Snow accumulation prevention photovoltaic support and use method

Abstract

The invention relates to the technical field of photovoltaic supports, in particular to an anti-snow photovoltaic support and a using method thereof, and the anti-snow photovoltaic support comprises a motor, an iron core, a stand column and rainproof cloth; an unwinding roller is arranged below the left side of the photovoltaic panel; a take-up pipe is arranged below the right side of the photovoltaic panel, a pull wire is wound on the take-up pipe and fixedly connected with the rainproof cloth, a first sliding groove is formed in the take-up pipe, a first sliding rod is arranged in the first sliding groove in a sliding fit mode, a first electromagnet is fixedly arranged at the inner end of the first sliding rod, and 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. According to the application, firstly, the photovoltaic panel can be covered by the rainproof cloth during snowing and the rainproof cloth is retracted after snow stops, so that snow accumulation on the photovoltaic panel can be effectively avoided, manual snow removal by workers is not needed, and time and physical power consumed by the workers are reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of photovoltaic racks, and in particular to a photovoltaic rack for preventing snow accumulation and a use method thereof. Background Art Photovoltaic rack, also known as solar photovoltaic bracket, is a special bracket designed for placing, installing and fixing photovoltaic panels in solar photovoltaic power generation systems.

[0002] Among them, the existing photovoltaic racks only provide support for photovoltaic panels when they are set up. When it snows, the snow will cover the photovoltaic panels, thereby blocking the photovoltaic panels, which in turn causes the photovoltaic panels to be unable to generate electricity normally. For this reason, it is necessary to clear the snow on the photovoltaic panels, and the existing cleaning method is manual cleaning by workers. Because photovoltaic panels are often set up in a row of hundreds of meters and in multiple rows, it takes more time and energy for the workers to clean them. Summary of the invention

[0003] The present invention provides a photovoltaic support capable of preventing snow accumulation, so as to solve the defects in the prior art.

[0004] The present invention is achieved through the following technical solutions: A photovoltaic bracket for preventing snow accumulation, comprising a fixed motor, an iron core coaxially fixedly connected to a motor shaft, a column supporting a corresponding photovoltaic panel, and a rainproof cloth covering the corresponding photovoltaic panel; A reel for winding a rainproof cloth is provided at the lower left side of the photovoltaic panel, the reel is connected to the pin shaft of the column and a torsion spring is provided between the reel and the column; a wire 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 wire take-up tube, the pull wire is fixedly connected to the rainproof cloth, one end of the iron core passes through all the wire 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 wire take-up tube, a first slide rod is slidably fitted 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, the take-up tube can only rotate clockwise when the reverse rotation locking mechanism is locked, and can rotate counterclockwise after unlocking.

[0005] When the present application is in use, when not working, the first electromagnet is away from the iron core under the action of the first spring force. When it snows, the motor is started, and the clockwise rotation of the motor shaft drives the iron core to rotate, wherein 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, and then the rotation of the iron core drives the first electromagnet to rotate along the axis of the iron core, and 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, so that the rainproof cloth moves from bottom to top on the photovoltaic panel and covers the photovoltaic panel. , the accumulated snow falls on the rainproof cloth, and 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 cut off the power and the other first electromagnet located behind the winding tube to be energized, so that the front winding tube stops winding, and the rear winding tube starts winding and works in sequence until all photovoltaic panels are completely covered, and the motor stops working. When the winding tube stops rotating, the reverse rotation locking mechanism prevents the winding tube from reversing. After the snow stops, the reverse rotation locking mechanism is controlled by the controller to no longer lock, so that 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 falling on the rainproof cloth falls off and exposes the photovoltaic panel.

[0006] Among them, in the present invention, the unwinding is done one by one, so the required rotational force will not be too large, and there is no need to use a high-power motor, and the motor load can be reduced. When rewinding, since the motor is no longer needed to work, synchronous rewinding can be achieved through the torsion spring, and the photovoltaic panel can be quickly discharged, so that the photovoltaic panel can work quickly.

[0007] Preferably, the reverse rotation locking mechanism comprises a first ratchet wheel fixedly sleeved on the winding tube, a cross bar fixedly arranged on one side of the first ratchet wheel, a second slide slot transversely opened on the cross bar, a second slide bar slidingly matched in the second slide slot, the second slide bar is a magnetic metal, a second electromagnet is fixedly arranged in the second slide slot, the inner end of the second slide bar is fixedly connected to the second slide slot via a second spring, and a first pawl matched with the first ratchet wheel is arranged at the outer end of the second slide bar. When unwinding, when the rotating tube rotates clockwise, the second spring pushes the second slide rail, so that the first pawl matches with the first ratchet wheel, and then can only rotate clockwise under the limitation of the first pawl, and when the rainproof cloth needs to be rolled up, the second electromagnet is started, and the second electromagnet attracts the second slide bar, so that the first pawl is away from the first ratchet wheel, and then the first pawl can rotate counterclockwise without hindering the rolling up.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] A method for using a photovoltaic bracket to prevent snow accumulation comprises the following steps: (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.

[0013] The beneficial effects of the present invention are as follows: the use of the present application can firstly cover the photovoltaic panel with a rainproof cloth when it snows and retract it after the snow stops, thereby effectively avoiding the accumulation of snow on the photovoltaic panel, and eliminating the need for workers to manually clear the snow, thus reducing the time and physical effort consumed by the workers. Under the premise of meeting the above-mentioned purpose, the unwinding is done one by one, so the required rotational force will not be too large, and thus there is no need to use a high-power motor, and the motor load can be reduced. When rewinding, since the motor is no longer required to work, synchronous rewinding can be achieved through a torsion spring, and the photovoltaic panel can be quickly leaked out, so that the photovoltaic panel can work quickly. In addition, the rotational force generated by the motor and the torsion spring can be used to achieve dust removal and snow removal on the photovoltaic panel, without the need to provide a separate gas supply device, thus saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the arrangement of the winding tube; Figure 3 is a schematic diagram of the first electromagnet distribution; Figure 4 yes Figure 2 A partial enlarged view of I; Figure 5 is a schematic diagram of the first ratchet structure; Figure 6 This is a schematic diagram of the cooperation between the front ratchet and the inner tube. As shown in the figure: 1. Motor, 2. Iron core, 3. Rainproof cloth, 4. Photovoltaic panel, 5. Unwinding roller, 6. Winding tube, 7. Pull wire, 8. First slide slot, 9. First slide bar, 10. First electromagnet, 11. First spring, 12. First ratchet, 13. Second slide bar, 14. Second spring, 15. Second electromagnet, 16. Round tube, 17. Intake pipe, 18. Inner tube, 19. Front ratchet, 20. Intake fan blades, 21. Rotating rod, 22. Driving gear, 23. Driven gear, 24. Baffle, 25. One-way valve, 26. Bell mouth, 27. Connecting rod. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] A photovoltaic support for preventing snow accumulation, such as Figure 1-Figure 6 It includes a motor 1 fixedly mounted on a column, an iron core 2 coaxially fixedly connected to the rotating shaft of the motor 1, a column supporting a corresponding photovoltaic panel 4, and a rainproof cloth 3 covering the corresponding photovoltaic panel 4, wherein the rainproof cloth is an antifreeze type rainproof cloth.

[0018] A reel 5 for winding up the rainproof cloth 3 is provided at the lower left side of the photovoltaic panel 4. The reel 5 is rotatably connected to the column by a pin shaft and a torsion spring is provided between the reel 5 and the column, so that the torsion spring is tightened when the reel 5 is unwinding; a take-up tube is provided at the lower right side of the photovoltaic panel 4, and a vertical plate is vertically connected to the bottom surface of the photovoltaic panel 4 downward, and a through hole is opened on the vertical plate for the take-up tube to pass through, and the through hole is rotatably connected to the take-up tube by a bearing, and two pull wires 7 are wound on the take-up tube, and the pull wires 7 are located at both ends of the take-up tube, and the pull wires 7 are fixedly connected to the rainproof cloth 3, the iron core 2 is coaxially arranged with the take-up tube, and one end of the iron core 2 passes through all the take-up tubes and is fixedly provided with a rotation sensor, and the rotation sensor is connected to the controller signal, and the motor 1 is controlled by the controller.

[0019] Three first slide grooves 8 are evenly opened along the circumference of the inner wall of the wire taking-up tube, and a first slide rod 9 is slidably fitted in the first slide groove 8. A first electromagnet 10 is fixedly arranged at the inner end of the first slide rod 9. The outer end of the first slide rod 9 is fixedly connected to the inner wall of the first slide groove 8 by a first spring 11. The first electromagnet 10 is controlled by a controller, and the length of the first slide rod 9 is greater than the distance between the inner wall of the winding tube 6 and the iron core 2.

[0020] A reverse rotation locking structure controlled by a controller is also provided below the photovoltaic panel 4. When the reverse rotation locking mechanism is locked, the winding tube 6 can only rotate clockwise, and can rotate counterclockwise after being unlocked. 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 the vertical bar, the vertical bar is fixedly provided on the photovoltaic panel 4, a second slide groove is transversely provided on the cross bar, a second slide bar 13 is slidably matched in the second slide groove, the second slide bar 13 is a magnetic metal, a second electromagnet 15 is fixedly provided in the second slide groove, the inner end of the second slide bar 13 is fixedly connected to the second slide groove via a second spring 14, and the outer end of the second slide bar 13 is provided with a first pawl matched with the first ratchet 12.

[0021] When the present application is in use, it is first determined how many times the iron core 2 rotates to completely cover the photovoltaic panel 4, and then the controller is used based on the number of turns. When not working, the first electromagnet 10 is away from the iron core 2 under the elastic force of the first spring 11. When it snows, the motor 1 is started, and the clockwise rotation of the motor 1 shaft drives the iron core 2 to rotate, wherein the number of turns 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 front winding tube 6 to supply power, so that the first electromagnet 10 generates magnetic attraction and is adsorbed on the iron core 2, and then the rotation of the iron core 2 drives the first electromagnet 10 to rotate along the axis of the iron core 2, and the rotation of the first electromagnet 10 drives the rotation of the first slide bar 9, and the winding tube 6 is driven to rotate through the first slide bar 9, and the winding tube 6 is driven to rotate. The rotation realizes the winding of the pull wire 7, and 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 from bottom to top on the photovoltaic panel 4 and covers the photovoltaic panel 4, and the accumulated snow falls on the rainproof cloth 3. In the remaining winding tubes 6, the first electromagnet 10 is away from the iron core 2 under the action of the first spring 11, so the iron core 2 idles in the corresponding winding tube 6. After the motor 1 shaft rotates a certain number of times, the controller controls the first electromagnet 10 to cut off the power and the other first electromagnet 10 located behind the winding tube 6 to be energized, so that the front winding tube 6 stops winding, and the rear winding tube 6 starts winding and works in sequence until all photovoltaic panels 4 are covered, and the motor 1 stops working.

[0022] Among them, when the winding tube 6 stops rotating, the reverse rotation locking mechanism prevents the winding tube 6 from reversing. After the snow stops, the reverse rotation locking mechanism is controlled by the controller to no longer be locked, so that under the action of the torsion spring of the unwinding roller 5, the rainproof cloth 3 moves from top to bottom and returns to the initial position synchronously, and the accumulated snow on the rainproof cloth 3 falls off and exposes the photovoltaic panel 4.

[0023] The working principle of the reverse rotation locking mechanism is as follows: when unwinding, when the rotating tube rotates clockwise, the second spring 14 pushes the second slide rail, so that the first pawl cooperates with the first ratchet 12, and then can only rotate clockwise under the limitation of the first pawl. When the rainproof cloth 3 needs to be rolled up, the second electromagnet 15 is started, and the second electromagnet 15 attracts the second slide bar 13, so that the first pawl is away from the first ratchet 12, and then the first pawl can rotate counterclockwise without hindering the rolling.

[0024] Among them, in the present invention, the unwinding is done one by one, so the required rotational force will not be too large, and there is no need to use a high-power motor 1, and the load of the motor 1 can be reduced. When rewinding, since the motor 1 is no longer required to work, synchronous rewinding can be achieved through the torsion spring, and the photovoltaic panel 4 can be quickly leaked out, so that the photovoltaic panel 4 can work quickly.

[0025] The end of the rainproof cloth 3 is longitudinally fixedly connected with a round tube 16, which is fixedly connected to the pull wire 7. One end of the round tube 16 is closed and the other end is connected to the gas supply device through a spring tube. The round tube 16 is provided with a plurality of air outlets facing the photovoltaic panel 4 along its longitudinal direction. Under the action of the gas supply device, the gas passes through the spring tube and the round tube 16 and is ejected from the air outlet, so that when unwinding, the function of blowing dust and foreign matter on the photovoltaic panel 4 can be started to prevent foreign matter from damaging the rainproof cloth 3. At the same time, when rewinding, the snow remaining on the photovoltaic panel 4 can be blown off, which is convenient for the normal operation of the photovoltaic panel 4.

[0026] The air supply equipment includes a fixed air intake pipe 17, an inner tube 18 rotating along its axis is coaxially arranged inside the air intake pipe 17, an air intake fan blade 20 is fixedly arranged along its outer wall, a rotating rod 21 is coaxially arranged inside the inner tube 18, the outer end of the rotating rod 21 is rotatably connected to the pull rod through a bearing, the pull rod is fixedly arranged on the back of the photovoltaic panel 4, the rotating rod 21 is located on the outer side of the air intake pipe 17 and is sleeved with a driven gear 23, a driving gear 22 meshing with the driven gear 23 is sleeved on the winding tube 6, the driving gear 22 has a diameter larger than that of the driven gear 23, the rotating rod 21 is sleeved with a front ratchet 19 and a rear ratchet located on both sides of the air intake pipe 17 and with opposite ratchet directions, the inner wall of the inner tube 18 is provided with a second ratchet that cooperates with the corresponding front ratchet 19 and rear ratchet, a spring tube is connected in the middle of the air intake pipe 17, and a one-way valve 25 for air intake toward the middle is arranged on both sides of the air intake pipe 17. When the unwinding roller 5 is unwinding, the rotation of the winding tube 6 drives the driving gear 22 to rotate clockwise, and 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 the front ratchet 19 and the rear ratchet to rotate and under the limitation of the second ratchet, the front ratchet 19 drives the front inner tube 18 to rotate, and the rear ratchet rotates idly along the rear inner tube 18. The rotation of the inner tube 18 drives the corresponding air intake fan blade 20 to rotate, so that air is taken into the air intake pipe 17 and flows through the air intake pipe 17 into the spring tube under the limitation of the corresponding one-way valve 25; when the unwinding roller 5 is winding, the rotation of the winding tube 6 drives the driving gear 22 to rotate counterclockwise, and the driving gear 22 drives the driven gear 23 clockwise. Rotate, thereby drive the rotating rod 21 to rotate clockwise, the clockwise rotation of the rotating rod 21 drives the front ratchet 19 and the rear ratchet to rotate and under the limitation of the second ratchet, the rear ratchet drives the rear inner tube 18 to rotate, the front ratchet 19 idles along the front inner tube 18, and the rotation of the rear inner tube 18 drives the corresponding air intake fan blade 20 to rotate, so that air is taken into the air intake pipe 17 and flows through the air intake pipe 17 into the spring tube under the limitation of the corresponding one-way valve 25, so that the dust and snow removal of the photovoltaic panel 4 can be achieved with the help of the rotational force generated by the motor 1 and the torsion spring, without the need to provide a separate gas supply equipment, saving energy, and the diameter of the driving gear 22 is larger than the diameter of the driven gear 23, which can realize the rapid rotation of the fan blades and realize the entry of more airflow.

[0027] Both ends of the air inlet pipe 17 are bell mouths 26 that are wide outside and narrow inside, and the inner pipe 18 is located in the bell mouth 26. The bell mouth 26 can not only accommodate larger fan blades and allow more gas to enter, but also the gas enters the narrow mouth from the wide mouth, the flow rate is accelerated, and better impact force can be achieved.

[0028] Preferably, a bearing is sleeved on the rotating rod 21 , and 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 tube 18 .

[0029] The circular tube 16 is vertically connected with a baffle 24, which has ventilation holes along its thickness direction. The baffle 24 can push and pull the snow when the rainproof cloth 3 is retracted to prevent the snow from remaining on the photovoltaic panel 4, and the ventilation holes reduce the resistance of the baffle 24 when it moves upward.

[0030] A method for using a photovoltaic bracket to prevent snow accumulation comprises the following steps: (1) When it snows, the motor 1 is started, and the clockwise rotation of the motor 1 shaft drives the iron core 2 to rotate. The number of revolutions 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 front winding tube 6 to supply power, so that the first electromagnet 10 generates magnetic attraction and adsorbs on the iron core 2. Then, 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 bar 9, and the winding tube 6 is driven to rotate by the first slide bar 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, thereby The rainproof cloth 3 moves from bottom to top on the photovoltaic panel 4 and covers the photovoltaic panel 4, while in the remaining winding tubes 6, the first electromagnet 10 is away from the iron core 2 under the action of the first spring 11, so the iron core 2 idles in the corresponding winding tube 6, and after the motor 1 shaft rotates a certain number of times, the controller controls the first electromagnet 10 to be powered off and the other first electromagnet 10 located behind the winding tube 6 to be powered on, so that the front winding tube 6 stops winding, and the rear winding tube 6 starts winding and works in sequence until all the photovoltaic panels 4 are completely covered, and the motor 1 stops working, wherein when the winding tube 6 stops rotating, the first pawl and the first ratchet 12 prevent the ratchet from reversing, thereby preventing the winding tube 6 from reversing; (2) After the snow stops, the second electromagnet 15 is started. The second electromagnet 15 generates magnetic attraction to drive the second slide bar 13 to move, thereby attracting the second slide bar 13 and causing the second slide bar 13 to compress the second spring 14. The movement of the second slide bar 13 drives the first pawl to move, causing the first pawl to disengage from the first ratchet wheel 12. As a result, under the action of the torsion spring of the unwinding roller 5, the rainproof cloth 3 moves from top to bottom and synchronously returns to the initial position, and the snow on the rainproof cloth 3 falls off and exposes the photovoltaic panel 4. (3) When the unwinding roller 5 is unwinding, the rotation of the winding tube 6 drives the driving gear 22 to rotate clockwise, and 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 the front ratchet 19 and the rear ratchet to rotate. Under the limitation of the second ratchet pawl, the front ratchet 19 drives the front inner tube 18 to rotate, and the rear ratchet rotates along the rear inner tube 18. The rotation of the inner tube 18 drives the corresponding air intake fan blade 20 to rotate, so that air is taken into the air intake pipe 17 and flows into the spring tube through the air intake pipe 17 under the limitation of the corresponding one-way valve 25, enters the circular tube 16 through the spring tube, and is ejected from the air outlet in the circular tube 16, thereby realizing dust removal of the photovoltaic panel 4; (4) When the unwinding roller 5 is reeled in, the rotation of the reeling tube 6 drives the driving gear 22 to rotate counterclockwise, and 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 ratchet 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 air intake fan blades 20 to rotate, so that air is taken into the air intake pipe 17 and flows into the spring tube through the air intake pipe 17 under the limitation of the corresponding one-way valve 25, enters the circular tube 16 through the spring tube, and is ejected from the air outlet in the circular tube 16, thereby realizing jet snow blowing for the snow remaining on the photovoltaic panel 4.

[0031] The beneficial effects of the present invention are as follows: the use of the present application can firstly cover the photovoltaic panel 4 with the rainproof cloth 3 when it snows and retract it after the snow stops, thereby effectively avoiding the accumulation of snow on the photovoltaic panel 4, and eliminating the need for workers to manually clear the snow, thereby reducing the time and physical effort consumed by the workers. Under the premise of meeting the above-mentioned purpose, the unwinding is performed one by one, so the required rotational force will not be 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 rewinding, since the motor 1 is no longer required to work, synchronous rewinding can be achieved through the torsion spring, and the photovoltaic panel 4 can be quickly leaked out, so that the photovoltaic panel 4 can work quickly. In addition, the rotational force generated by the motor 1 and the torsion spring can be used to achieve dust removal and snow removal on the photovoltaic panel 4, without the need to provide a separate gas supply device, thereby saving energy.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the 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 covering the corresponding photovoltaic panel; A reel for winding a rainproof cloth is provided at the lower left side of the photovoltaic panel, the reel is connected to the pin shaft of the column and a torsion spring is provided between the reel and the column; a wire 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 wire take-up tube, the pull wire is fixedly connected to the rainproof cloth, one end of the iron core passes through all the wire 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 wire take-up tube, a first slide rod is slidably fitted 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, the take-up tube can only rotate clockwise when the reverse rotation locking mechanism is locked, and can rotate counterclockwise after unlocking.

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 2, characterized in that: A round tube is fixedly connected to the end of the rainproof cloth longitudinally, and the round tube is fixedly connected to the pull wire. One end of the round tube is closed and the other end is connected to the air supply equipment through a spring tube. The round tube is provided with several air outlets facing the photovoltaic panel along its longitudinal direction.

4. The anti-snow photovoltaic bracket according to claim 3, characterized in that: The air supply equipment includes a fixed air intake pipe, an inner pipe 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 pipe, a rotating rod rotating along its axis is coaxially arranged inside the inner pipe, 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 a front ratchet and a rear ratchet located on both sides of the air intake pipe and with opposite ratchet directions, a second ratchet pawl cooperating with the corresponding front ratchet and rear ratchet is arranged on the inner wall of the inner pipe, a spring tube is connected in the middle of the air intake pipe, and one-way valves for air intake toward the middle are arranged on both sides of the air intake pipe.

5. The anti-snow photovoltaic bracket according to claim 4, 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.

6. The anti-snow photovoltaic bracket according to claim 4, 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.

7. A method for using the anti-snow photovoltaic bracket according to any one of claims 1 to 6, 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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