Desertification area ecological restoration equipment based on photovoltaic power station

Abstract

A photovoltaic power station-based desertification area ecological restoration device of the present invention comprises a photovoltaic power generation assembly, the photovoltaic power generation assembly comprises a photovoltaic support, a photovoltaic panel, a control unit and a power storage unit, and a sunshade area below the photovoltaic panel is used for planting sand prevention plants. The top end of the photovoltaic panel is provided with a flushing pipe used for flushing the surface of the photovoltaic panel, the flushing pipe is connected with a shunt pipe, the lower end of the photovoltaic panel is provided with a collecting tank, and the ground is provided with drip irrigation pipes used for irrigating sand-proof plants; the temperature difference between air above the earth surface and the underground heat exchange pipe is utilized, water in the air is condensed into small water drops to be stored in the water storage container, irrigation water and photovoltaic panel flushing water are provided for sand-proof plants, and the flushing water is collected in the collecting tank, treated through the backflow device and then flows back to the water storage container. The water in the natural state is used for irrigating the sand prevention plants, the water resource utilization rate is high, and the problem of water resource shortage in the desertification area is solved.

Description

Technical Field

[0001] The invention relates to the technical field of ecological restoration, and in particular to an ecological restoration device for desertified areas based on a photovoltaic power station. Background Art

[0002] Arid desert areas generally have little precipitation, high evaporation, strong wind and sand activities, difficult plant growth, and fragile ecological environment, resulting in high governance costs, great difficulty in governance, and low governance efficiency. Photovoltaic sand control, as a new technology model for desert governance developed in recent years, makes full use of the characteristics of photovoltaic modules such as shading, rain collection, and reduced evaporation, and optimizes the combination with existing engineering sand fixation and plant sand fixation technologies. It can not only protect photovoltaic power generation facilities from sand damage and realize ecological restoration of the station area, but also establish a good ecological barrier for the downstream of the wind and sand, bringing new inspiration to promote the integrated development of energy and ecology.

[0003] "Planting with water" is one of the principles that my country's plant sand control has long generally followed. Water is the most prominent limiting factor in ecological governance in arid desert areas, and photovoltaic sand control is no exception. Water resources in arid desert areas are extremely scarce, and the surface water or groundwater resources available in these areas for vegetation restoration are extremely limited, which brings great challenges to photovoltaic sand control. A large number of engineering practices have shown that the effect of sand control can be improved by planting sand control plants, but the amount of water resources consumed is also large. At the same time, photovoltaic panels are easily covered by sand, resulting in reduced power generation efficiency, requiring frequent water flushing, and limited water resources are difficult to support water demand. Lack of water supply for vegetation will lead to reduced survival rate or decay and death during drought periods. Existing water-saving irrigation technologies such as drip irrigation and micro-spraying have improved the efficiency of water resource utilization to a certain extent, but they still cannot fundamentally solve the problem of insufficient water resources caused by planting sand control plants, and it is difficult for vegetation to transition from artificial irrigation to water irrigation in a natural state. Therefore, there is an urgent need for an ecological restoration device for desertified areas based on photovoltaic power stations to solve the problems existing in the existing technology. Summary of the invention

[0004] The embodiment of the present invention provides an ecological restoration device for desertified areas based on a photovoltaic power station, which can solve the problems in the prior art of lack of water resources in desertified areas and difficulty in transitioning vegetation from artificial irrigation to natural water irrigation.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: an ecological restoration device for desertified areas based on a photovoltaic power station, comprising a photovoltaic power generation component, the photovoltaic power generation component comprising a photovoltaic bracket, a photovoltaic panel, a control unit and a power storage unit, the sunshade area below the photovoltaic panel is used to plant sand-proof plants, characterized in that: a flushing pipe for flushing the surface of the photovoltaic panel is provided at the top of the photovoltaic panel, the flushing pipe is connected to a shunt pipe, a collecting trough is provided at the lower end of the photovoltaic panel, and a drip irrigation pipe for irrigating sand-proof plants is arranged on the ground;

[0006] It also includes a water storage container arranged below the ground, a reflux device is arranged between the collecting tank and the water storage container, the water storage container is connected to a water pump electrically connected to the power storage unit, the water pump is connected to a main pipe connected to the shunt pipe and the drip irrigation pipe, and the shunt pipe and the drip irrigation pipe are respectively provided with an electric control valve electrically connected to the power storage unit;

[0007] The water storage container is provided with a heat exchange tube extending out of the ground, the upper end of the heat exchange tube is provided with an air intake hood, and the interior of the air intake hood is provided with a negative pressure fan electrically connected to the power storage unit.

[0008] Preferably, the air intake hood comprises an umbrella-shaped shell, and the umbrella-shaped shell is provided with air intake holes.

[0009] Preferably, the reflux device includes an outer shell, an inner filter cartridge, a spiral conveying shaft, a reflux pipe, a filter cloth and a driving unit, the outer shell is arranged below the collecting tank, the filter cloth is attached to the inner wall of the inner filter cartridge, a connecting rod is arranged between the inner filter cartridge and the outer shell, a guide groove is opened between the collecting tank and the outer shell, the output end of the driving unit is fixedly connected to the spiral conveying shaft passing through the inner filter cartridge, and the reflux pipe is arranged between the outer shell and the water storage container.

[0010] Preferably, the inner cavity of the collecting trough is an inclined flow-guiding structure, and the flow-guiding trough is opened at the lowest point of the inclined flow-guiding structure.

[0011] Preferably, the spiral blades on the spiral conveying shaft change from sparse to dense along the sediment conveying direction.

[0012] Preferably, the diameter of the spiral conveying shaft increases from small to large along the sediment conveying direction.

[0013] Preferably, the lower portion of the outer shell is a funnel-shaped structure, and the reflux pipe is arranged at the lowest point of the funnel-shaped structure.

[0014] Preferably, the driving part includes a water wheel housing, a rotating shaft and water wheel blades, the water wheel housing is arranged on the diversion pipe, the water wheel housing is internally rotatably connected to a rotating shaft having one end fixedly connected to the screw conveying shaft, and the rotating shaft is provided with water wheel blades.

[0015] Preferably, a mounting plate for installing the driving part is provided on one side of the bottom wall of the collecting trough, a first guide rod is provided between the outer shell and the mounting plate, a pressure head movably connected to the rotating shaft seal is slidably connected to the first guide rod, and an elastic member is provided between the pressure head and the mounting frame.

[0016] Preferably, the photovoltaic power generation component also includes a frame, one side of the frame is rotatably connected to a ball screw, the ball screw is transmission-connected to a ball nut, the other side of the frame is fixedly provided with a second guide rod, the second guide rod is slidably connected to a guide sleeve, a cleaning brush is provided between the ball nut and the guide sleeve, and the frame is provided with a motor whose output end is fixedly connected to the ball screw, and the motor is electrically connected to the power storage unit.

[0017] Compared with the prior art, the present invention uses the coordinated arrangement of photovoltaic brackets, photovoltaic panels, control units, power storage units, flushing pipes, shunt pipes, collecting tanks, drip irrigation pipes, water storage containers, reflux devices, water pumps, main pipes, electric control valves, heat exchange pipes, air intake hoods and negative pressure fans. Part of the electric energy generated by the photovoltaic power generation components is stored in the power storage unit to power the water pumps, electric control valves and negative pressure fans. The negative pressure fans rotate to draw the air above the ground surface into the heat exchange pipes, and use the temperature difference between the air above the ground surface and the underground heat exchange pipes to condense the moisture in the air into small water droplets for storage. In the water storage container, the temperature difference between day and night in the desert area is large, which is more conducive to the condensation of air into water. The collected water is transported to the main pipe by a water pump, and then irrigates the sand-proof plants through drip irrigation pipes from the main pipe, or is transported to the flushing pipe through a shunt pipe from the main pipe, and sprayed from the flushing pipe to the surface of the photovoltaic panel to wash away the sand and dust on the photovoltaic panel. The flushing water is collected in the collection tank and then processed by the reflux device and then returned to the water storage container, thereby realizing the irrigation of sand-proof plants with water in a natural state. The water resource utilization rate is high, which is conducive to solving the problem of water shortage in desertified areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of the air intake hood of the present invention;

[0020] Figure 3 It is a schematic cross-sectional structure diagram of the driving part of the present invention;

[0021] Figure 4 For the present invention Figure 1 A-axis cross-sectional structural diagram;

[0022] Figure 5 For the present invention Figure 4 A magnified schematic diagram of the structure at B in the middle;

[0023] Figure 6It is a schematic diagram of the structure of the cleaning brush of the present invention.

[0024] In the figure: 1. photovoltaic bracket; 2. photovoltaic panel; 3. water storage container; 4. flushing pipe; 5. drip irrigation pipe; 6. water pump; 7. main pipe; 8. electric control valve; 9. collecting tank; 10. outer shell; 11. heat exchange tube; 12. fan; 13. umbrella-shaped shell; 14. air inlet; 15. inner filter cartridge; 16. spiral conveyor shaft; 17. return pipe; 18. connecting rod; 19. guide groove; 20. second guide rod; 21. filter cloth; 22. first guide rod; 23. pressure head; 24. elastic member; 25. water wheel shell; 26. rotating shaft; 27. water wheel blade; 28. frame; 29. ​​ball screw; 30. motor; 31. ball nut; 32. guide sleeve; 33. cleaning brush; 34. shunt pipe. DETAILED DESCRIPTION

[0025] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] like Figure 1 to Figure 6 As shown, an ecological restoration device for desertified areas based on a photovoltaic power station includes a photovoltaic power generation component, wherein the photovoltaic power generation component includes a photovoltaic bracket 1, a photovoltaic panel 2, a control unit and a power storage unit, and the sunshade area below the photovoltaic panel 2 is used to plant sand-proof plants, characterized in that: a flushing pipe 4 for flushing the surface of the photovoltaic panel 2 is provided at the top of the photovoltaic panel 2, the flushing pipe 4 is connected to a shunt pipe 34, a collecting tank 9 is provided at the lower end of the photovoltaic panel 2, and a drip irrigation pipe 5 for irrigating the sand-proof plants is arranged on the ground;

[0027] It also includes a water storage container 3 arranged at least two meters below the ground, a reflux device is arranged between the collecting tank 9 and the water storage container 3, the water storage container 3 is connected to a water pump 6 electrically connected to the power storage unit, the water pump 6 is connected to a main pipe 7 connected to the shunt pipe 34 and the drip irrigation pipe 5, and the shunt pipe 34 and the drip irrigation pipe 5 are respectively provided with an electric control valve 8 electrically connected to the power storage unit;

[0028] The water storage container 3 is provided with a heat exchange tube 11 extending out of the ground, an air intake hood is provided at the upper end of the heat exchange tube 11, and a negative pressure fan 12 electrically connected to the power storage unit is provided inside the air intake hood.

[0029] When in use, part of the electric energy generated by the photovoltaic power generation assembly is stored in the power storage unit to power the water pump 6, the electric control valve 8 and the negative pressure fan 12. The negative pressure fan 12 rotates to draw the air above the surface into the heat exchange tube 11. The temperature difference between the air above the surface and the underground heat exchange tube 11 is used to condense the moisture in the air into small water droplets, which are stored in the water storage container 3. The temperature difference between day and night in the desert area is large, which is more conducive to the condensation of air into water. When it is necessary to irrigate the sand-proof plants, the electric control valve 8 on the drip irrigation pipe 5 is opened, and the collected water is transported by the water pump 6. To the main pipe 7, and then the main pipe 7 is used to irrigate the sand-proof plants through the drip irrigation pipe 5. When the photovoltaic panel 2 needs to be flushed, the electric control valve 8 on the shunt pipe 34 is opened, and the collected water is transported to the main pipe 7 by the water pump 6, and then transported to the flushing pipe 4 by the main pipe 7 through the shunt pipe 34, and sprayed from the flushing pipe 4 to the surface of the photovoltaic panel 2 to flush the sand and dust on the photovoltaic panel 2. The flushing water is collected in the collecting tank 9 and then processed by the reflux device and then returned to the water storage container 3 for secondary recycling, thereby realizing the irrigation of sand-proof plants with water in its natural state.

[0030] In order to improve the efficiency of air condensing into water, preferably, the air intake hood includes an umbrella-shaped shell 13, on which air intake holes 14 are arranged. The umbrella-shaped shell 13 can increase the contact area with the air, increase the air intake volume, improve the efficiency of air condensing into water, and provide sufficient irrigation water and flushing water.

[0031] In order to achieve the purpose of improving the utilization rate of water resources, preferably, the reflux device includes an outer shell 10, an inner filter cartridge 15, a spiral conveying shaft 16, a reflux pipe 17, a filter cloth 21 and a driving unit. The outer shell 10 is arranged below the collecting tank 9, and the filter cloth 21 is attached to the inner wall of the inner filter cartridge 15. A connecting rod 18 is arranged between the inner filter cartridge 15 and the outer shell 10. A guide groove 19 is opened between the collecting tank 9 and the outer shell 10. The output end of the driving unit is fixedly connected with the spiral conveying shaft 16 that passes through the inner filter cartridge 15. The reflux pipe 17 is arranged between the outer shell 10 and the water storage container 3. The driving unit includes a water wheel shell 25, a rotating shaft 26 and water wheel blades 27. The water wheel shell 25 is arranged on the diversion pipe 34. The interior of the water wheel shell 25 is rotatably connected to a rotating shaft 26 with one end fixedly connected to the spiral conveying shaft 16, and water wheel blades 27 are arranged on the rotating shaft 26.

[0032] When washing the sand and dust on the photovoltaic panel 2, the water flowing through the diversion pipe 34 first passes through the water wheel shell 25 to impact the water wheel blades 27, driving the rotating shaft 26 to rotate, and the rotating shaft 26 drives the screw conveying shaft 16 to rotate. The flushing water gathered in the collection tank 9 enters the inner filter cartridge 15 through the guide groove 19, and the rotating screw conveying shaft 16 transports the flushing water to the other end. During the transportation process, the water in the flushing water passes through the inner filter cartridge 15 and the filter cloth 21 into the outer shell 10, and flows back to the water storage container 3 through the return pipe 17 for secondary utilization, while the silt is discharged from the end of the outer shell 10 under the transportation action of the screw conveying shaft 16, so as to realize the separation of silt and water in the flushing water, which is beneficial to improve the utilization rate of water resources.

[0033] In order to achieve the purpose of improving the utilization rate of water resources, preferably, the inner cavity of the collecting tank 9 is an inclined guide structure, and the guide tank 19 is opened at the lowest point of the inclined guide structure, which is conducive to allowing the flushing water carrying sediment to flow completely into the inner filter cartridge 15, so that the sediment in the flushing water is completely separated, which is conducive to improving the utilization rate of water resources.

[0034] In order to achieve the purpose of improving the utilization rate of water resources, preferably, the spiral blades on the spiral conveying shaft 16 change from sparse to dense along the direction of sediment conveying. The sediment is gradually squeezed during the conveying process, and more water is separated from the sediment through the inner filter cartridge 15 and the filter cloth 21 and enters the outer shell 10, and finally flows back to the water storage container 3 through the reflux pipe 17, and the sediment is discharged from the end of the outer shell 10, thereby improving the separation effect of sediment and water and improving the utilization rate of water resources.

[0035] In order to achieve the purpose of improving the utilization rate of water resources, preferably, the diameter of the spiral conveying shaft 16 increases from small to large along the direction of sediment conveying, and the gap between two adjacent spiral blades along the conveying direction gradually decreases, so that the sediment is gradually squeezed during the conveying process, and more water is separated from the sediment through the inner filter cartridge 15 and the filter cloth 21 and enters the outer shell 10, and finally flows back to the water storage container 3 through the reflux pipe 17, and the sediment is discharged from the end of the outer shell 10, thereby improving the separation effect of sediment and water and improving the utilization rate of water resources.

[0036] In order to achieve the purpose of improving the utilization rate of water resources, preferably, the lower part of the outer shell 10 is a funnel-shaped structure, and the return pipe 17 is arranged at the lowest point of the funnel-shaped structure.

[0037] In order to achieve the purpose of improving the utilization rate of water resources, preferably, a mounting plate for installing the drive unit is provided on one side of the bottom wall of the collecting tank 9, and a first guide rod 22 is provided between the outer shell 10 and the mounting plate. A pressure head 23 that is sealingly and movably connected to the rotating shaft 26 is slidably connected to the first guide rod 22, and an elastic member 24 is provided between the pressure head 23 and the mounting frame. The pressure head 23 seals the inner filter cartridge 15 under the elastic force of the elastic member 24. Only when the mud and sand in the inner filter cartridge 15 are dry enough to form a mud cake can the pressure head 23 be pushed open and discharged, so that the separation of mud and water is more thorough, the separation effect of mud and water is improved, and the utilization rate of water resources is improved.

[0038] In order to achieve the purpose of improving the utilization rate of water resources, preferably, the photovoltaic power generation component also includes a frame 28, one side of the frame 28 is rotatably connected to a ball screw 29, and the ball screw 29 is transmission-connected to a ball nut 31, and the other side of the frame 28 is fixedly provided with a second guide rod 20, and the second guide rod 20 is slidably connected to a guide sleeve 32, a cleaning brush 33 is arranged between the ball nut 31 and the guide sleeve 32, and a motor 30 with an output end fixedly connected to the ball screw 29 is arranged on the frame 28, and the motor 30 is electrically connected to the power storage unit.

[0039] When washing the dust on the photovoltaic panel 2, the motor 30 can be selectively started synchronously. The motor 30 drives the ball screw 29 to rotate back and forth. Under the guiding action of the second guide rod 20 on the guide sleeve 32, the ball nut 31 drives the cleaning brush 33 to move back and forth along the surface of the photovoltaic panel 2, thereby improving the cleaning effect of the photovoltaic panel 2 and promptly scraping off the washing water on the surface of the photovoltaic panel 2, reducing water evaporation and improving the water recovery rate.

[0040] Compared with the prior art, the present invention is provided with a photovoltaic bracket 1, a photovoltaic panel 2, a control unit, a power storage unit, a flushing pipe 4, a shunt pipe 34, a collecting tank 9, a drip irrigation pipe 5, a water storage container 3, a reflux device, a water pump 6, a main pipe 7, an electric control valve 8, a heat exchange pipe 11, an air intake hood and a negative pressure fan 12. Part of the electric energy generated by the photovoltaic power generation assembly is stored in the power storage unit to supply power to the water pump 6, the electric control valve 8 and the negative pressure fan 12. The negative pressure fan 12 rotates to draw the air above the ground surface into the heat exchange pipe 11, and utilizes the temperature difference between the air above the ground surface and the underground heat exchange pipe 11 to condense the moisture in the air into Small water droplets are stored in the water storage container 3. The temperature difference between day and night in the desert area is large, which is more conducive to the condensation of air into water. The collected water is transported to the main pipe 7 by the water pump 6, and then irrigated to the sand-proof plants by the main pipe 7 through the drip irrigation pipe 5, or transported to the flushing pipe 4 by the main pipe 7 through the shunt pipe 34, and sprayed from the flushing pipe 4 to the surface of the photovoltaic panel 2 to wash away the sand and dust on the photovoltaic panel 2. The flushing water is collected in the collection tank 9 and then processed by the reflux device and then returned to the water storage container 3, so that the water in the natural state is used to irrigate the sand-proof plants, and the water resource utilization rate is high, which is conducive to solving the problem of water shortage in desertified areas.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An ecological restoration device for desertified areas based on a photovoltaic power station, comprising a photovoltaic power generation component, wherein the photovoltaic power generation component comprises a photovoltaic bracket (1), a photovoltaic panel (2), a control unit and a power storage unit, wherein the sunshade area below the photovoltaic panel (2) is used for planting sand-proof plants, and is characterized in that: A flushing pipe (4) for flushing the surface of the photovoltaic panel (2) is arranged at the top of the photovoltaic panel (2), the flushing pipe (4) is connected to a shunt pipe (34), a collecting tank (9) is arranged at the lower end of the photovoltaic panel (2), and a drip irrigation pipe (5) for irrigating sand-proof plants is arranged on the ground; It also includes a water storage container (3) arranged below the ground, a reflux device being arranged between the collecting tank (9) and the water storage container (3), the water storage container (3) being connected to a water pump (6) electrically connected to the power storage unit, the water pump (6) being connected to a main pipe (7) communicating with a shunt pipe (34) and a drip irrigation pipe (5), and the shunt pipe (34) and the drip irrigation pipe (5) being respectively provided with an electric control valve (8) electrically connected to the power storage unit; The water storage container (3) is provided with a heat exchange tube (11) extending out of the ground, an air intake hood is provided at the upper end of the heat exchange tube (11), and a negative pressure fan (12) electrically connected to the power storage unit is provided inside the air intake hood.

2. The desertification area ecological restoration equipment based on photovoltaic power station according to claim 1 is characterized by: The air intake cover comprises an umbrella-shaped outer shell (13), and the umbrella-shaped outer shell (13) is provided with air intake holes (14).

3. The desertification area ecological restoration equipment based on photovoltaic power station according to claim 1 or 2, characterized in that: The reflux device comprises an outer shell (10), an inner filter cartridge (15), a spiral conveying shaft (16), a reflux pipe (17), a filter cloth (21) and a driving unit. The outer shell (10) is arranged below a collecting tank (9). The filter cloth (21) is attached to the inner wall of the inner filter cartridge (15). A connecting rod (18) is arranged between the inner filter cartridge (15) and the outer shell (10). A guide groove (19) is provided between the collecting tank (9) and the outer shell (10). The output end of the driving unit is fixedly connected to a spiral conveying shaft (16) penetrating the inner filter cartridge (15). The reflux pipe (17) is arranged between the outer shell (10) and the water storage container (3).

4. The desertification area ecological restoration equipment based on photovoltaic power station according to claim 3 is characterized by: The inner cavity of the collecting trough (9) is an inclined flow-guiding structure, and the flow-guiding trough (19) is opened at the lowest point of the inclined flow-guiding structure.

5. The desertification area ecological restoration equipment based on photovoltaic power station according to claim 3 is characterized by: The spiral blades on the spiral conveying shaft (16) change from sparse to dense along the sediment conveying direction.

6. The desertification area ecological restoration equipment based on photovoltaic power station according to claim 3 is characterized by: The diameter of the spiral conveying shaft (16) increases from small to large along the sediment conveying direction.

7. The desertification area ecological restoration equipment based on photovoltaic power station according to claim 3 is characterized by: The lower part of the outer shell (10) is a funnel-shaped structure, and the return pipe (17) is arranged at the lowest point of the funnel-shaped structure.

8. The desertification area ecological restoration equipment based on photovoltaic power station according to claim 3 is characterized by: The driving part comprises a water wheel housing (25), a rotating shaft (26) and water wheel blades (27); the water wheel housing (25) is arranged on a diversion pipe (34); the interior of the water wheel housing (25) is rotatably connected to a rotating shaft (26) having one end fixedly connected to a screw conveying shaft (16); and the rotating shaft (26) is provided with water wheel blades (27).

9. The desertification area ecological restoration equipment based on photovoltaic power station according to claim 8 is characterized by: A mounting plate for mounting a driving unit is provided on one side of the bottom wall of the collecting tank (9), a first guide rod (22) is provided between the outer shell (10) and the mounting plate, a pressure head (23) which is sealingly and movably connected to a rotating shaft (26) is slidably connected to the first guide rod (22), and an elastic member (24) is provided between the pressure head (23) and the mounting frame.

10. The desertification area ecological restoration equipment based on photovoltaic power station according to claim 1 is characterized by: The photovoltaic power generation assembly also includes a frame (28), one side of the frame (28) is rotatably connected to a ball screw (29), the ball screw (29) is transmission-connected to a ball nut (31), the other side of the frame (28) is fixedly provided with a second guide rod (20), the second guide rod (20) is slidably connected to a guide sleeve (32), a cleaning brush (33) is provided between the ball nut (31) and the guide sleeve (32), and the frame (28) is provided with a motor (30) whose output end is fixedly connected to the ball screw (29), and the motor (30) is electrically connected to the power storage unit.

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