Photovoltaic support mounting structure

By using aluminum alloy material and unique T-type connectors and L-type corner bracket designs, the problems of heavy photovoltaic brackets, inconvenient installation, and insufficient adaptability have been solved. This has resulted in lightweight, convenient installation, and high stability, making it suitable for complex terrain, reducing transportation and installation costs, and extending the lifespan of the brackets.

CN223758203UActive Publication Date: 2026-01-02CHINA ENERGY CONSTR GRP NORTHWEST ELECTRIC POWER CONST
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Patent Information

Application Number
CN202520058434.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-01-10
Publication Date
2026-01-02
Estimated Expiration
2035-01-10

AI Technical Summary

Technical Problem

Existing photovoltaic mounting systems suffer from problems such as heavy weight, inconvenient installation, high cost, and poor adaptability, making it difficult to operate stably and install flexibly in harsh environments.

Method used

The photovoltaic bracket is made of aluminum alloy and features a design with T-type connectors and L-type corner brackets. Through the combination of aluminum alloy main beams, T-type connectors, L-type corner brackets and aluminum alloy crossbeams, it achieves lightweight, convenient installation and high stability, and is adaptable to complex terrain.

Benefits of technology

It significantly reduces the overall weight of photovoltaic brackets, reduces transportation and installation costs, improves installation efficiency and structural stability, and extends service life.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of photovoltaic support installation, and discloses a photovoltaic support installation structure which comprises an aluminum alloy main beam, a T-shaped connector, an L-shaped corner brace and an aluminum alloy cross beam, and a first positioning hole, a second positioning hole and a third positioning hole which are evenly distributed are formed in the outer surface of the aluminum alloy main beam. The photovoltaic support installation structure is made of aluminum alloy materials, the overall weight is remarkably reduced by means of the lightweight design of the photovoltaic support installation structure, the transportation cost and the installation cost are reduced accordingly, application of the photovoltaic support installation structure in remote areas becomes reality, the installation structure is endowed with great flexibility through the unique design of the T-shaped connectors and the L-shaped corner braces, and the installation structure is convenient to use. Compared with the prior art, the aluminum alloy support can quickly adapt to various site conditions, the installation efficiency is greatly improved, meanwhile, the precision and stability of connection of the aluminum alloy main beam and the aluminum alloy cross beam are guaranteed through the T-shaped connectors and the L-shaped corner connectors, force of the aluminum alloy main beam and the aluminum alloy cross beam is evenly distributed through the design, local stress concentration is effectively reduced, and therefore the service life of the support is prolonged.
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Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic support installation, in particular to a photovoltaic support installation structure. BACKGROUND

[0002] With the growth of global energy demand and the enhancement of environmental protection awareness, solar energy as a clean and sustainable energy has been widely concerned. Photovoltaic support as an important part of photovoltaic system not only bears the function of supporting photovoltaic components, but also ensures that photovoltaic components can operate stably in various harsh environments, and is convenient for installation and maintenance, and reduces the overall cost. The photovoltaic support on the current market is mostly made of steel material, and is assembled by bolt connection. Although the structure is stable, there are still problems in weight, installation convenience and cost control.

[0003] In order to overcome the defects of traditional metal support, various alternative solutions have been developed in the industry. One is the application of lightweight alloy material. This kind of material has a high strength-weight ratio, which can reduce the overall weight while ensuring sufficient structural stability, but the processing cost is high. Two is the use of plastic composite material. Although this kind of material can significantly reduce the cost, it is easy to be damaged in extreme weather conditions due to its weak mechanical properties. Three is the modular design idea, that is, the photovoltaic support is divided into several standard units and quickly spliced on site. This method improves the installation efficiency, but also brings the problem of loose connection parts. In addition, pre-embedded foundation, self-leveling foot and other innovative designs are applied to specific occasions, and each puts forward effective solutions to the installation problems in different environments.

[0004] Although the above solutions improve some performance indicators of photovoltaic support to some extent, there are still obvious limitations. The high cost of lightweight alloy material limits its large-scale promotion. Plastic composite material has poor weather resistance and is easy to age when exposed to the outside for a long time. Although the modular design is convenient, it lacks flexibility when facing complex terrain. The construction period of pre-embedded foundation is long, and it is difficult to meet the demand of rapid construction. In order to solve the above problems, a photovoltaic support installation structure is proposed. CONTENT OF THE INVENTION

[0005] In view of the shortcomings of the prior art, the present application provides a photovoltaic support installation structure, which solves the problems of heavy photovoltaic support, inconvenient installation, high cost and poor adaptability, and provides a more lightweight, simple and fast installation, economical and practical photovoltaic support installation structure.

[0006] To achieve the above object, the present application provides the following technical scheme: a photovoltaic support mounting structure, comprising an aluminum alloy main beam, a T-shaped connector, an L-shaped corner code and an aluminum alloy cross beam, the outer surface of the aluminum alloy main beam is provided with uniformly distributed positioning holes one, two and three, the T-shaped connector is sleeved on the outer surface of the aluminum alloy main beam, the T-shaped connector comprises a T-shaped plate and a vertical guide rail and a horizontal guide rail fixedly connected to the outer surface of the T-shaped plate, and two reinforcing plates, the outer surfaces of the vertical guide rail and the horizontal guide rail are fixedly connected through the two reinforcing plates respectively, the outer surface of the T-shaped plate is provided with two positioning holes four, the outer surface of the vertical guide rail is provided with two positioning holes five, one end of the aluminum alloy cross beam is sleeved on the inner wall of the horizontal guide rail, and the outer surface of the T-shaped plate is provided with an observation port.

[0007] Through the above scheme, the overall weight of the photovoltaic support is significantly reduced by using aluminum alloy material, the transportation cost and installation cost are reduced, the application in remote areas is possible, the unique T-shaped connector and L-shaped corner code design endows the mounting structure with great flexibility, different site conditions can be quickly adapted, the installation efficiency is improved, and the accuracy and stability of the connection between the aluminum alloy main beam and the aluminum alloy cross beam are ensured through the setting of the T-shaped connector and the L-shaped corner code, so that the stress of the aluminum alloy main beam and the aluminum alloy cross beam is uniformly distributed, the local stress concentration is reduced, and the service life of the support is prolonged.

[0008] Further, the two ends of the aluminum alloy cross beam are provided with positioning holes six and horizontal grooves, the two sides of the L-shaped corner code are provided with positioning bolts three, the L-shaped corner code is connected to one end of the aluminum alloy cross beam through the positioning bolts three and the positioning holes six, and the positioning bolts three are matched with the positioning holes three.

[0009] Through the above scheme, the L-shaped corner code can be stably connected between the aluminum alloy main beam and the aluminum alloy cross beam, and the connection between the aluminum alloy main beam and the aluminum alloy cross beam is reinforced.

[0010] Further, the inner wall of the T-shaped plate is fixedly connected with a vertical guide block and a horizontal guide block, the vertical guide block is sleeved on the inner wall of the aluminum alloy main beam, and the horizontal guide block is slidingly sleeved on the inner wall of the horizontal groove.

[0011] Through the above scheme, the T-shaped connector can more stably connect the aluminum alloy main beam and the aluminum alloy cross beam.

[0012] Further, the inside of each positioning hole four is provided with a positioning bolt two, the inside of each positioning hole five is provided with a positioning bolt one, the positioning bolt two is matched with the positioning hole one, and the positioning bolt one is matched with the positioning hole three.

[0013] Through the above scheme, the T-shaped connector can be flexibly and stably installed and positioned at a suitable position on the aluminum alloy main beam.

[0014] Further, the bottom of the aluminum alloy girder is fixedly connected with a base, and the base is rotatably connected with a spiral anchor on both sides.

[0015] Through the above scheme, the aluminum alloy girder can be conveniently and stably positioned on the ground, ensuring the stability of the positioning of the aluminum alloy girder, and no longer needing pre-buried work.

[0016] Further, the smooth section of the middle of the aluminum alloy cross beam is rotatably sleeved with a U-shaped connecting frame, and an L-shaped mounting plate is mounted at the top of the U-shaped connecting frame.

[0017] Through the above scheme, the U-shaped connecting frame can be rotated on the outer surface of the aluminum alloy cross beam, and then the L-shaped mounting plate is mounted on the U-shaped connecting frame, so that the orientation of the L-shaped mounting plate can be changed by the rotation of the U-shaped connecting frame, facilitating the subsequent installation of the photovoltaic panel.

[0018] Further, both ends of the top of the U-shaped connecting frame are provided with nuts, and the U-shaped connecting frame is fixedly connected with the L-shaped mounting plate through the nuts.

[0019] Through the above scheme, the L-shaped mounting plate can be flexibly positioned and mounted on the aluminum alloy cross beam, and the direction of the L-shaped mounting plate can be adjusted, facilitating the installation of photovoltaic panels with different inclination angles.

[0020] Further, the inside of the L-shaped mounting plate is provided with four positioning bolts, and the outside of the L-shaped mounting plate is provided with an aluminum alloy mounting beam, and the outer surface of the aluminum alloy mounting beam is provided with uniformly distributed positioning holes and mounting grooves, and the L-shaped mounting plate is mounted on the aluminum alloy mounting beam through the positioning bolts.

[0021] Through the above scheme, the aluminum alloy mounting beam can be positioned and mounted between the two L-shaped mounting plates, and the photovoltaic panel can be mounted on the aluminum alloy mounting beam through the mounting grooves provided on the surface of the aluminum alloy mounting beam.

[0022] Compared with the prior art, the technical scheme of the present application has the following beneficial effects:

[0023] The photovoltaic support mounting structure is made of aluminum alloy material, which significantly reduces the overall weight through its lightweight design, which means that transportation costs and installation costs are reduced, making it practical to apply in remote areas. The unique T-shaped connector and L-shaped corner code design gives the mounting structure great flexibility, allowing it to quickly adapt to various site conditions, greatly improving installation efficiency. At the same time, the T-shaped connector and L-shaped corner code also ensure the precision and stability of the connection between the aluminum alloy girder and the cross beam, which realizes the uniform distribution of force between the aluminum alloy girder and the cross beam, effectively reduces local stress concentration, and prolongs the service life of the support. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a schematic view of the overall structure of the structure of the present application;

[0025] Figure 2 is a schematic view of the overall structure of the structure of the present application;

[0026] Figure 3 is a schematic view of the overall structure of the structure of the present application;

[0027] Figure 4 is a schematic view of the overall structure of the structure of the present application;

[0028] In the figure:

[0029] 1, aluminum alloy main beam; 2, positioning hole one; 3, positioning hole two; 4, positioning hole three; 5, T-shaped connector; 501, T-shaped plate; 502, vertical guide rail; 503, horizontal guide rail; 504, positioning hole four; 505, positioning hole five; 506, reinforcing plate; 507, vertical guide block; 508, horizontal guide block; 509, observation port; 510, positioning bolt one; 511, positioning bolt two; 6, L-shaped corner code; 7, positioning bolt three; 8, aluminum alloy cross beam; 9, positioning hole six; 10, horizontal groove; 11, base; 12, spiral anchor; 13, U-shaped connecting frame; 14, nut; 15, L-shaped mounting plate; 16, positioning bolt four; 17, aluminum alloy mounting beam; 18, positioning hole seven; 19, mounting groove. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0031] Please refer to Figure 1 , Figure 3 and Figure 4The photovoltaic support mounting structure in the embodiment comprises an aluminum alloy main beam 1, a T-shaped connector 5, an L-shaped corner code 6 and an aluminum alloy cross beam 8. The outer surface of the aluminum alloy main beam 1 is provided with uniformly distributed positioning hole one 2, positioning hole two 3 and positioning hole three 4. The T-shaped connector 5 is sleeved on the outer surface of the aluminum alloy main beam 1. The T-shaped connector 5 comprises a T-shaped plate 501 and a vertical guide rail 502 and a horizontal guide rail 503 fixedly connected to the outer surface of the T-shaped plate 501, and two reinforcing plates 506. The outer surfaces of the vertical guide rail 502 and the horizontal guide rail 503 are fixedly connected through the two reinforcing plates 506. The vertical guide rail 502 and the horizontal guide rail 503 can be used to conveniently and stably assemble and connect the aluminum alloy cross beam 8 and the aluminum alloy main beam 1. The reinforcing plate 506 can effectively improve the strength of the T-shaped connector 5. The T-shaped connector 5 is made of aluminum alloy, which is light in weight but high in strength, and does not significantly increase the total weight of the support. The T-shaped connector 5 is prefabricated in the factory, which avoids on-site welding or cutting and reduces labor and equipment costs. The outer surface of the T-shaped plate 501 is provided with two positioning hole four 504. The outer surface of the vertical guide rail 502 is provided with two positioning hole five 505. One end of the aluminum alloy cross beam 8 is sleeved on the inner wall of the horizontal guide rail 503. The outer surface of the T-shaped plate 501 is provided with an observation port 509.

[0032] It should be noted that the observation port 509 can be used to conveniently observe the position of the T-shaped connector 5 installed on the aluminum alloy main beam 1, so that the T-shaped connector 5 can be more accurately installed on the aluminum alloy main beam 1. The two ends of the aluminum alloy cross beam 8 are provided with positioning hole six 9 and horizontal groove 10. The L-shaped corner code 6 is provided with positioning bolt three 7 on both sides. The L-shaped corner code 6 is connected to one end of the aluminum alloy cross beam 8 through the positioning bolt three 7 and the positioning hole six 9, and the positioning bolt three 7 is matched with the positioning hole three 4. The positioning bolt three 7 can be used to stably connect the L-shaped corner code 6 between the aluminum alloy main beam 1 and the aluminum alloy cross beam 8, reinforce the connection between the aluminum alloy main beam 1 and the aluminum alloy cross beam 8, and conveniently install the L-shaped corner code 6 between the aluminum alloy main beam 1 and the aluminum alloy cross beam 8 through the T-shaped connector 5. During installation, the staff no longer needs to hold the other end of the aluminum alloy cross beam 8, so that the vertical installation and connection of the aluminum alloy cross beam 8 and the aluminum alloy main beam 1 can be realized.

[0033] Please refer to Figure 1 , Figure 3 and Figure 4The inner wall of the T-shaped plate 501 is fixedly connected with a vertical guide block 507 and a transverse guide block 508, the vertical guide block 507 is sleeved on the inner wall of the aluminum alloy main beam 1, and the transverse guide block 508 is sleeved on the inner wall of the transverse groove 10. The vertical guide block 507 and the transverse guide block 508 can more conveniently connect the aluminum alloy main beam 1 and the aluminum alloy cross beam 8 through the T-shaped connector 5, optimize the installation process, and improve the installation accuracy. The inside of each positioning hole four 504 is provided with a positioning bolt two 511, and the inside of each positioning hole five 505 is provided with a positioning bolt one 510. The positioning bolt two 511 is matched with the positioning hole one 2, and the positioning bolt one 510 is matched with the positioning hole three 4. The T-shaped connector 5 can be stably installed and positioned at a suitable position of the aluminum alloy main beam 1 by respectively tightening the positioning bolt one 510 and the positioning bolt two 511, and the subsequent accurate installation of the assembly is facilitated.

[0034] Please refer to Figure 1 , Figure 2 and Figure 3 The bottom of the aluminum alloy main beam 1 is fixedly connected with a base 11, and the two sides of the base 11 are rotatably connected with screw anchors 12. The base 11 and the screw anchors 12 can cooperate with each other to conveniently and stably position the aluminum alloy main beam 1 on the ground, ensure the stability of the positioning of the aluminum alloy main beam 1, and no longer need pre-buried work, so that the installation process is more convenient. The smooth section of the middle of the aluminum alloy cross beam 8 is rotatably sleeved with a U-shaped connecting frame 13, the top of the U-shaped connecting frame 13 is provided with an L-shaped mounting plate 15, the U-shaped connecting frame 13 can rotate on the outer surface of the aluminum alloy cross beam 8, then the L-shaped mounting plate 15 is installed on the U-shaped connecting frame 13, the orientation of the L-shaped mounting plate 15 can be changed through the rotation of the U-shaped connecting frame 13, the subsequent installation of the photovoltaic panel is facilitated, the two ends of the top of the U-shaped connecting frame 13 are provided with nuts 14, the U-shaped connecting frame 13 is fixedly connected with the L-shaped mounting plate 15 through the nuts 14, the L-shaped mounting plate 15 can be flexibly positioned and installed on the aluminum alloy cross beam 8, and the direction of the L-shaped mounting plate 15 can be adjusted, so that photovoltaic panels with different inclination angles can be installed, the inside of the L-shaped mounting plate 15 is provided with a positioning bolt four 16, the outside of the L-shaped mounting plate 15 is provided with an aluminum alloy mounting beam 17, the outer surface of the aluminum alloy mounting beam 17 is provided with uniformly distributed positioning holes seven 18 and mounting grooves 19, the L-shaped mounting plate 15 is installed in the positioning holes seven 18 on the surface of the aluminum alloy mounting beam 17 through the positioning bolt four 16, the aluminum alloy mounting beam 17 can be positioned and installed between the two L-shaped mounting plates 15, and the photovoltaic panel can be installed on the aluminum alloy mounting beam 17 through the mounting grooves 19 on the surface of the aluminum alloy mounting beam 17.

[0035] It should be noted that the main components of the device are made of aluminum alloy material, which significantly reduces the overall weight of the photovoltaic support, reduces transportation costs and installation costs, and makes it possible to be applied in remote areas.

[0036] The photovoltaic support installation structure in the embodiment is made of aluminum alloy material, which significantly reduces the overall weight of the photovoltaic support, reduces transportation costs and installation costs, and makes it possible to be applied in remote areas. The unique T-shaped connector 5 and L-shaped corner code 6 design endows the installation structure with great flexibility, which can quickly adapt to different site conditions and improve installation efficiency. At the same time, the T-shaped connector 5 and L-shaped corner code 6 can also ensure the accuracy and stability of the connection between the aluminum alloy main beam 1 and the aluminum alloy cross beam 8, so that the stress of the aluminum alloy main beam 1 and the aluminum alloy cross beam 8 is evenly distributed, reducing local stress concentration and prolonging the service life of the support.

[0037] The working principle of the above embodiment is as follows: first, the aluminum alloy main beam 1 is positioned at a suitable position by the base 11 and the spiral anchor 12, then the T-shaped connector 5 is sleeved on the outer surface of the aluminum alloy main beam 1 from the top end of the aluminum alloy main beam 1, then the T-shaped connector 5 is adjusted to a suitable height, then the positioning bolt one 510 is tightened in the corresponding positioning hole three 4, and the positioning bolt two 511 is tightened in the corresponding positioning hole one 2, completing the limiting installation of the T-shaped connector 5, then one end of the aluminum alloy cross beam 8 is sleeved in the horizontal guide rail 503, and the one end of the aluminum alloy cross beam 8 is in contact with the outer surface of the aluminum alloy main beam 1, so that the T-shaped connector 5 can support the aluminum alloy cross beam 8 and ensure that the aluminum alloy cross beam 8 can be installed vertically on one side of the aluminum alloy main beam 1, then the two L-shaped corner codes 6 are installed between the aluminum alloy main beam 1 and the aluminum alloy cross beam 8 by the positioning bolt three 7 and the positioning hole two 3 to position and connect the aluminum alloy main beam 1 and the aluminum alloy cross beam 8, then another aluminum alloy main beam 1 and T-shaped connector 5 are installed on the other side of the aluminum alloy cross beam 8 according to the above steps, that is, the installation work of the first group of supports is completed, then the second group of supports is positioned and installed at a suitable distance according to the above steps, then a plurality of U-shaped connecting frames 13 are installed on the aluminum alloy cross beam 8 in sequence, and the U-shaped connecting frames 13 are positioned on the aluminum alloy cross beam 8 by the nut 14 and the L-shaped mounting plate 15, then the two ends of the aluminum alloy mounting beam 17 are connected with the corresponding L-shaped mounting plate 15 by the positioning bolt four 16 and the positioning hole seven 18, that is, the state shown in Figure 1 The last step is to install the photovoltaic panel on the aluminum alloy mounting beam 17 through the installation slot 19. The whole process is simple to operate, and the T-shaped connector 5 and L-shaped corner code 6 can effectively ensure the stability and accuracy of the installation between the aluminum alloy main beam 1 and the aluminum alloy cross beam 8, effectively avoiding uneven stress, making the structure more practical.

[0038] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the enclosed claims. That is, although the present application is described in terms of particular embodiments and illustrative figures, it should be apparent that the application can be varied in a multitude of ways. Such alterations, many of which will be apparent to those skilled in the art, can be based on current technology, and as such, this application should not be limited to the particular embodiments described herein, but should be understood to include all embodiments that are within the scope of the appended claims and their equivalents.

[0039] While the embodiments of the application have been shown and described herein, it will be understood by those skilled in the art that many changes, modifications, substitutions and alterations to these embodiments can be made without departing from the principles and spirits of the application, which can be limited only by the scope of the appended claims and their equivalents.

Claims

1. A photovoltaic mounting structure comprising an aluminum alloy main beam (1), a T-shaped connector (5), an L-shaped corner code (6) and an aluminum alloy cross beam (8), characterized in that: The outer surface of the aluminum alloy main beam (1) is provided with uniformly distributed positioning hole one (2), positioning hole two (3) and positioning hole three (4), the T-shaped connector (5) is sleeved on the outer surface of the aluminum alloy main beam (1), the T-shaped connector (5) comprises a T-shaped plate (501), a vertical guide rail (502) and a horizontal guide rail (503) fixedly connected to the outer surface of the T-shaped plate (501), and two reinforcing plates (506), the outer surfaces of the vertical guide rail (502) and the horizontal guide rail (503) are fixedly connected by the two reinforcing plates (506), respectively, two positioning hole four (504) are formed in the outer surface of the T-shaped plate (501), two positioning hole five (505) are formed in the outer surface of the vertical guide rail (502), one end of the aluminum alloy cross beam (8) is sleeved on the inner wall of the horizontal guide rail (503), and an observation port (509) is formed in the outer surface of the T-shaped plate (501).

2. A photovoltaic racking installation structure according to claim 1, wherein: The two ends of the aluminum alloy cross beam (8) are provided with positioning hole six (9) and horizontal slot (10), the two sides of the L-shaped corner code (6) are provided with positioning bolt three (7), the L-shaped corner code (6) is connected to one end of the aluminum alloy cross beam (8) through the positioning bolt three (7) and the positioning hole six (9), and the positioning bolt three (7) is matched with the positioning hole three (4).

3. A photovoltaic racking installation structure according to claim 2, wherein: The inner wall of the T-shaped plate (501) is fixedly connected with a vertical guide block (507) and a horizontal guide block (508), the vertical guide block (507) is sleeved on the inner wall of the aluminum alloy main beam (1), and the horizontal guide block (508) is sleeved on the inner wall of the horizontal slot (10).

4. A photovoltaic mount structure according to claim 1, wherein: The inner part of each positioning hole four (504) is provided with a positioning bolt two (511), and the inner part of each positioning hole five (505) is provided with a positioning bolt one (510), the positioning bolt two (511) is matched with the positioning hole one (2), and the positioning bolt one (510) is matched with the positioning hole three (4).

5. A photovoltaic mount structure according to claim 1, wherein: The bottom of the aluminum alloy main beam (1) is fixedly connected with a base (11), and the two sides of the base (11) are rotatably connected with a spiral anchor (12).

6. A photovoltaic mount structure according to claim 1, wherein: The smooth section of the middle part of the aluminum alloy cross beam (8) is rotatably sleeved with a U-shaped connecting frame (13), and the top of the U-shaped connecting frame (13) is provided with an L-shaped mounting plate (15).

7. A photovoltaic mount structure according to claim 1, wherein: The two ends of the top of the U-shaped connecting frame (13) are provided with nuts (14), and the U-shaped connecting frame (13) is fixedly connected with the L-shaped mounting plate (15) through the nuts (14).

8. A photovoltaic mount structure according to claim 1, wherein: The inner part of the L-shaped mounting plate (15) is provided with a positioning bolt four (16), the outer part of the L-shaped mounting plate (15) is provided with an aluminum alloy mounting beam (17), the outer surface of the aluminum alloy mounting beam (17) is provided with uniformly distributed positioning hole seven (18) and mounting slot (19), and the L-shaped mounting plate (15) is mounted on the aluminum alloy mounting beam (17) through the positioning bolt four (16).