A turnable protected roof photovoltaic system and method of use thereof

Abstract

The application discloses a roof photovoltaic system with reversible protection and a use method thereof, and relates to the technical field of photovoltaic construction.The roof photovoltaic system with reversible protection comprises a support and a photovoltaic panel arranged on the support, the support comprises two horizontal telescopic supports and two vertical telescopic supports, and the vertical telescopic supports are fixedly installed on the left side of the horizontal telescopic supports.The roof photovoltaic system with reversible protection and the use method thereof provide convenient conditions for the inclination angle adjustment of the mounting plate, that is, the installation angle of the photovoltaic panel is conveniently adjusted, the structure is stable, the use is more convenient, and the safety of the photovoltaic panel under harsh environments is effectively ensured, that is, the long-time effective service life of the photovoltaic panel is improved.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic construction technology, specifically to a rooftop photovoltaic system with reversible protection and its usage method. Background Technology

[0002] Solar panels are devices that absorb sunlight and convert solar radiation energy directly or indirectly into electrical energy through the photoelectric effect or photochemical effect. When used in buildings, they are often installed directly on the roof using brackets.

[0003] Conventional photovoltaic (PV) mounting brackets are often pre-welded and fixed, which can only assemble PV panels at a fixed angle. In practical applications, they cannot be easily adjusted to the required angle of the PV panels, and the lack of protection for the PV panels makes them prone to damage in severe weather. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a roof photovoltaic system with reversible protection and its usage method, which solves the problems that conventional photovoltaic panel brackets cannot easily adjust the angle of the photovoltaic panels and that the photovoltaic panels lack protection, making them prone to damage.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a roof photovoltaic system with reversible protection, comprising a bracket and photovoltaic panels mounted on the bracket. The bracket includes two horizontal telescopic frames and two vertical telescopic frames. The vertical telescopic frames are fixedly installed on the left side of the horizontal telescopic frames. The telescopic ends of the two vertical telescopic frames are jointly and fixedly connected to a U-shaped mounting frame. An mounting plate is rotatably installed between the front and rear sides of the inner cavity of the U-shaped mounting frame. The telescopic ends of the two horizontal telescopic frames are jointly and fixedly connected to a U-shaped frame. The bottom of the mounting plate is rotatably installed inside the U-shaped frame. The photovoltaic panels are embedded inside the mounting plate.

[0008] A lifting assembly is provided between the opposite sides of the telescopic ends of the two vertical telescopic frames. A baffle assembly is rotatably installed on the moving end of the lifting assembly. The top of the baffle assembly passes through the U-shaped assembly frame and extends to the top of the U-shaped assembly frame. An elastic pushing assembly is provided on the top of the U-shaped assembly frame.

[0009] The present invention is further configured such that: the horizontal telescopic frame includes a first fixed cylinder and a first top rod, the first top rod passes through and is slidably installed on the right side of the first fixed cylinder, and the first top rod and the first fixed cylinder are fixedly connected by bolts; the vertical telescopic frame includes a second fixed cylinder and a second top rod, the second top rod passes through and is slidably installed on the top of the second fixed cylinder.

[0010] The second fixed cylinder is fixedly installed on the left side of the first fixed cylinder, the two first top rods are fixedly installed on the front and rear sides of the left side of the U-shaped frame, and the two second top rods are fixedly installed on the front and rear sides of the bottom of the U-shaped assembly frame.

[0011] By adopting the above technical solution, the horizontal length and vertical height can be easily adjusted by utilizing the cooperation of the first fixed cylinder, the first top rod, the second fixed cylinder, and the second top rod. With the cooperation of the U-shaped assembly frame, the U-shaped frame, and the mounting plate, the tilt angle of the mounting plate can be adjusted simply by moving the first top rod. The bolts ensure that the positions of the first top rod and the first fixed cylinder are fixed. After the photovoltaic panel is embedded in the mounting plate, the tilt angle of the photovoltaic panel can be easily adjusted. The structure is simple and more convenient to use.

[0012] The invention is further configured such that: the lifting assembly includes a suspended plate, the suspended plate is fixedly installed between two second top rods via a connecting block, a drive box is fixedly connected to the bottom right side of the suspended plate, a drive motor is fixedly installed inside the drive box, an adjusting screw is fixedly connected to the output end of the drive motor via a coupling, the top end of the adjusting screw passes through the drive box and is rotatably connected to a stabilizing plate via a bearing, and the left side of the stabilizing plate is fixedly connected to the right side of the suspended plate, and a lifting plate is sleeved and threadedly connected to the outer surface of the adjusting screw.

[0013] The present invention is further configured such that: the baffle assembly includes an isolation box, a baffle is slidably installed inside the isolation box, and light-transmitting grooves are provided on the top of both the left and right sides of the isolation box;

[0014] The bottom of the isolation box is rotatably mounted on the top of the lifting plate via a rotating block, and the isolation box is positioned between the U-shaped assembly frame and the mounting plate.

[0015] The elastic pushing assembly includes a fixed plate, which is fixedly installed on the top of the U-shaped assembly frame. A push rod is slidably installed through the right side of the fixed plate. A push head is fixedly connected to the right end of the push rod. A spring is sleeved on the outer surface of the push rod. The two ends of the spring are fixedly connected to the push head and the side opposite to the fixed plate, respectively. The right side of the push head is in sliding contact with the left side of the isolation box.

[0016] By adopting the above technical solution, the isolation box can be raised and lowered by using a drive motor, adjusting screw, and lifting plate. The U-shaped assembly frame and mounting plate limit the position of the isolation box. With the help of the elastic pushing components, the isolation box tilts towards the photovoltaic panel as it rises, until it completely covers the panel. The light-transmitting groove ensures that the photovoltaic panel can effectively absorb and convert sunlight while the isolation box is vertical. With the help of the baffle, after the isolation box covers the photovoltaic panel, the baffle slides down inside the isolation box to block the light-transmitting groove, thus achieving complete coverage of the photovoltaic panel and effectively protecting it in harsh environments.

[0017] The invention is further configured such that: a water tank is fixedly connected to the top of both first fixed cylinders; one side of the water tank passes through the U-shaped frame and extends to the right side of the U-shaped frame; a water inlet is provided on the right side of the top of the water tank and below the mounting plate; a baffle plate is fixedly installed on the top of the inner cavity of the water tank and to the left of the water inlet; a filter screen is fixedly connected between the bottom of the baffle plate and the bottom of the inner cavity of the water tank; and a perforated float plate is slidably installed between the baffle plate and the right side of the inner cavity of the water tank.

[0018] The invention is further configured such that: a water pump is fixedly connected to the top of the water tank, the water pump is fixedly installed on the top of the water tank, the input end of the water pump is connected to a water inlet pipe, one end of the water inlet pipe passes through the water tank and extends into the interior of the water tank, a water spray pipe is fixedly installed on the top of the U-shaped assembly frame through a connecting frame, a plurality of cleaning pipes are evenly spaced on the surface of the water spray pipe, and a flexible hose is connected to the output end of the water pump, with one end of the flexible hose connected to one end of the water spray pipe.

[0019] The invention is further configured such that: an overflow pipe is connected to the back of the water tank, and a trigger button is fixedly installed at the top of the inner cavity of the water tank and above the perforated float plate, and the trigger button is used in conjunction with the water pump.

[0020] By adopting the above technical solution, while rainwater is collected by the water tank, in the event of heavy rainfall, the perforated floating plate rises continuously and squeezes the trigger button, which then starts the water pump. The water pump then draws water out of the water tank and sprays it out through the hose, spray pipe and inclined pipe in sequence to wash the surface of the photovoltaic panel and ensure the cleanliness of the photovoltaic panel surface.

[0021] This invention also discloses a method for using a roof photovoltaic system with reversible protection, specifically including the following steps:

[0022] Step 1, Photovoltaic Installation: Embed the photovoltaic panel into the mounting plate, place the first fixing cylinder on the horizontal roof, pull the U-shaped frame to move the first top rod in the first fixing cylinder, causing the mounting plate to tilt at a different angle. During the process, the mounting plate drives the U-shaped assembly frame to slide the second top rod in the second fixing cylinder. After adjusting the photovoltaic panel to the required installation angle, tighten the bolts to fix the first top rod and the first fixing cylinder.

[0023] Step 2, Rain Trigger: During rainy weather, rainwater falls into the inlet through the installation plate, passes through the perforated float and filter screen, and is stored in the water tank. As the water level increases, the perforated float rises until the trigger button is pressed. At this time, the water pump starts and pumps water from the tank to the hose through the inlet pipe. The water then sprays out from the cleaning pipe through the spray pipe and passes through the light-transmitting groove to rinse the surface of the photovoltaic panel.

[0024] Step 3, Shading Protection: After the water pump operates for the set time in Step 2, the water pump is turned off, and the drive motor is started. The drive motor drives the adjusting screw to rotate, causing the lifting plate to move the isolation box upward along the U-shaped assembly frame. During the upward movement of the isolation box, the spring pushes the isolation box to tilt towards the side of the mounting plate until the isolation box moves above the U-shaped assembly frame, covering the mounting plate and shading the photovoltaic panel. During this process, the baffle slides downward in the isolation box to block the light transmission groove and shading the photovoltaic panel.

[0025] (III) Beneficial Effects

[0026] This invention provides a roof photovoltaic system with reversible protection and its usage method. It has the following beneficial effects:

[0027] (1) This invention provides convenient conditions for adjusting the tilt angle of the mounting plate by cooperating with the horizontal telescopic frame, the vertical telescopic frame, the U-shaped assembly frame, the U-shaped frame and the mounting plate. This makes it easy to adjust the installation angle of the photovoltaic panel. The structure is stable and more convenient to use. With the cooperation of the lifting component and the baffle component, the lifting component drives the baffle component to move up and down, thereby controlling whether the baffle component covers the photovoltaic panel. This effectively ensures the safety of the photovoltaic panel in harsh environments, thus improving the long-term effective service life of the photovoltaic panel.

[0028] (2) This invention utilizes the cooperation of the first fixed cylinder, the first top rod, the second fixed cylinder, and the second top rod to achieve convenient adjustment of the horizontal length and vertical height. With the cooperation of the U-shaped assembly frame, the U-shaped frame, and the mounting plate, the tilt angle of the mounting plate can be adjusted simply by moving the first top rod. With the setting of bolts, the positions of the first top rod and the first fixed cylinder are fixed. After the photovoltaic panel is embedded in the mounting plate, the tilt angle of the photovoltaic panel can be conveniently adjusted. The structure is simple and it is more convenient to use.

[0029] (3) This invention utilizes the combined configuration of a drive motor, adjusting screw, and lifting plate to achieve the lifting and adjustment of the isolation box. With the addition of a U-shaped assembly frame and mounting plate, the position of the isolation box is limited. With the cooperation of the elastic pushing component, the isolation box can tilt towards the photovoltaic panel as it rises until it completely covers the photovoltaic panel. Furthermore, with the setting of the light-transmitting groove, the photovoltaic panel can effectively absorb and convert sunlight when the isolation box is vertical. With the cooperation of the baffle, after the isolation box covers the photovoltaic panel, the baffle can slide down in the isolation box to block the light-transmitting groove, thereby achieving complete coverage of the photovoltaic panel and ensuring effective protection of the photovoltaic panel in harsh environments.

[0030] (4) In this invention, while rainwater is collected by a water tank, the perforated floating plate rises continuously in heavy rain to press the trigger button, which then starts the water pump. The water pump then draws water out of the water tank and sprays it out through a hose, a spray pipe and an inclined pipe to wash the surface of the photovoltaic panel and ensure the cleanliness of the photovoltaic panel surface. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0033] Figure 3 This is a schematic diagram showing the connection between the hanging plate and the two second top rod structures of the present invention;

[0034] Figure 4 This is a top view of the internal structure of the isolation box of the present invention;

[0035] Figure 5 For the present invention Figure 2 Enlarged schematic diagram of the structure at point A;

[0036] In the diagram, 1. Support frame; 2. Photovoltaic panel; 3. Horizontal telescopic frame; 4. Vertical telescopic frame; 5. U-shaped assembly frame; 6. Mounting plate; 7. U-shaped frame; 8. Lifting assembly; 9. Baffle assembly; 10. Elastic pushing assembly; 11. First fixed cylinder; 12. First top rod; 13. Bolt; 14. Second fixed cylinder; 15. Second top rod; 16. Hanging plate; 17. Drive box; 18. Drive motor; 19. Adjusting screw. 20. Stabilizing plate; 21. Lifting plate; 22. Isolation box; 23. Baffle; 24. Light-transmitting groove; 25. Fixing plate; 26. Push rod; 27. Push head; 28. Spring; 29. ​​Water tank; 30. Water inlet; 31. Filter screen; 32. Perforated float; 33. Water pump; 34. Water inlet pipe; 35. Spray pipe; 36. Cleaning pipe; 37. Hose; 38. Overflow pipe; 39. Trigger button; 40. Barrier plate. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0038] Please see Figure 1-5 The present invention provides the following technical solutions:

[0039] Example 1

[0040] A roof photovoltaic system with reversible protection includes a support frame 1 and photovoltaic panels 2 mounted on the support frame 1.

[0041] As a preferred embodiment, in order to facilitate the adjustment of the tilt angle of the photovoltaic panel 2 during installation, the bracket 1 includes two horizontal telescopic brackets 3 and two vertical telescopic brackets 4. The vertical telescopic brackets 4 are fixedly installed on the left side of the horizontal telescopic brackets 3. The telescopic ends of the two vertical telescopic brackets 4 are jointly and fixedly connected to a U-shaped assembly bracket 5. An installation plate 6 is rotatably installed between the front and rear sides of the inner cavity of the U-shaped assembly bracket 5. The telescopic ends of the two horizontal telescopic brackets 3 are jointly and fixedly connected to a U-shaped frame 7. The bottom of the installation plate 6 is rotatably installed inside the U-shaped frame 7, and the photovoltaic panel 2 is embedded in the inside of the installation plate 6.

[0042] As detailed in the description, the horizontal telescopic frame 3 includes a first fixed cylinder 11 and a first top rod 12. The first top rod 12 passes through and is slidably installed on the right side of the first fixed cylinder 11, and the first top rod 12 and the first fixed cylinder 11 are fixedly connected by bolts 13. The vertical telescopic frame 4 includes a second fixed cylinder 14 and a second top rod 15. The second top rod 15 passes through and is slidably installed on the top of the second fixed cylinder 14. Specifically, the second fixed cylinder 14 is fixedly installed on the left side of the first fixed cylinder 11. The two first top rods 12 are respectively fixedly installed on the front and rear sides of the left side of the U-shaped frame 7, and the two second top rods 15 are respectively fixedly installed on the front and rear sides of the bottom of the U-shaped assembly frame 5.

[0043] As a preferred embodiment, a lifting assembly 8 is provided between the opposite sides of the telescopic ends of the two vertical telescopic frames 4. Specifically, the lifting assembly 8 includes a hanging plate 16, which is fixedly installed between the two second top rods 15 via a connecting block. A drive box 17 is fixedly connected to the bottom right side of the hanging plate 16. A drive motor 18 is fixedly installed inside the drive box 17. The drive motor 18 is a servo motor that can rotate in both directions and is electrically connected to an external power source. It is controlled by a control switch. An adjusting screw 19 is fixedly connected to the output end of the drive motor 18 via a coupling. The top end of the adjusting screw 19 passes through the drive box 17 and is rotatably connected to a stabilizing plate 20 via a bearing. The left side of the stabilizing plate 20 is fixedly connected to the right side of the hanging plate 16. A lifting plate 21 is sleeved and threadedly connected to the outer surface of the adjusting screw 19.

[0044] As a preferred embodiment, in order to achieve shading protection for the photovoltaic panel 2, a baffle assembly 9 is rotatably installed on one side of the top of the lifting plate 21. The top of the baffle assembly 9 passes through the U-shaped mounting frame 5 and extends above the U-shaped mounting frame 5. Specifically, the baffle assembly 9 includes an isolation box 22. The bottom of the isolation box 22 is rotatably installed on the top of the lifting plate 21 via a rotating block, and the isolation box 22 is located between the U-shaped mounting frame 5 and the mounting plate 6.

[0045] As a preferred solution, in order to ensure that the photovoltaic panel 2 can effectively absorb solar energy when the isolation box 22 does not cover the photovoltaic panel 2, a baffle 23 is slidably installed inside the isolation box 22, and light-transmitting grooves 24 are opened on the top of both the left and right sides of the isolation box 22.

[0046] As a preferred embodiment, in order to ensure that the isolation box 22 can effectively cover the photovoltaic panel 2, the top of the U-shaped assembly frame 5 is provided with an elastic pushing component 10. The elastic pushing component 10 includes a fixing plate 25, which is fixedly installed on the top of the U-shaped assembly frame 5. A push rod 26 is slidably installed through the right side of the fixing plate 25. A push head 27 is fixedly connected to the right end of the push rod 26. A spring 28 is sleeved on the outer surface of the push rod 26. The two ends of the spring 28 are fixedly connected to the push head 27 and the opposite side of the fixing plate 25, respectively. The right side of the push head 27 is in sliding contact with the left side of the isolation box 22.

[0047] In this embodiment, not only is convenient angle adjustment achieved during the installation of photovoltaic panel 2, but also the flip-top operation of the isolation box 22 is used to cover and protect photovoltaic panel 2 while ensuring that photovoltaic panel 2 can absorb solar energy normally, thus effectively ensuring the long service life of photovoltaic panel 2.

[0048] Example 2

[0049] As an improvement to the previous embodiment, a roof photovoltaic system with reversible protection further includes a water tank 29 that is fixedly connected to the top of two first fixed cylinders 11. One side of the water tank 29 passes through the U-shaped frame 7 and extends to the right side of the U-shaped frame 7. A water inlet 30 is provided on the right side of the top of the water tank 29 and below the mounting plate 6. A baffle plate 40 is fixedly installed on the top of the inner cavity of the water tank 29 and to the left of the water inlet 30. A filter screen 31 is fixedly connected between the bottom of the baffle plate 40 and the bottom of the inner cavity of the water tank 29. A perforated float plate 32 is slidably installed between the baffle plate 40 and the right side of the inner cavity of the water tank 29. Specifically, the perforated float plate 32 is a foam board with several drainage holes on its surface.

[0050] As explained in detail, rainwater is stored in a water tank 29. With the perforated float plate 32, the evaporation rate of the rainwater stored in the water tank 29 is reduced. In conjunction with the filter screen 31 and the baffle plate 40, impurities in the rainwater are filtered out.

[0051] As a preferred embodiment, in order to clean the surface of the photovoltaic panel 2, a water pump 33 is fixedly connected to the top of the water tank 29. The water pump 33 is electrically connected to an external power source and is controlled by an external control switch and a trigger button 39. The water pump 33 is fixedly installed on the top of the water tank 29. The input end of the water pump 33 is connected to a water inlet pipe 34. One end of the water inlet pipe 34 passes through the water tank 29 and extends into the interior of the water tank 29. A spray pipe 35 is fixedly installed on the top of the U-shaped mounting frame 5 through a connecting frame. Several cleaning pipes 36 are evenly connected to the surface of the spray pipe 35. A hose 37 is connected to the output end of the water pump 33, and one end of the hose 37 is connected to one end of the spray pipe 35. An overflow pipe 38 is connected to the back of the water tank 29. A trigger button 39 is fixedly installed on the top of the inner cavity of the water tank 29 and above the perforated float plate 32. The trigger button 39 is used in conjunction with the water pump 33.

[0052] The advantage of this embodiment compared to the previous embodiment is that it not only achieves rainwater storage, but also uses rainwater to clean the surface of the photovoltaic panel 2, ensuring the efficient photoelectric conversion of the photovoltaic panel 2.

[0053] A method for using a roof photovoltaic system with reversible protection includes the following steps:

[0054] Step 1, Photovoltaic Installation: Embed the photovoltaic panel 2 into the mounting plate 6, place the first fixing cylinder 11 on the horizontal roof, pull the U-shaped frame 7 to move the first top rod 12 in the first fixing cylinder 11, causing the mounting plate 6 to change its tilt angle. During the process, the mounting plate 6 drives the U-shaped assembly frame 5 to slide the second top rod 15 in the second fixing cylinder 14. After adjusting the photovoltaic panel 2 to the required installation angle, tighten the bolts 13 to fix the first top rod 12 and the first fixing cylinder 11.

[0055] Step 2, Rain Trigger: During rainy weather, rainwater falls into the inlet 30 through the mounting plate 6, passes through the perforated float 32 and the filter screen 31, and is stored in the water tank 29. As the water level increases, the perforated float 32 rises until the trigger button 39 is pressed. At this time, the water pump 33 starts and pumps the water in the water tank 29 to the hose 37 through the inlet pipe 34. The water then passes through the spray pipe 35 and sprays out from the cleaning pipe 36. The water sprayed out of the cleaning pipe 36 passes through the light-transmitting groove 24 to rinse the surface of the photovoltaic panel 2.

[0056] Step 3, Shading Protection: After the water pump 33 has been working for the set time in Step 2, the water pump 33 is turned off, and the drive motor 18 is started. The drive motor 18 drives the adjusting screw 19 to rotate, causing the lifting plate 21 to move the isolation box 22 upward along the U-shaped assembly frame 5. During the upward movement of the isolation box 22, the spring 28 pushes the isolation box 22 to tilt towards the mounting plate 6 until the isolation box 22 moves above the U-shaped assembly frame 5. At this point, the isolation box 22 covers the mounting plate 6, shading the photovoltaic panel 2. During this process, the baffle 23 slides downward in the isolation box 22 to block the light-transmitting groove 24 and shading the photovoltaic panel 2.

[0057] As an extension, when it is determined manually that the photovoltaic panel 2 needs protection, the drive motor 18 can be started directly to raise the lifting plate 21 and cause the isolation box 22 to cover the photovoltaic panel 2.

[0058] As an extension, when the drive motor 18 is reversed, causing the lifting plate 21 to descend, the isolation box 22 gradually moves away from the photovoltaic panel 2. During this process, the baffle 23 begins to slide down until it lands at the bottom of the inner cavity of the isolation box 22, as shown in the attached diagram. Figure 2 As shown.

[0059] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made to the technical solutions and inventive concepts of the present invention should all be covered within the scope of protection of the present invention.

Claims

1. A roof photovoltaic system with reversible protection, comprising a support frame (1) and photovoltaic panels (2) mounted on the support frame (1), characterized in that: The bracket (1) includes two horizontal telescopic brackets (3) and two vertical telescopic brackets (4). The vertical telescopic brackets (4) are fixedly installed on the left side of the horizontal telescopic brackets (3). The telescopic ends of the two vertical telescopic brackets (4) are fixedly connected to a U-shaped assembly bracket (5). An installation plate (6) is rotatably installed between the front and rear sides of the inner cavity of the U-shaped assembly bracket (5). The telescopic ends of the two horizontal telescopic brackets (3) are fixedly connected to a U-shaped bracket (7). The bottom of the installation plate (6) is rotatably installed inside the U-shaped bracket (7). The photovoltaic panel (2) is embedded in the inside of the installation plate (6). A lifting assembly (8) is provided between the opposite sides of the telescopic ends of the two vertical telescopic frames (4). A baffle assembly (9) is rotatably installed on the moving end of the lifting assembly (8). The top of the baffle assembly (9) passes through the U-shaped assembly frame (5) and extends to the top of the U-shaped assembly frame (5). An elastic pushing assembly (10) is provided on the top of the U-shaped assembly frame (5). The horizontal telescopic frame (3) includes a first fixed cylinder (11) and a first top rod (12). The first top rod (12) passes through and slides on the right side of the first fixed cylinder (11), and the first top rod (12) and the first fixed cylinder (11) are fixedly connected by bolts (13). The vertical telescopic frame (4) includes a second fixed cylinder (14) and a second top rod (15). The second top rod (15) passes through and slides on the top of the second fixed cylinder (14). The second fixed cylinder (14) is fixedly installed on the left side of the first fixed cylinder (11), the two first top rods (12) are fixedly installed on the front and rear sides of the left side of the U-shaped frame (7), and the two second top rods (15) are fixedly installed on the front and rear sides of the bottom of the U-shaped assembly frame (5); The lifting assembly (8) includes a hanging plate (16), which is fixedly installed between two second top rods (15) by a connecting block. A drive box (17) is fixedly connected to the bottom right side of the hanging plate (16). A drive motor (18) is fixedly installed inside the drive box (17). An adjusting screw (19) is fixedly connected to the output end of the drive motor (18) through a coupling. The top end of the adjusting screw (19) passes through the drive box (17) and is rotatably connected to a stabilizing plate (20) through a bearing. The left side of the stabilizing plate (20) is fixedly connected to the right side of the hanging plate (16). A lifting plate (21) is sleeved and threaded onto the outer surface of the adjusting screw (19). The baffle assembly (9) includes an isolation box (22), and a baffle (23) is slidably installed inside the isolation box (22). Light-transmitting grooves (24) are opened on the top of both the left and right sides of the isolation box (22). The bottom of the isolation box (22) is rotatably mounted on the top of the lifting plate (21) via a rotating block, and the isolation box (22) is positioned between the U-shaped assembly frame (5) and the mounting plate (6); The elastic pushing assembly (10) includes a fixing plate (25), which is fixedly installed on the top of the U-shaped assembly frame (5). A push rod (26) is slidably installed through the right side of the fixing plate (25). A push head (27) is fixedly connected to the right end of the push rod (26). A spring (28) is sleeved on the outer surface of the push rod (26). The two ends of the spring (28) are fixedly connected to the push head (27) and the side opposite to the fixing plate (25), respectively. The right side of the push head (27) is in sliding contact with the left side of the isolation box (22).

2. The roof photovoltaic system with reversible protection according to claim 1, characterized in that: A water tank (29) is fixedly connected to the top of the two first fixed cylinders (11). One side of the water tank (29) passes through the U-shaped frame (7) and extends to the right side of the U-shaped frame (7). An inlet (30) is provided on the right side of the top of the water tank (29) and below the mounting plate (6). A baffle plate (40) is fixedly installed on the top of the inner cavity of the water tank (29) and to the left of the inlet (30). A filter screen (31) is fixedly connected between the bottom of the baffle plate (40) and the bottom of the inner cavity of the water tank (29). A perforated float plate (32) is slidably installed between the baffle plate (40) and the right side of the inner cavity of the water tank (29).

3. The roof photovoltaic system with reversible protection according to claim 2, characterized in that: A water pump (33) is fixedly connected to the top of the water tank (29). The water pump (33) is fixedly installed on the top of the water tank (29). The input end of the water pump (33) is connected to an inlet pipe (34). One end of the inlet pipe (34) passes through the water tank (29) and extends into the interior of the water tank (29). A spray pipe (35) is fixedly installed on the top of the U-shaped assembly frame (5) through a connecting frame. Several cleaning pipes (36) are evenly connected to the surface of the spray pipe (35). A hose (37) is connected to the output end of the water pump (33), and one end of the hose (37) is connected to one end of the spray pipe (35).

4. The roof photovoltaic system with reversible protection according to claim 3, characterized in that: The back of the water tank (29) is connected to an overflow pipe (38). A trigger button (39) is fixedly installed at the top of the inner cavity of the water tank (29) and above the perforated float plate (32). The trigger button (39) is used in conjunction with the water pump (33).

5. A method of using a roof photovoltaic system with reversible protection as described in claim 4, characterized in that: Specifically, the following steps are included: Step 1, Photovoltaic Installation: Embed the photovoltaic panel (2) into the mounting plate (6), place the first fixing cylinder (11) on the horizontal roof, pull the U-shaped frame (7) to move the first top rod (12) in the first fixing cylinder (11), causing the mounting plate (6) to change its tilt angle. During the process, the mounting plate (6) drives the U-shaped assembly frame (5) to slide the second top rod (15) in the second fixing cylinder (14). After adjusting the photovoltaic panel (2) to the required installation angle, tighten the bolts (13) to fix the first top rod (12) and the first fixing cylinder (11). Step 2, Rain Trigger: During rainy weather, rainwater falls into the inlet (30) through the mounting plate (6), passes through the perforated float plate (32) and the filter screen (31) in sequence, and is stored in the water tank (29). As the amount of water stored increases, the perforated float plate (32) floats up until the trigger button (39) is pressed. At this time, the water pump (33) starts and pumps the water in the water tank (29) to the hose (37) through the inlet pipe (34). The water then passes through the spray pipe (35) and sprays out from the cleaning pipe (36). The water sprayed out from the cleaning pipe (36) passes through the light-transmitting groove (24) to rinse the surface of the photovoltaic panel (2). Step 3, shading protection: After the water pump (33) has been working for the set time in step 2, the water pump (33) is turned off and the drive motor (18) is started. The drive motor (18) drives the adjusting screw (19) to rotate, so that the lifting plate (21) drives the isolation box (22) to move upward along the U-shaped assembly frame (5). During the process of the isolation box (22) rising, the spring (28) pushes the isolation box (22) to tilt towards the side of the mounting plate (6) until the isolation box (22) moves above the U-shaped assembly frame (5). The isolation box (22) covers the mounting plate (6) and shades the photovoltaic panel (2). During the process, the baffle (23) slides downward in the isolation box (22) to block the light transmission groove (24) and shade the photovoltaic panel (2).

Images