Staggered cable truss flexible photovoltaic support system

Abstract

The invention discloses a staggered cable truss flexible photovoltaic support system, the staggered cable truss flexible photovoltaic support system comprises a photovoltaic module and a staggered cable truss flexible support used for supporting the photovoltaic module, the staggered cable truss flexible support comprises an end anchoring system and a staggered double-layer cable system, the end anchoring systems are arranged at the two ends of the double-layer cable system, the double-layer cable system is configured to be used for transverse supporting, and the end anchoring systems are configured to be used for longitudinal supporting. The flexible photovoltaic support system provided by the invention is based on a crossed cable truss structure form, through reasonable arrangement of cable and rod members, the material elastic rigidity of each structural component and the geometric rigidity provided by the prestressed cable are effectively utilized, and a relatively large spatial span is realized without excessive middle supports.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic power generation brackets, and in particular to a staggered cable-truss flexible photovoltaic bracket system. Background Art

[0002] With the acceleration of industrialization and urbanization, human society's energy consumption and demand continue to rise. Problems such as energy crisis, environmental pollution, and abnormal climate change caused by over-reliance on fossil energy are becoming increasingly prominent. The development and utilization of new energy sources that are more low-carbon, environmentally friendly, and sustainable has become a consensus of the international community. As a new energy source, solar energy is widely favored due to its wide distribution, greenness, and safety. Photovoltaic power generation is one of the most effective forms of utilizing solar energy today, and the selection and design of appropriate photovoltaic brackets is also one of the most important links in photovoltaic power generation systems. For traditional rigid photovoltaic brackets, domestic and foreign scholars have conducted extensive research in design schemes, force analysis, wind vibration response, etc., and have achieved certain results, which has promoted the progress of the photovoltaic power generation industry.

[0003] Traditional rigid photovoltaic mounting systems require the initial consideration of suitable, high-quality land. Furthermore, available rooftop resources are relatively limited. Consequently, these systems occupy a large amount of space, lack flexibility in layout, and are relatively uneconomical, hindering the development of the photovoltaic power generation industry. Therefore, the photovoltaic power generation industry urgently needs a large-span photovoltaic mounting system with good spatial adaptability and sustainable utilization of existing sites. This system, which utilizes a large-span mounting system to support photovoltaic modules, eliminates the densely packed columns of traditional rigid photovoltaic mounting systems and allows for the reuse of existing land resources.

[0004] Currently, cable structures are the most efficient long-span spatial structural system. By using prestressed steel strands or wire ropes instead of the purlins used in grid shells, they offer a lightweight, flexible structure with a large span. Existing photovoltaic power generation projects are initially utilizing cable-suspended structures, and flexible photovoltaic racks are emerging. Due to their advantages such as high span capacity, low steel consumption, low site flatness requirements, and high land reuse, they are gradually gaining widespread application in harsh site areas and in fishery-solar hybrid projects, demonstrating their promising development prospects. However, the equilibrium state of the cable-suspended structures currently used in flexible photovoltaic racks is significantly affected by load distribution, making it difficult to control vertical deformation in extreme environments such as typhoons. Furthermore, due to the rack's weak out-of-plane stiffness, flutter and buffeting are prone to occur at unfavorable wind angles, potentially damaging photovoltaic modules. Therefore, developing a structural design that enhances wind resistance while retaining the advantages of flexible racks is of great significance to the advancement of the photovoltaic power generation industry. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a staggered cable-truss flexible photovoltaic support system in order to improve the problems existing in the prior art, which has the advantages of large overall longitudinal stiffness and strong stability, as well as large span and high clearance under the support.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A staggered cable-truss flexible photovoltaic support system includes a photovoltaic module and a staggered cable-truss flexible support for supporting the photovoltaic module. The staggered cable-truss flexible support includes an end anchoring system and a staggered double-layer cable system. The end anchoring system is arranged at both ends of the double-layer cable system. The double-layer cable system is configured for lateral support, and the end anchoring system is configured for longitudinal support.

[0008] Furthermore, the end anchoring system includes a horizontal steel beam, a plurality of herringbone steel frames with short columns and a support column arranged at the bottom of the steel beam, the short column is arranged in the middle of the herringbone steel frame, and two first inclined cables symmetrically arranged along the short column are provided on the outside of the short column, one end of the first inclined cable is connected to the short column, and the other end is anchored to the ground, and a second inclined cable is provided on the outside of the support column, one end of the second inclined cable is connected to the support column, and the other end is consistent with the ground anchoring position of the first inclined cable.

[0009] Furthermore, the double-layer cable system includes an upper load-bearing cable, a lower stabilizing cable, and a connecting rod connecting the upper load-bearing cable and the lower stabilizing cable. The upper load-bearing cable is in the form of a positive curvature parabola formed by a plurality of sections arranged transversely, and its two ends are respectively anchored to the top of the herringbone steel frame of the end anchoring system. The lower stabilizing cable is in the form of a negative curvature parabola formed by a plurality of sections arranged transversely, and its two ends are respectively anchored to the top of the support column of the end anchoring system.

[0010] The upper load-bearing cables and the stabilizing cables are arranged longitudinally and staggered along the end anchoring system, that is, the planar projection of the lower stabilizing cable is located between the two upper load-bearing cables in front and behind, and one end of the connecting rod is connected to the upper load-bearing cable, and the other end is connected to the lower stabilizing cable.

[0011] Furthermore, the photovoltaic components are arranged on the front and rear two upper load-bearing cables through component connection frame clamps, that is, the photovoltaic components are located directly above the lower stabilizing cables, and the double-layer cables form a stable staggered cable-truss flexible photovoltaic support system under the support of the end anchoring system.

[0012] Furthermore, the connecting rod is fixed to the connection node with the upper load-bearing cable and the lower stabilizing cable by means of a cast steel node, a U-shaped rod head clamp and bolts. The cast steel nodes are arranged in pairs. The middle part of the cast steel node is provided with an arc groove along the length direction of the upper load-bearing cable and the lower stabilizing cable. The upper load-bearing cable and the lower stabilizing cable are arranged in the arc groove of the cast steel node. Ear plates are provided on both sides of the cast steel node. The connecting rod is connected to the cast steel node by the cooperation of the U-shaped rod head clamp and the ear plate.

[0013] Furthermore, the component connection frame clamp includes an L-shaped shelf block and an upper adjustment block, and the L-shaped shelf block and the upper adjustment block are fixedly connected to form a clamping space for clamping the photovoltaic component, and the component connection frame clamp is fixed on the long strip cable clamp, and the long strip cable clamp includes an upper bolt seat and a lower clamping part, and an arc-shaped groove is opened in the middle of the lower side of the upper bolt seat along the length direction of the upper load-bearing cable, and an arc-shaped groove is correspondingly opened in the middle of the upper side of the lower clamping part along the length direction of the upper load-bearing cable, and the upper bolt seat and the lower clamping part are fixed by the bolts, so that the upper load-bearing cable is clamped in the arc-shaped groove.

[0014] Furthermore, the upper load-bearing cable and the lower stabilizing cable are connected to the end anchoring system through an end anchor, and the end anchor includes an ear plate and a U-shaped cable head clamp. The U-shaped cable head clamp is connected to the ends of the upper load-bearing cable and the lower stabilizing cable, and is hinged to the ear plate through bolts.

[0015] Furthermore, the support columns are vertical steel columns, and the horizontal steel beams, herringbone steel frames and short columns are all H-shaped steel or square steel tubes.

[0016] The beneficial technical effects of the present invention are:

[0017] (1) The flexible photovoltaic support system provided by the present invention is based on a cross-cable truss structure. By rationally arranging the cables and rod components, the elastic stiffness of the materials of each structural component and the geometric stiffness provided by the prestressed cables are effectively utilized to achieve a larger spatial span without the need for excessive intermediate supports.

[0018] (2) The present invention adopts a cross-cable truss structure, which increases the redundancy and overall stability of the structure, so that it has better anti-deformation and anti-wind vibration performance when subjected to time-varying loads such as wind loads and earthquake loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a structural diagram of the connecting rod and the double-layer cable system connection node of the present invention. The specific node positions are shown in Figure 1 Circled in .

[0021] Figure 3 This is a schematic diagram of the structure of the component connection frame clamp of the present invention. The specific position is shown in Figure 1 Circled in .

[0022] Figure 4 This is a schematic diagram of the connection structure between the cable and the end anchoring system of the present invention. The specific node positions are shown in Figure 1 Circled in . DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to more clearly understand the purpose, technical solutions and advantages of the present invention, the present invention is further explained below in conjunction with the accompanying drawings and implementation examples. In the description of the present invention, it should be understood that the directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", "lateral", "longitudinal", "vertical", "inside", "outside", and "center" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, and therefore should not be understood as limiting the present invention.

[0024] like Figure 1-4 As shown, the staggered cable-truss flexible photovoltaic support system described in the present invention mainly includes a photovoltaic component 1 and a staggered cable-truss flexible support for supporting the photovoltaic component. The staggered cable-truss flexible support mainly includes an end anchoring system 2 and a staggered double-layer cable system 3.

[0025] The end anchoring system 2 mainly includes a horizontal steel beam 4, a plurality of herringbone steel frames 6 with short columns 5 and a support column 7 arranged at the bottom of the steel beam. Two inclined cables 8 are arranged on the outer wall of the short column 5. One end of the inclined cable 8 is connected to the short column 5, and the other end is anchored to the ground. An inclined cable 9 is arranged on the outer wall of the support column 7. One end of the inclined cable 9 is connected to the support column 7, and the other end is consistent with the ground anchoring position of the inclined cable 8 arranged on the short column 5.

[0026] The double-layer cable system 3 mainly includes an upper load-bearing cable 10, a lower stabilizing cable 11 and a connecting rod 12 connecting the upper load-bearing cable 10 and the lower stabilizing cable 11. The upper load-bearing cable 10 is a positive curvature parabola formed by a plurality of sections arranged horizontally, and its two ends are respectively anchored at the top of the "herringbone" steel frame 6 of the end anchoring system 2. The lower stabilizing cable 11 is a negative curvature parabola formed by a plurality of sections arranged horizontally, and its two ends are respectively anchored at the top of the support column 7 of the end anchoring system 2. The upper load-bearing cable 10 and the lower stabilizing cable 11 are arranged in an alternating manner along the longitudinal direction of the end anchoring system 2, that is, the plane projection of the lower stabilizing cable 11 is located between the two upper load-bearing cables 10 in front and behind. One end of the connecting rod 12 is connected to the upper load-bearing cable 10, and the other end is connected to the lower stabilizing cable 11.

[0027] The photovoltaic modules 1 are arranged on the front and rear upper load-bearing cables 10 via module connection frame clamps 13, directly above the lower stabilizing cables 11. The double-layer cable system 3, supported by the end anchoring system 2, forms a stable staggered cable-truss flexible photovoltaic support system. The shape and prestress distribution of the cable-truss are determined by structural form-finding analysis, which can be performed using dynamic relaxation or force density methods.

[0028] Reference Figure 2 As shown, the connection node between the connecting rod 12 and the upper load-bearing cable 10 or the lower stabilizing cable 11 is fixed by a cast steel node 14, a U-shaped rod head clamp 15 and a bolt 16. In this embodiment, the connection between the upper load-bearing cable 10 and the connecting rod 12 is taken as an example. The middle part of the cast steel node 14 is provided with an arc groove along the length direction of the upper load-bearing cable 10, and mounting holes are respectively provided on both side surfaces of the cast steel node 14 close to the arc groove to realize the fixation of the cast steel node 14 to the upper load-bearing cable 10 by the bolt 16. The upper load-bearing cable 10 is arranged in the arc-shaped groove of the cast steel node 14, and ear plates are cast on both sides of the cast steel node 14. The end of the connecting rod 12 is provided with a U-shaped rod head clamp 15. The connecting rod 12 can be connected to the cast steel node 14 through the U-shaped rod head clamp 15, thereby maintaining the relative position stability of the upper load-bearing cable 10 and the lower stabilizing cable 11 arranged in an interlaced manner in the double-layer cable system 3. The open side of the U-shaped rod head clamp 15 is also provided with a mounting hole, and the U-shaped rod head clamp can be fixedly connected to the cast steel node 14 by bolts.

[0029] Reference Figure 3As shown, the component connection frame clamp 13 includes an L-shaped shelf block 17 and an upper adjustment block 18. The L-shaped shelf block 17 and the upper adjustment block 18 can be fastened by the bolts running from top to bottom, so as to clamp the photovoltaic component 1 placed between the two. A through-hole is provided in the middle of the component connection frame clamp 13, and the L-shaped shelf block 17 and the upper adjustment block 18 can be fixed to the long strip cable clamp 19 by the bolts 16. The long strip cable clamp 19 includes an upper bolt seat 20 and a lower clamping portion 21. The middle of the lower side of the bolt seat 20 is along the upper supporting portion. An arc-shaped groove is provided in the length direction of the load-bearing cable 10, and the side on which the photovoltaic module is placed extends outward to form a lateral protrusion. A through hole is provided on the protrusion, and the combination of the L-shaped shelf block 17 and the upper adjustment block 18 can be installed on this protrusion through the through hole by bolts to form a photovoltaic module connection frame. An arc-shaped groove is also provided in the middle of the upper side of the lower clamping part 21 along the length direction of the upper load-bearing cable 10. The bolt seat 20 and the clamping part 21 are fastened by the bolt 16, so that the upper load-bearing cable 10 can be clamped in the arc-shaped groove.

[0030] Reference Figure 4 As shown, the cable (i.e., the upper load-bearing cable 10 or the lower stabilizing cable 11) is connected to the end anchoring system 2 via an end anchor, and the end anchor includes an ear plate 22, the bolt 16 and a U-shaped cable head clamp 23. The U-shaped cable head clamp 23 of the cable is hinged to the ear plate 22 via the bolt 16.

[0031] Reference Figure 1 As shown, the support column 7 is a vertical steel column, and the horizontal steel beam 4, the "herringbone" steel frame 6, and the short column 5 are all H-shaped steel or square steel tubes. The starting height h of the "herringbone" steel frame 6 can be determined based on the preset photovoltaic module inclination angle α. If the starting height h1 of the "herringbone" steel frame at the anchor position of the upper load-bearing cable 10 on the front side of the photovoltaic module 1 is, then the starting height h2 of the "herringbone" steel frame at the anchor position of the upper load-bearing cable 10 on the rear side of the photovoltaic module can be determined by the photovoltaic module inclination angle α and the length L of the module along the end anchoring system 2:

[0032] h2=Lsinα+h1

[0033] Anything not specifically described in the present invention is prior art or can be implemented by prior art. The specific implementation examples described are only illustrative of the principles and effects of the present invention and are not intended to limit the present invention.

Claims

1. A staggered cable-truss flexible photovoltaic support system, characterized by: The invention comprises a photovoltaic assembly and a staggered cable-truss flexible bracket for supporting the photovoltaic assembly, wherein the staggered cable-truss flexible bracket comprises an end anchoring system and a staggered double-layer cable system, wherein the end anchoring system is arranged at both ends of the double-layer cable system, the double-layer cable system is configured for lateral support, and the end anchoring system is configured for longitudinal support.

2. The staggered cable-truss flexible photovoltaic support system according to claim 1, characterized in that: The end anchoring system includes a horizontal steel beam, a plurality of herringbone steel frames with short columns and a support column arranged at the bottom of the steel beam, the short column is arranged in the middle of the herringbone steel frame, and two first inclined cables symmetrically arranged along the short column are provided on the outside of the short column, one end of the first inclined cable is connected to the short column, and the other end is anchored to the ground, and a second inclined cable is provided on the outside of the support column, one end of the second inclined cable is connected to the support column, and the other end is consistent with the ground anchoring position of the first inclined cable.

3. The staggered cable-truss flexible photovoltaic support system according to claim 1, characterized in that: The double-layer cable system includes an upper load-bearing cable, a lower stabilizing cable, and a connecting rod connecting the upper load-bearing cable and the lower stabilizing cable. The upper load-bearing cable is in the form of a positive curvature parabola formed by a plurality of sections arranged transversely, and its two ends are respectively anchored to the top of the herringbone steel frame of the end anchoring system. The lower stabilizing cable is in the form of a negative curvature parabola formed by a plurality of sections arranged transversely, and its two ends are respectively anchored to the top of the support column of the end anchoring system. The upper load-bearing cables and the stabilizing cables are arranged longitudinally and staggered along the end anchoring system, that is, the planar projection of the lower stabilizing cable is located between the two upper load-bearing cables in front and behind, and one end of the connecting rod is connected to the upper load-bearing cable, and the other end is connected to the lower stabilizing cable.

4. The staggered cable-truss flexible photovoltaic support system according to claim 3, characterized in that: The photovoltaic components are arranged on the front and rear two upper load-bearing cables through component connection frame clamps, that is, the photovoltaic components are located directly above the lower stabilizing cables, and the double-layer cables form a stable staggered cable-truss flexible photovoltaic support system under the support of the end anchoring system.

5. The staggered cable-truss flexible photovoltaic support system according to claim 4, characterized in that: The connecting rod is fixed to the connection node between the upper load-bearing cable and the lower stabilizing cable by means of a cast steel node, a U-shaped rod head clamp and bolts. The cast steel nodes are arranged in pairs. The middle part of the cast steel node is provided with an arc groove along the length direction of the upper load-bearing cable and the lower stabilizing cable. The upper load-bearing cable and the lower stabilizing cable are arranged in the arc groove of the cast steel node. Ear plates are provided on both sides of the cast steel node. The connecting rod is connected to the cast steel node by means of the cooperation of the U-shaped rod head clamp and the ear plate.

6. The staggered cable-truss flexible photovoltaic support system according to claim 4, characterized in that: The component connection frame clamp includes an L-shaped shelf block and an upper adjustment block, and the L-shaped shelf block and the upper adjustment block are fixedly connected to form a clamping space for clamping the photovoltaic component. The component connection frame clamp is fixed on the long strip cable clamp, and the long strip cable clamp includes an upper bolt seat and a lower clamping part. An arc-shaped groove is opened in the middle of the lower side of the upper bolt seat along the length direction of the upper load-bearing cable, and an arc-shaped groove is correspondingly opened in the middle of the upper side of the lower clamping part along the length direction of the upper load-bearing cable. The upper bolt seat and the lower clamping part are fixed by the bolts, so that the upper load-bearing cable is clamped in the arc-shaped groove.

7. The staggered cable-truss flexible photovoltaic support system according to claim 6, characterized in that: The upper load-bearing cable and the lower stabilizing cable are connected to the end anchoring system via end anchors, and the end anchors include ear plates and U-shaped cable head clamps. The U-shaped cable head clamps are connected to the ends of the upper load-bearing cable and the lower stabilizing cable, and are hinged to the ear plates via bolts.

8. The staggered cable-truss flexible photovoltaic support system according to claim 2, characterized in that: The support columns are vertical steel columns, and the horizontal steel beams, herringbone steel frames and short columns are all H-shaped steel or square steel pipes.

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