Photovoltaic power generation double-shaft tracking device

Abstract

The invention discloses a photovoltaic power generation double-shaft tracking device which comprises a base, a stand column rotationally arranged on the base, a cross beam rotationally arranged on the stand column and a mounting frame arranged on the cross beam, and a solar cell panel is arranged on the mounting frame; a cleaning mechanism is arranged on the mounting frame and comprises a pair of racks, a dust collection barrel, a pair of rotating shafts, a supporting plate, a water storage barrel, a plurality of dust collection pipe sets, a plurality of water spraying pipe sets and a plurality of cleaning brushes. According to the photovoltaic power generation double-shaft tracking device, the outer surface of the solar cell panel can be efficiently cleaned, meanwhile, the solar cell panel cannot be scratched and damaged, and it is guaranteed that sunlight is fully absorbed by the solar cell panel.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power generation equipment. More specifically, the present invention relates to a dual-axis tracking device for photovoltaic power generation. Background Art

[0002] The dual-axis tracking device for photovoltaic power generation is to effectively adjust the angle of the solar panel in real time according to the position of the sun, so as to absorb sunlight as fully as possible. The existing dual-axis tracking devices for photovoltaic power generation have relatively mature adjustment functions for both the horizontal angle and the vertical angle of the solar panel. In order to further improve the absorption efficiency of the solar panel for sunlight, a cleaning component is usually set to ensure the cleanliness of the surface of the solar panel. For example, the invention patent with the authorization announcement number CN108279712B discloses an electric push rod type dual-axis solar tracking system, which is provided with a cleaning and protection device, including an upper roller rotating mechanism, a lower roller rotating mechanism and a cleaning and protection net. The cleaning and protection net sweeps back and forth on the upper surface of the photovoltaic panel under the action of the upper roller rotating mechanism and the lower roller rotating mechanism. In the above patent technology, a cleaning and protection net is arranged on the outer surface of the photovoltaic panel, which affects the absorption of sunlight. In addition, the cleaning and protection net moves back and forth on the outer surface of the photovoltaic panel to sweep, and the dust on the surface of the photovoltaic panel is raised during the back-and-forth sweeping process, and the raised dust will fall on the surface of the panel again, and the surface of the panel cannot be effectively cleaned. Summary of the Invention

[0003] An object of the present invention is to solve at least the above problems and provide at least the advantages described hereinafter.

[0004] To achieve these and other advantages in accordance with the present invention, there is provided a dual-axis tracking device for photovoltaic power generation, which includes a base, a column rotatably provided on the base, a cross beam rotatably provided on the column, and a mounting frame provided on the cross beam. A solar panel is provided on the mounting frame; a cleaning mechanism is provided on the mounting frame, and it includes: A pair of racks, which are provided on both sides in the length direction of the mounting frame and are symmetrically located on both sides of the solar panel respectively; each rack extends along the width direction of the mounting frame; A dust suction barrel, which is arranged above the solar panel along the length direction of the mounting frame, and a dust suction component is provided in the dust suction barrel; A pair of rotating shafts, which are respectively coaxially arranged at both ends of the dust suction barrel, and a gear disc is fixedly sleeved on each rotating shaft, and each gear disc meshes with the corresponding rack; A support plate, which is slidably arranged on one side of the mounting frame along the width direction of the mounting frame, and a motor is provided on the support plate, and the output shaft of the motor is coaxially connected to the end of one of the rotating shafts; A water storage bucket coaxially sleeved outside the dust suction bucket; Multiple dust suction pipe groups arranged at intervals along the circumferential direction of the dust suction bucket. Each dust suction pipe group includes multiple dust suction pipes arranged at intervals along the axial direction of the dust suction bucket. One end of each dust suction pipe is connected to the dust suction assembly, and the other end sequentially passes through the side wall of the dust suction bucket and the water storage bucket along the radial direction of the dust suction bucket and extends to the outside of the water storage bucket; Multiple water spray pipe groups. One water spray pipe group is arranged on one side of each dust suction pipe group. Each water spray pipe group includes multiple water spray pipes arranged at intervals along the axial direction of the rotating shaft. One end of each water spray pipe is communicated with the inside of the water storage bucket, and the other end extends radially outward of the water storage bucket and is provided with a water valve-equipped nozzle; Multiple cleaning brushes. One cleaning brush is arranged on the other side of each dust suction pipe group. Each cleaning brush is an arc-shaped structure with the center of the circle located on the axis of the rotating shaft. The outer radius of the cleaning brush is not less than the distance between the axis of the rotating shaft and the solar panel; the distance between the other end of each water spray pipe and the axis of the rotating shaft and the distance between the other end of each dust suction pipe and the axis of the rotating shaft are both less than the distance between the axis of the rotating shaft and the solar panel.

[0005] Preferably, in the photovoltaic power generation dual-axis tracking device, a glass plate is provided above the solar panel, and the glass plate is located between a pair of racks.

[0006] Preferably, in the photovoltaic power generation dual-axis tracking device, a first photosensitive sensor is provided inside the glass plate, and a second photosensitive sensor is provided outside; The cleaning mechanism further includes a controller, which is connected to the motor, the dust suction assembly, the water valve, the first photosensitive sensor, and the second photosensitive sensor; the controller receives the first optical signal detected by the first photosensitive sensor and the second optical signal detected by the second photosensitive sensor, and calculates the optical signal difference between the first optical signal and the second optical signal. When the optical signal difference is greater than the first set threshold, the controller controls the motor and the dust suction assembly to start, otherwise it does not start; when the optical signal difference is greater than the second set threshold, the controller controls the motor, the dust suction assembly, and the water valve to start; the second set threshold is greater than the first set threshold.

[0007] Preferably, the photovoltaic power generation dual-axis tracking device further includes a deicing mechanism, which includes: Multiple first air bags provided outside the water storage bucket. Each first air bag is a strip-shaped structure extending along the axial direction of the rotating shaft; one first air bag is arranged between each water spray pipe and each dust suction pipe; Multiple scraping plates, with one scraping plate corresponding to each first airbag. Each scraping plate is a strip-shaped structure arranged along the axial direction of the rotating shaft. One end of each scraping plate is connected to the corresponding first airbag, and the other end extends radially along the rotating shaft. One side of the scraping plate is slidably connected to the adjacent water spray pipe along the radial direction of the rotating shaft. Each scraping plate is arranged such that when the first airbag is not inflated, the distance between the other end of the scraping plate and the axis of the rotating shaft is less than the distance between the axis of the rotating shaft and the solar panel; when the first airbag is inflated, the distance between the other end of the scraping plate and the axis of the rotating shaft is equal to the distance between the axis of the rotating shaft and the solar panel.

[0008] Preferably, in the photovoltaic double-axis tracking device, the deicing mechanism further includes a second airbag, which is an annular structure provided around the end of the water storage bucket. The second airbag is connected to an air pump provided on the end face of the water storage bucket; each first airbag is communicated with the second airbag.

[0009] Preferably, in the photovoltaic double-axis tracking device, the deicing mechanism further includes an icing sensor provided on the glass plate for detecting the icing thickness on the glass plate; the icing sensor is connected to the controller. The controller receives the icing signal detected by the icing sensor. When the icing thickness reaches the preset ice layer thickness threshold, the controller controls the air pump to start and inflate the first airbag and the second airbag. After the inflation is completed, the controller controls the motor to start.

[0010] Preferably, in the photovoltaic double-axis tracking device, a chute extending in the width direction is provided on one side of the mounting frame, and a slider is slidably provided in the chute. One side of the support plate is connected to the slider.

[0011] The present invention has at least the following beneficial effects: 1. On the basis of the existing double-axis tracking device, the present invention is provided with a cleaning mechanism that can be used to clean the outer surface of the solar panel. When it is necessary to clean the solar panel, the rotary drive assembly is used to rotate the mounting frame and the solar panel to an angle where the side in the width direction of the mounting frame is inclined downward. The motor is started to drive the rotating shaft to rotate, thereby driving the dust suction bucket and the water storage bucket to roll relative to the solar panel along the width direction of the mounting frame. At the same time, the dust suction component is turned on and the water valve is opened, so that during the rolling process, the dust suction pipe sucks dust, the water spray pipe sprays water, and the cleaning brush wipes dirt. The combination of the three cleaning methods realizes the efficient cleaning of the solar panel and will not cause scraping damage to the solar panel. 2. A glass plate is provided above the solar panel in the present invention. The glass plate is made of glass, which can ensure the normal absorption of sunlight by the solar panel and at the same time protect the solar panel. The object to be cleaned by the cleaning mechanism is the glass plate, which ensures the cleanliness of the upper surface of the glass plate, and thus ensures the full absorption of sunlight by the solar panel; 3. In the present invention, a first photosensitive sensor is arranged inside the glass plate, and a second photosensitive sensor is arranged outside. In cooperation with the controller, the corresponding cleaning method can be selected according to the pollution degree of the upper surface of the glass plate, which can save energy and avoid energy waste while cleaning the upper surface of the glass plate.

[0012] Other advantages, objectives and features of the present invention will be partially reflected by the following description and partially understood by those skilled in the art through the research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of the photovoltaic double-axis tracking device described in one technical solution of the present invention; Figure 2 It is a schematic structural diagram of the mounting rack and the cleaning mechanism described in another technical solution of the present invention; Figure 3 It is a top view of the mounting rack and the cleaning mechanism described in another technical solution of the present invention; Figure 4 It is a side view of the rotating shaft, the dust suction bucket, the water storage bucket, the dust suction pipe, the water spraying pipe, the cleaning brush and the deicing mechanism described in another technical solution of the present invention.

[0014] Description of the reference numerals in the drawings: 1 - base; 2 - column; 3 - mounting 3; 4 - solar panel; 51 - rack; 52 - dust suction bucket; 521 - dust suction pipe; 53 - rotating shaft; 531 - gear disc; 54 - support plate; 541 - motor; 55 - water storage bucket; 551 - water spraying pipe; 56 - cleaning brush; 6 - glass plate; 71 - first airbag; 72 - scraper. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The following further detailed description of the present invention is made in conjunction with the drawings and embodiments, so that those skilled in the art can implement it according to the description in the specification.

[0016] It should be understood that the terms such as "having", "including" and "comprising" used herein do not exclude the existence or addition of one or more other elements or their combinations.

[0017] It should be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial channels unless otherwise specified.

[0018] In the description of the present invention, the orientation or positional relationship indicated by terms such as "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present invention.

[0019] As Figures 1 - 4 shown, the present invention provides a photovoltaic double-axis tracking device, which includes a base 1, a column 2 rotatably provided on the base 1, a cross beam rotatably provided on the column 2, and a mounting bracket 3 provided on the cross beam. A solar panel 4 is provided on the mounting bracket 3; a cleaning mechanism is provided on the mounting bracket 3, which includes: A pair of racks 51, which are provided on both sides in the length direction of the mounting bracket 3 and are symmetrically located on both sides of the solar panel 4 respectively; each rack 51 extends along the width direction of the mounting bracket 3; A dust suction bucket 52, which is arranged above the solar panel 4 along the length direction of the mounting bracket 3, and a dust suction component is provided in the dust suction bucket 52; A pair of rotating shafts 53, which are respectively coaxially provided at both ends of the dust suction bucket 52, and a gear disc 531 is fixedly sleeved on each rotating shaft 53, and each gear disc 531 meshes with the corresponding rack 51; A support plate 54, which is slidably arranged on one side of the mounting bracket 3 along the width direction of the mounting bracket 3, and a motor 541 is provided on the support plate 54, and the output shaft of the motor 541 is coaxially connected to the end of one of the rotating shafts 53; A water storage bucket 55, which is coaxially sleeved outside the dust suction bucket 52; A plurality of dust suction pipe groups, which are arranged at intervals along the circumferential direction of the dust suction bucket 52. Each dust suction pipe group includes a plurality of dust suction pipes 521 arranged at intervals along the axial direction of the dust suction bucket 52. One end of each dust suction pipe 521 is connected to the dust suction component, and the other end sequentially passes through the side wall of the dust suction bucket 52, the water storage bucket 55 along the radial direction of the dust suction bucket 52, and extends to the outside of the water storage bucket 55; A plurality of water spray pipe groups, one water spray pipe group is arranged on one side of each dust suction pipe group. Each water spray pipe group includes a plurality of water spray pipes 551 arranged at intervals along the axial direction of the rotating shaft 53. One end of each water spray pipe 551 is communicated with the inside of the water storage bucket 55, and the other end extends radially outward of the water storage bucket 55 and is provided with a nozzle with a water valve; A plurality of cleaning brushes 56, with one cleaning brush 56 provided on the other side of each dust suction pipe group. Each cleaning brush 56 is an arc-shaped structure with its center of the circle located on the axis of the rotating shaft 53. The outer circle radius of the cleaning brush 56 is not less than (equal to or greater than 0.2 cm, and the cleaning brush is made of a water-absorbing sponge externally coated with an anti-static dust-free cloth on one side and has a certain extrusion elasticity) the distance between the axis of the rotating shaft 53 and the solar panel 4; the distance between the other end of each water spray pipe 551 and the axis of the rotating shaft 53, and the distance between the other end of each dust suction pipe 521 and the axis of the rotating shaft 53 are both less than the distance between the axis of the rotating shaft 53 and the solar panel 4.

[0020] In the above technical solution, the present invention provides a photovoltaic power generation dual-axis tracking device, which includes a base 1 for installation on the ground (or other installation stations), a column 2 rotatably provided on the base 1, a cross beam rotatably provided on the column 2, and a mounting bracket 3 provided on the cross beam. The column 2 and the cross beam are rotatably connected through a slewing drive. The slewing drive is selected from a toothed slewing drive or a worm and gear slewing drive in the prior art. That is, the angle adjustment method of the mounting bracket 3 and the solar panel 4 in the present invention can be achieved by means of the prior art. The present invention is provided with a cleaning mechanism on the basis of the existing dual-axis tracking device, which can be used to clean the outer surface (sun-facing surface) of the solar panel 4. Specifically, the cleaning mechanism includes a pair of racks 51 provided on both sides ( Figure 3 in the left-right direction) of the mounting bracket 3. Each rack 51 extends along the width direction of the mounting bracket 3. Above (outside) the solar panel 4, a dust suction barrel 52 is provided along the length direction of the mounting bracket 3. The axis of the dust suction barrel 52 is perpendicular to the rack 51. A dust suction component for dust suction is provided in the dust suction barrel 52. A rotating shaft 53 is coaxially and fixedly connected to each end face of the dust suction barrel 52. Each rotating shaft 53 extends along the length direction of the mounting bracket 3 and is perpendicular to the rack 51. The free ends of the pair of rotating shafts 53 extend to the positions corresponding to the pair of racks 51. A gear disc 531 is fixedly sleeved on the free end of the rotating shaft 53. Each gear disc 531 meshes with the corresponding rack 51. The rotation of the gear disc 531 on the rack 51 can drive the rotating shaft 53 to roll relative to the solar panel 4 along the width direction of the mounting bracket 3, thereby driving the dust suction barrel 52 to roll; on one side of the mounting bracket 3 (one side of the mounting bracket 3 spaced along the length direction), a support plate 54 is slidably provided along its width direction, that is, the support plate 54 can move relative to the mounting bracket 3 along the width direction of the mounting bracket 3 ( Figure 3Move in the vertical direction (as shown), with the free end of one rotating shaft 53 coaxially connected to the output shaft of a motor 541 provided on the support plate 54 (a motor 541 that can reciprocate forward and reverse is selected to drive the dust suction bucket 52 and the water storage bucket 55 to roll back and forth on the solar panel 4). Starting the motor 541 can drive the rotating shaft 53 to rotate, and it can move forward in a rolling manner under the cooperation of the gear disk 531 and the rack 51. A water storage bucket 55 is coaxially sleeved outside the dust suction bucket 52. Preferably, the water storage bucket 55 is provided with a water inlet, and a cover is provided on the water inlet, and the cover can be regularly opened to add water into the water storage bucket 55 through the water inlet. Further, a plurality of dust suction pipe groups are arranged at intervals in the circumferential direction of the dust suction bucket 52. Each dust suction pipe group includes a plurality of dust suction pipes 521 arranged at intervals in the axial direction of the dust suction bucket 52. One end of each dust suction pipe 521 is connected to the dust suction component, and the other end passes through the side wall of the dust suction bucket 52 in the radial direction of the dust suction bucket 52, penetrates the water storage bucket 55 and extends radially outward to the outside of the water storage bucket 55. Starting the dust suction component can suck dust and other dirt on the upper surface of the glass plate 6 through the dust suction pipes 521. A water spray pipe group is correspondingly arranged on one side of each dust suction pipe group. Each water spray pipe group includes a plurality of water spray pipes 551 arranged at intervals in the axial direction of the water storage bucket 55. One end of each water spray pipe 551 is communicated with the inside of the water storage bucket 55, and the other end passes through the side wall of the water storage bucket 55 in the radial direction of the water storage bucket 55 and extends to the outside of the water storage bucket 55. A nozzle with a water valve (preferably an electromagnetic water valve) is provided at the other end of each water spray pipe 551, and the water spray pipe 551 can spray water on the upper surface of the solar panel 4. A cleaning brush 56 is arranged on the other side of each dust suction pipe group. Its length along the axial direction of the water storage bucket 55 is not less than the length of the solar panel 4 (the length along the length direction of the mounting plate). The cross-section of the cleaning brush 56 along the radial direction of the water storage bucket 55 is an arc-shaped ring structure with the center of the circle located on the axis of the rotating shaft 53 (which is also the axis of the water storage bucket 55). The inner ring wall is arranged on the circumferential side surface of the water storage bucket 55, and the outer circle radius is not less than the distance between the axis of the rotating shaft 53 and the solar panel 4, so that during the rotation of the rotating shaft 53, the outer ring wall of the cleaning brush 56 can contact the upper surface of the solar panel 4 to realize scraping and cleaning of the solar panel 4. Preferably, it is made of a water-absorbing sponge inside and covered with an anti-static dust-free cloth on one side, and forms an arc-shaped structure adapted to the circumferential side surface of the water storage bucket 55;The outer radius dimension of the cleaning brush 56, the dimensions of the water spray pipe 551 and the dust suction pipe 521 are defined such that during the cleaning operation (when the motor 541 is started, the rotating shaft 53 rotates, driving the water storage bucket 55, the dust suction bucket 52, multiple dust suction pipes 521, multiple water spray pipes 551 and multiple cleaning brushes 56 to roll along the width direction of the mounting frame 3), the water spray pipe 551 can spray water onto the upper surface of the solar panel 4, the dust suction pipe 521 can suck dust and other dirt on the solar panel 4, and the cleaning brush 56 can contact the upper surface of the solar panel 4 to wipe the upper surface of the solar panel 4, while the water spray pipe 551 and the dust suction pipe 521 will not scrape the solar panel 4.;

[0021] The photovoltaic double-axis tracking device provided by the present invention can efficiently clean the outer surface of the solar panel 4 (which is also the upper surface described above and the sunny side), and at the same time will not cause scraping damage to the solar panel 4, ensuring the full absorption of sunlight by the solar panel 4.

[0022] In practical applications, when it is necessary to clean the solar panel 4, check whether there is water in the water storage bucket 55, replenish water into the water storage bucket 55 in time, use the rotary drive assembly to rotate the mounting frame 3 and the solar panel 4 to an angle where the side of the mounting frame 3 in the width direction is inclined downward, start the motor 541 to drive the rotating shaft 53 to rotate, and then drive the dust suction bucket 52 and the water storage bucket 55 to roll along the width direction of the mounting frame 3 relative to the solar panel 4. At the same time, turn on the dust suction component and open the water valve to realize that during the rolling process, the dust suction pipe 521 sucks dust, the water spray pipe 551 sprays water, and the cleaning brush 56 wipes the dirt, combining three cleaning methods to achieve efficient cleaning of the solar panel 4 without causing scraping damage to the solar panel 4.

[0023] Preferably, to ensure the stability of the rolling movement of the rotating shaft 53, the dust suction bucket 52 and the water storage bucket 55, a side plate can be provided on the other side of the mounting frame 3, a moving block is arranged on the side plate along the width direction of the mounting frame 3, and the free end of another rotating shaft 53 is rotatably arranged on the moving block; Further, the specific installation method of the dust suction component is listed: each dust suction pipe group is divided into two parts along the axial direction of the dust suction bucket 52, a dust suction component is provided at each end of the dust suction bucket 52, the dust suction component at least includes a dust suction bag, a dust suction motor, an impeller. Air outlets are respectively arranged on the end faces of the two ends of the dust suction bucket 52, the dust suction motor is arranged on the inner wall of the end face of the dust suction bucket 52, the output shaft of the motor 541 extends along the axial direction of the dust suction bucket 52 towards the middle of the dust suction bucket 52, the impeller is arranged on the output shaft of the dust suction motor, the dust suction bag is located on the side of the impeller away from the dust suction motor, and an exhaust hole is provided at one end of the dust suction bag close to the impeller. One end of the dust suction pipe 521 is communicated with the corresponding dust suction bag (adjacent).

[0024] In another technical solution, in the photovoltaic power generation two-axis tracking device, a glass plate 6 is provided above the solar panel 4, and the glass plate 6 is located between a pair of racks 51. The outer circle radius of the cleaning brush 56 is not less than the distance between the axis of the rotating shaft 53 and the glass plate 6; the distance between the other end of each water spray pipe 551 and the axis of the rotating shaft 53, and the distance between the other end of each dust suction pipe 521 and the axis of the rotating shaft 53 are both less than the distance between the axis of the rotating shaft 53 and the glass plate 6. A glass plate 6 is provided above the solar panel 4. Made of glass, it can ensure the normal absorption of sunlight by the solar panel 4 and at the same time protect the solar panel 4. The object cleaned by the cleaning mechanism is the glass plate 6, which ensures the cleanliness of the upper surface of the glass plate 6, and thus ensures the full absorption of sunlight by the solar panel 4.

[0025] In another technical solution, in the photovoltaic power generation two-axis tracking device, a first photosensitive sensor is provided inside the glass plate 6, and a second photosensitive sensor is provided outside. The cleaning mechanism further includes a controller, which is connected to the motor 541, the dust suction assembly, the water valve, the first photosensitive sensor, and the second photosensitive sensor; the controller receives the first optical signal detected by the first photosensitive sensor and the second optical signal detected by the second photosensitive sensor, and calculates the optical signal difference between the first optical signal and the second optical signal. When the optical signal difference is greater than the first set threshold, the controller controls the motor 541 and the dust suction assembly to start, otherwise it does not start; when the optical signal difference is greater than the second set threshold, the controller controls the motor 541, the dust suction assembly, and the water valve to start; the second set threshold is greater than the first set threshold. The controller is also connected to the rotary driver. Before starting the cleaning operation, the controller controls the rotary driver to rotate the mounting plate and the solar panel 4 to a state where the side where the width of the mounting plate is located is inclined downward.

[0026] In the above technical solution, photosensitive sensors are arranged both inside and outside the glass plate 6. The photosensitive sensors are used to detect the light brightness signal. The detection signals of the first photosensitive sensor arranged inside and the second photosensitive sensor arranged outside are compared, the light signal difference is calculated, the magnitude of the light signal difference is judged, and the pollution degree of the upper surface of the glass plate 6 is judged. If the light signal difference is greater than the first set threshold, it indicates that the upper surface of the glass plate 6 belongs to the first-level pollution. The controller controls the motor 541 and the dust suction assembly to start. The motor 541 drives the rotating shaft 53 to rotate, and the dust suction assembly drives the dust suction pipe 521 to suck dust. The rotation of the rotating shaft 53 drives multiple dust suction pipe groups and multiple cleaning brushes 56 to move forward in a rolling manner. During the forward movement, the cooperation of the dust suction pipe 521 and the cleaning brush 56 can suck and wipe the dust and other dirt on the upper surface of the glass plate 6. When the light signal difference is greater than the first set threshold, it indicates that the upper surface of the glass plate 6 belongs to the second-level pollution. The controller controls the motor 541, the dust suction assembly and the water valve to start. The motor 541 drives the rotating shaft 53 to rotate, the dust suction assembly drives the dust suction pipe 521 to suck dust, and the water valve controls the nozzle of the water spraying pipe 551 to open. Under the triple cooperation of the dust suction of the dust suction pipe 521, the water spraying of the water spraying pipe 551 and the wiping of the cleaning brush 56, the upper surface of the glass plate 6 can be efficiently cleaned. By setting the photosensitive sensor and the controller, the corresponding cleaning method can be selected according to the pollution degree of the upper surface of the glass plate 6, which can save energy and avoid energy waste while cleaning the upper surface of the glass plate 6.

[0027] In another technical solution, the photovoltaic double-axis tracking device further includes a deicing mechanism, which includes: A plurality of first air bags 71, which are arranged outside the water storage bucket 55. Each first air bag 71 is a strip-shaped structure extending along the axial direction of the rotating shaft 53; a first air bag 71 is arranged between each water spraying pipe 551 and each dust suction pipe 521; A plurality of scraping plates 72. One scraping plate 72 is correspondingly arranged for each first air bag 71. Each scraping plate 72 is a strip-shaped structure arranged along the axial direction of the rotating shaft 53. One end of each scraping plate 72 is connected to the corresponding first air bag 71, and the other end extends along the radial direction of the rotating shaft 53. One side of the scraping plate 72 is slidably connected to the adjacent water spraying pipe 551 along the radial direction of the rotating shaft 53; each scraping plate 72 is arranged such that when the first air bag 71 is not inflated, the distance between the other end of the scraping plate 72 and the axis of the rotating shaft 53 is less than the distance between the axis of the rotating shaft 53 and the glass plate 6; when the first air bag 71 is inflated, the distance between the other end of the scraping plate 72 and the axis of the rotating shaft 53 is equal to the distance between the axis of the rotating shaft 53 and the glass plate 6.

[0028] In winter when the weather is freezing, a water film may form on the upper surface of the glass plate 6 and freeze. The freezing will cause the solar panel 4 to have a reduced ability to absorb solar light, thereby affecting the power generation efficiency of the solar panel 4. Therefore, it is necessary to timely remove the ice layer on the upper surface of the glass plate 6. Thus, the present technical solution further provides a deicing mechanism, which includes a plurality of first airbags 71. The first airbags 71 are arranged outside the water storage bucket 55. Each first airbag 71 is a strip-shaped structure extending along the axial direction of the rotating shaft 53. A first airbag 71 is arranged between each water spraying pipe 551 and the dust suction pipe 521. Each first airbag 71 is correspondingly provided with a scraping plate 72. The long side of each scraping plate 72 extends along the axial direction of the rotating shaft 53, and the short side extends along the radial direction of the rotating shaft 53. One side of the scraping plate 72 is slidably connected to the corresponding water spraying pipe 551 (a plurality of water spraying pipes 551 arranged at intervals along the axial direction of the rotating shaft 53) along the radial direction of the rotating shaft 53, that is, the scraping plate 72 can move along the radial direction of the rotating shaft 53. The lengths of the long sides of the first airbag 71 and the scraping plate 72 are preferably set to be not less than the length of the glass plate 6 (the length along the length direction of the mounting frame 3) to ensure that the scraping plate 72 can effectively remove the ice layer on the glass plate 6. The lengths of the short sides of the first airbag 71 and the scraping plate 72 are preferably set such that when the first airbag 71 is not inflated, the distance between the free end of the short side of the scraping plate 72 and the axis of the rotating shaft 53 is less than the distance between the axis of the rotating shaft 53 and the upper surface of the glass plate 6, and the scraping plate 72 will not contact the upper surface of the glass plate 6 when rotating with the rotating shaft 53. When the second airbag is inflated, the scraping plate 72 is pushed radially outwards. Under the limit of the sliding connection between the scraping plate 72 and the water spraying pipe 551, the scraping plate 72 moves radially outwards along the rotating shaft 53. At this time, the distance between the free end of the short side of the scraping plate 72 and the axis of the rotating shaft 53 is not less than the distance between the axis of the rotating shaft 53 and the upper surface of the glass plate 6, and the scraping plate 72 can contact the upper surface of the glass plate 6 when rotating with the rotating shaft 53 to break the ice layer on the glass plate 6, and the broken ice slag is scraped and cleaned under the action of the cleaning brush 56. The scraping plate 72 is preferably made of silica gel. The distance between the free end of the short side of the scraping plate 72 and the axis of the rotating shaft 53 after the first airbag is inflated is preferably set to be equal to or slightly greater than (0.2 cm) the distance between the axis of the rotating shaft 53 and the upper surface of the glass plate 6. The first airbag has a certain extrusion elasticity. When the scraping plate contacts the ice layer on the upper surface of the glass plate, the free end of the scraping plate will retract a certain distance. Under the pushing action of the first airbag, the free end of the scraping plate contacts the ice layer and maintains a certain contact force to achieve scraping and breaking the ice layer.

[0029] In another technical solution, for the photovoltaic power generation dual-axis tracking device, the de-icing mechanism further includes a second airbag, which is an annular structure disposed around the end of the water storage bucket 55. The second airbag is connected to an air inflation pump disposed on the end surface of the water storage bucket 55; each first airbag 71 is communicated with the second airbag. The second airbag is provided to communicate all the first airbags 71 with the second airbag and connect the second airbag to the air inflation pump. Starting the air inflation pump can inflate all the first airbags 71 by inflating the second airbag.

[0030] In another technical solution, for the photovoltaic power generation dual-axis tracking device, the de-icing mechanism further includes an icing sensor disposed on the glass plate 6, which is used to detect the icing thickness on the glass plate 6; the icing sensor is connected to the controller, and the controller receives the icing signal detected by the icing sensor. When the icing thickness reaches the preset ice layer thickness threshold, the controller controls the air inflation pump to start and inflate the first airbag 71 and the second airbag. After the inflation is completed, the controller controls the motor 541 to start. In the above technical solution, the de-icing mechanism further includes an icing sensor disposed on the upper surface of the glass plate 6, which is used to detect the icing thickness signal on the upper surface of the glass plate 6 in winter icing weather. When the icing thickness exceeds the preset ice layer thickness threshold (such as 0.5 cm), the controller controls the air inflation pump to start and inflate the second airbag and all the first airbags, pushing the scraping plate 72 radially outward. Subsequently, the motor 541 is started. Driven by the motor 541, the rotating shaft 53 rolls forward above the glass plate 6. During the movement, the scraping plate 72 rotates with the rotating shaft 53 to the bottom and can contact the upper surface of the glass plate 6, breaking the ice layer on the upper surface of the glass plate 6. As a preferred technical solution, a heating element can also be disposed in the water storage bucket 55. When the icing thickness reaches the preset ice layer thickness threshold, the controller controls the heating element to start and heat the water in the water storage bucket 55. While controlling the motor 541 to start, the water valve on the water spraying pipe 551 is controlled to open, and hot water can be sprayed on the ice layer on the upper surface of the glass plate 6, cooperating with the scraping plate 72 to accelerate the ice layer breaking rate.

[0031] In another technical solution, for the photovoltaic power generation dual-axis tracking device, a chute extending in the width direction is provided on one side of the mounting frame 3, and a slider is slidably disposed in the chute. One side of the support plate 54 is connected to the slider. Through the cooperation design of the chute and the slider, the sliding connection between the support plate 54 and the mounting frame 3 is realized.

[0032] The equipment quantities and processing scales described here are used to simplify the description of the present invention. Applications, modifications, and variations of the present invention are obvious to those skilled in the art.

[0033] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those skilled in the art, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the examples shown and described herein.

Claims

1. A dual-axis tracking device for photovoltaic power generation, which comprises a base, a column rotatably arranged on the base, a cross beam rotatably arranged on the column, and a mounting bracket arranged on the cross beam, and a solar panel is arranged on the mounting bracket; characterized in that, A cleaning mechanism is provided on the mounting frame, which includes: A pair of racks, which are arranged on both sides of the mounting frame in the length direction and are symmetrically located on both sides of the solar panel respectively; each rack extends in the width direction of the mounting frame; A dust suction bucket, which is arranged above the solar panel along the length direction of the mounting frame, and a dust suction component is provided inside the dust suction bucket; A pair of rotating shafts, which are coaxially arranged at both ends of the dust suction bucket respectively, and a gear disc is fixedly sleeved on each rotating shaft, and each gear disc meshes with the corresponding rack; A support plate, which is slidably arranged on one side of the mounting frame along the width direction of the mounting frame, and a motor is provided on the support plate, and the output shaft of the motor is coaxially connected to the end of one of the rotating shafts; A water storage bucket, which is coaxially sleeved outside the dust suction bucket; A plurality of dust suction pipe groups, which are arranged at intervals along the circumferential direction of the dust suction bucket, and each dust suction pipe group includes a plurality of dust suction pipes arranged at intervals along the axial direction of the dust suction bucket. One end of each dust suction pipe is connected to the dust suction component, and the other end sequentially passes through the side wall of the dust suction bucket, the water storage bucket along the radial direction of the dust suction bucket, and extends outside the water storage bucket; A plurality of water spray pipe groups, and one water spray pipe group is arranged on one side of each dust suction pipe group. Each water spray pipe group includes a plurality of water spray pipes arranged at intervals along the axial direction of the rotating shaft. One end of each water spray pipe is communicated with the inside of the water storage bucket, and the other end extends radially outward of the water storage bucket and is provided with a nozzle with a water valve; A plurality of cleaning brushes, and one cleaning brush is arranged on the other side of each dust suction pipe group. Each cleaning brush is an arc-shaped structure with the center of the circle located on the axis of the rotating shaft, and the outer radius of the cleaning brush is not less than the distance between the axis of the rotating shaft and the solar panel; the distance between the other end of each water spray pipe and the axis of the rotating shaft and the distance between the other end of each dust suction pipe and the axis of the rotating shaft are both less than the distance between the axis of the rotating shaft and the solar panel.

2. The photovoltaic power generation biaxial tracking device according to claim 1, wherein A glass plate is provided above the solar panel, and the glass plate is located between the pair of racks.

3. The photovoltaic double-axis tracking device according to claim 2, characterized in that, A first photosensitive sensor is provided inside the glass plate, and a second photosensitive sensor is provided outside; The cleaning mechanism further includes a controller, which is connected to the motor, the dust suction component, the water valve, the first photosensitive sensor, and the second photosensitive sensor; the controller receives the first optical signal detected by the first photosensitive sensor and the second optical signal detected by the second photosensitive sensor, and calculates the optical signal difference between the first optical signal and the second optical signal. When the optical signal difference is greater than the first set threshold, the controller controls the motor and the dust suction component to start, otherwise it does not start; when the optical signal difference is greater than the second set threshold, the controller controls the motor, the dust suction component, and the water valve to start; The second set threshold is greater than the first set threshold.

4. The photovoltaic power generation two-axis tracking device according to claim 3, wherein, An ice removal mechanism is further included, which includes: A plurality of first air bags, which are arranged outside the water storage bucket, and each first air bag is a strip-shaped structure extending along the axial direction of the rotating shaft; one first air bag is arranged between each water spray pipe and each dust suction pipe; Multiple scraping plates, with one scraping plate corresponding to each first airbag. Each scraping plate is a strip-shaped structure arranged along the axial direction of the rotating shaft. One end of each scraping plate is connected to the corresponding first airbag, and the other end extends radially along the rotating shaft. One side of the scraping plate is slidably connected to the adjacent water spray pipe along the radial direction of the rotating shaft; each scraping plate is arranged such that when the first airbag is not inflated, the distance between the other end of the scraping plate and the axis of the rotating shaft is less than the distance between the axis of the rotating shaft and the solar panel; when the first airbag is inflated, the distance between the other end of the scraping plate and the axis of the rotating shaft is equal to the distance between the axis of the rotating shaft and the solar panel.

5. The photovoltaic double-axis tracking device according to claim 4, wherein The deicing mechanism further includes a second airbag, which is an annular structure provided around the end of the water storage bucket. The second airbag is connected to an air pump provided on the end face of the water storage bucket; each first airbag is communicated with the second airbag.

6. The photovoltaic double-axis tracking device according to claim 5, wherein, The deicing mechanism further includes an icing sensor provided on the glass plate, which is used to detect the thickness of the ice on the glass plate; the icing sensor is connected to the controller. The controller receives the icing signal detected by the icing sensor. When the icing thickness reaches the preset ice layer thickness threshold, the controller controls the air pump to start and inflate the first airbag and the second airbag. After the inflation is completed, the controller controls the motor to start.

7. The photovoltaic power generation dual-axis tracking device according to claim 6, wherein, One side of the mounting bracket is provided with a chute extending in the width direction, and a slider is slidably arranged in the chute. One side of the support plate is connected to the slider.

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