A roof rainwater collection and reuse device

Abstract

The application provides a roof rainwater collecting and recycling device, which comprises a mounting plate mounted at a roof drainage position, a rainwater collecting tank, a sedimentation filter pipe, a filter tank and a rainwater collecting barrel which are sequentially communicated and arranged on the mounting plate, the rainwater collecting tank is provided with a first filter inclined plate for filtering sundries in rainwater, the sedimentation filter pipe is provided with a second filter inclined plate for filtering the sundries again, after the particles pass through the second filter inclined plate and are settled, the purified rainwater enters the filter tank, the filter tank is provided with two groups of filter screen plates and a self-cleaning mechanism, in this embodiment, the two groups of filter screen plates can alternately rotate to filter rainwater below the water inlet of the filter tank, and the other side is cleaned through the self-cleaning mechanism, and the whole process does not need to stop, and is efficient and thorough.

Description

Technical Field

[0001] This invention relates to the field of water resource recycling technology, and in particular to a rooftop rainwater collection and reuse device. Background Technology

[0002] In today's society, water scarcity and water pollution are becoming increasingly serious problems. Rainwater, as a precious water resource, is of great significance for alleviating water resource pressure and achieving sustainable development. Especially in urban environments, rooftops, as natural platforms for rainwater harvesting, have the advantages of large collection area and relatively good rainwater quality. Developing efficient rooftop rainwater harvesting and reuse devices has become one of the effective ways to solve water resource problems.

[0003] However, existing rooftop rainwater harvesting and reuse technologies still have some shortcomings. Existing filtration systems are not sophisticated enough, mostly employing only a single filtration method, which is insufficient to effectively intercept debris of different particle sizes, resulting in poor-quality collected rainwater and affecting subsequent reuse. For example, some devices only have simple filter screens, which can intercept larger debris such as leaves and branches, but have limited filtering effect on smaller particles and silt. Furthermore, the filter screens are prone to clogging, requiring frequent manual cleaning, which not only increases maintenance costs but also reduces the operating efficiency of the device. Summary of the Invention

[0004] The summary section of this invention provides a brief overview of the concepts, which will be described in detail in the detailed description section that follows. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0005] Some embodiments of the present invention provide a roof rainwater harvesting and reuse device to solve the technical problems mentioned in the background section above.

[0006] Some embodiments of the present invention provide a roof rainwater harvesting and reuse device, including an installation plate installed to a roof drainage point, a rainwater collection box disposed on the installation plate and connected in sequence, a settling filter pipe, a filter box, and a rainwater collection bucket connected to the filter box, wherein, The rainwater collection box is equipped with a first filter inclined plate for filtering impurities in the rainwater; The settling filter pipe is equipped with a second filter inclined plate for further filtration of impurities; after the particles settle through the second filter inclined plate, the purified rainwater enters the filter box. The filter box is equipped with two sets of filter screens and a self-cleaning mechanism. The two sets of filter screens can rotate alternately to the bottom of the filter box inlet to filter rainwater. The self-cleaning mechanism is used to clean the filter screens that are away from the filter box inlet.

[0007] Optionally, an installation tube is rotatably provided inside the filter box, and two sets of filter screens are fixed to both sides of the installation tube; The bottom of the filter box is provided with a first driving mechanism, including a first telescopic driving member arranged laterally to the bottom of the filter box, a meshing transmission rack and a transmission gear, one side of the transmission rack being connected to the output end of the first telescopic driving member, and the transmission gear being sleeved on the mounting tube.

[0008] Optionally, the self-cleaning mechanism includes a water supply mechanism, a second drive mechanism, and a cleaning pipe; The water supply mechanism includes a first connecting pipe that is connected to the top of the installation pipe in the middle. The first connecting pipe is provided with a first solenoid valve at both ends and two transmission pipes that are rotatably connected below. The transmission pipes are rotatably connected to the filter screen plate. Each transmission pipe is connected to multiple cleaning pipes. The second driving mechanism is used to drive the transmission pipes so that the multiple cleaning pipes rotate. The water supply mechanism also includes a second connecting pipe connected to the installation pipe and the rainwater collection tank, for supplying water to the installation pipe, the first connecting pipe, the transmission pipe and the cleaning pipe via a water pump.

[0009] Optionally, the second drive mechanism is used to drive the transmission pipe away from the filter box inlet to rotate, and includes a rotation drive member, the output end of which rotatably passes through the filter box and is coaxial with a transmission pipe, wherein... An electromagnet block is fixed at the output end of the rotation drive component, a connecting block is fixed at the bottom end of each transmission tube, a transmission column is slidably connected to the connecting block, a connecting iron block is fixedly connected to the bottom end of the transmission column, and a spring is sleeved between the transmission column and the connecting block. After the electromagnet block and the connecting iron block are attracted to each other, the rotating drive component drives the transmission tube to rotate.

[0010] Optionally, the cleaning pipe is provided with multiple cleaning nozzles.

[0011] Optionally, a water-separating plate is fixed at the bottom of the filter box, and the water-separating plate is sleeved onto the mounting pipe; The filter box is also equipped with a drain pipe.

[0012] Optionally, the device further includes a water storage tank, which is connected to a sedimentation filter pipe and a filter box via a first drain pipe and a second drain pipe; An installation column is fixed inside the water storage tank, and a float is slidably connected to the installation column to detect the water level in the water storage tank. The second drain pipe is equipped with a second solenoid valve and a transmission box. A transmission shaft is rotatably connected inside the transmission box. A blade is fixed on the transmission shaft. The transmission shaft extends out of the transmission box and is connected to the generator. In response to the float detecting that the water level in the storage tank exceeds the preset water level, the second solenoid valve opens, causing the generator to generate electricity.

[0013] Optionally, the mounting column is provided with a trigger switch electrically connected to the second solenoid valve at a position corresponding to the preset water level. When the float contacts the trigger switch, the second solenoid valve opens.

[0014] Optionally, a second telescopic drive is provided on the first filter inclined plate to drive the cleaning plate to push the debris out of the rainwater collection box.

[0015] Optionally, a plurality of inwardly inclined baffles are fixedly installed inside the sedimentation filter tube to prevent the settled particles from surging upward.

[0016] The above embodiments of the present invention have the following beneficial effects: This rooftop rainwater harvesting and reuse system features multi-stage filtration and automatic cleaning functions, significantly improving the quality of rainwater harvesting and the stability of system operation. The first filter plate effectively intercepts larger debris. The settling filter pipe, in conjunction with the second filter plate, further filters debris, while particles settling through the second filter plate can further filter rainwater particles.

[0017] The filter box features two sets of filter screens with a clever design; while one side is filtering, the other side can be automatically cleaned. The entire process requires no downtime, is highly efficient and thorough, and ensures that the filter screens maintain excellent filtration performance, resulting in higher quality collected rainwater. This provides a reliable guarantee for subsequent reuse and greatly improves the device's effectiveness and operational efficiency. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a structure of an embodiment of the roof rainwater harvesting and reuse device of the present invention; Figure 2 This is a schematic diagram of another embodiment of the roof rainwater harvesting and reuse device of the present invention; Figure 3 This is a cross-sectional view of an embodiment of the roof rainwater harvesting and reuse device of the present invention; Figure 4 for Figure 2 Enlarged view of point A in the middle; Figure 5 for Figure 3 Enlarged view at point B in the middle; Figure 6 for Figure 3 Enlarged view of point C in the middle.

[0020] Explanation of reference numerals in the attached figures: 1. Mounting plate; 2. Collection box; 3. First filter inclined plate; 4. Settling filter pipe; 5. Second filter inclined plate; 6. First drain pipe; 7. Water storage tank; 8. Second drain pipe; 9. Filter box; 10. Rainwater collection bucket; 11. Filter screen; 12. Partition; 21. Mounting pipe; 22. Mounting rod; 23. Transmission pipe; 24. Cleaning pipe; 25. Cleaning nozzle; 26. Water baffle plate; 27. Sewage pipe; 31. First connecting pipe; 32. Second connecting pipe; 33. Water pump; 4. First solenoid valve; 41. First telescopic drive component; 42. Transmission rack; 43. Transmission gear; 51. Rotation drive component; 52. Mounting shaft; 53. Electromagnetic block; 54. Connecting block; 55. Transmission column; 56. Connecting iron block; 57. Spring; 61. Second solenoid valve; 62. Mounting column; 63. Float; 64. Trigger switch; 65. Transmission box; 66. Transmission shaft; 67. Blade; 68. Generator; 71. Second telescopic drive component; 72. Cleaning plate. Detailed Implementation

[0021] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] like Figures 1 to 6 As shown, the roof rainwater harvesting and reuse device of the present invention includes an installation plate 1, a rainwater collection box 2, a sedimentation filter pipe 3, a water storage tank 7, a filter box 9, and a rainwater collection bucket 10 that is connected to the filter box 9 and can be placed on the ground.

[0026] A rainwater collection tank 2 is fixedly connected to the mounting plate 1, and a first filter inclined plate 3 is fixedly connected inside the rainwater collection tank 2. A settling filter pipe 4, fixedly connected to the mounting plate 1, is provided below the rainwater collection tank 2, allowing rainwater filtered by the rainwater collection tank 2 to flow into the settling filter pipe 4. A second filter inclined plate 5 is fixedly connected to the top of the settling filter pipe 4, and a first drain pipe 6 is fixedly connected below the second filter inclined plate 5. The first drain pipe 6 is also fixedly connected to a water storage tank 7, and a second drain pipe 8 is fixedly connected to the bottom of the water storage tank 7. A filter box 9 is fixedly connected to the bottom of the second drain pipe 8, and multiple rainwater collection buckets 10 are fixedly connected to the bottom of the filter box 9 via pipes.

[0027] A second telescopic drive component 71 is fixedly connected to the rainwater collection box 2. The second telescopic drive component 71 is an electric telescopic rod. The output end of the second telescopic drive component 71 is provided with a cleaning plate 72 for pushing debris out of the rainwater collection box 2.

[0028] By installing the mounting plate 1 at the roof drainage point and fixing the rainwater collection tank 10 to the ground, rainwater is collected through the rainwater collection box 2. The rainwater enters the first filter inclined plate 3 inside the rainwater collection box 2, where larger debris is filtered. After filtering for a period of time, the second telescopic drive component 71 drives the cleaning plate 72 to move, and the cleaning plate 72 automatically cleans the debris filtered on the first filter inclined plate 3, preventing larger debris from clogging the filter plate and improving the stability of filtration.

[0029] The filtered water enters the second filter plate 5 at the top of the settling filter pipe 4, where smaller impurities are filtered out and fall off the second filter plate 5. The filtered rainwater enters the settling filter pipe 4, where larger particles such as soil settle downwards to the bottom of the settling filter pipe 4.

[0030] The sedimentation filter pipe 4 is fixedly connected with multiple inwardly inclined baffles 12. Due to the obstruction of the multiple baffles 12, the sedimented soil can be prevented from surging upward.

[0031] The water storage tank 7 is connected to the sedimentation filter pipe 3 and the filter box 9 through the first drain pipe 6 and the second drain pipe 8. The rainwater filtered by the sedimentation filter pipe 3 enters the water storage tank 7 through the first drain pipe 6, and then enters the filter box 9 through the second drain pipe 8. After being filtered again by the filter box 9, the rainwater enters the rainwater collection bucket 10 through the pipe for collection and reuse.

[0032] Please see Figures 2 to 6 As shown, the filter box 9 is equipped with two sets of filter screens 11 and a self-cleaning mechanism. The two sets of filter screens 11 can rotate alternately to the bottom of the filter box 9 to filter rainwater. The self-cleaning mechanism is used to clean the filter screens 11 that are away from the water inlet of the filter box 9.

[0033] Specifically, an installation tube 21 is rotatably installed inside the filter box 9, and an installation rod 22 is fixedly connected to the installation tube 21. Two sets of filter screens 11 are fixed to both sides of the installation tube via connecting rods and installation rods 22.

[0034] A first drive mechanism is provided at the bottom of the filter box 9, including a first telescopic drive member 41 horizontally disposed at the bottom of the filter box 9. The first telescopic drive member 41 can be an electric telescopic rod. The output end of the first telescopic drive member 41 is connected to a transmission rack 42, and one side of the transmission rack 42 is meshed with a transmission gear 43 that is fixedly sleeved with the mounting tube 21. The first telescopic drive member 41 drives the transmission rack 42 to move, and the transmission rack 42 drives the transmission gear 43 and the mounting tube 21 to rotate, so that the two sets of filter screens 11 can rotate alternately to the area below the inlet of the filter box 9 to filter rainwater.

[0035] The self-cleaning mechanism includes a water supply mechanism, a second drive mechanism, and a cleaning pipe.

[0036] The water supply mechanism includes a first connecting pipe 31 that communicates with the top of the installation pipe 21 in the middle, and a first solenoid valve 34 is provided at both ends of the first connecting pipe 31. Two transmission pipes 23 are rotatably connected to the lower ends of the first connecting pipe 31, and the transmission pipes 23 are rotatably connected to the filter screen plate 11. Multiple cleaning pipes 24 are connected to each transmission pipe 23, and multiple cleaning nozzles 25 are provided on each cleaning pipe 24.

[0037] The water supply mechanism also includes a second connecting pipe 32 connected to the installation pipe 21 and the rainwater collection tank 10, and a water pump 33 is installed on the second connecting pipe 32. During water supply, the water pump 33 supplies water to the second connecting pipe 32, and the second connecting pipe 32 supplies water to the first connecting pipe 31 through the installation pipe 21. Then, by opening the first solenoid valve 34 on the first connecting pipe 31, the first connecting pipe 31 supplies water to the transmission pipe 23, so that the cleaning nozzle 25 of the cleaning pipe 24 cleans the filter screen 11 that is away from the filter box 9.

[0038] The aforementioned second drive mechanism is used to drive the transmission pipe 23 that is away from the inlet of the filter box 9, i.e. Figure 3 The transmission tube 23 on the right side causes multiple cleaning tubes 24 to rotate.

[0039] The second drive mechanism includes a rotation drive component 51 disposed at the bottom of the filter box 9. The rotation drive component 51 is a servo motor, which is controlled by a PLC programming program to control the forward and reverse rotation and the rotation angle. The output end of the rotation drive component 51 is fixedly connected to a mounting shaft 52 that is rotatably connected to the bottom of the filter box 9, and an electromagnet block 53 is fixedly connected to the top end of the mounting shaft 52.

[0040] Each transmission tube 23 has a connecting block 54 fixedly connected to its bottom end, a transmission column 55 slidably connected to the connecting block 54, a connecting iron block 56 fixedly connected to the bottom end of the transmission column 55, and a spring 57 connected to the connecting block 54 sleeved on the outer surface of the transmission column 55.

[0041] When the electromagnet 53 is energized, it attracts the connecting iron block 56. The connecting iron block 56 moves downward and is attracted and fixed to the electromagnet 53. At this time, the spring 57 is compressed. Then, the rotating drive component 51 drives the mounting shaft 52 to rotate. The mounting shaft 52 drives the electromagnet 53 and the connecting iron block 56 to rotate. The connecting iron block 56 drives the transmission column 55, the connecting block 54 and the transmission tube 23 to rotate, so that the cleaning tube 24 rotates around the transmission tube 23, and the cleaning nozzle 25 thoroughly washes the filter screen 11 that has been removed from the working position.

[0042] Furthermore, a water-separating plate 26 is fixedly connected to the bottom of the filter box 9. The water-separating plate 26 is fitted onto the mounting pipe 21 to prevent cleaning particles from entering between the mounting pipe 21 and the filter box 9 and affecting the rotation of the mounting pipe 21. A drain pipe 27 is fixedly connected to the bottom of the filter box 9 for discharging wastewater after cleaning.

[0043] By opening the first solenoid valve 34 on the right side, the water supply mechanism supplies water to the first connecting pipe 31 on this side. The first connecting pipe 31 supplies water to the transmission pipe 23, and at the same time, the transmission pipe 23 supplies water to the cleaning nozzles 25 through the cleaning pipe 24. The water sprayed from the cleaning nozzles 25 washes the filter screen 11, washing away the dirt filtered on its surface. Simultaneously, the second drive mechanism drives the transmission pipe 23 to rotate, which in turn drives multiple cleaning pipes 24 to rotate, causing the cleaning nozzles 25 on the cleaning pipes 24 to thoroughly wash the filter screen 11, washing away the dirt filtered on its surface and ensuring that the filter screen 11 restores its good filtration performance. The washed-off wastewater is blocked by the baffle plate 26 and discharged from the drain pipe 27, realizing automatic cleaning of the filter screen 11 without stopping the machine, without the need for manual cleaning. At the same time, the entire cleaning process is efficient and thorough, and does not require machine shutdown, greatly improving the use effect and operating efficiency of the device.

[0044] A second solenoid valve 61 is installed on the second drain pipe 8. An installation column 62 is fixedly connected inside the water storage tank 7. A float 63 is slidably connected to the installation column 62 for detecting the water level in the water storage tank.

[0045] A transmission box 65 is installed on the second drainage pipe 8. A transmission shaft 66 is rotatably connected inside the transmission box 65. A blade 67 is fixedly connected to the outer surface of the transmission shaft 66. A generator 68 is fixedly connected to one end of the transmission shaft 66. The generator 68 is connected to the energy storage mechanism. The energy storage mechanism is existing technology, so it will not be described in detail.

[0046] When the float 63 detects that the water level in the water tank 7 exceeds the preset water level, the second solenoid valve 61 opens, causing the generator 68 to generate electricity.

[0047] Specifically, a trigger switch 64 is installed at the position corresponding to the preset water level on the mounting column 62, and is electrically connected to the second solenoid valve. When the filtered water enters the water storage tank 7 through the first drain pipe 6, the water level in the water storage tank 7 gradually rises, causing the float 63 to move upward. When the float 63 moves to the top, it triggers the trigger switch 64, reaching the preset water level.

[0048] At this time, the trigger switch 64 activates the second solenoid valve 61, opening the second drain pipe 8. Under water pressure, the water flows downwards at high speed, causing the blades 67 and drive shaft 66 inside the transmission box 65 to rotate. The drive shaft 66 then drives the generator 68 to rotate, generating electricity. The electricity generated by the generator 68 is then sent to the energy storage mechanism for storage, providing partial energy support for the operation of the device and realizing the recycling of energy. This rainwater power generation function not only reduces the operating cost of the device but also embodies the concept of green environmental protection, making a positive contribution to sustainable development.

[0049] Working principle of the invention: By installing the mounting plate 1 at the roof drain and fixing the rainwater collection tank 10 to the ground, rainwater is collected through the rainwater collection box 2. The rainwater enters the first filter inclined plate 3 inside the rainwater collection box 2, where larger debris is filtered. After a period of filtration, the second telescopic drive component 71 moves the cleaning plate 72, which automatically removes the debris filtered from the first filter inclined plate 3, preventing larger debris from clogging the filter plate and improving the stability of filtration. The filtered water enters the second filter inclined plate 5 at the top of the settling filter pipe 4, and then passes through the second... The filter inclined plate 5 filters out smaller debris, which falls off the second filter inclined plate 5. The filtered water then enters the sedimentation filter pipe 4, where larger soil particles sink to the bottom. Multiple baffles 12 prevent the settled soil from rising. The filtered water then enters the water storage tank 7 through the first drain pipe 6. The water storage tank 7 then enters the filter box 9 through the second drain pipe 8. The rainwater is further filtered by multiple filter screens 11 in the filter box 9. The filtered rainwater then enters the rainwater collection bucket 10 through a pipe for collection and reuse.

[0050] This rooftop rainwater harvesting and reuse system features multi-stage high-efficiency filtration and automatic cleaning functions, significantly improving the quality of rainwater collection and the stability of the system's operation. The first filter plate effectively intercepts larger debris, while the second telescopic drive mechanism automatically cleans the cleaning plate, preventing clogging. A settling filter pipe, in conjunction with the second filter plate and partitions, further filters smaller debris and causes soil to settle. The cleverly designed dual-set filter screens inside the filter box allow for automatic cleaning of the other side while one side is filtering. The self-cleaning mechanism supplies water to the transmission pipe via a water supply system, and the cleaning nozzles rinse the filter screens. The second drive mechanism rotates the transmission pipe for thorough rinsing. The entire process requires no downtime, is highly efficient and thorough, ensuring the filter screens maintain excellent filtration performance, resulting in higher quality collected rainwater and providing a reliable guarantee for subsequent reuse. This greatly improves the system's effectiveness and operational efficiency.

[0051] The device's intelligent control and rainwater power generation function bring significant energy-saving benefits and sustainable development value. The second solenoid valve on the second drainage pipe, along with the float and trigger switch in the water storage tank, constitutes an intelligent water level control system. This system precisely controls rainwater discharge based on the water level in the storage tank. The water flow through the second drainage pipe then drives the blades and drive shaft in the transmission box, which in turn generates electricity. This electrical energy is stored in the energy storage mechanism to support the device's operation. This method of converting rainwater flow energy into electrical energy reduces the device's dependence on external energy sources and lowers operating costs. Simultaneously, it embodies green environmental protection concepts, meets the requirements of sustainable development, and provides an innovative approach to energy recycling while achieving effective utilization of rainwater resources, possessing broad application prospects and positive social significance.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rooftop rainwater harvesting and reuse device, characterized in that, This includes a mounting plate installed on the roof drainage system, a rainwater collection tank mounted on the mounting plate and connected in sequence, a settling filter pipe, a filter box, and a rainwater collection bucket connected to the filter box. The rainwater collection box is equipped with a first filter inclined plate for filtering impurities in the rainwater; The settling filter pipe is equipped with a second filter inclined plate for further filtration of impurities; after the particles settle through the second filter inclined plate, the purified rainwater enters the filter box. The filter box is equipped with two sets of filter screens and a self-cleaning mechanism. The two sets of filter screens can rotate alternately to the bottom of the filter box inlet to filter rainwater. The self-cleaning mechanism is used to clean the filter screens that are away from the filter box inlet.

2. The rooftop rainwater harvesting and reuse device according to claim 1, characterized in that, The filter box is rotatably equipped with an installation tube, and two sets of filter screens are fixed to both sides of the installation tube. The bottom of the filter box is provided with a first driving mechanism, including a first telescopic driving member arranged laterally to the bottom of the filter box, a meshing transmission rack and a transmission gear, one side of the transmission rack being connected to the output end of the first telescopic driving member, and the transmission gear being sleeved on the mounting tube.

3. The rooftop rainwater harvesting and reuse device according to claim 2, characterized in that, The self-cleaning mechanism includes a water supply mechanism, a second drive mechanism, and a cleaning pipe; The water supply mechanism includes a first connecting pipe that is connected to the top of the installation pipe in the middle. The first connecting pipe is provided with a first solenoid valve at both ends and two transmission pipes that are rotatably connected below. The transmission pipes are rotatably connected to the filter screen plate. Each transmission pipe is connected to multiple cleaning pipes. The second driving mechanism is used to drive the transmission pipes so that the multiple cleaning pipes rotate. The water supply mechanism also includes a second connecting pipe connected to the installation pipe and the rainwater collection tank, for supplying water to the installation pipe, the first connecting pipe, the transmission pipe and the cleaning pipe via a water pump.

4. The rooftop rainwater harvesting and reuse device according to claim 3, characterized in that, The second drive mechanism is used to drive the transmission pipe away from the filter box inlet to rotate, and includes a rotation drive component. The output end of the rotation drive component rotatably passes through the filter box and is coaxial with a transmission pipe. An electromagnet block is fixed at the output end of the rotation drive component, a connecting block is fixed at the bottom end of each transmission tube, a transmission column is slidably connected to the connecting block, a connecting iron block is fixedly connected to the bottom end of the transmission column, and a spring is sleeved between the transmission column and the connecting block. After the electromagnet block and the connecting iron block are attracted to each other, the rotating drive component drives the transmission tube to rotate.

5. The rooftop rainwater harvesting and reuse device according to claim 4, characterized in that, The cleaning pipe is equipped with multiple cleaning nozzles.

6. The rooftop rainwater harvesting and reuse device according to claim 5, characterized in that, A water-separating plate is fixedly installed at the bottom of the filter box, and the water-separating plate is sleeved onto the mounting pipe; The filter box is also equipped with a drain pipe.

7. The rooftop rainwater harvesting and reuse device according to claim 1, characterized in that, The device also includes a water storage tank, which is connected to a sedimentation filter pipe and a filter box via a first drain pipe and a second drain pipe. An installation column is fixed inside the water storage tank, and a float is slidably connected to the installation column to detect the water level in the water storage tank. The second drain pipe is equipped with a second solenoid valve and a transmission box. A transmission shaft is rotatably connected inside the transmission box. A blade is fixed on the transmission shaft. The transmission shaft extends out of the transmission box and is connected to the generator. In response to the float detecting that the water level in the storage tank exceeds the preset water level, the second solenoid valve opens, causing the generator to generate electricity.

8. The rooftop rainwater harvesting and reuse device according to claim 5, characterized in that, The mounting column is equipped with a trigger switch that is electrically connected to the second solenoid valve at a position corresponding to the preset water level. When the float contacts the trigger switch, the second solenoid valve opens.

9. The rooftop rainwater harvesting and reuse device according to claim 1, characterized in that, The first filter inclined plate is provided with a second telescopic drive component, which is used to drive the cleaning plate to push the debris out of the rainwater collection box.

10. The rooftop rainwater harvesting and reuse device according to claim 1, characterized in that, The sedimentation filter tube is equipped with multiple inwardly inclined baffles to prevent the sedimented particles from surging upward.

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