A snow-proof photovoltaic support and its usage method

Abstract

The present invention relates to the technical field of photovoltaic frames, and specifically to a snow-proof photovoltaic bracket and a usage method thereof, which includes a motor, an iron core, a column and a rainproof cloth; a unwinding roller is arranged below the left side of the photovoltaic panel; a wire winding tube is arranged below the right side of the photovoltaic panel, a pulling wire is wound on the wire winding tube, the pulling wire is fixedly connected with the rainproof cloth, a first sliding groove is formed in the wire winding tube, a first sliding rod is slidably matched in the first sliding groove, a first electromagnet is fixedly arranged at the inner end of the first sliding rod, the outer end of the first sliding rod is fixedly connected with the inner wall of the first sliding groove through a first spring, and the first electromagnet is controlled by a controller. By using this application, the photovoltaic panel can be covered by the rainproof cloth when it is snowing and retracted after the snow stops, so as to effectively avoid the accumulation of snow on the photovoltaic panel, and thus there is no need for workers to manually remove the snow, reducing the time and physical strength consumed by the workers.

Description

Technical Field

[0001] The present invention belongs to the technical field of photovoltaic brackets, and more specifically, it is a snow-proof photovoltaic bracket and its usage method. Background Art

[0002] A photovoltaic bracket, also known as a solar photovoltaic bracket, is a special bracket designed to place, install, and fix photovoltaic panels in a solar photovoltaic power generation system.

[0003] Among them, when the existing photovoltaic brackets are set up, they only serve to support the photovoltaic panels. When it snows, the snow will cover the photovoltaic panels, thereby blocking the photovoltaic panels and causing the photovoltaic panels to be unable to generate electricity normally. Therefore, it is necessary to remove the snow on the photovoltaic panels. The existing cleaning method is manual cleaning by workers. Since the photovoltaic panels are often arranged in rows of hundreds of meters and multiple rows are set up, it is time-consuming and laborious for the staff to clean them. Summary of the Invention

[0004] The present invention provides a snow-proof photovoltaic bracket to solve the defects in the prior art.

[0005] The present invention is achieved through the following technical solutions:

[0006] A snow-proof photovoltaic bracket includes a fixedly arranged motor, an iron core coaxially and fixedly connected to the motor shaft, a column supporting the corresponding photovoltaic panel, and a rainproof cloth that can cover the corresponding photovoltaic panel; a winding roller for winding the rainproof cloth is arranged below the left side of the photovoltaic panel. The winding roller is pin-connected to the column and a torsion spring is arranged between the winding roller and the column; a wire winding tube that can rotate along its axis is arranged below the right side of the photovoltaic panel. A wire is wound around the wire winding tube, and the wire is fixedly connected to the rainproof cloth. One end of the iron core passes through all the wire winding tubes and is provided with a rotation sensor. The rotation sensor is signal-connected to a controller. The motor is controlled by the controller. A first sliding groove is opened in the wire winding tube, and a first sliding rod is slidably fitted in the first sliding groove. A first electromagnet is fixedly arranged at the inner end of the first sliding rod. The outer end of the first sliding rod is fixedly connected to the inner wall of the first sliding groove through a first spring. The first electromagnet is controlled by the controller. The length of the first sliding rod is greater than the distance between the inner wall of the wire winding tube and the iron core. A reverse rotation locking structure controlled by the controller is also arranged below the photovoltaic panel. When the wire winding tube is locked by the reverse rotation locking mechanism, it can only rotate clockwise and can rotate counterclockwise after unlocking.

[0007] When this application is in use and not working, under the action of the elastic force of the first spring, the first electromagnet moves away from the iron core. When it snows, the motor is started. The clockwise rotation of the motor shaft drives the iron core to rotate. The number of turns of the iron core rotation is measured by the rotation sensor and transmitted to the controller. At the same time, when the motor starts to rotate, the controller controls the power supply to the first electromagnet in the outermost winding tube, so that the first electromagnet generates magnetic attraction and adsorbs on the iron core. Then, the rotation of the iron core drives the first electromagnet to rotate along the axis of the iron core. The rotation of the first electromagnet drives the rotation of the first sliding rod, and through the first sliding rod, the winding tube is driven to rotate. The rotation of the winding tube realizes the winding of the pulling wire. The winding of the pulling wire pulls the unwinding roller to release the rainproof cloth, so that the rainproof cloth moves upward from the bottom on the photovoltaic panel and covers the photovoltaic panel. The snow accumulates on the rainproof cloth. In the other winding tubes, under the action of the first spring, the first electromagnet moves away from the iron core, so the iron core idles in the corresponding winding tube. After the motor shaft rotates a certain number of turns, the controller controls the power-off of the first electromagnet and the power-on of another first electromagnet behind the winding tube. Thus, the front-side winding tube stops winding, and the rear-side winding tube starts to wind and works in turn until all the photovoltaic panels are covered. Then the motor stops working. Among them, when the winding tube stops rotating, under the action of the reverse rotation locking mechanism, the winding tube is prevented from reversing. After the snow stops, the controller is used to control the reverse rotation locking mechanism to stop locking. Thus, under the action of the torsion spring of the unwinding roller, the rainproof cloth moves downward from the top and synchronously returns to the initial position. The snow accumulated on the rainproof cloth falls off and exposes the photovoltaic panel.

[0008] Among them, in the present invention, when unwinding, it is unwound one by one. Therefore, the required rotational force will not be too large, and thus a high-power motor does not need to be used, and the motor load can be reduced. When winding, since the motor does not need to work anymore, synchronous winding can be achieved through the torsion spring, and the photovoltaic panel can be quickly exposed, so that the photovoltaic panel can quickly start working.

[0009] Preferably, the reverse rotation locking mechanism includes a first ratchet fixedly sleeved on the winding tube. One side of the first ratchet is fixedly provided with a cross bar. A second sliding groove is transversely formed in the cross bar. A second sliding rod is slidably fitted in the second sliding groove. The second sliding rod is a magnetically attractive metal. A second electromagnet is fixedly arranged in the second sliding groove. The inner end of the second sliding rod is fixedly connected to the second sliding groove through a second spring. The outer end of the second sliding rod is provided with a first pawl cooperating with the first ratchet. When unwinding, when the rotating tube rotates clockwise, the second spring pushes the second sliding rail, so that the first pawl cooperates with the first ratchet. Then, under the limitation of the first pawl, it can only rotate clockwise. When it is necessary to wind the rainproof cloth, the second electromagnet is started. The second electromagnet attracts the second sliding rod, so that the first pawl moves away from the first ratchet. Then, the first pawl can rotate counterclockwise and will not hinder the winding.

[0010] Preferably, the end of the rainproof cloth is longitudinally fixedly connected with a round tube, the round tube is fixedly connected with the pull wire, one end of the round tube is closed and the other end is connected with the gas supply device through a spring tube, and the round tube is provided with a plurality of air outlets facing the photovoltaic panel along its longitudinal direction. Under the action of the gas supply device, the gas passes through the spring tube and the round tube and is ejected from the air outlet, so that when unwinding, the function of blowing dust and foreign matter on the photovoltaic panel can be started to prevent foreign matter from damaging the rainproof cloth, and when rewinding, the snow remaining on the photovoltaic panel can be blown off, which facilitates the normal operation of the photovoltaic panel.

[0011] Preferably, the air supply equipment includes a fixedly installed air intake pipe, an inner tube rotating along its axis is coaxially arranged inside the air intake pipe, air intake fan blades are fixedly arranged along the outer wall of the inner tube, a rotating rod rotating along its axis is coaxially arranged inside the inner tube, the outer end of the rotating rod is located outside the air intake pipe and is sleeved with a driven gear, a driving gear meshing with the driven gear is sleeved on the winding tube, the diameter of the driving gear is larger than the diameter of the driven gear, the rotating rod is sleeved with front and rear ratchet wheels located on both sides of the air intake pipe and with opposite ratchet directions, a second ratchet pawl cooperating with the corresponding front and rear ratchet wheels is provided on the inner wall of the inner tube, a spring tube is connected in the middle of the air intake pipe, and one-way valves for air intake toward the middle are provided on both sides of the air intake pipe. When the unwinding roller is unwinding, the rotation of the winding tube drives the driving gear to rotate clockwise, and the driving gear drives the driven gear to rotate counterclockwise, thereby driving the rotating rod to rotate counterclockwise. The counterclockwise rotation of the rotating rod drives the front ratchet and the rear ratchet to rotate. Under the limitation of the second ratchet, the front ratchet drives the front inner tube to rotate, and the rear ratchet rotates idly along the rear inner tube. The rotation of the inner tube drives the corresponding air intake fan blade to rotate, so that air is taken into the air intake pipe and flows through the air intake pipe into the spring tube under the limitation of the corresponding one-way valve. When the unwinding roller is rewinding, the rotation of the winding tube drives the driving gear to rotate counterclockwise, and the driving gear drives the driven gear to rotate clockwise, thereby The rotating rod is driven to rotate clockwise, and the clockwise rotation of the rotating rod drives the front ratchet and the rear ratchet to rotate. Under the limitation of the second ratchet, the rear ratchet drives the rear inner tube to rotate, and the front ratchet rotates idly along the front inner tube. The rotation of the rear inner tube drives the corresponding air intake fan blades to rotate, so that air is taken into the air intake pipe and flows into the spring tube through the air intake pipe under the limitation of the corresponding one-way valve, so that the dust and snow removal of the photovoltaic panel can be achieved with the help of the rotational force generated by the motor and the torsion spring, without the need to provide a separate gas supply equipment, thus saving energy. The diameter of the driving gear is larger than the diameter of the driven gear, so that the fan blades can rotate quickly and more air can enter.

[0012] Preferably, both ends of the air inlet pipe are bell-shaped with a wide outer opening and a narrow inner opening, and the inner pipe is located in the bell-shaped opening. The bell-shaped opening can not only accommodate larger fan blades and allow more gas to enter, but also the gas flows from the wide opening into the narrow opening, the flow rate is accelerated, and better impact force can be achieved.

[0013] Preferably, a bearing is sleeved on the rotating rod, an outer ring of the bearing is fixedly connected to one end of a connecting rod, and the other end of the connecting rod is fixedly connected to the outer wall of the inner tube.

[0014] A method for using a snow-proof photovoltaic support includes the following steps:

[0015] (1) When it is snowing, start the motor. The clockwise rotation of the motor shaft drives the iron core to rotate. Among them, the number of turns of the iron core rotation is measured by the rotation sensor and transmitted to the controller. At the same time, when the motor starts to rotate, the controller controls the power supply of the first electromagnet in the frontmost winding tube. Thus, the first electromagnet generates magnetic attraction and adsorbs on the iron core. Furthermore, the rotation of the iron core drives the first electromagnet to rotate along the axis of the iron core. The rotation of the first electromagnet drives the rotation of the first sliding rod. The rotation of the first sliding rod drives the rotation of the winding tube. The rotation of the winding tube realizes the winding of the pulling wire. The winding of the pulling wire pulls the unwinding roller to release the rainproof cloth. Thus, the rainproof cloth moves upward from the bottom on the photovoltaic panel and covers the photovoltaic panel. In the other winding tubes, under the action of the first spring, the first electromagnet moves away from the iron core. Therefore, the iron core idles in the corresponding winding tube. After the motor shaft rotates a certain number of turns, the controller controls the power-off of the first electromagnet and the power-on of another first electromagnet behind the winding tube. Thus, the front winding tube stops winding, and the rear winding tube starts to wind and works in turn until all the photovoltaic panels are covered. Then the motor stops working. Among them, when the winding tube stops rotating, under the action of the first pawl and the first ratchet, the ratchet is prevented from reversing, and further the winding tube is prevented from reversing;

[0016] (2) After the snow stops, start the second electromagnet. The second electromagnet generates magnetic attraction and drives the second sliding rod to move. Thus, it attracts and holds the second sliding rod and compresses the second spring. The movement of the second sliding rod drives the movement of the first pawl, making the first pawl disengage from the first ratchet. Thus, under the action of the torsion spring of the unwinding roller, the rainproof cloth moves downward from the top and synchronously returns to the initial position. The snow on the rainproof cloth falls off and exposes the photovoltaic panel;

[0017] (3) When the unwinding roller unwinds, the rotation of the winding tube drives the driving gear to rotate clockwise. The driving gear drives the driven gear to rotate counterclockwise. Furthermore, it drives the rotating rod to rotate counterclockwise. The counterclockwise rotation of the rotating rod drives the rotation of both the front ratchet and the rear ratchet. Under the limitation of the second pawl, the front ratchet drives the front inner tube to rotate, and the rear ratchet idles along the rear inner tube. The rotation of the inner tube drives the corresponding intake fan blade to rotate. Thus, air enters the intake pipe and, under the limitation of the corresponding one-way valve, the air flow enters the spring tube through the intake pipe, enters the round tube through the spring tube, and sprays out from the air outlet holes in the round tube to realize the dust removal of the photovoltaic panel;

[0018] When the unwinding roller winds up, the rotation of the winding tube drives the driving gear to rotate counterclockwise. The driving gear drives the driven gear to rotate clockwise, which in turn drives the rotating rod to rotate clockwise. The clockwise rotation of the rotating rod drives both the front ratchet and the rear ratchet to rotate. Under the limitation of the second pawl, the rear ratchet drives the rear inner tube to rotate, and the front ratchet idles along the front inner tube. The rotation of the rear inner tube drives the corresponding intake fan blades to rotate, so that air enters the intake pipe. Under the limitation of the corresponding one-way valve, the air flow enters the spring tube through the intake pipe, enters the round tube through the spring tube, and sprays out from the air outlet holes in the round tube, realizing jet blowing of the snow remaining on the photovoltaic panel.

[0019] The beneficial effects of the present invention are as follows: By using this application, firstly, the rainproof cloth can cover the photovoltaic panel when it snows and be retracted after the snow stops, effectively avoiding snow accumulation on the photovoltaic panel, thus eliminating the need for manual snow cleaning by workers and reducing the time and physical effort consumed by workers. On the premise of meeting the above objectives, when unwinding, it is unwound one by one. Therefore, the required rotational force is not too large, so a high-power motor is not needed, and the motor load can be reduced. When winding up, since the motor no longer needs to work, synchronous winding can be achieved through the torsion spring, enabling the photovoltaic panel to be quickly exposed, and then the photovoltaic panel can quickly start working. In addition, by means of the rotational force generated by the motor and the torsion spring, dust removal and snow removal of the photovoltaic panel can be realized without the need to separately provide a gas supply device, saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 is a structural schematic diagram of the present invention;

[0022] Figure 2 is an arrangement schematic diagram of the winding tubes;

[0023] Figure 3 is a distribution schematic diagram of the first electromagnet;

[0024] Figure 4 is Figure 2 a partial enlarged view of I of

[0025] Figure 5 is a structural schematic diagram of the first ratchet;

[0026] Figure 6 is a cooperation schematic diagram of the front ratchet and the inner tube.

[0027] As shown in the figure:

[0028] 1. Motor, 2. Iron core, 3. Rainproof cloth, 4. Photovoltaic panel, 5. Unwinding roller, 6. Winding tube, 7. Pulling wire, 8. First chute, 9. First sliding rod, 10. First electromagnet, 11. First spring, 12. First ratchet, 13. Second sliding rod, 14. Second spring, 15. Second electromagnet, 16. Round tube, 17. Air inlet pipe, 18. Inner tube, 19. Front ratchet, 20. Air inlet fan blade, 21. Rotating rod, 22. Driving gear, 23. Driven gear, 24. Baffle, 25. Check valve, 26. Bell mouth, 27. Connecting rod. Detailed implementation manner

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] A photovoltaic bracket for preventing snow accumulation, as Figures 1-6 shown. It includes a motor 1 fixedly arranged on a column, an iron core 2 fixedly connected coaxially with the rotating shaft of the motor 1, a column supporting the corresponding photovoltaic panel 4, and a rainproof cloth 3 that can cover the corresponding photovoltaic panel 4. The rainproof cloth is an anti-freezing rainproof cloth.

[0031] Below the left side of the photovoltaic panel 4, there is an unwinding roller 5 for winding the rainproof cloth 3. The unwinding roller 5 is rotationally connected to the column through a pin shaft, and a torsion spring is arranged between the unwinding roller 5 and the column, so that the torsion spring is tightened when the unwinding roller 5 unwinds; below the right side of the photovoltaic panel 4, there is a wire winding tube. Vertically downward from the bottom surface of the photovoltaic panel 4, there is a vertical plate. A through hole through which the wire winding tube passes is opened on the vertical plate, and the through hole and the wire winding tube are rotationally connected through a bearing. Two pulling wires 7 are wound on the wire winding tube. The pulling wires 7 are located at both ends of the wire winding tube. The pulling wires 7 are fixedly connected to the rainproof cloth 3. The iron core 2 is coaxially arranged with the wire winding tube, and one end of the iron core 2 passes through all the wire winding tubes and is fixedly provided with a rotation sensor. The rotation sensor is signal-connected to the controller, and the motor 1 is controlled by the controller.

[0032] Three first chutes 8 are evenly opened along the circumferential direction of the inner wall of the wire winding tube. A first sliding rod 9 is slidably fitted in the first chute 8. The inner end of the first sliding rod 9 is fixedly provided with a first electromagnet 10. The outer end of the first sliding rod 9 is fixedly connected to the inner wall of the first chute 8 through a first spring 11. The first electromagnet 10 is controlled by the controller. The length of the first sliding rod 9 is greater than the distance between the inner wall of the winding tube 6 and the iron core 2.

[0033] A reverse rotation locking structure controlled by a controller is also provided below the photovoltaic panel 4. When the winding tube 6 is locked by the reverse rotation locking mechanism, it can only rotate clockwise and can rotate counterclockwise after unlocking. The reverse rotation locking mechanism includes a first ratchet 12 fixedly sleeved on the winding tube 6. A cross bar is provided on one side of the first ratchet 12. The cross bar is vertically connected to a vertical rod, and the vertical rod is fixedly arranged on the photovoltaic panel 4. A second sliding groove is transversely formed in the cross bar. A second sliding rod 13 is slidably fitted in the second sliding groove. The second sliding rod 13 is a magnetically attracted metal. A second electromagnet 15 is fixedly arranged in the second sliding groove. The inner end of the second sliding rod 13 and the second sliding groove are fixedly connected by a second spring 14. A first pawl cooperating with the first ratchet 12 is provided at the outer end of the second sliding rod 13.

[0034] When this application is in use, first, it is determined how many turns the iron core 2 needs to rotate to completely cover the photovoltaic panel 4, and then based on this number of turns, it is controlled by the controller. When not working, the first electromagnet 10 moves away from the iron core 2 under the elastic force of the first spring 11. When it snows, the motor 1 is started. The clockwise rotation of the rotating shaft of the motor 1 drives the iron core 2 to rotate. Among them, the number of turns of the rotation of the iron core 2 is measured by the rotation sensor and transmitted to the controller. At the same time, when the motor 1 starts to rotate, the controller controls the first electromagnet 10 in the frontmost winding tube 6 to be powered, so that the first electromagnet 10 generates magnetic attraction and adsorbs on the iron core 2. Furthermore, the rotation of the iron core 2 drives the first electromagnet 10 to rotate along the axis of the iron core 2. The rotation of the first electromagnet 10 drives the rotation of the first sliding rod 9, and drives the winding tube 6 to rotate through the first sliding rod 9. The rotation of the winding tube 6 realizes the winding of the pull wire 7. The winding of the pull wire 7 pulls the unwinding roller 5 to release the rainproof cloth 3, so that the rainproof cloth 3 moves upward from the bottom on the photovoltaic panel 4 and covers the photovoltaic panel 4. The snow accumulates on the rainproof cloth 3. In the other winding tubes 6, the first electromagnet 10 moves away from the iron core 2 under the action of the first spring 11. Therefore, the iron core 2 idles in the corresponding winding tube 6. After the rotating shaft of the motor 1 rotates a certain number of turns, the controller controls the first electromagnet 10 to be powered off and another first electromagnet 10 behind the winding tube 6 to be powered on. Thus, the front-side winding tube 6 stops winding, and the rear-side winding tube 6 starts to wind and works in sequence until all the photovoltaic panels 4 are completely covered, and then the motor 1 stops working.

[0035] Among them, when the winding tube 6 stops rotating, under the action of the reverse rotation locking mechanism, it prevents the winding tube 6 from rotating in reverse. After the snow stops, the controller is used to control the reverse rotation locking mechanism to stop locking. Thus, under the action of the torsion spring of the unwinding roller 5, the rainproof cloth 3 moves downward from top to bottom and synchronously returns to the initial position, and the snow accumulated on the rainproof cloth 3 falls off and exposes the photovoltaic panel 4.

[0036] The working principle of the reverse rotation locking mechanism is as follows: during unwinding, when the rotating tube rotates clockwise, the second spring 14 pushes the second slide rail, causing the first pawl to cooperate with the first ratchet 12. As a result, it can only rotate clockwise under the limitation of the first pawl. When it is necessary to wind up the rainproof cloth 3, the second electromagnet 15 is activated. The second electromagnet 15 attracts the second slide bar 13, causing the first pawl to move away from the first ratchet 12. Thus, the first pawl can rotate counterclockwise without hindering the winding.

[0037] In the present invention, during unwinding, it is unwound one by one. Therefore, the required rotational force is not too large, so there is no need to use a high-power motor 1, and the load on the motor 1 can be reduced. During winding, since the motor 1 is no longer needed to work, synchronous winding can be achieved through a torsion spring, enabling the photovoltaic panel 4 to be quickly exposed, and thus the photovoltaic panel 4 can quickly start working.

[0038] A circular tube 16 is longitudinally fixedly connected to the end of the rainproof cloth 3. The circular tube 16 is fixedly connected to the pull wire 7. One end of the circular tube 16 is closed and the other end is communicated with a gas supply device through a spring tube. The circular tube 16 is provided with several air outlets facing the photovoltaic panel 4 along its longitudinal direction. Under the action of the gas supply device, gas passes through the spring tube and the circular tube 16 and is ejected from the air outlets. Thus, during unwinding, it can start to blow dust and foreign objects on the photovoltaic panel 4 to prevent foreign objects from scratching the rainproof cloth 3. At the same time, during winding, it can blow the remaining snow on the photovoltaic panel 4 away, facilitating the normal operation of the photovoltaic panel 4.

[0039] The described air supply device includes a fixed intake pipe 17. Inside the intake pipe 17, there is a coaxial inner pipe 18 that rotates along its axis. Along the outer wall of the inner pipe 18, there are fixed intake fan blades 20. Inside the inner pipe 18, there is a coaxial rotating rod 21. The outer end of the rotating rod 21 is rotationally connected to a pull rod through a bearing, and the pull rod is fixedly arranged on the back of the photovoltaic panel 4. A driven gear 23 is sleeved on the part of the rotating rod 21 outside the intake pipe 17. On the winding pipe 6, there is a driving gear 22 that meshes with the driven gear 23, and the diameter of the driving gear 22 is larger than that of the driven gear 23. The rotating rod 21 is sleeved with a front ratchet 19 and a rear ratchet on both sides of the intake pipe 17 with opposite ratchet tooth directions. On the inner wall of the inner pipe 18, there are second pawls that cooperate with the corresponding front ratchet 19 and rear ratchet. In the middle of the intake pipe 17, there is a connecting spring pipe, and on both sides of the intake pipe 17, there are one-way valves 25 that intake air towards the middle. When the unwinding roller 5 unwinds, the rotation of the winding pipe 6 drives the driving gear 22 to rotate clockwise. The driving gear 22 drives the driven gear 23 to rotate counterclockwise, thereby driving the rotating rod 21 to rotate counterclockwise. The counterclockwise rotation of the rotating rod 21 drives both the front ratchet 19 and the rear ratchet to rotate. Under the limitation of the second pawl, the front ratchet 19 drives the front inner pipe 18 to rotate, and the rear ratchet idles along the rear inner pipe 18. The rotation of the inner pipe 18 drives the corresponding intake fan blades 20 to rotate, so that air enters the intake pipe 17 and, under the limitation of the corresponding one-way valve 25, the air flow enters the spring pipe through the intake pipe 17. When the unwinding roller 5 winds, the rotation of the winding pipe 6 drives the driving gear 22 to rotate counterclockwise. The driving gear 22 drives the driven gear 23 to rotate clockwise, thereby driving the rotating rod 21 to rotate clockwise. The clockwise rotation of the rotating rod 21 drives both the front ratchet 19 and the rear ratchet to rotate. Under the limitation of the second pawl, the rear ratchet drives the rear inner pipe 18 to rotate, and the front ratchet idles along the front inner pipe 18. The rotation of the rear inner pipe 18 drives the corresponding intake fan blades 20 to rotate, so that air enters the intake pipe 17 and, under the limitation of the corresponding one-way valve 25, the air flow enters the spring pipe through the intake pipe 17. Thus, by means of the rotational force generated by the motor 1 and the torsion spring, dust removal and snow removal of the photovoltaic panel 4 can be realized without separately providing a gas supply device, saving energy. And since the diameter of the driving gear 22 is larger than that of the driven gear 23, the fan blades can rotate quickly, allowing more air flow to enter.

[0040] Both ends of the described intake pipe 17 are flared mouths 26 that are wider outside and narrower inside, and the inner pipe 18 is located inside the flared mouth 26. The flared mouth 26 can not only accommodate larger fan blades and allow more gas to enter, but also the gas enters from the wide mouth and flows into the narrow mouth, accelerating the flow rate and enabling better impact force.

[0041] Preferably, a bearing is sleeved on the rotating rod 21. The outer ring of the bearing is fixedly connected to one end of a connecting rod 27, and the other end of the connecting rod 27 is fixedly connected to the outer wall of the inner pipe 18.

[0042] The circular tube 16 is vertically connected upward with a baffle 24. The baffle 24 is provided with ventilation holes along its thickness direction. The baffle 24 can ensure that when the rainproof cloth 3 is retracted, it can push and pull the snow accumulation to prevent the snow from remaining on the photovoltaic panel 4, and the ventilation holes reduce the resistance when the baffle 24 moves upward.

[0043] A method for using a photovoltaic support for preventing snow accumulation includes the following steps:

[0044] (1) When it is snowing, start the motor 1. The clockwise rotation of the rotating shaft of the motor 1 drives the iron core 2 to rotate. The number of turns of the rotation of the iron core 2 is measured by the rotation sensor and transmitted to the controller. At the same time, when the motor 1 starts to rotate, the controller controls the power supply of the first electromagnet 10 in the frontmost winding tube 6. Thus, the first electromagnet 10 generates magnetic attraction and adsorbs on the iron core 2. Furthermore, the rotation of the iron core 2 drives the first electromagnet 10 to rotate along the axis of the iron core 2. The rotation of the first electromagnet 10 drives the rotation of the first slide rod 9. The rotation of the first slide rod 9 drives the winding tube 6 to rotate. The rotation of the winding tube 6 realizes the winding of the pulling wire 7. The winding of the pulling wire 7 pulls the unwinding roller 5 to release the rainproof cloth 3. Thus, the rainproof cloth 3 moves upward from bottom to top on the photovoltaic panel 4 and covers the photovoltaic panel 4. Among the other winding tubes 6, under the action of the first spring 11, the first electromagnet 10 moves away from the iron core 2. Therefore, the iron core 2 idles in the corresponding winding tube 6. After the rotating shaft of the motor 1 rotates a certain number of turns, the controller controls the power-off of the first electromagnet 10 and the power-on of another first electromagnet 10 behind the winding tube 6. Thus, the front-side winding tube 6 stops winding, and the rear-side winding tube 6 starts to wind and works in sequence until all the photovoltaic panels 4 are completely covered. Then the motor 1 stops working. Among them, when the winding tube 6 stops rotating, under the action of the first pawl and the first ratchet 12, the ratchet is prevented from reversing, and further the winding tube 6 is prevented from reversing;

[0045] (2) After the snow stops, start the second electromagnet 15. The second electromagnet 15 generates magnetic attraction and drives the second slide rod 13 to move. Thus, it attracts and holds the second slide rod 13 and makes the second slide rod 13 compress the second spring 14. The movement of the second slide rod 13 drives the movement of the first pawl, so that the first pawl disengages from the first ratchet 12. Thus, under the action of the torsion spring of the unwinding roller 5, the rainproof cloth 3 moves downward from top to bottom and synchronously returns to the initial position, and the snow accumulated on the rainproof cloth 3 falls off and exposes the photovoltaic panel 4;

[0046] (3)When the unwinding roller 5 unwinds, the rotation of the winding tube 6 drives the driving gear 22 to rotate clockwise. The driving gear 22 drives the driven gear 23 to rotate counterclockwise, thereby driving the rotating rod 21 to rotate counterclockwise. The counterclockwise rotation of the rotating rod 21 drives both the front ratchet 19 and the rear ratchet to rotate. Under the limitation of the second pawl, the front ratchet 19 drives the front inner tube 18 to rotate, and the rear ratchet idles along the rear inner tube 18. The rotation of the inner tube 18 drives the corresponding intake fan blade 20 to rotate, so that air enters the intake pipe 17. Under the limitation of the corresponding one-way valve 25, the air flow enters the spring tube through the intake pipe 17, enters the circular tube 16 through the spring tube, and is ejected from the air outlet hole in the circular tube 16, realizing the dust removal of the photovoltaic panel 4;

[0047] (4)When the unwinding roller 5 winds up, the rotation of the winding tube 6 drives the driving gear 22 to rotate counterclockwise. The driving gear 22 drives the driven gear 23 to rotate clockwise, thereby driving the rotating rod 21 to rotate clockwise. The clockwise rotation of the rotating rod 21 drives both the front ratchet 19 and the rear ratchet to rotate. Under the limitation of the second pawl, the rear ratchet drives the rear inner tube 18 to rotate, and the front ratchet 19 idles along the front inner tube 18. The rotation of the rear inner tube 18 drives the corresponding intake fan blade 20 to rotate, so that air enters the intake pipe 17. Under the limitation of the corresponding one-way valve 25, the air flow enters the spring tube through the intake pipe 17, enters the circular tube 16 through the spring tube, and is ejected from the air outlet hole in the circular tube 16, realizing the blowing of the residual snow on the photovoltaic panel 4.

[0048] The beneficial effects of the present invention are as follows: By using the present application, first, the rainproof cloth 3 can cover the photovoltaic panel 4 when it snows and be retracted after the snow stops, so that the snow accumulation on the photovoltaic panel 4 can be effectively avoided, and thus there is no need for workers to manually remove the snow, reducing the time and physical strength consumed by the workers. On the premise of meeting the above objectives, when unwinding, it is unwound one by one. Therefore, the required rotational force is not too large, and thus there is no need to use a high-power motor 1, and the load of the motor 1 can be reduced. When winding up, since the motor 1 no longer needs to work, synchronous winding can be achieved through the torsion spring, realizing the rapid exposure of the photovoltaic panel 4, so that the photovoltaic panel 4 can quickly start working. In addition, by means of the rotational force generated by the motor 1 and the torsion spring, the dust removal and snow removal of the photovoltaic panel 4 can be realized, and there is no need to separately provide a gas supply device, saving energy.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A photovoltaic support for preventing snow accumulation, characterized in that: It includes a fixed motor, an iron core coaxially fixedly connected to the motor shaft, a column supporting the corresponding photovoltaic panel and a rainproof cloth that can cover the corresponding photovoltaic panel; a reel for winding the rainproof cloth is provided at the lower left side of the photovoltaic panel, the reel is connected to the column pin shaft and a torsion spring is provided between the reel and the column; a take-up tube that can rotate along its axis is provided at the lower right side of the photovoltaic panel, a pull wire is wound on the take-up tube, the pull wire is fixedly connected to the rainproof cloth, one end of the iron core passes through all the take-up tubes and is provided with a rotation sensor, the rotation sensor is connected with the controller signal, the motor is controlled by the controller, a first slide groove is provided in the take-up tube, a first slide rod is slidably matched in the first slide groove, a first electromagnet is fixedly provided at the inner end of the first slide rod, the outer end of the first slide rod is fixedly connected to the inner wall of the first slide groove by a first spring, the first electromagnet is controlled by the controller, the length of the first slide rod is greater than the distance between the inner wall of the take-up tube and the iron core, and a reverse rotation locking structure controlled by the controller is also provided at the bottom of the photovoltaic panel, when the reverse rotation locking mechanism is locked, the take-up tube can only rotate clockwise, and after unlocking The cam is provided with a plurality of air outlet holes along the longitudinal direction of the cam, and a plurality of air outlet holes are provided along the longitudinal direction of the cam. The cam is provided with an inner tube which rotates along its axis, and an air inlet fan blade is fixedly provided along the outer wall of the inner tube. A rotating rod which rotates along its axis is coaxially provided in the inner tube, and the outer end of the rotating rod is located outside the air inlet pipe and is sleeved with a driven gear. A driving gear which meshes with the driven gear is sleeved on the winding tube, and the diameter of the driving gear is larger than that of the driven gear. The rotating rod is sleeved with a front ratchet and a rear ratchet which are located on both sides of the air inlet pipe and have opposite ratchet directions. A second ratchet which cooperates with the corresponding front ratchet and rear ratchet is provided on the inner wall of the inner tube. A spring tube is connected in the middle of the air inlet pipe, and a one-way valve which intakes air toward the middle is provided on both sides of the air inlet pipe.

2. The anti-snow photovoltaic bracket according to claim 1, characterized in that: The reverse rotation locking mechanism includes a first ratchet fixedly sleeved on the winding tube, a cross bar fixedly arranged on one side of the first ratchet, a second slide groove transversely opened on the cross bar, a second slide bar slidingly fitted in the second slide groove, the second slide bar is magnetic metal, a second electromagnet is fixedly arranged in the second slide groove, the inner end of the second slide bar is fixedly connected to the second slide groove via a second spring, and the outer end of the second slide bar is provided with a first pawl cooperating with the first ratchet.

3. The anti-snow photovoltaic bracket according to claim 1, characterized in that: Both ends of the air intake pipe are bell-shaped mouths that are wide outside and narrow inside, and the inner pipe is located inside the bell-shaped mouths.

4. The anti-snow photovoltaic bracket according to claim 1, characterized in that: A bearing is sleeved on the rotating rod, an outer ring of the bearing is fixedly connected to one end of a connecting rod, and the other end of the connecting rod is fixedly connected to the outer wall of the inner tube.

5. A method for using the anti-snow photovoltaic bracket according to any one of claims 1 to 4, characterized in that: The following steps are involved: (1) When it snows, the motor is started, and the clockwise rotation of the motor shaft drives the iron core to rotate. The number of revolutions of the iron core is measured by the rotation sensor and transmitted to the controller. At the same time, when the motor starts to rotate, the controller controls the first electromagnet in the front winding tube to supply power, so that the first electromagnet generates magnetic attraction and adsorbs on the iron core. Then, the rotation of the iron core drives the first electromagnet to rotate along the axis of the iron core. The rotation of the first electromagnet drives the rotation of the first slide bar, and the winding tube is driven to rotate by the first slide bar. The rotation of the winding tube realizes the winding of the pull wire, and the winding of the pull wire pulls the unwinding roller to release the rainproof cloth, thereby The rainproof cloth moves from bottom to top on the photovoltaic panel and covers the photovoltaic panel, while in the remaining winding tubes, the first electromagnet is away from the iron core under the action of the first spring, so the iron core idles in the corresponding winding tube, and after the motor shaft rotates a certain number of times, the controller controls the first electromagnet to be powered off and another first electromagnet located behind the winding tube to be powered on, so that the front winding tube stops winding, and the rear winding tube starts winding and works in sequence until all photovoltaic panels are covered, and the motor stops working, wherein when the winding tube stops rotating, the first pawl and the first ratchet wheel prevent the ratchet wheel from reversing, thereby preventing the winding tube from reversing; (2) After the snow stops, the second electromagnet is started. The second electromagnet generates magnetic attraction to drive the second slide bar to move, thereby attracting the second slide bar and causing the second slide bar to compress the second spring. The movement of the second slide bar drives the first pawl to move, causing the first pawl to disengage from the first ratchet. As a result, under the action of the torsion spring of the unwinding roller, the rainproof cloth moves from top to bottom and synchronously returns to the initial position, and the snow on the rainproof cloth falls off and exposes the photovoltaic panel; (3) When the unwinding roller is unwinding, the rotation of the winding tube drives the driving gear to rotate clockwise, and the driving gear drives the driven gear to rotate counterclockwise, thereby driving the rotating rod to rotate counterclockwise. The counterclockwise rotation of the rotating rod drives the front ratchet and the rear ratchet to rotate. Under the limitation of the second ratchet, the front ratchet drives the front inner tube to rotate, and the rear ratchet rotates along the rear inner tube. The rotation of the inner tube drives the corresponding air intake fan blades to rotate, so that air is taken into the air intake pipe and flows into the spring tube through the air intake pipe under the limitation of the corresponding one-way valve, enters the round tube through the spring tube, and is ejected from the air outlet in the round tube, thereby achieving dust removal for the photovoltaic panel; (4) When the unwinding roller is reeling in, the rotation of the reeling tube drives the driving gear to rotate counterclockwise, and the driving gear drives the driven gear to rotate clockwise, thereby driving the rotating rod to rotate clockwise. The clockwise rotation of the rotating rod drives the front ratchet and the rear ratchet to rotate and under the limitation of the second ratchet, the rear ratchet drives the rear inner tube to rotate, and the front ratchet rotates along the front inner tube. The rotation of the rear inner tube drives the corresponding air intake fan blades to rotate, so that air is taken into the air intake pipe and flows into the spring tube through the air intake pipe under the limitation of the corresponding one-way valve, enters the round tube through the spring tube, and is ejected from the air outlet in the round tube, thereby realizing jet snow blowing for the snow remaining on the photovoltaic panel.

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