A saddle-shaped cable net flexible photovoltaic system

Abstract

The present invention discloses a saddle-shaped cable net flexible photovoltaic system, comprising a photovoltaic module and a saddle-shaped cable net flexible bracket for supporting the photovoltaic module, the saddle-shaped cable net flexible bracket mainly comprising a peripheral steel frame structure and stabilizing cables and load-bearing cables crisscrossedly arranged in the peripheral steel frame structure for installing the photovoltaic module; the peripheral steel frame structure mainly comprises a parabolic steel beam and a support column arranged at the bottom of the parabolic steel beam, an inclined cable is arranged on the outer wall of the support column, one end of the inclined cable is connected to the support column, and the other end is anchored to the ground; the stabilizing cable is a single longitudinally arranged cable, and the load-bearing cable is a group of two cables arranged in parallel transversely, the photovoltaic module is arranged on the load-bearing cable through the module frame, the stabilizing cable and the load-bearing cable are cross-connected and form a stable saddle-shaped curved surface under the support of the peripheral steel frame structure; the connection between the stabilizing cable and the load-bearing cable is fixed by a node base plate and a U-shaped bolt.

Description

Technical Field

[0001] The invention relates to the field of photovoltaic power generation equipment, and in particular to a saddle-shaped cable net flexible photovoltaic system. Background Art

[0002] Due to the increasing problems of energy depletion and environmental pollution, renewable clean energy, represented by solar energy, has gradually gained attention and promoted the continuous development of global energy transformation. Photovoltaic power generation systems can directly convert solar energy into electrical energy. In engineering, photovoltaic power stations are usually composed of photovoltaic modules, photovoltaic brackets, box transformers and other electrical equipment. Among them, photovoltaic brackets are special brackets used to install photovoltaic modules, mostly using steel structures and aluminum alloy structures. Traditional rigid photovoltaic brackets include components such as inclined beams, purlins, columns, and struts. The installation site is mainly located on the roof of the building and the open ground. The structural foundation generally adopts the form of concrete cast-in-place piles, steel spiral piles and strip foundations. At present, domestic and foreign scholars have conducted research on the design methods, mechanical properties and wind load effects of rigid photovoltaic brackets, and have achieved corresponding results.

[0003] As the available roof resources and high-quality land resources become increasingly scarce, the development of traditional rigid photovoltaic brackets is gradually restricted due to the large area occupied and high requirements for site flatness. In order to expand the spatial adaptability of photovoltaic brackets, a large-span bracket system can be used to erect components in the air. This can not only get rid of the terrain conditions brought by the landing of conventional brackets, but also ensure the continued use of the original site. This large-span bracket also provides a new direction for the future development of the photovoltaic market.

[0004] The flexible prestressed cable structure system is currently the most efficient large-span spatial structure system. It is widely used in large public buildings such as stadiums, exhibition halls and airports because of its typical characteristics of beautiful shape, light form and excellent performance. This structural system uses cables as core components and establishes the overall stiffness of the structure based on the prestress introduced by construction tensioning, so that it can resist the deformation caused by loads and maintain the stability of the structure itself. Therefore, it is possible to consider designing a flexible photovoltaic bracket based on a flexible prestressed cable structure system. Compared with rigid brackets, flexible brackets have the advantages of small steel consumption, small requirements for site foundations, and wide applicability to various complex terrain conditions. At present, the few flexible brackets that have been put into use in engineering are still based on a simple cable structure system, that is, the photovoltaic modules are directly laid on two parallel cables. This type of cable structure has weak out-of-plane stiffness, which makes it difficult to control the vertical deformation of the structure. Especially when it is located in coastal areas and is greatly affected by typhoons, the bracket is prone to violent vibration under the action of wind loads, which causes hidden cracks inside the photovoltaic modules and causes damage. Therefore, the structural design of flexible brackets still needs further improvement. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a saddle-shaped cable net flexible photovoltaic system that can achieve a larger span and stronger stability in view of the above-mentioned defects of the prior art.

[0006] The objective of the present invention is accomplished through the following technical scheme: a saddle-shaped cable net flexible photovoltaic system, mainly comprising a photovoltaic module and a saddle-shaped cable net flexible bracket for supporting the photovoltaic module, the saddle-shaped cable net flexible bracket mainly comprising a peripheral steel frame structure and stabilizing cables and load-bearing cables crisscrossedly arranged in the peripheral steel frame structure for installing the photovoltaic module; the peripheral steel frame structure mainly comprises a parabolic steel beam and a support column arranged at the bottom of the parabolic steel beam, an inclined cable is arranged on the outer wall of the support column, one end of the inclined cable is connected to the support column, and the other end is anchored to the ground; the stabilizing cable is a single longitudinally arranged cable, and the load-bearing cable is a group of two cables arranged in parallel transversely, the photovoltaic module is arranged on the load-bearing cable through the module frame, the stabilizing cable and the load-bearing cable are cross-connected and form a stable saddle-shaped curved surface under the support of the peripheral steel frame structure.

[0007] Furthermore, the cross-connection node of the stabilizing cable and the load-bearing cable is fixed by a node base plate and a U-shaped bolt. An arc groove is provided on the top of the node base plate along the length direction of the load-bearing cable. Mounting holes for installing U-shaped bolts are respectively provided on the two side end faces of the node base plate close to the arc groove. The load-bearing cable is arranged in the arc groove between the two U-shaped bolts. The stabilizing cable is arranged on the upper side of the load-bearing cable to facilitate maintaining the relative position stability. The open side of the U-shaped bolt passes through the mounting holes on the stabilizing cable and the node base plate and is arranged on the node base plate through a double nut.

[0008] Furthermore, a U-shaped clamp is provided at the bottom of the component frame, and the component frame is set on the load-bearing cable through the U-shaped clamp, and the U-shaped clamp includes a U-shaped bolt and a clamp connector arranged on the connecting end surface of the U-shaped bolt and the component frame, and an arc groove for fixing the load-bearing cable is provided at the bottom of the clamp connector.

[0009] Furthermore, the cables of the stabilizing cable and the load-bearing cable are both stainless steel wire ropes, a pressing screw is provided at one end of the cable, and a pressing cable head is provided at the other end of the cable. The cables are connected to each other by a tensioning sleeve provided with an internal thread, and the cables are connected to the parabolic steel beam by an end anchor, and the end anchor includes a double-ear plate and a pin bolt, and the pressed cable head of the cable is hinged to the double-ear plate by the pin bolt.

[0010] Furthermore, the support column includes a V-shaped steel inclined column arranged at the bottom of the longitudinal parabolic steel beam and a vertical steel column arranged at the bottom of the transverse parabolic steel beam.

[0011] Furthermore, the parabolic steel beams, V-shaped steel inclined columns and vertical steel columns are all H-shaped steel or square steel tubes.

[0012] The beneficial technical effect of the present invention is that the photovoltaic system provided by the present invention is based on a saddle-shaped cable net structure, and utilizes the elastic stiffness provided by the component material and the geometric stiffness provided by the cable prestress to jointly resist the deformation caused by external loads, so that it can achieve a larger span and have stronger stability. Each connection node is stable and firm, which can effectively improve the service life of the photovoltaic system and reduce production and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 It is a schematic diagram of the structure of the cross-connection node of the stabilizing cable and the load-bearing cable of the present invention;

[0015] Figure 3 It is a structural schematic diagram of the component frame of the present invention;

[0016] Figure 4 This is a schematic diagram of the structure of the cable pressing screw end of the present invention;

[0017] Figure 5 It is a schematic diagram of the connection structure of the cable head end of the cable compression cable according to the present invention. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to more clearly understand the objectives, technical solutions and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0019] In the description of the present invention, it is necessary to understand that the orientation or position relationship indicated by the terms such as "up", "down", "left", "right", "inside", "outside", "horizontal" and "vertical" is based on the orientation or position relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or original referred to must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] like Figure 1-5As shown, a saddle-shaped cable net flexible photovoltaic system described in the present invention mainly includes a photovoltaic module 1 and a saddle-shaped cable net flexible bracket for supporting the photovoltaic module 1, the saddle-shaped cable net flexible bracket mainly includes a peripheral steel frame structure 2 and stabilizing cables 3 and load-bearing cables 4 crisscrossedly arranged in the peripheral steel frame structure 2 for installing the photovoltaic module 1; the peripheral steel frame structure 2 mainly includes a parabolic steel beam 5 and a support column arranged at the bottom of the parabolic steel beam 5, an inclined cable 6 is arranged on the outer side wall of the support column, and one end of the inclined cable 6 is connected to the support The stabilizing cable 3 is a single longitudinally arranged cable, the load-bearing cable 4 is a group of two transversely parallelly arranged cables, and the photovoltaic module 1 is arranged on the load-bearing cable 4 through the module frame 7. The stabilizing cable 3 and the load-bearing cable 4 are cross-connected and form a stable saddle-shaped surface under the support of the outer steel frame structure 2. The shape and prestress distribution of the cable net are determined by structural form-finding analysis, and the form-finding analysis can adopt the dynamic relaxation method or the force density method.

[0021] Reference Figure 2 As shown, the cross-connection node of the stabilizing cable 3 and the load-bearing cable 4 is fixed by a node base plate 8 and a U-shaped bolt 9. An arc groove is provided on the top of the node base plate 8 along the length direction of the load-bearing cable 4. The node base plate 8 has mounting holes for installing the U-shaped bolts 9 on both side end faces close to the arc groove. The load-bearing cable 4 is arranged in the arc groove between the two U-shaped bolts 9. The stabilizing cable 3 is arranged on the upper side of the load-bearing cable 4 to facilitate maintaining the relative position stability. The open side of the U-shaped bolt 9 passes through the mounting holes on the stabilizing cable 3 and the node base plate 8 and is arranged on the node base plate 8 through a double nut.

[0022] Reference Figure 3 As shown, a U-shaped clamp 10 is provided at the bottom of the component frame 7, and the component frame 7 is set on the load-bearing cable 4 through the U-shaped clamp 10. The U-shaped clamp 10 includes a U-shaped bolt and a clamp connector provided on the connecting end surface of the U-shaped bolt and the component frame. An arc groove for fixing the load-bearing cable is provided at the bottom of the clamp connector. The U-shaped clamp 10 is made of stainless steel, and the component frame 7 is made of aluminum alloy.

[0023] Reference Figure 4-5As shown, the cables of the stabilizing cable 3 and the load-bearing cable 4 are both stainless steel wire ropes, a pressing screw 11 is provided at one end of the cable, and a pressing cable head 12 is provided at the other end of the cable. The pressing screws 11 between the cables are connected by a tensioning sleeve 13 provided with an internal thread. The tensioning sleeve 13 is a round tube with a hole in the middle and reverse internal threads at both ends. The cable is connected to the parabolic steel beam 5 through an end anchor. The end anchor includes a double-ear plate 14 and a pin bolt 15. The pressed cable head 12 of the cable is hinged on the double-ear plate 14 through a pin bolt 16.

[0024] Reference Figure 1 As shown, the support column includes a V-shaped steel inclined column 17 arranged at the bottom of the longitudinal parabolic steel beam 5 and a vertical steel column 18 arranged at the bottom of the transverse parabolic steel beam 5. The parabolic steel beam 5, the V-shaped steel inclined column 17 and the vertical steel column 18 are all H-shaped steel or square steel pipes. The parabolic shape of the steel beam is determined by the span L, the mid-span sag f and the height difference C of the supports at both ends. The parabola horizontal coordinate is x, and the corresponding sagittal height is z, then the parabola equation is:

[0025]

[0026] The specific embodiments described herein are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A saddle-shaped cable net flexible photovoltaic system, characterized in that: The invention mainly comprises a photovoltaic module and a saddle-shaped cable net flexible bracket for supporting the photovoltaic module. The saddle-shaped cable net flexible bracket mainly comprises a peripheral steel frame structure and stabilizing cables and load-bearing cables crisscrossedly arranged in the peripheral steel frame structure for installing the photovoltaic module; the peripheral steel frame structure mainly comprises a parabolic steel beam and a support column arranged at the bottom of the parabolic steel beam, and an inclined cable is arranged on the outer wall of the support column, one end of the inclined cable is connected to the support column, and the other end is anchored to the ground; the stabilizing cable is a single longitudinally arranged cable, and the load-bearing cable is two one- A group of cables are arranged in parallel transversely, the photovoltaic component is arranged on the load-bearing cable through the component frame, the stabilizing cable and the load-bearing cable are cross-connected and form a stable saddle-shaped curved surface under the support of the peripheral steel frame structure; the cross-connection nodes of the stabilizing cable and the load-bearing cable are fixed by a node base plate and a U-shaped bolt, the top of the node base plate is provided with an arc groove along the length direction of the load-bearing cable, and the two side end surfaces of the node base plate close to the arc groove are respectively provided with mounting holes for installing U-shaped bolts, the load-bearing cable is arranged in the arc groove between the two U-shaped bolts, The fixed cable is arranged on the upper side of the load-bearing cable to facilitate maintaining the relative position stability. The open side of the U-shaped bolt passes through the mounting holes on the stabilizing cable and the node base plate and is arranged on the node base plate through a double nut; a U-shaped clamp is arranged at the bottom of the component frame, and the component frame is arranged on the load-bearing cable through the U-shaped clamp, and the U-shaped clamp includes a U-shaped bolt and a clamp connector arranged on the connecting end surface of the U-shaped bolt and the component frame, and an arc groove for fixing the load-bearing cable is arranged at the bottom of the clamp connector; the pulling cables of the stabilizing cable and the load-bearing cable are both stainless steel wire ropes, and the pulling cables are A pressing screw is provided at one end of the cable, and a pressing cable head is provided at the other end of the cable. The cables are connected by a tensioning sleeve provided with an internal thread, and the cable is connected to the parabolic steel beam by an end anchor. The end anchor includes a double-ear plate and a pin bolt, and the pressing cable head of the cable is hinged on the double-ear plate by the pin bolt; the support column includes a V-shaped steel inclined column arranged at the bottom of the longitudinal parabolic steel beam and a vertical steel column arranged at the bottom of the transverse parabolic steel beam; the parabolic steel beam, the V-shaped steel inclined column and the vertical steel column are all H-shaped steel or square steel pipes.

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