A multifunctional rainwater collection and reuse device for a building

Abstract

The present invention relates to the field of construction, and specifically to a multifunctional rainwater collection and reuse device for a building, which comprises: a water inlet pipe, which is arranged at the bottom of a vertical drainage pipe of the building, and a monitoring device is arranged in the water inlet pipe; a flow direction control mechanism, which is arranged at the bottom of the water inlet pipe to control the outflow direction of rainwater, and three water outlet pipes are arranged thereon, namely a water supply pipe, a direct flow rejection pipe and a flow rejection functional pipe, the water supply pipe is connected to a water tank, and the bottoms of the direct flow rejection pipe and the flow rejection functional pipe are connected to a total flow rejection pipe; a water tank inner wall cleaning mechanism, which is arranged in the water tank to clean the inner wall of the water tank; and a control system, a turbidity meter is arranged at the end of the water tank, and a liquid level sensor is embedded in the inner wall of the tank cover. In the present invention, the rotation of the scraping rod can clean the water distributor and the inner wall of the end of the water tank, and the movement of the scraping ring can clean the inner peripheral wall of the water tank, and the microorganisms are replaced by new rainwater after being scraped off, thereby ensuring the water quality in the water tank.

Description

Technical Field

[0001] The invention relates to the technical field of building, and in particular to a multifunctional rainwater collection and reuse device for a building. Background Art

[0002] The rainwater collection device installed on the building is designed to make full use of rainwater resources and alleviate the problem of water shortage. Rainwater collection devices help promote the development of green buildings and achieve sustainable development goals.

[0003] A Chinese patent with announcement number CN115198976B discloses a multi-stage rainwater collection system for a photovoltaic integrated building, including a photovoltaic panel, a rainwater collection trough, a rainwater collection main pipe connected to the photovoltaic panel, and a water reservoir connected to the rainwater collection main pipe are provided on the photovoltaic panel, a first rainwater collection port, a second rainwater collection port, and a third rainwater collection port are provided on the rainwater collection trough, the first rainwater collection port, the second rainwater collection port, and the third rainwater collection port are connected, a first collecting pipe is provided on the first rainwater collection port, a second collecting pipe is provided on the second rainwater collection port, a third collecting pipe is provided on the third rainwater collection port, and the first collecting pipe, the second collecting pipe, and the third collecting pipe are respectively connected to the rainwater collection main pipe.

[0004] However, the above-mentioned publicly available scheme has the following shortcomings: although it can collect and store rainwater, it does not take into account the reproduction of microorganisms (usually attached to the inner wall of the container) when rainwater is stored in the storage container for a long time. If the collected rainwater itself contains certain microorganisms, if it is not used in time, it may cause the quality of the water stored in the container to deteriorate, affecting the use effect. Summary of the invention

[0005] The purpose of the present invention is to address the problem in the background technology that rainwater is stored in a storage container for a long time, causing microbial growth and affecting water quality, and to propose a multifunctional rainwater collection and reuse device for a building.

[0006] The technical solution of the present invention is: a multifunctional rainwater collection and reuse device for a building, comprising a water tank, a support seat is arranged at the bottom of the water tank, an opening is arranged at the top of the water tank, a tank cover is arranged on the opening, a drainage pipe is arranged at one end of the water tank, and a solenoid valve is arranged on the drainage pipe; and further comprising:

[0007] The water inlet pipe is arranged at the bottom of the vertical drainage pipe of the building, and a monitoring device is arranged inside the water inlet pipe to detect whether water flows through;

[0008] A flow direction control mechanism is arranged at the bottom of the water inlet pipe to control the outflow direction of rainwater. Three water outlet pipes are arranged on the flow direction control mechanism, namely a water supply pipe, a direct flow abandonment pipe and a flow abandonment function pipe. The water supply pipe is connected to the water tank, and the bottoms of the direct flow abandonment pipe and the flow abandonment function pipe are connected to the total flow abandonment pipe.

[0009] The water tank inner wall cleaning mechanism is arranged in the water tank to clean the inner wall of the water tank, and its operating power is the gravitational potential energy of the rainwater flowing into the main abandoned flow pipe;

[0010] And a control system, a turbidity meter for detecting the turbidity of rainwater inside the water tank is arranged at the end of the water tank, a liquid level sensor for monitoring the liquid level in the water tank is embedded in the inner wall of the tank cover, the control system is controlled and connected with the flow direction control mechanism and the solenoid valve, and the control system is data-transmittingly connected with the turbidity meter, the monitoring device and the photoelectric liquid level sensor.

[0011] Preferably, a plurality of studs are arranged on the top of the water tank, a plurality of through holes are arranged on the tank cover, the studs pass through the through holes, nuts are arranged on the studs, the tank cover is locked by the nuts, and a plurality of handles are arranged on the tank cover.

[0012] Preferably, a bracket is arranged on the support seat, a filtering device is arranged on the bracket, the filtering device is connected to the water supply pipe, and the filtering device passes the filtered water into the water tank.

[0013] Preferably, the flow direction control mechanism includes a spherical shell arranged at the bottom of the water inlet pipe, a rotating shaft rotatably arranged in the spherical shell, three sealing cones arranged on the rotating shaft, and an encoder motor a that drives the rotating shaft to rotate. The three sealing cones are arranged in sequence at intervals of ninety degrees along the circumferential direction, and the sealing cones are used to seal the water inlet end of the water supply pipe, the direct flow abandonment pipe or the flow abandonment function pipe; a bracket is arranged on the support seat, and the encoder motor a is arranged on the bracket.

[0014] Preferably, a water pumping pipe is provided at the end of the water tank, and the water pumping pipe is connected to a water pump to pump the water in the water tank out for use.

[0015] Preferably, a water distributor is provided on the inner wall of the end of the water tank, the water distributor is located at the water inlet side of the water tank, and the water distributor is connected to the water supply pipe.

[0016] Preferably, the water tank inner wall cleaning mechanism includes a rotating column rotatably arranged at the end of the water tank, an external thread arranged on the rotating column, a threaded sleeve cooperated with the external thread, a wall scraping ring arranged on the threaded sleeve via a connecting rod, and a plurality of actuating blades arranged along the circumferential direction at the end of the rotating column, the actuating blades are located in the main waste flow pipe, and the rotating column is driven to rotate by the gravitational potential energy of falling rainwater, the main waste flow pipe is provided with an impact position adjusting component for adjusting the position of the actuating blades impacted by falling rainwater, and the forward and reverse rotation of the rotating column is changed by changing the impact position of rainwater, the wall scraping ring contacts the inner wall of the water tank, a slider is provided on the top of the wall scraping ring, and a slide rail cooperating with the slider is provided on the inner wall of the tank cover.

[0017] Preferably, the impact position adjustment assembly includes a water guide plate rotatably arranged on the inner wall of the main abandoned flow pipe, and an encoder motor b connected to the rotating shaft of the water guide plate, and the encoder motor b is arranged on the outer wall of the main abandoned flow pipe.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects: the fan blades are driven by the impact of rainwater, thereby driving the rotating column to rotate, further moving the wall scraping ring, and rotating the edge scraping rod. The rotation of the edge scraping rod can clean the water distributor and the inner wall of the end of the water tank, and the movement of the wall scraping ring can clean the inner wall of the water tank, preventing microorganisms from breeding in the water tank. After the microorganisms are scraped off, they are replaced by new rainwater, thereby ensuring the water quality in the water tank and preventing the water from being deteriorated due to long-term storage and affecting its use. In addition, rainwater will not always impact and drive the fan blades, and the noise generated can also be reduced to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 and Figure 2 Each of them is a stereogram of an embodiment of the present invention;

[0020] Figure 3 for Figure 1 Schematic diagram of the internal structure of the medium water tank;

[0021] Figure 4 Schematic diagram of the internal structure of the total abandoned flow pipe;

[0022] Figure 5 Schematic diagram of the internal structure of the spherical shell.

[0023] 1. Water tank; 2. Support seat; 3. Tank cover; 4. Stud; 5. Nut; 6. Handle; 7. Drain pipe; 8. Solenoid valve; 9. Pumping pipe; 10. Water inlet pipe; 11. Ball shell; 12. Water inlet hole; 13. Water outlet hole; 14. Water supply pipe; 15. Direct flow rejection pipe; 16. Flow rejection function pipe; 17. Rotating shaft; 18. Blocking cone; 19. Encoder motor a; 20. Bracket; 21. Filter device; 22. Rotating column; 23. Limiting ring; 24. Scraping rod; 25. External thread; 26. Threaded sleeve; 27. Connecting rod; 28. Scraping ring; 29. ​​Slider; 30. Slide rail; 31. Actuating blade; 32. Water guide plate; 33. Encoder motor b; 34. Total flow rejection pipe; 35. Water distributor; 36. Turbidimeter; 37. Turbidimeter detection socket. DETAILED DESCRIPTION

[0024] Embodiment 1, as Figure 1-Figure 2As shown, the present invention proposes a multifunctional rainwater collection and reuse device for a building, including a water tank 1, a support base 2 is arranged at the bottom of the water tank 1, an opening is arranged at the top of the water tank 1, the opening is distributed along the length direction of the water tank 1, and both ends of the opening are at a distance from both ends of the water tank 1, and a box cover 3 is arranged on the opening. Specifically, a plurality of studs 4 are arranged on the top of the water tank 1, and a plurality of through holes are arranged on the box cover 3, and the studs 4 pass through the through holes. Nuts 5 are arranged on the studs 4 to lock the box cover 3 by the nuts 5, and a plurality of handles 6 are arranged on the box cover 3. In an optional embodiment, a total of six studs 4 are provided, and a group of three is divided into two groups, the two groups are respectively located on both sides of the opening, a drain pipe 7 is provided at one end of the water tank 1, a solenoid valve 8 is provided on the drain pipe 7, a water pumping pipe 9 is provided at the end of the water tank 1, the water pumping pipe 9 is connected to the water pump to pump the water in the water tank 1 out for use, the water inlet end of the water pumping pipe 9 is located at the bottom of the cross section of the water tank 1, a one-way valve is provided on the water pumping pipe 9, and water can only flow from the inside of the water tank 1 to the outside; it also includes:

[0025] The water inlet pipe 10 is arranged at the bottom of the vertical drainage pipe of the building. A monitoring device for detecting whether water flows through is arranged in the water inlet pipe 10. The monitoring device can be a flow sensor, an electromagnetic flow meter, an ultrasonic flow meter or a pressure sensor. The monitoring device only needs to detect that water flows through and transmit a signal to the control system.

[0026] A flow direction control mechanism is arranged at the bottom of the water inlet pipe 10 to control the outflow direction of rainwater. Three outlet pipes are arranged on the flow direction control mechanism, namely a water supply pipe 14, a direct flow abandonment pipe 15 and a flow abandonment function pipe 16. The water supply pipe 14 is connected to the water tank 1 to add water to the water tank 1. The connection point between the water supply pipe 14 and the water tank 1 is located at the top left side of the water tank 1. The bottoms of the direct flow abandonment pipe 15 and the flow abandonment function pipe 16 are connected to the total flow abandonment pipe 34. A bracket 20 is arranged on the support seat 2. A filter device 21 is arranged on the bracket 20. The filter device 21 is connected to the water supply pipe 14. The filter device 21 passes the filtered water into the water tank 1. In an optional embodiment, the filter device 21 includes a sewage interception hanging basket and a filter. The sewage interception hanging basket is used to block foreign matter in rainwater, and the filter is used to filter water. The filtering principle is adsorption filtration.

[0027] The water tank inner wall cleaning mechanism is arranged in the water tank 1 to clean the inner wall of the water tank, and its operating power is the gravitational potential energy of the rainwater flowing into the main abandoned flow pipe 34;

[0028] and a control system, wherein a turbidity meter 36 for detecting the turbidity of rainwater inside the water tank 1 is provided at the end of the water tank 1, and a liquid level sensor for monitoring the liquid level in the water tank 1 is embedded in the inner wall of the tank cover 3, and the liquid level sensor can be a photoelectric liquid level sensor, an ultrasonic liquid level sensor, a radar liquid level sensor or an infrared liquid level sensor, and the control system is controlled and connected with the flow direction control mechanism and the solenoid valve 8, and the control system is data-transmittedly connected with the turbidity meter 36, the monitoring device and the photoelectric liquid level sensor;

[0029] When the liquid level in the water tank 1 exceeds the set maximum liquid level value and the turbidity is lower than the set value, after rainwater enters the water inlet pipe 10, the flow direction control mechanism controls the rainwater to be directly discharged through the direct abandonment pipe 15; when the liquid level in the water tank 1 exceeds the set maximum liquid level value and the turbidity is higher than the set value, after rainwater enters the water inlet pipe 10, the flow direction control mechanism controls the rainwater to alternately pass through the water supply pipe 14 and the abandonment function pipe 16, and the solenoid valve 8 and the water supply pipe 14 are opened and closed synchronously, cleaning the inner wall of the water tank while replacing the rainwater in the water tank 1; when the liquid level in the water tank 1 is lower than the set maximum liquid level value and the turbidity is higher than the set value, after rainwater enters the water inlet pipe 10, the flow direction control mechanism controls the rainwater to alternately pass through the water supply pipe 14 and the abandonment function pipe 16, and the solenoid valve 8 and the water supply pipe 14 are opened and closed synchronously, and the rainwater in the water tank 1 is replaced while cleaning the inner wall of the water tank; When it is higher than the set value, after rainwater enters the water inlet pipe 10, the liquid level in the water tank 1 is first supplemented to above the set value through the water supply pipe 14. During this process, the solenoid valve 8 is closed, and then the flow control mechanism controls the rainwater to alternately pass through the water supply pipe 14 and the flow abandonment function pipe 16. The solenoid valve 8 and the water supply pipe 14 are opened and closed synchronously, and the rainwater in the water tank 1 is replaced while cleaning the inner wall of the water tank; when the liquid level in the water tank 1 is lower than the set maximum liquid level and the turbidity is lower than the set value, after rainwater enters the water inlet pipe 10, water is supplemented into the water tank 1 through the water supply pipe 14. During this process, the solenoid valve 8 is closed. The water tank 1 is supplemented with water through different rainwater flows, and the inner wall of the water tank 1 is cleaned. The water supply and replacement can ensure that the water quality in the water tank 1 is maintained at a good level, and prevent microorganisms from breeding on the inner wall of the water tank 1 and affecting the water quality.

[0030] Embodiment 2, as Figure 1 and Figure 5 As shown, the present invention proposes a multifunctional rainwater collection and reuse device for a building. Compared with the first embodiment, this embodiment introduces the structure of the flow direction control mechanism in detail.

[0031] The flow direction control mechanism includes a spherical shell 11 arranged at the bottom of the water inlet pipe 10, a rotating shaft 17 rotatably arranged in the spherical shell 11, three blocking cones 18 arranged on the rotating shaft 17, and an encoder motor a19 driving the rotating shaft 17 to rotate. The three blocking cones 18 are arranged in sequence at intervals of ninety degrees along the circumferential direction. The blocking cones 18 are used to block the water inlet end of the water supply pipe 14, the direct flow abandonment pipe 15 or the flow abandonment function pipe 16; a bracket 20 is arranged on the support seat 2, and the encoder motor a19 is arranged on the bracket 20; specifically, the top of the spherical shell 11 A water inlet hole 12 is arranged on the top to be opposite to the water inlet pipe 10, and water outlet holes 13 are arranged on the left and right sides and the bottom of the spherical shell 11, which are respectively opposite to the water supply pipe 14, the direct flow abandonment pipe 15 and the flow abandonment functional pipe 16. The diameter of the water outlet hole 13 is smaller than the diameter of the water inlet hole 12. The blocking cone 18 can block the water outlet hole 13 but cannot block the water inlet hole 12. The different blocking states of the three blocking cones 18 can guide rainwater into the water supply pipe 14, the direct flow abandonment pipe 15 or the flow abandonment functional pipe 16; the control system is controlled and connected with the encoder motor a19.

[0032] Embodiment three, as Figure 3 and Figure 4 As shown, the present invention proposes a multifunctional rainwater collection and reuse device for a building. Compared with the second embodiment, this embodiment introduces the structure of the water tank inner wall cleaning mechanism in detail.

[0033] A water distributor 35 is provided on the inner wall at the end of the water tank 1 . The water distributor 35 is located at the water inlet side of the water tank 1 . The water distributor 35 is connected to the water supply pipe 14 . Specifically, the water distributor 35 is connected to the water outlet end of the filter device 21 . Water is evenly introduced into the water tank 1 through the water distributor 35 .

[0034] The water tank inner wall cleaning mechanism includes a rotating column 22 rotatably arranged at the end of the water tank 1, an external thread 25 arranged on the rotating column 22, a threaded sleeve 26 cooperated with the external thread 25, a wall scraping ring 28 arranged on the threaded sleeve 26 through a connecting rod 27, and a plurality of actuating blades 31 arranged at the end of the rotating column 22 along the circumferential direction. The actuating blades 31 are located in a total waste flow pipe 34, and the rotating column 22 is driven to rotate by the gravitational potential energy of falling rainwater. An impact position adjustment component for adjusting the position of the rainwater impacting the actuating blades 31 is arranged on the total waste flow pipe 34. The forward and reverse rotation of the rotating column 22 is changed by changing the rainwater impact position. The wall scraping ring 28 contacts the inner wall of the water tank 1, a slider 29 is arranged on the top of the wall scraping ring 28, and a slide rail 30 cooperating with the slider 29 is arranged on the inner wall of the box cover 3. In an optional embodiment, scraping rods 24 are radially arranged at both ends of the rotating column 22, and the two scraping rods 24 are in contact with the water outlet end face of the water distributor 35 and the inner wall of the water outlet end of the water tank 1 respectively. The two scraping rods 24 are driven by the rotating column 22 to rotate to complete the cleaning of the end faces of the water tank 1 except the peripheral wall, thereby achieving comprehensive cleaning; the impact position adjustment component changes the working state according to time when working. In this embodiment, the time for controlling the single forward and reverse rotation of the rotating column 22 is one minute, ensuring that the scraping ring 28 can completely scrape the entire circumferential inner wall of the water tank 1. In order to limit the extreme positions of the two ends of the scraping ring 28, two limit rings 23 are set at both ends of the rotating column 22. When the threaded sleeve 26 contacts the limit ring 23, it can no longer move. At this time, when the rain impact drives the fan blades 31, the rotating column 22 will no longer continue to rotate. In order to facilitate the turbidity detection of the water in the water tank 1 by the turbidity meter 36, a turbidity meter detection socket 37 is opened on the end face of the rotating column 22. The detection end of the turbidity meter 36 is located in the turbidity meter detection socket 37. The end face of the rotating column 22 does not contact the inner wall of the water tank 1. Water can enter the turbidity meter detection socket 37, thereby completing the turbidity detection.

[0035] Furthermore, the impact position adjustment component includes a water guide plate 32 rotatably arranged on the inner wall of the main waste flow pipe 34, and an encoder motor b33 connected to the rotating shaft of the water guide plate 32. The encoder motor b33 is arranged on the outer wall of the main waste flow pipe 34, and a protective cover is provided for protection. When the water guide plate 32 is in a vertical state, rainwater enters the main waste flow pipe 34 and impacts the fan blades 31 to make the rotating column 22 rotate forward. When the water guide plate 32 is flipped upward and tilted, rainwater enters the main waste flow pipe 34 and impacts the fan blades to make the rotating column 22 reverse. The control system is controlled and connected to the encoder motor b33.

[0036] In summary, when the present invention is in use, the water inlet pipe 10 is vertically connected to the drainage pipe of the building. The drainage pipes of the building are all arranged vertically. When rainwater falls, there is a large gravitational potential energy. Especially in high-rise building structures, the gravitational potential energy of falling rainwater is more obvious. The water tank 1 is used to store rainwater. When the liquid level in the water tank 1 exceeds the set maximum liquid level value, and the turbidity is lower than the set value, after rainwater enters the water inlet pipe 10, the flow direction control mechanism controls the rainwater to be directly discharged through the direct abandonment pipe 15; when the liquid level in the water tank 1 exceeds the set maximum liquid level value, and the turbidity is higher than the set value, after rainwater enters the water inlet pipe 10, the flow direction control mechanism controls the rainwater to be alternately discharged through the water supply pipe 14 and the abandonment function pipe 16, and the solenoid valve 8 and the water supply pipe 14 are opened and closed synchronously, and the rainwater in the water tank 1 is replaced while cleaning the inner wall of the water tank; when the liquid level in the water tank 1 is lower than the set maximum liquid level value, and the turbidity is higher than the set value, When it is higher than the set value, after rainwater enters the water inlet pipe 10, the liquid level in the water tank 1 is first supplemented to above the set value through the water supply pipe 14. During this process, the solenoid valve 8 is closed, and then the flow direction control mechanism controls the rainwater to alternately pass through the water supply pipe 14 and the flow abandonment function pipe 16. The solenoid valve 8 and the water supply pipe 14 are opened and closed synchronously to clean the inner wall of the water tank and replace the rainwater in the water tank 1; when the liquid level in the water tank 1 is lower than the set maximum liquid level and the turbidity is lower than the set value, after rainwater enters the water inlet pipe 10, water is supplemented into the water tank 1 through the water supply pipe 14. During this process, the solenoid valve 8 is closed. The water tank 1 is replenished with water through different rainwater flows, and the inner wall of the water tank 1 is cleaned. The water replenishment and replacement can ensure that the water quality in the water tank 1 is maintained at a good level, prevent microorganisms from multiplying on the inner wall of the water tank 1 and affecting the water quality, and the rainwater will not always impact the driving fan blades 31. The inner wall cleaning will only be performed when the water turbidity in the water tank 1 is too high. At this time, the rainwater will impact the driving fan blades 31. The time for the water quality of the rainwater to deteriorate after filtration will not be too short. Therefore, the working cycle of the driving fan blades 31 is longer, which can reduce the impact of noise on the surrounding area.

[0037] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A multifunctional rainwater collection and reuse device for a building, comprising a water tank (1), a support base (2) being arranged at the bottom of the water tank (1), an opening being arranged at the top of the water tank (1), a tank cover (3) being arranged on the opening, a drainage pipe (7) being arranged at one end of the water tank (1), and a solenoid valve (8) being arranged on the drainage pipe (7); characterized in that: Also includes: A water inlet pipe (10) is arranged at the bottom of a vertical drainage pipe of a building, and a monitoring device for detecting whether water is flowing through is arranged inside the water inlet pipe (10); A flow direction control mechanism is arranged at the bottom of the water inlet pipe (10) to control the outflow direction of rainwater. Three water outlet pipes are arranged on the flow direction control mechanism, namely a water supply pipe (14), a direct flow abandonment pipe (15) and a flow abandonment function pipe (16). The water supply pipe (14) is connected to the water tank (1). The bottoms of the direct flow abandonment pipe (15) and the flow abandonment function pipe (16) are connected to the main flow abandonment pipe (34). A water tank inner wall cleaning mechanism, arranged in the water tank (1) and used for cleaning the inner wall of the water tank, the operating power of which is the gravitational potential energy of rainwater flowing into the main waste flow pipe (34); and a control system, wherein a turbidity meter (36) for detecting the turbidity of rainwater in the water tank (1) is disposed at the end of the water tank (1), a liquid level sensor for monitoring the height of the liquid level in the water tank (1) is embedded in the inner wall of the tank cover (3), the control system is control-connected to the flow direction control mechanism and the electromagnetic valve (8), and the control system is data-transmittingly connected to the turbidity meter (36), the monitoring device, and the photoelectric liquid level sensor; The flow direction control mechanism comprises a spherical shell (11) arranged at the bottom of a water inlet pipe (10), a rotating shaft (17) rotatably arranged in the spherical shell (11), three blocking cones (18) arranged on the rotating shaft (17), and an encoder motor a (19) driving the rotating shaft (17) to rotate, wherein the three blocking cones (18) are arranged in sequence at intervals of ninety degrees along a circumferential direction, and the blocking cones (18) are used to block the water inlet end of a water supply pipe (14), a direct flow abandonment pipe (15) or a flow abandonment function pipe (16); a bracket (20) is arranged on the support seat (2), and the encoder motor a (19) is arranged on the bracket (20).

2. The multifunctional rainwater collection and recycling device for buildings according to claim 1 is characterized in that: A plurality of studs (4) are arranged on the top of the water tank (1), a plurality of through holes are arranged on the tank cover (3), the studs (4) pass through the through holes, nuts (5) are arranged on the studs (4), the tank cover (3) is locked by the nuts (5), and a plurality of handles (6) are arranged on the tank cover (3).

3. The multifunctional rainwater collection and recycling device for buildings according to claim 1 is characterized in that: A bracket (20) is arranged on the support seat (2), a filter device (21) is arranged on the bracket (20), the filter device (21) is connected to the water supply pipe (14), and the filter device (21) passes the filtered water into the water tank (1).

4. The multifunctional rainwater collection and recycling device for buildings according to claim 1 is characterized in that: A water pumping pipe (9) is provided at the end of the water tank (1), and the water pumping pipe (9) is connected to a water pump to pump water in the water tank (1) out for use.

5. The multifunctional rainwater collection and recycling device for buildings according to claim 1 is characterized in that: A water distributor (35) is provided on the inner wall of the end of the water tank (1). The water distributor (35) is located on the water inlet side of the water tank (1). The water distributor (35) is connected to the water supply pipe (14).

6. The multifunctional rainwater collection and recycling device for buildings according to claim 5, characterized in that: The water tank inner wall cleaning mechanism comprises a rotating column (22) rotatably arranged at the end of the water tank (1), an external thread (25) arranged on the rotating column (22), a threaded sleeve (26) cooperating with the external thread (25), a wall scraping ring (28) arranged on the threaded sleeve (26) via a connecting rod (27), and a plurality of actuating blades (31) arranged at the end of the rotating column (22) along a circumferential direction, wherein the actuating blades (31) are located in a main waste flow pipe (34). The gravitational potential energy of falling rainwater drives the rotating column (22) to rotate. The main abandoned flow pipe (34) is provided with an impact position adjustment component for adjusting the position of the fan blade (31) driven by the impact of falling rainwater. The forward and reverse rotation of the rotating column (22) is changed by changing the impact position of rainwater. The scraper ring (28) contacts the inner wall of the water tank (1). A slider (29) is provided on the top of the scraper ring (28). A slide rail (30) cooperating with the slider (29) is provided on the inner wall of the tank cover (3).

7. The multifunctional rainwater collection and recycling device for buildings according to claim 6, characterized in that: The impact position adjustment assembly comprises a water guide plate (32) rotatably arranged on the inner wall of the main abandoned flow pipe (34), and an encoder motor b (33) connected to the rotating shaft of the water guide plate (32), wherein the encoder motor b (33) is arranged on the outer wall of the main abandoned flow pipe (34).

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