A main beam and its application and photovoltaic tracking bracket

Abstract

The present invention discloses a main beam and its application and a photovoltaic tracking bracket, wherein the main beam includes: a flat plate and an elliptical arc plate, the two ends of the flat plate are respectively fixedly connected to the corresponding ends of the elliptical arc plate to form a ring, and the plane where the flat plate is located is perpendicular to the long axis of the ellipse where the elliptical arc plate is located. At the same time, the application of the main beam in the photovoltaic tracking bracket is provided. The photovoltaic tracking bracket includes a main beam, and also includes: a column; a bearing seat, which includes a bearing ring, a Z-shaped support plate and a bottom plate connected in sequence, and the cross-sectional shape of the Z-shaped support plate is Z-shaped, the main beam is installed in the bearing ring, and the flat plate of the main beam is facing the photovoltaic module, and the bottom plate is connected to the column. Under the premise of ensuring the same thickness, the main beam of the present invention has an improved transverse section resistance moment and saves costs. It is applied to the photovoltaic tracking bracket to reduce the hot spot effect of the double-sided photovoltaic module and extend the life of the double-sided photovoltaic module.

Description

Technical Field

[0001] The invention relates to the field of structural design of a photovoltaic tracking bracket, in particular to a main beam and application thereof and a photovoltaic tracking bracket. Background Art

[0002] In the existing technology, photovoltaic power generation has become a trend and is widely used in various places. Photovoltaic power generation directly converts solar energy into electrical energy based on the principle of photovoltaic effect. Whether it is used independently or connected to the grid, the photovoltaic power generation system mainly consists of three parts: photovoltaic components, controllers and inverters. In order to ensure that the photovoltaic components maintain a high power generation efficiency, photovoltaic tracking brackets have been developed. The photovoltaic components are installed on the main beam, and the main beam drives the photovoltaic components to rotate as the sun moves.

[0003] Since the main beam of the photovoltaic tracking bracket needs to reach a certain bending strength, the U.S. patent number is US7647924B2, SYSTEM FOR SUPPORTING ENERGY CONVERSION MODULES, which discloses a main beam composed of a circular arc plate and a flat plate. Although the bending strength of the main beam is partially improved, the main beam is still heavy in order to achieve the same strength and rigidity. The cost of the main beam accounts for a relatively high proportion of the cost of the photovoltaic tracking bracket, resulting in huge costs for the photovoltaic tracking bracket. Summary of the invention

[0004] The purpose of the present invention is to provide a main beam and its application and a photovoltaic tracking bracket, wherein the transverse cross-sectional moment resistance of the main beam is improved, the weight is lighter, and the cost of the main beam is saved. After the photovoltaic tracking bracket uses the above main beam, in addition to achieving the above-mentioned technical effects, its force is more uniform and the installation is more convenient and quick.

[0005] The technical solution provided by the present invention is as follows:

[0006] A main beam comprises: a flat plate and an elliptical arc plate, wherein two ends of the flat plate are respectively fixedly connected to corresponding ends of the elliptical arc plate to form a ring shape, and the plane where the flat plate is located is perpendicular to the major axis of the ellipse where the elliptical arc plate is located.

[0007] In the above structure, due to its special shape, when the main beam is used in a photovoltaic tracking bracket, the transverse section resistance moment of the main beam is improved by sacrificing less torsional performance. Compared with the arc D-shaped main beam in the prior art, while ensuring the same thickness, the transverse section resistance moment is increased by 5.14%, and 0.04% of steel is saved per meter, which has good practical application value.

[0008] Preferably, a transition section is provided between the flat plate and the elliptical arc plate, and the outer surface of the transition section has a smooth transition.

[0009] The flat plate and the elliptical arc plate are connected by a transition section to prevent the connection between the flat plate and the elliptical arc plate from being sharp and causing scratches to workers.

[0010] Preferably, the outer surface of the plate and / or the transition section has a reflective layer.

[0011] When a bifacial photovoltaic module is installed on the main beam, part of the bifacial photovoltaic module will be blocked by the main beam and cannot be irradiated with light. The shielded part of the bifacial photovoltaic module will be used as a load to consume the energy generated by other parts of the bifacial photovoltaic module that are illuminated. At this time, the shielded part of the bifacial photovoltaic module will heat up, forming a hot spot effect, which will seriously shorten the life of the bifacial photovoltaic module. This structure reflects light to the shielded part of the bifacial photovoltaic module through the reflective layer, reducing the generation of the hot spot effect and extending the life of the bifacial photovoltaic module.

[0012] Provides application of a main beam in a photovoltaic tracking bracket installed with double-sided photovoltaic modules.

[0013] A photovoltaic tracking bracket includes the above-mentioned main beam, and also includes: a column; a bearing seat, the bearing seat includes: a bearing ring, a Z-shaped support plate and a bottom plate connected in sequence from top to bottom, the cross-section of the Z-shaped support plate in the horizontal direction is Z-shaped, the main beam is installed in the bearing ring, and the flat plate of the main beam faces the photovoltaic module, and the bottom plate is connected to the column.

[0014] In the above structure, since the bearing ring is fixed by a Z-shaped support plate, compared with the prior art that uses a support structure with a C-shaped cross section to fix the bearing ring, the Z-shaped support plate is subjected to more uniform force, thereby being able to bear a larger load.

[0015] Preferably, the photovoltaic tracking bracket also includes: a column top seat, the column top seat includes a first connecting plate, both ends of the first connecting plate extend toward the column to obtain a second connecting plate, the second connecting plate is connected to the column, the first connecting plate is provided with a first horizontal adjustment waist hole, the bottom plate is provided with a second horizontal adjustment waist hole corresponding to the first horizontal adjustment waist hole, the first horizontal adjustment waist hole and the second horizontal adjustment waist hole are locked by bolts, the long axis of the first horizontal adjustment waist hole and the long axis of the second horizontal adjustment waist hole are perpendicular to each other and the long axis of the first horizontal adjustment waist hole is parallel to the extension direction of the main beam or the long axis of the first horizontal adjustment waist hole is perpendicular to the extension direction of the main beam.

[0016] When adjusting the position or angle of the main beam, loosen the bolts, and then adjust the position of the main beam in its own axial direction or perpendicular to its axial direction through the cooperation of the first horizontal adjustment waist hole and the second horizontal adjustment waist hole, or rotate the main beam to adjust the angle of the main beam on the horizontal plane, and finally tighten the bolts to fix the main beam.

[0017] Preferably, there are two first horizontal adjustment waist holes, which are symmetrical about the center of the first connecting plate, and there are two second horizontal adjustment waist holes, which are symmetrical about the center of the bottom plate.

[0018] By respectively setting two first horizontal adjustment waist holes and a second horizontal adjustment waist hole, and since they are respectively symmetrical about the center of the first connecting plate and the base plate, when the angle of the main beam is adjusted by rotating the base plate, the base plate can use its center as the rotation center, and the angle of the main beam can be adjusted more accurately.

[0019] Preferably, each of the second connecting plates is provided with a vertical adjustment waist hole and a vertical fixing hole, a column adjustment waist hole is provided at a position of the column corresponding to the vertical adjustment waist hole, and a column fixing hole is provided at a position of the column corresponding to the vertical fixing hole, the long axis of the vertical adjustment waist hole and the long axis of the column adjustment waist hole are perpendicular to each other, the column adjustment waist hole and the vertical adjustment waist hole are fastened and connected by bolts, and the column fixing hole and the vertical fixing hole are fastened and connected by bolts.

[0020] In the above structure, by adjusting the positions of the vertical adjustment waist hole and the column adjustment waist hole, the angle adjustment of the column top seat in the height direction can be achieved, and its rotation center is the center of the vertical fixing hole.

[0021] Preferably, the first end of the main beam is a reduced tube section, which is formed by extrusion at the first end of the main beam, and the inner surface of the reduced tube section is welded or riveted with a locking nut; the reduced tube section of the main beam extends into the second end of the adjacent main beam and a locking bolt is used to pass through the second end of the adjacent main beam and the reduced tube section of the main beam in sequence, and then is tightened and fixed with the locking nut at the corresponding position.

[0022] The above structure is used to connect adjacent main beams. Compared with the connection using connecting plates in the prior art, this method uses more bolts and has a slow installation speed. Since the locking nuts are pre-arranged on the inner surface of the reduction tube section, the present structure only needs to tighten the locking bolts with the corresponding locking nuts, which makes the installation faster and saves costs because no additional connecting plates are required.

[0023] Preferably, there are a plurality of locking nuts, and the locking nuts are evenly arranged around the inner surface of the reduced tube section of the main beam, and the locking nuts are arranged in a one-to-one correspondence with the locking bolts.

[0024] The connection between adjacent main beams is achieved by using a plurality of locking nuts evenly arranged around the circumference, making the connection between the two more secure.

[0025] The main beam and its application and photovoltaic tracking bracket provided by the present invention can bring the following beneficial effects:

[0026] The main beam of the present invention has better transverse section resistance moment and lighter weight under the premise of achieving the same thickness. Compared with the prior art, the transverse section resistance moment is increased by 5.14%, and 0.04% of steel is saved per meter. When it is used in a photovoltaic tracking bracket, the main beam can reflect light to the shaded part of the double-sided photovoltaic module, thereby reducing the hot spot effect of the double-sided photovoltaic module and extending the service life of the double-sided photovoltaic module. At the same time, due to the use of a Z-shaped support plate to support the bearing ring, compared with the support structure with a C-shaped cross-section in the prior art, the Z-shaped support plate is more evenly stressed, so that the load capacity of the Z-shaped support plate is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The preferred implementation scheme will be described below in a clear and understandable manner with reference to the accompanying drawings, and the above-mentioned characteristics, technical features, advantages and implementation methods of the main beam and its application and the photovoltaic tracking bracket will be further explained.

[0028] Figure 1 It is a three-dimensional schematic diagram of the main beam;

[0029] Figure 2 It is the cross-section of the main beam;

[0030] Figure 3 It is a three-dimensional schematic diagram of a photovoltaic tracking bracket;

[0031] Figure 4 It is a schematic diagram of the connection of adjacent main beams;

[0032] Figure 5 It is a three-dimensional schematic diagram of the reduced tube section of the main beam;

[0033] Figure 6 This is a structural schematic diagram of the first type of main beam at the reduced tube section;

[0034] Figure 7 This is a structural schematic diagram of the second type of main beam at the reduced tube section;

[0035] Figure 8 It is a three-dimensional schematic diagram of the bearing seat;

[0036] Fig. 9 It is a top view of the base plate and the Z-shaped support plate;

[0037] Fig.10 It is a three-dimensional schematic diagram of the top seat of the column.

[0038] Description of Figure Numbers:

[0039] 1-main beam, 1a-reduced tube section, 1b-first connecting hole, 1c-second connecting hole, 1d-flat plate, 1e-transition section, 1f-elliptical arc plate, 2a-locking nut, 2b-locking bolt, 3-column, 4a-first connecting plate, 4b-second connecting plate, 4c-first horizontal adjustment waist hole, 4d-vertical adjustment waist hole, 4e-vertical fixing hole, 5-bottom plate, 5a-second horizontal adjustment waist hole, 6-Z-type support plate, 7-bearing ring. DETAILED DESCRIPTION

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0041] In order to simplify the drawings, each figure only schematically shows the parts related to the present invention, which do not represent the actual structure of the product.

[0042] [Example 1]

[0043] like Figure 1-2 As shown, Example 1 discloses a specific implementation of a main beam, which specifically includes: a flat plate 1d and an elliptical arc plate 1f, the two ends of the flat plate 1d are respectively fixedly connected to the corresponding ends of the elliptical arc plate 1f to form a ring, and the plane where the flat plate 1d is located is perpendicular to the major axis of the ellipse where the elliptical arc plate 1f is located. In order to achieve a smooth transition between the flat plate 1d and the elliptical arc plate 1f, a transition section 1e is provided between the flat plate 1d and the elliptical arc plate 1f, and the outer surface of the transition section 1e is smoothly transitioned.

[0044] When the main beam 1 is installed on the photovoltaic tracking bracket, the main beam 1 is used to perform a bending performance test and the weight per unit length is calculated. The specific data are listed in the following Table 1.

[0045]

Table 1

[0046]

[0047] The arc D-shaped main beam in US7647924B2 mentioned in the background technology is installed on the photovoltaic tracking bracket, so that the arc D-shaped main beam has the same thickness as the main beam 1 of this embodiment. The test shows that the transverse section resistance moment of the arc D-shaped main beam is 46340 / mm 3 The weight per unit length is 12.451 kg. By comparing the data shown in Table 1, it can be seen that the main beam 1 of this embodiment has a 5.14% increase in transverse section resistance moment and a 0.04% cost saving when the thickness is the same.

[0048] [Example 2]

[0049] like Figure 1-2 As shown, Example 2 is based on Example 1, and the outer surfaces of the flat plate 1d and the transition section 1e of Example 2 have a reflective layer, and the reflective layer is formed by coating a reflective material or wrapping tin foil. In this embodiment, the reflective material is metal spray paint. In other specific embodiments, the reflective material can also be white paint, cold light film, etc., which will not be repeated here.

[0050] When the main beam 1 is installed on the photovoltaic tracking bracket, the flat plate 1d faces the double-sided photovoltaic module, and the light is reflected by the reflective layer to the part of the double-sided photovoltaic module blocked by the main beam 1, thereby alleviating the hot spot effect. In areas with different types of radiation resources, the life of the double-sided photovoltaic module can still be maintained at 25 years. The main beam 1 in Example 1 is installed on the photovoltaic tracking bracket. In areas with good radiation resources, the double-sided photovoltaic module may fail in the blocked area on the back due to the hot spot effect, thereby greatly reducing the life of the double-sided photovoltaic module.

[0051] Furthermore, in order to achieve diffuse reflection at the flat plate 1d and the transition section 1e, so that the light received by the blocked part of the double-sided photovoltaic module is more uniform, the outer surface of the flat plate 1d and the transition section 1e is designed to be rough, and then a reflective layer is laid on the rough outer surface, that is, the reflective surface is a diffuse reflection surface, so that when light is irradiated on the reflective layer, diffuse reflection is formed due to the unevenness of the reflective layer.

[0052] Of course, the outer surface of the individual flat plate 1d or the outer surface of the individual transition section 1e may also have a reflective layer, which can reflect light to a certain extent at the blocked part of the double-sided photovoltaic module, thereby alleviating the hot spot effect, which will not be elaborated here.

[0053] [Example 3]

[0054] like Figure 1 to Figure 6 , Figures 8 to 10 As shown, Example 3 discloses a specific implementation of a photovoltaic tracking bracket, including any one of the main beams 1 in Example 1 or 2, and also including: a column 3 and a bearing seat,

[0055] like Figure 8 As shown, the bearing seat includes: a bearing ring 7, a Z-shaped support plate 6 and a bottom plate 5 connected in sequence from top to bottom, wherein the cross-sectional shape of the Z-shaped support plate 6 in the horizontal direction is Z-shaped, the main beam 1 is installed in the bearing ring 7, and the flat plate 1d of the main beam 1 faces the photovoltaic module, and the bottom plate 5 is connected to the column 3. Compared with the support structure with a C-shaped cross-sectional shape used in the prior art, the Z-shaped support plate 6 is more evenly stressed, so it can withstand a larger load.

[0056] Better, such as Figure 3 , Figures 8 to 10 As shown, in order to achieve adjustment of the position and angle of the main beam 1, this embodiment also includes: a column top seat, wherein the column top seat includes a horizontally arranged first connecting plate 4a, both ends of the first connecting plate 4a extend toward the column 3 to obtain a second connecting plate 4b, and the second connecting plate 4b is connected to the column 3. In this embodiment, both ends of the first connecting plate 4a extend downward to obtain the second connecting plate 4b, that is, the second connecting plate 4b is vertically arranged.

[0057] like Fig.10 As shown, the first connecting plate 4a is provided with two first horizontal adjustment waist holes 4c which are symmetrical about the center of the first connecting plate 4a, and the centers of the two first horizontal adjustment waist holes 4c are located on the same diagonal line. Figure 8-Figure 9 As shown, two second horizontal adjustment waist holes 5a are symmetrical about the center of the bottom plate 5 at the bottom plate 5 corresponding to the first horizontal adjustment waist hole 4c, and the centers of the two second horizontal adjustment waist holes 5a are located on the same diagonal line, and the two second horizontal adjustment waist holes 5a are respectively located on both sides of the Z-shaped support plate, and the first horizontal adjustment waist hole 4c and the second horizontal adjustment waist hole 5a are locked by bolts.

[0058] like Figures 8 to 10 As shown, the long axis of the first horizontal adjustment waist hole 4c is perpendicular to the long axis of the second horizontal adjustment waist hole 5a, the long axis of the first horizontal adjustment waist hole 4c is perpendicular to the extension direction of the main beam 1, and the long axis of the second horizontal adjustment waist hole 5a is parallel to the extension direction of the main beam 1.

[0059] When adjusting the horizontal position of the main beam 1, first loosen the bolts locking the first horizontal adjustment waist hole 4c and the second horizontal adjustment waist hole 5a, move the main beam 1 to the appropriate position, and then tighten the bolts to fix the bottom plate 5 and the first connecting plate 4a of the column top seat.

[0060] When adjusting the angle of the main beam 1 in the horizontal direction, first loosen the bolts locking the first horizontal adjustment waist hole 4c and the second horizontal adjustment waist hole 5a, rotate the main beam 1 with the center of the base plate 5 as the rotation center, and after adjusting the main beam 1 to a suitable angle, tighten the bolts to fix the base plate 5 and the first connecting plate 4a of the column top seat. Of course, the horizontal position of the main beam 1 can be adjusted first, and then the angle in the horizontal direction can be adjusted. The adjustment method is the same as mentioned above.

[0061] In other specific embodiments, the long axis of the first horizontal adjustment waist hole 4c can also be parallel to the extension direction of the main beam 1 and the long axis of the second horizontal adjustment waist hole 5a can be perpendicular to the extension direction of the main beam 1, which will not be repeated here.

[0062] In order to achieve the angle adjustment of the column top seat in the height direction, such as Figure 3 and Fig.10 As shown, each second connecting plate 4b is provided with a vertical adjustment waist hole 4d and a vertical fixing hole 4e, that is, each of the two second connecting plates 4b of this embodiment is provided with a vertical adjustment waist hole 4d and a vertical fixing hole 4e, and the column 3 is provided with a column adjustment waist hole at the position corresponding to the vertical adjustment waist hole 4d, and the column 3 is provided with a column fixing hole at the position corresponding to the vertical fixing hole 4e, that is, the side walls on both sides of the column 3 are provided with a column adjustment waist hole and a column fixing hole, and the long axis of the vertical adjustment waist hole 4d is perpendicular to the long axis of the column adjustment waist hole, as shown in FIG. Fig.10 As shown, the long axis of the vertical adjustment waist hole 4d is parallel to the vertical direction, the column adjustment waist hole is fastened to the vertical adjustment waist hole 4d by bolts, and the column fixing hole is fastened to the vertical fixing hole 4e by bolts.

[0063] When it is necessary to adjust the height angle of the main beam 1 through the column top seat, loosen the bolts connecting the column adjustment waist hole and the vertical adjustment waist hole 4d, then adjust the main beam 1 to a suitable angle in the height direction, and then tighten the bolts to fix it.

[0064] Of course, the long axis of the vertical adjustment waist hole 4d can also be perpendicular to the vertical direction, and at the same time, the long axis of the column adjustment waist hole is parallel to the vertical direction, which can also achieve the purpose of adjusting the angle of the main beam 1 in the height direction.

[0065] like Figures 4 to 6 As shown, the first end of the main beam 1 is a reduced pipe section 1a, and the reduced pipe section 1a is the first end of the main beam 1 ( Figure 5 The left end of the middle main beam 1 is formed by extrusion, and the reduced tube section 1a is provided with 8 first connection holes 1b, which are divided into two groups. The 4 first connection holes 1b in each group are evenly arranged on the reduced tube section 1a, and the two groups of first connection holes 1b are arranged along the axis direction of the main beam 1. Figure 6 As shown, a locking nut 2a is welded at each first connecting hole 1b on the inner surface of the shrink tube section 1a. Figure 4 As shown, the second end of the main beam 1 ( Figure 5 A second connecting hole 1c is provided at the position of the first connecting hole 1b of the reduced tube section 1a) corresponding to the right end of the middle main beam 1, that is, 8 second connecting holes 1c are provided at the second end of the main beam 1. When adjacent main beams 1 are connected, the reduced tube section 1a of the main beam 1 extends into the second end of the adjacent main beam 1 and the locking bolts 2b are used to sequentially pass through the second connecting hole 1c of the second end of the adjacent main beam 1 and the first connecting hole 1b of the reduced tube section 1a of the main beam 1, and then are tightened and fixed with the locking nuts 2a at the first connecting hole 1b. That is, in this embodiment, in order to achieve the connection of adjacent main beams 1, 8 locking bolts 2b are required.

[0066] In other specific embodiments, the number of the first connecting hole 1b, the second connecting hole 1c, the locking nut 2a and the locking bolt 2b is not limited to this example, but may be other numbers. The first connecting hole 1b may not be arranged around the reduced tube section 1a, but may be arranged at any position of the reduced tube section 1a. As long as the first connecting hole 1b and the second connecting hole 1c can be connected to each other through the locking nut 2a and the locking bolt 2b, there is no limitation here.

[0067] [Example 4]

[0068] like Figure 7 As shown, the structure of Example 4 is basically the same as that of Example 3. The difference between Example 4 and Example 3 is that the locking nut 2a of Example 4 is riveted to the inner surface of the shrink tube section 1a.

[0069] It should be noted that the above embodiments can be freely combined as needed. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A photovoltaic tracking bracket, characterized in that: include: Main beam containing slab; Column; A bearing seat, the bearing seat comprising: a bearing ring, a Z-shaped support plate and a bottom plate connected in sequence from top to bottom, the Z-shaped support plate having a Z-shaped cross-section in the horizontal direction, the main beam being installed in the bearing ring, and the flat plate of the main beam facing the photovoltaic module, and the bottom plate being connected to the column; A column top seat, the column top seat includes a first connecting plate, both ends of the first connecting plate extend toward the column to obtain a second connecting plate, the second connecting plate is connected to the column, a first horizontal adjustment waist hole is provided on the first connecting plate, and a second horizontal adjustment waist hole is provided on the bottom plate corresponding to the first horizontal adjustment waist hole, the first horizontal adjustment waist hole and the second horizontal adjustment waist hole are locked by bolts, the long axis of the first horizontal adjustment waist hole and the long axis of the second horizontal adjustment waist hole are perpendicular to each other and the long axis of the first horizontal adjustment waist hole is parallel to the extension direction of the main beam or the long axis of the first horizontal adjustment waist hole is perpendicular to the extension direction of the main beam.

2. The photovoltaic tracking bracket according to claim 1, characterized in that: There are two first horizontal adjustment waist holes, and the two first horizontal adjustment waist holes are symmetrical about the center of the first connecting plate. There are two second horizontal adjustment waist holes, and the two second horizontal adjustment waist holes are symmetrical about the center of the bottom plate.

3. The photovoltaic tracking bracket according to claim 1, characterized in that: Each of the second connecting plates is provided with a vertical adjustment waist hole and a vertical fixing hole. A column adjustment waist hole is provided at a position of the column corresponding to the vertical adjustment waist hole, and a column fixing hole is provided at a position of the column corresponding to the vertical fixing hole. The long axis of the vertical adjustment waist hole is perpendicular to the long axis of the column adjustment waist hole. The column adjustment waist hole and the vertical adjustment waist hole are fastened and connected by bolts, and the column fixing hole and the vertical fixing hole are fastened and connected by bolts.

4. The photovoltaic tracking bracket according to claim 1, characterized in that: The first end of the main beam is a reduced tube section, the reduced tube section is formed by extrusion at the first end of the main beam, and a locking nut is welded or riveted on the inner surface of the reduced tube section; The reduced tube section of the main beam extends into the second end of the adjacent main beam and a locking bolt is used to sequentially pass through the second end of the adjacent main beam and the reduced tube section of the main beam and then is tightened and fixed with a locking nut at a corresponding position.

5. The photovoltaic tracking bracket according to claim 4, characterized in that: There are a plurality of locking nuts, which are evenly arranged on the inner surface of the reduced tube section of the main beam, and the locking nuts are arranged in a one-to-one correspondence with the locking bolts.

6. The photovoltaic tracking bracket according to claim 1, characterized in that: The main beam also includes an elliptical arc plate, the two ends of the flat plate are respectively fixedly connected to the corresponding ends of the elliptical arc plate to form a ring, and the plane where the flat plate is located is perpendicular to the major axis of the ellipse where the elliptical arc plate is located.

7. The photovoltaic tracking bracket according to claim 6, characterized in that: A transition section is provided between the flat plate and the elliptical arc plate, and the outer surface of the transition section is smoothly transitioned.

8. The photovoltaic tracking bracket according to claim 7, characterized in that: The outer surface of the plate and / or the transition section has a reflective layer.

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