Flexible photovoltaic structure based on cable truss

Abstract

The utility model discloses a flexible photovoltaic structure based on a cable truss. Comprising at least two columns of steel columns and column head cross beams, and the upper ends of the steel columns located in the same column are connected through the column head cross beams; the cable structure comprises at least two inhaul cables, one end of each inhaul cable is fixed on one column head cross beam, the other end of each inhaul cable is fixed on the other column head cross beam, and photovoltaic modules are fixed on the inhaul cables; the supporting structure comprises supporting rods and a ground support, one end of each supporting rod is connected with the corresponding column head cross beam, the other end of each supporting rod is connected with the corresponding ground support, and the ground supports are located between the two columns of steel columns on the outermost side in the at least two columns of steel columns and connected with the column head cross beams at the upper ends of the steel columns on the outermost side through the supporting rods. According to the flexible photovoltaic cable truss structure, the technical problem that the steel consumption of the flexible photovoltaic cable truss structure is large due to the temperature effect in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the field of photovoltaics, and in particular to a flexible photovoltaic structure based on a cable truss. Background Art

[0002] In the related art, a cable truss can be used to support photovoltaic modules. The cable truss is a bracket composed of flexible load-bearing cables, steel columns, steel inclined columns or inclined cables, steel beams and foundations. Its supporting structure is composed of inclined cable steel columns and foundations. In the actual scenario of using flexible photovoltaic structures, since the flexible photovoltaic cable truss structure has a large span and is exposed to the outdoors, the temperature changes greatly. As the temperature changes, the direction of change of the cable and the two ends of the cable truss are not the same. For example, when the temperature drops, the two ends of the cable truss will shorten toward the middle, while the cable will shorten in the direction away from the cable truss. That is, the cable truss and the cable will produce opposite deformations when deformed by temperature, thereby generating a large temperature internal force in the structure. Therefore, in order to ensure the safety of the structure, it is necessary to increase the amount of steel used. That is, there is a technical problem in the related art that the flexible photovoltaic cable truss structure uses a large amount of steel due to the effect of temperature.

[0003] To address the above-mentioned problems, no effective solutions have been proposed so far. Utility Model Content

[0004] The embodiment of the present invention provides a flexible photovoltaic structure based on a cable truss, so as to at least solve the technical problem in the related art that the flexible photovoltaic cable truss structure uses a large amount of steel due to temperature effects.

[0005] An embodiment of the present utility model provides a flexible photovoltaic structure based on a cable truss, comprising: a column-beam structure, the column-beam structure comprising at least two columns of steel columns and column head beams, the upper ends of the steel columns in the same column are connected by the column head beams; a cable structure, the cable structure comprising at least two cables, one end of the cable being fixed to the column head beams of one column, the other end of the cable being fixed to the column head beams of another column, photovoltaic modules being fixed to the cables; a supporting structure, the supporting structure comprising a strut and a ground support, one end of each strut being connected to the column head beams, the other end being connected to the ground support, the ground support being located between the two outermost columns of the at least two columns of steel columns, and being connected to the column head beams at the upper ends of the outermost steel columns through the struts.

[0006] Optionally, one end of the support rod is hingedly connected to the column head beam, and the other end is hingedly connected to the ground support.

[0007] Optionally, the support rod is a concrete-filled circular tube support rod, the cross section of the concrete-filled circular tube support rod is a circular tube, the interior of the concrete-filled circular tube support rod is made of concrete material, and the exterior of the concrete-filled circular tube support rod is made of steel material.

[0008] Optionally, the included angle between the support rod and the plane where the ground support is located is any angle between 30 degrees and 60 degrees.

[0009] Optionally, in the case of temperature changes, the expansion and contraction trend of the struts in the horizontal direction is the same as the expansion and contraction trend of the cable structure in the horizontal direction.

[0010] Optionally, the cable structure includes three cables, wherein the three cables include two first cables respectively connected to two ends of the column head beam, and a second cable connected to the middle position of the column head beam.

[0011] Optionally, the first cable and the second cable are connected to the column head of the steel column.

[0012] Optionally, at least one row of web rod combinations is installed between the first cables and the second cables, and the web rod combination includes a web rod with two ends connected to different first cables, a web rod connecting one first cable and the second cable, and a web rod connecting another first cable and the second cable.

[0013] In an embodiment of the present invention, in addition to the column-beam structure and the cable structure for fixing the photovoltaic modules, the flexible photovoltaic structure further includes a support structure comprising a brace and a ground support. One end of the brace is connected to the column head beam in the column-beam structure, and the other end is connected to the ground support. The ground support is located between the two outermost rows of steel columns of the at least two rows and is connected to the column head beam at the upper end of the outermost steel column through the brace. The brace can support and fix the column-beam structure and the cable structure. When the flexible photovoltaic structure based on the cable truss is affected by temperature and expands and contracts, the expansion and contraction direction of the brace is substantially the same as the expansion and contraction direction of the cable truss (the expansion and contraction trend of the brace in the horizontal direction is the same as the expansion and contraction trend of the cable structure in the horizontal direction). The constraint on the cable truss is greatly reduced, thereby releasing the temperature internal force of the flexible photovoltaic structure based on the cable truss, reducing the amount of steel used in the structure, and thus solving the technical problem in the related art that the flexible photovoltaic cable truss structure uses a large amount of steel due to temperature effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0015] Figure 1 is a schematic diagram of an optional cable truss-based flexible photovoltaic structure according to an embodiment of the present utility model;

[0016] Figure 2 is a three-dimensional schematic diagram of an optional cable truss-based flexible photovoltaic structure according to an embodiment of the present utility model;

[0017] Figure 3 is a schematic diagram of another optional cable truss-based flexible photovoltaic structure according to an embodiment of the present invention;

[0018] Figure 4 is a schematic diagram of another optional cable truss-based flexible photovoltaic structure according to an embodiment of the present utility model;

[0019] Figure 5 is a schematic diagram of another optional cable truss-based flexible photovoltaic structure according to an embodiment of the present utility model;

[0020] Figure 6 is a schematic diagram of another optional cable truss-based flexible photovoltaic structure according to an embodiment of the present utility model;

[0021] Figure 7 This is a schematic diagram of another optional cable truss-based flexible photovoltaic structure according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0024] Figure 1 is a schematic diagram of an optional cable truss-based flexible photovoltaic structure according to an embodiment of the present utility model; Figure 1As shown, the flexible photovoltaic structure based on the cable truss includes: a column-beam structure 1, the column-beam structure 1 includes at least two columns of steel columns 11 and column head beams 12, and the upper ends of the steel columns 11 in the same column are connected by the column head beams 12; a cable structure 2, the cable structure 2 includes at least two cables, one end of the cable is fixed to the column head beam 12 of one column, and the other end of the cable is fixed to the column head beam 12 of another column, and the photovoltaic components 4 are fixed on the cable; a supporting structure 3, the supporting structure 3 includes a strut 31 and a ground support 32, one end of each strut 31 is connected to the column head beam 12, and the other end is connected to the ground support 32, and the ground support 32 is located between the outermost two columns of steel columns 11 in the at least two columns, and is connected to the column head beams at the upper ends of the outermost steel columns through the strut.

[0025] In an optional embodiment, a flexible photovoltaic structure based on a cable truss can be arranged on both sides of a column-beam structure consisting of steel columns 11 and column head beams 12 to place a cable structure 2, and photovoltaic modules 4 can be arranged on the cable structure 2. This allows for a larger span, and the cable structure 2 is lighter than a rigid support, reducing the burden on the column-beam structure and the support structure, and reducing material and construction costs. However, the column-beam structure alone cannot stably fix the cable structure 2, so a support structure 3 is required to support the column-beam structure and the cable structure. The strut 31 can withstand axial pressure, resist the horizontal force of the column-beam structure, and provide support, and the strut 31 is connected to a ground support 32 to fix the strut 31 through the ground support 32.

[0026] In an optional embodiment, the column and beam structure of the cable truss-based flexible photovoltaic structure may include at least two rows of steel columns. When there are multiple rows of steel columns, at least two cables may be arranged between two adjacent rows of steel columns, and the support rods are connected to the column head beams at the upper ends of the two outermost rows of steel columns.

[0027] Figure 2 is a three-dimensional schematic diagram of an optional cable truss-based flexible photovoltaic structure according to an embodiment of the present utility model; Figure 2 As shown, a cable-truss-based flexible photovoltaic structure can include a column-beam structure 1, which includes at least two rows of steel columns 11. The two rows of steel columns 11 can be arranged in different terrains and environmental conditions. The distance between the two rows of steel columns 11 can be adjusted according to the actual environment. By adjusting the distance between the two rows of steel columns 11, a larger span can be achieved. Each row of steel columns contains at least one steel column 11. The upper ends of the steel columns 11 in the same row are connected by a column head beam 12 to form an integrated structure.

[0028] like Figure 2As shown, the flexible photovoltaic structure based on the cable truss also includes a cable structure 2, which includes at least two cables, so that the photovoltaic components 4 are carried by the two cables separated by positions. The number of photovoltaic components can be set according to actual needs and is not limited here.

[0029] like Figure 2 As shown, the flexible photovoltaic structure based on the cable truss also includes a support structure 3, which includes a strut 31. Each steel column 11 can be equipped with one strut 31, or multiple struts 31 can be equipped. The number of struts 31 can be set according to actual conditions. One end of the strut 31 can be connected to the column head beam. Therefore, the number of struts 31 can also be independent of the number of steel columns 11. The struts 31 provided for each row of steel columns 11 are sufficient to achieve support. The other end of the strut 31 needs to be connected to a ground support 32. Each strut 31 needs to be connected to a ground support 32 to transfer the load of the structure to the foundation and provide a stable support point for the structure to prevent the structure from tilting or becoming unstable.

[0030] It should be noted that when the temperature changes, the cable truss may undergo changes in material size, resulting in adjustments to the prestress of the structure. For example, when the temperature drops, the cable structure may shorten toward the middle. When designing a flexible photovoltaic structure based on a cable truss, the stress state and deformation of the cable structure will be considered for analysis to determine a reasonable relationship between structural performance and the amount of steel used. Therefore, when designing the cable truss, the amount of steel used in the structure needs to be increased to consider the influence of temperature internal forces. The flexible photovoltaic structure based on the cable truss in the embodiment of the present application includes a support structure 3, wherein the struts 31 will also expand and contract when the temperature changes, and the direction of expansion and contraction is basically the same as the direction of expansion and contraction of the cable structure (the angle between the expansion and contraction directions is an acute angle), so that the constraints on the expansion and contraction of the cable truss are greatly reduced, thereby releasing the temperature internal forces of the cable truss to reduce the amount of steel used in the design.

[0031] In an embodiment of the present invention, in addition to the column-beam structure and the cable structure for fixing the photovoltaic modules, the flexible photovoltaic structure further includes a support structure comprising a brace and a ground support. One end of the brace is connected to the column head beam in the column-beam structure, and the other end is connected to the ground support. The ground support is located between the two outermost rows of steel columns of the at least two rows and is connected to the column head beam at the upper end of the outermost steel column through the brace. The brace can support and fix the column-beam structure and the cable structure. When the flexible photovoltaic structure based on the cable truss is affected by temperature and expands and contracts, the expansion and contraction direction of the brace is substantially the same as the expansion and contraction direction of the cable truss (the expansion and contraction trend of the brace in the horizontal direction is the same as the expansion and contraction trend of the cable structure in the horizontal direction). The constraint on the cable truss is greatly reduced, thereby releasing the temperature internal force of the flexible photovoltaic structure based on the cable truss, reducing the amount of steel used in the structure, and thus solving the technical problem in the related art that the flexible photovoltaic cable truss structure uses a large amount of steel due to temperature effects.

[0032] In an optional embodiment, one end of the support rod is hingedly connected to the column head beam, and the other end is hingedly connected to the ground support.

[0033] In an optional embodiment, the column base of the steel column can be connected to the ground or the support by a hinge.

[0034] It should be noted that the flexible photovoltaic structure based on the cable truss can be subjected to loads perpendicular to the neutral axis and produce an internal moment effect, that is, it can be subjected to bending moment, which causes the structure to bend or deform and produces large bending stress. When the temperature changes, the steel columns of the column-beam structure may be affected by the bending moment. Therefore, it may be necessary to enlarge the cross-sectional size during design to ensure the safety and functionality of the structure. In an optional embodiment, the support rods of the flexible photovoltaic structure based on the cable truss of the present application are hinged at both ends, and the column base of the steel column is hinged. Hinge can allow relative rotation between components, which can reduce the internal force of the structure. By hinged connection, the bending moment of the structure can be released, thereby reducing the internal force and stress of the steel column. The cross-section of the steel column can be reduced to reduce the amount of steel used.

[0035] In an alternative embodiment, H-shaped steel columns can be used. H-shaped steel columns have high bending, torsional, and shear resistance, making them suitable for structures bearing heavy loads. They can be made of high-strength steel to increase load-bearing capacity and reduce deadweight. Their high load-bearing capacity and low deadweight can also reduce the amount of steel used in the columns.

[0036] Figure 3 is a schematic diagram of another optional flexible photovoltaic structure based on a cable truss according to an embodiment of the present utility model; Figure 3 As shown, the H-shaped steel column can be hinged to the concrete foundation. Figure 3 This is the front view of this part. Figure 4is a schematic diagram of another optional flexible photovoltaic structure based on a cable truss according to an embodiment of the present utility model; Figure 4 As shown, the H-shaped steel column can be hinged to the concrete foundation. Figure 4 This is a side view of the part.

[0037] like Figure 3 and Figure 4 As shown, H-shaped steel column 112 is hingedly connected to concrete foundation 117. Concrete foundation 117 is tightly integrated with the subsurface foundation to provide rigid support. Concrete foundation 117 includes a foundation embedded top plate 118, which is located at the top of concrete foundation 117. Foundation embedded top plate 118 transfers the load of the superstructure to the foundation.

[0038] like Figure 3 and Figure 4 As shown, stiffening ribs 111 are welded to the web of H-shaped steel column 112. These ribs improve the local stability and load-bearing capacity of H-shaped steel column 112, enhancing its rigidity and strength in specific directions and preventing local buckling of the H-shaped steel column web under pressure. An H-shaped steel column base plate 113 is located below H-shaped steel column 112 to transfer the load of H-shaped steel column 112 to concrete foundation 117.

[0039] like Figure 3 and Figure 4 As shown, the H-shaped steel column bottom plate 113 is welded to the strut lug plate 114, and the foundation embedded part top plate 118 is welded to the support lug plate 115. The strut lug plate 114 and the support lug plate 115 are hingedly connected by the pin 116 to achieve a hinged connection between the H-shaped steel column 112 and the concrete foundation 117. The strut lug plate 114 can effectively transfer the load borne by the H-shaped steel column 112 to the pin and increase the stability of the H-shaped steel column 112. The strut lug plate 114 is a double-lug plate that can provide a larger cross-sectional area to bear the load and can provide balanced support in two directions to reduce structural distortion or deformation caused by asymmetric loads. The support lug plate 115 can provide structural support and fixing points. After being hingedly connected by the pin 116, a certain amount of rotation can be allowed between the H-shaped steel column 112 and the concrete foundation 117.

[0040] In an optional embodiment, the strut is a concrete-filled circular tube strut, the cross section of the concrete-filled circular tube strut is a circular tube, the interior of the concrete-filled circular tube strut is made of concrete material, and the exterior of the concrete-filled circular tube strut is made of steel material.

[0041] In an optional embodiment, the angle between the support rod and the plane where the ground support is located is any angle between 30 degrees and 60 degrees.

[0042] In an optional embodiment, under temperature changes, the expansion and contraction tendency of the struts in the horizontal direction is the same as the expansion and contraction tendency of the cable structure in the horizontal direction.

[0043] Figure 5 is a schematic diagram of another optional flexible photovoltaic structure based on a cable truss according to an embodiment of the present utility model; Figure 5 As shown, it may be a front view of the supporting structure, from which the connection relationship between the supporting structure and the column and beam structure can be seen. Figure 6 is a schematic diagram of another optional flexible photovoltaic structure based on a cable truss according to an embodiment of the present utility model; Figure 6 Shown may be a side view of the support structure.

[0044] like Figure 5 and Figure 6 As shown, the brace is a concrete-filled circular tube brace 311. The cross-section of the concrete-filled circular tube brace 311 is a circular tube. The interior of the concrete-filled circular tube brace 311 is made of concrete, while the exterior is made of steel. The steel provides a high-strength outer frame, while the concrete poured inside fills the internal space of the steel tube, jointly bearing the load. The concrete and steel tube in the concrete-filled circular tube brace 311 work together, with the steel tube bearing bending and shear forces, while the concrete bears pressure. This combination of the two improves the brace's load-bearing capacity. Different proportions of concrete aggregate, sand, cement, and water-cement ratio in the concrete-filled circular tube brace 311 will affect the linear expansion coefficient of the concrete in the concrete-filled circular tube brace 311. When preparing the concrete, the linear expansion coefficient of the concrete should be maximized to approximate that of the steel. This ensures that the steel and concrete expand and contract similarly when deformed by temperature. Circular head plates 312 are provided at both ends of the concrete-filled circular tube strut 311 to close the two ends of the concrete-filled circular tube strut 311. The circular head plates 312 are connected to the strut ear plates 313, which can be connected to other structural parts through a pin. The strut ear plate 313 at one end of the column-beam structure is connected to the column head beam 12 through a pin 314. The column head beam 12 includes a stiffening plate 121 and a connecting plate 122. The stiffening plate 121 can increase the local stiffness of the column head beam 12 by providing additional cross-sectional area and increase the torsional resistance of the column head beam 12. The connecting plate 122 provides a connection area for the column head beam 12 to be hinged to the strut ear plate 313 through a pin 314. And the connecting plate 122 can be hinged to the cable structure through a pin 314.

[0045] like Figure 5 and Figure 6As shown, the ground support 32 includes a concrete foundation 321, a foundation top plate 322, and support lugs 323. The concrete foundation 321 provides stability and support for the strut 31. The foundation top plate 322 is located at the top of the concrete foundation 321. This transfers the load of the superstructure to the concrete foundation. The support lugs 323 are hingedly connected to the strut lugs 313 using pins 315. This hinged connection relieves bending moments in the strut.

[0046] In an optional embodiment, the cable structure includes three cables, wherein the three cables include two first cables respectively connected to the two ends of the column head beam, and a second cable connected to the middle position of the column head beam.

[0047] In an optional embodiment, the first and second cables may be connected to the caps of the steel columns.

[0048] In an optional embodiment, at least one row of web rod combinations is installed between the above-mentioned first cables and second cables, and the web rod combination includes a web rod with different first cables connected at both ends, a web rod connecting one first cable and the second cable, and a web rod connecting another first cable and the second cable.

[0049] Figure 7 is a schematic diagram of another optional flexible photovoltaic structure based on a cable truss according to an embodiment of the present utility model; Figure 7 As shown, the cable structure can include two upper cables (upper chords 21) and one lower cable (lower chord 22). The steel column can be an H-shaped steel column 11, with one end of the brace 31 connected to the column head beam 12 and the other end to the ground support. The two upper chords 21 and the one lower chord 22 can be connected by a web 23.

[0050] In an embodiment of the present invention, in addition to the column-beam structure and the cable structure for fixing the photovoltaic modules, the flexible photovoltaic structure further comprises a support structure including a brace and a ground support. One end of the brace is connected to the column head beam of the column-beam structure, and the other end is connected to the ground support. The ground support is located between the two outermost rows of steel columns of the at least two rows and is connected to the column head beam at the upper end of the outermost steel column through the brace. The brace can support and fix the column-beam structure and the cable structure. When the flexible photovoltaic structure based on the cable truss is affected by temperature and expands and contracts, the expansion direction of the brace is substantially the same as the expansion direction of the cable truss (the expansion trend of the brace in the horizontal direction is the same as the expansion trend of the cable structure in the horizontal direction). The constraint on the cable truss is greatly reduced, thereby releasing the temperature internal force of the flexible photovoltaic structure based on the cable truss, reducing the steel consumption of the structure, and thus solving the technical problem of the high steel consumption of the flexible photovoltaic cable truss structure due to temperature in the related art.

[0051] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0052] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts not described in detail in one embodiment, please refer to the relevant description of other embodiments. The above description is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, various improvements and modifications can be made without departing from the principles of the present invention. Such improvements and modifications should also be considered as the scope of protection of the present invention.

Claims

1. A flexible photovoltaic structure based on a cable truss, characterized in that: include: A column-beam structure, comprising at least two rows of steel columns and column head beams, wherein the upper ends of the steel columns in the same row are connected by the column head beams; A cable structure, the cable structure comprising at least two cables, one end of each cable being fixed to the column head beam of one row, the other end of each cable being fixed to the column head beam of another row, and photovoltaic modules being fixed to each cable; A supporting structure comprising a strut and a ground support, wherein one end of each strut is connected to the column head beam and the other end is connected to the ground support, and the ground support is located between the two outermost rows of steel columns in the at least two rows of steel columns, and is connected to the column head beam at the upper end of the outermost steel column through the strut.

2. The flexible photovoltaic structure based on cable trusses according to claim 1, characterized in that: One end of the support rod is hingedly connected to the column head beam, and the other end is hingedly connected to the ground support.

3. The flexible photovoltaic structure based on cable trusses according to claim 2, characterized in that: The support rod is a concrete-filled circular tube support rod, the cross section of the concrete-filled circular tube support rod is a circular tube, the interior of the concrete-filled circular tube support rod is made of concrete material, and the exterior of the concrete-filled circular tube support rod is made of steel material.

4. The cable truss-based flexible photovoltaic structure according to any one of claims 1 to 3, characterized in that: The included angle between the support rod and the plane where the ground support is located is any angle between 30 degrees and 60 degrees.

5. The cable truss-based flexible photovoltaic structure according to claim 4, characterized in that: In the case of temperature changes, the expansion and contraction tendency of the struts in the horizontal direction is the same as the expansion and contraction tendency of the cable structure in the horizontal direction.

6. The cable truss-based flexible photovoltaic structure according to claim 1, characterized in that: The cable structure includes three cables, wherein the three cables include two first cables respectively connected to the two ends of the column head beam, and a second cable connected to the middle position of the column head beam.

7. The cable truss-based flexible photovoltaic structure according to claim 6, characterized in that: The first cable and the second cable are connected to the column head of the steel column.

8. The cable truss-based flexible photovoltaic structure according to claim 6, characterized in that: At least one row of web rod combinations is installed between the first cables and the second cables, and the web rod combination includes a web rod with two ends connected to different first cables, a web rod connecting one first cable and the second cable, and a web rod connecting another first cable and the second cable.

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