Rainwater collecting and purifying device for green building

Abstract

The application discloses a kind of green building rainwater collection purification devices, it is related to rainwater collection purification technical field, with only subsequent rainwater that is in contact with roof is handled, to reduce rainwater collection purification device rainwater processing time The advantage that it is handled, its technical scheme main point is: including water storage tank and the filter box being set on water storage tank, filter box is connected with the drain pipe of roof by hose, filter mechanism is set in filter box for filtering rainwater, purification mechanism is set in filter box for purifying rainwater that passes through filter mechanism, purification mechanism is communicated with water storage tank, shunt mechanism is set on filter box and is communicated with hose, water storage tank and the side of filter box vertically is equipped with drain pipeline, and the side of drain pipeline away from water storage tank is equipped with the connecting pipe being communicated with drain pipeline below, shunt mechanism is used to discharge rainwater B to drain pipeline, rainwater B1 is discharged to filter mechanism in filter box.

Description

Technical Field

[0001] This invention relates to the field of rainwater harvesting and purification technology, specifically to a rainwater harvesting and purification device for green buildings. Background Technology

[0002] Green buildings, throughout their entire lifecycle, conserve resources, protect the environment, reduce pollution, and provide people with healthy and efficient living spaces, maximizing the harmonious coexistence of humans and nature into high-quality architecture. Rainwater harvesting and reuse is a key aspect of green building construction, achieving energy conservation, emission reduction, and environmental protection. It provides water access during droughts and emergencies and can also be used for domestic water supply, saving tap water. Most green buildings utilize rainwater harvesting and purification systems to collect and treat rainwater.

[0003] However, most current rainwater harvesting and purification devices directly collect and purify rainwater, failing to separate the initial rainfall from subsequent rainfall. The initial rainfall is referred to as Rainwater B, and the subsequent rainfall as Rainwater B1. In the initial rainfall, Rainwater B washes over the building's roof, bringing dust and oil with it, resulting in severe pollution. After the initial rainfall washes over the roof, the subsequent Rainwater B1, which comes into contact with the roof, becomes less polluted. If Rainwater B and Rainwater B1 are not separated, all rainwater enters the rainwater harvesting and purification device. This mixing of Rainwater B and Rainwater B1 within the device increases the processing time. Therefore, the applicant has developed a new technical solution to address these technical problems during actual production. Summary of the Invention

[0004] To address the aforementioned technical shortcomings, the present invention aims to provide a rainwater collection and purification device for green buildings, which has the advantage of treating only rainwater that subsequently comes into contact with the roof, thereby reducing the rainwater treatment time of the rainwater collection and purification device.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] This invention provides a rainwater collection and purification device for green buildings, including a water storage tank and a filter box installed on the water storage tank. The filter box is connected to the roof drain pipe via a hose. The device also includes a filtration mechanism installed in the filter box for filtering rainwater.

[0007] A purification mechanism is installed in a filter box to purify rainwater that has passed through the filter. The purification mechanism is connected to a water storage tank, and a water outlet pipe is provided on one side of the lower part of the water storage tank.

[0008] The diversion mechanism is installed on the filter box and connected to the hose. The water storage tank and the filter box are vertically provided with a drainage pipe on one side, and a connecting pipe connected to the drainage pipe is provided below the side of the drainage pipe away from the water storage tank. The diversion mechanism is used to discharge rainwater B to the drainage pipe and discharge rainwater B1 to the filtration mechanism of the filter box.

[0009] By adopting the above technical solution, during use, the hose is connected to the external roof drain pipe, and the connecting pipe is connected to the external municipal sewer pipe. During rainfall, the initial rainwater B enters the diversion mechanism through the hose, and the diversion mechanism discharges rainwater B into the drainage pipe. The rainwater in the drainage pipe is then discharged into the municipal sewer pipe through the connecting pipe. As rainfall continues, subsequent rainwater B1 enters the diversion mechanism through the hose and is discharged into the filtration mechanism of the filter box. The filtration mechanism filters the rainwater B1, and the filtered rainwater flows into the purification mechanism. After purification, it is discharged into the storage tank for storage. This achieves the treatment of subsequent water pollution and only treats rainwater B1, thereby reducing the time required for the rainwater collection and purification device to treat rainwater. It is simple and convenient to use.

[0010] Preferably, the diversion mechanism includes a guide pipe and a connecting pipe. The connecting pipe is located on one side of the filter box, with one end passing through the filter box wall and inside the filter box. The flexible hose is installed on the connecting pipe and communicates with the opening of the connecting pipe outside the filter box. The guide pipe is L-shaped and rotatably connected to the opening of the connecting pipe inside the filter box, communicating with the connecting pipe. The top of the drainage pipe is provided with a U-shaped baffle communicating with the drainage pipe. The guide pipe is located above the filter mechanism, with the end of the guide pipe away from the connecting pipe facing the baffle and flush with the side of the filter box where the drainage pipe is located. The bottom end of the guide pipe contacts the top of the filter box. The filter box is provided with a drive unit for driving the guide pipe to rotate on the connecting pipe. The connecting pipe is provided with a turbidity meter and a flow meter. The turbidity meter is used to detect the turbidity of the rainwater in the connecting pipe, and the flow meter is used to detect whether there is rainwater flowing in the connecting pipe.

[0011] Preferably, the driving component includes a gear ring coaxially disposed on the outer wall of the guide pipe near one end of the connecting pipe, a first motor is provided on the filter box near one end of the connecting pipe, and a gear meshing with the gear ring is provided on one end of the rotating shaft of the first motor, and both the turbidity meter and the flow meter control the operation of the first motor.

[0012] Preferably, the filtration mechanism includes a base plate and a U-shaped surrounding plate disposed at the top of the base plate. A filter plate is disposed between opposite sides of the surrounding plate, with the filter plate close to the opening of the surrounding plate. The bottom end of the filter plate contacts the top end of the base plate. The surrounding plate, the filter plate, and the base plate form a filter box, with the opening of the filter box facing upwards. The filter box is horizontally disposed between opposite sides inside the filter box, and is located below the guide pipe. A box body is disposed at the opening of the surrounding plate, and the box body closes the opening of the surrounding plate. The opening of the box body faces the purification mechanism, and the opening of the box body is closed by a sealing plate. A transition pipe communicating with the box body is disposed on the sealing plate, and the transition pipe is communicating with the purification mechanism. Several guide holes are opened at the bottom of the box body near the filter plate.

[0013] Preferably, the purification mechanism includes a transition box and a purification box horizontally arranged between opposite sides inside the filter box. Both the transition box and the purification box are located on the right side of the filter box and are arranged sequentially from left to right. The opening of the transition box faces upward. The end of the transition pipe away from the filter box passes through the wall of the transition box and is located inside the transition box. The bottom end of the transition box is connected to the upper side of one side of the purification box through a water pump. The water pump is installed on the water pump. The opening of the purification box faces downward and is connected to a water storage tank. The inner wall of the purification box is provided with an anthracite filter layer, a natural mineral stone filter layer, and an activated carbon adsorption layer sequentially from top to bottom.

[0014] Preferably, the filter box is provided with a rinsing mechanism for backwashing the filter plate through a guide pipe.

[0015] Preferably, the rinsing mechanism includes a connecting groove on the side of the transition box near the filter box, and the connecting groove is connected to the top of the transition box. The end of the transition pipe away from the filter box passes through the connecting groove. The filter box is rotatably connected between opposite sides inside the filter box. The filter box is equipped with a second motor for driving the filter box to rotate inside the filter box. The water storage tank is equipped with a water level sensor for detecting the water level in the water storage tank. The water level sensor controls the second motor to work. When the rotating shaft of the second motor drives the filter box to rotate 90 degrees counterclockwise, the rainwater B1 discharged from the guide pipe into the filter box enters the transition pipe. A rectangular groove is opened on the bottom of the box body away from the transition pipe. The bottom surface of the box body is a first inclined surface, and the lowest end of the first inclined surface is close to the rectangular groove.

[0016] Preferably, the side of the enclosure opposite to the filter plate is a second inclined surface. The filter plate is inclined, and the end of the filter plate away from the bottom plate is inclined inward into the enclosure. The inclined filter plate is parallel to the second inclined surface on the enclosure. The filter box is provided with a drain hole communicating with the drain pipe on the side below it. A partition is provided between the opposite sides of the filter box. The partition is located below the transition box, and the bottom end of the partition is fixedly connected to the bottom end of the filter box.

[0017] Preferably, the partition has a right-angled triangular guide plate on the side near the drain hole, and the guide plate is located below the filter box. The inclined surface of the guide plate faces upward, and the lowest end of the inclined surface of the guide plate is close to the drain hole.

[0018] Preferably, the top of the filter box is hinged with a cover plate, which is used to close the opening of the filter box. The cover plate is provided with a housing that communicates with the filter box. When the cover plate closes the opening of the filter box, the guide pipe, gear and gear ring are all located in the housing.

[0019] The beneficial effects of this invention are as follows: In use, the hose is connected to the drainage pipe of the roof, and the connecting pipe is connected to the municipal sewer pipe. During rainfall, the initial rainwater B enters the diversion mechanism through the hose and is discharged into the drainage pipe. The rainwater in the drainage pipe is then discharged into the municipal sewer pipe through the connecting pipe. As rainfall continues, subsequent rainwater B1 enters the diversion mechanism through the hose and is discharged into the filtration mechanism of the filter box. The filtration mechanism filters the rainwater B1, and the filtered rainwater flows into the purification mechanism. After purification, it is discharged into the storage tank for storage. This achieves the goal of treating only rainwater B1, thereby reducing the time required for rainwater collection and purification devices to process rainwater. It is simple and convenient to use. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of this embodiment;

[0022] Figure 2 This is a structural schematic diagram illustrating the partition in this embodiment;

[0023] Figure 3 This is a schematic diagram illustrating the structure of the drainage hole in this embodiment;

[0024] Figure 4 for Figure 1 Enlarged structural diagram of section A in the middle;

[0025] Figure 5 This is a schematic diagram illustrating the structure of the connecting groove in this embodiment;

[0026] Figure 6 This is a structural diagram illustrating the box in this embodiment;

[0027] Figure 7 This is a structural schematic diagram illustrating the first inclined surface in this embodiment;

[0028] Figure 8 This is a schematic diagram of the filter plate during rinsing.

[0029] Explanation of reference numerals in the attached figures:

[0030] In the diagram: 1. Water storage tank; 2. Filter box; 3. Hose; 4. Outlet pipe; 5. Drainage pipe; 6. Connecting pipe; 7. Guide pipe; 8. Connecting pipe; 9. Baffle; 10. Turbidity meter; 12. Flow meter; 13. Gear ring; 14. First motor; 15. Gear; 16. Base plate; 17. Enclosure plate; 18. Filter plate; 19. Filter box; 20. Box body; 21. Sealing plate; 22. Transition pipe; 23. Guide pipe 24. Hole; 25. Transition box; 26. Purification box; 27. Water pump; 28. Anthracite filter layer; 29. ​​Natural mineral stone filter layer; 30. Activated carbon adsorption layer; 31. Connecting groove; 32. Second motor; 33. Water level sensor; 34. Second inclined surface; 35. Drain hole; 36. Partition plate; 37. Guide plate; 38. Cover plate; 39. Housing; 40. Rectangular groove; 41. First inclined surface. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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.

[0032] A rainwater harvesting and purification device for green buildings includes a water storage tank 1 and a filter box 2 installed on the water storage tank 1. The filter box 2 is connected to the roof drain pipe via a hose 3. Figure 1 and Figure 2 It also includes a filtration mechanism, which is installed in the filter box 2 to filter rainwater;

[0033] The purification mechanism is installed in the filter box 2 to purify the rainwater that has passed through the filter mechanism. The purification mechanism is connected to the water storage tank 1, and a water outlet pipe 4 is provided on the lower side of one side of the water storage tank 1.

[0034] The diversion mechanism is installed on the filter box 2 and connected to the hose 3. The water storage tank 1 and the filter box 2 are vertically provided with a drain pipe 5 on one side, and the drain pipe 5 is provided with a connecting pipe 6 connected to the drain pipe 5 on the side away from the water storage tank 1. The diversion mechanism is used to discharge rainwater B to the drain pipe 5 and discharge rainwater B1 to the filter mechanism of the filter box 2.

[0035] like Figure 1 and Figure 2 In use, connect hose 3 to the external roof drain pipe and connect connecting pipe 6 to the external municipal sewer pipe. During rainfall, the initial rainwater B will enter the diversion mechanism through hose 3 and be discharged to the drainage pipe 5. The rainwater in the drainage pipe 5 will then be discharged to the municipal sewer pipe through connecting pipe 6. As the rainfall continues, the subsequent rainwater B1 will enter the diversion mechanism through hose 3 and be discharged to the filtration mechanism of filter box 2. The filtration mechanism will filter the rainwater B1 and then flow into the purification mechanism. After purification, the rainwater will be discharged into the storage tank 1 for storage. This allows for the treatment of only rainwater B1, thereby reducing the time required for the rainwater collection and purification device to process the rainwater. It is simple and convenient to use.

[0036] like Figure 1 and Figure 3 and Figure 4 The diversion mechanism includes a guide pipe 7 and a connecting pipe 8. The connecting pipe 8 is located on one side of the filter box 2, with one end passing through the wall of the filter box 2 and located inside the filter box 2. A flexible hose 3 is installed on the connecting pipe 8 and communicates with the opening of the connecting pipe 8 outside the filter box 2. The guide pipe 7 is L-shaped and is rotatably connected to the opening of the connecting pipe 8 inside the filter box 2 and communicates with the connecting pipe 8. The top of the drain pipe 5 is provided with a U-shaped baffle 9 that communicates with the drain pipe 5. The guide pipe 7 is located above the filter mechanism, with the end of the guide pipe 7 away from the connecting pipe 8 facing the baffle 9 and flush with the side of the filter box 2 where the drain pipe 5 is located. The bottom end of the flow tube 7 contacts the top end of the filter box 2. The filter box 2 is equipped with a driving component for driving the flow tube 7 to rotate on the connecting pipe 8. The connecting pipe 8 is equipped with a turbidity meter 10 and a flow meter 12. The turbidity meter 10 is used to detect the turbidity of the rainwater in the connecting pipe 8, and the flow meter 12 is used to detect whether there is rainwater flowing in the connecting pipe 8. The driving component includes a gear ring 13 coaxially set on the outer wall of the flow tube 7 near one end of the connecting pipe 8. The filter box 2 is equipped with a first motor 14 near one end of the connecting pipe 8, and one end of the rotating shaft of the first motor 14 is equipped with a gear 15 that meshes with the gear ring 13. Both the turbidity meter 10 and the flow meter 12 control the operation of the first motor 14.

[0037] like Figure 1 and Figure 3 and Figure 4The initial position of the guide pipe 7 is when the end of the guide pipe 7 furthest from the connecting pipe 8 faces the baffle 9. During rainfall, the initial rainwater B flows from the hose 3 through the connecting pipe 8 and the guide pipe 7 into the baffle 9. The rainwater flowing into the baffle 9 is then affected by gravity and enters the drainage pipe 5, and then flows through the connecting pipe 6 to the municipal sewer. During this process, the turbidity of the rainwater in the connecting pipe 8 is detected by the turbidity meter 10. As the rainfall continues, when the turbidity of the rainwater detected by the turbidity meter 10 decreases to the required value, the rainwater flowing in the guide pipe 7 is the rainwater B1 that needs to be collected. At this time, the turbidity meter 10 controls the first motor 14 to work. The rotating shaft of the first motor 14 drives the gear 15 to rotate. The gear 15, through the meshing gear ring 13, drives the guide pipe 7 to rotate counterclockwise on the connecting pipe 8 until the end of the guide pipe 7 away from the connecting pipe 8 is facing downwards. At this time, the rainwater B1 discharged from the guide pipe 7 will be discharged into the filtration mechanism of the filter box 2. Through the above process, rainwater B can be discharged into the drainage pipe 5 and rainwater B1 can be discharged into the filtration mechanism of the filter box 2. When the rainfall stops, the flow meter 12 detects that the water flow in the connecting pipe 8 has disappeared. At this time, the flow meter 12 will control the first motor 14 to work, so that the guide pipe 7 can be rotated back to the initial position. It is simple and convenient to use.

[0038] like Figure 1 and Figure 2 and Figure 3 and Figure 5 and Figure 6 The filtration mechanism includes a base plate 16 and a U-shaped surrounding plate 17 disposed at the top of the base plate 16. A filter plate 18 is disposed between opposite sides of the surrounding plate 17, and the filter plate 18 is close to the opening of the surrounding plate 17. The bottom end of the filter plate 18 contacts the top end of the base plate 16. The surrounding plate 17, the filter plate 18, and the base plate 16 form a filter box 19, and the opening of the filter box 19 faces upward. The filter box 19 is horizontally disposed between opposite sides inside the filter box 2, and the filter box 19 is located below the guide pipe 7. A box body 20 is disposed at the opening of the surrounding plate 17, and the box body 20 closes the opening of the surrounding plate 17. The opening of the box body 20 faces the purification mechanism, and the opening of the box body 20 is closed by a sealing plate 21. A transition pipe 22 communicating with the box body 20 is disposed on the sealing plate 21, and the transition pipe 22 is communicating with the purification mechanism. Several guide holes 23 are opened on the bottom of the box body 20 near the filter plate 18.

[0039] like Figure 1 and Figure 2 and Figure 3 and Figure 5 and Figure 6When the rainwater flowing through the guide pipe 7 is rainwater B1, the turbidity meter 10 controls the first motor 14 to work, so that when the end of the guide pipe 7 away from the connecting pipe 8 is facing downward, the rainwater B1 discharged from the guide pipe 7 will be discharged into the filter box 19. After being filtered by the filter plate 18 in the filter box 19, it flows into the box body 20 through the guide hole 23, and then flows into the purification mechanism through the transition pipe 22 on the closed plate 21. The impurities filtered out by the filter plate 18 remain in the filter box 19, which is simple and convenient to use.

[0040] like Figure 2 The purification mechanism includes a transition box 24 and a purification box 25 horizontally arranged between opposite sides inside the filter box 2. Both the transition box 24 and the purification box 25 are located to the right of the filter box 19, and are arranged sequentially from left to right. The opening of the transition box 24 faces upwards. The end of the transition pipe 22 away from the filter box 19 passes through the wall of the transition box 24 and is located within the transition box 24. The bottom end of the transition box 24 is connected to the upper side of one side of the purification box 25 via a water pump 26, and the water pump 27 is installed on the water pump 26. The opening of the purification box 25 faces downwards and is connected to the water storage tank 1. The inner wall of the purification box 25 is decorated with... The system consists of a smokeless coal filter layer 28, a natural mineral stone filter layer 29, and an activated carbon adsorption layer 30 arranged sequentially below. The purpose of this arrangement is to allow rainwater flowing from the transition pipe 22 to enter the transition box 24. Then, the water pump 27 is turned on and the filtered rainwater in the transition box 24 is pumped through the water pumping pipe 26 to the smokeless coal filter layer 28 in the purification box 25. The filtered rainwater is then purified by the smokeless coal filter layer 28, the natural mineral stone filter layer 29, and the activated carbon adsorption layer 30 arranged sequentially from top to bottom. The purified rainwater then flows from the opening of the purification box 25 into the water storage tank 1 for storage. The system is simple and convenient to use.

[0041] like Figure 1 The filter box 2 is equipped with a flushing mechanism for backwashing the filter plate 18 through the guide pipe 7. The purpose of this setting is that, due to the continuous rainfall in rainy days, the subsequent rainwater B1 will become cleaner and cleaner. When the rainwater storage tank 1 is full, the rainwater B1 flowing out from the guide pipe 7 backwashes the filter plate 18 through the flushing mechanism, reducing the need for manual cleaning of the filter plate 18 and making it simple and convenient to use.

[0042] like Figure 2 and Figure 3 and Figure 5 and Figure 6 and Figure 7The rinsing mechanism includes a connecting groove 31 on the side of the transition box 24 near the filter box 19, and the connecting groove 31 is connected to the top of the transition box 24. The end of the transition pipe 22 away from the filter box 19 passes through the connecting groove 31. The filter box 19 is rotatably connected between the opposite sides inside the filter box 2. The filter box 2 is equipped with a second motor 32 for driving the filter box 19 to rotate inside the filter box 2. The water storage tank 1 is equipped with a water level sensor 33 for detecting the water level in the water storage tank 1. The water level sensor 33 controls the second motor 32 to work. When the rotating shaft of the second motor 32 drives the filter box 2 to rotate 90 degrees counterclockwise, the rainwater B1 discharged from the guide pipe 7 into the filter box 2 enters the transition pipe 22. A rectangular groove 40 is opened on the bottom of the box body 20 away from the transition pipe 22. The bottom surface of the box body 20 is a first inclined surface 41, and the lowest end of the first inclined surface 41 is close to the rectangular groove 40.

[0043] like Figure 2 and Figure 3 and Figure 5 and Figure 6 and Figure 7 When the opening of the filter box 19 faces upwards, it is in its initial position. At this time, the end of the transition pipe 22 away from the filter box 19 is located in the transition box 24 through the connecting groove 31. When the water level sensor 33 detects that the rainwater in the water storage tank 1 is full, the water level sensor 33 controls the second motor 32 to work, causing the filter box 19 to rotate 90 degrees counterclockwise upwards. At this time, the transition pipe 22 will be aligned with the guide pipe 7, and the rainwater B1 will flow from the guide pipe 7 through the transition pipe 22 into the box body 20, and then flow downwards from the rectangular groove 40 and each guide hole 23 on the box body 20 to the filter plate 18. At this time, the rainwater B1 flowing downwards from the rectangular groove 40 and each guide hole 23 to the filter plate 18 can perform reverse rinsing of the filter plate 18 (e.g., Figure 8 This reduces the need for manual cleaning of filter plate 18;

[0044] After the filter plate 18 has been backwashed for a certain period of time (the backwashing time can be 10 minutes or 20 minutes, etc.), the water level sensor 33 controls the second motor 32 to work again, so that the filter box 19 continues to rotate counterclockwise until the transition pipe 22 and the guide pipe 7 are misaligned, and then the second motor 32 stops working.

[0045] When the rainwater in the water storage tank 1 drops by one-third or two-thirds as the water level drops, the water level sensor 33 controls the second motor 32 to work, causing the filter box 19 to rotate clockwise back to its initial position, so as to filter the rainwater during the next rainfall. It is simple and convenient to use.

[0046] like Figure 2 and Figure 3 and Figure 5The side of the enclosure 17 opposite to the filter plate 18 is a second inclined surface 34. The filter plate 18 is inclined, and the end of the filter plate 18 away from the bottom plate 16 is inclined inward towards the enclosure 17. The inclined filter plate 18 is parallel to the second inclined surface 34 on the enclosure 17. The filter box 2 is provided with a drain hole 35 connected to the drain pipe 5 on the side below it. A partition 36 is provided between the opposite sides of the filter box 2. The partition 36 is located below the transition box 24, and the bottom end of the partition 36 is fixedly connected to the bottom end of the filter box 2. The purpose of this arrangement is that when the transition pipe 22 is aligned with the guide pipe 7, the impurities in the filter box 19 will slide or roll out of the filter box 19 along the second inclined surface 34 of the enclosure 17. At the same time, rainwater B1 flows down from the rectangular groove 40 on the box body 20 and each guide hole 23 to the filter plate 18 to backwash the filter plate 18 (e.g., Figure 8 During the backwashing process, because the filter plate 18 is inclined and the filter plate 18 is parallel to the second inclined surface 34 of the enclosure plate 17, even if the rainwater B1 carries impurities during the washing process, the impurities will slide or roll off the filter plate 18 along the inclined filter plate 18.

[0047] The inner diameter of the guide pipe is G, and the diameter of the guide hole 23 is 0.3G or 0.4G. During the rinsing process of the filter plate 18, the interception of impurities carried by the rainwater B1 by the guide hole 23 is reduced. Even if impurities are intercepted by the guide hole 23 during the rinsing process of the filter plate 18, the impurities intercepted in the box 20 will slide towards the rectangular groove 40 through the first inclined surface 41 on the box 20 or follow the water flow until they are discharged from the box 40 through the rectangular groove 40.

[0048] Rainwater after rinsing the filter plate 18 falls onto the side of the partition 36 below the filter box 19 in the filter box 2, and flows into the drainage pipe 5 through the drain hole 35. Then it is discharged into the municipal sewer pipe through the connecting pipe 6 of the drainage pipe 5. At this time, the rainwater after rinsing the filter plate 18 can flush the drainage pipe 5, which is simple and convenient to use.

[0049] like Figure 3 A right-angled triangular guide plate 37 is provided on the side of the partition 36 near the drain hole 35, and the guide plate 37 is located below the filter box 19. The inclined surface of the guide plate 37 faces upward, and the lowest end of the inclined surface of the guide plate 37 is close to the drain hole 35. The purpose of this setting is that the rainwater after rinsing the filter plate 18 falls onto the guide plate 37 on the side of the partition 36. At this time, the rainwater after rinsing the filter plate 18 can easily flow into the drain pipe 5 through the drain hole 35 via the guide plate 37. It is simple and convenient to use.

[0050] like Figure 1The top of the filter box 2 is hinged with a cover plate 38, which is used to close the opening of the filter box 2. The cover plate 38 is provided with a housing 39 that communicates with the filter box 2. When the cover plate 38 closes the opening of the filter box 2, the guide pipe 7, the gear 15, and the gear ring 13 are all located in the housing 39. The purpose of this arrangement is to reduce the occurrence of external dust or impurities entering the filter box 2 from the opening when the device is idle by closing the opening of the filter box 2 with the cover plate 38. When the cover plate 38 closes the opening of the filter box 2, the housing 39 will not affect the rotation of the guide pipe 7.

[0051] The working process of this device is as follows:

[0052] In the first step, during rainfall, the initial rainwater B flows from the hose 3 through the connecting pipe 8 and the guide pipe 7 into the baffle 9. The rainwater flowing into the baffle 9 is then affected by gravity and enters the drainage pipe 5. After that, it is discharged into the municipal sewer pipe through the connecting pipe 6. When the rainwater flows through the connecting pipe 8, the turbidity meter 10 detects the turbidity of the rainwater in the connecting pipe 8.

[0053] The second step is that as the rainfall continues, the turbidity of the rainwater detected by the turbidimeter 10 decreases to the required value. At this time, the rainwater in the guide pipe 7 is rainwater B1. The turbidimeter 10 controls the first motor 14 to work. The rotating shaft of the first motor 14 drives the gear 15 to rotate. The gear 15 drives the guide pipe 7 to rotate counterclockwise on the connecting pipe 8 through the gear ring 13 that meshes with it, until the end of the guide pipe 7 away from the connecting pipe 8 is facing down. At this time, the rainwater B1 discharged from the guide pipe 7 will be discharged into the filter box 19.

[0054] Third, the rainwater B1 discharged into the filter box 19 is filtered by the filter plate 18 in the filter box 19 and flows into the box body 20 through the guide hole 23. Then it flows into the transition box 24 through the transition pipe 22 on the sealing plate 21. The impurities filtered out by the filter plate 18 remain in the filter box 19.

[0055] Fourth, turn on the water pump 27 and pump the filtered rainwater in the transition box 24 through the water pumping pipe 26 to the top of the anthracite filter layer 28 in the purification box 25. Then, the filtered rainwater is purified by passing through the anthracite filter layer 28, the natural mineral stone filter layer 29, and the activated carbon adsorption layer 30 arranged from top to bottom. The purified rainwater flows into the water storage tank 1 from the opening of the purification box 25 for storage.

[0056] Fifth step: When the water level sensor 33 detects that the rainwater in the water storage tank 1 is full, the water level sensor 33 controls the second motor 32 to work, so that the filter box 19 rotates 90 degrees counterclockwise. At this time, the transition pipe 22 will be aligned with the guide pipe 7. The rainwater B1 flowing out from the guide pipe 7 will be discharged into the box body 20 through the transition pipe 22 and then flow down to the filter plate 18 from the various guide holes 23 on the box body 20. At this time, the rainwater B1 flowing down to the filter plate 18 from the guide holes 23 can reverse the rinsing of the filter plate 18. During the rinsing of the filter plate 18, the impurities in the filter box 19 will be entered into the filter box 19 by gravity and the water when rinsing the filter plate 18, and will slide out, roll out or be washed out from the filter box 19 along the second inclined surface 34 of the surrounding plate 17.

[0057] Step 6: After the filter plate 18 has been backwashed for a certain period of time, the water level sensor 33 controls the second motor 32 to work again, so that the filter box 19 continues to rotate counterclockwise until the transition pipe 22 and the guide pipe 7 are completely misaligned. Then the second motor 32 stops working. During the process of the transition pipe 22 and the guide pipe 7 being misaligned, the tilt angle of the filter plate 18 increases, allowing rainwater to enter the box 20 from the transition pipe 22 to wash the filter plate 18, thus improving the cleaning effect of the filter plate 18. When the transition pipe 22 and the guide pipe 7 are completely misaligned, the rainwater will stop entering the transition pipe 22, reducing the occurrence of rainwater continuously washing the filter plate 18 after the water storage tank 1 is full, which would affect the service life of the filter plate 18.

[0058] Step 7: When the rainfall stops, the flow meter 12 detects that the water flow in the connecting pipe 8 has disappeared. At this time, the flow meter 12 will control the first motor 14 to work, so that the guide pipe 7 will rotate back to the initial position.

[0059] Step 8: When the rainwater in the water storage tank 1 drops by one-third or two-thirds as the water level drops, the water level sensor 33 controls the second motor 32 to work, so that the filter box 19 rotates clockwise back to the initial position to facilitate the filtration of rainwater during the next rainfall.

[0060] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A rainwater collection and purification device for green buildings, comprising a water storage tank (1) and a filter box (2) disposed on the water storage tank (1), wherein the filter box (2) is connected to a roof drain pipe via a flexible hose (3), characterized in that, It also includes a filtration mechanism, which is installed in the filter box (2) for filtering rainwater; The purification mechanism is installed in the filter box (2) to purify the rainwater that has passed through the filter mechanism. The purification mechanism is connected to the water storage tank (1). A water outlet pipe (4) is provided on one side of the water storage tank (1). The diversion mechanism is installed on the filter box (2) and connected to the hose (3). The water storage tank (1) and the filter box (2) are vertically provided with a drain pipe (5) on one side. The drain pipe (5) is provided with a connecting pipe (6) connected to the drain pipe (5) on the side away from the water storage tank (1). The diversion mechanism is used to discharge rainwater B to the drain pipe (5) and discharge rainwater B1 to the filter mechanism of the filter box (2). The diversion mechanism includes a guide pipe (7) and a connecting pipe (8); The filtration mechanism includes a surrounding plate (17), a filter plate (18), and a bottom plate (16) forming a filter box (19). The opening of the surrounding plate (17) is provided with a box body (20), and the box opening of the box body (20) is closed by a sealing plate (21). The sealing plate (21) is provided with a transition pipe (22) that communicates with the box body (20). The purification mechanism includes a transition box (24) and a purification box (25) horizontally arranged between opposite sides inside the filter box (2); The filter box (2) is provided with a rinsing mechanism for backwashing the filter plate (18) through the guide pipe (7); The rinsing mechanism includes a connecting groove (31) on the side of the transition box (24) near the filter box (19), and the connecting groove (31) is connected to the top of the transition box (24). The end of the transition pipe (22) away from the filter box (19) passes through the connecting groove (31). The filter box (19) is rotatably connected between opposite sides inside the filter box (2), and the filter box (2) is provided with a second motor (32) for driving the filter box (19) to rotate inside the filter box (2). The water storage tank (1) is provided with a device for detecting the water storage tank (19). 1) Water level sensor (33) of medium water level, the water level sensor (33) controls the second motor (32) to work. When the rotating shaft of the second motor (32) drives the filter box (2) to rotate 90 degrees counterclockwise, the rainwater B1 discharged from the guide pipe (7) into the filter box (2) enters the transition pipe (22). The bottom of the box body (20) is provided with a rectangular groove (40) on the side away from the transition pipe (22). The bottom surface of the box body (20) is the first inclined surface (41), and the lowest end of the first inclined surface (41) is close to the rectangular groove (40).

2. The rainwater collection and purification device for green buildings as described in claim 1, characterized in that, The connecting pipe (8) is located on one side of the filter box (2), and one end of the connecting pipe (8) passes through the wall of the filter box (2) and is located inside the filter box (2). The flexible hose (3) is located on the connecting pipe (8) and communicates with the opening of the connecting pipe (8) outside the filter box (2). The guide pipe (7) is L-shaped and is rotatably connected to the opening of the connecting pipe (8) inside the filter box (2) and communicates with the connecting pipe (8). The top of the drain pipe (5) is provided with a U-shaped baffle (9) that communicates with the drain pipe (5). The guide pipe (7) is located in the filter mechanism. Above, and the end of the guide pipe (7) away from the connecting pipe (8) faces the baffle (9) and is flush with the side of the filter box (2) where the drainage pipe (5) is provided. The bottom end of the guide pipe (7) is in contact with the top of the filter box (2). The filter box (2) is provided with a drive unit for driving the guide pipe (7) to rotate on the connecting pipe (8). The connecting pipe (8) is provided with a turbidity meter (10) and a flow meter (12). The turbidity meter (10) is used to detect the turbidity of the rainwater in the connecting pipe (8), and the flow meter (12) is used to detect whether there is rainwater flowing in the connecting pipe (8).

3. The rainwater collection and purification device for green buildings as described in claim 2, characterized in that, The driving component includes a gear ring (13) coaxially disposed on the outer wall of the guide pipe (7) near one end of the connecting pipe (8). The filter box (2) is provided with a first motor (14) near one end of the connecting pipe (8), and one end of the rotating shaft of the first motor (14) is provided with a gear (15) that meshes with the gear ring (13). The turbidity meter (10) and the flow meter (12) both control the first motor (14) to work.

4. A rainwater collection and purification device for green buildings as described in claim 2, characterized in that, The enclosure (17) is set at the top of the base plate (16) and is U-shaped. The filter plate (18) is set between the opposite sides of the enclosure (17) and is close to the opening of the enclosure (17). The bottom end of the filter plate (18) is in contact with the top end of the base plate (16). The opening of the filter box (19) faces upward. The filter box (19) is set horizontally between the opposite sides inside the filter box (2) and is located below the guide pipe (7). The box body (20) closes the opening of the enclosure (17). The opening of the box body (20) faces the purification mechanism. The transition pipe (22) is connected to the purification mechanism. The bottom of the box body (20) near the filter plate (18) is provided with several guide holes (23).

5. A rainwater collection and purification device for green buildings as described in claim 4, characterized in that, The transition box (24) and the purification box (25) are both located on the right side of the filter box (19), and the transition box (24) and the purification box (25) are arranged from left to right. The opening of the transition box (24) faces upward. The end of the transition pipe (22) away from the filter box (19) passes through the box wall of the transition box (24) and is located in the transition box (24). The bottom end of the transition box (24) is connected to the upper side of the purification box (25) through a water pump (26), and a water pump (27) is provided on the water pump (26). The opening of the purification box (25) faces downward and is connected to the water storage tank (1). The inner wall of the purification box (25) is provided with anthracite filter layer (28), natural mineral stone filter layer (29), and activated carbon adsorption layer (30) from top to bottom.

6. A rainwater collection and purification device for green buildings as described in claim 5, characterized in that, The side of the enclosure (17) opposite to the filter plate (18) is a second inclined surface (34). The filter plate (18) is inclined, and the end of the filter plate (18) away from the bottom plate (16) is inclined into the enclosure (17). The inclined filter plate (18) is parallel to the second inclined surface (34) on the enclosure (17). The filter box (2) is provided with a drain hole (35) connected to the drain pipe (5) on the side below it. A partition (36) is provided between the opposite sides of the filter box (2). The partition (36) is located below the transition box (24), and the bottom end of the partition (36) is fixedly connected to the bottom end of the filter box (2).

7. A rainwater collection and purification device for green buildings as described in claim 6, characterized in that, The partition (36) has a right-angled triangular guide plate (37) on the side near the drain hole (35), and the guide plate (37) is located below the filter box (19). The inclined surface of the guide plate (37) faces upward, and the lowest end of the inclined surface of the guide plate (37) is close to the drain hole (35).

8. A rainwater collection and purification device for green buildings as described in claim 3, characterized in that, The top of the filter box (2) is hinged with a cover plate (38), and the cover plate (38) is used to close the opening of the filter box (2). The cover plate (38) is provided with a cover (39) that communicates with the filter box (2). When the cover plate (38) closes the opening of the filter box (2), the guide pipe (7), the gear (15), and the gear ring (13) are all located in the cover (39).

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