Photovoltaic support bearing device based on offshore floating platform

Abstract

The present invention discloses a photovoltaic support bearing device based on an offshore floating platform, which belongs to the technical field of water equipment. The bearing device includes a platform part and a steel structure part installed on the platform part; the steel structure part includes a plurality of steel columns arranged in a matrix form, and also includes a plurality of main steel beams arranged along the front-back direction and a plurality of secondary steel beams arranged along the left-right direction, the main steel beams are installed on the top of the steel columns, and the secondary steel beams are connected between adjacent main steel beams; the main steel beams and the correspondingly connected steel columns and the main steel beams and the correspondingly connected secondary steel beams are all floatingly connected; the lower end of the steel column is connected to the platform part through an elastic connection node. The present invention dissipates wave loads through elastic connection nodes and floating connections, reduces the impact on the steel structure part, effectively improves the durability of the device, and also has the advantages of simple structure and low cost.

Description

Technical Field

[0001] The invention belongs to the technical field of water equipment, and in particular relates to an offshore bearing device. Background Art

[0002] With the rapid development of the offshore photovoltaic industry, offshore power generation systems have been able to rely on electrical components such as grid-connected inverters to achieve power transmission from the power generation end to the user end.

[0003] Traditional offshore photovoltaic power generation bearing devices are mainly jellyfish floating type, which directly installs photovoltaic brackets and photovoltaic panels on floating platforms. Since photovoltaic panels are close to the sea surface, they are easily corroded.

[0004] In order to solve the above problems and avoid damage to components, the existing technology has proposed a solution of building a steel structure on an offshore floating platform. The lower space of the steel structure can be used to install the discharger component box, and the upper space is used to install photovoltaic panels, so as to meet the integration requirements of grid-connected power generation and transmission in the same space. However, the steel structure must not only bear the constant load from the photovoltaic component panels on the upper layer and its own weight, the snow load in winter, and variable loads such as wind loads blowing from the sea surface, but also the wave loads from the floating platform below. Wave loads are affected by wind and tides and are unpredictable. Long-term wave loads of different frequencies will cause fatigue of the steel structure and insufficient durability. Summary of the invention

[0005] The present invention proposes a photovoltaic support bearing device based on an offshore floating platform, the purpose of which is to solve the problem that the bearing device is easily fatigued and has insufficient durability due to the influence of wave loads.

[0006] The technical solution of the present invention is as follows:

[0007] A photovoltaic support bearing device based on an offshore floating platform, comprising a platform portion and a steel structure portion installed on the platform portion;

[0008] The steel structure part includes a plurality of steel columns arranged in a matrix form, a plurality of main steel beams arranged in the front-to-back direction, and a plurality of secondary steel beams arranged in the left-to-right direction. The main steel beams are installed on the tops of the steel columns, and the secondary steel beams are connected between adjacent main steel beams. The main steel beams and the correspondingly connected steel columns, as well as the main steel beams and the correspondingly connected secondary steel beams are all floatingly connected.

[0009] The lower end of the steel column is connected to the platform part through an elastic connection node.

[0010] As a further improvement of the photovoltaic support bearing device based on the offshore floating platform: the floating connection between the main steel beam and the corresponding connected steel column means that a second connecting plate is provided at the bottom of the main steel beam, and a third connecting plate is connected to the upper end of the corresponding steel column, and a sliding plate is provided between the second connecting plate and the third connecting plate, and the second connecting plate, the sliding plate and the third connecting plate are provided with first strip holes with corresponding positions for realizing fastener connection between the three, and the first strip holes are arranged along the left and right directions.

[0011] As a further improvement of the photovoltaic support bearing device based on the offshore floating platform: the floating connection between the main steel beam and the corresponding connected secondary steel beam means that a pair of connecting angles are fixedly installed on the side of the main steel beam, and the end of the corresponding secondary steel beam is located between the pair of connecting angles. The connecting angles and the secondary steel beam are provided with second strip holes with corresponding positions for realizing fastener connection between the three, and the second strip holes are arranged along the left and right directions.

[0012] As a further improvement of the photovoltaic support bearing device based on the offshore floating platform: the platform part includes a plurality of floating tubes arranged in the front-to-back direction and arranged left-to-right, and adjacent floating tubes are connected by a connecting module;

[0013] The elastic connection nodes at the lower ends of the steel columns connected to the same main steel beam are connected to the same floating tube.

[0014] As a further improvement of the photovoltaic support bearing device based on the offshore floating platform: the elastic connection node includes an upper connection part, a lower connection part and a spring connected between the upper connection part and the lower connection part;

[0015] The lower end of the steel column is connected to a bottom plate, and the upper connecting portion is connected to the bottom plate via a fastener;

[0016] The lower connecting part is connected to the floating tube through a connecting mechanism.

[0017] As a further improvement of the photovoltaic bracket bearing device based on the offshore floating platform: a horizontal limiting mechanism is also provided between the upper connecting part and the lower connecting part, and the horizontal limiting mechanism includes a limiting sleeve fixed on the upper connecting part and a first limiting rod installed on the lower connecting part, and the first limiting rod passes through the limiting sleeve.

[0018] As a further improvement of the photovoltaic bracket bearing device based on the offshore floating platform: a vertical limiting mechanism is also provided between the upper connecting part and the lower connecting part, and the vertical limiting mechanism includes a second limiting rod fixed on the upper connecting part and a limiting frame installed on the lower connecting part, and the second limiting rod passes downward through the horizontal plate on the limiting frame and is connected to the limiting nut.

[0019] As a further improvement of the photovoltaic support bearing device based on the offshore floating platform: the springs in each group of elastic connection nodes are multiple groups, which are arranged in a matrix form with the corresponding steel column as the center.

[0020] As a further improvement of the photovoltaic support bearing device based on the offshore floating platform: the steel structure part also includes a first flexible support member connected between the main steel beam connected to the steel column and the top thereof, and / or connected between the secondary steel beam connected to the steel column and the top thereof through the main steel beam.

[0021] As a further improvement of the photovoltaic support bearing device based on the offshore floating platform: the steel structure part also includes a second flexible support member connected between adjacent main steel beams, and there are two groups of cross-arranged second flexible support members between each group of adjacent main steel beams.

[0022] Compared with the prior art, the present invention has the following positive effects:

[0023] 1. The present invention realizes the connection between the steel column and the platform part through an elastic connection node. When the wave load on the platform part is transmitted to the steel structure part, the elastic connection node can effectively dissipate the wave energy through deformation, thereby reducing the impact on the steel structure part.

[0024] 2. The present invention adopts a floating connection method between the main steel beam and the steel column and between the main steel beam and the secondary steel beam. When the load is transmitted inside the steel structure part, the floating connection can further dissipate the wave energy.

[0025] 3. The present invention designs the platform part into a structure in which multiple floating tubes are arranged side by side. Since the large-diameter floating tubes have good rigidity in the front-to-back direction, the deformation trend of the platform itself is mainly a "snake" deformation along the left-right direction, that is, this structural form can resolve the wave load received into the relative movement trend between different floating tubes in the vertical and horizontal directions. Furthermore, the steel columns connected to the same main steel beam are all connected to the same floating tube, and elastic connection nodes are provided at the connection points. Therefore, after the platform part is subjected to wave loads, the platform part mainly transmits vertical loads and internal forces along the left-right directions to the steel structure part. After the vertical load is dissipated through the elastic connection nodes below, the forces transmitted inside the steel structure are mainly along the left-right directions. At this time, the floating connection between the main steel beam and the steel column, and between the main steel beam and the secondary steel beam can be used for further dissipation, thereby realizing the decomposition and dissipation of wave loads in different directions and the step-by-step dissipation of wave loads by first relying on elastic deformation and then relying on resistant floating connections. This not only reduces the force on each component, but also greatly simplifies the force conditions of the components, thereby improving the wave resistance and durability of the entire device.

[0026] 4. A limiting device is also provided at the elastic connection node, which can ensure that the spring is always within the range of elastic deformation by constraining the relative displacement of the upper connection part and the lower connection part.

[0027] 5. Flexible supports can not only improve the load-bearing capacity of the steel structure itself, but also assist the components of the steel structure to return to their initial positions after the load disappears, so that each floating connection node can repeatedly play an energy-dissipating role.

[0028] 6. The strip holes at the floating connection can prevent excessive relative displacement between components, ensure that the flexible support is always within the range of elastic deformation, and play a role in protecting the flexible support. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a top view of the platform part and the bottom plate;

[0030] Figure 2 for Figure 1 A magnified view of part A;

[0031] Figure 3 for Figure 2 BB view;

[0032] Figure 4 for Figure 2 C-direction view;

[0033] Figure 5 is a schematic diagram of the connection between the connection mechanism and the floating tube;

[0034] Figure 6 This is a top view of the steel structure;

[0035] Figure 7 for Figure 6 A magnified view of part D in the middle;

[0036] Figure 8 for Figure 7 H-direction view;

[0037] Fig. 9 for Figure 6 An enlarged view of part E;

[0038] Fig.10 for Figure 6 G-direction view;

[0039] Fig.11 for Figure 6 F-direction view;

[0040] Fig.12 It is a three-dimensional schematic diagram of the steel structure part.

[0041] Reference numerals:

[0042] 1. Floating pipe, 2. Connecting module, 3. Bottom plate, 4. Upper connecting part, 5. Limiting sleeve, 6. First limiting rod, 7. Lower connecting part, 8. First connecting plate, 9. Upper clamp, 10. Lower clamp, 11. Rope, 12. Connecting pipe, 13. Limiting frame, 14. Spring, 15. Second limiting rod, 16. Steel column, 17. Pad, 18. Main steel beam, 19. Second steel beam, 20. Second flexible support, 21. Second connecting plate, 22. First strip hole, 23. Connecting angle steel, 24. Second strip hole, 25. Sliding plate, 26. Third connecting plate, 27. First flexible support. DETAILED DESCRIPTION

[0043] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0044] A photovoltaic support bearing device based on an offshore floating platform is characterized by comprising a platform part and a steel structure part installed on the platform part.

[0045] like Figures 1 to 3 The platform part includes a plurality of floating tubes 1 arranged in the front-to-back direction and arranged in the left-to-right direction, and adjacent floating tubes 1 are connected by connecting modules 2. Specifically, the floating tubes 1 and connecting modules 2 are both made of PE material, and the floating tubes 1 are fixed to the bottom of the connecting module 2 by a clamp structure, and adjacent connecting modules 2 are connected by corrosion-resistant fasteners and binding ropes. Furthermore, multiple rows of connecting modules 2 are arranged in the front-to-back direction in the platform part to ensure a firm connection.

[0046] like Figure 6 , Fig.10 , Fig.11 and Fig.12 The steel structure part includes a plurality of steel columns 16 arranged in a matrix form (two rows and three columns in this embodiment), and also includes a plurality of main steel beams 18 arranged in the front-back direction and a plurality of secondary steel beams 19 arranged in the left-right direction. The main steel beams 18 are installed on the top of the steel columns 16, and the secondary steel beams 19 are connected between adjacent main steel beams 18, and the main steel beams 18 and the corresponding steel columns 16 and the main steel beams 18 and the corresponding secondary steel beams 19 are all floatingly connected. The lower end of the steel column 16 is connected to the platform part through an elastic connection node, and the elastic connection node at the lower end of the steel column 16 corresponding to the same main steel beam 18 is connected to the same floating tube 1.

[0047] Specifically, Figure 4 and Figure 5A connection mechanism is installed on the floating tube 1 corresponding to the main steel beam 18. The connection mechanism is made of PE material and includes a first connection plate 8, a connection pipe 12 and an upper clamp 9 which are fixedly connected as one from top to bottom, and also includes a lower clamp 10. The upper clamp 9 and the lower clamp 10 are connected and fixed on the floating tube 1 through PE pins, and then connected to the first connection plate 8 above through a nylon rope 11.

[0048] The steel column 16 is a round tube column, which has a large rigidity and a uniform resistance to wave loads in all directions. The lower end of the round tube column is connected to a bottom plate 3, and a rib plate is connected between the round tube column and the bottom plate 3. A through hole is opened in the center of the bottom plate 3, and the diameter of the through hole is smaller than the inner diameter of the round tube column. The round tube column and the bottom plate 3 are connected by welding, and the welding is located at the bottom of the inner hole of the round tube column, and a pad 17 is provided at the weld.

[0049] The elastic connection node includes an upper connection part 4, a lower connection part 7, and a spring 14 connected between the upper connection part 4 and the lower connection part 7. The upper connection part 4 is connected to the bottom plate 3 by fasteners, and the lower connection part 7 is connected to the first connection plate 8 by fasteners, thereby realizing the connection between the lower end of the steel column 16 and the platform part.

[0050] Furthermore, there are multiple groups of springs 14 in each group of elastic connection nodes, which are arranged in a matrix form with the corresponding steel column 16 as the center. In this embodiment, there are four groups of springs 14.

[0051] Furthermore, a horizontal limiting mechanism and a vertical limiting mechanism are provided between the upper connecting portion 4 and the lower connecting portion 7 .

[0052] The horizontal limiting mechanism includes a limiting sleeve 5 welded to the bottom of the upper connecting part 4 and a first limiting rod 6 installed on the lower connecting part 7, and the first limiting rod 6 passes upward through the limiting sleeve 5. When the upper connecting part 4 and the lower connecting part 7 move relative to each other beyond a preset range, the first limiting rod 6 touches the limiting sleeve 5 to prevent the spring 14 from being deformed significantly and failing.

[0053] Furthermore, the upper end of the first limiting rod 6 passes through the upper connecting portion 4 and the bottom plate 3 and is connected to two sets of nuts.

[0054] The vertical limiting mechanism includes a second limiting rod 15 fixed on the upper connecting part 4 and a limiting frame 13 installed on the lower connecting part 7. The second limiting rod 15 passes downward through the transverse plate on the limiting frame 13 and is connected to the limiting nut, so that the spring 14 is always within the range of elastic deformation.

[0055] In this embodiment, the horizontal limiting mechanisms and the vertical limiting mechanisms are each in groups of four, and are located at the four corners of the bottom plate 3 .

[0056] Furthermore, if Figure 6 and Figure 8 The floating connection between the main steel beam 18 and the corresponding steel column 16 means that: the bottom of the main steel beam 18 is provided with a second connecting plate 21, the upper end of the corresponding steel column 16 is connected with a third connecting plate 26, and a sliding plate 25 made of polytetrafluoroethylene plate is provided between the second connecting plate 21 and the third connecting plate 26. A through hole smaller than the inner diameter of the circular tube column is provided at the center of the third connecting plate 26, and the connection between the third connecting plate 26 and the circular tube column is achieved by welding from the inside. The second connecting plate 21, the sliding plate 25 and the third connecting plate 26 are provided with first strip holes 22 corresponding to each other in position for achieving the connection of the fasteners between the three, and the first strip holes 22 are arranged in the left and right directions. The polytetrafluoroethylene plate not only has the characteristics of excellent corrosion resistance and low friction coefficient, but also has the excellent quality of high impact resistance and wear resistance. Through the above structure, not only can the connection of the steel column 16 and the main steel beam 18 in the vertical direction be achieved, but also the two can be made to move relative to each other in the left and right directions within the limited range of the first strip hole 22 to dissipate the load.

[0057] Furthermore, if Figure 6 and Figure 7 The floating connection between the main steel beam 18 and the corresponding secondary steel beam 19 means that a pair of connecting angle steels 23 are fixedly installed on the side of the main steel beam 18, and the end of the corresponding secondary steel beam 19 is located between the pair of connecting angle steels 23. The connecting angle steels 23 and the secondary steel beam 19 are provided with second strip holes 24 with corresponding positions for fastener connection between the three, and the second strip holes 24 are arranged in the left-right direction. There is a certain gap between the end of the secondary steel beam 19 and the corresponding main steel beam 18. This structure can not only realize the connection between the main steel beam 18 and the secondary steel beam 19, but also enable the two to move relative to each other in the left-right direction within the limited range of the second strip hole 24.

[0058] In this embodiment, the main steel beam 18 and the secondary steel beam 19 are both rectangular tubes. They are located at the end of the load transmission and mainly bear the weight of the photovoltaic module and the snow load. The rectangular tube can meet the use requirements and reduce the cost. Furthermore, the end of the rectangular tube is welded with an end plate, and the end plate is provided with an opening.

[0059] The steel structure also includes a first flexible support member 27 connected between the steel column 16 and the main steel beam 18 connected to the top thereof, and / or connected between the steel column 16 and the secondary steel beam 19 connected to the top thereof via the main steel beam 18. Specifically, Fig.10 and Fig.11In the first flexible support member 27, plug plates are inserted at both ends of the round tube, and the round tube and the plug plates are welded together. The plug plates at both ends are respectively connected to the connecting plates on the main steel beam 18 and the ribs at the lower end of the steel column 16. The first flexible support member 27 is arranged in pairs in a gate-shaped structure, forming a triangular structure with the column and the beam. On the one hand, it effectively supports the main steel beam 18 and the secondary steel beam 19, and on the other hand, it can also be elastically deformed when relative movement occurs at the sliding plate 25 and the connecting angle steel 23, and restore the secondary steel beam 19 and the main steel beam 18 to their original positions after the load disappears, thereby ensuring that the floating connection node plays a role in dissipating the load again when the next load arrives.

[0060] The steel structure also includes second flexible supports 20 connected between adjacent main steel beams 18, and two groups of cross-arranged second flexible supports 20 are provided between each group of adjacent main steel beams 18. Figure 6 , Fig. 9 and Fig.12 The second flexible support 20 is also composed of a round tube (or round steel bar) and plug plates (or welded plates) at both ends, and the plug plates (or welded plates) are connected to the connecting plates on the main steel beam 18. When it is a round steel bar, the two round steel bars can be connected together and tensioned by stainless steel basket bolts. The second flexible support 20 is also used for elastic support and position recovery of the main steel beam 18.

[0061] Preferably, the stiffness of the round tube in the first flexible support member is greater than the stiffness of the round tube (or round steel bar) in the second flexible support member.

[0062] During production, the materials are first cut and processed in the workshop, especially ensuring that the bottom plate 3, the third connecting plate 26 and the end plate are all open structures to meet the need that both ends of the workpiece must be open structures during the hot-dip galvanizing process. Then, the welding of the steel column 16 with the bottom plate 3 and the third connecting plate 26, the welding of the limit sleeve 5 of the upper connecting part 4, the welding of the lower connecting part 7 with the limit frame 13, and the welding of each rectangular tube with the end plate and the connecting plate are completed respectively. After the welding of each steel part is completed, the hot-dip galvanizing process surface treatment is carried out respectively, so that a certain thickness of zinc layer is attached to the inner and outer surfaces of the workpiece to improve corrosion resistance. Finally, fasteners coated with PTFE (fluoropolymer) are used to complete the connection and installation between the components. The fasteners include bolts, screws, nuts, gaskets, etc.

[0063] After the platform part is subjected to wave load, the platform part mainly transmits vertical load and internal force in the left-right direction to the steel structure part. After the vertical load is dissipated through the elastic connection node below, the force transmitted inside the steel structure is mainly in the left-right direction. At this time, the floating connection between the main steel beam 18 and the steel column 16 and between the main steel beam 18 and the secondary steel beam 19 is used for further dissipation, thereby realizing the decomposition and dissipation of wave loads in different directions and the step-by-step dissipation that first relies on elastic deformation and then relies on resistance-type floating connection. It not only reduces the force size of each component, but also greatly simplifies the force situation of the components, thereby improving the wave resistance and durability of the entire device.

[0064] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. The scope of the present invention is defined by the claims rather than the above description.

Claims

1. A photovoltaic support bearing device based on an offshore floating platform, characterized by: It includes a platform part and a steel structure part installed on the platform part; The steel structure portion includes a plurality of steel columns (16) arranged in a matrix form, and also includes a plurality of main steel beams (18) arranged in a front-to-rear direction and a plurality of secondary steel beams (19) arranged in a left-to-right direction, wherein the main steel beams (18) are installed on the top of the steel columns (16), and the secondary steel beams (19) are connected between adjacent main steel beams (18); the main steel beams (18) and the corresponding connected steel columns (16) and the main steel beams (18) and the corresponding connected secondary steel beams (19) are all floating connections; The lower end of the steel column (16) is connected to the platform portion via an elastic connection node; The floating connection between the main steel beam (18) and the corresponding connected steel column (16) means that a second connecting plate (21) is provided at the bottom of the main steel beam (18), a third connecting plate (26) is connected to the upper end of the corresponding steel column (16), a sliding plate (25) is provided between the second connecting plate (21) and the third connecting plate (26), and first strip holes (22) are provided on the second connecting plate (21), the sliding plate (25) and the third connecting plate (26) at positions corresponding to each other for realizing fastener connection between the three, and the first strip holes (22) are arranged in the left-right direction; The floating connection between the main steel beam (18) and the corresponding secondary steel beam (19) means that a pair of connecting angle steels (23) are fixedly installed on the side of the main steel beam (18), and the end of the corresponding secondary steel beam (19) is located between the pair of connecting angle steels (23). The connecting angle steels (23) and the secondary steel beam (19) are provided with second strip holes (24) at positions corresponding to each other for realizing fastener connection between the three, and the second strip holes (24) are arranged in the left-right direction; The platform portion comprises a plurality of floating tubes (1) arranged in a front-to-back direction and arranged left-to-right, and adjacent floating tubes (1) are connected via connection modules (2); The elastic connection nodes at the lower ends of the steel columns (16) connected to the same main steel beam (18) are connected to the same floating tube (1); The elastic connection node comprises an upper connection portion (4), a lower connection portion (7), and a spring (14) connected between the upper connection portion (4) and the lower connection portion (7); The lower end of the steel column (16) is connected to the bottom plate (3), and the upper connecting portion (4) is connected to the bottom plate (3) via a fastener; The lower connecting portion (7) is connected to the floating tube (1) via a connecting mechanism.

2. The photovoltaic support bearing device based on an offshore floating platform according to claim 1, characterized in that: A horizontal limiting mechanism is further provided between the upper connecting portion (4) and the lower connecting portion (7), the horizontal limiting mechanism comprising a limiting sleeve (5) fixed on the upper connecting portion (4) and a first limiting rod (6) mounted on the lower connecting portion (7), the first limiting rod (6) passing through the limiting sleeve (5).

3. The photovoltaic support bearing device based on an offshore floating platform according to claim 1, characterized in that: A vertical limiting mechanism is further provided between the upper connecting portion (4) and the lower connecting portion (7), the vertical limiting mechanism comprising a second limiting rod (15) fixed on the upper connecting portion (4) and a limiting frame (13) mounted on the lower connecting portion (7), the second limiting rod (15) passing downward through a horizontal plate on the limiting frame (13) and then connected to a limiting nut.

4. The photovoltaic support bearing device based on an offshore floating platform according to claim 1, characterized in that: There are multiple groups of springs (14) in each group of elastic connection nodes, which are arranged in a matrix form with the corresponding steel column (16) as the center.

5. The photovoltaic support bearing device based on an offshore floating platform according to claim 1, characterized in that: The steel structure portion further includes a first flexible support member (27) connected between the steel column (16) and a main steel beam (18) connected to its top, and / or connected between the steel column (16) and a secondary steel beam (19) correspondingly connected to its top via the main steel beam (18).

6. The photovoltaic support bearing device based on an offshore floating platform according to claim 1, characterized in that: The steel structure portion further comprises second flexible support members (20) connected between adjacent main steel beams (18), and two groups of cross-arranged second flexible support members (20) are provided between each group of adjacent main steel beams (18).

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