Low-gravity-center high-stability offshore photovoltaic floating platform

Abstract

The invention discloses a low-gravity-center high-stability offshore photovoltaic floating platform which comprises a plurality of floating platform units, each floating platform unit comprises a deck frame, a platform deck is arranged above the deck frame, and a floating body of a crossed arc-shaped structure is arranged below the deck frame; a heavy block is arranged at the intersection point of the bottoms of the floating bodies; a cable hole for a cable to pass through is formed in the platform deck, and a cable bracket is arranged below the deck frame; a flexible hanging piece is arranged on the lower portion of the platform deck in the extending direction of the cable, and the cable is hung below the platform deck in an S shape under the supporting of the cable support and the flexible hanging piece. The crossed arc-shaped floating bodies are adopted, the water entering volume is large, and buoyancy is guaranteed; a large-mass heavy block is installed at the bottom of the arc-shaped floating body, the overall gravity center of the platform is lowered, and stability and overturning recovery capacity are improved. A cable support and a flexible hanging piece are installed on the lower portion of the floating body deck and used for cable S-shaped arrangement, and the cable is prevented from being snapped when the platform moves in waves.

Description

Technical Field

[0001] The present invention belongs to the technical field of photovoltaic power generation, and in particular relates to an offshore photovoltaic floating platform with a low center of gravity and high stability. Background Art

[0002] With the rapid development of the photovoltaic industry, the land area available for photovoltaic development is getting smaller and smaller. The deserts and wastelands available for development are mainly located in the northwest region, where the cost of power transmission is high. The ocean is close to the coastal power load center, with a vast area and great development potential.

[0003] The marine environment is complex. Under the influence of big waves and typhoons, floating photovoltaic platforms are prone to capsizing. At the same time, the power cable connections between platforms are easily broken by the direct movement of the platforms. The existing technology has conducted some research on offshore floating photovoltaic platforms. The Chinese invention patent with patent publication number CN 118560652A discloses a semi-submersible offshore photovoltaic floating support platform, which uses multiple floating columns to be evenly spaced along the circumferential direction on the lower surface of the deck; the Chinese invention patent with patent publication number CN 118850277 A discloses a ring cable tensioning platform architecture and photovoltaic device based on offshore floating photovoltaics, which uses a multi-layer annular floating structure, and the buoyancy components are evenly arranged under the annular structure, and inner and outer mooring cables are set; the Chinese utility model patent with patent authorization announcement number CN 221738041U discloses an offshore floating photovoltaic platform, which uses a single small size of multiple floating photovoltaic units with movable connections, and the units are hinged to each other head to tail. These solutions mainly increase the size of the floating body and the distance between the pontoons to improve the stability of the floating structure. Due to the influence of the deck load, the center of gravity is biased upward, which is not conducive to the anti-overturning ability of the floating platform; the connection method of the cables between the offshore photovoltaic floating platforms is not mentioned. Improving the platform's anti-wave and anti-overturning capabilities and ensuring the safe operation of the cables are key technical challenges for the smooth development of offshore floating photovoltaics. Based on this, it is necessary to propose a low-center-of-gravity and high-stability offshore photovoltaic floating platform. Summary of the invention

[0004] The present invention is proposed to solve the above-mentioned shortcomings, and its purpose is to provide an offshore photovoltaic floating platform with a low center of gravity and high stability. The device adopts a cross-arc floating body with a large water volume to ensure buoyancy; a large mass block is installed at the bottom of the arc-shaped floating body to lower the overall center of gravity of the platform, improve stability and overturning recovery ability; a cable bracket and a flexible suspension part are installed on the lower part of the floating body deck for S-shaped cable arrangement to avoid cable breakage when the platform moves in waves.

[0005] In order to achieve the above purpose, the present invention adopts the following scheme:

[0006] A low-center-of-gravity and high-stability offshore photovoltaic floating platform comprises a plurality of floating platform units, each of which comprises a deck frame, a platform deck being arranged above the deck frame, and a floating body in a cross-arc structure being arranged below the deck frame; a weight is arranged at the bottom intersection of the floating body; a cable hole for allowing cables to pass through is provided on the platform deck, and a cable bracket for supporting the cables is arranged at a position close to the cable hole below the deck frame; a plurality of flexible suspension members for suspending cables are arranged at the lower part of the platform deck along the extension direction of the cables, and the cables are suspended in an S-shape below the platform deck under the support of the cable bracket and the flexible suspension member; when moving in waves, the flexible suspension member releases a length margin by changing the size of the S-bend of the cable to offset the tension caused by the increase in the spacing between the floating platform units.

[0007] As a preferred embodiment, the deck frame is a frame structure formed by connecting and assembling a plurality of rods.

[0008] As a preferred embodiment, a plurality of reinforcing rods are provided in the middle of the deck frame, and the reinforcing rods are arranged in a cross shape.

[0009] As a preferred embodiment, the floating body includes a plurality of arc-shaped monomers arranged in a cross-like manner, the openings of the arc-shaped monomers are arranged toward the deck frame, both ends of the openings of the arc-shaped monomers are installed on rods located on the same side of the deck frame and are fixedly connected to the platform deck, and the bottoms of the plurality of arc-shaped monomers are crossed with each other.

[0010] As a preferred embodiment, the weight block is made of metal or concrete.

[0011] As a preferred embodiment, the cable bracket is installed through the reinforcement rod of the deck frame and is fixedly connected to the bottom of the platform deck.

[0012] As a preferred embodiment, the upper end of the flexible suspension member is hinged to the bottom of the platform deck, and the lower end of the flexible suspension member is hinged to the cable.

[0013] As a preferred embodiment, the flexible suspension member is a spring or an elastic cable.

[0014] As a preferred embodiment, the platform deck is made of steel structure or concrete.

[0015] As a preferred embodiment, a plurality of the floating platform units are arranged in rows and columns at sea, and the cable passes through the plurality of floating platform units supported by cable brackets and flexible suspension members until it reaches a junction box in the photovoltaic field.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] Firstly, the low-center-of-gravity and high-stability offshore photovoltaic floating platform of the present invention is different from the traditional column-type floating body. The present invention adopts an arc-shaped floating body structure, which is long in water and large in volume, and can provide sufficient buoyancy; the arc-shaped structure of the floating body can withstand a larger load than the horizontal structure; the two ends of the top of the floating body are fixed on the opposite sides of the deck edge, and the distance between the waterline planes is large, which can provide sufficient overturning restoring moment.

[0018] Secondly, a high-density weight block is installed at the center of the bottom of the floating body of the present invention to lower the overall center of gravity of the platform and improve the platform's anti-overturning ability. Under the action of wind and waves, the platform forms a "tumbler" effect.

[0019] Thirdly, a cable bracket and a flexible suspension member are installed at the lower part of the platform deck of the present invention, so that the cable is suspended in an "S" shape at the lower part of the deck. When the platform moves in the waves, the flexible suspension member allows the cable to release a length margin by changing the size of the S-bend to offset the tension caused by the increase in the platform spacing, thereby protecting the normal operation of the cable.

[0020] Fourthly, the upper end of the flexible suspension member of the present invention is hinged to the bottom of the platform deck, and the lower end is hinged to the cable. This connection method enables the flexible suspension member to swing freely, adapt to the movement of the platform, and reduce the stress on the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram of a low-center-of-gravity and high-stability offshore photovoltaic floating platform;

[0022] Figure 2 It is a structural diagram of the deck frame;

[0023] Figure 3 Schematic diagram of cable arrangement on a low-center-of-gravity and high-stability offshore photovoltaic floating platform;

[0024] Figure 4 It is a schematic diagram of the arrangement of offshore photovoltaic floating platforms with low center of gravity and high stability in rows;

[0025] In the figure, there are a deck frame 1, a rod 11, a reinforcing rod 12, a platform deck 2, a floating body 3, an arc-shaped monomer 31, a weight 4, a cable hole 5, a cable bracket 6, a flexible suspension member 7, and a cable 8. DETAILED DESCRIPTION

[0026] The specific implementation scheme of the low-center-of-gravity and high-stability offshore photovoltaic floating platform according to the present invention is described in detail below with reference to the accompanying drawings.

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the preferred implementation scheme of the present invention is described below in conjunction with specific embodiments. However, it should be understood that the drawings are only used for exemplary description and cannot be understood as a limitation on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. The positional relationship described in the drawings is only for exemplary description and cannot be understood as a limitation on this patent.

[0028] like Figure 1 As shown, a low-center-of-gravity and high-stability offshore photovoltaic floating platform of the present invention includes a plurality of floating platform units, each of which includes a deck frame 1, a platform deck 2 is arranged above the deck frame 1, the platform deck is used to install photovoltaic module support components, the platform deck 2 is made of steel structure or concrete, and the deck frame 1 is mainly used to improve the rigidity of the deck structure. A floating body 3 with a cross-arc structure is arranged below the deck frame 1; a weight block 4 is arranged at the bottom intersection of the floating body 3; the weight block 4 is made of metal or concrete material and is used to lower the overall center of gravity of the floating platform.

[0029] The platform deck 2 is provided with a cable hole 5 for the cable 8 to pass through. The cable hole 5 can be used for the cable 8 on the upper part of the platform deck to pass through the platform deck 2 to the lower part. A cable bracket 6 for supporting the cable 8 is provided at the lower part of the deck frame 1 near the cable hole 5; the cable bracket 6 is installed through the reinforcing rod 12 of the deck frame 1 and is fixedly connected to the bottom of the platform deck 2. The cable bracket 6 is used to support the cable 8 to pass through the lower part of the platform deck 2.

[0030] Several flexible suspension members 7 for suspending cables 8 are arranged at the lower part of the platform deck 2 along the extension direction of the cable 8. The cable 8 is suspended in an S shape under the platform deck 2 under the support of the cable bracket 6 and the flexible suspension member 7. When moving in the waves, the flexible suspension member 7 releases the length margin by changing the size of the S-shaped bend of the cable 8 to offset the tension caused by the increase in the spacing between the floating platform units. The upper end of the flexible suspension member 7 is hinged to the bottom of the platform deck 2, and the lower end of the flexible suspension member 7 is hinged to the cable 8. The flexible suspension member 7 adopts a spring or an elastic cable. The length of the flexible suspension member 7 is different, so that the cable 8 is arranged in an "S" shape, with a certain tensile redundant length. The flexible suspension member 7 uses a spring or a composite material with good elasticity; when the tension of the cable 8 increases, the flexible suspension member 7 rotates and stretches, releasing a certain tension. At this time, the line shape of the cable 8 changes to adapt to the change in tension.

[0031] like Figure 2As shown, the deck frame 1 is a frame structure formed by connecting and assembling a plurality of rods 11. A plurality of reinforcing rods 12 are arranged in the middle of the deck frame 1, and the reinforcing rods 12 are arranged crosswise.

[0032] like Figure 2 and Figure 3 As shown, the floating body 3 includes a plurality of cross-arranged arc-shaped monomers 31, the openings of the arc-shaped monomers 31 are arranged toward the deck frame 1, the two ends of the openings of the arc-shaped monomers 31 are mounted on the rods located on the same side of the deck frame 1 and are fixedly connected to the platform deck 2, and the bottoms of the plurality of arc-shaped monomers 31 cross each other. The shape of the arc-shaped monomers is arc-shaped, and most of them are immersed in water to provide buoyancy.

[0033] like Figure 4 As shown, several floating platform units are arranged in rows and columns at sea, and the cable 8 passes through the several floating platform units under the support of the cable support 6 and the flexible suspension member 7 to the photovoltaic field junction box.

[0034] The present invention proposes a low-center-of-gravity and high-stability offshore photovoltaic floating platform. Different from the traditional column-type floating body, the present invention adopts an arc-shaped floating body structure. The floating body 3 is long in length and large in volume in the water, which can provide sufficient buoyancy; the arc-shaped structure of the floating body 3 can withstand a larger load than the horizontal structure; the top two ends of the floating body 3 are fixed on the opposite sides of the deck edge, and the waterline plane spacing is large, which can provide sufficient overturning restoring torque; a high-density weight block 4 is installed at the center position of the bottom of the floating body to lower the overall center of gravity of the platform and enhance the platform's anti-overturning ability. Under the action of wind and waves, the platform forms a "tumbler" effect; a cable bracket 6 and a flexible suspension member 7 are installed at the lower part of the platform deck 2, so that the cable 8 is suspended in an "S" shape at the lower part of the deck. When the platform moves in the waves, the flexible suspension member 7 allows the cable 8 to release the length margin by changing the size of the S-bend to offset the tension caused by the increase in the platform spacing, thereby protecting the normal operation of the cable.

[0035] The above embodiments are merely examples of the technical solutions of the present invention. The low-center-of-gravity, high-stability offshore photovoltaic floating platform involved in the present invention is not limited to the contents described in the above embodiments, but is subject to the scope defined by the claims. Any modification, supplement or equivalent replacement made by technicians in the field of the present invention based on this embodiment is within the scope of protection required by the claims of the present invention.

Claims

1. A low center of gravity and high stability offshore photovoltaic floating platform, characterized by: The invention comprises a plurality of floating platform units, each of which comprises a deck frame (1), a platform deck (2) is arranged above the deck frame (1), a floating body (3) in a cross-arc structure is arranged below the deck frame (1); a weight block (4) is arranged at the bottom intersection of the floating body (3); The platform deck (2) is provided with a cable hole (5) for allowing the cable (8) to pass through, and a cable bracket (6) for supporting the cable (8) is provided below the deck frame (1) at a position close to the cable hole (5); A plurality of flexible suspension members (7) for suspending cables (8) are arranged at the lower part of the platform deck (2) along the extension direction of the cables (8); the cables (8) are suspended in an S-shape below the platform deck (2) under the support of the cable bracket (6) and the flexible suspension members (7); when moving in the waves, the flexible suspension members (7) release the length margin by changing the size of the S-shaped bend of the cables (8) to offset the tension caused by the increase in the spacing between the floating platform units.

2. The low-center-of-gravity and high-stability offshore photovoltaic floating platform according to claim 1 is characterized by: The deck frame (1) is a frame structure formed by connecting and assembling a plurality of rods (11).

3. The low-center-of-gravity and high-stability offshore photovoltaic floating platform according to claim 2 is characterized by: A plurality of reinforcing rods (12) are arranged in the middle of the deck frame (1), and the reinforcing rods (12) are arranged in a cross shape.

4. The low-center-of-gravity and high-stability offshore photovoltaic floating platform according to claim 3 is characterized by: The floating body (3) comprises a plurality of cross-arranged arc-shaped monomers (31), the openings of the arc-shaped monomers (31) are arranged toward the deck frame (1), both ends of the openings of the arc-shaped monomers (31) are mounted on rods located on the same side of the deck frame (1) and are fixedly connected to the platform deck (2), and the bottoms of the plurality of arc-shaped monomers (31) cross each other.

5. The low-center-of-gravity and high-stability offshore photovoltaic floating platform according to any one of claims 1 to 4, characterized in that: The weight block (4) is made of metal or concrete.

6. The low-center-of-gravity and high-stability offshore photovoltaic floating platform according to claim 3 or 4, characterized in that: The cable bracket (6) is installed through the reinforcing rod (12) of the deck frame (1) and is fixedly connected to the bottom of the platform deck (2).

7. The low-center-of-gravity and high-stability offshore photovoltaic floating platform according to any one of claims 1 to 4, characterized in that: The upper end of the flexible suspension member (7) is hinged to the bottom of the platform deck (2), and the lower end of the flexible suspension member (7) is hinged to the cable (8).

8. The low-center-of-gravity and high-stability offshore photovoltaic floating platform according to any one of claims 1 to 4, characterized in that: The flexible suspension member (7) is a spring or an elastic cable.

9. The low-center-of-gravity and high-stability offshore photovoltaic floating platform according to any one of claims 1 to 4, characterized in that: The platform deck (2) is made of steel structure or concrete.

10. The low-center-of-gravity and high-stability offshore photovoltaic floating platform according to any one of claims 1 to 4, characterized in that: A plurality of the floating platform units are arranged in rows and columns at sea, and the cable (8) passes through the plurality of floating platform units under the support of a cable support (6) and a flexible suspension member (7) until it reaches a junction box in a photovoltaic field area.

Images