Photovoltaic support bearing device steel beam column mechanism based on offshore floating platform

Abstract

The utility model discloses a photovoltaic support bearing device steel beam column mechanism based on an offshore floating platform, which comprises a steel column and main steel beams vertically arranged at the top of the steel column, secondary steel beams are vertically connected between the adjacent main steel beams, a connecting part is arranged at the joint of the steel column and the main steel beams, and the connecting part comprises a sliding plate; the connecting part is provided with a long-strip-shaped hole with the length direction consistent with the length direction of the secondary steel beam. Strip-shaped holes with the length direction consistent with the length direction of the secondary steel beams are formed in connecting pieces of the main steel beams and the secondary steel beams, and gaps are reserved between the ends of the secondary steel beams and the side faces of the main steel beams. The mechanism further comprises a flexible supporting piece. According to the utility model, wave energy is dissipated through the polytetrafluoroethylene sliding plate and the strip-shaped hole at the connecting part between the steel column and the main steel beam, and the strip-shaped hole and the flexible supporting piece at the connecting part between the main steel beam and the secondary steel beam, so that the problem of insufficient durability of the steel beam column mechanism of the photovoltaic bracket bearing device of the offshore floating platform under the wave load is solved.

Description

Technical Field

[0001] The utility model relates to the field of steel structures of offshore floating platforms, and particularly relates to a steel beam-column mechanism of a photovoltaic bracket bearing device based on an offshore floating platform. Background Art

[0002] With the rapid development of the offshore photovoltaic industry, the offshore power generation system has been able to rely on electrical components such as grid-connected inverters to achieve power transmission from the power generation end to the use end. In the existing photovoltaic bracket bearing devices, the beam and column are mainly connected by welding or bolted fixed connection. However, the floating platform floats on the sea all year round, and the wave energy at sea will be transmitted to the steel beam-column mechanism through the floating platform. Due to the significant randomness and uncertainty of the wave load, the steel beam-column mechanism is frequently subjected to impact loads and is prone to fatigue failure, affecting the durability of the steel structure. Summary of the Utility Model

[0003] The utility model provides a steel beam-column mechanism of a photovoltaic bracket bearing device based on an offshore floating platform, and the purpose is to solve the problem of insufficient durability of the steel beam-column mechanism of the photovoltaic bracket bearing device on the offshore floating platform affected by wave loads.

[0004] The technical solution of the utility model is as follows:

[0005] A steel beam-column mechanism of a photovoltaic bracket bearing device based on an offshore floating platform includes a steel column and a main steel beam vertically arranged on the top of the steel column. A secondary steel beam is vertically connected between adjacent main steel beams. A connecting part is provided at the connection between the steel column and the main steel beam, and the connecting part includes a sliding plate; the main steel beam and the secondary steel beam are connected by a first connecting piece, and a strip hole is provided at the connection where the first connecting piece and the secondary steel beam are fastened, and the length direction of the strip hole is the same as the length direction of the secondary steel beam; a gap is left between the end of the secondary steel beam and the side of the main steel beam.

[0006] Furthermore, the connecting part is provided with a long strip hole for cooperating with the fastener, and its length direction is the same as the length direction of the secondary steel beam.

[0007] Furthermore, the connecting part includes a first connecting plate fixedly connected to the bottom surface of the main steel beam and a second connecting plate fixedly connected to the top end of the steel column, and the sliding plate is arranged between the first connecting plate and the second connecting plate; the long strip hole is opened on the first connecting plate, the sliding plate and the second connecting plate, and the first connecting plate, the sliding plate and the second connecting plate are connected by fasteners passing through the long strip hole.

[0008] Furthermore, the sliding plate is a polytetrafluoroethylene plate.

[0009] Furthermore, the width of the gap between the end of the secondary steel beam and the side of the main steel beam is 15 mm.

[0010] Further, both the main steel beam and the secondary steel beam are rectangular steel pipe beams.

[0011] Further, stiffening plates are fixed at both ends of the secondary steel beam, and rectangular through holes are provided on the stiffening plates.

[0012] Further, a first flexible support member is also included, which is connected between the steel column and the main steel beam connected to its top, and / or between the steel column and the secondary steel beam correspondingly connected to its top through the main steel beam.

[0013] Further, a second flexible support member is also included, which is cross-connected between adjacent main steel beams.

[0014] Compared with the prior art, the present utility model has the following positive effects:

[0015] (1) In the present utility model, a sliding plate and a long slot are provided at the connection part between the main steel beam and the steel column, and a strip hole is provided on the first connecting member between the main steel beam and the secondary steel beam. When wave loads are transmitted from the steel column, relative displacements can occur between the steel column and the main steel beam, and between the main steel beam and the secondary steel beam to dissipate wave energy, which can effectively prevent fatigue damage of the steel beam-column structure under frequent wave loads and improve the durability of the steel structure.

[0016] (2) The long slot, the strip hole and the flexible support member can limit the relative displacement between components, so that after the load disappears, the entire mechanism can be reset through the elastic deformation ability of the beam-column and the flexible support member, thereby repeatedly playing the energy dissipation role. Description of the Drawings

[0017] Figure 1 It is the front view of the steel beam-column structure;

[0018] Figure 2 It is the schematic top view structure of the steel beam-column structure;

[0019] Figure 3 It is the partial enlarged view of node A;

[0020] Figure 4 It is the schematic connection structure diagram of the main steel beam and the steel column;

[0021] Figure 5 It is the schematic connection structure diagram of the main steel beam and the secondary steel beam;

[0022] Figure 6 It is the installation schematic diagram of the first connecting member.

[0023] In the figure, 1 is the main steel beam; 2 is the secondary steel beam; 3 is the steel column; 4 is the first flexible support; 5 is the first connecting part; 6 is the second connecting part; 7 is the first connecting plate; 8 is the sliding plate; 9 is the second connecting plate; 10 is the strip-shaped hole; 11 is the first connecting piece; 12 is the stiffening plate; 13 is the second flexible support; 14 is the third connecting part. Detailed implementation mode

[0024] The technical solution of the present utility model will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0025] As Figure 1 , Figure 2 and Figure 3 , a steel beam-column mechanism of a photovoltaic bracket bearing device based on an offshore floating platform includes a plurality of steel columns 3 arranged in a matrix and a plurality of main steel beams 1 vertically arranged on the tops of the steel columns 3, and secondary steel beams 2 are vertically connected between adjacent main steel beams 1. Both the main steel beam 1 and the secondary steel beam 2 are rectangular steel pipe beams and their top surfaces are flush. Stiffening plates 12 are fixed at both ends of the secondary steel beam 2, and rectangular through holes are provided on the stiffening plates 12 for facilitating hot-dip galvanizing treatment of the components.

[0026] This mechanism also includes flexible supports. The flexible supports include a first flexible support 4 connected between the steel column 3 and the main steel beam 1 connected to its top, and / or connected between the steel column 3 and the secondary steel beam 2 corresponding to the main steel beam 1 connected to its top; and a second flexible support 13 cross-arranged between adjacent main steel beams 1. The steel column 3 is at the front end of the force transmission path and is subjected to a large wave load. The first flexible support 4 connected between the steel column 3 and the main steel beam 1 or the secondary steel beam 2 uses a round tube with a larger stiffness. The main steel beam 1 is at the rear end of the force transmission path and is subjected to a small wave load. The second flexible support 13 between the main steel beams 1 uses a round steel with a smaller stiffness. In this way, while forming a stable force triangle and ensuring the structural safety, the economy can be taken into account.

[0027] In the first flexible support member 4, both ends of the round tube are inserted and welded on the connecting plug board, serving as the first connecting portion 5 for connecting with the steel column 3 and the second connecting portion 6 for connecting with the main steel beam 1 or the secondary steel beam 2. The first flexible support member 4 is arranged in a portal shape. The second connecting portion 6 is connected to the connecting plate fixed on the main steel beam 1 or the secondary steel beam 2 through a stainless steel pin. The first connecting portion 5 is connected to the stiffener at the bottom of the steel column 3 through a stainless steel pin. This connection method forms a stable triangular stress structure, and the first flexible support member 4 can bear tensile force and compressive force. In the second flexible support member 13, connecting plates are welded at both ends of the round steel, serving as the third connecting portion 14. The third connecting portion 14 is fixedly connected to the connecting plate on the main steel beam 1 through a stainless steel pin, forming a stable triangular stress structure. The second flexible support member 13 only bears tensile force, so it is arranged in a cross shape and tightened with a turnbuckle.

[0028] As Figure 4 shown, a connecting portion is provided between the steel column 3 and the main steel beam 1. The connecting portion includes a first connecting plate 7 fixed to the bottom surface of the main steel beam 1 and a second connecting plate 9 fixed to the top end of the steel column 3. The second connecting plate 9 is made of thickened steel plate to ensure the strength and stiffness at the connection between the steel column 3 and the main steel beam 1. To facilitate welding and meet the anti-corrosion process of hot-dip galvanized marine steel members, a through hole is opened in the center of the second connecting plate 9, and the hole diameter is smaller than the inner diameter of the steel column 3. A sliding plate 8 is connected between the first connecting plate 7 and the second connecting plate 9. The sliding plate 8 is a polytetrafluoroethylene plate. The first connecting plate 7, the second connecting plate 9 and the sliding plate 8 are connected by screws, and two groups of anti-loosening nuts are respectively connected to both ends of the screw. The screw connection holes are all long holes, and the length direction of the long holes is consistent with the length direction of the secondary steel beam 2.

[0029] As Figure 5 and Figure 6 shown, the main steel beam 1 and the secondary steel beam 2 are connected by a first connecting member 11. The first connecting member 11 is an angle steel. One limb is fixed on the side surface of the main steel beam 1, and the other limb is connected to the side surface of the secondary steel beam 2 through a screw. The screw connection holes on the first connecting member 11 and the secondary steel beam 2 are strip holes 10 with the length direction consistent with the length direction of the secondary steel beam 2. A gap is left between the end of the secondary steel beam 2 and the side surface of the main steel beam 1, and the gap width is 10 - 20 mm, preferably 15 mm.

[0030] Construction method:

[0031] When processing the steel column components, cut the steel column 3, the second connecting plate 9, the bottom plate and the stiffeners in the processing workshop. To meet the requirements of the hot-dip galvanizing process, first, drill through holes corresponding to the internal cavities of the steel column 3 on the second connecting plate 9 and the bottom plate respectively. The diameter of the drilled through holes is smaller than the inner diameter of the steel column 3. Then, drill standard screw connection holes at the four corners of the bottom plate, and drill long screw connection holes on the second connecting plate 9. The length direction of the long holes is the same as the length direction of the secondary steel beam 2; butt-weld the second connecting plate 9 to the top of the steel column 3, and weld the bottom of the steel column 3 to the bottom plate and the stiffeners together to form the steel column components, and finally carry out the hot-dip galvanizing treatment.

[0032] When processing the main steel beam components, cut the rectangular steel pipe beam, the first connecting plate 7 and the first connecting piece 11 in the processing workshop. First, drill long holes on the first connecting plate 7. Then, weld and connect the rectangular steel pipe beam and the first connecting plate 7 by continuous fillet welds on both sides of the steel beam. Finally, weld one limb of the two groups of first connecting pieces 11 to the installation position corresponding to the secondary steel beam 2 on the side of the main steel beam 1. After forming the main steel beam components, carry out the hot-dip galvanizing treatment on them.

[0033] When processing the sliding plate 8, cut the polytetrafluoroethylene plate in the processing workshop, and drill long holes at the four corners of the polytetrafluoroethylene plate. The positions, shapes and sizes of the holes are the same as those of the long holes on the first connecting plate 7 and the second connecting plate 9.

[0034] When processing the secondary steel beam components, cut the rectangular steel pipe beam according to the distance between the inner edges of adjacent main steel beams 1 reduced by 30 mm, and process the stiffening plates 12 with rectangular holes opened. First, open strip holes 10 with the same shape and size corresponding to the connection holes of the first connecting piece 11 on both sides of the secondary steel beam 2 respectively. Then, weld the stiffening plates 12 to both ends of the secondary steel beam 2 to form the secondary steel beam components, and finally carry out the hot-dip galvanizing treatment.

[0035] When processing the flexible support components, cut the circular steel pipes required for the first flexible support 4, the round steel required for the second flexible support 13 and the required connecting pieces in the processing workshop, assemble the first flexible support 4 and the second flexible support 13, and carry out the hot-dip galvanizing process treatment on the assembled above-mentioned components respectively.

[0036] On-site assembly, use fasteners with the surface coated with PTFE (fluoropolymer) to connect each part. First, fix the steel column components vertically, then place the sliding plate 8 and the main steel beam 1 on the top of the steel column components in turn. After adjusting the positions of the long holes to be the same, fix them with fasteners. Then, adjust the strip holes 10 of the secondary steel beam 2 and the first connecting piece 11 to be the same and connect them with fasteners. Finally, fixedly connect the flexible support components with the corresponding structural components.

[0037] It should be noted that for those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. The scope of the present utility model is defined by the claims rather than the above description.

Claims

1. A steel beam-column mechanism of a photovoltaic bracket bearing device based on an offshore floating platform, comprising a steel column (3) and a main steel beam (1) vertically arranged on the top of the steel column (3), and a secondary steel beam (2) is vertically connected between adjacent main steel beams (1), characterized in that: A connecting part is provided at the connection between the steel column (3) and the main steel beam (1), and the connecting part includes a sliding plate (8). The main steel beam (1) and the secondary steel beam (2) are connected by a first connecting piece (11). A strip hole (10) is provided at the connection where the first connecting piece (11) and the secondary steel beam (2) are fastened. The length direction of the strip hole (10) is the same as the length direction of the secondary steel beam (2). A gap is left between the end of the secondary steel beam (2) and the side surface of the main steel beam (1).

2. The steel beam-column mechanism of the photovoltaic bracket bearing device based on the offshore floating platform according to claim 1, characterized in that: The connecting part is provided with a long hole for cooperating with a fastener, and its length direction is the same as the length direction of the secondary steel beam (2).

3. The steel beam-column mechanism of the photovoltaic support bearing device based on the offshore floating platform according to claim 2, wherein: The connecting part includes a first connecting plate (7) fixedly connected to the bottom surface of the main steel beam (1) and a second connecting plate (9) fixedly connected to the top end of the steel column (3). The sliding plate (8) is arranged between the first connecting plate (7) and the second connecting plate (9). The long hole is opened on the first connecting plate (7), the sliding plate (8) and the second connecting plate (9). The first connecting plate (7), the sliding plate (8) and the second connecting plate (9) are connected by fasteners passing through the long hole.

4. The steel beam-column mechanism of the photovoltaic support bearing device based on an offshore floating platform according to claim 1, wherein: The sliding plate (8) is a polytetrafluoroethylene plate.

5. The steel beam-column mechanism of the photovoltaic bracket bearing device based on the offshore floating platform according to claim 1, wherein: The width of the gap between the end of the secondary steel beam (2) and the side surface of the main steel beam (1) is 15 mm.

6. The steel beam-column mechanism of the photovoltaic support bearing device based on the offshore floating platform according to claim 1, wherein: Both the main steel beam (1) and the secondary steel beam (2) are rectangular steel pipe beams.

7. The steel beam-column mechanism of the photovoltaic support bearing device based on the offshore floating platform according to claim 1, wherein: Stiffening plates (12) are fixed at both ends of the secondary steel beam (2), and rectangular through holes are opened on the stiffening plates (12).

8. The steel beam-column mechanism of the photovoltaic support bearing device based on the offshore floating platform according to claim 1, characterized in that: It further includes a first flexible support member (4) connected between the steel column (3) and the main steel beam (1) connected to its top, and / or connected between the steel column (3) and the secondary steel beam (2) corresponding to the connection through the main steel beam (1) at its top.

9. The steel beam-column mechanism of the photovoltaic bracket bearing device based on the offshore floating platform according to claim 1, wherein: It further includes a second flexible support member (13) cross-connected between adjacent main steel beams (1).

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