Drainage device for photovoltaic panels

Abstract

The present application relates to photovoltaic module technical field, specifically point to a kind of photovoltaic power generation panel drainage device, drainage device is fixedly arranged on slide and is placed below the outside side angle of photovoltaic panel, when the angle between two photovoltaic panels is less than 180°, water flow can fall along photovoltaic panel to drainage device, drainage device includes drainage cylinder and drainage assembly, drainage assembly is slidably arranged in drainage cylinder, the lower end surface of photovoltaic panel is slidably provided with drainage rod, drainage rope is wound on bolt on drainage rod, reset rope is also helically wound on drainage rod, and the winding direction of reset rope and drainage rope is opposite, the free end of reset rope is connected with torsion spring for resetting, and torsion spring is fixedly arranged on the lower end surface of photovoltaic panel;The present application can effectively collect and discharge the water on the surface of photovoltaic panel under different angles, avoid the damage caused by water to photovoltaic panel, successfully realize while carrying out large-flow drainage, remove water droplet attached to photovoltaic panel inside.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic module technology, specifically to a drainage device for photovoltaic panels. Background Technology

[0002] With the continuous development of modern technology, green, energy-saving, and low-carbon construction designs have gradually become mainstream. Solar energy has long been regarded as a clean energy source to replace existing mineral energy, and the application of photovoltaic power generation in my country is becoming increasingly widespread. Because photovoltaic panels are modularly processed in factories and assembled on-site, drainage measures between photovoltaic panels are particularly important. Conventional photovoltaic modules are mainly waterproofed by applying glue, using adhesive strips, or welding to splice them together. This allows for normal use in the short term, but cracking and leakage are likely to occur in the long term.

[0003] Furthermore, as the sealing performance of photovoltaic panels increases, their heat dissipation capacity inevitably decreases. Due to the significant surface tension of rainwater, it is difficult to remove it through natural evaporation or other means after it penetrates into the photovoltaic panels.

[0004] Therefore, there is an urgent need for a drainage device for photovoltaic panels, which can drain large volumes of water while removing water droplets adhering to the inside of the photovoltaic panels during the drainage process. Summary of the Invention

[0005] The purpose of this invention is to provide a drainage device for photovoltaic panels, which is used for large-flow drainage and removes water droplets adhering to the inside of the photovoltaic panel during the drainage process.

[0006] This invention is achieved through the following technical solution:

[0007] A drainage device for a photovoltaic panel includes a group of photovoltaic panels that can rotate relative to each other. Both ends of the photovoltaic panels are rotatably connected to a slide. The slide is slidably mounted on a slide rail and its position is adjusted by a motor. The drainage device is fixedly mounted on the slide and positioned below the outer corner of the photovoltaic panel. When the angle between two photovoltaic panels is less than 180°, water can flow down the photovoltaic panel into the drainage device. The drainage device includes a drainage cylinder and a drainage assembly. The drainage assembly is slidably mounted in the drainage cylinder. A drainage rod is slidably mounted on the lower end face of the photovoltaic panel. A drainage rope is bolted around the drainage rod. A reset rope is also spirally wound around the drainage rod, and the winding direction of the reset rope is opposite to that of the drainage rope. The free end of the reset rope is connected to a torsion spring for reset. The torsion spring is fixedly mounted on the lower end face of the photovoltaic panel.

[0008] The drainage cylinder is equipped with a partition, and the partition has several water troughs. The drainage assembly includes a slide cylinder located below the partition, a slide seat slidably disposed within the slide cylinder, and a support rod rotatably disposed around the outer periphery of the slide seat. A drainage plate is rotatably connected to the free end of the support rod, and the end of the drainage plate is rotatably disposed on the side of the water trough near the slide cylinder. The slide seat is fixedly connected to the drainage rope. A buckle is also provided on the side of the water trough away from the slide cylinder. In the initial state, the torsion spring exerts a tension force on the drainage rope, causing the drainage plate to engage with the buckle and block the water trough. When the water pressure accumulated in the drainage cylinder is greater than the tension of the drainage rope, the buckle is released under pressure, causing the drainage plate to rotate downwards and enter the drainage state. When the water pressure in the drainage cylinder is less than the tension of the drainage rope, the reset rope moves upwards through the torsion spring, causing the drainage plate to engage with the buckle and return to the initial state.

[0009] Furthermore, the drainage process of the drainage device is a cyclic switching process between the initial state and the drainage state. During the switching process from the initial state to the drainage state, the drainage rod moves downward spirally below the photovoltaic panel, causing the water pressure on the lower end of the photovoltaic panel to dissipate. During the switching process from the drainage state to the initial state, the drainage rod moves upward spirally below the photovoltaic panel, causing the water pressure on the lower end of the photovoltaic panel to dissipate.

[0010] Furthermore, a sealing assembly is provided between the two photovoltaic panels that are rotated.

[0011] Furthermore, the sealing assembly includes a snap plate disposed on the outer periphery of the photovoltaic panel, a hinge plate fixedly connected to the end of the snap plate, the hinge plate between the two photovoltaic panels being rotatably disposed via a hinge shaft, a plastic layer being disposed on the side of the hinge plate away from the hinge shaft, a buffer layer being disposed on one side of the plastic layer, and the buffer layer abutting against the photovoltaic panel, a gap existing between the photovoltaic panel and the snap plate, and the drainage rod being disposed within the gap.

[0012] Furthermore, the buckle is rotatably mounted on the water tank and reset by a spring, the lower end face of the buckle is rounded, and the surface of the buckle that contacts the lower end face of the drain plate is flat.

[0013] Furthermore, the outer periphery of the slide cylinder is provided with several sliding grooves, and the upper end face of the slide block is provided with a limiting cylinder. The limiting cylinder is placed between the slide block and the partition and is movably sleeved on the drainage rope. The outer diameter of the limiting cylinder is larger than the center hole of the partition. When the drainage rope moves up to make the upper end of the limiting cylinder abut against the lower end face of the partition, the drainage plate can rotate in the water tank to engage with the buckle.

[0014] Furthermore, as the drainage rope moves downward, the two ends of the support rod are rotatably connected to the drainage plate and the slide block, respectively, and the maximum moving distance of the drainage rope is the sum of the lengths of the drainage plate and the support rod.

[0015] Furthermore, a waterproof membrane is provided at the connection point between the two photovoltaic panels, and the waterproof membrane is fixedly connected to either photovoltaic panel.

[0016] Furthermore, a pulley is provided on the side of the photovoltaic panel, and the drainage rope is always in contact with the pulley.

[0017] Furthermore, the bottom of the drainage cylinder is connected to a water storage tank via a pipe.

[0018] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0019] 1. This invention achieves automatic drainage by setting up a drainage cylinder and drainage components. Specifically, automatic drainage and reset are achieved through the drainage rope and reset rope on the drainage rod. It can effectively collect and discharge water on the surface of the photovoltaic panel at different angles, avoiding damage to the photovoltaic panel caused by water accumulation. It successfully removes water droplets attached to the inside of the photovoltaic panel while performing large-volume drainage.

[0020] 2. This invention can effectively collect and drain water from the surface of photovoltaic panels from different angles, avoiding damage to the photovoltaic panels caused by water accumulation. It has an automatic reset function, which can ensure that the device can automatically return to the initial state after drainage is completed, ready for the next drainage. While solving the drainage problem, the design of the drainage device should not affect the heat dissipation capacity of the photovoltaic panels, so as to ensure the working efficiency of the photovoltaic panels.

[0021] 3. The sealing component in this invention improves the sealing performance between photovoltaic panels, effectively preventing the intrusion of contaminants such as moisture and dust, protecting the internal structure of the photovoltaic panels, and extending the service life of the photovoltaic panels. Secondly, the design of the sealing component allows the photovoltaic panels to rotate as necessary while maintaining a seal, which not only improves the adaptability of the photovoltaic panels but also ensures the flexibility and reliability of the photovoltaic system. In addition, the setting of the plastic layer and the buffer layer provides good elasticity and cushioning, which can adapt to the small displacement and thermal expansion between the photovoltaic panels, ensuring the long-term stability of the sealing performance. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and constitute a part of this invention, are not intended to limit the scope of the invention. In the drawings:

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the photovoltaic panel of the present invention;

[0025] Figure 3 This is a schematic diagram of the drainage component of the present invention;

[0026] Figure 4 This is a bottom view of the drainage component of the present invention.

[0027] Figure 5 This is a schematic diagram of the internal structure of the drainage component of the present invention;

[0028] Figure 6 This is an axial view of the internal structure of the drainage component of the present invention;

[0029] Figure 7 This is a partial cross-sectional structural diagram of the sealing assembly of the present invention;

[0030] Figure 8 This is a schematic diagram of the connection structure between the carriage and the slide rail of the present invention.

[0031] The attached diagram shows the markings and corresponding component names:

[0032] 1-Photovoltaic panel, 2-Slide frame, 3-Slide rail, 4-Drainage device, 5-Motor, 6-Waterproof membrane, 7-Pulley, 8-Sealing assembly;

[0033] 41-Drainage cylinder, 42-Drainage assembly, 43-Drainage rod, 44-Drainage rope, 45-Reset rope, 46-Torsion spring, 47-Baffle plate;

[0034] 421-Slide cylinder, 422-Slide seat, 423-Support rod, 424-Drainage plate, 425-Snap fastener, 426-Slide groove, 427-Limiting cylinder;

[0035] 471-Sink;

[0036] 81-Snap-on panel, 82-Hinge panel, 83-Hinge shaft, 84-Plastic layer, 85-Buffer layer. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments and accompanying drawings. The illustrative embodiments and descriptions of this invention are for illustrative purposes only and are not intended to limit the invention. It should be noted that this invention is already in the actual research and development stage.

[0038] Example 1:

[0039] Please refer to the attached document as well. Figures 1 to 8As shown, a drainage device for a photovoltaic panel is disclosed. The photovoltaic panel includes several sets of photovoltaic panels 1 that can rotate relative to each other. The two ends of the photovoltaic panels 1 are rotatably connected to a slide 2. The slide 2 is slidably mounted on a slide rail 3 and its position is adjusted by a motor 5. The drainage device 4 is fixedly mounted on the slide 2 and positioned below the outer corner of the photovoltaic panel 1. When the angle between two photovoltaic panels 1 is less than 180°, water can flow down along the photovoltaic panel 1 into the drainage device 4. The drainage device 4 includes a drainage cylinder 41 and a drainage component 42. The drainage component 42 is slidably mounted in the drainage cylinder 41. A drainage rod 43 is slidably mounted on the lower end face of the photovoltaic panel 1. A drainage rope 44 is bolted around the drainage rod 43. A reset rope 45 is also spirally wound around the drainage rod 43. The winding direction of the reset rope 45 is opposite to that of the drainage rope 44. A torsion spring 46 for reset is connected to the free end of the reset rope 45. The torsion spring 46 is fixedly mounted on the lower end face of the photovoltaic panel 1.

[0040] A partition 47 is provided inside the drainage cylinder 41, and a plurality of water troughs 471 are provided on the partition 47. The drainage assembly 42 includes a slide cylinder 421 disposed below the partition 47. A slide block 422 is slidably disposed inside the slide cylinder 421. A support rod 423 is rotatably disposed on the outer periphery of the slide block 422. A drainage plate 424 is rotatably connected to the free end of the support rod 423. The end of the drainage plate 424 is rotatably disposed on the side of the water trough 471 near the slide cylinder 421. The slide block 422 is fixedly connected to the drainage rope 44. The water trough 471 is far from the slide cylinder 421. A buckle 425 is also provided on one side away from the slide cylinder 421. In the initial state, the torsion spring 46 exerts a tension force on the drainage rope 44, causing the drainage plate 424 to be engaged with the buckle 425 and sealing the water tank 471. When the water pressure accumulated in the drainage cylinder 41 is greater than the tension of the drainage rope 44, the buckle 425 is released under pressure, causing the drainage plate 424 to rotate downward and enter the drainage state. When the water pressure in the drainage cylinder 41 is less than the tension of the drainage rope 44, the reset rope 45 moves upward through the torsion spring 46, causing the drainage plate 424 to be engaged in the buckle 425 and return to the initial state.

[0041] As attached Figure 1As shown, the photovoltaic panel 1 is rotatably connected to the slide 2 via a fixed hinge support. Rollers are provided at both ends of the slide 2 and cooperate with the slide rail 3. The motor 5 is fixedly mounted on the slide 2. In this embodiment, the preferred number of motors 5 is 2, which are respectively located at both ends of the slide 2. The output end of the motor 5 is connected to a gear via a belt drive. A toothed belt is fixedly mounted on the slide rail 3. The gear is mounted on the slide 2 and cooperates with the toothed belt. When the motor 5 is started under control, the slide 2 moves on the slide rail 3 by changing the distance between the gear and the toothed belt. More specifically, in this embodiment, the number of slides 2 is preferably 3, and the number of corresponding photovoltaic panels is two sets, which are rotatably mounted on the slides 2 with the same structure. When one side motor 5 is off, due to the meshing relationship between the gear and the toothed belt, the corresponding slide 2 and the slide rail 3 remain relatively fixed. When the other side motor is started, if the slide 2 moves away from the fixed motor 5, the angle of the photovoltaic panels 1 between the two sets of photovoltaic panels will increase. When the displacement reaches the limit position, the two sets of photovoltaic panels will be a single plane. If the slide 2 moves closer to the fixed motor 5, the angle of the photovoltaic panels 1 between the two sets of photovoltaic panels will decrease. When the displacement reaches the limit position, the two sets of photovoltaic panels will approach verticality. It can be understood that the motors 5 on both sides can control the movement simultaneously, that is, the slides 2 at both ends can act as the driving element, and the slide 2 at the middle position of both ends can act as the driven element, ultimately realizing the angle adjustment between the two sets of photovoltaic panels. The drainage process of the drainage device 4 is a cyclic switching process between the initial state and the drainage state. During the switching process from the initial state to the drainage state, the drainage rod 43 moves downward spirally below the photovoltaic panel 1, causing the water pressure on the lower end of the photovoltaic panel 1 to dissipate. During the switching process from the drainage state to the initial state, the drainage rod 43 moves upward spirally below the photovoltaic panel 1, causing the water pressure on the lower end of the photovoltaic panel 1 to dissipate.

[0042] For the above structure, the working principle of the drainage device 4 is to achieve automatic drainage and resetting through a sophisticated mechanical structure. The drainage cylinder 41 is fixed on the slide 2, located below the outer corner of the photovoltaic panel 1, and is used to collect water flowing down along the photovoltaic panel 1. The drainage cylinder 41 has a partition 47 inside, with several water troughs 471 on the partition 47 for temporary storage of rainwater, awaiting drainage. A drainage rod 43 is slidably mounted on the lower end face of the photovoltaic panel 1, with a drainage rope 44 wound around it. The drainage rope 44 connects the slide 422 and the drainage plate 424, and its function is to pull the drainage plate 424 under the pressure of the water flow, thus opening and closing the drainage plate 424. A resetting rope 45 is also spirally wound around the drainage rod 43, with the winding direction of the resetting rope 45 opposite to that of the drainage rope 44, and its free end is connected to a torsion spring 46. In the initial state, the torsion spring 46 applies tension to the drainage rope 44, keeping the drainage plate 424 engaged with the buckle 425, sealing the water tank 471, and preventing water from flowing out. When the water pressure accumulated in the drainage cylinder 41 exceeds the tension of the drainage rope 44, the drainage rope 44 is stretched, causing the drainage plate 424 to overcome the tension of the torsion spring 46, release from the buckle 425, and enter the drainage state, allowing water to flow out. When the water pressure decreases, the tension of the torsion spring 46 causes the drainage rope 44 to contract, and the reset rope 45 moves upward through the torsion spring 46, causing the drainage plate 424 to engage back with the buckle 425, returning to the initial state, completing the drainage process.

[0043] In the initial state of drainage, the torsion spring 46 exerts a tension force on the drainage rope 44, causing the drainage plate 424 to engage with the buckle 425 and seal the water tank 471. When the water pressure accumulated in the drainage cylinder 41 exceeds the tension of the drainage rope 44, the buckle 425 is released under pressure, causing the drainage plate 424 to rotate downwards and enter the drainage state. When the water pressure in the drainage cylinder 41 is less than the tension of the drainage rope 44, the reset rope 45 moves upwards via the torsion spring 46, causing the drainage plate 424 to engage with the buckle 425 and return to the initial state. This design allows the drainage device 4 to automatically open for drainage when the water pressure exceeds the tension of the torsion spring 46 and automatically reset when the water pressure decreases, thus achieving automatic drainage and backflow prevention functions. By winding the drainage rope 44 and the reset rope 45 in opposite directions, the drainage rod 43 is rotated in the opposite direction on the photovoltaic panel 1. Compared with rotation in the same direction, the reverse rotation can better utilize centrifugal force to throw the water off the drainage rod 43, thus improving drainage efficiency. The addition of the torsion spring 46 provides an automatic reset mechanism, which can realize the automatic reset of the drainage plate 424 without external energy, reducing maintenance costs and operational complexity.

[0044] It should be noted that with the widespread application of photovoltaic power generation technology, the modular design and on-site assembly method of photovoltaic panel 1 make drainage treatment particularly important. Traditional photovoltaic modules rely mainly on applying adhesive, using interlocking strips, or welding for waterproofing. While these methods are effective in the short term, they carry the risk of cracking and leakage in the long run. Furthermore, as the sealing performance of photovoltaic panels increases, their heat dissipation capacity often decreases. Rainwater and other liquids, once penetrating the photovoltaic panel, are difficult to remove through natural evaporation, which not only affects the performance of photovoltaic panel 1 but may also shorten its lifespan.

[0045] To address the aforementioned issues, the applicant proposed a drainage device for photovoltaic panels. Firstly, using a matching slide 2 and slide rail 3, and adjusted by a motor 5, the device adapts to drainage needs at different angles. It is understood that the smaller the angle between the two photovoltaic panels 1, the greater the water flow. Furthermore, due to surface tension, water will adhere to and penetrate into the interior of the photovoltaic panels 1, especially exacerbated by the pressure of the flowing water during heavy rainfall. Therefore, automatic drainage is achieved by setting a drainage cylinder 41 and a drainage assembly 42, specifically through a drainage rope 44 and a reset rope 45 on the drainage rod 43. More specifically, a baffle 47 is installed inside the drainage cylinder 41. Due to the cyclical rotation of the drainage plate 424, the water volume within the drainage cylinder 41 also undergoes a reciprocating cycle. This reciprocating cycle directly... This is manifested as a water storage and release process within the drainage cylinder 41, which serves as the power source for the automatic drainage of the drainage rod 43. Unlike existing technologies, if external power is used for drainage of the photovoltaic panel 1, it is difficult to avoid mechanical vibration of the photovoltaic panel 1 itself. In this environment, mechanical vibration will inevitably lead to more severe water jetting or accelerated seepage. Therefore, it is necessary to maintain relative stability during drainage. Based on the above structure, the structure in this embodiment can effectively collect and discharge the water accumulated on the surface of the photovoltaic panel 1 at different angles, avoiding damage to the photovoltaic panel 1. It has an automatic reset function, which can ensure that the device can automatically return to the initial state after drainage is completed, ready for the next drainage. While solving the drainage problem, the design of the drainage device 4 should not affect the heat dissipation capacity of the photovoltaic panel 1 to ensure the working efficiency of the photovoltaic panel 1.

[0046] Example 2:

[0047] This embodiment only describes the parts that differ from Embodiment 1. Specifically, a sealing assembly 8 is provided between the two rotatably mounted photovoltaic panels 1. The sealing assembly 8 includes a snap plate 81 disposed on the outer periphery of the photovoltaic panel 1. A hinge plate 82 is fixedly connected to the end of the snap plate 81. The hinge plate 82 between the two photovoltaic panels 1 is rotatably disposed through a hinge shaft 83. A plastic layer 84 is provided on the side of the hinge plate 82 away from the hinge shaft 83. A buffer layer 85 is provided on one side of the plastic layer 84, and the buffer layer 85 abuts against the photovoltaic panel 1. There is a gap between the photovoltaic panel 1 and the snap plate 81, and the drainage rod 43 is disposed within the gap.

[0048] In existing photovoltaic (PV) panel designs, the PV panels 1 need to rotate relative to each other to adapt to different angles of sunlight. This rotational connection often leads to a decrease in sealing performance. Especially under harsh weather conditions, such as rain, poor sealing can cause moisture and dust to intrude. This not only affects the power generation efficiency of the PV panels 1 but may also lead to problems such as short circuits and corrosion. In severe cases, it can even cause the entire PV system to fail. Therefore, improving the sealing performance between PV panels is one of the key technical issues to ensure the stable operation of PV systems.

[0049] In this embodiment, a sealing assembly 8 is provided between two rotatably mounted photovoltaic panels 1. Specifically, it includes a snap-on plate 81 disposed on the outer periphery of the photovoltaic panel 1. A hinge plate 82 is fixedly connected to the end of the snap-on plate 81. The hinge plate 82 between the two photovoltaic panels 1 is rotatably mounted via a hinge shaft 83. A plastic layer 84 is provided on the side of the hinge plate 82 away from the hinge shaft 83, and a buffer layer 85 is provided on the side of the plastic layer 84. The buffer layer 85 abuts against the photovoltaic panel 1, and a gap exists between the photovoltaic panel 1 and the snap-on plate 81. A drainage rod 43 is disposed within this gap. This structure allows the photovoltaic panel 1 to remain sealed during rotation while allowing necessary drainage. The plastic layer 84 and the buffer layer 85 provide sufficient elasticity and cushioning to accommodate minor displacements and thermal expansion between the photovoltaic panels 1, ensuring that the sealing performance is not affected by the rotation of the photovoltaic panel 1. Furthermore, the material selection and design of the plastic layer 84 and the buffer layer 85 also consider weather resistance and chemical resistance to resist the influence of the external environment.

[0050] The above structure improves the sealing performance between photovoltaic panels, effectively preventing the intrusion of contaminants such as moisture and dust, protecting the internal structure of photovoltaic panel 1, and extending the service life of photovoltaic panel 1. Secondly, the design of the sealing component 8 allows photovoltaic panel 1 to rotate as necessary while maintaining a seal, which not only improves the adaptability of photovoltaic panel 1 but also ensures the flexibility and reliability of the photovoltaic system. In addition, the setting of plastic layer 84 and buffer layer 85 provides good elasticity and buffering, which can adapt to the small displacement and thermal expansion between photovoltaic panels 1, ensuring the long-term stability of sealing performance.

[0051] Example 3:

[0052] This embodiment only describes the parts that differ from Embodiment 1. Specifically, the buckle 425 is rotatably mounted on the water tank 471 and reset by a spring. The lower end face of the buckle 425 has rounded corners, and the surface of the buckle 425 that contacts the lower end face of the drainage plate 424 is flat. The outer periphery of the slide cylinder 421 is provided with several sliding grooves 426. The upper end face of the slide block 422 is provided with a limiting cylinder 427. The limiting cylinder 427 is placed between the slide block 422 and the partition plate 47 and is movably sleeved on the drainage rope 44. The outer diameter of the limiting cylinder 427 is larger than the center hole of the partition plate 47. When the drainage rope 44 moves upward to make the upper end of the limiting cylinder 427 abut against the lower end face of the partition plate 47, the drainage plate 424 can rotate within the water tank 471 to engage with the buckle 425.

[0053] In this embodiment, a preferred arrangement is that when the drainage rope 44 moves downward, both ends of the support rod 423 are rotatably connected to the drainage plate 424 and the slide block 422, respectively. The maximum moving distance of the drainage rope 44 is the sum of the lengths of the drainage plate 424 and the support rod 423. This design allows the drainage rope 44 to move within a wider range, thus enabling more effective pulling of the drainage plate 424 when needed, achieving more efficient drainage. The connection method between the support rod 423 and the drainage plate 424 ensures that the drainage plate 424 can stably respond to changes in water pressure when the drainage rope 44 moves, thereby achieving precise drainage control.

[0054] In this embodiment, a preferred embodiment includes a waterproof plate 6 at the connection point between the two photovoltaic panels 1, and the waterproof plate 6 is fixedly connected to either photovoltaic panel 1. This design, by adding the waterproof plate 6 to the connection point of the photovoltaic panels 1, forms an additional waterproof layer, effectively preventing moisture from intruding from the connection point. The fixed connection of the waterproof plate 6 ensures that it remains stably in place when the photovoltaic panel 1 rotates or is subjected to external force, thereby improving the waterproofing effect.

[0055] In this embodiment, it is preferred that the photovoltaic panel 1 is provided with a pulley 7 on its side, and the drainage rope 44 is always in contact with the pulley 7.

[0056] It should be noted that in the existing technology, the fixing and releasing of the drainage board 424 may not be stable enough, leading to reduced drainage efficiency or failure under high water pressure or extreme weather conditions. Therefore, it is necessary to ensure that the drainage board 424 can be stably fixed in the drainage position when needed, and can reliably reset after drainage. The lower end face of the latch 425 is designed with rounded corners, and the contact surface with the lower end face of the drainage board 424 is flat. This design allows the latch 425 to be stably held in the initial position under the action of the spring, that is, the drainage board 424 is engaged with the latch 425 and seals the water tank 471. When the water flow pressure is greater than the tension of the drainage rope 44, the drainage board 424 rotates downward, the latch 425 is released under pressure, and water is allowed to flow through the drainage board 424 and drain. After drainage, the spring force causes the latch 425 to reset, and the drainage board 424 returns to the initial position, sealing the water tank 471. This design not only improves the reliability of fixing and releasing the drain plate 424, but also reduces maintenance requirements and operating costs by reducing friction between the clip 425 and the drain plate 424.

[0057] Several grooves 426 are formed on the outer periphery of the slide cylinder 421, and a limiting cylinder 427 is provided on the upper end face of the slide block 422. The limiting cylinder 427 is placed between the slide block 422 and the partition plate 47, and is movably sleeved on the drainage rope 44, with its outer diameter being larger than the center hole of the partition plate 47. When the drainage rope 44 moves upward to make the upper end of the limiting cylinder 427 abut against the lower end face of the partition plate 47, the drainage plate 424 can rotate within the water tank 471 to engage with the buckle 425. This design ensures the stability of the drainage rope 44 during movement, and through the precise control of the limiting cylinder 427, the precise positioning of the drainage plate 424 is achieved. When the drainage rope 44 moves upward or downward, the interaction between the limiting cylinder 427 and the partition plate 47 ensures the stable rotation of the drainage plate 424, thereby improving drainage efficiency and the response speed of the device.

[0058] Example 4:

[0059] This embodiment only describes the parts that differ from Embodiment 1. Specifically, the bottom of the drainage cylinder 41 is connected to a water storage tank via a pipe. In existing photovoltaic panel drainage systems, rainwater is usually discharged directly onto the ground, which not only wastes precious water resources but may also cause ground erosion and soil loss. Especially in arid or semi-arid regions, the collection and utilization of rainwater is particularly important.

[0060] As the main component for rainwater harvesting, the drainage pipe 41 has a bottom pipe that connects directly to the storage tank, ensuring that rainwater can be smoothly discharged from the photovoltaic panel 1 and transferred to the storage tank. The design of the storage tank needs to take into account factors such as capacity, material durability, and leak-proofing to ensure that the collected rainwater can be stored safely and effectively. In addition, the baffle 47 can also serve as a filtration system to remove impurities and contaminants from the rainwater, improving water quality and making it suitable for irrigation, washing, or other non-potable uses.

[0061] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A drainage device for a photovoltaic power generation panel, the photovoltaic power generation panel comprising a plurality of photovoltaic panels (1) capable of rotating relative to each other, wherein both ends of the photovoltaic panels (1) are rotatably connected to a slide (2), the slide (2) being slidably mounted on a slide rail (3) and its position adjusted by a motor (5), characterized in that: The drainage device (4) is fixedly installed on the slide (2) and placed below the outer corner of the photovoltaic panel (1). When the angle between the two photovoltaic panels (1) is less than 180°, the water can flow down along the photovoltaic panel (1) into the drainage device (4). The drainage device (4) includes a drainage cylinder (41) and a drainage component (42). The drainage component (42) is slidably installed in the drainage cylinder (41). A drainage rod (43) is slidably installed on the lower end face of the photovoltaic panel (1). A drainage rope (44) is spirally wound on the drainage rod (43). A reset rope (45) is also spirally wound on the drainage rod (43). The winding direction of the reset rope (45) is opposite to that of the drainage rope (44). A torsion spring (46) for reset is connected to the free end of the reset rope (45). The torsion spring (46) is fixedly installed on the lower end face of the photovoltaic panel (1). The drainage cylinder (41) is provided with a partition (47), and a plurality of water troughs (471) are provided on the partition (47). The drainage assembly (42) includes a slide cylinder (421) disposed below the partition (47). A slide seat (422) is slidably disposed inside the slide cylinder (421). A support rod (423) is rotatably disposed on the outer periphery of the slide seat (422). A drainage plate (424) is rotatably connected to the free end of the support rod (423). The end of the drainage plate (424) is rotatably disposed on the side of the water trough (471) near the slide cylinder (421). The slide seat (422) is fixedly connected to the drainage rope (44). The water troughs (471) are... On the side away from the slide cylinder (421), there is also a buckle (425). In the initial state, the torsion spring (46) exerts a pulling force on the drainage rope (44), causing the drainage plate (424) to be engaged in the buckle (425) and block the water tank (471). When the water pressure accumulated in the drainage cylinder (41) is greater than the pulling force of the drainage rope (44), the buckle (425) is released under pressure and the drainage plate (424) rotates downward to enter the drainage state. When the water pressure in the drainage cylinder (41) is less than the pulling force of the drainage rope (44), the reset rope (45) moves upward through the torsion spring (46) to make the drainage plate (424) be engaged in the buckle (425) and enter the initial state. The drainage process of the drainage device (4) is a cyclic switching process between the initial state and the drainage state. During the switching process from the initial state to the drainage state, the drainage rod (43) moves downward spirally below the photovoltaic panel (1) to release the water flow that is pressed against the lower end of the photovoltaic panel (1). During the switching process from the drainage state to the initial state, the drainage rod (43) moves upward spirally below the photovoltaic panel (1) to release the water flow that is pressed against the lower end of the photovoltaic panel (1).

2. The drainage device for photovoltaic panels according to claim 1, characterized in that: A sealing assembly (8) is provided between the two photovoltaic panels (1) that are rotatably mounted.

3. A drainage device for photovoltaic panels according to claim 2, characterized in that: The sealing assembly (8) includes a buckle plate (81) disposed on the outer periphery of the photovoltaic panel (1). A hinge plate (82) is fixedly connected to the end of the buckle plate (81). The hinge plate (82) between the two photovoltaic panels (1) is rotatably disposed through a hinge shaft (83). A plastic layer (84) is disposed on the side of the hinge plate (82) away from the hinge shaft (83). A buffer layer (85) is disposed on one side of the plastic layer (84), and the buffer layer (85) abuts against the photovoltaic panel (1). There is a gap between the photovoltaic panel (1) and the buckle plate (81), and the drain rod (43) is disposed in the gap.

4. A drainage device for photovoltaic panels according to claim 1, characterized in that: The buckle (425) is rotatably mounted on the water tank (471) and reset by a spring. The lower end face of the buckle (425) is rounded. The surface of the buckle (425) that contacts the lower end face of the drain plate (424) is a plane.

5. A drainage device for photovoltaic panels according to claim 4, characterized in that: The outer periphery of the slide cylinder (421) is provided with several sliding grooves (426), and the upper end face of the slide block (422) is provided with a limiting cylinder (427). The limiting cylinder (427) is placed between the slide block (422) and the partition plate (47) and is movably sleeved on the drainage rope (44). The outer diameter of the limiting cylinder (427) is larger than the center hole of the partition plate (47). When the drainage rope (44) moves up to make the upper end of the limiting cylinder (427) abut against the lower end face of the partition plate (47), the drainage plate (424) can rotate in the water tank (471) to engage with the buckle (425).

6. A drainage device for photovoltaic panels according to claim 1, characterized in that: When the drainage rope (44) moves down, the two ends of the support rod (423) are rotatably connected to the drainage plate (424) and the slide (422) respectively. The maximum moving distance of the drainage rope (44) is the sum of the lengths of the drainage plate (424) and the support rod (423).

7. A drainage device for photovoltaic panels according to claim 6, characterized in that: A waterproof plate (6) is provided at the connection part of the two photovoltaic panels (1), and the waterproof plate (6) is fixedly connected to either photovoltaic panel (1).

8. A drainage device for photovoltaic panels according to claim 6, characterized in that: The photovoltaic panel (1) is provided with a pulley (7) on its side, and the drainage rope (44) is always in contact with the pulley (7).

9. A drainage device for photovoltaic panels according to claim 7 or 8, characterized in that: The bottom of the drainage cylinder (41) is connected to a water storage tank via a pipe.

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