Photovoltaic module surface operation and maintenance system

Abstract

The utility model discloses photovoltaic module surface operation and maintenance system, including heating device, low position tank, spray system, delivery pump, and low position tank is connected with the delivery main pipe, and the delivery pump is installed on the delivery main pipe, and a plurality of delivery branch pipes are connected on the delivery main pipe, and the spray system includes a plurality of spray units, and one spray unit is connected with one delivery branch pipe, and the photovoltaic module is equipped with the turnover mechanism, the utility model discloses can make the water in low position tank flow to each spray unit among through the delivery main pipe directly, or make the water in low position tank obtain temperature promotion and flow to each spray unit among, adapt to more to photovoltaic panel surface spray cleaning scene. The turnover mechanism drives the spray unit to overturn to the photovoltaic panel above or below, when the spray unit is above the photovoltaic panel, the spray unit sprays towards the photovoltaic panel surface, realizes surface cleaning, when the spray unit is below the photovoltaic panel, the photovoltaic panel can form the shelter to the spray unit, forms the protection effect and reduces the operation influence to the photovoltaic panel.

Description

Technical Field

[0001] This utility model relates to a surface maintenance system for photovoltaic modules. Background Technology

[0002] Photovoltaic modules consist of photovoltaic (PV) brackets and PV panels mounted on the brackets. The PV panels receive sunlight and convert it into electricity to generate power. To ensure the stability of the PV panel's photoelectric conversion, its surface needs to be sprayed clean to allow it to reliably receive sunlight. However, in winter, with snow or ice, the PV panel surface may freeze, affecting power generation. Therefore, it is necessary to develop an operation and maintenance system for the PV panel surface that can adapt to both winter and everyday conditions. Utility Model Content

[0003] To address the aforementioned technical problems, the purpose of this utility model is to provide a photovoltaic module surface maintenance system with good adaptability.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] The photovoltaic module surface maintenance system includes heating devices, low-level boxes, spray systems, and transfer pumps.

[0006] The low-level box is connected to the main conveying pipeline, and the conveying pump is installed on the main conveying pipeline;

[0007] Multiple branch pipelines are connected to the main pipeline.

[0008] The sprinkler system includes multiple sprinkler units, and each sprinkler unit is connected to the end of a delivery branch pipe.

[0009] The heating device is connected to a secondary side inlet pipe and a secondary side outlet pipe; the secondary side inlet pipe and the secondary side outlet pipe are connected to the main conveying pipeline; a first control valve is installed on the secondary side inlet pipe; a second control valve is installed on the main conveying pipeline between the secondary side inlet pipe and the secondary side outlet pipe; the first control valve and the second control valve are not opened at the same time.

[0010] A first temperature sensor is installed in the low-level box, and a second temperature sensor is installed on the main conveying pipeline near the spray system.

[0011] The photovoltaic module is equipped with a flipping mechanism that flips the spray unit upwards to above the photovoltaic panel or downwards to below the photovoltaic panel.

[0012] As a further implementation, a flow sensor for detecting the flow rate of fluid in the delivery branch pipe and a regulating valve for adjusting the flow rate of fluid in the delivery branch pipe are installed on the delivery branch pipe; the flow sensor and the regulating valve are connected by a signal.

[0013] As a further implementation, a high-level box is also included, which is connected to the low-level box by a connecting pipe, and a third control valve is installed on the connecting pipe.

[0014] As a further embodiment, the flipping mechanism includes a pair of fixed seats, a pair of rotating sleeves, and a flipping drive;

[0015] A pair of mounting brackets are respectively fixedly mounted on the two legs of the photovoltaic module;

[0016] A pair of rotating sleeves are respectively rotated and assembled on a pair of fixed seats;

[0017] Each of the two rotating sleeves has a mounting hole, and the mounting holes of the two rotating sleeves are arranged coaxially in the horizontal direction;

[0018] The flip drive is mounted on the photovoltaic module support leg and is used to drive a rotating sleeve to rotate.

[0019] A flipping frame extending outwards from the outer periphery of each pair of rotating sleeves is also fixedly installed.

[0020] As a further implementation, the spray unit includes a central pipe, an intermediate pipe, and an outer pipe;

[0021] The two ends of the central pipe are respectively fitted into the mounting holes in a pair of rotating sleeves;

[0022] One end of the central pipe passes through the fixed seat and protrudes to the outside. A rotary joint that communicates with the delivery branch pipe is installed on the protruding end.

[0023] The outer pipe is installed at the extended end of the tilting frame, and multiple spray heads are installed at intervals along its length on the outer pipe.

[0024] The middle pipe connects the central pipe and the outer pipe.

[0025] As a further implementation scheme, one end of the intermediate pipe is connected to the central pipe via a first tee connector;

[0026] The other end of the middle pipe is connected to the outer pipe via a second tee connector.

[0027] As a further implementation plan, the central pipe and the outer pipe are each composed of two pipe sections arranged coaxially.

[0028] By adopting the above technical solution, this utility model can switch between the first control valve and the second control valve to allow water in the low-level tank to flow directly to each spray unit through the main pipeline, or to allow water in the low-level tank to be heated to a certain temperature before flowing to each spray unit, thus adapting to more scenarios of spray cleaning of photovoltaic panel surfaces.

[0029] In addition, the design of the flipping mechanism can drive the spray unit to flip above or below the photovoltaic panel. When the spray unit flips above the photovoltaic panel, the water sprayed onto the surface of the photovoltaic panel can flow from the higher end to the lower end of the photovoltaic panel surface, thus cleaning the surface of the photovoltaic panel. When cleaning is not required, the flipping mechanism drives the spray unit to flip below the photovoltaic panel, so that the photovoltaic panel can shield the spray unit, providing a certain degree of protection and preventing it from affecting the operation of the photovoltaic panel. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the system of this utility model;

[0031] Figure 2 This is a schematic diagram of the flipping mechanism in this utility model;

[0032] Figure 3 This is a schematic diagram showing how the flipping mechanism of this utility model drives the spray unit to flip over onto the photovoltaic panel;

[0033] Figure 4 This is a schematic diagram showing how the flipping mechanism of this utility model drives the spray unit to flip under the photovoltaic panel;

[0034] The labels in the attached diagram represent the following:

[0035] 1. Heating unit; 2. Low-level tank; 3. Delivery pump; 4. Main delivery pipeline; 5. Branch delivery pipeline; 6. Spray unit; 7. Secondary side inlet pipe; 8. Secondary side outlet pipe; 9. First control valve; 10. Second control valve; 11. First temperature sensor; 12. Second temperature sensor; 13. Tilting mechanism; 14. Flow sensor; 15. Regulating valve; 16. High-level tank; 17. Connecting pipeline; 18. Third control valve; 19. Fixed seat; 20. Rotating sleeve; 21. Support leg; 22. Mounting plate; 23. Electric cylinder; 24. Slider; 25. Slide rail; 26. Rack; 27. Gear; 28. Central pipeline; 29. ​​Intermediate pipeline; 30. Outer pipeline; 31. Rotary joint; 32. Tilting frame; 33. First tilting section; 34. Second tilting section; 35. Spray head; 36. First tee joint; 37. Second tee joint; 38. Bracket; 39. Limiting post. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] See Figure 1 , 4 As shown, the photovoltaic module surface maintenance system primarily involves cleaning the surface of the photovoltaic panels, ensuring they receive sunlight in a relatively clean environment and guaranteeing their normal operation. The system mainly includes a heating device 1, a low-level tank 2, a spray system, and a transfer pump 3. The temperature of the medium flowing through the heating device 1 is higher than the temperature of the water stored in the low-level tank 2. In actual construction, the heating device 1 can be high-temperature exhaust gas or wastewater from the factory, or it can be a solar water collection tank. Through non-contact heat exchange, it exchanges heat with the water in the low-level tank 2. Specifically, water from the low-level tank 2 is passed through heat exchange pipes into the heating device 1, allowing it to exchange heat with the fluid within the heating device 1, thus raising the temperature of the water discharged from the low-level tank 2. The low-level tank 2 stores water, serving as the water source for the maintenance system and providing clean water. The spray system sprays the clean water onto the surface of the photovoltaic panels for cleaning. The transfer pump 3 pumps water from the low-level tank 2 to the spray system.

[0038] Specifically, the bottom of the low-level tank 2 is connected to the main conveying pipeline 4, and the conveying pump 3 is installed on the main conveying pipeline 4. The water in the low-level tank 2 flows through the main conveying pipeline 4 with the power provided by the conveying pump 3. Multiple conveying branch pipelines 5 are connected to the main conveying pipeline 4 at intervals. The water in the main conveying pipeline 4 can flow into the conveying branch pipelines 5 to form a diversion.

[0039] The sprinkler system includes multiple sprinkler units 6, each sprinkler unit 6 being connected to the end of a delivery branch pipe 5. Water in the delivery branch pipe 5 can be sprayed onto the photovoltaic panel surface through the sprinkler unit 6. The heating device 1 is connected to a secondary side inlet pipe 7 and a secondary side outlet pipe 8. The secondary side inlet pipe 7 and the secondary side outlet pipe 8 are connected in parallel to the main delivery pipe 4. A first control valve 9 is installed on the secondary side inlet pipe 7, and a second control valve 10 is installed on the main delivery pipe 4 between the secondary side inlet pipe 7 and the secondary side outlet pipe 8. The first control valve 9 and the second control valve 10... Control valve 10 does not open simultaneously; when using high-temperature exhaust gas or wastewater discharged from the factory, the heating device 1 can use a heat exchanger. The primary side inlet and outlet of the heat exchanger are used for the inlet and outlet of high-temperature wastewater or exhaust gas, providing high temperature to the secondary side, so that the water from the low-level tank 2 on the secondary side can be heated; when using a solar water collection tank, the secondary side inlet and outlet pipes can use a coil (located in the solar water collection tank) or a spiral pipe (surrounding the outer circumference of the solar water collection tank) connected to it to perform non-contact heat exchange with the high-temperature water in the solar water collection tank.

[0040] There are two paths for the water in the low-level tank 2 to flow to the spray unit 6. One is to close the first control valve 9 and open the second control valve 10, so that the water in the low-level tank 2 flows directly to each spray unit 6 through the main conveying pipe 4. The other is to open the first control valve 9 and close the second control valve 10, so that the water in the low-level tank 2 flows through the secondary side inlet pipe 7 and the secondary side outlet pipe 8, and then flows through the main conveying pipe 4 to each spray unit 6. This process is used when water with a certain temperature is needed to spray and clean the surface of the photovoltaic panel.

[0041] A first temperature sensor 11 is installed in the low-level tank 2, and a second temperature sensor 12 is installed on the main conveying pipe 4 near the spray system. The first temperature sensor 11 is used to monitor the water temperature in the low-level tank 2, and the second temperature sensor is used to monitor the water temperature output towards the spray unit 6. When the water in the low-level tank 2 passes through the heating device 1, the water temperature after heat exchange can be monitored. When the temperature is lower than the set threshold, the conveying capacity of the conveying pump 3 can be reduced. When the temperature is higher than the set threshold, the conveying capacity of the conveying pump 3 can be increased, so as to stabilize the water temperature delivered towards the spray unit 6.

[0042] A flipping mechanism 13 is provided on the photovoltaic module to flip the spray unit 6 upwards above the photovoltaic panel or downwards below the photovoltaic panel. When it is necessary to spray the surface of the photovoltaic panel, the flipping mechanism 13 flips the spray unit 6 upwards towards the photovoltaic panel. The flipping mechanism 13 is set on the support leg at the higher end of the photovoltaic module, that is, the flipped spray unit 6 is at the higher end of the photovoltaic panel. In this way, the water sprayed towards the surface of the photovoltaic panel can flow from the higher end of the photovoltaic panel to the lower end, thereby cleaning the surface of the photovoltaic panel. When cleaning is not required, the flipping mechanism 13 drives the spray unit 6 to flip downwards towards the photovoltaic panel, so that the photovoltaic panel can shield the spray unit 6, providing a certain degree of protection and preventing it from being above the photovoltaic panel and affecting its operation.

[0043] In some embodiments, a flow sensor 14 for detecting the flow rate of fluid within the delivery branch pipe 5 and a regulating valve 15 for adjusting the flow rate of fluid within the delivery branch pipe 5 are installed on the delivery branch pipe 5; the flow sensor 14 and the regulating valve 15 form a signal connection. The inner diameter of the main delivery pipe 4 is larger than the inner diameter of the delivery branch pipe 5, and the internal delivery flow rate of the main delivery pipe 4 is greater than the internal delivery flow rate of the delivery branch pipe 5, so that the main delivery pipe 4 can match the fluid delivery of a pair of multiple delivery branch pipes 5; through the cooperation of the flow sensor 14 and the regulating valve 15, the flow rate entering each delivery branch pipe 5 can be balanced, that is, by monitoring the flow sensor 14, the opening degree of the regulating valve 15 is adjusted so that the flow rate in the delivery branch pipe 5 tends to a set threshold.

[0044] In some embodiments, a high-level tank 16 is also included, which is relative to the low-level tank 2, meaning that the height of the high-level tank 16 is higher than that of the low-level tank 2. Under the action of gravity, the fluid in the high-level tank 16 can automatically flow into the low-level tank 2. The high-level tank 16 and the low-level tank 2 are connected by a connecting pipe 17, and a third control valve 18 is installed on the connecting pipe 17 to control the flow of fluid from the high-level tank 16 to the low-level tank 2. An auxiliary liquid, such as a liquid de-icing agent, can be added to the high-level tank 16, and the corresponding de-icing agent can be added to the low-level tank for use when there is snow accumulation on the surface of the photovoltaic panel.

[0045] When using de-icing agents, they can be used in conjunction with heat exchange through heating device 1 to increase the spray water temperature and enhance the snow melting ability. After using de-icing agents to remove snow, the surface of the photovoltaic panels can be cleaned by continuing to spray without de-icing agents, reducing the residue of de-icing agents on the surface of the photovoltaic panels and correspondingly reducing the damage of de-icing agents to the surface of the photovoltaic panels.

[0046] The high-level tank 16 and the low-level tank 2 are also connected to corresponding replenishment pipes to replenish de-icing agent to the high-level tank 16 and water to the low-level tank 2. The first control valve 9, the second control valve 10, and the third control valve 18 can be driven by electric actuators or operated manually, depending on the needs.

[0047] In some embodiments, the height of the low-level box 2 is set higher than the height of the spray unit 6. Before the arrival of freezing weather, water can be allowed to drip out of the spray unit 6 by opening the second control valve 10 and the regulating valve 15 on each small-angle opening delivery branch pipe 5, so that the water has fluidity and the risk of freezing of the spray unit 6 pipeline can be reduced.

[0048] In some embodiments, the flipping mechanism 13 includes a pair of fixed seats 19, a pair of rotating sleeves 20, and a flipping drive. The pair of fixed seats 19 are respectively fixedly mounted on the two legs 21 of the photovoltaic module, that is, one fixed seat 19 is fixedly mounted on one leg 21 by bolts. Here, the two legs 21 are the two below the higher end of the photovoltaic module. The pair of rotating sleeves 20 are respectively rotatably mounted on the pair of fixed seats 19, that is, one rotating sleeve 20 is mounted on one fixed seat 19 by bearings. An installation groove is provided on the inner side of the fixed seat 19, and the rotating sleeve 20 is fitted with a bearing on its outer periphery. The bearing is mounted in the installation groove, so that the rotating sleeve 20 can rotate relative to the fixed seat 19. The pair of rotating sleeves 20 each have a mounting hole, and the mounting holes of the pair of rotating sleeves 20 are arranged coaxially in the horizontal direction. That is, after projection from the outside of the rotating sleeve 20 toward the inside, the mounting holes on the two rotating sleeves 20 coincide.

[0049] The flip drive is mounted on the photovoltaic module support leg and drives a rotating sleeve 20 to rotate. The flip drive includes a mounting plate 22, an electric cylinder 23, a slider 24, a slide rail 25, a rack 26, and a gear 27. The mounting plate 22 has an L-shaped structure, with one folded edge fixed to the photovoltaic module support leg and the other folded edge providing a corresponding mounting position for the flip drive. The slide rail 25 is mounted on the mounting plate 22, the slider 24 is slidably mounted on the slide rail 25, the rack 26 is fixedly mounted on the slider 24, and the gear 27 is fixedly mounted on the slide rail 25. The outer periphery of the rotating sleeve 20 is connected to the gear 27 and the rack 26 for meshing transmission. The drive end of the electric cylinder 23 is connected to one end of the slider 24. The body of the electric cylinder 23 is mounted on the support leg through the bracket 38. The extension and retraction of the electric cylinder 23 drives the slider 24 to slide up and down on the slide rail 25, which can drive the rack 26 to slide vertically. In other words, the rack 26 drives the gear 27 to rotate, and the rotating sleeve 20 can also rotate, thereby driving the central pipe to flip, which in turn enables the entire spray unit 6 to flip.

[0050] In some embodiments, the spray unit 6 includes a central pipe 28, an intermediate pipe 29, and an outer pipe 30. Both ends of the central pipe 28 are respectively fitted into mounting holes within a pair of rotating sleeves 20. The central pipe 28 and the mounting holes can be locked together by screws screwed into the outer surface of the rotating sleeves 20, preventing the central pipe 28 from rotating within the mounting holes. Alternatively, a polygonal structure can be used between the mounting holes and the central pipe 28 to enhance connection stability; for example, the inner circumference of the mounting hole can be hexagonal, and the outer circumference of the central pipe 28 can be a corresponding hexagon. One end of the central pipe 28 passes through the fixing seat 19 and protrudes to the outside. A rotary joint 31, communicating with the delivery branch pipe 5, is installed on this protruding end, allowing fluid in the delivery branch pipe 5 to enter the central pipe 28 through the rotary joint.

[0051] A flipping frame 32 extending outward from the outer periphery of each pair of rotating sleeves 20 is fixedly installed. The outer pipe 30 is installed at the extended end of the flipping frame 32. The flipping frame 32 installs the outer pipe 30 on the outside of the central pipe 28. When the central pipe 28 rotates, the outer pipe 30 tends to flip. The flipping frame 32 is composed of a first flipping section 33 and a second flipping section 34 arranged vertically. The first flipping section 33 is fixedly connected to the rotating sleeve 20 (e.g., by welding or screw connection). The second flipping section 34 is used for the installation of the outer pipe 30. Mounting holes are opened on the second flipping section 34 for the assembly of the outer pipe 30. Screws can be inserted into the mounting holes on the second flipping section to abut against the outer periphery of the outer pipe 30 for positioning. The intermediate pipe 29 adopts a structural design corresponding to the flipping frame 32.

[0052] The intermediate pipe 29 connects the central pipe 28 and the outer pipe 30. The fluid entering the central pipe 28 can be guided to the outer pipe 30 through the intermediate pipe 29. Multiple spray heads 35 are installed at intervals along the length of the outer pipe 30. The two ends of the outer pipe 30 are closed. The fluid is sprayed towards the higher end of the photovoltaic panel surface through the spray heads 35 and flows towards the lower end.

[0053] In some embodiments, one end of the intermediate pipe 29 is connected to the central pipe 28 via a first tee connector 36; the other end of the intermediate pipe 29 is connected to the outer pipe 30 via a second tee connector 37. The central pipe 28 and the outer pipe 30 are each composed of two pipe sections arranged coaxially. One section of the central pipe 28 is a hollow tube used for swivel joint connection to allow fluid flow, while the other section, without a swivel joint, can be solid. This two-section design allows for adjustment of the pipe section length as needed, thereby changing the overall length of the central pipe 28 and the outer pipe 30 and improving the pipe's adaptability.

[0054] In some embodiments, limit posts 39 are respectively installed on the upper and lower sides of the mounting plate 22. The upper limit post is used to mechanically limit the tilting frame 32 when it tilts upward, and the lower limit post is used to mechanically limit the tilting frame 32 when it tilts downward. The tilting angle of the tilting frame 32 can be constrained by the length of the limit post. The tilting frame 32 can achieve a tilting angle greater than 180° by being driven by the tilting mechanism 13.

[0055] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A photovoltaic module surface maintenance system, including a heating device, a low-level box, a spray system, and a transfer pump, characterized in that, The low-level box is connected to the main conveying pipeline, and the conveying pump is installed on the main conveying pipeline; Multiple branch pipelines are connected to the main pipeline. The sprinkler system includes multiple sprinkler units, and each sprinkler unit is connected to the end of a delivery branch pipe. The heating device is connected to a secondary side inlet pipe and a secondary side outlet pipe; the secondary side inlet pipe and the secondary side outlet pipe are connected to the main conveying pipeline; a first control valve is installed on the secondary side inlet pipe; a second control valve is installed on the main conveying pipeline between the secondary side inlet pipe and the secondary side outlet pipe; the first control valve and the second control valve are not opened at the same time. A first temperature sensor is installed in the low-level box, and a second temperature sensor is installed on the main conveying pipeline near the spray system. The photovoltaic module is equipped with a flipping mechanism that flips the spray unit upwards to above the photovoltaic panel or downwards to below the photovoltaic panel.

2. The photovoltaic module surface maintenance system as described in claim 1, characterized in that, The delivery branch pipeline is equipped with a flow sensor to detect the flow rate of the fluid in the delivery branch pipeline and a regulating valve to adjust the flow rate of the fluid in the delivery branch pipeline; the flow sensor and the regulating valve are connected by a signal.

3. The photovoltaic module surface maintenance system as described in claim 1, characterized in that, It also includes a high-level box, which is connected to the low-level box by a connecting pipe, and a third control valve is installed on the connecting pipe.

4. The photovoltaic module surface maintenance system as described in claim 1, characterized in that, The flipping mechanism includes a pair of fixed seats, a pair of rotating sleeves, and a flipping drive; A pair of mounting brackets are respectively fixedly mounted on the two legs of the photovoltaic module; A pair of rotating sleeves are respectively rotated and assembled on a pair of fixed seats; Each of the two rotating sleeves has a mounting hole, and the mounting holes of the two rotating sleeves are arranged coaxially in the horizontal direction; The flip drive is mounted on the photovoltaic module support leg and is used to drive a rotating sleeve to rotate. A flipping frame extending outwards from the outer periphery of each pair of rotating sleeves is also fixedly installed.

5. The photovoltaic module surface maintenance system as described in claim 1, characterized in that, The spray unit includes a central pipe, intermediate pipes, and outer pipes; The two ends of the central pipe are respectively fitted into the mounting holes in a pair of rotating sleeves; One end of the central pipe passes through the fixed seat and protrudes to the outside. A rotary joint that communicates with the delivery branch pipe is installed on the protruding end. The outer pipe is installed at the extended end of the tilting frame, and multiple spray heads are installed at intervals along its length on the outer pipe. The middle pipe connects the central pipe and the outer pipe.

6. The photovoltaic module surface maintenance system as described in claim 1, characterized in that, One end of the intermediate pipe is connected to the central pipe via a first tee connector; The other end of the middle pipe is connected to the outer pipe via a second tee connector.

7. The photovoltaic module surface maintenance system as described in claim 5, characterized in that, The central pipe and the outer pipe are each composed of two pipe sections arranged coaxially.

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