Constructed wetland rainwater purification and reuse device and use method thereof

Abstract

The application belongs to the technical field of rainwater purification treatment, and discloses an artificial wetland rainwater purification and recycling device and a use method thereof. The rainwater purification and recycling device comprises a water storage tank, a mounting frame fixed around the water storage tank, and a collecting barrel fixed to the mounting frame and located above the water storage tank. The top of the collecting barrel is funnel-shaped, and the bottom is closed. A water guide pipe in communication with the inside of the water storage tank is arranged through the sidewall of the collecting barrel. A filter screen is fixed to the inner wall of the collecting barrel near the water inlet of the water guide pipe. An annular notch in abutment with the bottom of the filter screen is arranged on the inner wall of the collecting barrel. A protection assembly for shielding the filter screen when it is not raining and exposing the filter screen when it is raining is arranged in the collecting barrel. The application can shield and protect the filter screen when the rainfall is less or when it is not raining, thereby reducing the probability of clogging of the filter screen and facilitating normal use of the rainwater purification and recycling device.

Description

Technical Field

[0001] This invention relates to the field of rainwater purification and treatment technology, and in particular to an artificial wetland rainwater purification and reuse device and its usage method. Background Technology

[0002] Constructed wetlands are an emerging wastewater treatment technology that has rapidly developed worldwide due to their advantages such as low investment cost, high purification efficiency, and simple maintenance. They are widely used in the treatment of agricultural, landscape, and domestic wastewater. They effectively remove organic pollutants, as well as nitrogen and phosphorus, from wastewater. Utilizing the synergistic physical, chemical, and biological processes of soil, plants, artificial media, and microorganisms within constructed wetlands, rainwater is treated. Currently, constructed wetland rainwater harvesting systems are a technology that collects rainwater, performs simple sedimentation and filtration, and then reuses it. The treated rainwater can be used as greywater for purposes such as toilet flushing, watering green spaces, spraying roads, or recharge groundwater, achieving zero rainwater discharge. For water-scarce regions, this technology can increase available water resources, alleviate water shortages, and prevent rainwater from mixing with wastewater, thereby reducing the pressure and burden on wastewater treatment.

[0003] Existing general-purpose artificial wetland rainwater purification and reuse devices typically include a collection tank and a filter screen installed inside the collection tank. The filter screen can filter out debris such as branches and fallen leaves. However, this design usually has the following drawbacks: in seasons with less rainfall and flying willow catkins, the exposed filter screen is easily clogged by the catkins, affecting the normal use of the filter screen in the later stages. Therefore, relevant technological improvements are needed. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides an artificial wetland rainwater purification and reuse device and its usage method.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: an artificial wetland rainwater purification and reuse device, comprising a water storage tank, an installation frame fixed around the water storage tank, and a collection bucket fixed on the installation frame and located above the water storage tank. The top of the collection bucket is funnel-shaped and the bottom is closed. A water guide pipe communicating with the inside of the water storage tank is provided through the side wall of the collection bucket. A filter screen is fixed on the inner wall of the collection bucket near the water inlet of the water guide pipe. An annular notch is provided on the inner wall of the collection bucket to abut the bottom of the filter screen. A protective component is provided inside the collection bucket for covering the filter screen when there is no rain and exposing the filter screen when there is heavy rain.

[0006] By adopting the above technical solution, the protective component can cover the filter screen when there is no rain and expose the filter screen when there is heavy rain, thereby protecting the filter screen and greatly reducing the probability of the filter screen being blocked by fallen leaves, willow catkins and other debris, which is conducive to the normal use of the artificial wetland rainwater purification and reuse device.

[0007] Furthermore, the protective assembly includes a protective sleeve that slides against the inner wall of the collection bucket below the filter screen, an annular plate integrally formed with the bottom of the protective sleeve, a baffle cup integrally formed with the inner side of the annular plate, and a spring fixed to the bottom of the annular plate. The outer wall of the protective sleeve is fitted against the side of the filter screen near the axis of the collection bucket. The bottom of the collection bucket is provided with a through hole for the baffle cup to pass through. The spring has multiple springs and is evenly distributed about the axis of the annular plate. The lower end of the spring is fixed to the bottom wall of the collection bucket.

[0008] By adopting the above technical solution, when rainfall is low, the annular plate rises under the elastic force of multiple springs, and the protective sleeve covers the filter screen, thereby reducing the probability of the filter screen being clogged by fallen leaves, willow catkins, and other debris. When rainfall is high, more rainwater is collected in the annular component formed by the protective sleeve, annular plate, and baffle cup. Under the gravity of the rainwater, the annular component compresses multiple springs, causing the protective sleeve to separate from the filter screen and exposing the filter screen. When the rainwater level exceeds the height of the filter screen, the rainwater in the collection bucket flows through the mesh of the filter screen and into the water storage tank through the water pipe. When there is no rainfall or the rainfall is low, the protective sleeve covers the filter screen, enhancing the protection of the filter screen and reducing the probability of the filter screen being clogged by fallen leaves, willow catkins, and other debris, ensuring the normal operation of the rainwater purification and reuse device.

[0009] Furthermore, a baffle ring is fixed on the bottom wall of the collection bucket near the baffle cup, and multiple water-permeable holes are evenly opened on the side wall of the baffle ring.

[0010] By adopting the above technical solution, the baffle ring effectively blocks the small amount of water seeping down between the inner wall of the collection bucket and the outer wall of the protective sleeve, and the permeable holes facilitate drainage when there is a large amount of water accumulating between the bottom of the collection bucket and the baffle ring.

[0011] Furthermore, the top of the protective sleeve is provided with an annular body that slides and engages with the inner wall of the collection bucket above the filter screen. The annular body is provided with multiple mounting cavities, and each mounting cavity is provided with an auxiliary component for assisting the protective sleeve to reset. The auxiliary component includes a rotating shaft rotatably mounted on the inner wall of the mounting cavity, a winding wheel fixedly sleeved on the rotating shaft, a traction rope wound and fixed on the winding wheel, and a torsion spring sleeved on the rotating shaft. The free end of the traction rope passes through the bottom of the annular body and is fixed to the top of the protective sleeve. One end of the torsion spring is fixed to the side wall of one side of the winding wheel, and the other end of the torsion spring is fixed to the inner wall of the mounting cavity.

[0012] Furthermore, multiple rainwater monitoring sensors are fixed on the top of the collection bucket, and a controller electrically connected to the rainwater monitoring sensors is fixed on the top of the water storage tank. A water pump electrically connected to the controller is fixed inside the baffle cup. The water outlet pipe of the water pump passes through the side wall of the baffle cup and is fixed to the baffle cup. The water outlet pipe of the water pump passes through the water storage tank and slides in cooperation with the water storage tank.

[0013] By adopting the above technical solution, the rainwater monitoring sensor monitors the rainfall in real time and transmits the monitoring information to the controller in the form of an electrical signal. When the rainwater monitoring sensor detects no rainfall or low rainfall, the controller controls the water pump to work and pumps the rainwater collected in the annular part formed by the protective sleeve, the ring plate and the baffle cup from the outlet pipe of the water pump to the water storage tank.

[0014] Furthermore, a protective net cover is fixed to the top of the collection tank and placed outside the multiple rainwater monitoring sensors, and a spherical net cover is fixedly fitted to the inlet of the water pump.

[0015] By adopting the above technical solutions, the protective netting effectively protects the rainwater monitoring sensor, reducing the probability of the rainwater monitoring sensor being damaged by hard objects. The spherical netting protects the water inlet pipe of the water pump, reducing the probability of debris clogging the water inlet pipe of the water pump.

[0016] Furthermore, a lower water pump is fixed to one side of the water storage tank, and the inlet pipe of the lower water pump is fixed to and connected to the side wall of the water storage tank.

[0017] By adopting the above technical solution, when utilizing the rainwater in the reservoir, staff only need to turn on the bottom pump. The bottom pump will recycle the rainwater in the reservoir for use in irrigating artificial wetlands and other vegetation during seasons with less rainfall.

[0018] The present invention also discloses a method for using an artificial wetland rainwater purification and reuse device, comprising the following steps: S1. When there is a lot of rainfall around the artificial wetland, the rainwater falls into the collection bucket. When a lot of rainwater is collected in the ring-shaped part formed by the protective sleeve, the ring plate and the baffle cup, the ring-shaped part compresses multiple springs under the action of the rainwater gravity. The protective sleeve separates from the filter screen and exposes the filter screen. When the rainwater level exceeds the height of the filter screen, the rainwater in the collection bucket enters the water storage tank through the mesh of the filter screen and the water pipe. When there is no rain or the rainfall is small, the protective sleeve covers the filter screen, which enhances the protection of the filter screen and reduces the probability of the filter screen being blocked by fallen leaves, willow catkins and other debris, ensuring the normal use of the rainwater purification and reuse device. S2. When the rainwater monitoring sensor detects little or no rainfall, the controller controls the water pump to operate. The water pump pumps the accumulated water in the annular part formed by the protective sleeve, the ring plate and the baffle cup into the water storage tank so that the protective sleeve, the ring plate and the baffle cup can be reset. The protective sleeve will then cover and protect the filter screen again. The spherical mesh cover plays a good role in intercepting debris entering the water pump and reduces the probability of the water pump's inlet pipe being blocked.

[0019] In summary, the present invention has the following beneficial effects: 1. This application can shield and protect the filter screen when there is little or no rainfall, reducing the probability of filter screen clogging and facilitating the normal use of the rainwater purification and reuse device; 2. In this application, when rainfall is light, the annular plate rises under the elastic force of multiple springs, and the protective sleeve covers the filter screen, thereby reducing the probability of the filter screen being clogged by fallen leaves, willow catkins, and other debris. When rainfall is heavy, more rainwater is collected in the annular component formed by the protective sleeve, the annular plate, and the baffle cup. Under the gravity of the rainwater, the annular component compresses multiple springs, causing the protective sleeve to separate from the filter screen and exposing the filter screen. When the rainwater level exceeds the height of the filter screen, the rainwater in the collection bucket enters the storage tank through the mesh of the filter screen and the water pipe for storage. When there is no rainfall or the rainfall is light, the protective sleeve covers the filter screen, enhancing the protection of the filter screen and reducing the probability of the filter screen being clogged by fallen leaves, willow catkins, and other debris, thus ensuring the normal operation of the rainwater purification and reuse device. 3. When utilizing the rainwater in the reservoir, staff only need to turn on the lower water pump to recycle the rainwater in the reservoir for use in irrigating artificial wetlands and other vegetation during seasons with less rainfall. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a schematic diagram illustrating the structure of the protective component in an embodiment of the present invention; Figure 3 yes Figure 2 Enlarged diagram of point A in the middle.

[0021] In the diagram: 1. Water storage tank; 11. Controller; 12. Lower water pump; 2. Mounting frame; 3. Collection bucket; 31. Water guide pipe; 32. Filter screen; 33. Annular notch; 34. Perforation; 35. Rainwater monitoring sensor; 4. Protective components; 41. Protective sleeve; 42. Annular plate; 43. Baffle cup; 431. Upper water pump; 44. Spring; 5. Baffle ring; 51. Water permeable hole; 6. Circular ring; 61. Mounting cavity; 7. Auxiliary components; 71. Rotating shaft; 72. Winding reel; 73. Traction rope; 74. Torsion spring; 8. Protective net cover; 9. Spherical net cover. Detailed Implementation

[0022] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0023] like Figure 1-3 As shown in the figure, this application discloses an artificial wetland rainwater purification and reuse device and its usage method, including a water storage tank 1, a mounting frame 2, a collection bucket 3, and a protective component 4. The water storage tank 1 is a hollow cuboid structure. The mounting frame 2 is fixed around the water storage tank 1. The collection bucket 3 is fixed on the mounting frame 2 and located above the water storage tank 1. The top of the collection bucket 3 is funnel-shaped and the bottom is closed.

[0024] In this embodiment, a water pipe 31 communicating with the inside of the water storage tank 1 is provided through the side wall of the collection bucket 3. A filter screen 32 is fixed on the inner wall of the collection bucket 3 near the water inlet of the water pipe 31. An annular notch 33 is provided on the inner wall of the collection bucket 3 to abut against the bottom of the filter screen 32.

[0025] A protective component 4 is installed inside the collection bucket 3 to cover the filter screen 32 when there is no rain and expose the filter screen 32 when there is heavy rain. The protective component 4 includes a protective sleeve 41 that slides with the inner wall of the collection bucket 3 below the filter screen 32, an annular plate 42 integrally formed with the bottom of the protective sleeve 41, a baffle cup 43 integrally formed with the inner side of the annular plate 42, and a spring 44 fixed to the bottom of the annular plate 42. The outer wall of the protective sleeve 41 is fitted to the side of the filter screen 32 near the axis of the collection bucket 3. A through hole 34 is provided through the bottom of the collection bucket 3 for the baffle cup 43 to pass through. Multiple springs 44 are evenly distributed about the axis of the annular plate 42, and the lower end of the springs 44 is fixed to the inner bottom wall of the collection bucket 3. When there is little rain, the annular plate 42 is raised under the elastic force of the multiple springs 44, and the protective sleeve 41 covers the filter screen 32, thereby reducing the probability of the filter screen 32 being blocked by fallen leaves, willow catkins and other debris. When there is heavy rainfall, a large amount of rainwater is collected in the annular component formed by the protective sleeve 41, the ring plate 42, and the baffle cup 43. Under the gravity of the rainwater, the annular component compresses multiple springs 44, causing the protective sleeve 41 to separate from the filter screen 32 and exposing the filter screen 32. When the rainwater level exceeds the height of the filter screen 32, the rainwater in the collection bucket 3 flows from the mesh of the filter screen 32 into the water storage tank 1 through the water pipe 31 for storage. When there is no rainfall or the rainfall is low, the protective sleeve 41 covers the filter screen 32, enhancing the protection of the filter screen 32, reducing the probability of the filter screen 32 being blocked by fallen leaves, willow catkins, and other debris, and ensuring the normal operation of the rainwater purification and reuse device.

[0026] In this embodiment, a baffle ring 5 is fixed on the bottom wall of the collection bucket 3 near the baffle cup 43. Multiple water-permeable holes 51 are evenly opened on the side wall of the baffle ring 5. The baffle ring 5 acts as a shield to block a small amount of water seeping down from between the inner wall of the collection bucket 3 and the outer wall of the protective sleeve 41. The water-permeable holes 51 make it easier to drain when there is a large amount of water accumulated between the bottom of the collection bucket 3 and the baffle ring 5.

[0027] The top of the protective sleeve 41 is provided with an annular body 6 that slides and engages with the inner wall of the collection bucket 3 above the filter screen 32. The annular body 6 is provided with multiple mounting cavities 61. Each mounting cavity 61 is provided with an auxiliary component 7 for assisting the reset of the protective sleeve 41. The auxiliary component 7 includes a rotating shaft 71 rotatably mounted on the inner wall of the mounting cavity 61, a winding wheel 72 fixedly sleeved on the rotating shaft 71, a traction rope 73 wound and fixed on the winding wheel 72, and a torsion spring 74 sleeved on the rotating shaft 71. The free end of the traction rope 73 passes through the bottom of the annular body 6 and is fixed to the top of the protective sleeve 41. One end of the torsion spring 74 is fixed to the side wall of one side of the winding wheel 72, and the other end of the torsion spring 74 is fixed to the inner wall of the mounting cavity 61. Multiple rainwater monitoring sensors 35 are fixed to the top of the collection bucket 3. A controller 11, electrically connected to the rainwater monitoring sensors 35, is fixed to the top of the water storage tank 1. A water pump 431, electrically connected to the controller 11, is fixed inside the baffle cup 43. The outlet pipe of the water pump 431 passes through the side wall of the baffle cup 43 and is fixed to the baffle cup 43. The outlet pipe of the water pump 431 also passes through the water storage tank 1 and slides in fit with the water storage tank 1. The rainwater monitoring sensors 35 monitor the rainfall in real time and transmit the monitoring information to the controller 11 in the form of an electrical signal. When the rainwater monitoring sensors 35 detect no rainfall or low rainfall, the controller 11 controls the water pump 431 to work and pumps the rainwater collected in the annular part formed by the protective sleeve 41, the annular plate 42, and the baffle cup 43 from the outlet pipe of the water pump 431 into the water storage tank 1.

[0028] To protect the rainwater monitoring sensors 35, a protective net cover 8 is fixed to the top of the collection tank 3, covering the outside of the multiple rainwater monitoring sensors 35. To reduce the probability of blockage in the inlet pipe of the water pump 431, a spherical net cover 9 is fixedly fitted over the inlet of the water pump 431. To facilitate the reuse of rainwater in the reservoir 1, a lower outlet pump 12 is fixed to one side of the reservoir 1. The inlet pipe of the lower outlet pump 12 is fixed to and connected to the side wall of the reservoir 1. When utilizing the rainwater in the reservoir 1, the staff only needs to turn on the lower outlet pump 12, which will recycle the rainwater in the reservoir 1 for use in irrigating artificial wetlands and other vegetation during seasons with less rainfall.

[0029] The operating principle of the artificial wetland rainwater purification and reuse device in this embodiment is as follows: When rainfall is low, the annular plate 42 is raised under the elastic force of multiple springs 44, and the protective sleeve 41 covers the filter screen 32, thereby reducing the probability of the filter screen 32 being blocked by fallen leaves, willow catkins, and other debris. When rainfall is high, more rainwater is collected in the annular component formed by the protective sleeve 41, the annular plate 42, and the baffle cup 43. Under the gravity of the rainwater, the annular component compresses multiple springs 44, the protective sleeve 41 separates from the filter screen 32, and the filter screen 32 is exposed. When the rainwater level exceeds the height of the filter screen 32, the rainwater in the collection bucket 3 enters the water storage tank 1 through the mesh of the filter screen 32 and the water guide pipe 31 for storage. When there is no rainfall or the rainfall is low, the protective sleeve 41 covers the filter screen 32, enhancing the protection of the filter screen 32, reducing the probability of the filter screen 32 being blocked by fallen leaves, willow catkins, and other debris, and ensuring the normal operation of the rainwater purification and reuse device.

[0030] This application also discloses a method for using an artificial wetland rainwater purification and reuse device, including the following steps: S1. When there is a lot of rainfall around the artificial wetland, the rainwater falls into the collection bucket 3. When a lot of rainwater is collected in the ring formed by the protective sleeve 41, the annular plate 42 and the baffle cup 43, the annular part compresses multiple springs 44 under the action of the rainwater gravity. The protective sleeve 41 separates from the filter screen 32 and exposes the filter screen 32. When the rainwater level exceeds the height of the filter screen 32, the rainwater in the collection bucket 3 enters the water storage tank 1 through the water pipe 31 from the mesh of the filter screen 32. When there is no rain or the rainfall is small, the protective sleeve 41 covers the filter screen 32, which enhances the protection of the filter screen 32, reduces the probability of the filter screen 32 being blocked by fallen leaves, willow catkins and other debris, and ensures the normal use of the rainwater purification and reuse device. S2. When the rainwater monitoring sensor 35 detects that the rainfall is low or there is no rainfall, the controller 11 controls the water pump 431 to work. The water pump 431 pumps the water accumulated in the annular part formed by the protective sleeve 41, the annular plate 42 and the baffle cup 43 into the water storage tank 1 so that the protective sleeve 41, the annular plate 42 and the baffle cup 43 can be reset. The protective sleeve 41 can then cover and protect the filter screen 32 again. The spherical mesh cover 9 plays a good role in intercepting debris entering the water pump 431, reducing the probability of the water pump 431's inlet pipe being blocked.

[0031] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An artificial wetland rainwater purification and reuse device, comprising a water storage tank (1), a mounting frame (2) fixed around the water storage tank (1), and a collection bucket (3) fixed on the mounting frame (2) and located above the water storage tank (1), characterized in that: The top of the collection bucket (3) is funnel-shaped and the bottom is closed. A water pipe (31) communicating with the inside of the water storage tank (1) is installed through the side wall of the collection bucket (3). A filter screen (32) is fixed on the inner wall of the collection bucket (3) near the water inlet of the water pipe (31). An annular notch (33) that abuts against the bottom of the filter screen (32) is provided on the inner wall of the collection bucket (3). A protective component (4) is provided inside the collection bucket (3) to cover the filter screen (32) when there is no rain and to expose the filter screen (32) when there is a lot of rain. The protective component (4) includes a protective sleeve (41) that slides with the inner wall of the collection bucket (3) below the filter screen (32), an annular plate (42) integrally formed with the bottom of the protective sleeve (41), a baffle (43) integrally formed with the inner side of the annular plate (42), and a spring (44) fixed to the bottom of the annular plate (42). The outer wall of the protective sleeve (41) is attached to the side of the filter screen (32) near the axis of the collection bucket (3). The bottom of the collection bucket (3) is provided with a through hole (34) for the baffle (43) to pass through. The spring (44) is provided with multiple springs and is evenly distributed about the axis of the annular plate (42). The lower end of the spring (44) is fixed to the inner bottom wall of the collection bucket (3). The top of the protective sleeve (41) is provided with an annular body (6) that slides with the inner wall of the collection bucket (3) above the filter screen (32). The annular body (6) is provided with multiple mounting cavities (61). Each mounting cavity (61) is provided with an auxiliary component (7) for assisting the reset of the protective sleeve (41). The auxiliary component (7) includes a rotating shaft (71) rotatably mounted on the inner wall of the mounting cavity (61), a winding wheel (72) fixedly sleeved on the rotating shaft (71), a traction rope (73) wound and fixed on the winding wheel (72), and a torsion spring (74) sleeved on the rotating shaft (71). The free end of the traction rope (73) passes through the bottom of the annular body (6) and is fixed to the top of the protective sleeve (41). One end of the torsion spring (74) is fixed to the side wall of one side of the winding wheel (72), and the other end of the torsion spring (74) is fixed to the inner wall of the mounting cavity (61). Multiple rainwater monitoring sensors (35) are fixed on the top of the collection bucket (3), and a controller (11) electrically connected to the rainwater monitoring sensors (35) is fixed on the top of the water storage tank (1). A water pump (431) electrically connected to the controller (11) is fixed inside the baffle cup (43). The water outlet pipe of the water pump (431) passes through the side wall of the baffle cup (43) and is fixed to the baffle cup (43). The water outlet pipe of the water pump (431) passes through the water storage tank (1) and slides with the water storage tank (1).

2. The artificial wetland rainwater purification and reuse device according to claim 1, characterized in that: A baffle ring (5) is fixed on the bottom wall of the collection bucket (3) near the baffle cup (43), and multiple water-permeable holes (51) are evenly opened on the side wall of the baffle ring (5).

3. The artificial wetland rainwater purification and reuse device according to claim 1, characterized in that: The top of the collection bucket (3) is fixed with a protective net cover (8) covering the outside of multiple rainwater monitoring sensors (35), and the inlet of the water pump (431) is fixedly fitted with a spherical net cover (9).

4. The artificial wetland rainwater purification and reuse device according to claim 1, characterized in that: A lower water pump (12) is fixed on one side of the water storage tank (1), and the water inlet pipe of the lower water pump (12) is fixed and connected to the side wall of the water storage tank (1).

5. A method of using the constructed wetland rainwater purification and reuse device according to claim 3, characterized in that, The usage method includes the following steps: S1. When there is a lot of rain around the artificial wetland, the rainwater falls into the collection bucket (3). When a lot of rainwater is collected in the ring formed by the protective sleeve (41), the ring plate (42) and the baffle (43), the ring compresses multiple springs (44) under the action of the rainwater gravity. The protective sleeve (41) separates from the filter screen (32) and exposes the filter screen (32). When the rainwater level exceeds the height of the filter screen (32), the rainwater in the collection bucket (3) enters the water storage tank (1) through the mesh of the filter screen (32) and the water pipe (31) for storage. When there is no rain or the amount of rain is small, the protective sleeve (41) covers the filter screen (32), which enhances the protection of the filter screen (32), reduces the probability of the filter screen (32) being blocked by fallen leaves, willow catkins and other debris, and ensures the normal use of the rainwater purification and reuse device. S2. When the rainwater monitoring sensor (35) detects that the rainfall is low or there is no rainfall, the controller (11) controls the water pump (431) to work. The water pump (431) pumps the water in the ring formed by the protective sleeve (41), the ring plate (42) and the baffle (43) into the water storage tank (1) so that the protective sleeve (41), the ring plate (42) and the baffle (43) can be reset. The protective sleeve (41) will cover and protect the filter screen (32) again. The spherical mesh cover (9) plays a good role in intercepting the debris entering the water pump (431) and reducing the probability of the water inlet pipe of the water pump (431) being blocked.

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