Mountain photovoltaic rainwater collection and utilization system

Abstract

The utility model discloses a mountain photovoltaic rainwater collection and utilization system which comprises a water collection tank, a spraying device, a container and a water pump, the water collection tank is installed on the lower edge of a photovoltaic assembly, the spraying device is installed on the upper side of the photovoltaic assembly, the water collection tank is communicated with the container through a water diversion pipeline, and a water inlet of the water pump is communicated with the container. The water diversion pipeline comprises a first pipeline, a first valve, a second pipeline and a second valve, one end of the first pipeline is communicated with the water collecting tank, the first valve is installed on the first pipeline, and the second pipeline used for leading water into the container is connected to the portion, located on the upstream side of the first valve, of the first pipeline. And a second valve is mounted on the second pipeline. In the earlier stage of rainwater, rainwater carrying much dust in the earlier stage is discharged out of the first pipeline, and after a period of time, relatively clean rainwater in the later stage enters the container and then is pumped to the spraying device through the water pump for pressure spraying and washing, so that the cleaning effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic panel cleaning technology, and in particular to a mountain photovoltaic rainwater collection and utilization system. Background Art

[0002] Installing photovoltaic panels on mountainous terrain for solar power generation offers advantages such as abundant sunshine and wide terrain. However, dust accumulates on the panels after installation, affecting their power generation efficiency. Given the scarcity of water resources in mountainous areas, our company's technicians have proposed a solution to collect rainwater for cleaning the photovoltaic panels.

[0003] In the prior art, Chinese patent document CN 221948130 U, published on November 1, 2024, discloses a photovoltaic panel array water washing system. Its features include: a rotating nozzle on a rotating nozzle assembly that automatically rotates while spraying water, requiring no additional drive, to wash the side panels from all directions. High-pressure water is sprayed onto the photovoltaic panels, with the spray point located below the inclined surface, allowing water to clean the entire panel from bottom to top. This system is suitable for water-rich areas in the south. However, its shortcomings are: firstly, the water tank requires a tap water supply, making it impossible to utilize rainwater; secondly, the rotating spray method for cleaning the photovoltaic panels, coupled with the inclined structure of the panels and the rotating nozzle located between the front and rear rows, results in the rear panels being sprayed while the front panels are not, leading to water waste.

[0004] Additionally, Chinese patent document CN206810746U, published on December 29, 2017, discloses a rainwater harvesting and cleaning device for photovoltaic greenhouse modules. The device includes a water collection trough, a storage tank, and a spraying device. The water collection trough is located at the lowest point of the photovoltaic modules, and both ends are connected to the storage tank via water pipes. A lift pump is installed in the storage tank, and the outlet of the lift pump is connected to the spraying device via a water pipe. The spraying device includes a spray pipe and spray heads mounted on the spray pipe, which can slide along the surface of the photovoltaic modules. Its advantage is that it can harvest rainwater to clean the photovoltaic panels. Its disadvantage is that the rainwater carries a significant amount of dust after passing through the photovoltaic panels; if all of it is harvested, it would be equivalent to repeatedly spraying the dust-laden wastewater onto the photovoltaic panels, resulting in poor cleaning effectiveness. Utility Model Content

[0005] To address the existing technical problems, the main objective of this utility model is to provide a mountain photovoltaic rainwater harvesting and utilization system. In the early stages of rain, the first valve is opened and the second valve is closed, allowing the rainwater carrying more dust to be discharged through the first pipe. After a period of time, the first valve is closed and the second valve is opened, allowing the relatively cleaner rainwater to enter the container. The water is then pumped to a spraying device for pressure spraying and rinsing, thereby improving the cleaning effect.

[0006] To overcome the problems existing in the prior art, the technical solution adopted by this utility model is: a mountain photovoltaic rainwater collection and utilization system, including a water collection tank, a spray device, a container, and a water pump. The water collection tank is installed on the lower edge of the photovoltaic module, and the spray device is installed on the upper side of the photovoltaic module. The water collection tank is connected to the container through a water inlet pipe. The water inlet of the water pump is connected to the container, and the water outlet is connected to the spray device through a water supply pipe. The water inlet pipe includes a first pipe, a first valve, a second pipe, and a second valve. One end of the first pipe is connected to the water collection tank, and the other end is open. The first valve is installed on the first pipe. A second pipe for introducing water into the container is connected to the first pipe upstream of the first valve. The second valve is installed on the second pipe.

[0007] The spraying device is provided in multiple ways, and the downstream end of the water supply pipe is connected to multiple branch pipes corresponding to the number of spraying devices. A third valve is installed on the branch pipe.

[0008] It also includes a controller and a rain sensor. The rain sensor is used to detect the amount of rainfall in the photovoltaic module area. The first valve, the second valve, and the third valve are solenoid valves. The signal input terminal of the controller is electrically connected to the rain sensor, and the signal output terminal of the controller is electrically connected to the first valve, the second valve, the third valve, and the water pump, respectively.

[0009] The container is also equipped with an electronic level gauge, which is electrically connected to the signal input terminal of the controller.

[0010] The container is also equipped with a drain pipe on its lower side, and a fourth valve is installed on the drain pipe. The fourth valve is a solenoid valve and is electrically connected to the signal output terminal of the controller.

[0011] The water collection tank is connected to the crossbeam on the lower side of the photovoltaic support by multiple first bolts.

[0012] The spraying device includes a spray pipe and multiple nozzles installed on the spray pipe. One end of multiple clamp brackets is connected to the crossbeam on the upper side of the photovoltaic bracket by a second bolt, and the other end is installed and connected to the spray pipe.

[0013] The water collection tank is in a state where one end is higher than the other, or the bottom of the water collection tank has a structure where one end is higher than the other, and the first pipe is connected to the lower end of the water collection tank.

[0014] The present invention has the following beneficial effects:

[0015] 1. In the early stage of rain, the first valve is opened and the second valve is closed, so that the rainwater carrying more dust in the early stage is discharged out of the first pipe. After a period of time, the first valve is closed and the second valve is opened, so that the relatively clean rainwater in the later stage enters the container and is then pumped to the spraying device for pressure spraying and rinsing, thereby improving the cleaning effect.

[0016] 2. The multiple spray devices of this utility model are respectively installed on different photovoltaic modules. During cleaning, the corresponding third valve is opened to clean the corresponding photovoltaic module. In this way, while ensuring the spray cleaning pressure, one water pump can clean multiple photovoltaic modules.

[0017] 3. This utility model also includes a controller and a rain sensor to realize automatic control of valves and water pumps. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a side view of the structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the main structure of this utility model.

[0021] Figure 3 This is a front view schematic diagram of the cleaning structure of multiple photovoltaic modules according to this utility model.

[0022] Figure 4 for Figure 1 Enlarged structural diagram at point A in the middle.

[0023] Figure 5 for Figure 1 Enlarged structural diagram at point B.

[0024] Figure 6 This is the control diagram of this utility model.

[0025] Figure label:

[0026] 10 photovoltaic modules;

[0027] Photovoltaic bracket 20, longitudinal beam 21, transverse beam 22, clamp bracket 23, second bolt 24;

[0028] Water collection tank 30, first pipe 31, first valve 32, second pipe 33, second valve 34, first bolt 35;

[0029] Spraying device 40, spray pipe 41, nozzle 42;

[0030] Container 50, drain pipe 51, fourth valve 52, electronic level gauge 53;

[0031] Water pump 60, water supply pipe 61, branch pipe 62, third valve 63;

[0032] Controller 70;

[0033] Rain gauge 80. Detailed Implementation

[0034] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0035] Example 1:

[0036] See Figure 1 , 2 This utility model provides a mountain photovoltaic rainwater harvesting and utilization system, including a water collection tank 30, a spray device 40, a container 50, and a water pump 60. The water collection tank 30 is installed on the lower edge of the photovoltaic module 10, and the spray device 40 is installed on the upper side of the photovoltaic module 10. The water collection tank 30 is connected to the container 50 through a water inlet pipe. The water inlet of the water pump 60 is connected to the container 50, and the water outlet is connected to the spray device 40 through a water supply pipe 61. The water inlet pipe includes a first pipe 31, a first valve 32, a second pipe 33, and a second valve 34. One end of the first pipe 31 is connected to the water collection tank 30, and the other end is open. The first valve 32 is installed on the first pipe 31. A second pipe 33 for introducing water into the container 50 is connected to the first pipe 31 upstream of the first valve 32. The second valve 34 is installed on the second pipe 33.

[0037] In use, in the early stages of rain, the first valve 32 is opened and the second valve 34 is closed, allowing the rainwater carrying more dust to be discharged through the first pipe 31. After a period of time, the first valve 32 is closed and the second valve 34 is opened, allowing the relatively cleaner rainwater to enter the container 50. Then, the water pump 60 pumps the water to the spray device 40 for pressure spraying and rinsing, thereby improving the cleaning effect.

[0038] See Figure 1 The photovoltaic support 20 includes a column, on which a longitudinal beam 21 is installed, and on the longitudinal beam 21 a plurality of cross beams 22 are installed, and the photovoltaic panels are installed on the cross beams 22.

[0039] In this embodiment, see Figure 4 The water collection tank 30 is connected to the crossbeam 22 on the lower side of the photovoltaic bracket 20 by multiple first bolts 35.

[0040] Furthermore, in this embodiment, see Figure 2 , 5 The spray device 40 includes a spray pipe 41 and multiple nozzles 42 installed on the spray pipe 41. One end of multiple clamp brackets 23 is connected to the crossbeam 22 on the upper side of the photovoltaic bracket 20 by a second bolt 24, and the other end is installed and connected to the spray pipe 41.

[0041] Furthermore, in order to increase the water flow velocity within the collection tank 30 and reduce the formation of sediments within the tank 30, see [reference needed]. Figure 2 , 3 The water collection tank 30 is in a state where one end is higher than the other, or the bottom of the water collection tank 30 has a structure where one end is higher than the other, and the first pipe 31 is connected to the lower end of the water collection tank 30.

[0042] Example 2:

[0043] Based on implementation 1, see Figure 3 Multiple spray devices 40 are provided, and multiple branch pipes 62 are connected to the downstream end of the water supply pipe 61 corresponding to the number of spray devices 40. A third valve 63 is installed on the branch pipe 62.

[0044] In use, multiple spray devices 40 are installed on different photovoltaic modules 10. During cleaning, the corresponding third valve 63 is opened to clean the corresponding photovoltaic module 10. In this way, multiple photovoltaic modules 10 can be cleaned by one water pump 60, while ensuring the pressure during spray cleaning.

[0045] Example 3:

[0046] Based on implementation 1 or 2, see Figure 3 , 6 This invention also includes a controller 70 and a rain sensor 80. The rain sensor 80 is used to detect rainfall in the area of ​​the photovoltaic module 10. The first valve 32, the second valve 34, and the third valve 63 are solenoid valves. The signal input terminal of the controller 70 is electrically connected to the rain sensor 80, and the signal output terminal of the controller 70 is electrically connected to the first valve 32, the second valve 34, the third valve 63, and the water pump 60, respectively. Through the above structure, automatic valve control is achieved.

[0047] In this embodiment, the controller 70 is a PLC, and the rain sensor 80 is an FT-G1 type optical rain sensor.

[0048] Furthermore, in order to detect the water level inside container 50 and control the start and stop of water pump 60, an electronic level gauge 53 is also installed on container 50. The electronic level gauge 53 is electrically connected to the signal input terminal of controller 70. When the water level inside container 50 reaches the preset water level, controller 70 controls water pump 60 to start; if the water level is lower than the minimum water level, controller 70 controls water pump 60 to stop.

[0049] Specifically, the electronic level gauge 53 can be a magnetostrictive level gauge.

[0050] In order to drain the water inside the container 50, a drain pipe 51 is installed on the lower side of the container 50. A fourth valve 52 is installed on the drain pipe 51. The fourth valve 52 is a solenoid valve and is electrically connected to the signal output terminal of the controller 70.

[0051] After cleaning, the fourth valve 52 is opened to drain the water from container 50, thereby reducing the formation of sediment in container 50.

[0052] The working steps or principle of this utility model are as follows:

[0053] When in use, the controller 70 is powered on, and the rain sensor 80 detects the rain and rainfall in the area of ​​the photovoltaic module 10. During the initial period of rain or when the rainfall is within the set threshold, which is the early stage of rain, the first valve 32 is opened and the second valve 34 is closed, so that the rainwater carrying more dust in the early stage is discharged through the first pipe 31.

[0054] After a period of time since the start of rain or after the rainfall exceeds the threshold, the controller 70 opens the second valve 34 through the first valve 32, allowing relatively clean rainwater to enter the container 50. Once the liquid level is reached, the controller 70 controls the water pump 60 to start, which pumps the water in the container 50 to the spray device 40 for pressure spraying and rinsing, thereby improving the cleaning effect.

[0055] When multiple spray devices 40 are installed, during cleaning, the corresponding third valve 63 is opened sequentially by the controller 70 to clean the corresponding photovoltaic module 10. This ensures that one water pump 60 can clean multiple photovoltaic modules 10 while maintaining the spray cleaning pressure.

[0056] After cleaning, controller 70 controls the fourth valve 52 to open, draining the water from container 50. In one embodiment, the water in container 50 can be discharged into a water cellar for collection and use in irrigation.

Claims

1. A mountain photovoltaic rainwater harvesting and utilization system, comprising a water collection tank (30), a spray device (40), a container (50), and a water pump (60), wherein the water collection tank (30) is installed on the lower edge of a photovoltaic module (10), the spray device (40) is installed on the upper side of the photovoltaic module (10), the water collection tank (30) is connected to the container (50) through a water inlet pipe, the inlet of the water pump (60) is connected to the container (50), and the outlet is connected to the spray device (40) through a water supply pipe (61), characterized in that: The water supply pipeline includes a first pipe (31), a first valve (32), a second pipe (33), and a second valve (34). One end of the first pipe (31) is connected to the water collection tank (30), and the other end is open. The first valve (32) is installed on the first pipe (31). The second pipe (33) for introducing water into the container (50) is connected to the first pipe (31) upstream of the first valve (32). The second valve (34) is installed on the second pipe (33).

2. The mountain photovoltaic rainwater harvesting and utilization system according to claim 1, characterized in that: The spray device (40) is provided in multiple ways. The downstream end of the water supply pipe (61) is connected to multiple branch pipes (62) corresponding to the number of spray devices (40). A third valve (63) is installed on the branch pipe (62).

3. The mountain photovoltaic rainwater harvesting and utilization system according to claim 2, characterized in that: It also includes a controller (70) and a rain sensor (80), the rain sensor (80) being used to detect the amount of rainfall in the area of ​​the photovoltaic module (10), the first valve (32), the second valve (34) and the third valve (63) being solenoid valves, the signal input terminal of the controller (70) being electrically connected to the rain sensor (80), and the signal output terminal of the controller (70) being electrically connected to the first valve (32), the second valve (34), the third valve (63) and the water pump (60) respectively.

4. The mountain photovoltaic rainwater harvesting and utilization system according to claim 3, characterized in that: An electronic level gauge (53) is also installed on the container (50), and the electronic level gauge (53) is electrically connected to the signal input terminal of the controller (70).

5. The mountain photovoltaic rainwater harvesting and utilization system according to claim 3 or 4, characterized in that: The container (50) is also equipped with a drain pipe (51) on its lower side. A fourth valve (52) is installed on the drain pipe (51). The fourth valve (52) is a solenoid valve and is electrically connected to the signal output terminal of the controller (70).

6. The mountain photovoltaic rainwater harvesting and utilization system according to claim 1, characterized in that: The water collection tank (30) is connected to the crossbeam (22) on the lower side of the photovoltaic bracket (20) by a plurality of first bolts (35).

7. The mountain photovoltaic rainwater harvesting and utilization system according to claim 1 or 6, characterized in that: The spray device (40) includes a spray pipe (41) and multiple nozzles (42) installed on the spray pipe (41). One end of multiple clamp brackets (23) is connected to the crossbeam (22) on the upper side of the photovoltaic bracket (20) by a second bolt (24), and the other end is installed and connected to the spray pipe (41).

8. The mountain photovoltaic rainwater harvesting and utilization system according to claim 1, characterized in that: The water collection tank (30) is in a state where one end is high and the other end is low, or the bottom of the water collection tank (30) is a structure where one end is high and the other end is low, and the first pipe (31) is connected to the lower end of the water collection tank (30).

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