Photovoltaic support and photovoltaic system

Abstract

The utility model discloses a photovoltaic support and a photovoltaic system, and belongs to the technical field of photovoltaics. The photovoltaic support comprises an edge supporting structure which comprises an edge stand column and an edge beam pivotally installed on the edge stand column, and the pivot axis of the edge beam is in a first direction; the middle supporting structure comprises a middle stand column and a middle beam installed on the middle stand column in a pivoted mode, the pivoting axis of the middle beam and the mass center of the middle beam are located at different heights, and the pivoting axis of the middle beam is in the first direction; and the assembly cables are mounted on the side beams and the middle beams. According to the photovoltaic support provided by the invention, the pivoting axis of the middle beam and the mass center of the middle beam are arranged at different heights, so that when external disturbances such as a wind load attempt to push the photovoltaic module to generate unexpected rotation, the restoring moment generated by gravity can restrain the torsion and continuous oscillation of the photovoltaic module; and serial damage and disastrous accidents caused by connection failure are reduced, so that the dynamic stability, the wind resistance, the reliability and the safety of the photovoltaic system are improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of photovoltaic technology, and particularly relates to a photovoltaic support and a photovoltaic system. BACKGROUND

[0002] In a flexible photovoltaic system, the installation inclination angle of the related photovoltaic module is set to a fixed angle, which cannot be adjusted according to the changes of external conditions. The photovoltaic module with a fixed inclination angle can keep a good angle with sunlight at a certain moment, such as noon or summer, while the incidence angle of sunlight has a large deviation at most of the time in a day and at most of the seasons in a year, resulting in that a large amount of solar radiation energy cannot be effectively captured, thereby causing a loss of power generation. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to at least solve one of the technical problems in the related art. To this end, the present application provides a photovoltaic support and a photovoltaic system, which can improve the stability of the photovoltaic system.

[0004] In a first aspect, the present application provides a photovoltaic support, comprising:

[0005] an edge support structure comprising an edge upright and an edge beam pivotally mounted to the edge upright, a pivot axis of the edge beam being along a first direction;

[0006] a middle support structure comprising a middle upright and a middle beam pivotally mounted to the middle upright, a pivot axis of the middle beam being at a different height from a center of mass of the middle beam, the pivot axis of the middle beam being along the first direction;

[0007] a module cable mounted to the edge beam and the middle beam.

[0008] According to the photovoltaic support of the present application, by setting the pivot axis of the middle beam at a different height from the center of mass of the middle beam, when an external disturbance such as wind load attempts to push the photovoltaic module to rotate unexpectedly, the restoring moment generated by gravity can inhibit its torsion and continuous oscillation, reduce the chain damage and catastrophic accidents caused by connection failure, thereby improving the dynamic stability, wind resistance, reliability and safety of the photovoltaic system.

[0009] According to an embodiment of the present application, the middle beam comprises:

[0010] a pivot shaft pivotally mounted to the middle upright, the pivot axis of the middle beam coinciding with a center line of the pivot shaft;

[0011] a pair of rods connected to the pivot shaft and located on both sides of the middle upright along the first direction, the module cable being mounted to the pair of rods.

[0012] According to an embodiment of the present application,

[0013] The pair of rods are installed above the rotating shaft, and the assembly cable is installed at the upper end of the pair of rods.

[0014] Or,

[0015] The pair of rods are installed below the rotating shaft, and the assembly cable is installed at the lower end of the pair of rods.

[0016] According to an embodiment of the present application, the middle beam further comprises:

[0017] A connecting rod group comprising a pair of cross-connected connecting rods, both ends of the connecting rods being connected to a pair of rods.

[0018] According to an embodiment of the present application, the middle upright column comprises:

[0019] A middle upright column body;

[0020] A pair of installation pieces spaced apart in a second direction, installed on the middle upright column body, the rotating shaft being pivotally installed between the pair of installation pieces, the first direction and the second direction intersecting.

[0021] According to an embodiment of the present application, the photovoltaic support further comprises:

[0022] A driving device installed on the pair of installation pieces and power-coupled to the middle beam, for driving the middle beam to pivot.

[0023] According to an embodiment of the present application, the middle upright column comprises:

[0024] A middle upright column body;

[0025] A pair of installation pieces spaced apart in a second direction, installed on the middle upright column body;

[0026] A passing cable structure connected to the pair of installation pieces;

[0027] The photovoltaic support further comprises: a counter arch cable connected to the edge support structure and abutting the lower end of the passing cable structure, the counter arch cable extending from top to bottom towards the passing cable structure on both sides in contact with the passing cable structure.

[0028] According to an embodiment of the present application, in height, the center of mass of the middle beam is located between the pivot axis of the middle beam and the assembly cable.

[0029] According to an embodiment of the present application, the photovoltaic support further comprises:

[0030] A bearing cable connected to the edge support structure and the middle beam;

[0031] inter-sling connectors to which the assembly slings and the load bearing slings are connected at locations spaced from the edge support structure or the mid support structure.

[0032] In a second aspect, the present application provides a photovoltaic system, comprising:

[0033] The photovoltaic support according to any one of the above;

[0034] The photovoltaic assembly mounted on the assembly slings of the photovoltaic support.

[0035] According to the photovoltaic system of the present application, by using the above photovoltaic support, the pivot axis of the mid beam and the center of mass of the mid beam are located at different heights, so that when an external disturbance such as wind load attempts to push the photovoltaic assembly to rotate unexpectedly, the restoring moment generated by gravity can suppress its torsion and sustained oscillation, reduce the chain damage and catastrophic accidents caused by connection failure, and thus improve the dynamic stability, wind resistance, reliability and safety of the photovoltaic system.

[0036] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0037] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings, wherein:

[0038] Figure 1 is one of the partial structure schematic diagrams of the photovoltaic support provided by the embodiments of the present application;

[0039] Figure 2 is the second partial structure schematic diagram of the photovoltaic support provided by the embodiments of the present application;

[0040] Figure 3 is one of the structure schematic diagrams of the mid support structure provided by the embodiments of the present application;

[0041] Figure 4 is the second structure schematic diagram of the mid support structure provided by the embodiments of the present application.

[0042] Reference Signs:

[0043] Edge support structure 300;

[0044] Mid support structure 400, mid column 410, mid column body 411, mounting 412, through-sling structure 413, mid beam 420, pivot shaft 421, rod 422, connecting rod group 423, connecting rod 424, pivot axis of the mid beam 425;

[0045] Assembly cable 710, load-bearing cable 720, cable connector 730, counter-arch cable 740. DETAILED DESCRIPTION

[0046] Embodiments of the present application are described below in detail, examples of which are shown in the accompanying drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present application, and cannot be understood as a limitation of the present application.

[0047] Reference is made below to Figures 1-4 A photovoltaic support and a photovoltaic system according to embodiments of the present application are described.

[0048] A photovoltaic system is an engineering system that can efficiently and stably convert solar energy into usable electric energy.

[0049] A photovoltaic system includes a photovoltaic support and a photovoltaic assembly.

[0050] A photovoltaic support is a structural device for fixing and supporting a photovoltaic assembly in a photovoltaic system, which can install the photovoltaic assembly in a relatively optimal angle, safely and stably, on a roof, ground or water surface, etc.

[0051] As shown in Figure 1 and Figure 2 , the photovoltaic support includes an assembly cable 710.

[0052] A photovoltaic assembly is a solid-state physical device that directly converts solar radiation energy into direct-current electric energy.

[0053] The photovoltaic assembly is installed on the assembly cable 710 of the photovoltaic support.

[0054] That is, through the assembly cable 710, the photovoltaic assembly can be stably assembled on the photovoltaic support, and the connection between the photovoltaic assembly and the photovoltaic support is reliable, while the assembly cable 710 has less influence on the light collection and heat dissipation of the photovoltaic assembly.

[0055] Embodiments of the present application also provide a photovoltaic support.

[0056] As shown in Figure 1 , the photovoltaic support includes an edge support structure 300, a middle support structure 400 and an assembly cable 710.

[0057] The edge support structure 300 is a support unit arranged at the end of the photovoltaic system.

[0058] The edge support structure 300 includes an edge column and an edge beam.

[0059] The edge column is a part of the edge support structure 300 fixed to the ground, which is installed on the foundation or base.

[0060] The edge beam is a load-bearing member fixedly installed on the upper portion of the edge post.

[0061] The edge beam is pivotally installed on the edge post, and the pivot axis of the edge beam is along the first direction X.

[0062] That is, the edge beam is installed on the edge post, and can pivot relative to the edge post, and the pivot axis is along the first direction X.

[0063] The middle support structure 400 is a support unit arranged in the middle of the photovoltaic system.

[0064] As shown in Figures 2-4 , the middle support structure 400 includes a middle post 410 and a middle beam 420.

[0065] The middle post 410 is the part of the middle support structure 400 fixed to the ground, installed on the foundation or base.

[0066] The middle beam 420 is a load-bearing member fixedly installed on the upper portion of the middle post 410.

[0067] The middle beam 420 is pivotally installed on the middle post 410, and the pivot axis 425 of the middle beam is along the first direction X.

[0068] As shown in Figures 2-4 , that is, the middle beam 420 is installed on the middle post 410, and can pivot relative to the middle post 410, and the pivot axis is along the first direction X.

[0069] In other words, the pivot axis 425 of the middle beam is in the same direction as the pivot axis of the edge beam.

[0070] The assembly cable 710 is a high-strength flexible or semi-flexible load-bearing member, which can be a steel strand or a steel wire rope, etc.

[0071] As shown in Figures 2-4 , the assembly cable 710 is installed on the edge beam and the middle beam 420.

[0072] The end of the assembly cable 710 can be anchored to the edge beam, and the middle of the assembly cable 710 can be fixedly connected with the middle beam 420. The connection point of the assembly cable 710 with the edge beam can be at the same height as the connection point of the assembly cable 710 with the middle beam 420. When the edge beam or the middle beam 420 is driven to pivot, the assembly cable 710 connected to the edge beam and the middle beam 420 can pivot accordingly.

[0073] The assembly cable 710 is used to install photovoltaic modules of the photovoltaic system.

[0074] In this way, when the edge beam or the middle beam 420 is driven to pivot, the assembly cable 710 connected to the edge beam and the middle beam 420 can pivot accordingly, and the pivot of the assembly cable 710 can drive the photovoltaic modules installed on the assembly cable 710 to pivot, thereby changing the inclination angle of the photovoltaic modules.

[0075] Compared with the related fixed-tilt photovoltaic modules, the embodiments can make the tilt angle of the photovoltaic module more accurately align with the sunlight in different seasons or at different times of the day. For example, the tilt angle of the photovoltaic module is adjusted to be larger in winter to capture the lower sunlight, and the tilt angle of the photovoltaic module is adjusted to be smaller in summer to adapt to the high-angle sunlight. In this way, the sunlight can be incident at a more vertical angle, reducing the loss of light reflection, thereby increasing the light energy absorption per unit area of the photovoltaic module and improving the power generation output of the photovoltaic system.

[0076] In addition, in the snow area, the tilt angle of the photovoltaic module can be adjusted to a larger value to help the snow slide off, reducing the power generation loss and maintenance cost. In the dusty area, the surface can be self-cleaned more effectively by adjusting the angle of the photovoltaic module and using rainfall.

[0077] In the related art, some tracking flexible photovoltaic supports are also designed, but due to the relatively higher instability of the flexible photovoltaic support, these tracking flexible photovoltaic supports cannot be actually implemented. For example, when encountering a continuously changing wind load, the photovoltaic module on the tracking flexible photovoltaic support is prone to irregular torsion and angular jitter. Such jitter can reduce the accuracy of solar tracking, directly leading to a decrease in power generation. In the case of extreme wind conditions, the photovoltaic module can rotate out of control to the mechanical limit position, causing structural damage.

[0078] The technical solution of the present application, as shown in Figures 2-4 The pivot axis 425 of the middle beam is at a different height from the center of mass of the middle beam 420.

[0079] Among them, the height of the pivot axis 425 of the middle beam and the height of the center of mass of the middle beam 420 can be one of the following situations:

[0080] First, as shown in Figure 4 The pivot axis 425 of the middle beam is higher in height than the center of mass of the middle beam 420.

[0081] In this embodiment, the central beam 420 can form a system similar to a "pendulum". The stable equilibrium point of the central beam 420, that is, the lowest point of the gravitational potential energy of the central beam 420, is located directly below the pivot axis of the central beam 420's center of mass. When the central beam 420 deviates from this equilibrium point due to external disturbances, such as gusts of wind, gravity acts on the eccentric center of mass, generating a restoring torque around the pivot axis. The direction of this gravitational torque is opposite to the direction of the disturbance, and its magnitude is proportional to the vertical eccentricity of the center of mass and the angle of disturbance. When external disturbances such as wind loads attempt to push the central beam 420 to rotate unexpectedly, gravity will generate a restoring torque opposite to the direction of rotation, attempting to pull the center of mass back to its lowest equilibrium position. A small offset can trigger a small restoring force to pull it back, while a larger offset will trigger a stronger restoring force to resist it, thereby improving the dynamic stability of the photovoltaic system in the wind and reducing the risk of deformation or damage to the photovoltaic system.

[0082] The lift or pressure generated by wind loads acting on the surface of photovoltaic modules can be converted into torsional moments, causing continuous vibration or low-frequency oscillations in the structure. This continuous vibration affects the tracking accuracy of the photovoltaic modules and may generate alternating stress at structural connection points, accelerating structural fatigue of the module cable 710, edge support structure 300, and central support structure 400, thus shortening their lifespan. In this embodiment, the gravity restoring moment can increase the equivalent torsional stiffness of the photovoltaic system, suppressing continuous vibration or low-frequency oscillations in the structure, thereby effectively reducing wind-induced vibration and the resulting fatigue damage.

[0083] Secondly, such as Figure 3 As shown, the pivot axis 425 of the middle beam is lower in height than the center of mass of the middle beam 420.

[0084] In this embodiment, most of the structural mass of the central beam 420 is located above the pivot axis 425 of the central beam, and the installation position of the component cable 710 at the central beam 420 is also located above the pivot axis 425 of the central beam. Compared with the "bottom-hanging" installation, this embodiment can adopt the "top-hanging" installation. When some mechanical connection points fail unexpectedly, the presence of a structure below the installation position can reduce the risk of the photovoltaic system suddenly falling to the ground under gravity, reducing the chain reaction damage and catastrophic accidents caused by connection failure, such as the photovoltaic module breaking and the momentum damage caused by the falling of the central support structure 400. It also reduces the safety risks to personnel or equipment below, helping to protect the stability of the photovoltaic system.

[0085] According to the photovoltaic support provided by the embodiment of the present application, the pivot axis 425 of the middle beam and the centroid of the middle beam 420 are located at different heights, so that when an external disturbance such as wind load attempts to push the photovoltaic module to rotate unexpectedly, the restoring moment generated by gravity can inhibit the torsion and sustained oscillation, reduce the chain damage and catastrophic accidents caused by connection failure, and thus improve the dynamic stability, wind resistance, reliability and safety of the photovoltaic system.

[0086] Correspondingly, according to the photovoltaic system provided by the embodiment of the present application, the above photovoltaic support is adopted, the pivot axis 425 of the middle beam and the centroid of the middle beam 420 are located at different heights, so that when an external disturbance such as wind load attempts to push the photovoltaic module to rotate unexpectedly, the restoring moment generated by gravity can inhibit the torsion and sustained oscillation, reduce the chain damage and catastrophic accidents caused by connection failure, and thus improve the dynamic stability, wind resistance, reliability and safety of the photovoltaic system.

[0087] In some embodiments, as shown in Figure 3 and Figure 4 , the middle beam 420 includes a pivot shaft 421 and a rod 422.

[0088] The pivot shaft 421 is a rigid shaft, which can be cylindrical or polygonal columnar.

[0089] As shown in Figure 3 and Figure 4 , the pivot shaft 421 is pivotally installed on the middle upright 410.

[0090] That is, the pivot shaft 421 is installed on the middle upright 410 and can pivot relative to the middle upright 410.

[0091] As shown in Figure 3 and Figure 4 , the pivot axis 425 of the middle beam coincides with the center line of the pivot shaft 421.

[0092] The center line of the pivot shaft 421 is the geometric center line inherent to the pivot shaft 421. For a cylindrical pivot shaft 421, its geometric center line is a straight line passing through the centers of its two end faces. For a polygonal columnar pivot shaft 421, such as a square column or a hexagonal column, its geometric center line is a straight line passing through the geometric centers of its two end faces.

[0093] The entire middle beam 420 includes the pivot shaft 421 and the rod 422, and the assembly cable 710 and the photovoltaic module carried by the middle beam 420, and the axis around which the rotation occurs coincides with the geometric center line of the pivot shaft 421.

[0094] The rod 422 is a rigid beam structural component, which can be a C-shaped steel or a square tube.

[0095] As shown in Figure 3 and Figure 4As shown, the pair of bars 422 are arranged symmetrically on both sides of the central column 410 along the first direction X. The symmetric arrangement makes the force and torque transmitted from the central column 410 to both sides along the first direction X balanced, reducing the torque generated by the asymmetric arrangement of the bars 422.

[0096] As shown, the pair of bars 422 are arranged symmetrically on both sides of the central column 410 along the first direction X. The symmetric arrangement makes the force and torque transmitted from the central column 410 to both sides along the first direction X balanced, reducing the torque generated by the asymmetric arrangement of the bars 422.

[0097] As shown, the pair of bars 422 are arranged symmetrically on both sides of the central column 410 along the first direction X. The symmetric arrangement makes the force and torque transmitted from the central column 410 to both sides along the first direction X balanced, reducing the torque generated by the asymmetric arrangement of the bars 422. Figure 3 Figure 4 As shown, the pair of bars 422 are connected to the rotating shaft 421.

[0098] That is, the pair of bars 422 are fixedly connected to the rotating shaft 421, for example by welding or flange connection, and can rotate synchronously with the rotating shaft 421.

[0099] As shown, the assembly cable 710 is installed on the pair of bars 422. Figure 2

[0100] The assembly cable 710 can extend along the first direction X as a whole, and the connection points of the assembly cable 710 to the middle support structure 400 can include two, which are respectively located on the pair of bars 422 arranged at intervals along the first direction X.

[0101] The weight and wind pressure of the photovoltaic module can be transmitted to the bars 422 through the assembly cable 710.

[0102] When the rotating shaft 421 is driven to pivot, the rotating shaft 421 drives the bars 422 to pivot, the bars 422 drive the assembly cable 710 to pivot, and finally all the photovoltaic modules installed on the assembly cable 710 change the inclination angle synchronously, completing the tracking action.

[0103] In some embodiments, the installation position of the bars 422 and the assembly cable 710 can be at least one of the following cases:

[0104] As shown, the pair of bars 422 are arranged symmetrically on both sides of the central column 410 along the first direction X. The symmetric arrangement makes the force and torque transmitted from the central column 410 to both sides along the first direction X balanced, reducing the torque generated by the asymmetric arrangement of the bars 422. Figure 2

[0105] ​​​In this embodiment, the rotating part of the photovoltaic system includes a rod 422, a module cable 710, and a photovoltaic module, with its center of mass naturally located above the pivot axis. Compared to a "bottom-hanging" installation, this embodiment allows for a "top-hanging" installation of the rod 422 and the module cable 710. If some mechanical connection points of the rod 422 or the module cable 710 unexpectedly fail, the presence of a structure below the installation location reduces the risk of the photovoltaic system components suddenly falling to the ground under gravity. This reduces the risk of chain reactions and catastrophic accidents caused by connection failures, such as the photovoltaic module breaking or the momentum damage caused by the falling of the central support structure 400. It also reduces safety risks to personnel or equipment below, helping to protect the stability of the photovoltaic system.

[0106] Meanwhile, the photovoltaic modules are installed on the upper part of the pole 422 via the module cable 710. The overall installation position of the photovoltaic modules is higher, which can effectively reduce the impact of ground crops blocking the light and low-altitude dust accumulation on the module's light-gathering and improve the solar energy absorption efficiency of the photovoltaic modules.

[0107] Secondly, such as Figure 4 As shown, a pair of rods 422 are installed below the pivot 421, and the component cable 710 is installed at the lower end of the pair of rods 422.

[0108] In this embodiment, the central beam 420, the component cable 710, and the photovoltaic module can form a system similar to a "pendulum." The stable equilibrium point of the central beam 420, that is, the lowest point of gravitational potential energy of the central beam 420, component cable 710, and photovoltaic module, is located directly below its center of mass, opposite to the pivot axis. When the photovoltaic module deviates from this equilibrium point due to external disturbances, such as gusts of wind, gravity acts on the center of mass deviating from the pivot axis, generating a restoring torque around the pivot axis. The direction of this gravitational torque is opposite to the direction of the disturbance, and its magnitude is proportional to the vertical eccentricity of the center of mass and the angle of disturbance. When external disturbances such as wind loads attempt to push the photovoltaic module to rotate unexpectedly, gravity will generate a restoring torque opposite to the direction of rotation, attempting to pull the center of mass back to its lowest equilibrium position. A small offset can trigger a small restoring force to pull it back, while a larger offset will trigger a stronger restoring force to resist it, thereby improving the dynamic stability of the photovoltaic system in the wind and reducing the risk of deformation or damage to the photovoltaic system.

[0109] The lift or pressure generated by wind loads acting on the surface of photovoltaic modules can be converted into torsional moments, causing continuous vibration or low-frequency oscillations in the structure. This continuous vibration affects the tracking accuracy of the photovoltaic modules and may generate alternating stress at structural connection points, accelerating structural fatigue of the module cable 710, edge support structure 300, and central support structure 400, thus shortening their lifespan. In this embodiment, the gravity restoring moment can increase the equivalent torsional stiffness of the photovoltaic system, suppressing continuous vibration or low-frequency oscillations in the structure, thereby effectively reducing wind-induced vibration and the resulting fatigue damage.

[0110] In practical applications, the mounting positions of the rods 422 and the assembly cables 710 can be selected according to requirements.

[0111] In some embodiments, as shown in Figure 3 and Figure 4 , the middle beam 420 comprises a connecting rod group 423.

[0112] The connecting rod group 423 is a structural reinforcing component of the middle beam 420 of the photovoltaic support.

[0113] As shown in Figure 3 and Figure 4 , the connecting rod group 423 comprises a pair of connecting rods 424, which are cross-connected.

[0114] The connecting rod 424 is a rigid rod-shaped component, which can be made of aluminum alloy or steel, etc.

[0115] The two connecting rods 424 can not be arranged in parallel, but in a cross form, similar to an “X” shape, and connected to each other, such as by threaded connection or welding, etc. This cross connection can improve the stability and anti-deformation ability of the connection.

[0116] As shown in Figure 3 and Figure 4 , the two ends of the connecting rod 424 are respectively connected to a pair of rods 422.

[0117] That is, the two ends of one connecting rod 424 are respectively connected to a pair of rods 422, and the two ends of the other connecting rod 424 are also respectively connected to a pair of rods 422, and the pair of connecting rod groups 423 are cross-connected to each other. The connecting rod group 423 can connect the originally relatively independent pair of rods 422 into a whole, forming a relatively stable force-bearing structure, helping the pair of rods 422 to realize cooperative force-bearing and reducing the risk of independent deformation of a single rod 422 under the action of load.

[0118] In some embodiments, as shown in Figure 3 , the middle column 410 comprises a middle column body 411 and a mounting member 412.

[0119] The middle column body 411 is the core load-bearing structural member of the middle column 410, which can be a vertically extending rigid member. The material of the middle column body 411 can be steel or aluminum alloy, etc., and the form of the middle column body 411 can be a square tube or a round tube, etc.

[0120] The mounting member 412 is a component adapted for mounting of the middle column 410.

[0121] As shown in Figure 3 , the mounting member 412 comprises a pair of mounting members 412 arranged at intervals along the second direction Y, and the first direction X and the second direction Y intersect.

[0122] A gap along the second direction Y is left between the pair of mountings 412, which can reserve space for mounting components such as the rotating shaft 421.

[0123] As shown in Figure 3 , the pair of mountings 412 are mounted on the center pillar body 411.

[0124] The pair of mountings 412 can be mounted on the top end or other positions of the center pillar body 411 by means of threaded connection or welding, etc., and the mounting method can bear a certain strength.

[0125] As shown in Figure 3 , the rotating shaft 421 is pivotally mounted between the pair of mountings 412.

[0126] The rotating shaft 421 is at least partially located between the pair of mountings 412, and the rotating shaft 421 and the pair of mountings 412 can not be fixedly connected, and the rotating shaft 421 can rotate around the pivot axis.

[0127] In some embodiments, the photovoltaic support includes a driving device.

[0128] The driving device is a device capable of generating active driving force. The driving device includes a power source and a transmission member. The power source can be a motor, a hydraulic pump, an air compressor, or a hand crank mechanism, etc. The transmission member can be a rotary reducer, a gear set, a worm and worm wheel, or a lead screw and nut, etc.

[0129] The driving device is mounted on the pair of mountings 412.

[0130] For example, the inner side of the pair of mountings 412 opposite to each other is provided with a bayonet slot matching the shape of the driving device, and the size of the bayonet slot is adapted to the outline of the mounting part of the driving device. The bayonet slot can be provided with an elastic buckle for instant fixation after the driving device is clamped; or the bayonet slot can be provided with a limiting protrusion to limit the displacement of the driving device; or the bayonet slot can be provided with a locking pin hole, which can be matched with a pin to realize secondary reinforcement and improve the anti-vibration performance of the structure.

[0131] Of course, the installation of the driving device and the pair of mountings 412 can also be realized by means of threaded connection or flange butt joint, etc.

[0132] The driving device is power-coupled with the middle beam 420 for driving the middle beam 420 to pivot.

[0133] The power source of the driving device transmits power to the transmission member of the driving device, and the output end of the transmission member is power-coupled with the rotating shaft 421. In this way, the power generated by the driving device can be transmitted to the rotating shaft 421 to drive the rotating shaft 421 to pivot.

[0134] Meanwhile, the driving device can also provide the torsion resistance for the middle beam 420 with a fixed angle, so that the middle beam 420 can maintain sufficient load bearing capacity and lateral force resistance at the specific inclination angle, and reduce the wind-induced vibration of the middle beam 420, the assembly cable 710 and the photovoltaic assembly.

[0135] In some embodiments, as shown in Figure 3 The central column 410 includes a central column body 411, a mounting member 412 and a cable passing structure 413.

[0136] The central column body 411 is the core load bearing structure of the central column 410, which can be a vertically extending rigid member. The material of the central column body 411 can be steel or aluminum alloy, etc., and the shape of the central column body 411 can be a square tube or a round tube, etc.

[0137] The mounting member 412 is a component of the central column 410 which is adapted to be mounted.

[0138] As shown in Figure 3 The mounting member 412 includes a pair of members which are spaced apart along the second direction Y, and the first direction X and the second direction Y are intersected.

[0139] The pair of mounting members 412 leaves a gap along the second direction Y, which can reserve space for the installation of the rotating shaft 421 and other components.

[0140] As shown in Figure 3 The pair of mounting members 412 is mounted on the central column body 411.

[0141] The pair of mounting members 412 can be mounted on the top end or other positions of the central column body 411 by screwing or welding, etc., and the mounting method can bear a certain strength.

[0142] The cable passing structure 413 is a rigid member, and the material can be steel or aluminum alloy, etc.

[0143] As shown in Figure 1 The cable passing structure 413 is connected to the pair of mounting members 412.

[0144] The cable passing structure 413 can be fixed on the pair of mounting members 412 by screwing or welding, etc. The cable passing structure 413 can be located on the inner side of the pair of mounting members 412, and the installation position of the cable passing structure 413 can be lower than the installation position of the driving device.

[0145] As shown in Figure 2 and Figure 1 The photovoltaic support includes a counter arch cable 740.

[0146] The counter arch cable 740 is a high-strength flexible or semi-flexible load bearing member, and the counter arch cable 740 can be a steel strand or a steel wire rope, etc.

[0147] AsFigure 2 and Figure 2 As shown in FIG. 7, the counter arch cable 740 is connected to the edge support structure 300 and abuts the lower end of the overpass cable structure 413.

[0148] The counter arch cable 740 can be anchored to the edge support structure 300, such as an edge column or an edge beam. The lower end of the overpass cable structure 413 can be designed with a smooth angle, such as a circular arc or a streamline shape, to reduce the damage of the overpass cable structure 413 to the counter arch cable 740 and to protect the counter arch cable 740 to some extent.

[0149] As shown in FIG. 7, the counter arch cable 740 extends from top to bottom towards the overpass cable structure 413 on both sides in contact with the overpass cable structure 413. Figure 2

[0150] That is, when the counter arch cable 740 passes through the overpass cable structure 413, the counter arch cable 740 presents a "V" shape near the overpass cable structure 413. Therefore, the counter arch cable 740 naturally forms an upward arching tension after being tensioned, thereby generating a continuous upward abutting force on the overpass cable structure 413. Through this design, the tension of the counter arch cable 740 can be converted into a reverse support load on the middle beam 420, which to some extent offsets the downward pressure or bending moment on the middle beam 420 generated by the self-weight of the photovoltaic module, accumulated snow, wind load, etc., reduces the deformation risk of the middle beam 420, and improves the overall deflection resistance and fatigue resistance of the photovoltaic support.

[0151] In some embodiments, the centroid of the middle beam 420 is located between the pivot axis 425 of the middle beam and the module cable 710.

[0152] Among them, the height of the centroid of the middle beam 420, the pivot axis 425 of the middle beam and the module cable 710 can be one of the following situations:

[0153] First, the height of the pivot axis 425 of the middle beam is higher than the height of the centroid of the middle beam 420, and the height of the centroid of the middle beam 420 is higher than the height of the module cable 710.

[0154] ​In this embodiment, the central beam 420, the component cable 710, and the photovoltaic module can form a pendulum-like system. The stable equilibrium point of the central beam 420, component cable 710, and photovoltaic module, i.e., the lowest point of their gravitational potential energy, is located directly below their center of mass, opposite to the pivot axis. When the central beam 420, component cable 710, and photovoltaic module deviate from this equilibrium point due to external disturbances, such as gusts of wind, gravity acts on the eccentric center of mass, generating a restoring torque around the pivot axis. The direction of this gravitational torque is opposite to the direction of the disturbance, and its magnitude is proportional to the vertical eccentricity of the center of mass and the angle of the disturbance. When external disturbances such as wind loads attempt to push the photovoltaic module to rotate unexpectedly, gravity will generate a restoring torque opposite to the direction of rotation, attempting to pull the center of mass back to its lowest equilibrium position. A small offset can trigger a small restoring force to pull it back, while a larger offset will trigger a stronger restoring force to resist it, thereby improving the dynamic stability of the photovoltaic system in the wind and reducing the risk of deformation or damage to the photovoltaic system.

[0155] The lift or pressure generated by wind loads acting on the surface of photovoltaic modules can be converted into torsional moments, causing continuous vibration or low-frequency oscillations in the structure. This continuous vibration affects the tracking accuracy of the photovoltaic modules and may generate alternating stress at structural connection points, accelerating structural fatigue of the module cable 710, edge support structure 300, and central support structure 400, thus shortening their lifespan. In this embodiment, the gravity restoring moment can increase the equivalent torsional stiffness of the photovoltaic system, suppressing continuous vibration or low-frequency oscillations in the structure, thereby effectively reducing wind-induced vibration and the resulting fatigue damage.

[0156] Secondly, such as Figure 1 As shown, the height of component cable 710 is higher than the height of the center of mass of the middle beam 420, and the height of the center of mass of the middle beam 420 is higher than the height of the pivot axis 425 of the middle beam.

[0157] In this embodiment, most of the structural mass of the central beam 420 is located above the pivot axis 425 of the central beam, and the installation position of the component cable 710 at the central beam 420 is also located above the pivot axis 425 of the central beam. Compared with the "bottom-hanging" installation, this embodiment can adopt the "top-hanging" installation. When some mechanical connection points fail unexpectedly, the presence of a structure below the installation position can reduce the risk of the photovoltaic module suddenly falling to the ground under gravity, reducing the chain reaction damage and catastrophic accidents caused by connection failure, such as the photovoltaic module breaking and the momentum damage caused by the falling of the central support structure 400. It also reduces the safety risks to personnel or equipment below, helping to protect the stability of the photovoltaic system.

[0158] In practical applications, the center of gravity of the middle beam 420, the pivot axis 425 of the middle beam, and the height position of the component cable 710 can be selected according to requirements.

[0159] In some embodiments, as shown in Figure 2 and Figure 1 The PV support structure includes a load-bearing cable 720.

[0160] The load-bearing cable 720 is a high-strength flexible or semi-flexible load-bearing member, which can be a steel strand or a steel wire rope, etc.

[0161] As shown in Figure 2 and Figure 1 The load-bearing cable 720 is connected to the edge support structure 300 and the mid-beam 420.

[0162] That is, the end of the load-bearing cable 720 is anchored to the edge support structure 300, and the middle of the load-bearing cable 720 is installed on the mid-beam 420, and the edge support structure 300 and the mid-beam 420 can transmit the force from the load-bearing cable 720 to the foundation.

[0163] The inter-cable connector 730 is a rigid constraint member.

[0164] As shown in Figures 1-4 The assembly cable 710 and the load-bearing cable 720 are connected to the inter-cable connector 730 at a position spaced from the edge support structure 300 or the mid-beam 420.

[0165] That is, between two adjacent support structures, the upper assembly cable 710 and the lower load-bearing cable 720 are connected together by the inter-cable connector 730.

[0166] The inter-cable connector 730 can include a plurality of rods, and the assembly method includes split mounting and integral mounting. The split mounting process is that each rod is first connected to the corresponding position of the assembly cable 710 and / or the load-bearing cable 720, and then connected to each other to form a complete inter-cable connector 730. The integral mounting process is that all rods are pre-assembled into a complete inter-cable connector 730, and then the inter-cable connector 730 is connected to the upper assembly cable 710 and the lower load-bearing cable 720.

[0167] The load-bearing cable 720 and the inter-cable connector 730 can help to bear the vertical and lateral forces such as the self-weight of the PV assembly, snow, wind load, etc., reduce the local stress or bending deformation of the edge support structure 300 or the mid-beam 420 caused by load concentration, reduce wind-induced vibration, and help to protect the stability of the PV system.

[0168] The PV support structure of the embodiments of the present application will be described below with reference to ​ .

[0169] The PV support structure includes an edge support structure 300, a mid-beam 420, an assembly cable 710, a driving device, an anti-cable 740, a load-bearing cable 720, and an inter-cable connector 730.

[0170] The edge support structure 300 comprises edge uprights and an edge beam. The edge beam is pivotally mounted to the edge uprights, and the pivot axis of the edge beam is along the first direction X.

[0171] The middle support structure 400 comprises middle uprights 410 and a middle beam 420. The middle beam 420 is pivotally mounted to the middle uprights 410, and the pivot axis 425 of the middle beam is at different heights from the center of mass of the middle beam 420, and the pivot axis 425 of the middle beam is along the first direction X. The middle upright 410 comprises a middle upright body 411, a mounting 412, and a passing cable structure 413. The mounting 412 comprises a pair of mountings 412 spaced apart along the second direction Y, and a rotating shaft 421 is pivotally mounted between the pair of mountings 412, and the first direction X and the second direction Y intersect. The passing cable structure 413 is connected to the pair of mountings 412. The middle beam 420 comprises the rotating shaft 421, a rod 422, and a connecting rod group 423. The rotating shaft 421 is pivotally mounted to the middle upright 410, and the pivot axis 425 of the middle beam coincides with the center line of the rotating shaft 421. The rod 422 comprises a pair of rods 422 located on both sides of the middle upright 410 along the first direction X. The assembly cable 710 is mounted to the pair of rods 422. The connecting rod group 423 comprises a pair of cross-connected connecting rods 424, and the two ends of the connecting rod 424 are connected to the pair of rods 422, respectively. In terms of height, the center of mass of the middle beam 420 is located between the pivot axis 425 of the middle beam and the assembly cable 710.

[0172] The assembly cable 710 is mounted to the edge beam and the middle beam 420.

[0173] The mounting positions of the rod 422 and the assembly cable 710 can be at least one of the following cases:

[0174] In one case, the pair of rods 422 is mounted above the rotating shaft 421, and the assembly cable 710 is mounted to the upper end of the pair of rods 422.

[0175] In another case, the pair of rods 422 is mounted below the rotating shaft 421, and the assembly cable 710 is mounted to the lower end of the pair of rods 422.

[0176] The driving device is mounted to the pair of mountings 412 and is power-coupled to the middle beam 420 for driving the middle beam 420 to pivot.

[0177] The counter-arch cable 740 is connected to the edge support structure 300 and abuts the lower end of the passing cable structure 413, and the counter-arch cable extends from top to bottom towards the passing cable structure on both sides in contact with the passing cable structure.

[0178] The load-bearing cable 720 is connected to the edge support structure 300 and the middle beam 420.

[0179] The assembly cable 710 and the load cable 720 are connected to the inter-cable connector 730 at a position spaced from the side support structure 300 or the middle support structure 400.

[0180] The terms "first", "second", and the like in the description and in the claims of the present application are used for distinguishing between similar objects and not necessarily for describing a specific sequential or chronological order. It is to be understood that the data so designated are interchangeable such that the embodiments of the present application can operate in other sequences than those described or illustrated herein, and the "first", "second", and the like can be differentiated by the context of the description. Furthermore, the terms "comprise", "include", "contain", and / or "have" should be read as non-limiting terms of inclusion, such that a data structure can comprise, include, contain, and / or have items that are not listed, and the terms "comprise", "include", "contain", and / or "have" should be read as not limiting items to only those listed.

[0181] In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like are used to indicate the orientation or position of one element relative to another element, and are not intended to limit the position or orientation of the device or element to only the positions or orientations illustrated in the drawings, and are intended to cover any variation of the position or orientation of the device or element caused by any means without departing from the scope of the present application.

[0182] In the description of the present application, "a first feature" and "a second feature" can include one or more of the features.

[0183] In the description of the present application, "a plurality" means two or more.

[0184] In the description of the present application, "on", "above", and "upper" of a first feature relative to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature therebetween.

[0185] In the description of the present application, "on", "above", and "upper" of a first feature relative to a second feature include that the first feature is directly above and obliquely above the second feature, or that the first feature is only higher than the second feature in the vertical direction.

[0186] In the description of the application, reference has been made to descriptive terms such as "one embodiment", "some embodiments", "an embodiment", "example", "specific example" or "some examples" etc. It is emphasized that each of these terms refers to a specific feature, structure, material or characteristic described in connection with a particular embodiment or example. The descriptive terms are not necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0187] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since the scope of the application is defined with respect to the appended claims.

Claims

1. A photovoltaic mount, characterized by, Comprising: a side support structure (300) comprising a side upright and a side beam pivotally mounted to the side upright, a pivot axis of the side beam being along a first direction; a middle support structure (400) comprising a middle upright (410) and a middle beam (420) pivotally mounted to the middle upright (410), a pivot axis (425) of the middle beam being at different heights from a center of mass of the middle beam (420), the pivot axis (425) of the middle beam being along the first direction; a module cable (710) mounted to the side beam and the middle beam (420).

2. The photovoltaic mount of claim 1, wherein, The middle beam (420) comprises: a pivot shaft (421) pivotally mounted to the middle upright (410), the pivot axis (425) of the middle beam coinciding with a center line of the pivot shaft (421); a pair of bars (422) connected to the pivot shaft (421) and located on both sides of the middle upright (410) along the first direction, the module cable (710) being mounted to the pair of bars (422).

3. The photovoltaic support according to claim 2, wherein: the pair of bars (422) are mounted above the pivot shaft (421), and the module cable (710) is mounted to upper ends of the pair of bars (422); or the pair of bars (422) are mounted below the pivot shaft (421), and the module cable (710) is mounted to lower ends of the pair of bars (422). The middle beam (420) further comprises:

4. The photovoltaic mount of claim 2, wherein, a connecting rod group (423) comprising a pair of cross-connected connecting rods (424), two ends of each connecting rod (424) being connected to a pair of bars (422). The middle upright (410) comprises:

5. The photovoltaic mount of claim 2, wherein, a middle upright body (411); a pair of mountings (412) spaced apart along a second direction and mounted to the middle upright body (411), the pivot shaft (421) being pivotally mounted between the pair of mountings (412), the first direction and the second direction intersecting. Further comprising:

6. The photovoltaic mount of claim 5, wherein, a driving device mounted to the pair of mountings (412) and power-coupled to the middle beam (420) for driving the middle beam (420) to pivot. The middle upright (410) comprises:

7. The photovoltaic mount of claim 1, wherein, a middle upright body (411); a pair of mountings (412) spaced apart along a second direction and mounted to the middle upright body (411); a through-cable structure (413) connected to the pair of mountings (412); The photovoltaic support further comprises: a counter-cable (740) connected to the side support structure (300) and abutting a lower end of the through-cable structure (413), the counter-cable (740) extending from top to bottom towards the through-cable structure (413) on both sides in contact with the through-cable structure (413). In terms of height, the center of mass of the middle beam (420) is located between the pivot axis (425) of the middle beam and the module cable (710).

8. The photovoltaic mount of claim 1, wherein, Further comprising:

9. The photovoltaic mount of any of claims 1-8, wherein, a load-bearing cable (720) connected to the side support structure (300) and the middle beam (420); ​ Inter-cable connectors (730) to which the assembly cables (710) and the load bearing cables (720) are connected at locations spaced from the edge support structures (300) or the mid support structures (400).

10. A photovoltaic system characterized by, Comprising: The photovoltaic rack of any one of claims 1-9; Photovoltaic assemblies mounted to the assembly cables (710) of the photovoltaic rack.

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