Flat single-shaft photovoltaic support with torque balancing function

Abstract

The invention discloses a flat single-shaft photovoltaic support with a torque balancing function, and belongs to the technical field of photovoltaic power generation equipment, the flat single-shaft photovoltaic support comprises a main shaft and a plurality of stand columns below the main shaft, and the main shaft is provided with a plurality of purlines; a sliding mechanism is arranged at the top of the spindle above the stand column and connected with an adjusting mechanism in the purline through a connecting rod, the top of the purline is connected with the edge of the photovoltaic panel through a connecting structure, and the connecting structure is connected with the adjusting mechanism; the sliding mechanism drives the photovoltaic panel above the purline to move through the connecting rod and is used for balancing the torque caused by the wind load to the photovoltaic panel. The adjusting mechanism in the purline is driven by the sliding mechanism so as to drive the photovoltaic panel to move, and the torque generated by the self weight of the photovoltaic panel and the torque generated by the wind load counteract each other so as to relieve the stress caused by the wind load, prolong the service life of the photovoltaic bracket and reduce the economic consumption; the photovoltaic panel is connected with the purline through the connecting structure and is convenient to assemble and disassemble.

Description

Technical Field

[0001] The invention belongs to the technical field of photovoltaic power generation equipment, and in particular relates to a flat single-axis photovoltaic bracket with a torque balancing function. Background Art

[0002] With the deterioration of the ecological environment and the reduction of energy sources such as oil and coal, photovoltaic power generation has been widely used as a renewable green energy, and the application of various photovoltaic brackets has gradually increased. However, for traditional flat single-axis photovoltaic brackets, the connection between the photovoltaic panel and the photovoltaic bracket through the purlin is connected by several bolts, and stress concentration is prone to occur at the connection. Especially when the photovoltaic panel is subjected to wind load, the torque caused by the photovoltaic panel on the photovoltaic bracket increases, resulting in aggravated stress concentration. In severe cases, the photovoltaic bracket will be damaged, causing serious economic losses. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a flat single-axis photovoltaic bracket with a torque balancing function.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] A flat single-axis photovoltaic bracket with a torque balancing function comprises a main shaft and a plurality of columns arranged at intervals along the length direction of the main shaft, wherein the main shaft is provided with a plurality of purlins for supporting photovoltaic panels, and the purlins are arranged perpendicular to the main shaft; a sliding mechanism is arranged at the top of the main shaft above the columns, and the sliding mechanism is connected to an adjusting mechanism inside the purlin through a connecting rod, and the top of the purlin is connected to an edge of a photovoltaic panel through a detachable connecting structure, and the connecting structure is connected to the adjusting mechanism; the sliding mechanism drives the photovoltaic panel above the purlin to move through the connecting rod, so as to balance the torque caused by wind load on the photovoltaic panel.

[0006] Furthermore, the sliding mechanism includes a motor, a lead screw, a first slider and two supports, one end of the lead screw passes through a support and is connected to the output end of the motor, and the other end of the lead screw is rotatably matched with another support; the two supports are respectively arranged on both sides of the first slider, and the lead screw is threadedly matched with the first slider; the motor and the two supports are fixed on a base plate, and the base plate is arranged at the top of the main shaft and is perpendicular to the main shaft; the two ends of the first slider are respectively connected to connecting rods, and the connecting rods are arranged perpendicular to the lead screw.

[0007] Furthermore, slide bars parallel to the lead screw are respectively provided on both sides thereof, a light hole slidably matched with the slide bar is provided on the first sliding block, and both ends of the slide bar are respectively connected to two supports.

[0008] Furthermore, both sides of the sliding mechanism are provided with clamps that can be clamped on the main shaft, and the lower ends of the clamps are connected to the columns; the upper part of the clamps is provided with a transverse through hole that cooperates with the main shaft.

[0009] Furthermore, the connection structure includes a plurality of U-shaped seats, the openings of the U-shaped seats facing sideways, for accommodating edge portions of photovoltaic panels, the open ends of the U-shaped seats being provided with clamping blocks for clamping photovoltaic panels; the plurality of U-shaped seats are divided into two groups, the openings of the two groups of U-shaped seats being opposite to each other, respectively cooperating with the edges of photovoltaic panels on both sides; the bottoms of the two groups of U-shaped seats are connected to the adjustment mechanism.

[0010] Furthermore, the adjustment mechanism includes an upper slide rail, a lower slide rail, a second slider and a third slider, the upper slide rail is arranged in an open groove at the top of the purlin, the lower slide rail is arranged at the bottom of the inner cavity of the purlin, the upper slide rail is parallel to the lower slide rail, and both are arranged along the length direction of the purlin; the second slider is slidably matched with the upper slide rail, the third slider is slidably matched with the lower slide rail, and the second slider is connected to the third slider through a connecting assembly; long holes for connecting rods to pass through are correspondingly provided on the two side walls of the purlin.

[0011] Furthermore, there are two upper slide rails, which are arranged in parallel in two open grooves at the top of the purlin; there are four U-shaped seats and four second sliders, and the lower end of the U-shaped seat is connected to the second slider. The four second sliders are grouped in twos and slideably cooperate with the two upper slide rails respectively; the connecting assembly includes two cross bars, a longitudinal bar and a vertical bar, and the two ends of the cross bar are respectively connected to the second slider, and the opposite sides of the two open grooves are provided with long holes for the cross bar to pass through; the two ends of the longitudinal bar are respectively connected to the two cross bars through connecting blocks, the lower end of the vertical bar is connected to the third slider, and the upper end is connected to the longitudinal bar through a connecting block.

[0012] Furthermore, the cross-sections of the upper slide rail and the lower slide rail are arc-shaped at the upper part and rectangular at the lower part; and the opening groove is a rectangular groove.

[0013] Furthermore, the clamping block is an L-shaped card with two continuous 90° bends, and the L-shaped card is provided with an anti-slip pad for contacting the surface of the photovoltaic panel.

[0014] Furthermore, the distance S that the sliding mechanism drives the photovoltaic panel above the purlin to move is calculated by the following formula:

[0015]

[0016] Where, M is the moment caused by wind load, obtained through fluent simulation; m is the mass of the photovoltaic panel; g is the acceleration of gravity; β is the inclination angle of the photovoltaic panel.

[0017] Compared with the prior art, the present invention has the following technical advances:

[0018] The present invention installs a sliding mechanism on the top of the main shaft above the column, drives the adjustment mechanism in the purlin through the sliding mechanism, and then drives the photovoltaic panel to move. The torque generated by the weight of the photovoltaic panel and the torque generated by the wind load offset each other, which can be used to reduce the stress caused by the wind load and reduce the wear of the photovoltaic bracket; at the same time, the photovoltaic panel is connected to the purlin through a connecting structure, which is convenient for installation and disassembly. The present invention can balance the torque caused by the wind load, increase the service life of the photovoltaic bracket, and reduce economic consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0020] In the attached picture:

[0021] Figure 1 A schematic diagram of the structure of a flat single-axis photovoltaic bracket with a torque balancing function provided by an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the installation of a photovoltaic panel on a flat single-axis photovoltaic bracket in an embodiment of the present invention;

[0023] Figure 3 for Figure 2 The main view of

[0024] Figure 4 It is a structural schematic diagram of the sliding mechanism in an embodiment of the present invention;

[0025] Figure 5 Schematic diagram of the structure of the internal adjustment mechanism of the purlin in an embodiment of the present invention;

[0026] Figure 6 for Figure 5 A-direction view in the figure;

[0027] Figure 7 It is a schematic diagram of the installation of the sliding mechanism in an embodiment of the present invention;

[0028] Figure 8 Schematic diagram of the connection between the photovoltaic panel and the purlin in an embodiment of the present invention;

[0029] Fig. 9 Schematic diagram of the photovoltaic panel before and after movement in the application of the present invention;

[0030] In the figure:

[0031] 1-main axis; 2-column; 3-photovoltaic panel; 4-purlin; 5-connecting rod;

[0032] 00-sliding mechanism; 6-motor; 7-screw; 8-first slider; 9-support; 10-bottom plate; 11-sliding rod;

[0033] 12-clamp; 13-U-shaped seat; 14-clamping block; 15-upper slide rail; 16-lower slide rail; 17-second slide block; 18-third slide block; 19-opening groove; 20-long hole; 21-cross bar; 22-longitudinal bar; 23-vertical bar; 24-connecting block. DETAILED DESCRIPTION

[0034] The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. The embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0035] like Figure 1 , Figure 2 and Figure 3 As shown, a flat single-axis photovoltaic bracket with a torque balancing function includes a main shaft 1 and a plurality of columns 2 arranged at intervals along the length direction of the main shaft 1, the main shaft 1 is provided with a plurality of purlins 4 for supporting photovoltaic panels 3, and the purlins 4 are arranged perpendicular to the main shaft 1; a sliding mechanism 00 is arranged at the top of the main shaft 1 above the columns 2, and the sliding mechanism 00 is connected to the adjustment mechanism inside the purlin 4 through a connecting rod 5, and the top of the purlin 4 is connected to the edge of the photovoltaic panel 3 through a detachable connecting structure, and the connecting structure is connected to the adjusting mechanism; the sliding mechanism 00 drives the photovoltaic panel 3 above the purlin 4 to move through the connecting rod 5, so as to balance the torque caused by the wind load on the photovoltaic panel 3. In specific applications, a drive motor for adjusting the inclination angle of the photovoltaic panel is installed on the top of the column in the middle of the main shaft; the sliding mechanism above all the columns is controlled by a controller to achieve synchronous drive, and the adjusting mechanism in the purlin is driven by the connecting rod to drive all the photovoltaic panels to move up and down synchronously, so as to offset the torque caused by the wind load, thereby alleviating the stress caused by the wind load, reducing the wear of the photovoltaic bracket, and thus extending the service life of the photovoltaic bracket; at the same time, the edge of the photovoltaic panel is connected to the purlin through a connecting structure, which is convenient and quick to install and disassemble.

[0036] In a specific embodiment of the present invention, Figure 4 , 7As shown, the sliding mechanism 00 includes a motor 6, a lead screw 7, a first slider 8 and two supports 9. One end of the lead screw 7 passes through a support 9 and is connected to the output end of the motor 6, and the other end of the lead screw 7 is rotatably matched with another support 9; the two supports 9 are respectively arranged on both sides of the first slider 8, and the lead screw 7 is threadedly matched with the first slider 8; the motor 6 and the two supports 9 are fixed on a bottom plate 10, and the bottom plate 10 is arranged on the top of the main shaft 1 and is perpendicular to the main shaft 1; the two ends of the first slider 8 are respectively connected to the connecting rod 5, and the connecting rod 5 is arranged perpendicular to the lead screw 7. At the same time, the two sides of the lead screw 7 are respectively provided with sliding rods 11 parallel to it, and the first slider 8 is provided with a light hole that is slidably matched with the sliding rod 11, and the two ends of the sliding rod 11 are respectively connected to the two supports 9. The lead screw is driven to rotate by the motor, and the lead screw drives the first slider to realize axial movement, and then the first slider drives the connecting rod to move synchronously. The use of the above-mentioned screw drive can provide sufficient constraints in each degree of freedom, so that the photovoltaic panel can be fixed at a certain position, thereby offsetting the torque caused by wind load to relieve stress.

[0037] When assembling, Figure 2 , 7 As shown, the two sides of the sliding mechanism are provided with a clamp 12 that can be clamped on the main shaft 1, and the lower end of the clamp 12 is connected to the column 2; the upper part of the clamp 12 is provided with a transverse through hole that matches the main shaft 1. The main shaft is connected to the column through the clamp to ensure a firm connection.

[0038] In a specific embodiment of the present invention, Figure 5-8 As shown, the connection structure includes a plurality of U-shaped seats 13, the opening of the U-shaped seat 13 faces the side, and is used to accommodate the edge of the photovoltaic panel 3. The opening end of the U-shaped seat 13 is provided with a clamping block 14 for clamping the photovoltaic panel 3; the plurality of U-shaped seats 13 are divided into two groups, and the openings of the two groups of U-shaped seats 13 are opposite to each other, respectively cooperating with the edges of the photovoltaic panels 3 on both sides; the bottoms of the two groups of U-shaped seats 13 are connected to the adjustment mechanism. Among them, the clamping block 14 is an L-shaped card with two continuous 90° bends, and the L-shaped card is provided with an anti-skid pad for contacting the surface of the photovoltaic panel 3, which can prevent the photovoltaic panel from slipping out of the U-shaped seat and ensure that the photovoltaic panel is firmly fixed.

[0039] In a specific embodiment of the present invention, Figure 5 , 6As shown, the adjustment mechanism includes an upper slide rail 15, a lower slide rail 16, a second slider 17 and a third slider 18. The upper slide rail 15 is arranged in an open groove 19 at the top of the purlin 4, and the lower slide rail 16 is arranged at the bottom of the inner cavity of the purlin 4. The upper slide rail 15 is parallel to the lower slide rail 16, and both are arranged along the length direction of the purlin 4; the second slider 17 is slidably matched with the upper slide rail 15, and the third slider 18 is slidably matched with the lower slide rail 16. The second slider 17 is connected to the third slider 18 through a connecting assembly; and long strip holes 20 for the connecting rod 5 to pass through are correspondingly provided on the two side walls of the purlin 4. During specific production, there are two upper slide rails 15, and the two upper slide rails 15 are arranged in parallel in the two open grooves 19 at the top of the purlin 4; there are four U-shaped seats 13 and second sliders 17, and the lower end of the U-shaped seat 13 is connected to the second slider 17. The four second sliders 17 are grouped in pairs and slideably cooperate with the two upper slide rails 15 respectively; the connecting assembly includes two cross bars 21, a longitudinal bar 22 and a vertical bar 23, and the two ends of the cross bar 21 are respectively connected to the second slider 17, and the opposite sides of the two open grooves 19 are provided with long strip holes for the cross bar 21 to pass through; the two ends of the longitudinal bar 22 are respectively connected to the two cross bars 21 through the connecting blocks 24, and the lower end of the vertical bar 22 is connected to the third slider 17, and the upper end is connected to the longitudinal bar 22 through the connecting block 24. In specific applications, the motor drives the connecting rod to move through the lead screw and the first slider, and the connecting rod drives the third slider to move. The third slider drives the longitudinal rod and the cross rod to move simultaneously through the vertical rod, and then the cross rod drives the photovoltaic panel to move synchronously through the second slider and the U-shaped seat above it.

[0040] As a preferred structure, the upper cross-section of the upper slide rail 15 and the lower slide rail 16 is arc-shaped at the top and rectangular at the bottom; the opening groove 19 is a rectangular groove.

[0041] When a traditional flat single-axis photovoltaic bracket is subjected to wind load, the wind load will generate pressure and torque on the photovoltaic panel, and the traditional flat single-axis photovoltaic bracket cannot move the photovoltaic panel. Under the pressure caused by long-term wind load, the photovoltaic bracket will be worn. The present invention can make the center of gravity of the photovoltaic panel move along the upper slide rail. When the distances between the centers of the photovoltaic panels on both sides of the photovoltaic bracket and the main axis are not equal, the torque generated by the deadweight of the photovoltaic panels on the photovoltaic bracket changes, offsetting the torque generated by the wind load. When the present invention is specifically applied, for the torque caused by the wind load, CFD numerical simulation can be used to take corresponding parameters according to the environment of the area, and the torque caused by the wind load on the photovoltaic panel in the area can be obtained through simulation. Then, based on the deadweight of the photovoltaic panel, the distance that the photovoltaic panel needs to move can be calculated, and the motor drives the lead screw slider mechanism to drive the photovoltaic panel to move, thereby offsetting the torque caused by the wind load. Among them, the distance S that the sliding mechanism drives the photovoltaic panel 3 above the purlin 4 to move is calculated by the following formula:

[0042]

[0043] Where, M is the moment caused by wind load, obtained through fluent simulation; m is the mass of the photovoltaic panel; g is the acceleration of gravity; β is the inclination angle of the photovoltaic panel.

[0044] The following is a specific application example:

[0045] First, the size of the photovoltaic panel is measured on site and modeled. Take a single photovoltaic panel as an example: the size of the photovoltaic panel is 2384mm*1303mm*35mm (length*width*thickness), the weight of the photovoltaic panel is 35kg, the height from the ground is 1.8m, the inclination angle β is 15°, and the wind direction angle is 0°. Modeling is based on this size.

[0046] Through simulation calculation in CFD fluent, when the wind speed is 18m / s, the moment M caused by the wind load on the photovoltaic panel is detected to be 171N·m. At the same time, the weight of the photovoltaic panel is 35kg. Fig. 9 shown.

[0047] The distance S that the photovoltaic panel needs to move is calculated by the following formula:

[0048]

[0049] Substituting the specific values ​​of the parameters M, β, m, and g into the above formula, it can be calculated that the photovoltaic panel needs to move downward a distance of 0.5156 m to offset the torque caused by the wind load.

[0050] In summary, the present invention has the advantages of simple and compact structure, flexible and convenient application, and more convenient loading and unloading of photovoltaic panels, which is convenient for subsequent various operations on photovoltaic panels; multiple photovoltaic panels are driven by motor-driven lead screw transmission and connecting rods to move synchronously, and the stress is offset by the movement of photovoltaic panels, which reduces the wear of photovoltaic brackets, greatly increases the ability to resist wind loads, effectively reduces the generation of wind load torque, makes photovoltaic brackets have stronger wind resistance structure, and also reduces the pressure on the main shaft, which greatly increases the service life of photovoltaic brackets. At the same time, the lead screw transmission can lock the photovoltaic panel at any time, ensuring the constraints of the photovoltaic structure in various degrees of freedom.

[0051] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A flat single-axis photovoltaic bracket with a torque balancing function, characterized in that: It includes a main shaft and a plurality of columns arranged at intervals along the length direction of the main shaft, wherein the main shaft is provided with a plurality of purlins for supporting photovoltaic panels, and the purlins are arranged perpendicular to the main shaft; a sliding mechanism is arranged at the top of the main shaft above the columns, and the sliding mechanism is connected to the adjusting mechanism inside the purlin through a connecting rod, and the top of the purlin is connected to the edge of the photovoltaic panel through a detachable connecting structure, and the connecting structure is connected to the adjusting mechanism; the sliding mechanism drives the photovoltaic panel above the purlin to move through the connecting rod, so as to balance the torque caused by the wind load on the photovoltaic panel.

2. The flat single-axis photovoltaic bracket with torque balancing function according to claim 1, characterized in that: The sliding mechanism comprises a motor, a lead screw, a first slider and two supports, one end of the lead screw passes through a support and is connected to the output end of the motor, and the other end of the lead screw is rotatably matched with the other support; The two supports are respectively arranged on both sides of the first slider, and the lead screw is threadedly matched with the first slider; the motor and the two supports are fixed on a base plate, and the base plate is arranged on the top of the main shaft and is perpendicular to the main shaft; the two ends of the first slider are respectively connected to a connecting rod, and the connecting rod is arranged perpendicular to the lead screw.

3. The flat single-axis photovoltaic bracket with torque balancing function according to claim 2, characterized in that: Slide rods parallel to the lead screw are respectively arranged on both sides thereof, a light hole slidably matched with the slide rod is arranged on the first sliding block, and two ends of the slide rod are respectively connected to two supports.

4. The flat single-axis photovoltaic bracket with torque balancing function according to claim 3, characterized in that: Hoops that can be clamped on the main shaft are provided on both sides of the sliding mechanism, and the lower ends of the hoop are connected to the columns; and the upper part of the hoop is provided with a transverse through hole that matches the main shaft.

5. The flat single-axis photovoltaic bracket with torque balancing function according to claim 4, characterized in that: The connection structure includes a plurality of U-shaped seats, the openings of the U-shaped seats face sideways and are used to accommodate the edge portions of the photovoltaic panels. The open ends of the U-shaped seats are provided with clamping blocks for clamping the photovoltaic panels. The plurality of U-shaped seats are divided into two groups, the openings of the two groups of U-shaped seats are opposite to each other, and respectively cooperate with the edges of the photovoltaic panels on both sides. The bottoms of the two groups of U-shaped seats are connected to the adjustment mechanism.

6. The flat single-axis photovoltaic bracket with torque balancing function according to claim 5, characterized in that: The adjustment mechanism includes an upper slide rail, a lower slide rail, a second slider and a third slider. The upper slide rail is arranged in an open groove at the top of the purlin, and the lower slide rail is arranged at the bottom of the inner cavity of the purlin. The upper slide rail is parallel to the lower slide rail and both are arranged along the length direction of the purlin; the second slider is slidably matched with the upper slide rail, and the third slider is slidably matched with the lower slide rail. The second slider is connected to the third slider through a connecting assembly; long holes for connecting rods to pass through are correspondingly provided on the two side walls of the purlin.

7. The flat single-axis photovoltaic bracket with torque balancing function according to claim 6, characterized in that: There are two upper slide rails, which are arranged in parallel in the two open grooves at the top of the purlin; there are four U-shaped seats and four second sliders, and the lower end of the U-shaped seat is connected to the second slider. The four second sliders are grouped in twos and slideably cooperate with the two upper slide rails respectively; the connecting assembly includes two cross bars, a longitudinal bar and a vertical bar, and the two ends of the cross bar are respectively connected to the second slider, and the opposite sides of the two open grooves are provided with long holes for the cross bar to pass through; the two ends of the longitudinal bar are respectively connected to the two cross bars through connecting blocks, the lower end of the vertical bar is connected to the third slider, and the upper end is connected to the longitudinal bar through a connecting block.

8. The flat single-axis photovoltaic bracket with torque balancing function according to claim 7, characterized in that: The upper and lower slide rails have cross-sections with arc shapes at the top and rectangle shapes at the bottom; the opening grooves are rectangular grooves.

9. The flat single-axis photovoltaic bracket with torque balancing function according to claim 7, characterized in that: The clamping block is an L-shaped card with two continuous 90° bends, and an anti-slip pad for contacting the surface of the photovoltaic panel is provided on the L-shaped card.

10. A flat single-axis photovoltaic bracket with a torque balancing function according to any one of claims 1 to 9, characterized in that: The distance S that the sliding mechanism drives the photovoltaic panel above the purlin to move is calculated by the following formula: Where, M is the moment caused by wind load, obtained through fluent simulation; m is the mass of the photovoltaic panel; g is the acceleration of gravity; β is the inclination angle of the photovoltaic panel.

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