Photovoltaic module mounting bracket and roof photovoltaic system

Abstract

The invention discloses a photovoltaic assembly mounting bracket and a roof photovoltaic system, the photovoltaic assembly mounting bracket comprises a plurality of support frames and photovoltaic panels, adjusting assemblies arranged between the support frames and the photovoltaic panels are controlled by a control system, and the control system comprises a temperature detection module, an illumination monitoring module and an alarm unit; the alarm unit comprises an alarm. The adjusting assembly comprises a rotary adjusting frame and an angle adjusting sliding rail, the rotary adjusting frame and the angle adjusting sliding rail are rotatably installed on the supporting frame and are coaxially arranged, a plate frame is hinged to the rotary adjusting frame, a photovoltaic panel is installed on the plate frame, an angle adjusting sliding block is installed on the angle adjusting sliding rail in a sliding mode, and the photovoltaic panel is installed on the angle adjusting sliding block. A plate frame is hinged to the angle adjusting sliding block through an angle adjusting rod. According to the technical scheme, rotation adjustment in two directions can be met, the sun position from morning to evening is followed through rotation of the rotation adjustment frame and the angle adjustment sliding rail, meanwhile, the angle of the plate frame is adjusted to adapt to the height of the sun, and the power generation efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic panel technology, and in particular to a photovoltaic module mounting bracket and a rooftop photovoltaic system. Background Technology

[0002] Photovoltaic module mounting brackets are key structural components in solar photovoltaic (PV) power generation systems, used to fix and support photovoltaic panels. Their performance directly affects the installation stability, power generation efficiency, and system lifespan. In rooftop PV systems, brackets need to adapt to different roof types (such as pitched roofs and flat roofs) and complex installation environments. Currently, common rooftop PV brackets on the market mainly include fixed, seasonally adjustable, and a small number of single-axis tracking brackets. Fixed brackets are simple in structure and low in cost, but once the installation tilt and azimuth angles are set, they cannot be changed. They cannot adapt to the sun's positional changes at different times of the day and at different seasons throughout the year, causing the PV modules to not continuously receive solar radiation at the optimal angle, significantly reducing the system's annual power generation. Seasonally adjustable brackets allow users to manually adjust the tilt angle several times according to seasonal changes, improving the average annual power generation efficiency to some extent, but still cannot solve the energy loss caused by daily changes in the sun's azimuth angle. Although dual-axis tracking brackets used in large ground power plants can achieve real-time automatic tracking of azimuth and elevation angles to maximize power generation, they are complex in structure, expensive, require high maintenance, and are often large in size and weight, making it difficult to adapt to the load-bearing limitations, space constraints, and economic requirements of ordinary residential or commercial roofs.

[0003] Therefore, existing photovoltaic (PV) mounting brackets commonly used in rooftop applications either only allow for fixed angle adjustments or limited, non-real-time tilt adjustments. Both lack an effective mechanism for simultaneously, reliably, and conveniently adjusting the azimuth and elevation angles of PV modules within the limited space and load-bearing capacity of a rooftop. This makes it impossible to track changes in the sun's position and altitude in real time to maximize power generation. This lack of adjustment capability is one of the key technological bottlenecks restricting further improvements in the power generation efficiency and return on investment of rooftop PV systems. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention discloses a photovoltaic module mounting bracket, comprising a support frame, an adjustment component mounted on the support frame, and a photovoltaic panel mounted on the adjustment component. The adjustment component comprises a rotating adjustment frame and an angle adjustment slide rail, both rotatably mounted on the support frame and coaxially arranged. A panel frame is hinged to the rotating adjustment frame, and the photovoltaic panel is mounted on the panel frame. An angle adjustment slider is slidably mounted on the angle adjustment slide rail, and the panel frame is hinged to the angle adjustment slider via an angle adjustment rod. This technical solution allows for rotational adjustment in two directions. By rotating the rotating adjustment frame and the angle adjustment slide rail, the photovoltaic panel can follow the sun's position from morning to night, while simultaneously adjusting the angle of the panel frame to adapt to the sun's altitude, thereby improving power generation efficiency.

[0005] Furthermore, the plate frame is provided with angular connecting ears, and an arc-shaped base plate is fixedly installed at the bottom end of the angular connecting ears. The arc-shaped base plate is in contact with the upper part of the support frame and can rotate.

[0006] Furthermore, one end of the angle adjusting slide rail is equipped with an angle adjusting electric cylinder, the output end of the angle adjusting electric cylinder drives the angle adjusting slider to move, a connecting rivet is slidably mounted on the angle adjusting slider, a through hole is provided on the angle adjusting slider, and a drive shaft is fixedly mounted on the output end of the angle adjusting electric cylinder, the drive shaft passes through the through hole and abuts against the connecting rod.

[0007] Furthermore, the drive shaft end is provided with a plug hole, the connecting rod is fixedly equipped with a plug connector, and a plug spring is fixedly installed between the angle adjustment slider and the connecting rod. Through the above technical solution, when encountering strong winds, the photovoltaic panel moves upward, and the angle adjustment rod drives the connector and angle adjustment slider to move actively. At this time, the plug connector on the connecting rod leaves the plug hole, and then retracts due to the action of the plug spring. When the wind stops, the angle adjustment slider slides down the drive shaft to the lowest angle under the gravity of the photovoltaic panel. Strong winds are generally intermittent; after a certain degree of separation, the frame and photovoltaic panel return to their lowest position, making them less susceptible to damage when strong winds resume.

[0008] Furthermore, a reset rod is hinged to one end of the angle adjustment slide rail, a reset torsion spring is installed at the hinge of the reset rod, and an inclined surface is provided at the end of the reset rod. The end of the connecting rod pushes the reset rod by contacting the inclined surface.

[0009] Furthermore, a spherical head is fixedly mounted at the end of the connecting rod. The spherical head contacts the inclined surface and slides against the side of the reset rod. Through this technical solution, when the angle adjustment slider retracts, the reset rod presses against the spherical head and the connecting rod, causing them to tend to return to their original positions. After the angle adjustment cylinder retracts, the connecting rod no longer presses against the drive shaft and returns to its original position. The drive shaft then pushes out and moves through the insertion hole, locking the connector and adjusting the angle of the photovoltaic panel.

[0010] Furthermore, the support frame is equipped with a conduit containing cables that connect to the photovoltaic panel. A sealing box is fixedly mounted on the support frame, and two hinge plates are hinged inside the sealing box. A shearing blade is provided at the first end of the hinge plate, and a lifting line is fixedly mounted at the second end of the hinge plate, which is connected to the bottom of the panel frame.

[0011] Furthermore, a sealing plate is fixedly mounted on the hinge plate. When the two shear blades cut the cable, the two sealing plates seal the sealing box. Through this technical solution, in extreme weather conditions, the frame is easily blown off the roof, potentially breaking the power lines and exposing the wire ends, which could easily lead to danger. In this situation, by pulling the hinge plate with a lifting cable, the shear blades can cut the wires and provide protection, greatly improving safety performance.

[0012] The present invention also discloses a rooftop photovoltaic system, including a photovoltaic module mounting bracket. An adjustment component disposed between the support bracket and the photovoltaic panel is controlled by a control system. The control system includes a temperature detection module, a light monitoring module, and an alarm unit; the alarm unit includes an alarm.

[0013] The advantages of this invention compared to the prior art are: (1) The technical solution of the present invention can satisfy the rotation adjustment in two directions. The rotation adjustment frame and the angle adjustment slide rail follow the position of the sun from morning to night. At the same time, the angle of the plate frame is adjusted to adapt to the height of the sun, thereby improving the power generation efficiency.

[0014] (2) Through the technical solution of the present invention, when encountering strong winds, the photovoltaic panel moves upward and the connecting head and the angle adjustment slider move actively through the angle adjustment rod. At this time, the plug on the connecting rod leaves the plug hole and retracts through the plug spring. When the wind stops, the angle adjustment slider slides on the drive shaft to the lowest angle under the gravity of the photovoltaic panel. Strong winds are usually gusts. When the separation reaches a certain degree, the frame and photovoltaic panel return to the lowest position. When strong winds rise again, they are not easily damaged.

[0015] (3) Through the technical solution of the present invention, when the angle adjustment slider retracts, the spherical head and the connecting rod are squeezed by the reset rod. The connecting rod and the spherical head tend to return to their original positions. After the angle adjustment electric cylinder retracts, the connecting rod no longer presses against the drive shaft and returns to its original position. When the drive shaft pushes out again, it will move through the plug hole to lock the plug connector and adjust the angle of the photovoltaic panel.

[0016] (4) Through the technical solution of the present invention, when encountering extreme weather, the frame is easily blown off the roof. At this time, the wire is broken and the wire ends are exposed, which can easily cause danger. At this time, by pulling the hinge plate with the lifting line, the shear blade cuts the line and protects it, which greatly improves the safety performance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of some components in an embodiment of the present invention.

[0019] Figure 3 for Figure 2 Enlarged diagram of point A in the middle.

[0020] Figure 4 This is a schematic diagram of the adjustment component in an embodiment of the present invention.

[0021] Figure 5 for Figure 4 Enlarged diagram of point C in the middle.

[0022] Figure 6 This is a schematic diagram of the shape of the angle adjustment slider in an embodiment of the present invention.

[0023] Figure 7 This is a schematic diagram of the adjustment component according to an embodiment of the present invention.

[0024] Figure 8 for Figure 7 Enlarged diagram of point B in the middle.

[0025] Figure 9 This is a partial structural diagram of an embodiment of the present invention.

[0026] Figure 10 This is a schematic diagram of the shape of the hinge plate according to an embodiment of the present invention.

[0027] Reference numerals: 1-Support frame; 2-Photovoltaic panel; 3-Support foot; 4-Rotary adjustment motor; 5-Rotary adjustment frame; 6-Plate frame; 7-Adjustment shaft; 8-Angle adjustment slide rail; 9-Angle adjustment slider; 10-Fork-shaped connector; 11-Angle adjustment rod; 12-Angle connecting ear; 13-Arc-shaped base plate; 14-Connecting rivet; 15-Connecting shaft; 16-Angle adjustment electric cylinder; 17-Reset rod; 18-Reset torsion spring; 19-Inclined surface; 20-Connector; 21-Plug-in connector; 22-Plug-in hole; 23-Drive shaft; 24-Connecting rod; 25-Plug-in spring; 26-Spherical head; 27-Sealing box; 28-Cable; 29-Conduit; 30-Hinge plate; 31-Lifting line; 32-Sealing plate; 33-Shearing blade. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] like Figures 1-10 As shown, a photovoltaic module mounting bracket includes a support frame 1, an adjustment component mounted on the support frame 1, and a photovoltaic panel 2 mounted on the adjustment component. Support feet 3 are fixedly mounted at the four corners of the support frame 1 for support. By setting support feet 3 of different lengths, the angle of the photovoltaic panel 2 in its initial state can be adjusted. The adjustment component is used to change the angle of the photovoltaic panel 2 according to the solar altitude and the changes in the solar position throughout the day to ensure maximum power generation. The adjustment component includes a rotating adjustment frame 5 and an angle adjustment slide rail 8, both of which are rotatably mounted on the support frame 1 and coaxially arranged. A rotating adjustment motor 4 is fixedly mounted on the inner side of the support frame 1. The rotating shaft of the rotating adjustment motor 4 is fixedly connected to the rotating adjustment frame 5, driving the rotating adjustment frame 5 to rotate. The rotating adjustment frame 5 is U-shaped, with rotating shafts at both ends for connecting to a panel frame 6. The photovoltaic panel 2 is laid on the panel frame 6. The hinged frame 6 allows for angle adjustment to adapt to the sun's altitude. An angle adjustment slider 9 is slidably mounted on the angle adjustment rail 8. The angle adjustment rail 8 has openings on both sides, and the angle adjustment slider 9 has protruding long blocks on both sides that move within the openings. The angle adjustment slider 9 is hinged to the plate 30 via the angle adjustment rod 11. Specifically, a connector 20 is fixedly mounted on the angle adjustment slider 9, and a through hole is provided on the connector 20. The angle adjustment rod 11 is hinged to the through hole via a short shaft. A fork-shaped connector 10 is fixedly mounted at the lower end of the angle adjustment rod 11, and the fork-shaped connector 10 is hinged to the connector 20. A connecting shaft 15 is fixedly mounted at the top of the angle adjustment rod 11. Through the above technical solution, rotational adjustment in two directions can be achieved. By rotating the adjustment frame 5 and the angle adjustment rail 8, the rotation follows the sun's position from morning to night, while simultaneously adjusting the angle of the frame 6 to adapt to the sun's altitude, thus improving power generation efficiency.

[0030] In this embodiment, the plate frame 6 is provided with an angle connecting lug 12. The angle connecting lug 12 has a through hole and is hinged to the connecting shaft 15. Thus, the angle of the plate frame 6 can be adjusted by moving the position of the angle adjusting slider 9. When the connecting shaft 15 is in the lowest position, its height is lower than the hinge point between the rotating adjustment frame 5 and the plate frame 6. As the angle adjusting slider 9 moves, the connecting shaft 15 gradually rises. The bottom end of the angle connecting lug 12 is fixedly equipped with an arc-shaped base plate 13, which is in contact with the support frame 1 and can rotate. Thus, driving the rotary adjustment motor 4 can drive the rotary adjustment frame 5 to rotate. The rotation is achieved through the cooperation of the angle adjusting slide rail 8. The angle adjusting slide rail 8 is fixedly equipped with an adjusting shaft 7, which is hinged to the support frame 1. Specifically, the adjusting shaft 7 is coaxially arranged with the rotating shaft of the rotary adjustment motor 4.

[0031] In this embodiment, an angle-adjusting electric cylinder 16 is installed at one end of the angle-adjusting slide rail 8. The output end of the angle-adjusting electric cylinder 16 drives the angle-adjusting slider 9 to move. A connecting rivet 14 is slidably mounted on the angle-adjusting slider 9. A through hole is provided on the angle-adjusting slider 9. A drive shaft 23 is fixedly mounted at the output end of the angle-adjusting electric cylinder 16. The drive shaft 23 passes through the through hole and abuts against the connecting rod 24. A plug hole 22 is provided at the end of the drive shaft 23. A plug connector 21 is fixedly mounted on the connecting rod 24. A plug spring 25 is fixedly mounted between the angle-adjusting slider 9 and the connecting rod 24. When the connector 21 is inserted into the connector hole 22, the connector spring 25 is in a stretched state and tends to retract. At this time, the angle adjustment cylinder 16 extends outward, which drives the angle adjustment slider 9 to move through the connecting rod 24. When the angle adjustment cylinder 16 drives the arc-shaped base plate 13 to retract, the photovoltaic panel 2 and the frame 6 press against the angle adjustment slider 9 and keep it close to follow the fall. However, in windy weather, the photovoltaic panel 2 moves upward. At this time, the angle adjustment slide rail 8 and the drive shaft 23 do not move, and the angle adjustment slider 9 moves actively. Through the angle adjustment rod 11, it drives the connector 20 and the angle adjustment slider 9 to move actively. At this time, the connector 21 on the connecting rod 24 leaves the connector hole 22 and retracts through the drive of the connector spring 25. When the wind stops... Under the weight of the photovoltaic panel 2, the angle adjustment slider 9 slides down to the lowest angle on the drive shaft 23. In windy weather, the wind is usually intermittent. When the separation reaches a certain degree, the frame 6 and the photovoltaic panel 2 return to the lowest position. The movement of the angle adjustment slider 9 can be controlled by setting the depth of the plug hole 22 and the length of the plug 21. When the wind is strong enough to drive the plug 21 away from the plug hole 22, the connecting rod 24 will retract. When the wind stops, the photovoltaic panel 2 and the frame 6 fall back, causing the angle adjustment slider 9 to slide along the drive shaft 23 and return to the position closest to the angle adjustment cylinder 16. A spring pin is set on the angle adjustment slide rail 8 near the angle adjustment cylinder 16 to lock the angle adjustment slider 9, so it is not easily damaged when strong winds occur again.

[0032] In this embodiment, a reset rod 17 is hinged to one end of the angle adjustment slide rail 8. A reset torsion spring 18 is installed at the hinge of the reset rod 17. An inclined surface 19 is provided at the end of the reset rod 17. The end of the connecting rod 24 pushes the reset rod 17 by contacting the inclined surface 19. A spherical head 26 is fixedly installed at the end of the connecting rod 24. The spherical head 26 contacts the inclined surface 19 and slides in contact with the side of the reset rod 17. When the angle adjustment slider 9 retracts, the reset rod 17 squeezes the spherical head 26 and the connecting rod 24. The connecting rod 24 and the spherical head 26 tend to return to their original positions. After the angle adjustment electric cylinder 16 retracts, the connecting rod 24 no longer presses against the drive shaft 23 and returns to its original position. The drive shaft 23 then pushes out and moves through the insertion hole 22 to lock the connector 21, thus adjusting the angle of the photovoltaic panel 2. In other words, when the angle adjustment slider 9 slides on the drive shaft 23, the ball head 26 first contacts the inclined surface 19 and pushes open the reset rod 17 through the inclined surface 19. The elastic force of the reset torsion spring 18 is greater than that of the plug spring 25. However, since the plug 21 is pressed against the drive shaft 23, it cannot move. Only the reset rod 17 can move. Finally, the angle adjustment slider 9 is stuck by the spring pin. In order to restore the original position, the angle adjustment electric cylinder 16 drives the drive shaft 23 to retract. When it retracts away from the angle adjustment slider 9, the plug 21 is no longer pressed against the drive shaft 23. It will be squeezed by the reset rod 17 and return the plug 21 to the middle position. When the angle adjustment electric cylinder 16 is activated again, the plug 21 can be stuck in the plug hole 22.

[0033] In this embodiment, the support frame 1 is equipped with a conduit 29, and a cable 28 is installed inside the conduit 29. The cable 28 is connected to the photovoltaic panel 2. A sealing box 27 is fixedly installed on the support frame 1. Two hinge plates 30 are hinged inside the sealing box 27. A shearing blade 33 is provided at the first end of the hinge plate 30, and a lifting line 31 is fixedly installed at the second end of the hinge plate 30. The lifting line 31 is connected to the bottom of the panel frame 6.

[0034] A sealing plate 32 is fixedly mounted on the hinge plate 30. When the two shear blades 33 cut the cable 28, the two sealing plates 32 seal the sealing box 27. Through the above technical solution, in the event of extreme weather, the frame 6 is easily blown off the roof. At this time, the power line is broken, and the wire end is exposed, which can easily cause danger. At this time, by pulling the hinge plate 30 with the lifting line 31, the shear blades 33 cut the line and protect it, which greatly improves the safety performance.

[0035] A rooftop photovoltaic system includes a photovoltaic module mounting bracket. An adjustment component disposed between the support frame 1 and the photovoltaic panel 2 is controlled by a control system. The control system includes a temperature detection module, a light monitoring module, and an alarm unit; the alarm unit includes an alarm.

[0036] The photovoltaic system includes a support frame 1 and photovoltaic panels 2 fixed on it. This adjustment component is centrally driven and controlled by an intelligent control system. This control system is based on a microprocessor, a programmable logic controller (PLC), and a dedicated solar tracking controller. It integrates a temperature detection module, temperature sensors attached to the back of the photovoltaic panels or key electrical nodes, and a light monitoring module. The light monitoring module includes an irradiance sensor for real-time monitoring of ambient light intensity, and a direction sensor and a solar position sensor for accurately detecting the actual position of the sun. These are typically implemented using an array of multiple precision photodiodes or a small camera combined with image recognition algorithms to collect environmental and system status data in real time. Based on this real-time data, the control system executes its core control strategy: First, it combines a built-in precise astronomical algorithm to calculate the theoretical solar altitude angle and azimuth angle based on the date, time, and geographical location. This data is then fused with the measured feedback from the direction sensor for position calibration to calculate the optimal angle that the photovoltaic panel 2 should currently reach. Second, it determines the light conditions based on the irradiance sensor data. If the tracking requirements are not met, the system will enter sleep or reverse tracking mode when the temperature falls below a set threshold to avoid shading or wasted energy. It will also utilize data from the temperature detection module for possible temperature compensation or overheat protection. Then, the core controller generates precise PWM or analog control signals to drive the elevation and azimuth adjustment motors to work in tandem, ensuring the photovoltaic panel 2 is aligned with the sun in real time to maximize light capture efficiency. Simultaneously, the system integrates multiple safety monitoring mechanisms, including real-time monitoring of the current, voltage, operating temperature, and mechanical limit switch status of each motor. If overload, stall, overheating, or angle exceeding limits is detected, an alarm unit consisting of alarms is immediately triggered, emitting audible and visual alarm signals and sending fault information to the remote monitoring platform via a communication interface for timely maintenance intervention. Furthermore, the control system typically features self-learning optimization, low-power operation mode, backwind protection, automatic component leveling in strong winds, and local / remote parameter configuration and status query functions to ensure efficient, stable, and reliable operation in complex rooftop environments.

[0037] Working Principle: Multiple support frames 1 and photovoltaic panels 2 are arranged on the roof, and the support frames 1 are fixed. The temperature detection unit monitors the time; when the temperature rises from low to high (morning), the rotating adjustment motor 4 drives the rotating adjustment frame 5 to rotate. The rotating adjustment frame 5 then drives the panel frame 6 to rotate, following the sun. However, around noon, the angle change is not limited to a single angle adjustment; depending on the season, the rotation of the panel frame 6 on the rotating adjustment frame 5 needs to be adjusted to adapt to changes in the sun's altitude and position. At this time, the angle adjustment cylinder 16 is activated, causing the angle adjustment slider 9 to extend. The angle adjustment slider 9 drives the connector 20, which in turn drives the angle adjustment rod 11. The angle adjustment rod 11 then drives the panel frame 6, causing it to rotate on the rotating adjustment frame 5, changing its angle to adapt to the sun's altitude. This process is completed by the temperature detection module. When the light monitoring module detects darkness, the panel frame 6 returns to its original position. Since the angle adjustment of the photovoltaic panels 2 installed on the roof is easily affected by wind, the angle of the panel frame 6 is increased during strong winds. Rod 11 moves the angle adjustment slider 9, eventually separating the connector 21 from the socket 22. At this point, the connector spring 25 returns to its original position, moving away from the drive shaft 23. When the wind stops, under the gravity of the photovoltaic panel 2 and the frame 6, the angle adjustment slider 9 slides on the drive shaft 23, returning to its lowest position and being locked by the spring pin (existing technology, not shown in this embodiment). At this point, the alarm sounds. The mechanical limit switch and tilt and azimuth encoder detect whether the component movement exceeds the physical travel range or the command angle deviation is too large. The vibration sensor detects abnormal mechanical vibration, triggering an alarm due to structural loosening or resonance caused by strong wind. After the wind stops, the reset unit is activated, allowing all angle adjustment cylinders 16 to return to their initial positions and then extend again. This will move the angle adjustment slider 9 again and push away the spring pin, allowing the angle adjustment slider 9 to move. The reset rod 17 clamps the connecting rod 24 in a position close to the middle. When the drive shaft 23 pushes the angle adjustment slider 9 again, the connector 21 is locked in the socket 22 again.

[0038] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A photovoltaic module mounting bracket comprising a support frame (1) having an adjustment assembly mounted thereon, the adjustment assembly having a photovoltaic panel (2) mounted thereon, characterised in that, The adjusting assembly comprises a rotating adjusting frame (5) and an angle adjusting slide rail (8), both of which are coaxially arranged and rotatably installed on the support frame (1), the rotating adjusting frame (5) is hingedly connected with a plate frame (6), the photovoltaic panel (2) is installed on the plate frame (6), the angle adjusting slide rail (8) is slidably connected with an angle adjusting slide block (9), and the angle adjusting slide block (9) is hingedly connected with a plate (30) through an angle adjusting rod (11).

2. A photovoltaic module mounting bracket according to claim 1, wherein, The plate frame (6) is provided with an angle connecting lug (12), the bottom end of the angle connecting lug (12) is fixedly connected with an arc-shaped bottom plate (13), and the arc-shaped bottom plate (13) is in contact with the upper surface of the support frame (1) and can rotate.

3. A photovoltaic module mounting bracket according to claim 2, wherein, One end of the angle adjusting slide rail (8) is provided with an angle adjusting electric cylinder (16), the output end of the angle adjusting electric cylinder (16) drives the angle adjusting slide block (9) to move, the angle adjusting slide block (9) is slidably connected with a connecting rivet (14), the angle adjusting slide block (9) is provided with a through hole, the output end of the angle adjusting electric cylinder (16) is fixedly connected with a driving shaft (23), and the driving shaft (23) penetrates through the through hole and abuts against a connecting rod (24).

4. A photovoltaic module mounting bracket according to claim 3, wherein, The end of the driving shaft (23) is provided with a plug-in hole (22), the connecting rod (24) is fixedly connected with a plug-in head (21), and the angle adjusting slide block (9) and the connecting rod (24) are fixedly connected with a plug-in spring (25).

5. A photovoltaic module mounting bracket according to claim 4, wherein, One end of the angle adjusting slide rail (8) is hingedly connected with a reset long rod (17), the hinged portion of the reset long rod (17) is provided with a reset torsional spring (18), the end of the reset long rod (17) is provided with an inclined surface (19), and the end of the connecting rod (24) pushes the reset long rod (17) by being in contact with the inclined surface (19).

6. A photovoltaic module mounting bracket according to claim 5, wherein, The end of the connecting rod (24) is fixedly connected with a spherical head (26), the spherical head (26) is in contact with the inclined surface (19) and slides with the side surface of the reset long rod (17).

7. A photovoltaic module mounting bracket according to claim 1, wherein The support frame (1) is provided with a wire tube (29), the wire tube (29) is internally connected with a wire cable (28), the wire cable (28) is connected with the photovoltaic panel (2), the support frame (1) is fixedly connected with a sealing box (27), two hinged plates (30) are hingedly connected in the sealing box (27), the first end of the hinged plate (30) is provided with a shearing cutter (33), the second end of the hinged plate (30) is fixedly connected with a pull line (31), and the pull line (31) is connected with the bottom of the plate frame (6).

8. A photovoltaic module mounting bracket according to claim 7, wherein, The hinged plate (30) is fixedly connected with a blocking plate (32), when the two shearing cutters (33) cut the wire cable (28), the two blocking plates (32) block the sealing box (27).

9. A rooftop photovoltaic system characterized by, The adjusting assembly arranged between the support frame (1) and the photovoltaic panel (2) is controlled by a control system, the control system comprises a temperature detection module, an illumination monitoring module and an alarm unit, and the alarm unit comprises an alarm.

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