Large-span two-end cable-stayed flexible photovoltaic support

Abstract

The utility model relates to a large-span two-end cable-stayed flexible photovoltaic support, which comprises two upright post assemblies, the at least two assembly cables are fixed between the two stand column assemblies in parallel and are used for installing photovoltaic assemblies; at least two upper wind-resistant cables are fixed to each stand column assembly, one end of each upper wind-resistant cable is connected with the top of the corresponding stand column assembly, and the other end of each upper wind-resistant cable is connected with the corresponding assembly cable; at least two lower wind-resistant cables are fixed to each stand column assembly, one end of each lower wind-resistant cable is connected with the assembly cable, and the other end of each lower wind-resistant cable is connected with the bottom of the corresponding stand column assembly. By arranging the upper wind-resistant cable and the lower wind-resistant cable, downward deformation caused by self weight and wind pressure of the photovoltaic module and upward deformation caused by wind suction can be resisted, the bearing capacity and the stability of the structure are maintained, meanwhile, the spanning capacity and the scene adaptation capacity of the structure are enhanced, and the construction cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic power stations, in particular to a large-span, two-end obliquely-stayed flexible photovoltaic bracket. Background Art

[0002] Due to the scarcity of land resources, photovoltaic power stations are gradually being built in complex terrains such as mountainous areas. In some areas, it is even necessary to combine fisheries and agriculture with photovoltaic power generation. The traditional single-layer suspension cable flexible photovoltaic support structure has problems such as limited span capacity and large cable force. This type of support structure can no longer be adapted to large-span scenes such as deep water and large-span fish ponds, tidal flat farmland with poor geological conditions, and mountainous areas. Therefore, in order to adapt to the large-span requirements of different scenes and expand the application prospects of flexible photovoltaic support structures, designing a large-span structure that can span different scenes has become the focus of flexible photovoltaic support structures.

[0003] Flexible photovoltaic support structures are sensitive to wind loads, especially in areas with strong winds and high winds, where the wind suction effect they withstand is often stronger than the wind pressure effect. Although the traditional single-layer suspension cable flexible photovoltaic support structure can withstand the strong wind load acting on the photovoltaic modules, its spanning capacity is limited and it cannot achieve a large span. When the span exceeds a certain value, the cable specifications are usually required to be higher. Although the conventional three-cable truss flexible photovoltaic support structure can achieve a large span, the load-bearing cables often have weak resistance to the vertical wind suction load acting on the surface of the module, and the structure will produce a large vertical displacement, thereby causing damage to the photovoltaic modules. In addition, the three-cable structure usually requires the arrangement of a large number of supporting rods, and the construction is cumbersome. Therefore, how to achieve a large span while limiting the deformation of the flexible photovoltaic support structure under wind pressure and wind suction has become a research focus. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the purpose of the utility model is to provide a large-span, two-end inclined flexible photovoltaic bracket.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A large-span, two-end inclined flexible photovoltaic support, the photovoltaic support comprising:

[0007] Two column assemblies;

[0008] At least two component cables are fixed in parallel between the two column components for installing photovoltaic components;

[0009] Upper wind-resistant cables, at least two of which are fixed on each of the column assemblies, one end of each of the upper wind-resistant cables being connected to the top of the column assembly and the other end being connected to the assembly cable;

[0010] And lower wind-resistant cables, at least two of which are fixed on each of the column assemblies, one end of each of the lower wind-resistant cables being connected to the assembly cable, and the other end being connected to the bottom of the column assembly.

[0011] Preferably, according to the present invention, the bracket further comprises a cross brace member; the cross brace member is used to connect the cables of each component.

[0012] Preferably, according to the utility model, the column assembly includes two columns arranged in parallel and a crossbeam arranged between the two columns; the end of the assembly cable is fixed on the crossbeam.

[0013] Preferably, the distance between the top of the column assembly and the crossbeam is 1 / 3 to 1 / 2 of the height of the column assembly. The horizontal distance between the position where the upper wind-resistant cable is connected to the assembly cable and the column assembly, and the horizontal distance between the position where the lower wind-resistant cable is connected to the assembly cable and the column assembly are both 1 / 2 to 3 / 2 of the height of the column assembly.

[0014] The vertical upward load borne by the flexible photovoltaic support structure is the most unfavorable load; when the distance between the top of the column assembly and the crossbeam is 1 / 3 to 1 / 2 of the height of the column assembly, the wind pressure deformation limit requirement is met. When the horizontal distance between the position where the wind-resistant cable is connected to the assembly cable and the column assembly is 1 / 2 to 3 / 2 of the height of the column assembly, the most unfavorable vertical upward wind load can be best resisted.

[0015] Preferably, according to the present invention, a stay cable is provided on the column assembly.

[0016] According to the preferred embodiment of the utility model, the inclined cables are respectively arranged at the corresponding connection positions of the component cables and the upper and lower wind-resistant cables, and the connection positions can be designed as an independent whole for coordinated work when connected. The cables in the utility model can be connected to the columns, or they can be made into an independent node to connect different cables. The lower wind-resistant cable can be connected to the bottom of the column or to the top of the column according to the actual wind force level.

[0017] Preferably, according to the utility model, the component cable, the upper wind-resistant cable, the lower wind-resistant cable and the inclined cable are all hot-dip galvanized steel strands.

[0018] Preferably, according to the present invention, the diameters of the component cable, the upper wind-resistant cable, the lower wind-resistant cable and the inclined cable are all in the range of 12 to 25 mm.

[0019] Preferably, according to the present invention, a transverse support is provided between the upright column and the cross beam.

[0020] (1) The utility model can resist the downward deformation caused by the weight and wind pressure of the photovoltaic components of the flexible photovoltaic support structure and the upward deformation caused by wind suction by setting the upper and lower wind-resistant cables on the column components on both sides. At the same time, the wind load effect is reduced, thereby maintaining the bearing capacity and stability of the structure. The setting of the wind-resistant cables improves the overall rigidity of the structure, and works together with the component cables to form a spatial cable network, greatly improving the wind resistance of the structure.

[0021] (2) The utility model achieves controllable effects of different wind loads by adjusting the vertical distance between the upper and lower wind-resistant cables and the component cables, as well as the horizontal connection distance with the component cables. The establishment of two columns enables the inclination angle of the component cables to be adjustable.

[0022] (3) The upper and lower wind-resistant cables in the utility model are simple and reliable. Compared with the traditional single-layer suspension cable flexible photovoltaic support structure, the utility model can improve the site spanning capacity, effectively reduce the phenomenon of cable force surge due to the increase in span, and realize the adjustable cable force of different spans. Compared with the current conventional cable truss flexible photovoltaic support structure, while maintaining the same performance, the setting of the upper and lower wind-resistant cables reduces the construction difficulty and complexity of the cable truss, and has strong operability.

[0023] (4) The large-span, two-end inclined flexible photovoltaic bracket described in the utility model can reduce the flexibility of the two-side inclined brackets that wind pressure and wind suction effects can have. The flexible photovoltaic bracket described in the utility model has enhanced adaptability to scenes and is widely applicable to complex terrain conditions. It can be used in areas such as reservoirs, fish ponds, ravines, and rivers where it is difficult to provide intermediate support for the structure and where it is difficult to use fixed brackets supported by traditional steel beams. In particular, it reduces the process of construction above rivers and undulating mountain scenes, reducing the difficulty of photovoltaic design and construction. It meets the purpose of economy and ensures the safety of photovoltaic components and structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the large-span, two-end inclined flexible photovoltaic support in the utility model;

[0025] Figure 2 It is a schematic diagram of the side segmentation of the large-span, two-end oblique-stayed flexible photovoltaic support in the utility model.

[0026] in:

[0027] 1. Solar photovoltaic power generation components, 2. Component cables, 3. Upper wind-resistant cables, 4. Lower wind-resistant cables, 5. Cross bracing rods, 6. Cross beams, 7. Column components, 8. Horizontal supports, 9. Stay cables. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings:

[0029] like Figure 1~Figure 2A large-span, two-end inclined flexible photovoltaic support is shown, which is used to install photovoltaic modules 1. The photovoltaic support includes: two column modules 7, at least two module cables 2 arranged between the middle sections of the two column modules 7, a cross brace 5 for connecting each module cable 2, an upper wind-resistant cable 3 connected between the top of the column module 7 and the module cable 2, and a lower wind-resistant cable 4 connected between the bottom of the column module 7 and the module cable 2. The module cable 2 is a direct load-bearing member of the solar photovoltaic power generation module, and a plurality of solar photovoltaic power generation modules 1 are arranged above it.

[0030] like Figure 1 and Figure 2 As shown, the upper wind-resistant cable 3 and the lower wind-resistant cable 4 are both located between the two column assemblies. The upper wind-resistant cable 3 and the lower wind-resistant cable 4 can resist the downward deformation caused by the most unfavorable wind pressure of the flexible photovoltaic support structure and the upward deformation caused by the most unfavorable wind suction, and are used to control the wind load effect. The upper wind-resistant cable 3, the lower wind-resistant cable 4, the assembly cable 2 and the cross brace 5 are fixedly connected by a cable clamp node.

[0031] like Figure 2 As shown, the column assembly 7 includes two columns, a crossbeam 6 arranged between the two columns, and a transverse support 8. A crossbeam 6 is connected between the two columns, and both ends of the crossbeam 6 are fixedly connected to the columns 7, and both ends of the crossbeam 6 are respectively connected to the ends of a component cable 2. The two columns 7, the crossbeam 6 and the transverse support 8 form a stable structure, which limits the torsion of the photovoltaic component and enhances the stability of the end support components on both sides. In addition, the two columns are convenient for adjusting the inclination angle of the photovoltaic component set up above the component cable 2, which can be achieved by simply changing the position of the end of the component cable 2. When the area is in strong wind conditions, the flexible photovoltaic bracket can be designed so that the component cable 2 has no inclination angle, that is, the solar photovoltaic power generation component 1 has no tilt angle.

[0032] like Figure 1 and Figure 2As shown, the top and bottom of the column assemblies 7 on both sides are connected with the upper wind-resistant cable 3 and the lower wind-resistant cable 4, respectively. The upper wind-resistant cable 3 is connected to the top of the column assembly 7, and the distance between the top of the column assembly 7 and the crossbeam 6 is 1 / 3 to 1 / 2 of the height of the column assembly 7. The lower wind-resistant cable 4 is connected to the bottom of the column assembly 7 or 1 / 3 to 1 / 2 of the distance from the bottom of the column assembly 7. They are used to resist the load deformation control of wind pressure and wind suction under different wind force levels, and bear the corresponding vertical force component. The horizontal distance between the position where the upper wind-resistant cable 3 and the lower wind-resistant cable 4 are connected to the assembly cable 2 and the column assembly 7 is 1 / 2 to 3 / 2 of the height of the column assembly 7. By adjusting the angle between the wind-resistant cable and the assembly cable 2, the horizontal force component under different wind force levels is borne, and the cable force and cable section of the inclined cable 9 and the assembly cable 2 are reduced. One end of the upper wind-resistant cable 3 and the lower wind-resistant cable 4 is connected to the column assembly 7, and the other end is connected to the assembly cable 2 and the cross brace 5, so that the upper wind-resistant cable 3, the lower wind-resistant cable 4, the assembly cable 2 and the cross brace 5 work together to carry the wind load transmitted by the solar photovoltaic power generation assembly 1. The cross brace 5 is set up to strengthen the connection performance of the node at this part and avoid the torsion of the photovoltaic structure.

[0033] When subjected to vertical downward loads, including the deadweight, snow load and wind pressure load of the solar photovoltaic power generation assembly 1, the assembly cable 2 transfers the load to the upper wind-resistant cable 3, the beam 6 and the column assembly 7; when subjected to upward wind suction loads, the assembly cable 2 transfers the load to the lower wind-resistant cable 4 and the column assemblies 7 on both sides. The upper and lower wind-resistant cables are set to play a reverse pulling role, reducing the cable force of the assembly cable and the inclined cable.

[0034] The column assemblies 7 on both sides are connected to one end of the lower wind-resistant cable 4, and the other end of the lower wind-resistant cable 4 is connected to the connection node of the assembly cable 2 and the cross brace 5. The lower wind-resistant cable 4 is the most unfavorable component of the entire structure to resist wind load. By adjusting the prestress of the lower wind-resistant cable 4 and the connection position with the assembly cable 2, the wind suction effect of the structure can be effectively reduced. The upper wind-resistant cable 3 and the lower wind-resistant cable 4 can be installed and tensioned together with the assembly cable 2 after the main structure is constructed and the assembly is installed, ensuring that the upper wind-resistant cable 3 and the lower wind-resistant cable 4 are in a tensioned state under their own weight.

[0035] like Figure 2As shown, a plurality of inclined cables 9 are arranged on the column assembly 7, and the inclined cables 9 are used to balance the horizontal force transmitted by the component cable 2. The inclined cables 9 are arranged on the opposite sides of the column assembly 7, and the angle between the inclined cables 9 and the ground is in the range of 30°~60°. The length of the inclined cables 9 needs to be determined according to the height of the column assembly 7. The inclined cables are fixed on the anchor piles. The smaller the angle between the inclined cables 9 and the ground, the smaller the cable force of the inclined cables, and the inclined cables need to be set in combination with the site boundary. The column foot of the column is rigidly connected, and the setting of the wind-resistant cable reduces the bending moment at the bottom of the column. According to the preferred embodiment of the utility model, the diameter range of the component cable 2, the upper wind-resistant cable 3, the lower wind-resistant cable 4 and the inclined cables 9 are all 12~25mm, and the material is hot-dip galvanized steel stranded wire with a strength grade of 1770MPa, 1860MPa or 1960MPa.

[0036] The length of the component cable 2 needs to be determined according to the span of the flexible photovoltaic support structure, and the lengths of the upper wind-resistant cable 3 and the lower wind-resistant cable 4 need to be calculated based on wind pressure, site layout, span, earthquake and geological parameters in the specific use area.

[0037] The connection heights of the upper wind-resistant cable 3, the lower wind-resistant cable 4 and the top and bottom of the column assembly 7 of the flexible photovoltaic bracket provided in this embodiment, as well as the horizontal distances between the connection positions of the upper wind-resistant cable 3, the lower wind-resistant cable 4 and the assembly cable 2 and the column assembly 7 are also related to the height of the column assembly 7, which can be adjusted accordingly according to the land use function and should not affect the land use function.

[0038] The flexible support structure provided in this embodiment has good bearing capacity and spanning capacity. The single span along the component cable 2 can reach 10 to 50 meters and has the ability to withstand strong winds. L The determination is based on the load-deformation condition, and the vertical displacement satisfies L / 50, the prestressed state meets L / 150. In summary, the utility model adds oblique upper and lower wind-resistant cables on both sides of the large-span component cables. Under the action of wind pressure, the wind-resistant cables apply oblique upward traction to the component cables supporting the photovoltaic components, so that the component cables generate an upward component force, thereby resisting the tendency of the structure to sink and deform due to its own weight and wind pressure. Under the action of wind suction, the upper and lower wind-resistant cables apply oblique downward traction to the component cables, thereby reducing the vertical upward deformation caused by wind suction, weakening the wind suction effect, and helping to maintain the angle and stability of the photovoltaic components and ensure the safety of the structure. The design of the upper and lower wind-resistant cables reduces the horizontal force of the cables of the traditional single-layer suspension cable flexible photovoltaic support and enhances the site adaptability of the structure, especially in mountainous areas and fish ponds. The utility model improves the spanning capacity of the photovoltaic support structure, reduces the project cost, and is simple to construct compared to the structure of three cables plus struts.

[0039] The installation method of the utility model is:

[0040] (1) Piling on both sides of a pond or other complex terrain, including several anchor piles.

[0041] (2) Install the column assembly 7, beam 6 and lateral support 8.

[0042] (3) Laying several component cables 2.

[0043] (4) Lay a number of cross bracing members 5.

[0044] (5) Install the upper wind-resistant cable 3 and the lower wind-resistant cable 4.

[0045] (6) Install the stay cables 9, and tension the upper wind-resistant cable 3, the lower wind-resistant cable 4 and the component cable 2 respectively through the stay cables at each connection position.

[0046] (7) Install solar photovoltaic power generation components 1.

[0047] (8) The upper wind-resistant cable 3, the lower wind-resistant cable 4 and the component cable 2 are tensioned for a second time to the specified prestressing value.

[0048] (9) Check the tightness of each fastener and complete the installation.

[0049] In summary, compared with the single-layer suspension cable flexible photovoltaic support structure, the utility model adds upper and lower wind-resistant cables on both sides, effectively reducing economic costs and enhancing the effect of resisting wind loads. Compared with the cable truss flexible photovoltaic support structure, it reduces construction complexity and improves construction efficiency.

[0050] The above-described embodiments are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A large-span, two-end inclined flexible photovoltaic support, characterized in that: The photovoltaic bracket includes: two column assemblies (7); At least two component cables (2) are fixed in parallel between the two column components (7) and are used to install the photovoltaic component (1); Upper wind-resistant cables (3), at least two upper wind-resistant cables (3) are fixed on each of the column components (7), one end of each of the upper wind-resistant cables (3) is connected to the top of the column component (7), and the other end is connected to the component cable (2); and lower wind-resistant cables (4), wherein at least two lower wind-resistant cables (4) are fixed on each of the column components (7), one end of each of the lower wind-resistant cables (4) being connected to the component cable (2) and the other end being connected to the bottom of the column component (7).

2. The large-span, two-end inclined flexible photovoltaic support according to claim 1 is characterized in that: The support also includes a cross brace member (5); The cross brace member (5) is used to connect the various component cables (2).

3. According to claim 1, the large-span, two-end inclined flexible photovoltaic support is characterized in that: The column assembly (7) comprises two columns arranged in parallel and a crossbeam (6) arranged between the two columns; The ends of the component cables (2) are fixed on the crossbeam (6).

4. According to claim 3, the large-span, two-end inclined flexible photovoltaic support is characterized in that: The distance between the top end of the column assembly (7) and the crossbeam (6) is 1 / 3 to 1 / 2 of the height of the column assembly (7).

5. The large-span, two-end inclined flexible photovoltaic support according to claim 1 is characterized in that: The horizontal distance between the position where the upper wind-resistant cable (3) is connected to the component cable (2) and the column assembly (7) and the horizontal distance between the position where the lower wind-resistant cable (4) is connected to the component cable (2) and the column assembly (7) are both 1 / 2 to 3 / 2 of the height of the column assembly (7).

6. The large-span, two-end inclined flexible photovoltaic support according to claim 1 is characterized in that: The column assembly (7) is provided with a stay cable (9).

7. The large-span, two-end inclined flexible photovoltaic support according to claim 6 is characterized in that: The inclined cables (9) are respectively arranged at corresponding connection positions of the component cables (2) and the upper and lower wind-resistant cables.

8. The large-span, two-end inclined flexible photovoltaic support according to claim 6 is characterized in that: The component cable (2), the upper wind-resistant cable (3), the lower wind-resistant cable (4) and the inclined cable (9) are all hot-dip galvanized steel strands.

9. The large-span, two-end inclined flexible photovoltaic support according to claim 8 is characterized in that: The diameters of the component cables (2), the upper wind-resistant cables (3), the lower wind-resistant cables (4) and the stay cables (9) are all in the range of 12 to 25 mm.

10. The large-span, two-end inclined flexible photovoltaic support according to claim 3, characterized in that: A transverse support (8) is provided between the upright column and the crossbeam (6).

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