction method based on the magnetic super-large photovoltaic platform jacking device includes the following steps:

[0026] S1. Select a small transport ship that can sail in the dense array offshore photovoltaic construction area, and the ship's load-bearing capacity is more than 1.5 times the weight of the photovoltaic platform carried;

[0027] S2. Fix the hydraulic jacking device on the deck of the transport ship;

[0028] S3, modifying the power generation system of the transport ship to connect it with the electromagnetic conversion device, and connecting the electromagnetic conversion device with the hydraulic jacking device;

[0029] S4, fixing the magnetic platform support base to the top platform of the cylinder above the hydraulic jacking device;

[0030] S5. The transport ship carries the photovoltaic platform support X-shaped lifting truss, sails to the dense array offshore photovoltaic construction area, and fixes the photovoltaic platform support X-shaped lifting truss on the magnetic platform support base according to the position of the photovoltaic platform support base, and adjusts the position;

[0031] S6. Fix the photovoltaic platform on the photovoltaic platform supporting X-shaped lifting truss through the half hoop opening and closing structure;

[0032] S7. Move the transport ship carrying the photovoltaic platform to the photovoltaic installation area through the GPS positioning system and the anchor mobile positioning system on the transport ship;

[0033] S8. Complete the photovoltaic platform docking construction task through the hydraulic jacking device, electromagnetic conversion device, and magnetic platform support base coupling device;

[0034] S9. After completing the construction task, disconnect the magnetic connection, retract the X-shaped lifting truss supporting the photovoltaic platform, and drive out of the dense array offshore photovoltaic construction area;

[0035] Repeat steps S6 to S9 until the installation and construction task of the ultra-large photovoltaic platform in the dense array offshore photovoltaic construction area is completed.

[0036] The technical solution provided by the embodiment of the present invention has the following beneficial effects: the present invention can solve the problems of difficulty in docking photovoltaic platforms in dense array offshore photovoltaic construction areas, unstable center of gravity, easy deformation of photovoltaic platforms, etc. in traditional jacking methods through a magnetic super-large photovoltaic platform jacking device and construction method, and realizes the economical, safe and stable docking construction task of super-large photovoltaic platforms by using a hydraulic jacking device, an electromagnetic conversion device, a magnetic platform support base coupling device and an X-shaped lifting truss, saving time and effort, and ensuring the rapid construction of super-large photovoltaic platforms in dense array offshore photovoltaic construction areas, thereby providing the necessary basic work for shortening the project construction period and ensuring the safety of the installed platform, greatly reducing the workload of later maintenance, greatly improving the construction efficiency, and greatly reducing the danger of ships traveling on dense offshore working surfaces;

[0037] It can effectively reduce the cost of offshore construction while ensuring that the photovoltaic platform structure does not deform and that the lifting equipment can be recovered, thereby reasonably ensuring the progress of the ship construction in the densely arranged offshore photovoltaic platform site;

[0038] In addition, the device involved in this patent has a simple structure, is easy to manufacture, and its components can be recycled multiple times to effectively improve economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 The overall structure of the embodiment of the present invention is shown in FIG. Figure 1 , that is, a schematic diagram of fixing the photovoltaic platform on the photovoltaic platform supporting X-shaped lifting truss through a semi-hoop opening and closing structure.

[0040] Figure 2 The overall structure of the embodiment of the present invention is shown in FIG. Figure 2 , that is, the angle between the two force arms of the X-shaped lifting truss supporting the photovoltaic platform is close to a rectangle.

[0041] Figure 3 for Figure 2 A partial enlarged view of .

[0042] Figure 4 Schematic diagram of the structure inside the cylinder according to an embodiment of the present invention.

[0043] Among them, the figure markings are: 1. transport ship; 2. hydraulic jacking device; 3. electromagnetic conversion device; 4. magnetic platform support base; 5. photovoltaic platform support X-shaped lifting truss; 6. anchor machine; 7. anchor chain; 8. photovoltaic platform support leg; 9. photovoltaic platform; 11. support arm; 21. stepped force arm; 31. support rod; 32. electric push rod; 33. clamp; 201. cylinder; 2101. connecting seat. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. Of course, the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0045] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0047] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0048] Example 1

[0049] See also Figures 1 to 4The present invention provides a magnetic super-large photovoltaic platform jacking device, comprising a transport ship 1, a hydraulic jacking device 2 arranged on the transport ship 1, an electromagnetic conversion device 3, a magnetic platform support base 4, and a photovoltaic platform support X-shaped lifting truss 5 for fixing a photovoltaic platform 9;

[0050] The transport ship 1 is also provided with an anchor windlass 6 and an anchor chain 7;

[0051] The magnetic platform support base 4 and the photovoltaic platform support X-shaped lifting truss 5 constitute a supporting mechanism of the photovoltaic platform 9.

[0052] The photovoltaic platform supporting X-shaped lifting truss 5 includes a rotating hinge structure, a stepped lever arm truss structure and a semi-hoop opening and closing structure;

[0053] The rotary hinge structure comprises two support arms 11 hinged to each other;

[0054] The stepped lever arm truss structure includes a stepped lever arm 21 in a stepped shape, which is arranged at the end of the support arm 11. The end of the stepped lever arm 21 is lower than the portion where the stepped lever arm 21 is connected to the support arm 11. The stepped lever arm is designed according to the hull width of the transport ship and the fulcrum distance of the photovoltaic platform. The stepped shape can ensure that the descending height of the stepped lever arm is lower than the height of the hull deck, which is convenient for the platform to dock with the pile foundation.

[0055] The semi-hoop opening and closing structure includes a support rod 31, an electric push rod 32, and a clamp 33 that matches the photovoltaic platform leg 8. The semi-hoop opening and closing structure is similar to a clamp structure. When closed, it can serve as the main support point of the photovoltaic platform. When the docking is completed, it is disconnected from the photovoltaic platform when it is in the open state.

[0056] The transport ship 1 is connected to the electromagnetic conversion device 3 to supply power to the electromagnetic conversion device 3; a switch control device is also provided, and the carrying capacity of the transport ship 1 is greater than the dead weight of the photovoltaic platform 9;

[0057] The hydraulic jacking device 2 is arranged on the deck of the transport ship 1. The hydraulic jacking device 2 is a platform composed of large hydraulic jacks, which enables the photovoltaic platform to move vertically;

[0058] The electromagnetic conversion device 3 is an electromagnetic crane device, which is inverted and fixed on the hydraulic jacking device 2, and the circuit is connected with the hull engine circuit;

[0059] The magnetic platform support base 4 is a flat circular platform, the radius of which is smaller than the width of the ship;

[0060] A cylinder 201 is arranged above the hydraulic jacking device 2 , the electromagnetic conversion device 3 is arranged inside the cylinder 201 , and the magnetic platform support base 4 is fixedly arranged on the top platform of the cylinder 201 .

[0061] The radius of the cylinder 201 is equal to the magnetic platform support base 4, and the electromagnetic conversion device 3 is embedded in the cylinder;

[0062] The electromagnetic conversion device 3 is a modified inverted electromagnetic crane, which can absorb 150 tons of steel.

[0063] The base of the magnetic platform should be marked with truss positioning marks.

[0064] The photovoltaic platform supporting X-shaped lifting truss 5 adopts an X-shaped structure design to ensure that the structural center of gravity of the ultra-large photovoltaic is located at the center point of the lifting truss.

[0065] The middle parts of the two support arms 11 are rotatably connected to the middle part of the upper surface of the magnetic platform support base 4, so that the photovoltaic platform supporting X-shaped lifting truss can freely adjust the angle of the force arm, so that the photovoltaic platform supporting X-shaped lifting truss can be recovered into the hull.

[0066] A connecting seat 2101 is provided at the end of the stepped lever arm 21, and a sliding groove is provided on the outer side wall of the connecting seat 2101;

[0067] The support rods 31 are symmetrically arranged at both ends of the slide groove, and the fixed ends of the electric push rods 32 are arranged on the opposite side walls of the two support rods 31. The telescopic ends of the electric push rods 32 are fixedly connected to the clamps 33. The opposite sides of the two clamps 33 are provided with arc grooves, which match the photovoltaic platform legs 8.

[0068] The construction method based on the magnetic super-large photovoltaic platform jacking device includes the following steps:

[0069] S1. Select a small transport ship 1 that can sail in the dense array offshore photovoltaic construction area, and the ship's load-bearing capacity is more than 1.5 times the weight of the photovoltaic platform carried;

[0070] S2, fixing the hydraulic jacking device 2 on the deck of the transport ship 1;

[0071] S3, modifying the power generation system of the transport ship 1 to connect it to the electromagnetic conversion device 3, and connecting the electromagnetic conversion device 3 to the hydraulic jacking device 2;

[0072] S4, fix the magnetic platform support base 4 to the top platform of the cylinder 201 above the hydraulic jacking device 2;

[0073] S5. The transport ship 1 carries the photovoltaic platform support X-shaped lifting truss 5, and after sailing to the dense array offshore photovoltaic construction area, fixes the photovoltaic platform support X-shaped lifting truss 5 on the magnetic platform support base 4 according to the position of the photovoltaic platform support base, and adjusts the position;

[0074] S6. Fix the photovoltaic platform 9 on the photovoltaic platform supporting X-shaped lifting truss 5 through the half hoop opening and closing structure;

[0075] S7, using the GPS positioning system and the anchor mobile positioning system on the transport ship 1, the transport ship 1 carrying the photovoltaic platform 9 is moved to the photovoltaic installation area;

[0076] S8, through the hydraulic jacking device 2, the electromagnetic conversion device 3, and the magnetic platform support base 4 coupling device, the photovoltaic platform 9 docking construction task is completed;

[0077] S9. After completing the construction task, disconnect the magnetic connection, retract the photovoltaic platform supporting X-shaped lifting truss 5, and drive out of the dense array offshore photovoltaic construction area;

[0078] Repeat steps S6 to S9 until the installation and construction task of the ultra-large photovoltaic platform in the dense array offshore photovoltaic construction area is completed.

[0079] The photovoltaic platform supporting X-shaped lifting truss 5 is fixed on the magnetic platform supporting base 4 and can be freely disassembled by controlling the magnetic force.

[0080] As a technical optimization solution of the present invention: the main body of the jacking mechanism composed of the magnetic platform support base 4 and the photovoltaic platform support X-shaped lifting truss 5 can realize the jacking construction of the photovoltaic platform and the deformation of the jacking mechanism, and realize the direct conversion of kinetic energy-electrical energy-magnetic energy through the transport ship 1 and the electromagnetic conversion device 3, thereby ensuring the maximum utilization of energy.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A magnetic super-large photovoltaic platform supporting device, characterized in that: It comprises a transport ship (1), a hydraulic jacking device (2) arranged on the transport ship (1), an electromagnetic conversion device (3), a magnetic platform support base (4), and a photovoltaic platform supporting X-shaped lifting truss (5) for fixing a photovoltaic platform (9); The transport ship (1) is also provided with an anchor windlass (6) and an anchor chain (7); The magnetic platform support base (4) and the photovoltaic platform support X-shaped lifting truss (5) form a supporting mechanism of the photovoltaic platform (9).

2. The magnetic super-large photovoltaic platform supporting device according to claim 1 is characterized in that: The photovoltaic platform supporting X-shaped lifting truss (5) comprises a rotating hinge structure, a stepped lever arm truss structure and a semi-hoop opening and closing structure; The rotary hinge structure comprises two support arms (11) hinged to each other; The stepped lever arm truss structure comprises a stepped lever arm (21) in a stepped shape, the stepped lever arm (21) being arranged at the end of the support arm (11), and the end of the stepped lever arm (21) being lower than the portion where the stepped lever arm (21) is connected to the support arm (11); The semi-hoop opening and closing structure comprises a support rod (31), an electric push rod (32), and a clamp (33) matching the photovoltaic platform support leg (8).

3. The magnetic super-large photovoltaic platform supporting device according to claim 2 is characterized in that: The transport ship (1) is connected to the electromagnetic conversion device (3) to supply power to the electromagnetic conversion device (3); a switch control device is also provided, and the carrying capacity of the transport ship (1) is greater than the dead weight of the photovoltaic platform (9); The hydraulic jacking device (2) is arranged on the deck of the transport ship (1), and the hydraulic jacking device (2) is a platform composed of large hydraulic jacks, which enables the photovoltaic platform to move vertically; The electromagnetic conversion device (3) is an electromagnetic crane device, which is inverted and fixed on the hydraulic jacking device (2), and the circuit is connected to the hull engine circuit; The magnetic platform support base (4) is a flat circular platform, the radius of which is smaller than the width of the ship; A cylinder (201) is arranged above the hydraulic lifting device (2), the electromagnetic conversion device (3) is arranged inside the cylinder (201), and the magnetic attraction platform support base (4) is fixedly arranged on the top platform of the cylinder (201).

4. The magnetic super-large photovoltaic platform supporting device according to claim 3 is characterized in that: The radius of the cylinder (201) is equal to that of the magnetic platform support base (4), and an electromagnetic conversion device (3) is embedded in the cylinder; The photovoltaic platform supporting X-shaped lifting truss (5) adopts an X-shaped structure design to ensure that the structural center of gravity of the super-large photovoltaic is located at the center point of the lifting truss.

5. The magnetic super-large photovoltaic platform supporting device according to claim 3 is characterized in that: The middle parts of the two support arms (11) are rotatably connected to the middle part of the upper surface of the magnetic platform support base (4).

6. The magnetic super-large photovoltaic platform supporting device according to claim 3 is characterized in that: A connecting seat (2101) is provided at the end of the stepped lever arm (21), and a sliding groove is provided on the outer side wall of the connecting seat (2101); The support rods (31) are symmetrically arranged at the two ends of the slide groove, the fixed ends of the electric push rods (32) are arranged on the opposite side walls of the two support rods (31), the telescopic ends of the electric push rods (32) are fixedly connected to the clamps (33), and arc grooves are provided on the opposite sides of the two clamps (33) to match the photovoltaic platform legs (8).

7. A construction method for a magnetic super-large photovoltaic platform supporting device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Select a small transport ship (1) that can sail in the dense array offshore photovoltaic construction area, and the ship's load-bearing capacity is more than 1.5 times the weight of the photovoltaic platform carried; S2. Fixing a hydraulic jacking device (2) on the deck of the transport ship (1); S3, modifying the power generation system of the transport ship (1) so as to connect it to the electromagnetic conversion device (3), and connecting the electromagnetic conversion device (3) to the hydraulic jacking device (2); S4, fixing the magnetic platform support base (4) on the top platform of the cylinder (201) above the hydraulic jacking device (2); S5. The transport ship (1) carries the photovoltaic platform supporting X-shaped lifting truss (5), and after sailing to the dense array offshore photovoltaic construction area, fixes the photovoltaic platform supporting X-shaped lifting truss (5) on the magnetic platform supporting base (4) according to the position of the photovoltaic platform supporting base, and adjusts the position; S6, fixing the photovoltaic platform (9) on the photovoltaic platform supporting X-shaped lifting truss (5) through the half hoop opening and closing structure; S7, using the GPS positioning system and the anchor mobile positioning system on the transport ship (1), the transport ship (1) carrying the photovoltaic platform (9) is moved to the photovoltaic installation area; S8, completing the photovoltaic platform (9) docking construction task through the hydraulic jacking device (2), the electromagnetic conversion device (3), and the magnetic platform support base (4) coupling device; S9, after completing the construction task, disconnect the magnetic connection, retract the photovoltaic platform supporting X-shaped lifting truss (5), and drive out of the dense array offshore photovoltaic construction area; Repeat steps S6 to S9 until the installation and construction task of the ultra-large photovoltaic platform in the dense array offshore photovoltaic construction area is completed.