Photovoltaic power station spraying weeding system

Abstract

This application relates to the field of photovoltaic power plant operation and maintenance equipment technology, and discloses a photovoltaic power plant spray weeding system, which includes a photovoltaic support, photovoltaic modules, a media supply unit, a spray cleaning unit, and a weed monitoring unit. The photovoltaic modules are inclinedly mounted on the photovoltaic support, and the spray cleaning unit is located on one side of the photovoltaic modules. Several spray cleaning units are distributed along the length of the photovoltaic support. Each spray cleaning unit includes a support pipe, a first driving component, a spray pipe, and a second driving component. One end of the support pipe is hinged to the lower edge of the photovoltaic support. The first driving component is drively connected to the support pipe. The spray pipe is perpendicular to the support pipe and the two are connected. The spray pipe is connected to the free end of the support pipe away from the hinge point. The second driving component is drively connected to the spray pipe. The media supply unit is connected to the support pipe. The weed monitoring unit is electrically connected to the media supply unit and the spray cleaning unit. This application has the effect of improving the overall operation and maintenance efficiency of photovoltaic power plants.

Description

Technical Field

[0001] This application relates to the field of photovoltaic power plant operation and maintenance equipment technology, and in particular to a photovoltaic power plant spray weeding system. Background Technology

[0002] Solar photovoltaic (PV) power generation, as a clean and renewable energy source, has been widely adopted globally. PV power plants are mostly located on open ground, where abundant sunlight and suitable soil moisture make them highly susceptible to weed growth. If weeds grow taller than the lower edge of the PV modules, they directly block the light-receiving surface, reducing the amount of solar radiation received by the modules and thus affecting the overall power generation efficiency. Long-term localized shading can also cause hot spot effects on the PV modules, accelerating module aging, shortening module lifespan, and increasing power plant operation and maintenance costs. Furthermore, dry weeds are flammable and can easily cause fires during hot, dry seasons, posing a significant threat to the safe operation of PV power plants and potentially causing mass damage to modules and substantial economic losses. Therefore, timely and comprehensive weeding is crucial for the stable and efficient operation of PV power plants, and the ability to perform large-scale, full-coverage weeding is a core requirement for the operation and maintenance of large-scale PV power plants.

[0003] Currently, weeding operations in photovoltaic power plants mainly rely on traditional methods, which have many drawbacks: manual weeding is labor-intensive, inefficient, requires a large investment of manpower, and has a long weeding cycle, making it difficult to suppress the rapid growth of weeds and adapt to the operation and maintenance needs of large-scale photovoltaic power plants; mechanical weeding requires specialized weeding equipment, which has high purchase and maintenance costs, and the dense photovoltaic supports and narrow passages in photovoltaic power plants make it easy for mechanical operations to collide with photovoltaic modules and supports, causing equipment damage, and it is also poorly adapted to complex terrains such as mountains and hills; chemical weeding achieves weed control by spraying herbicides, which can be effective in the short term, but herbicides can easily penetrate the soil and pollute surrounding water sources, which does not conform to the development trend of ecological and environmentally friendly operation and maintenance of photovoltaic power plants, and long-term use can cause weeds to develop resistance, leading to a gradual decline in weeding effectiveness, and may also cause corrosion to the surface of photovoltaic modules.

[0004] Chinese Patent CN110402910A discloses an automatic weeding device for a photovoltaic power station. The device includes a steam generator connected to a heating unit for heating water within the generator into steam. The steam generator's inlet is connected to a water supply pipe, and its outlet is connected to a steam spraying unit positioned above the weeds. The device also includes a height detection unit for detecting weed height and a control unit connected to the height detection unit. The steam spraying unit has a switch for controlling its opening and closing, and the control unit is connected to the switch. When the height detection unit detects that the weed height exceeds a preset height, it sends a weeding signal to the control unit, which then controls the switch to open the steam spraying unit. The high temperature of the steam kills the weeds, achieving automatic weeding.

[0005] Existing weeding methods have many drawbacks. Manual mowing is labor-intensive, inefficient, and unable to effectively suppress weed growth; mechanical mowing is costly, prone to equipment damage, and poorly adaptable to complex terrain; chemical weeding is environmentally unfriendly and can lead to herbicide resistance in weeds. Furthermore, steam weeding devices like those in the aforementioned patents have limited coverage areas, making it difficult to meet the full-area weeding needs of large-scale photovoltaic power plants. This also introduces new photovoltaic module maintenance issues, such as limited coverage, blind spots, inability to operate mobilely across the entire area, and the adhesion of weed fibers to the photovoltaic module surface, affecting power generation efficiency. Summary of the Invention

[0006] In order to improve the overall operation and maintenance efficiency of photovoltaic power plants, this application provides a photovoltaic power plant spray weeding system.

[0007] The photovoltaic power station spray weeding system provided in this application adopts the following technical solution: A photovoltaic power station spray weeding system includes a photovoltaic support frame, photovoltaic modules, a media supply unit, a spray cleaning unit, and a weed monitoring unit. The photovoltaic modules are inclinedly mounted on the photovoltaic support frame. The spray cleaning unit is located on one side of the photovoltaic modules, and several spray cleaning units are distributed along the length of the photovoltaic support frame. Each spray cleaning unit includes a support pipe, a first driving component, a spray pipe, and a second driving component. One end of the support pipe is hinged to the lower edge of the photovoltaic support frame. The first driving component is driven by the support pipe and drives the support pipe to rotate around the hinge point. The spray pipe is perpendicular to the support pipe and the two are connected. The spray pipe is connected to the free end of the support pipe away from the hinge point. The second driving component is driven by the spray pipe and drives the spray pipe to rotate around its own axis. The media supply unit is connected to the support pipe. The weed monitoring unit is electrically connected to the media supply unit and the spray cleaning unit, and is used to detect the height of weeds and trigger the spraying operation.

[0008] By adopting the above technical solution, a weed monitoring unit detects the height of weeds. When the weed height reaches the trigger value, the weed monitoring unit triggers a spraying operation. The first driving component drives the support pipe to rotate around the hinge point, adjusting the height and angle of the spray pipe and moving it above the weed area. The media supply unit delivers weeding media to the support pipe. At the same time, the second driving component causes the spray pipe to rotate around its own axis, flexibly changing the spraying direction, expanding the weeding coverage area, reducing blind spots, and meeting the weeding needs of large-scale photovoltaic power plants. After the weeding operation, the first driving component again drives the support pipe to rotate around the hinge point, adjusting the height and angle of the spray pipe and moving it above the photovoltaic modules. The media supply unit delivers cleaning media to the support pipe. The second driving component causes the spray pipe to rotate around its own axis, flexibly changing the spraying direction, expanding the cleaning media spray coverage area, reducing blind spots, and even if grass fibers are blown and adhere to the surface of the photovoltaic module panel during weeding, the probability of new module shading problems can be reduced through cleaning operations. The combined weeding and cleaning operations improve the light transmittance and power generation efficiency of photovoltaic modules, reduce the cleaning and maintenance costs of photovoltaic modules, and can flexibly adjust the spraying position and direction according to the power station terrain and support distribution, thus improving adaptability to complex terrain.

[0009] Optionally, the first driving component includes a worm gear, a worm, and a brake motor. The worm gear is sleeved and fixedly connected to the hinge shaft of the support tube. The worm meshes with the worm gear. The brake motor is mounted on the photovoltaic bracket, and the output shaft of the brake motor is coaxially and fixedly connected to the worm.

[0010] By adopting the above technical solution, when it is necessary to adjust the height and angle of the spray pipe, the brake motor starts and drives the worm gear fixed coaxially with its output shaft to rotate. Because the worm gear meshes with the worm wheel that is sleeved on the hinge shaft of the support pipe and fixedly connected, the rotation of the worm gear causes the worm wheel to drive the support pipe to rotate around the hinge point, which precisely controls the rotation angle of the support pipe. This allows the support pipe to flexibly adjust its position according to the actual weeding needs, so that the spray pipe connected to the support pipe can reach a better spraying position, effectively expanding the weed spraying coverage area and improving weeding efficiency.

[0011] Optionally, the second driving component includes a rotary motor, a driving gear, and a driven gear ring. The driven gear ring is sleeved and fixed to the outside of the connection end between the spray pipe and the support pipe. The rotary motor is fixed to the free end of the support pipe. The driving gear is sleeved and fixed to the output shaft of the rotary motor, and the driving gear meshes with the driven gear ring.

[0012] By adopting the above technical solution, when it is necessary to change the spraying direction, the rotary motor starts, and its output shaft drives the drive gear to rotate. The drive gear meshes with the driven gear ring, driving the driven gear ring to rotate. Since the driven gear ring is sleeved and fixed to the outside of the connection end between the spray pipe and the support pipe, the rotation of the driven gear ring causes the spray pipe to rotate around its own axis, allowing the spray pipe to flexibly adjust the spraying angle, expanding the spraying range. Combined with the angle adjustment of the support pipe, it can cover more weeds, improve weeding efficiency, reduce blind spots in weeding, and prevent local weeds from blocking the photovoltaic modules and affecting power generation efficiency.

[0013] Optionally, a silicone rubber sealing gasket is provided at the rotatable connection between the spray pipe and the support pipe. The silicone rubber sealing gasket is sleeved on the outside of the free end of the support pipe and abuts against the inner wall of the connection end of the spray pipe.

[0014] By adopting the above technical solution, the silicone rubber sealing gasket can prevent media leakage at the rotating connection between the spray pipe and the support pipe, improve the system's sealing performance, ensure the stability of media transmission, and extend the service life of the connection.

[0015] Optionally, the medium supply unit is located at the back panel of the photovoltaic module and includes a water storage tank, a steam generator, a spray water supply pipe, and a cleaning water supply pipe. The input end of the spray water supply pipe is connected to the water storage tank, and the output end is connected to the support pipe after passing through the steam generator. The two ends of the cleaning water supply pipe are respectively connected to the water storage tank and the support pipe.

[0016] By adopting the above technical solution, when spray weeding is required, water in the storage tank flows into the steam generator through the spray supply pipe. After being heated by the steam generator to form high-temperature steam, it is then transported to the spray pipe through the support pipe, using the high-temperature steam to remove weeds. When cleaning the photovoltaic modules is required, water in the storage tank flows directly into the support pipe through the cleaning supply pipe, and then cleans the photovoltaic modules through the spray pipe. This setup enables a single system to perform both spray weeding and photovoltaic module cleaning, improving the overall utilization rate of the system and reducing equipment costs. Furthermore, placing the media supply unit at the back panel of the photovoltaic modules makes efficient use of space, resulting in a more compact system layout.

[0017] Optionally, the steam generator is a solar steam generator, including a heat collection tube, a trough-type heat collection plate, a heat-conducting fluid circulation pipe, and a steam generating box. The heat collection tube is transparent and is installed on the top of the photovoltaic support along the length of the photovoltaic support. The trough-type heat collection plate is inserted into the heat collection tube, with its concave surface facing the photovoltaic module. The steam generating box has a heat exchange chamber, and the heat-conducting fluid circulation pipe is coiled in the heat exchange chamber. Both the heat collection tube and the heat-conducting fluid circulation pipe are filled with heat-conducting oil, and both ends of the heat-conducting fluid circulation pipe are connected to the heat collection tube.

[0018] By adopting the above technical solution, the steam generator can utilize the electricity collected and converted by photovoltaic modules for heating. Simultaneously, transparent heat collection tubes are installed at the top along the length of the photovoltaic support. Sunlight irradiates the concave surface of the trough-type heat collection panel, focusing solar radiation energy onto the heat transfer oil in the transparent heat collection tubes, thus heating the oil. The heated heat transfer oil circulates through the heat transfer fluid circulation pipe, transferring heat to the water pumped from the storage tank inside the steam generator. Together, these two processes heat the water in the heat exchange chamber to generate a hot liquid or steam flow of 95-100°C, saving energy supplied by the photovoltaic modules. This setup utilizes solar energy as an auxiliary energy source, reducing the energy consumption and costs associated with traditional steam generators that rely on electricity or other energy sources, thus reducing energy consumption and operating costs. Solar energy is a clean energy source; using a solar steam generator reduces environmental pollution and meets environmental protection requirements. Furthermore, the heat collection tubes, installed along the length of the photovoltaic support, fully utilize the space of the photovoltaic power station, improving space utilization.

[0019] Optionally, the spray pipe is provided with a number of spray heads and a number of micro booster pumps distributed along its length. Each spray head corresponds to a micro booster pump. The micro booster pump is embedded in the cavity of the spray pipe, with the water inlet of the micro booster pump facing the support pipe and the water outlet facing the spray head.

[0020] By adopting the above technical solution, during spraying operations, the medium enters the spray pipe from the support pipe. A miniature booster pump is embedded within the spray pipe cavity, with its inlet facing the support pipe. This pump draws in the medium entering the spray pipe and then pressurizes it from the outlet facing the spray head before delivering it to the spray head. Because the miniature booster pump corresponds one-to-one with each spray head and is distributed along the length of the spray pipe, it can individually pressurize the spray medium for each spray head. This results in a more stable and uniform pressure of the medium sprayed from the spray head, improving the spraying effect and coverage, and enhancing weed control and cleaning capabilities.

[0021] Optionally, the spray head is a detachable structure, and the spray head and the spray pipe are connected by external and internal threads.

[0022] By adopting the above technical solution, the detachable structure of the spray head facilitates the replacement, maintenance and cleaning of the spray head. The external and internal threads make the connection between the spray head and the spray pipe secure, and the waterproof sealing ring wrapped around the connection can prevent water leakage at the connection and ensure the normal operation of the system.

[0023] Optionally, the weed monitoring unit includes several infrared ranging sensors and a central controller. The infrared ranging sensors are fixed at intervals along the length of the photovoltaic support at the lower edge of the photovoltaic module. The detection end of the infrared ranging sensor faces the ground. The central controller is electrically connected to the infrared ranging sensors, the first driving element, and the second driving element, respectively.

[0024] By adopting the above technical solution, the height of weeds can be detected in real time. When the detected weed height reaches a preset value, the infrared ranging sensor transmits a signal to the central controller, which then controls the operation of the first and second driving components. The first driving component causes the support pipe to rotate around the hinge point, and the second driving component causes the spray pipe to rotate around its own axis. This allows for precise triggering of the spraying operation when the weeds reach a certain height, enabling targeted treatment of the weeds and reducing the possibility of excessively tall weeds obstructing the photovoltaic modules and affecting power generation efficiency.

[0025] Optionally, the outside of the water storage tank is covered with a heat insulation layer, and the water storage tank is also connected to a water supply pipe and a liquid level sensor. A water supply solenoid valve is installed on the water supply pipe, and the liquid level sensor is electrically connected to the water supply solenoid valve.

[0026] By adopting the above technical solution, the thermal insulation layer covering the outside of the water storage tank can reduce heat loss of the water inside the tank, maintain stable water temperature, and reduce energy consumption; the liquid level sensor monitors the water level in the tank in real time. When the water level is lower than the set value, the liquid level sensor sends a signal to open the water replenishment solenoid valve, and water is replenished to the tank through the water replenishment pipe to ensure sufficient water supply and realize automatic water replenishment; when the water level is higher than the set value, water replenishment stops, effectively improving the stability and reliability of the system.

[0027] In summary, this application includes at least one of the following beneficial technical effects: 1. A weed monitoring unit detects weed height. When the weed height reaches a trigger value, the monitoring unit initiates a spraying operation. The first drive unit rotates the support pipe around the hinge point, adjusting the height and angle of the spray pipe and moving it above the weed area. The media supply unit delivers weeding media to the support pipe. Simultaneously, the second drive unit rotates the spray pipe around its own axis, flexibly changing the spraying direction, expanding the weeding coverage, reducing blind spots, and meeting the weeding needs of large-scale photovoltaic power plants. After weeding, the first drive unit again rotates the support pipe around the hinge point, adjusting the height and angle of the spray pipe to move it above the photovoltaic modules. The media supply unit delivers cleaning media to the support pipe. The second drive unit rotates the spray pipe around its own axis, flexibly changing the spraying direction, expanding the cleaning media spray coverage, reducing blind spots on the photovoltaic modules, and even if weeds are blown and adhere to the photovoltaic module panel surface during weeding, the cleaning operation can reduce the probability of new module shading problems. The combined weeding and cleaning operations improve the light transmittance and power generation efficiency of photovoltaic modules, reduce the cleaning and maintenance costs of photovoltaic modules, and can flexibly adjust the spraying position and direction according to the power station terrain and support distribution, thus improving adaptability to complex terrain. 2. When the height and angle of the spray pipe need to be adjusted, the brake motor starts and drives the worm gear fixed coaxially with its output shaft to rotate. Because the worm gear meshes with the worm wheel which is sleeved on the hinge shaft of the support pipe and fixedly connected, the rotation of the worm gear causes the worm wheel to drive the support pipe to rotate around the hinge point, which precisely controls the rotation angle of the support pipe. This allows the support pipe to be flexibly adjusted according to the actual weeding needs, so that the spray pipe connected to the support pipe can reach a better spraying position, effectively expanding the weed spraying coverage area and improving weeding efficiency. 3. When the spraying direction needs to be changed, the rotary motor starts, and its output shaft drives the drive gear to rotate. The drive gear meshes with the driven gear ring, driving the driven gear ring to rotate. Because the driven gear ring is sleeved and fixed to the outside of the connection end between the spray pipe and the support pipe, the rotation of the driven gear ring drives the spray pipe to rotate around its own axis, allowing the spray pipe to flexibly adjust the spraying angle, expanding the spraying range. Combined with the angle adjustment of the support pipe, it can cover more weeds, improve weeding efficiency, reduce blind spots in weeding, and prevent local weeds from blocking the photovoltaic modules and affecting power generation efficiency. Attached Figure Description

[0028] Figure 1 This is a distribution diagram of the embodiments of this application in actual application.

[0029] Figure 2 This is a schematic diagram of the overall structure of an embodiment of this application in the state of being sprayed for cleaning.

[0030] Figure 3 This is a cross-sectional view showing the internal structure of the water storage tank in the embodiments of this application.

[0031] Figure 4This is a schematic diagram illustrating the connection relationship between the support tube, worm gear, worm, and brake motor in the embodiments of this application.

[0032] Figure 5 This is a schematic diagram illustrating the connection relationship between the support pipe and the spray pipe in the embodiments of this application.

[0033] Figure 6 This is a cross-sectional view illustrating the connection relationship between the spray pipe, the spray head, and the micro booster pump in the embodiments of this application.

[0034] Figure 7 This is a schematic diagram of the overall structure of an embodiment of this application in the weeding working state.

[0035] Figure 8 This is a schematic diagram of the overall structure of the photovoltaic module in the working state of the embodiment of this application.

[0036] Explanation of reference numerals in the attached figures: 1. Photovoltaic support structure; 2. Photovoltaic module; 3. Medium supply unit; 31. Water storage tank; 311. Thermal insulation layer; 312. Water supply pipe; 313. Liquid level sensor; 314. Water supply solenoid valve; 32. Steam generator; 321. Heat collector tube; 322. Trough-type solar collector panel; 323. Heat transfer fluid circulation pipe; 324. Steam generator; 3241. Heat exchange chamber; 33. Spray water supply pipe; 34. Cleaning supply... 4. Water pipe; 41. Spray cleaning unit; 42. Support pipe; 43. First drive component; 44. Worm gear; 45. Worm; 46. Brake motor; 47. Spray pipe; 48. Second drive component; 49. Rotary motor; 40. Drive gear; 41. Driven gear ring; 50. Weed monitoring unit; 51. Infrared ranging sensor; 52. Central controller; 6. Silicone rubber sealing gasket; 7. Spray head; 8. Miniature booster pump. Detailed Implementation

[0037] The following is in conjunction with the appendix Figures 1-8 This application will be described in further detail.

[0038] This application discloses a photovoltaic power station spray weeding system.

[0039] Reference Figure 1 and Figure 2A photovoltaic power station spray weeding system includes a photovoltaic support frame 1, photovoltaic modules 2, a media supply unit 3, a spray cleaning unit 4, and a weed monitoring unit 5. The photovoltaic modules 2 are installed at an angle on the photovoltaic support frame 1 to provide a foundation for power generation. The spray cleaning unit 4 is located on one side of each group of photovoltaic modules 2. In practical applications, a row of photovoltaic support frames 1 has several groups of photovoltaic modules 2 distributed thereon. The spray cleaning unit 4 corresponding to each group of photovoltaic modules 2 is distributed along the length of the photovoltaic support frame 1. The media supply unit 3 is connected to a support pipe 41 to provide the spraying medium. The weed monitoring unit 5 is electrically connected to the media supply unit 3 and the spray cleaning unit 4 to detect the height of weeds and trigger the spraying operation.

[0040] Reference Figure 1 , Figure 2 and Figure 3 The medium supply unit 3 is located on the back panel of the photovoltaic module 2 and includes a water storage tank 31, a steam generator 32, a spray water supply pipe 33, and a cleaning water supply pipe 34. The water storage tank 31 stores water and is covered with a thermal insulation layer 311. A water replenishment pipe 312 and a liquid level sensor 313 are connected to the water storage tank 31. A water replenishment solenoid valve 314 is installed on the water replenishment pipe 312, and the liquid level sensor 313 is electrically connected to the water replenishment solenoid valve 314. Both the spray water supply pipe 33 and the cleaning water supply pipe 34 are high-temperature resistant metal hoses.

[0041] Reference Figure 1 , Figure 2 and Figure 3 In this embodiment, the steam generator 32 is a solar steam generator 32, including a heat collection tube 321, a trough-type solar collector plate 322, a heat-conducting fluid circulation pipe 323, and a steam generating chamber 324. The heat collection tube 321 is made of a transparent, high-temperature resistant material and is fixed to the top of the photovoltaic support 1 along its length. The trough-type solar collector plate 322 is inserted into the heat collection tube 321, with its concave surface facing the photovoltaic module 2. The steam generating chamber 324 has a heat exchange chamber 3241, and water in the heat exchange chamber 3241 is drawn from a water storage tank 31 by a pump. The heat-conducting fluid circulation pipe 323 is coiled in the heat exchange chamber 3241. Both the heat collection tube 321 and the heat-conducting fluid circulation pipe 323 are filled with heat-conducting oil (not shown in the figure). Both ends of the heat-conducting fluid circulation pipe 323 are connected to the heat collection tube 321, and the heat-conducting oil circulates in the heat collection tube 321 and the heat-conducting fluid circulation pipe 323 by a circulation pump.

[0042] Reference Figure 1 , Figure 2 and Figure 4The spray cleaning unit 4 includes a support pipe 41, a first driving component 42, a spray pipe 43, and a second driving component 44. Both the support pipe 41 and the spray pipe 43 are high-temperature resistant rigid metal pipes. The bottom end of the support pipe 41 is hinged to the lower edge of the photovoltaic bracket 1. The first driving component 42 includes a worm gear 421, a worm 422, and a brake motor 423. The worm gear 421 is sleeved on and fixed to the hinge shaft of the support pipe 41. The worm 422 meshes with the worm gear 421. The brake motor 423 is a commercially available waterproof and aging-resistant motor, which is fixedly mounted on the photovoltaic bracket 1, and its output shaft is coaxially and fixedly connected to the worm 422.

[0043] Reference Figure 2 The inlet of the spray water supply pipe 33 is connected to the storage water tank 31, and the outlet is connected to the support pipe 41 after passing through the steam generator 32. During weeding, the water in the storage water tank 31 enters the steam generator 32 through the spray water supply pipe 33, is heated into steam, and then transported to the spray pipe 43 through the support pipe 41 for spraying. The two ends of the cleaning water supply pipe 34 are connected to the storage water tank 31 and the support pipe 41, respectively. When it is necessary to clean the photovoltaic module 2, the water in the storage water tank 31 is directly transported to the support pipe 41 through the cleaning water supply pipe 34, and then sprayed out by the spray pipe 43 for cleaning.

[0044] Reference Figure 2 and Figure 4 When the brake motor 423 starts, the output shaft drives the worm gear 422 to rotate, which in turn drives the worm wheel 421 to rotate, thereby causing the support tube 41 to rotate around the hinge point. The brake motor 423 has a brake function, which can lock the position of the support tube 41 when it stops rotating, preventing it from shaking randomly.

[0045] Reference Figure 2 , Figure 5 and Figure 6 The spray pipe 43 is perpendicularly arranged to the support pipe 41 and the two are connected. The spray pipe 43 is rotatably connected to the free end of the support pipe 41 away from the hinge point. A silicone rubber sealing gasket 6 is provided at the rotatable connection between the spray pipe 43 and the support pipe 41. The silicone rubber sealing gasket 6 is sleeved on the outside of the free end of the support pipe 41 and abuts against the inner wall of the connecting end of the spray pipe 43. The second driving component 44 includes a rotary motor 441, a driving gear 442, and a driven gear ring 443. The driven gear ring 443 is sleeved and fixed to the outside of the connecting end of the spray pipe 43 and the support pipe 41. The rotary motor 441 is also a commercially available waterproof and aging-resistant motor. The rotary motor 441 is fixed to the free end of the support pipe 41. The driving gear 442 is sleeved and fixed to the output shaft of the rotary motor 441, and the driving gear 442 meshes with the driven gear ring 443.

[0046] Reference Figure 2 , Figure 5 and Figure 6 When the rotary motor 441 starts, its output shaft drives the drive gear 442 to rotate, and the drive gear 442 then drives the driven gear ring 443 to rotate, thereby driving the spray pipe 43 to rotate around its own axis.

[0047] Reference Figure 6 The spray pipe 43 has several spray heads 7 and several miniature booster pumps 8 distributed along its length. Each spray head 7 corresponds to one miniature booster pump 8. The miniature booster pump 8 is fixedly embedded in the cavity of the spray pipe 43, with its inlet facing the support pipe 41 and its outlet facing the spray head 7. The miniature booster pump 8 is a commercially available, small-sized electric booster component used to increase the spray pressure of the spray heads 7. The spray heads 7 have a detachable structure, and are screwed onto the spray pipe 43 via external and internal threads. A waterproof sealing ring (not shown in the figure) is wrapped around the screwed connection.

[0048] Reference Figure 2 The weed monitoring unit 5 includes several infrared ranging sensors 51 and a central controller 52. The infrared ranging sensors 51 are fixed at intervals along the length of the photovoltaic support 1 at the lower edge of the photovoltaic module 2, with the detection ends of the infrared ranging sensors 51 facing the ground. The central controller 52 is fixedly placed on the water storage tank 31. The central controller 52 is electrically connected to all electrical devices in the system.

[0049] Reference Figure 2 , Figure 4 , Figure 5 and Figure 7 Infrared ranging sensor 51 monitors the height of weeds in real time. When the height of weeds exceeds the set value, central controller 52 controls medium supply unit 3 to transport water in storage tank 31 to steam generator 32 through spray supply water pipe 33. After being heated into steam, it is transported to spray pipe 43 through support pipe 41. At the same time, control brake motor 423 and rotary motor 441 of spray cleaning unit 4 to adjust the position and angle of spray pipe 43 so that spray head 7 can accurately perform steam spraying operation on weeds and effectively kill weeds by using the high temperature of steam.

[0050] Reference Figure 2 , Figure 4 , Figure 5 and Figure 8 After weeding, the central controller 52 continues to control the media supply unit 3 to deliver water from the clean water storage tank 31 to the support pipe 41 through the cleaning supply water pipe 34, and then deliver it to the spray pipe 43 through the support pipe 41. At the same time, it controls the brake motor 423 and the rotary motor 441 of the spray cleaning unit 4 to adjust the position and angle of the spray pipe 43 so that the spray head 7 can accurately wash the grass and impurities adhering to the surface of the photovoltaic module 2.

[0051] The implementation principle of a photovoltaic power station spray weeding system according to an embodiment of this application is as follows: The photovoltaic power station spray weeding system monitors the height of weeds in real time through the weed monitoring unit 5. When the weed height exceeds the set value, the central controller 52 controls the medium supply unit 3 to transport water from the storage tank 31 to the steam generator 32 through the spray supply water pipe 33. After being heated into steam, the steam is transported to the spray pipe 43 through the support pipe 41. At the same time, the central controller controls the first drive component 42 and the second drive component 44 of the spray cleaning unit 4 to adjust the position and angle of the spray pipe 43, so that the spray head 7 can accurately perform steam spraying on the weeds, effectively killing the weeds with the high temperature of the steam. When it is necessary to clean the photovoltaic module 2, the central controller 52 controls the medium supply unit 3 to directly transport water from the storage tank 31 to the support pipe 41 through the cleaning supply water pipe 34, and then spray it out from the spray pipe 43 for cleaning. The solar steam generator 32 of the medium supply unit 3 uses solar energy to convert water into steam, which is energy-saving and environmentally friendly, and can provide high-temperature steam to effectively kill weeds. The entire system overcomes the shortcomings of existing weeding methods, such as limited coverage, inability to operate across the entire area, and environmental unfriendliness. It greatly improves the overall operation and maintenance efficiency of photovoltaic power plants, reduces operation and maintenance costs, and minimizes environmental impact, which is of great significance to the stable and efficient operation of photovoltaic power plants.

[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A photovoltaic power station spray weeding system, characterized in that, The system includes a photovoltaic support (1), a photovoltaic module (2), a medium supply unit (3), a spray cleaning unit (4), and a weed monitoring unit (5). The photovoltaic module (2) is inclinedly mounted on the photovoltaic support (1), and the spray cleaning unit (4) is located on one side of the photovoltaic module (2). Several spray cleaning units (4) are distributed along the length of the photovoltaic support (1). Each spray cleaning unit (4) includes a support pipe (41), a first driving component (42), a spray pipe (43), and a second driving component (44). One end of the support pipe (41) is hinged to the lower edge of the photovoltaic support (1), and the first driving component (43) is... 42) is connected to the support pipe (41) and drives the support pipe (41) to rotate around the hinge point. The spray pipe (43) is perpendicular to the support pipe (41) and the two are connected. The spray pipe (43) is connected to the free end of the support pipe (41) away from the hinge point. The second driving member (44) is connected to the spray pipe (43) and drives the spray pipe (43) to rotate around its own axis. The medium supply unit (3) is connected to the support pipe (41). The weed monitoring unit (5) is electrically connected to the medium supply unit (3) and the spray cleaning unit (4) and is used to detect the height of weeds and trigger the spraying operation.

2. The photovoltaic power station spray weeding system according to claim 1, characterized in that, The first driving component (42) includes a worm gear (421), a worm (422), and a brake motor (423). The worm gear (421) is sleeved and fixedly connected to the hinge shaft of the support tube (41). The worm (422) meshes with the worm gear (421). The brake motor (423) is mounted on the photovoltaic bracket (1), and the output shaft of the brake motor (423) is coaxially and fixedly connected to the worm (422).

3. The photovoltaic power station spray weeding system according to claim 1, characterized in that, The second driving component (44) includes a rotary motor (441), a driving gear (442), and a driven gear ring (443). The driven gear ring (443) is sleeved and fixed to the outside of the connection end between the spray pipe (43) and the support pipe (41). The rotary motor (441) is fixed to the free end of the support pipe (41). The driving gear (442) is sleeved and fixed to the output shaft of the rotary motor (441), and the driving gear (442) meshes with the driven gear ring (443).

4. The photovoltaic power station spray weeding system according to claim 1, characterized in that, A silicone rubber sealing gasket (6) is provided at the rotatable connection between the spray pipe (43) and the support pipe (41). The silicone rubber sealing gasket (6) is sleeved on the outside of the free end of the support pipe (41) and abuts against the inner wall of the connecting end of the spray pipe (43).

5. A photovoltaic power station spray weeding system according to claim 1, characterized in that, The medium supply unit (3) is located on the back panel of the photovoltaic module (2) and includes a water storage tank (31), a steam generator (32), a spray water supply pipe (33), and a cleaning water supply pipe (34). The input end of the spray water supply pipe (33) is connected to the water storage tank (31), and the output end is connected to the support pipe (41) after passing through the steam generator (32). The two ends of the cleaning water supply pipe (34) are connected to the water storage tank (31) and the support pipe (41) respectively.

6. A photovoltaic power station spray weeding system according to claim 5, characterized in that, The steam generator (32) is a solar steam generator, including a heat collection tube (321), a trough-type heat collection plate (322), a heat-conducting fluid circulation pipe (323), and a steam generating box (324). The heat collection tube (321) is transparent and is set on the top of the photovoltaic support (1) along the length direction of the photovoltaic support (1). The trough-type heat collection plate (322) is inserted into the heat collection tube (321), and its concave surface faces the photovoltaic module (2). The steam generating box (324) has a heat exchange chamber (3241). The heat-conducting fluid circulation pipe (323) is coiled in the heat exchange chamber (3241). Both the heat collection tube (321) and the heat-conducting fluid circulation pipe (323) are filled with heat-conducting oil. Both ends of the heat-conducting fluid circulation pipe (323) are connected to the heat collection tube (321).

7. A photovoltaic power station spray weeding system according to claim 1, characterized in that, The spray pipe (43) has several spray heads (7) and several micro booster pumps (8) distributed along its length. The spray heads (7) and micro booster pumps (8) correspond one-to-one. The micro booster pumps (8) are embedded in the cavity of the spray pipe (43), and the water inlet of the micro booster pumps (8) faces the support pipe (41) and the water outlet faces the spray head (7).

8. A photovoltaic power station spray weeding system according to claim 7, characterized in that, The spray head (7) is a detachable structure, and the spray head (7) and the spray pipe (43) are connected by external and internal threads.

9. A photovoltaic power station spray weeding system according to claim 1, characterized in that, The weed monitoring unit (5) includes several infrared ranging sensors (51) and a central controller (52). Several infrared ranging sensors (51) are fixed at intervals along the length of the photovoltaic support (1) at the lower edge of the photovoltaic module (2). The detection end of the infrared ranging sensor (51) faces the ground. The central controller (52) is electrically connected to the infrared ranging sensor (51), the first driving member (42), and the second driving member (44) respectively.

10. A photovoltaic power station spray weeding system according to claim 5, characterized in that, The storage tank (31) is covered with a heat insulation layer (311) on the outside. The storage tank (31) is also connected to a water supply pipe (312) and a liquid level sensor (313). A water supply solenoid valve (314) is installed on the water supply pipe (312). The liquid level sensor (313) is electrically connected to the water supply solenoid valve (314).

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