Angle-adjustable photovoltaic device and method

Abstract

The invention belongs to the field of photovoltaic equipment, and particularly provides an angle-adjustable photovoltaic device and method, and the device comprises a supporting mechanism, the supporting mechanism comprises a supporting seat and a supporting shaft, the supporting shaft is driven by a rotation driving mechanism, the supporting shaft is sleeved with a ring seat, and the ring seat is driven up and down through an up-down driving mechanism. The vertical driving mechanism comprises a rack arranged on the outer side of the supporting shaft, the gear is meshed with the rack, a rotating shaft of the gear is driven by a motor, a plurality of photovoltaic mechanisms distributed along the axis of the supporting shaft are arranged between the ring base and the top of the supporting shaft, and each photovoltaic mechanism comprises a photovoltaic support and a photovoltaic panel arranged on the photovoltaic support. The photovoltaic support comprises a supporting rod and a connecting rod, one end of the supporting rod is hinged to the ring seat, the other end of the supporting rod is hinged to the connecting rod, the other end of the connecting rod is hinged to a hinged support at the upper end of the supporting shaft, and the photovoltaic panel is installed on the connecting rod. The device and the method are beneficial for adjusting the angle of the photovoltaic panel, so that the photovoltaic panel is in an expanded or contracted state conveniently, the flexibility is improved, and cleaning operation is facilitated.

Description

Technical Field

[0001] The present invention belongs to the field of photovoltaic equipment, and in particular relates to an adjustable photovoltaic device and method. Background Art

[0002] Despite rapid growth in photovoltaic (PV) installations in recent years, the efficiency of PV modules is significantly affected by environmental factors, particularly in arid and semi-arid regions. Dust has become a key factor limiting power generation efficiency. Studies have shown that dust coverage can cause PV module efficiency to drop by 15%-40%. Long-term cleaning can even trigger hot spot effects, accelerating module aging. Traditional manual and mechanical cleaning is costly in large-scale PV power plants and difficult to implement in areas with scarce water resources. The most common cleaning equipment currently available is a cleaning robot, a device used to clean photovoltaic surfaces in daily life. It is widely used in the field of PV maintenance.

[0003] When using existing cleaning robots, they are first placed on the photovoltaic surface and then clean the photovoltaic surface by dipping the robot in water or using a brush. During use, it was found that existing cleaning robots rely on high-precision equipment, which can easily damage the surface of the components. In addition, they require high-frequency operation in areas with frequent sand and dust, resulting in high maintenance costs, which leads to low equipment efficiency.

[0004] At the same time, the angle of the existing photovoltaic panels cannot be adjusted. When the photovoltaic panels are in a horizontal state, it is not conducive to the implementation of cleaning equipment. When the photovoltaic panels are in a tilted state, it affects the efficiency of photovoltaic power generation. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a photovoltaic device and method with adjustable angle, which is conducive to adjusting the angle of the photovoltaic panel, facilitating its expansion or contraction state, improving flexibility, and facilitating cleaning operations.

[0006] The cam is mounted on a link rod and has a guide rail, and the guide rail is mounted on a link rod. The guide rails are connected along the link rod to the upper and lower ends of the cam. The guide rails are connected along the link rod to the lower end of the cam.

[0007] In a preferred solution, the rotation drive mechanism includes a drive motor, an output end of the drive motor is provided with a driving helical gear, and a lower end of the support shaft is provided with a driven helical gear meshing with the driving helical gear.

[0008] In the preferred solution, the support base is a box structure, the support shaft is rotatably mounted on the end cover, the end cover is mounted on the support base, a through hole is provided on the top of the support base for the support shaft to pass through, and the output end of the drive motor extends into the support base through the through hole on one side of the support base.

[0009] In a preferred embodiment, the photovoltaic mechanism also includes a secondary photovoltaic panel mechanism arranged between two adjacent groups of photovoltaic panels. The secondary photovoltaic panel mechanism includes a secondary photovoltaic panel, a connecting block is provided on the secondary photovoltaic panel, and ball joints are provided on the connecting block and the photovoltaic panel. A rocker is connected between the two groups of ball joints.

[0010] The preferred solution includes an adjustment mechanism and a cleaning mechanism. The adjustment mechanism includes an adjustment bracket. Adjustment arms are provided on both sides of the adjustment bracket. The adjustment arms are rotatably connected to the adjustment bracket. A connecting shaft is provided between the two sets of adjustment arms. An adjustment drive mechanism is provided on the adjustment bracket. The adjustment drive mechanism includes a telescopic mechanism. A hinge support is provided on the adjustment bracket. The telescopic mechanism is hingedly mounted on the hinge support. The telescopic end of the telescopic mechanism is connected to the sleeve. The sleeve is rotatably mounted on the connecting shaft. A cleaning mechanism is provided on the end of the adjustment arm away from the adjustment drive mechanism.

[0011] In a preferred solution, the cleaning mechanism includes a cleaning bracket, on which are provided a plurality of cleaning rollers, the rotating shafts of the cleaning rollers being rotatably mounted on the cleaning bracket.

[0012] In a preferred solution, the cleaning bracket includes an adjusting shaft, which is rotatably installed between the adjusting arms, and is driven by a first drive motor. A support seat is provided on the adjusting shaft, and a rotating shaft is rotatably installed on the support seat. The rotating shaft is driven by a second drive motor, and a flap is provided on the rotating shaft, and a mounting frame is provided on the flap. The cleaning roller is provided on the mounting frame, and a third drive motor is provided on the upper side of the mounting frame. The output shaft of the third drive motor passes through a through hole on the mounting frame and is rotatably installed on the flap. A water washing device is also included, and the water washing device includes a water tank arranged between two groups of adjusting arms, and the water inlet of the water tank is provided with an electromagnetic valve, and the water inlet of the water tank is connected to the water supply system through a pipe.

[0013] In the preferred solution, a cover plate is provided on the flap relative to the cleaning roller, and the cover plate is arranged perpendicular to the flap plate. When the second drive motor drives one side of the cleaning roller, the first drive motor drives the adjusting shaft to rotate, and flips the cleaning roller into the water tank. When the second drive motor drives the cover plate to the side close to the photovoltaic mechanism, the first drive motor drives the adjusting shaft to rotate, and flips the cover plate to the upper side of the water tank to close the water tank opening.

[0014] In a preferred solution, a plurality of air holes are provided on the cover plate, and a heating wire is provided in the water tank.

[0015] The present invention also provides a method for operating an angle-adjustable photovoltaic device, comprising the following steps: S1. Fix the support base and drive the ring base upward through the up and down drive mechanism so that the photovoltaic panel and the support axis remain in the expanded state, which is the photovoltaic power generation state; S2. When the photovoltaic panel needs to be cleaned, the ring seat is driven downward by the upper and lower driving mechanisms. At this time, the photovoltaic panel rotates downward until it rotates to a downward tilted state. The second driving motor is started to rotate the flap, and the cleaning roller is rotated to the side close to the water tank. The adjustment mechanism is started to adjust the angle of the cleaning roller so that it is parallel to the photovoltaic panel and keeps in contact with it. Then the rotation drive mechanism is started, and the photovoltaic panel rotates around the support shaft. The cleaning roller cleans the photovoltaic panel. After cleaning is completed, the photovoltaic panel is adjusted to an unfolded state by the upper and lower driving mechanisms. S3. When the cleaning roller needs to be cleaned, the adjustment mechanism is started and the angle of the cleaning mechanism is adjusted so that the adjustment arm is in a horizontal state. Water is added to the water tank through the water supply system, and then the first drive motor is started. The adjustment shaft rotates and the cleaning roller is flipped into the water tank. At this time, the cover plate is set on the upper side of the water tank, the third drive motor is started, and the mounting frame rotates to clean the cleaning roller. After cleaning is completed, the third drive motor stops and the first drive motor rotates in the opposite direction to flip the cleaning roller out of the water tank. Then repeat step S2 to clean the photovoltaic panel.

[0016] The present invention provides an angle-adjustable photovoltaic device and method, which have the following beneficial effects: 1. Utilizing an upper and lower drive mechanism, the ring base moves up and down, driving the photovoltaic mounts in concert, allowing the panels to switch between vertical deployment and downward tilt. Compared to traditional fixed-angle photovoltaic panels, this design optimizes the power generation angle based on the sunlight angle. The tilted position of the panels facilitates closer contact with the cleaning mechanism during cleaning, resolving the difficulty of access for cleaning equipment in traditional horizontal installations.

[0017] 2. The rotary drive mechanism drives the support shaft to rotate, and cooperates with the bonding state of the cleaning roller and the photovoltaic panel to achieve automatic cleaning of the entire area of ​​the photovoltaic panel surface without manual intervention, reducing the cleaning cost of large power stations.

[0018] 3. The cleaning mechanism realizes the full process automation of cleaning roller angle adjustment, flipping and immersion in water tank for cleaning, and cover plate closing of water tank through multi-motor linkage.

[0019] 4. A secondary photovoltaic panel mechanism is set between adjacent photovoltaic panels and connected to the rocker through a ball joint. Without affecting the angle adjustment, the power generation area is increased, while the structural stability of the overall bracket is improved, avoiding the shaking problem during traditional multi-panel connection.

[0020] 5. The adjustment mechanism can flexibly adjust the angle of the cleaning arm to meet the cleaning needs of photovoltaic panels with different inclination angles, and has strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the installation structure of the photovoltaic bracket of the present invention; Figure 3 This is a schematic diagram of the installation structure of the photovoltaic bracket of the present invention from another angle; Figure 4 This is a schematic diagram of the connection structure between the secondary photovoltaic panel and the rocker; Figure 5 Schematic diagram of the internal structure of the support seat; Figure 6 This is a schematic diagram of the structure of the adjustment mechanism, cleaning mechanism and washing mechanism Figure 7 It is a schematic diagram of the installation structure of the cleaning mechanism; In the figure: support mechanism 100, support base 110, support shaft 120, slide 121, end cover 122, rotation drive mechanism 130, drive motor 131, active helical gear 132, driven helical gear 133, ring base 140, gear rack 141, limit block 142, upper and lower drive mechanism 150, rack 151, gear 152, motor 153; Photovoltaic mechanism 200, photovoltaic bracket 210, support rod 211, connecting rod 212, first hinge support 213, photovoltaic panel 220, auxiliary photovoltaic panel mechanism 230, auxiliary photovoltaic panel 231, connecting block 232, ball joint 233, rocker 234; Adjustment mechanism 300, adjustment bracket 310, adjustment arm 320, connecting shaft 330, adjustment drive mechanism 340, telescopic mechanism 341, second hinge support 342, sleeve 343, Cleaning mechanism 400, cleaning bracket 410, adjustment shaft 411, support base 412, rotating shaft 413, flap 414, mounting bracket 415, cleaning roller 420, first drive motor 430, second drive motor 440, cover 450, air hole 451, third drive motor 460; Water washing device 500 , water tank 510 , solenoid valve 520 , heating wire 530 . DETAILED DESCRIPTION

[0022] Example 1: like Figures 1-3 As shown, a photovoltaic device with adjustable angle includes a support mechanism 100 , wherein the support mechanism 100 includes a support base 110 and a support shaft 120 rotatably mounted on the support base 110 , and the support shaft 120 is driven by a rotation driving mechanism 130 .

[0023] In this embodiment, if Figure 3 and 4 As shown, the support base 110 is a box structure. The support shaft 120 is rotatably mounted on the end cover 122 via a bearing. The end cover 122 is mounted on the support base 110 via bolts. A through hole is provided at the top of the support base 110 for the support shaft 120 to pass through. The output end of the drive motor 131 extends into the support base 110 through a through hole on one side of the support base 110. A power box is provided inside the support base 110 to supply power to the relevant drive equipment.

[0024] The rotation drive mechanism 130 includes a drive motor 131. The output end of the drive motor 131 is provided with a driving bevel gear 132. The lower end of the support shaft 120 is provided with a driven bevel gear 133 that meshes with the driving bevel gear 132. The drive motor 131 drives the driving bevel gear 132 to rotate, and the driving bevel gear 132 meshes with the driven bevel gear 133 to drive the support shaft 120.

[0025] The ring seat 140 is mounted on the support shaft 120, and the ring seat 140 is driven up and down by an up and down driving mechanism 150. The up and down driving mechanism 150 includes a rack 151 arranged on the outside of the support shaft 120, and a gear frame 141 is provided on the outside of the ring seat 140. The rotating shaft of the gear 152 is rotatably mounted on the gear frame 141, and the gear 152 is engaged with the rack 151. The rotating shaft of the gear 152 is driven by a motor 153. A limit block 142 is provided on the ring seat 140, and a slide groove 121 that cooperates with the limit block 142 is provided on the support shaft 120.

[0026] The motor 153 of the up-and-down driving mechanism 150 is started, driving the gear 152 to rotate. Since the gear 152 is engaged with the rack 151 , the gear 152 climbs up and down along the rack 151 , thereby moving the ring seat 140 up and down.

[0027] A number of photovoltaic mechanisms 200 are provided between the ring seat 140 and the top of the support shaft 120 and are distributed along the axis of the support shaft 120. The photovoltaic mechanism 200 includes a photovoltaic bracket 210 and a photovoltaic panel 220 arranged on the photovoltaic bracket 210. The photovoltaic bracket 210 includes a support rod 211 and a connecting rod 212. One end of the support rod 211 is hinged to the ring seat 140, and the other end is hinged to the connecting rod 212. The other end of the connecting rod 212 is hinged to the first hinge support 213 at the upper end of the support shaft 120, and the photovoltaic panel 220 is installed on the connecting rod 212.

[0028] When the ring seat 140 moves up and down, the photovoltaic bracket 210 is pulled up and down to adjust the angle of the connecting rod 212, thereby achieving angle adjustment of the photovoltaic panel 220.

[0029] The support base 110 is fixed, and the ring base 140 is driven to move upward by the up-down driving mechanism 150 so that the photovoltaic panel 220 and the support shaft 120 are kept in an expanded state vertically, which is the photovoltaic power generation state.

[0030] When the photovoltaic panel 220 needs to be cleaned, the ring seat 140 is driven downward by the up and down driving mechanism 150. At this time, the photovoltaic panel 220 rotates downward until it rotates to a downward tilted state, assisting other cleaning equipment to clean the photovoltaic panel.

[0031] Preferably, Figure 1 and Figure 4 As shown, the photovoltaic mechanism 200 also includes a secondary photovoltaic panel mechanism 230 arranged between two adjacent groups of photovoltaic panels 220. The secondary photovoltaic panel mechanism 230 includes a secondary photovoltaic panel 231. The secondary photovoltaic panel 231 is provided with a connecting block 232. The connecting block 232 and the photovoltaic panel 220 are both provided with a ball joint 233. The two groups of ball joints 233 are connected by a rocker 234.

[0032] By providing the auxiliary photovoltaic panel 231 , on the one hand, the area of ​​the photovoltaic panels is increased without affecting the angle adjustment of the photovoltaic panels 220 , and on the other hand, the auxiliary photovoltaic panel 231 is provided between the two groups of photovoltaic panels to improve the connection strength.

[0033] Example 2: Different from Example 1, Figure 1 and Figures 6 and 7 As shown, it also includes an adjustment mechanism 300 and a cleaning mechanism 400. The adjustment mechanism 300 includes an adjustment bracket 310. The adjustment bracket 310 includes three groups of mounting plates, namely two groups of side plates. A connecting plate is set between the two groups of side plates. The adjustment bracket 310 is mounted on the end of the support seat 110 and is connected by bolts.

[0034] Adjustment arms 320 are provided on both sides of the adjustment bracket 310, and the adjustment arms 320 are rotatably connected to the adjustment bracket 310. A connecting shaft 330 is provided between the two groups of adjustment arms 320. The connecting shaft 330 is provided on the adjustment bracket 310 and an adjustment drive mechanism 340 is provided. The adjustment drive mechanism 340 includes a telescopic mechanism 341, and the telescopic mechanism 341 is an electric push rod. A second hinge support 342 is provided on the adjustment bracket 310, and the telescopic mechanism 341 is hingedly mounted on the second hinge support 342. The telescopic end of the telescopic mechanism 341 is connected to the sleeve 343, and the sleeve 343 is rotatably mounted on the connecting shaft 330. A cleaning mechanism 400 is provided on the end of the adjustment arm 320 away from the adjustment drive mechanism 340.

[0035] A cleaning mechanism 400 is provided at the end of the adjustment arm 320 . The angle of the cleaning mechanism 400 can be adjusted by the adjustment mechanism 300 , thereby facilitating the cleaning of the photovoltaic panel.

[0036] In this embodiment, the cleaning mechanism 400 includes a cleaning bracket 410 , on which a plurality of cleaning rollers 420 are provided. The rotating shafts of the cleaning rollers 420 are rotatably mounted on the cleaning bracket 410 .

[0037] The cleaning bracket 410 includes an adjusting shaft 411 , which is rotatably mounted between the adjusting arms 320 . The adjusting shaft 411 is driven by a first driving motor 430 , and the first driving motor 430 drives the adjusting shaft 411 to rotate, thereby adjusting the angle of the cleaning roller 420 .

[0038] A support base 412 is provided on the adjusting shaft 411, and a rotating shaft 413 is rotatably installed on the support base 412. The rotating shaft 413 is driven by a second drive motor 440. A flap 414 is provided on the rotating shaft 413, and a mounting frame 415 is provided on the flap 414. The cleaning roller 420 is arranged on the mounting frame 415, and a third drive motor 460 is provided on the upper side of the mounting frame 415. The output shaft of the third drive motor 460 passes through the through hole on the mounting frame 415 and is rotatably installed on the flap 414. The rotation of the mounting frame 415 is driven by the third drive motor 460, thereby realizing the position adjustment of several groups of cleaning rollers 420.

[0039] A cover plate 450 is provided on the flap 414 opposite the cleaning roller 420. The cover plate 450 is arranged perpendicular to the flap 414 and is sized to cover the top opening of the water tank 510. Specifically, the cover plate 450 and the cleaning roller 420 are disposed at opposite ends of the flap 414. The positions of the cover plate 450 and the cleaning roller 420 can be adjusted by a second drive motor 440. Activating the second drive motor 440 rotates the flap 414, moving the cleaning roller 420 or the cover plate 450 closer to the photovoltaic mechanism 200.

[0040] It also includes a water washing device 500, which includes a water tank 510 arranged between two groups of adjustment arms 320. The position of the water tank 510 satisfies the following conditions: when the second drive motor 440 drives the cleaning roller 420 to rotate to the side close to the photovoltaic mechanism 200, the first drive motor 430 drives the adjustment shaft 411 to rotate, and flips the cleaning roller 420 into the water tank 510; when the second drive motor 440 drives the cover plate 450 to rotate to the side close to the photovoltaic mechanism 200, the first drive motor 430 drives the adjustment shaft 411 to rotate, and the cover plate 450 can be flipped to cover the upper side of the water tank 510, thereby closing the opening of the water tank 510.

[0041] The water inlet of the water tank 510 is provided with a solenoid valve 520, and the water inlet of the water tank 510 is connected to the water supply system through a pipe, that is, water does not need to be stored in the water tank 510 all the time. When the cleaning roller 420 needs to be cleaned, water is supplied to the water tank 510 through the water supply system.

[0042] The cover plate 450 is provided with a plurality of air holes 451 , and a heating wire 530 is provided in the water tank 510 .

[0043] During actual use, a nozzle is also provided on the side of the air hole 451 close to the cleaning roller 420. When the cover plate 450 is flipped over to cover the upper side of the water tank 510, the water in the water tank 510 is heated by the heating wire 530, and the water vapor is discharged through the air hole on the cover plate 450 and sprayed onto the cleaning roller 420, so that the water vapor adheres to the cleaning roller 420, which is beneficial to adjust the humidity of the cleaning roller 420.

[0044] In this embodiment, a method for operating an angle-adjustable photovoltaic device includes the following steps: S1. Fix the support base 110 and drive the ring base 140 upward through the up and down drive mechanism 150 so that the photovoltaic panel 220 and the support shaft 120 remain in an expanded state vertically, which is the photovoltaic power generation state.

[0045] S2. When the photovoltaic panel 220 needs to be cleaned, the ring seat 140 is driven downward by the upper and lower driving mechanisms 150. At this time, the photovoltaic panel 220 rotates downward until it rotates to a downward tilted state. The second driving motor 440 is started to rotate the flap 414 and rotate the cleaning roller 420 to the side close to the water tank 510. The adjusting mechanism 300 is started to adjust the angle of the cleaning roller 420 so that it is parallel to the photovoltaic panel 220 and maintains a fitting state. Then the rotation driving mechanism 130 is started, and the photovoltaic panel 220 rotates around the support shaft 120. The cleaning roller 420 cleans the photovoltaic panel 220. After cleaning is completed, the photovoltaic panel 220 is adjusted to an unfolded state by the upper and lower driving mechanisms 150.

[0046] S3. When the cleaning roller 420 needs to be cleaned, the adjustment mechanism 300 is started, and the angle of the cleaning mechanism 400 is adjusted so that the adjustment arm 320 is in a horizontal state. Water is added to the water tank 510 through the water supply system, and then the first drive motor 430 is started, the adjustment shaft 411 rotates, and the cleaning roller 420 is flipped into the water tank 510. At this time, the cover plate 450 is covered on the upper side of the water tank 510, and the third drive motor 460 is started, and the mounting bracket 415 rotates to clean the cleaning roller 420. After cleaning is completed, the third drive motor 460 stops starting, and the first drive motor 430 rotates in the opposite direction to flip the cleaning roller 420 out of the water tank 510. Then repeat step S2 to clean the photovoltaic panel 220.

[0047] When humidification or steam cleaning of the cleaning roller 420 is required, the adjustment mechanism 300 is activated, the angle of the cleaning mechanism 400 is adjusted so that the adjustment arm 320 is horizontal, water is added to the water tank 510 through the water supply system, the second drive motor 440 is driven, the cover plate 450 is rotated to the side close to the photovoltaic mechanism 200, the first drive motor 430 is activated, the adjustment shaft 411 is rotated, and the cover plate 450 is flipped and placed in the water tank 510. The water in the water tank 510 is heated by the heating wire 530, and the water vapor is discharged through the air holes in the cover plate 450 and sprayed onto the cleaning roller 420, causing the water vapor to adhere to the cleaning roller 420, thereby facilitating humidity adjustment or steam cleaning of the cleaning roller 420. This is particularly suitable for arid areas, where it can reduce water waste, and cold areas, where it can prevent ice from forming and affecting the cleaning effect.

[0048] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The embodiments and features in the embodiments of this application may be arbitrarily combined with each other unless they conflict. The scope of protection of the present invention shall be the technical solutions described in the claims, including equivalent alternatives to the technical features of the technical solutions described in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A photovoltaic device with adjustable angle, characterized in that: The invention comprises a support mechanism (100), wherein the support mechanism (100) comprises a support base (110) and a support shaft (120) rotatably mounted on the support base (110), wherein the support shaft (120) is driven by a rotation driving mechanism (130), a ring base (140) is mounted on the support shaft (120), and the ring base (140) is driven up and down by an up and down driving mechanism (150), wherein the up and down driving mechanism (150) comprises a rack (151) arranged on the outside of the support shaft (120), a gear frame (141) is arranged on the outside of the ring base (140), a rotating shaft of a gear (152) is rotatably mounted on the gear frame (141), the gear (152) is meshed with the rack (151), the rotating shaft of the gear (152) is driven by a motor (153), and the ring base (140) is mounted on the support shaft (120). A limit block (142) is provided, a slide groove (121) that cooperates with the limit block (142) is provided on the support shaft (120), a plurality of photovoltaic mechanisms (200) distributed along the axis of the support shaft (120) are provided between the ring seat (140) and the top of the support shaft (120), the photovoltaic mechanism (200) includes a photovoltaic bracket (210) and a photovoltaic panel (220) arranged on the photovoltaic bracket (210), the photovoltaic bracket (210) includes a support rod (211) and a connecting rod (212), one end of the support rod (211) is hinged to the ring seat (140), and the other end is hinged to the connecting rod (212), the other end of the connecting rod (212) is hinged to a hinge support (213) at the upper end of the support shaft (120), and the photovoltaic panel (220) is installed on the connecting rod (212).

2. The angle-adjustable photovoltaic device according to claim 1, characterized in that: The rotation drive mechanism (130) includes a drive motor (131), an output end of the drive motor (131) is provided with a driving helical gear (132), and a lower end of the support shaft (120) is provided with a driven helical gear (133) meshing with the driving helical gear (132).

3. The angle-adjustable photovoltaic device according to claim 2, characterized in that: The support base (110) is a box structure, the support shaft (120) is rotatably mounted on the end cover (122), the end cover (122) is mounted on the support base (110), a through hole for the support shaft (120) to pass through is provided on the top of the support base (110), and the output end of the drive motor (131) passes through the through hole on one side of the support base (110) and extends into the support base (110).

4. The angle-adjustable photovoltaic device according to claim 1, characterized in that: The photovoltaic mechanism (200) further comprises a secondary photovoltaic panel mechanism (230) arranged between two adjacent groups of photovoltaic panels (220), the secondary photovoltaic panel mechanism (230) comprising a secondary photovoltaic panel (231), a connecting block (232) being provided on the secondary photovoltaic panel (231), a ball joint (233) being provided on the connecting block (232) and the photovoltaic panel (220), and a rocker (234) being connected between the two groups of ball joints (233).

5. The angle-adjustable photovoltaic device according to claim 1, characterized in that: The invention comprises an adjusting mechanism (300) and a cleaning mechanism (400). The adjusting mechanism (300) comprises an adjusting bracket (310). Adjusting arms (320) are provided on both sides of the adjusting bracket (310). The adjusting arms (320) are rotatably connected to the adjusting bracket (310). A connecting shaft (330) is provided between the two sets of adjusting arms (320). An adjusting drive mechanism (340) is provided on the adjusting bracket (310). The adjusting drive mechanism (340) comprises a telescopic mechanism (341). A hinge support (342) is provided on the adjusting bracket (310). The telescopic mechanism (341) is hingedly mounted on the hinge support (342). The telescopic end of the telescopic mechanism (341) is connected to a sleeve (343). The sleeve (343) is rotatably mounted on the connecting shaft (330). The cleaning mechanism (400) is provided on one end of the adjusting arm (320) away from the adjusting drive mechanism (340).

6. The angle-adjustable photovoltaic device according to claim 5, characterized in that: The cleaning mechanism (400) comprises a cleaning bracket (410), on which a plurality of cleaning rollers (420) are arranged, and the rotating shafts of the cleaning rollers (420) are rotatably mounted on the cleaning bracket (410).

7. The angle-adjustable photovoltaic device according to claim 6, characterized in that: The cleaning bracket (410) includes an adjusting shaft (411), the adjusting shaft (411) is rotatably mounted between the adjusting arms (320), the adjusting shaft (411) is driven by a first driving motor (430), a support seat (412) is provided on the adjusting shaft (411), a rotating shaft (413) is rotatably mounted on the support seat (412), the rotating shaft (413) is driven by a second driving motor (440), a flap (414) is provided on the rotating shaft (413), a mounting bracket (415) is provided on the flap (414), and a cleaning roller (411) is provided with a plurality of movable members. 20) is arranged on a mounting frame (415), a third drive motor (460) is provided on the upper side of the mounting frame (415), an output shaft of the third drive motor (460) passes through a through hole on the mounting frame (415) and is rotatably mounted on the flap (414); and further comprises a water washing device (500), the water washing device (500) comprising a water tank (510) arranged between two sets of adjustment arms (320), a solenoid valve (520) being provided at a water inlet of the water tank (510), and the water inlet of the water tank (510) being connected to a water supply system through a pipeline.

8. The angle-adjustable photovoltaic device according to claim 7, characterized in that: A cover plate (450) is provided on the flip plate (414) relative to the cleaning roller (420), and the cover plate (450) is arranged perpendicular to the flip plate (414). When the second drive motor (440) drives the cleaning roller (420) to rotate to a side close to the photovoltaic mechanism (200), the first drive motor (430) drives the adjustment shaft (411) to rotate, and flips the cleaning roller (420) into the water tank (510). When the second drive motor (440) drives the cover plate (450) to rotate to a side close to the photovoltaic mechanism (200), the first drive motor (430) drives the adjustment shaft (411) to rotate, and flips the cover plate (450) to cover the upper side of the water tank (510), thereby sealing the opening of the water tank (510).

9. The angle-adjustable photovoltaic device according to claim 8, characterized in that: The cover plate (450) is provided with a plurality of air holes (451), and a heating wire (530) is provided in the water tank (510).

10. The method for operating an angle-adjustable photovoltaic device according to any one of claims 5 to 9, characterized in that: The following steps are involved: S1, fixing the support base (110), and driving the ring base (140) to move upward through the up and down driving mechanism (150), so that the photovoltaic panel (220) and the support shaft (120) are kept in an expanded state vertically, which is a photovoltaic power generation state; S2. When the photovoltaic panel (220) needs to be cleaned, the ring seat (140) is driven to move downward by the upper and lower driving mechanisms (150). At this time, the photovoltaic panel (220) rotates downward until it rotates to a downward tilted state. The second driving motor (440) is started to rotate the flap (414), and the cleaning roller (420) is rotated to the side close to the water tank (510). The adjusting mechanism (300) is started to adjust the angle of the cleaning roller (420) so that it is parallel to the photovoltaic panel (220) and maintains a contact state. Then, the rotation driving mechanism (130) is started, and the photovoltaic panel (220) rotates around the support shaft (120). The cleaning roller (420) cleans the photovoltaic panel (220). After cleaning is completed, the photovoltaic panel (220) is adjusted to an unfolded state by the upper and lower driving mechanisms (150); S3. When the cleaning roller (420) needs to be cleaned, the adjustment mechanism (300) is started, and the angle of the cleaning mechanism (400) is adjusted so that the adjustment arm (320) is in a horizontal state. Water is added to the water tank (510) through the water supply system, and then the first drive motor (430) is started, and the adjustment shaft (411) rotates to flip the cleaning roller (420) into the water tank (510). At this time, the cover plate (450) is covered on the upper side of the water tank (510). The third drive motor (460) is started, and the mounting frame (415) rotates to clean the cleaning roller (420). After cleaning is completed, the third drive motor (460) is stopped, and the first drive motor (430) rotates in the opposite direction to flip the cleaning roller (420) out of the water tank (510). Then, step S2 is repeated to clean the photovoltaic panel (220).

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