Self-anchored flexible support type offshore floating photovoltaic floating body platform and implementation method

Abstract

The invention provides a self-anchored flexible support type offshore floating photovoltaic floating body platform which comprises an upper frame and a lower frame, inclined stand columns are connected and arranged between the upper frame and the lower frame to form a floating body frame structure, and a floating body is arranged on the floating body frame structure; the upper frame comprises boundary beams arranged on the outer portion and an inner frame beam arranged on the inner portion and shaped like a Chinese character'jing ', and steel strands are arranged on the upper frame. A fixing groove frame and a reinforcing groove frame are arranged at the two ends of the steel strand. The whole floating body platform structure is of a space frame structure, the periphery of the inclined stand column is wrapped with the floating body structure, so that the steel consumption is reduced under the same condition, water plane connection is increased, the stability of the floating body platform structure is better, and the floating body platform structure has better wind and wave resistance; the floating body platform is composed of the rigid frame and the flexible steel strands, the steel structure engineering amount of the floating body platform can be effectively reduced, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore floating photovoltaic power generation, and in particular to a self-anchored flexible bracket type offshore floating photovoltaic floating platform and an implementation method thereof. Background Art

[0002] my country has a large sea area, of which about 710,000 square kilometers are suitable for the deployment of offshore floating photovoltaics, and there is huge potential for offshore photovoltaic development. Floating photovoltaics can also develop together with offshore wind power to achieve multi-energy integration and complementarity, which will help to achieve a smooth transformation of my country's energy structure with higher quality. At present, both domestic and foreign offshore floating developments are in the early test and demonstration stage, and there are no fully commercialized offshore floating photovoltaic projects in the world. Compared with inland waters, the marine environment is more complex and harsh. Under the influence of factors such as wind, waves, currents, and seawater corrosion, the development and construction of offshore floating photovoltaics is more difficult. The traditional simple floating body scheme on the lake surface is difficult to meet the requirements. The floating body foundation should refer to the marine engineering structure scheme, and the floating body foundation structure has higher requirements. The difficulty of offshore construction is also greater than that on land. In addition, the low-income characteristics of photovoltaic power stations determine that the construction of photovoltaic power stations should focus on reducing investment costs. Therefore, on the basis of ensuring the performance and safety of photovoltaic modules and the safety of the floating body structure that meets the requirements of resisting sea wind, currents and wave loads, it is very necessary to reduce the cost of the floating body foundation. Summary of the invention

[0003] The first object of the present invention is to provide an offshore floating photovoltaic floating platform that effectively controls economic efficiency while ensuring the safety of the floating platform. To this end, the present invention adopts the following technical solutions:

[0004] A self-anchored flexible bracket type offshore floating photovoltaic floating platform, comprising an upper frame and a lower frame, wherein the upper frame and the lower frame are connected and arranged with oblique columns to form a floating frame structure, and a floating body is arranged on the floating frame structure; the floating body is a structure with a certain thickness of an HDPE shell plus an internal lightweight filler, and the transverse cross-section is a semicircular ring or a saddle shape, and mounting screw holes are arranged on the floating body, which are symmetrically arranged on the oblique columns, the lower frame beams or the outer sides of the support beams during installation, and are fastened and connected by bolts; the upper frame comprises respectively A side beam is arranged outside, and an internal frame beam is arranged inside, the side beam and the internal frame beam are connected to each other, the side beam and the internal frame beam are respectively provided with a first through hole and a second through hole, the upper frame is provided with a steel strand passing through the first through hole and the second through hole, a photovoltaic panel assembly is installed on the upper part of the steel strand to form a flexible supporting state for the photovoltaic panel assembly through the steel strand, an adjustable tensioning structure is arranged at the connecting end of the steel strand on the side beam, and the adjustable tensioning structure is respectively provided with a fixed end and a tensioning end on the side beams on both sides.

[0005] Furthermore: the main floating body is wrapped around the outside of the inclined columns.

[0006] Furthermore, the lower frame includes lower frame beams that are connected to each other to form a main frame, and a lower floating body is wrapped on the outside of the lower frame beams.

[0007] Furthermore: a support beam is connected between adjacent lower frame beams, and a secondary floating body is wrapped around the outside of the support beam.

[0008] Furthermore: side columns are arranged between the upper frame and the lower frame, and the side columns are staggered with the oblique columns.

[0009] Furthermore: the internal frame beam includes a main beam and a secondary beam connected to each other, the main beam is connected to the side beams on both sides, a limiting connector is arranged on the upper part of the secondary beam, and the second through hole is opened in the limiting connector.

[0010] Furthermore, the bottom of the photovoltaic panel of the photovoltaic panel assembly is connected to a plurality of adjacently arranged steel strands, and a shock-absorbing beam is connected and arranged between the steel strands that carry the same photovoltaic panel.

[0011] Furthermore: the fixed end includes a fixed groove frame with a scale, the fixed groove frame is connected and arranged at the first through hole position of one of the side beams, and a first connecting hole matching with the steel strand is opened on the fixed groove frame, and the end of the steel strand is provided with a spring and an extrusion anchor that cooperate with each other, and the spring and the extrusion anchor are arranged in a groove portion with a scale inside the fixed groove frame to feedback the tensioning degree of the steel strand.

[0012] Furthermore: the tensioning end includes a reinforcement trough frame and an anchor ring clip structure, the reinforcement trough frame is connected and arranged at the first through hole position of the other side beam, and a second connecting hole matching the steel strand is opened on the reinforcement trough frame, the anchor ring clip structure is arranged on the steel strand and is squeezed and fixed with the reinforcement trough frame.

[0013] The second object of the present invention is to provide a construction method that effectively improves construction efficiency. To this end, the present invention adopts the following technical solutions:

[0014] A method for implementing a self-anchored flexible bracket type offshore floating photovoltaic floating platform, the specific steps are as follows:

[0015] S1: pre-assembling the floating body frame structure in the processing yard: assembling and connecting the upper frame and the lower frame through the inclined columns and the side columns, and installing the floating body at its specific position;

[0016] S2: Making a fixed trough frame for fixing the steel strand: selecting a suitable spring, testing and calibrating the pretension of the steel strand and the spring deformation, setting scale lines at the spring installation position and different pretension positions corresponding to different spring deformations in the fixed trough frame, and installing the fixed trough frame and the steel strand on the side beam;

[0017] S3: Install the reinforcement trough frame: install the reinforcement trough frame on the side beam on the other side, and install the steel strand to the side beam after the steel strand reaches the set pre-tension through the anchor ring clip structure, so that the steel strand is connected to the upper frame;

[0018] S4: Installing photovoltaic panels: Installing photovoltaic panels on the upper part of the steel strands;

[0019] S5: Overall assembly at sea: The assembled floating platform units are transported to the target sea area, and multiple floating platform units are connected with the mooring system to form an overall floating system at sea.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The overall structure of the floating platform of the present invention is a space frame structure. The floating structure is wrapped around the inclined columns and connected to the upper frame and the lower frame, so that the amount of steel used is reduced under the same conditions, and it is helpful to increase the surface connection of the waterline, so that the floating platform structure has better stability and better wind and wave resistance. At the same time, the upper frame is arranged with steel strands and the photovoltaic panel assembly is fixed on it, which reduces the amount of steel used in the upper frame, lowers the center of gravity of the structure, and has better stability performance; an offshore floating photovoltaic floating platform composed of a floating rigid frame and flexible steel strands is formed, and thereby the cost of the floating platform is effectively reduced while ensuring the safety of the floating platform; the fixed trough frame and spring with scales on the steel strands can feedback the tensioning degree of the steel strands in place, which is convenient for the maintenance of the steel strands in place, improves the efficiency of offshore operation and maintenance, and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the lower frame of the present invention;

[0024] Figure 3 It is a schematic diagram of the arrangement of the upper frame of the present invention;

[0025] Figure 4 It is a schematic diagram of the main structure of the upper frame of the present invention;

[0026] Figure 5 It is a schematic diagram of the arrangement of the steel strands and the photovoltaic panels of the present invention;

[0027] Figure 6This is a schematic diagram of the structure of the fixed end connection of the steel strand of the present invention;

[0028] Figure 7 It is a schematic structural diagram of the connection of the tensioning end of the steel strand of the present invention.

[0029] The markings in the attached drawings are: inclined column 1, lower frame beam 2, side column 3, support beam 4, main floating body 5, lower floating body 6, auxiliary floating body 7, side beam 8, secondary beam 9, main beam 10, limit connector 11, shock-absorbing beam 12, steel strand 13, photovoltaic panel 14, fixed trough frame 15, spring 16, extrusion anchor 17, reinforcement trough frame 18, anchor ring clamp structure 19. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0031] like Figure 1-7 As shown, a self-anchored flexible support type offshore floating photovoltaic floating platform includes an upper frame and a lower frame, an inclined column 1 is connected between the upper frame and the lower frame to form a floating frame structure, and a floating body is arranged on the floating frame structure, and the inclined column 1 is inclined upward and toward the outside of the floating frame structure (such as Figure 1-2 As shown); the upper frame includes side beams 8 respectively arranged on the outside and internal frame beams arranged on the inside, the side beams 8 and the internal frame beams are connected to each other, the side beams 8 and the internal frame beams are respectively provided with a first through hole and a second through hole, the upper frame is provided with a steel strand 13 passing through the first through hole and the second through hole, a photovoltaic panel assembly is installed on the upper part of the steel strand 13 to form a flexible support state for the photovoltaic panel assembly through the steel strand 13, an adjustable tensioning structure is provided at the connecting end of the steel strand 13 on the side beam 8, and the adjustable tensioning structure is respectively provided with a fixed end and a tensioning end on the side beams 8 on both sides.

[0032] In this embodiment, the lower frame includes lower frame beams 2 connected to each other to form a main frame, and a lower floating body 6 is wrapped on the outer surface of the lower frame beams 2. The lower floating body 6 is preferably a square floating body structure, and the square floating body structure is wrapped in sections around the lower frame beams 2, which helps to improve the water damping of the floating body and enhance the stability and hydrodynamic performance of the floating body structure.

[0033] The floating body is a structure with a certain thickness of HDPE shell and internal light filling, and the transverse cross section is semicircular or saddle-shaped. The floating body is provided with mounting screw holes, which are symmetrically arranged on the outer side of the inclined column 1, the lower frame beam 2 or the support beam 4 during installation, and are fastened and connected by bolts;

[0034] like Figure 1-2As shown, specifically, the main floating body 5 is wrapped around the outside of the inclined column 1. At the same time, the support beams 4 are connected between the adjacent lower frame beams 2, and the auxiliary floating body 7 is wrapped around the outside of the support beams 4.

[0035] In this embodiment, both the main float 5 and the auxiliary float 7 are cylindrical floats. The main float 5 provides the main buoyancy for the float frame structure, and on this basis, the setting of the auxiliary float 7 can further increase the reserve buoyancy of the float frame structure, thereby ensuring the overall floating effect of the float frame structure.

[0036] Specifically, a side column 3 is arranged between the upper frame and the lower frame, and the side column 3 is arranged in a staggered manner with the oblique column 1. The side column 3 helps to improve the overall rigidity so as to stably and safely support the upper photovoltaic assembly.

[0037] like Figure 1-4 As shown, specifically, the internal frame beam includes a main beam 10 and a secondary beam 9 which are interconnected, the main beam 10 is connected to the side beams 8 on both sides, a limiting connector 11 is arranged on the upper part of the secondary beam 9, and a second through hole is opened in the limiting connector 11, so that the steel strand 13 can pass through the limiting connector 11 on the secondary beam 9, thereby restraining the lateral swing of the steel strand 13, improving stability, and reducing vibration of the steel strand 13.

[0038] In this embodiment, the "well" shaped beam frame composed of the main beam 10 and the secondary beam 9 is used to make the upper frame have sufficient rigidity. The steel strands 13 are arranged at certain intervals along the main beam 10 of the "well" shaped beam frame. The two ends of the steel strands 13 are respectively passed through the side beams 8 for fixation, and a certain pre-tension is applied. The side beams 8 themselves and the main beams 10 jointly resist the tension of the steel strands 13. Therefore, the photovoltaic panel assembly is fixed on the upper part of the steel strands 13, and the overall steel consumption of the upper frame can be reduced accordingly.

[0039] like Figure 5 As shown, the bottom of the photovoltaic panel 14 of the photovoltaic panel assembly is connected to two adjacently arranged steel strands 13, and a shock-absorbing beam 12 is connected and arranged between two adjacent steel strands 13 carrying the same photovoltaic panel 14, so as to improve stability and change the inherent characteristics of the steel strands 13, thereby effectively reducing the vibration of the steel strands 13.

[0040] like Figure 6 As shown, specifically, the fixed end includes a fixed slot frame 15 with a scale, and the fixed slot frame 15 is connected and arranged at the first through hole position of one side of the side beam 8. The fixed slot frame 15 is wrapped around the outside of the side beam 8, and a first connecting hole matching with the steel strand 13 is opened on the fixed slot frame 15, so that the steel strand 13 passes through one side of the side beam 8 and the fixed slot frame 15 with a scale for connection and installation. The end of the steel strand 13 is provided with a spring 16 and an extrusion anchor 17 that cooperate with each other. The spring 16 and the extrusion anchor 17 are arranged in a groove with a scale inside the fixed slot frame 15 to feedback the tensioning degree of the steel strand 13.

[0041] In this embodiment, the scale lines are set at the installation position of the spring 16 in the fixed slot frame 15 and at different pre-tension positions corresponding to different deformations of the spring 16. The spring 16 is calibrated with pre-tension, and the scale on the fixed slot frame 15 can reflect the tensioning degree of the steel strand 13. During installation, when the other end (tensioning end) is tensioned, the spring 16 is pressed to a predetermined scale by the compression anchor 17, and the set pre-tensioning force is achieved. During the adjustment process, the relaxation degree of the spring 16 and the scale of the fixed slot frame 15 can reflect the tensioning degree of the steel strand 13. When the steel strand 13 is relaxed, it is timely pressed and tensioned, which is convenient for the maintenance of the steel strand 13 in place.

[0042] like Figure 7 As shown, specifically, the tensioning end includes a reinforcement trough frame 18 and an anchor ring clamp structure 19. The reinforcement trough frame 18 is connected and arranged at the first through hole position of the side beam 8 on the other side. At the same time, the reinforcement trough frame 18 is wrapped around the outside of the side beam 8, and a second connecting hole matching the steel strand 13 is opened on the reinforcement trough frame 18. The anchor ring clamp structure 19 is arranged on the steel strand 13 and is squeezed and fixed with the reinforcement trough frame 18, so that the steel strand 13 can be tensioned to the set pre-tensioning force by using a jack.

[0043] See also Figure 1-7 When using and constructing the self-anchored flexible support offshore floating photovoltaic floating platform, the specific steps are as follows:

[0044] S1: Determine the number of photovoltaic floating platform units to be used based on the planned photovoltaic capacity and the size of the photovoltaic panels 14 so as to prefabricate the required single floating platform in the processing yard;

[0045] S2: The floating frame structure is pre-assembled in the processing yard, the upper frame and the lower frame are assembled and welded together through the inclined columns 1 and the side columns 3, and the floating body is installed at its specific position, and the floating body provides buoyancy for the floating frame structure at sea;

[0046] S3: Make a fixed slot frame 15 for fixing the steel strand 13: select a suitable spring 16, test and calibrate the pretension of the steel strand 13 and the deformation of the spring 16, set scale lines at the installation position of the spring 16 in the fixed slot frame 15 and at different pretension positions corresponding to different deformations of the spring 16, and install the fixed slot frame 15 and the steel strand 13 on the side beam 8;

[0047] S4: Install the reinforcing channel frame 18: Install the reinforcing channel frame 18 on the other side beam 8, and install the steel strand 13 on the other side beam 8 after reaching the set pre-tension through the anchor ring clip structure 19, so that the steel strand 13 is connected to the upper frame after reaching the set pre-tension;

[0048] S5: Installing the photovoltaic panel 14: pre-arranging the shock absorbing beam 12 on the adjacent steel strands 13 carrying the same photovoltaic panel 14, so as to install the photovoltaic panel 14 on the upper part of the steel strands 13, thereby completing the assembly of the unit floating platform;

[0049] S6: Overall assembly at sea: The assembled floating platform units are transported to the target sea area and launched into the water. Multiple floating platform units are connected with mooring systems and connecting lines to form a large array of the overall offshore floating system.

[0050] The above embodiment is only a preferred technical solution of the present invention. Those skilled in the art should understand that the technical solutions or parameters in the embodiments can be modified or replaced without departing from the principle and essence of the present invention, and all should be covered within the protection scope of the present invention.

Claims

1. A self-anchored flexible support type offshore floating photovoltaic floating platform, characterized in that: The invention comprises an upper frame and a lower frame, wherein an inclined column (1) is connected between the upper frame and the lower frame to form a floating frame structure, and a floating body is arranged on the floating frame structure; the upper frame comprises side beams (8) respectively arranged outside and internal frame beams arranged inside, the side beams (8) and the internal frame beams are connected to each other, the side beams (8) and the internal frame beams are respectively provided with a first through hole and a second through hole, the upper frame is provided with a steel strand (13) passing through the first through hole and the second through hole, a photovoltaic panel assembly is installed on the upper part of the steel strand (13) to form a flexible support state for the photovoltaic panel assembly through the steel strand (13), an adjustable tensioning structure is arranged at the connection end of the steel strand (13) on the side beam (8), and the adjustable tensioning structure is respectively provided with a fixed end and a tensioning end on the side beams (8) on both sides.

2. The self-anchored flexible support offshore floating photovoltaic floating platform according to claim 1 is characterized by: The main floating body (5) is arranged outside the inclined columns (1) and wrapped thereon.

3. The self-anchored flexible support offshore floating photovoltaic floating platform according to claim 1 is characterized by: The lower frame comprises lower frame beams (2) which are connected to each other to form a main frame, and a lower floating body (6) is wrapped around the outer surface of the lower frame beams (2).

4. The self-anchored flexible support type offshore floating photovoltaic floating platform according to claim 3 is characterized by: A support beam (4) is connected between adjacent lower frame beams (2), and a secondary floating body (7) is wrapped around the outside of the support beam (4).

5. The self-anchored flexible support offshore floating photovoltaic floating platform according to claim 1 is characterized by: A side column (3) is arranged between the upper frame and the lower frame, and the side column (3) is arranged in a staggered manner with the oblique column (1).

6. The self-anchored flexible support offshore floating photovoltaic floating platform according to claim 1 is characterized by: The internal frame beam comprises a main beam (10) and a secondary beam (9) connected to each other in a "well" shape, the main beam (10) being connected to side beams (8) on both sides, a limiting connecting piece (11) being arranged on the upper part of the secondary beam (9), and the second through hole being opened in the limiting connecting piece (11).

7. The self-anchored flexible support offshore floating photovoltaic floating platform according to claim 1 is characterized by: The bottom of the photovoltaic panel (14) of the photovoltaic panel assembly is connected to a plurality of adjacently arranged steel strands (13), and a shock absorbing beam (12) is connected and arranged between the steel strands (13) that carry the same photovoltaic panel (14).

8. The self-anchored flexible support offshore floating photovoltaic floating platform according to claim 1 is characterized by: The fixed end comprises a fixed slot frame (15) with a scale, the fixed slot frame (15) is connected and arranged at the position of a first through hole of one of the side beams (8), and a first connection hole matching with the steel strand (13) is opened on the fixed slot frame (15), and a spring (16) and a squeeze anchor (17) matching each other are arranged at the end of the steel strand (13), and the spring (16) and the squeeze anchor (17) are arranged in a slot portion with a scale inside the fixed slot frame (15) so as to feedback the tension degree of the steel strand (13).

9. The self-anchored flexible support offshore floating photovoltaic floating platform according to claim 1 or 8, characterized in that: The tensioning end comprises a reinforcing channel frame (18) and an anchor ring clip structure (19); the reinforcing channel frame (18) is connected to a first through hole position of the other side beam (8), and a second connection hole matching the steel strand (13) is opened on the reinforcing channel frame (18); the anchor ring clip structure (19) is arranged on the steel strand (13) and is fixed to the reinforcing channel frame (18) by being squeezed.

10. A construction method for a self-anchored flexible support type offshore floating photovoltaic floating platform, characterized in that: The construction is carried out using the self-anchored flexible bracket type offshore floating photovoltaic floating platform as described in any one of claims 1 to 9, and the specific steps are as follows: S1: pre-assembling the floating body frame structure in a processing plant: assembling and connecting the upper frame and the lower frame through the inclined columns (1) and the side columns (3), and installing the floating body at its specific position; S2: making a fixed slot frame (15) for fixing the steel strand (13): selecting a suitable spring (16), testing and calibrating the pretension of the steel strand (13) and the deformation of the spring (16), setting scale lines at the installation position of the spring (16) and different pretension positions corresponding to different deformations of the spring (16) in the fixed slot frame (15), and installing the fixed slot frame (15) and the steel strand (13) on the side beam (8); S3: Installing the reinforcing channel frame (18): installing the reinforcing channel frame (18) on the side beam (8) on the other side, and installing the steel strand (13) on the side beam (8) after reaching a set pre-tension through an anchor ring clip structure (19), thereby connecting the steel strand (13) to the upper frame; S4: Installing a photovoltaic panel (14): installing a photovoltaic panel (14) on the upper part of the steel strand (13); S5: Overall assembly at sea: The assembled floating platform units are transported to the target sea area, and multiple floating platform units are connected with the mooring system to form an overall floating system at sea.

Images