A rainwater harvesting and utilization system for vertical green buildings

Abstract

This application provides a rainwater harvesting and utilization system for vertical greening buildings, relating to the field of green building. It includes a downpipe and a water storage tank embedded in the base of the building. One end of the downpipe connects to the top of the building, and the other end of the downpipe has a first branch pipe and a second branch pipe. One end of the first branch pipe connects to the downpipe, and the other end has a detachable sealing cap. One end of the second branch pipe connects to the downpipe, and the other end supplies rainwater to the water storage tank. The second branch pipe is equipped with a filter mechanism for filtering rainwater. The water storage tank contains a water pump and a sprinkler pipe. The water pump pumps the rainwater from the storage tank through the sprinkler pipe for watering the plants. This application has the effect of collecting and reusing rainwater without causing silt accumulation and clogging.

Description

Technical Field

[0001] This application relates to the field of green building, and in particular to a rainwater harvesting and utilization system for vertical green buildings. Background Technology

[0002] With economic development, there are more and more high-rise buildings in cities, and they are being built more and more densely. Although there are green areas set up along roadsides or in parks in cities, due to the fast pace of life, most people live a life of going back and forth between two points and rarely come into contact with green plants.

[0003] Currently, in order to increase the greening rate of buildings, planting pots are installed on the facades of buildings and plants are planted in the pots or climbing plants are selected to form vertical greening, which can enrich the spatial structure and layering of urban landscaping and enhance the three-dimensional landscape art effect of the city.

[0004] In existing technologies, dedicated rainwater harvesting systems are generally used to collect rainwater and then use the collected rainwater to irrigate the plants in vertical green buildings. However, existing rainwater harvesting systems do not filter the rainwater before storing or irrigating, which can easily cause excessive sediment to accumulate in the storage devices or planting pots, thus affecting the rainwater harvesting effect and also having an adverse impact on the survival rate of plants. Summary of the Invention

[0005] In order to improve the problem of mud and sand accumulation and blockage during the collection and storage of rainwater, this application provides a rainwater harvesting and utilization system for vertical green buildings.

[0006] This application provides a rainwater harvesting and utilization system for vertical greening buildings, employing the following technical solution:

[0007] A rainwater harvesting and utilization system for vertical greening buildings includes a downpipe and a water storage tank embedded in the bottom of the building. One end of the downpipe is connected to the top of the building, and the other end of the downpipe is provided with a first branch pipe and a second branch pipe. One end of the first branch pipe is connected to the downpipe, and the other end is provided with a detachable sealing cap. One end of the second branch pipe is connected to the downpipe, and the other end delivers rainwater to the water storage tank. The second branch pipe is provided with a filter mechanism for filtering rainwater. The water storage tank is provided with a water pump and a sprinkler pipe. The water pump pumps the rainwater in the water storage tank out through the sprinkler pipe and uses it for watering the plants.

[0008] By adopting the above technical solution, rainwater is collected in the downpipe and flows into the storage tank through the second branch pipe. Because the second branch pipe is equipped with a filter, the rainwater is filtered before entering the storage tank, effectively preventing the accumulation of mud and sand carried in the rainwater. Furthermore, by opening the sealing cap on the first branch pipe, mud and sand in both the downpipe and the second branch pipe can be cleaned.

[0009] Optionally, a number of planting pots are arranged vertically at intervals on the exterior facade of the building, and the plants are planted in the planting pots. One end of the spray pipe is connected to the water pump, and the other end of the spray pipe is located in the planting pot and sprays water toward the roots of the plants.

[0010] By adopting the above technical solution, the filtration effect and filtration speed are improved by utilizing the gravity of rainwater, and the filtered rainwater is then used for watering plants, thus realizing the collection and utilization of rainwater.

[0011] Optionally, the outer wall of the spray pipe is provided with a plurality of spray holes, which are located on the inner side of the planting pot and spaced apart along the length of the planting pot.

[0012] By adopting the above technical solution, the part of the sprinkler pipe located inside the planting pot extends along the length of the planting pot, which can improve the uniformity of watering the plants and thus improve the watering effect.

[0013] Optionally, the filtration mechanism includes a clamping plate and a connecting pipe. The clamping plate is U-shaped. One side of the clamping plate is connected to the end of the second branch pipe near the water storage tank, and the other side of the clamping plate is connected to one end of the connecting pipe. The other end of the connecting pipe is connected to the water storage tank. Each side of the clamping plate has a through hole. One through hole is connected to the second branch pipe, and the other through hole is connected to the connecting pipe. A filter assembly is clamped inside the clamping plate, and the filter assembly is in communication with the two through holes.

[0014] By adopting the above technical solution, the filter assembly can be reliably fixed under the clamping action of the U-shaped clamps without affecting the flow of rainwater, thereby achieving the function of filtering rainwater. When the filtration performance of the filter assembly is insufficient, the filter assembly can be quickly replaced.

[0015] Optionally, a convex ring is provided on the outer edge of the second branch pipe near the clamping plate and the outer edge of the connecting pipe near the clamping plate. A connecting ring is provided on both outer walls of the clamping plate. One of the convex rings is connected to a corresponding connecting ring and fixed by a fixing bolt.

[0016] By adopting the above technical solution, a reliable connection between the clamp plate and the second branch pipe and between the clamp plate and the connecting pipe can be achieved, thereby ensuring that the filter assembly can be reliably installed on the inside of the clamp plate and reliably filter rainwater.

[0017] Optionally, the filter assembly includes a substrate and a filter plate. The substrate has a mounting hole, which is coaxially arranged with the perforation. The inner diameter of the mounting hole is not less than the inner diameter of the perforation. The filter plate is detachably disposed in the mounting hole, and the sidewall of the substrate is fitted with the inner wall of the clamping plate.

[0018] By adopting the above technical solution, after the outer wall of the substrate and the inner wall of the clamp are attached, rainwater will not leak from the joint between the substrate and the clamp, but will all enter the mounting hole and be filtered by the filter plate, and then enter the water storage tank through the connecting pipe.

[0019] Optionally, a limiting strip is provided on the inner walls of both sides of the clamping plate. The two limiting strips are separated from each other in the horizontal direction. The limiting strips are close to the curved part of the clamping plate. The bottom of the base plate is in contact with the two limiting strips. An adjusting bolt is provided above the clamping plate. The adjusting bolt is located above the base plate and is used to adjust the distance between the two sides of the clamping plate.

[0020] By adopting the above technical solution, the limiting strip plays a supporting and limiting role for the substrate, preventing the substrate from falling to the bending part of the clamp. After the adjusting bolt is tightened, the two sides of the clamp will move closer to each other, thereby improving the clamping and bonding effect of the clamp on the substrate, and thus ensuring that rainwater can reliably pass through the filter plate and reduce leakage.

[0021] Optionally, the inner wall of the mounting hole is provided with an annular receiving groove, which is close to the second branch pipe. The inner wall of the mounting hole is also provided with a pair of sliding grooves, one end of which is connected to the receiving groove, and the other end of which extends along the axial direction of the perforation. A slider is provided at the top and bottom of the filter plate, and the slider slides in the sliding groove. A spring is provided in the sliding groove, one end of which contacts the slider, and the other end of which is connected to the side of the sliding groove away from the receiving groove. A pull rope and a winding shaft are also provided in the mounting hole. The axis of the winding shaft is parallel to the axis of the mounting hole. The winding shaft is fixed to the inner side of the mounting hole by a support rod. One end of the pull rope is wound around the winding shaft, and the other end of the pull rope passes through the base plate and the spring in sequence and is connected to the slider.

[0022] By adopting the above technical solution, the receiving groove can be used to hold the mud and sand trapped by the filter plate. By manually winding the pull rope around the shaft, the slider can be pulled, and the spring is compressed. When the spring is fully compressed, the filter plate is installed in place; after the pull rope is unwound from the shaft, the spring releases energy and rebounds, thus removing the filter plate.

[0023] Optionally, the downpipe is equipped with a gate valve and a check valve. The gate valve is located above the check valve, the inlet of the check valve is close to the gate valve, and the outlet of the check valve is located above the junction of the first branch pipe and the second branch pipe.

[0024] By adopting the above technical solution, the gate valve is in the normally open state, and the check valve can be opened when rainwater flows downwards. When too much mud and sand accumulates in the downpipe, the valve plate of the check valve cannot be rotated, and rainwater will accumulate on the top of the building, thus prompting the operator to remove the mud and sand.

[0025] Optionally, the sealing cap is provided with a plurality of agitating strips on the side facing the interior of the first branch pipe, and the plurality of agitating strips are spaced apart and extend to the junction of the first branch pipe and the second branch pipe.

[0026] By adopting the above technical solution, when the sealing cover is opened, the stirring bar will stir in the first branch pipe, thereby loosening the mud and sand and improving the efficiency of mud and sand removal.

[0027] In summary, this application has the following beneficial effects:

[0028] 1. Rainwater flows downwards through the downpipe and passes through the filter mechanism on the second branch pipe. Under the action of gravitational potential energy, the rainwater is efficiently filtered. Then, the rainwater is pumped into the planting pots through the water pump and sprinkler pipes to irrigate the plants in the planting pots, thus realizing the collection and utilization of rainwater.

[0029] 2. The U-shaped clamp design allows for quick assembly and disassembly of the filter components without affecting the filtration effect on rainwater. This facilitates the replacement of filters with reduced filtration efficiency, thereby ensuring reliable rainwater filtration. Attached Figure Description

[0030] Figure 1 This is a schematic perspective view of this application;

[0031] Figure 2 This is a reference diagram of the assembly state of this application;

[0032] Figure 3 This is a schematic diagram showing the installation location of the filter mechanism;

[0033] Figure 4This is a cross-sectional view of the internal structure of the water storage tank;

[0034] Figure 5 It is a schematic three-dimensional representation of the filtration mechanism. Figure 1 ;

[0035] Figure 6 It is a schematic 3D diagram of the splint;

[0036] Figure 7 It is a schematic three-dimensional representation of the filtration mechanism. Figure 2 ;

[0037] Figure 8 This is a cross-sectional view of the internal structure of the filtering component;

[0038] Figure 9 It is a schematic 3D view of the sealing cap and the stirring bar;

[0039] In the diagram: 1. Downpipe; 11. First branch pipe; 111. Sealing cap; 1110. Agitator bar; 12. Second branch pipe; 121. Convex ring; 13. Gate valve; 14. Check valve;

[0040] 2. Building; 20. Planting pot;

[0041] 3. Water storage tank; 31. Water pump; 32. Spray pipe; 320. Spray hole;

[0042] 4. Filtering mechanism; 41. Clamping plate; 411. Perforation; 412. Connecting ring; 413. Fixing bolt; 414. Limiting strip; 415. Adjusting bolt; 42. Connecting pipe; 43. Filtering assembly; 431. Base plate; 4311. Mounting hole; 4312. Receiving groove; 4313. Slide groove; 4314. Spring; 4315. Pull rope; 4316. Rotating shaft; 4317. Support rod; 432. Filter plate; 4320. Sliding block. Detailed Implementation

[0043] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0044] Figure 1 This is a schematic perspective view of this application. Figure 2 This is a reference diagram showing the assembly state of this application. See also... Figure 1 and Figure 2A rainwater harvesting and utilization system for vertical greening buildings includes a downpipe 1 and a water storage tank 3 embedded in the bottom of a building 2. The downpipe 1 is located on the exterior facade of the building 2 and extends along the height of the facade. The water storage tank 3 is embedded in the bottom of the building 2 (i.e., below ground level), which can avoid the excessive weight of the water storage tank 3 from adversely affecting the stability of the building 2. One end of the downpipe 1 is connected to the top of the building 2, and the other end of the downpipe 1 is provided with a first branch pipe 11 and a second branch pipe 12. The first branch pipe 11 and the second branch pipe 12 converge at the end of the downpipe 1 (i.e., the downpipe 1, the first branch pipe 11 and the second branch pipe 12 are interconnected and form a Y shape). The first branch pipe 11 and the second branch pipe 12 are both located above ground level. The end of the first branch pipe 11 away from the downpipe 1 is connected to a sealing cap 111 by a thread. The end of the second branch pipe 12 away from the downpipe 1 is provided with a filter mechanism 4.

[0045] Figure 3 This is a schematic diagram showing the installation location of the filter mechanism. (See attached diagram.) Figure 3 and combined Figure 2 With the sealing cover 111 normally closed, rainwater from the top of building 2 flows downward through the downpipe 1 and enters the first branch pipe 11 and the second branch pipe 12. Due to the sealing cover 111, rainwater cannot flow outward from the first branch pipe 11. The end of the second branch pipe 12 is equipped with a filter mechanism 4. Under the influence of gravitational potential energy, rainwater passes through the filter mechanism 4 with greater pressure, thus achieving rapid filtration. Furthermore, one side of the filter mechanism 4 is connected to the second branch pipe 12, while the other side is equipped with a connecting pipe 42, which is connected to the water storage tank 3. Thus, rainwater filtered by the filter mechanism 4 enters the water storage tank 3 through the connecting pipe 42, thereby achieving rainwater collection.

[0046] Figure 4 This is a cross-sectional view of the internal structure of the water storage tank. See also... Figure 4 and combined Figure 2Several planting pots 20 are also provided on the exterior facade of building 2. Plants are planted in the planting pots 20. The planting pots 20 are staggered on the exterior facade of building 2 to form vertical greening. A water pump 31 and a sprinkler pipe 32 are provided in the water storage tank 3. One end of the sprinkler pipe 32 is connected to the outlet of the water pump 31. The other end of the sprinkler pipe 32 passes through the water storage tank 3 and extends to the inside of the planting pot 20 (that is, the other end of the sprinkler pipe 32 has multiple branches, and one branch is provided in each planting pot 20). The part of the sprinkler pipe 32 located in the planting pot 20 extends along the length of the planting pot 20, and several sprinkler holes 320 are provided on the outer wall of this part. The sprinkler holes 320 are located inside the planting pot 20 and above the soil in the planting pot 20. When the water pump 31 pumps the rainwater from the water storage tank 3 into the sprinkler pipe 32, the rainwater will spray out from the sprinkler holes 320 of the sprinkler pipe 32, thereby irrigating the plants in the planting pot 20. The sprinkler holes 320 are also spaced along the length of the planting pot 20 on the sprinkler pipe 32, so that the rainwater can be irrigated more evenly, improving the irrigation effect on the plants and realizing the reuse of the collected rainwater.

[0047] Figure 5 It is a schematic three-dimensional representation of the filtration mechanism. Figure 1 , Figure 6 This is a schematic 3D diagram of the splint. See also... Figure 5 and Figure 6 and combined Figure 3 The filter mechanism 4 includes a connecting pipe 42, a filter assembly 43, and a U-shaped clamping plate 41. A connecting ring 412 is provided on each of the two outer walls of the clamping plate 41. A protruding ring 121 is provided on the outer edge of the second branch pipe 12 near the clamping plate 41 and on the outer edge of the connecting pipe 42 near the clamping plate 41. A fixing bolt 413 is screwed between one protruding ring 121 and one connecting ring 412. After the fixing bolt 413 is tightened, the protruding ring 121 and the connecting ring 412 are reliably connected, thereby realizing the sequential connection of the second branch pipe 12, the clamping plate 41, and the connecting pipe 42. A through hole 411 is provided on each side of the clamping plate 41. One through hole 411 communicates with the second branch pipe 12, and the other through hole 411 communicates with the connecting pipe 42. The inner diameter of the second branch pipe 12, the inner diameter of the connecting ring 412, and the inner diameter of the through hole 411 are the same.

[0048] Figure 7 It is a schematic three-dimensional representation of the filtration mechanism. Figure 2 , Figure 8 This is a cross-sectional view of the internal structure of the filtering component. See also... Figure 7 and Figure 8The filter assembly 43 includes a substrate 431 and a filter plate 432. The substrate 431 is sandwiched inside a clamping plate 41 (i.e., the inner wall of the clamping plate 41 is in contact with the outer wall of the substrate 431). A mounting hole 4311 is provided in the middle of the substrate 431. The mounting hole 4311 and the through hole 411 are coaxially arranged, and the inner diameter of the mounting hole 4311 is not less than the inner diameter of the through hole 411. The filter plate 432 is disposed inside the mounting hole 4311. The filter assembly 43 is in communication with the two through holes 411. When rainwater flows through the through hole 411 from the second branch pipe 12, it enters the mounting hole 4311 and passes through the filter plate 432 inside the mounting hole 4311, thereby trapping the mud and sand in the rainwater on the side of the filter plate 432 facing the second branch pipe 12. In this way, the filtering effect of rainwater is achieved.

[0049] See Figure 7 A limiting strip 414 is provided on the inner walls of both sides of the clamping plate 41. The limiting strip 414 is close to the curved part of the clamping plate 41. The bottom of the base plate 431 is placed on the top of the two limiting strips 414. At the same time, an adjusting bolt 415 is provided on the upper part of the clamping plate 41. When the adjusting bolt 415 is gradually tightened, the upper ends of both sides of the clamping plate 41 will rotate slightly around the curved part of the clamping plate 41. That is, the distance between the two sides of the clamping plate 41 will gradually decrease. In this way, the outer wall of the base plate 431 will fit more tightly with the inner wall of the clamping plate 41, thereby preventing rainwater from leaking out from the joint between the base plate 431 and the clamping plate 41. This improves the fixing effect of the base plate 431 in the clamping plate 41, and ensures that the filter plate 432 in the base plate 431 can reliably filter rainwater. Furthermore, the two limiting strips 414 are separated from each other in the horizontal direction. In this way, when the adjusting bolt 415 adjusts the opening of the clamping plate 41, the two limiting strips 414 will not collide with each other while reliably supporting the base plate 431, and thus will not affect the adjustment of the clamping plate 41.

[0050] See Figure 3 and Figure 8An annular receiving groove 4312 is provided on the inner wall of the mounting hole 4311. The receiving groove 4312 is not connected to the end face of the mounting hole 4311 and is located between the end face of the second branch pipe 12 and the filter plate 432. A pair of sliding grooves 4313 are also provided on the inner wall of the mounting hole 4311. One end of the sliding groove 4313 is connected to the receiving groove 4312, and the other end of the sliding groove 4313 extends along the axial direction of the through hole 411 and is not connected to the end face of the mounting hole 4311. A slider 4320 is provided at both the bottom and top of the filter plate 432. The slider 4320 can slide adaptably in the sliding groove 4313. A spring 4314 is provided in the sliding groove 4313. One end of the spring 4314 abuts against the slider 4320, and the other end of the spring 4314 is connected to the inner wall of the sliding groove 4313 away from the receiving groove 4312. The mounting hole 4311 is also equipped with a pull rope 4315 and a rotating shaft 4316. The rotating shaft 4316 is fixed to the inner side of the mounting hole 4311 by a support rod 4317, and the axis of the rotating shaft 4316 is parallel to the axis of the mounting hole 4311. One end of the pull rope 4315 is wound around the rotating shaft 4316, and the other end of the pull rope 4315 passes through the base plate 431 and the spring 4314 in sequence and is connected to the slider 4320. That is to say, a through hole for the pull rope 4315 to pass through is also provided on the inner wall of the mounting hole 4311. One end of the through hole is connected to the mounting hole 4311, and the other end of the through hole is connected to the slide groove 4313. Furthermore, the through hole is curved, so as to avoid the pull rope 4315 from breaking due to friction in the through hole.

[0051] See Figure 3 and Figure 8When installing the filter plate 432, first insert the pull rope 4315 through the slide groove 4313 into the mounting hole 4311, then tilt the filter plate 432 and insert it into the receiving groove 4312, then restore the filter plate 432 to a vertical position so that both sliders 4320 on the filter plate 432 are located in the receiving groove 4312. Then rotate the filter plate 432 so that the sliders 4320 are aligned with the slide groove 4313. At this time, pulling the pull rope 4315 can pull the filter plate 432 to the inside of the mounting hole 4311, thus achieving the initial fixation of the filter plate 432. When the slider 4320 is continuously pulled and the spring 4314 is fully compressed, the filter plate 432 is installed in place. At this time, the end of the pull rope 4315 located in the mounting hole 4311 is wound around the shaft 4316, which fixes the position of the slider 4320, thus fixing the position of the filter plate 432. By controlling the amount of winding of the pull rope 4315 on the shaft 4316, the position of the filter plate 432 can be adjusted, allowing the filter assembly 43 to adapt to different rainwater collection requirements. After the position of the filter plate 432 is fixed, the side of the filter plate 432 near the second branch pipe 12 is aligned or close to the side of the receiving groove 4312 away from the second branch pipe 12. In this way, the mud and sand trapped by the filter plate 432 can fall into the receiving groove 4312, thereby preventing blockage in the mounting hole 4311 and improving the filtration effect of rainwater. When disassembling the filter plate 432, the pull rope 4315 is unwound from the shaft 4316, and the filter plate 432 is pushed into the receiving groove 4312 by the action of the spring 4314. The receiving groove 4312 can be used for the accumulation of mud and sand, and the inner diameter of the mounting hole 4311 is increased, which makes it easier to disassemble and assemble the filter plate 432.

[0052] See Figure 2 and Figure 8 A gate valve 13 and a check valve 14 are installed sequentially from top to bottom on the downpipe 1. The inlet of the check valve 14 faces the gate valve 13, and the outlet of the check valve 14 faces the junction of the first branch pipe 11 and the second branch pipe 12. The gate valve 13 is normally open. In this way, when rainwater flows from top to bottom in the downpipe 1, the rainwater can pass smoothly through the gate valve 13. When it flows to the check valve 14, the valve plate of the check valve 14 will be opened under the action of gravity, thus ensuring that the rainwater can flow smoothly downward. Since the sealing cap 111 on the first branch pipe 11 is normally closed, rainwater can only flow into the water storage tank 3 after passing through the filter mechanism 4 on the second branch pipe 12. The mud and sand trapped by the filter plate 432 will accumulate in the first branch pipe 11, the second branch pipe 12 and the downpipe 1. Due to the large gravitational potential energy of rainwater, rainwater can reliably pass through the trapped mud and sand. In other words, the mud and sand trapped in the second branch pipe 12 and the downpipe 1 by the filter plate 432 can achieve the first filtration of rainwater, and the filter plate 432 can perform the second filtration of rainwater.

[0053] Figure 9 This is a schematic three-dimensional diagram of the sealing cap and agitator bar. See also... Figure 9 and combined Figure 2 When too much mud and sand accumulates in the downpipe 1, the valve plate of the one-way valve 14 will not be able to open, and rainwater will not be able to flow downward through the downpipe 1. At this time, close the gate valve 13 and open the sealing cover 111. Since the sealing cover 111 has several agitator bars 1110 on the side facing the first branch pipe 11, and the agitator bars 1110 are spaced apart and extend to the junction of the first branch pipe 11 and the second branch pipe 12, when the sealing cover 111 is rotated, the agitator bars 1110 will disturb the mud and sand in the first branch pipe 11 and the junction of the first branch pipe 11 and the second branch pipe 12, thereby making the mud and sand loose, making it easier to remove the excess mud and sand accumulated in the first branch pipe 11. The remaining mud and sand in the second branch pipe 12 can be retained for the first filtration of rainwater, or it can be thoroughly cleaned after the clamp plate 41 is removed. The one-way valve 14 is positioned close to the junction of the first branch pipe 11 and the second branch pipe 12. This prevents excessive accumulation of mud and sand in the downpipe 1, which would affect the flow of rainwater and ensures effective and rapid filtration of rainwater.

[0054] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rainwater harvesting and utilization system for vertical greening buildings, characterized in that, Includes a downpipe (1) and a water storage tank (3) pre-embedded at the bottom of the building (2). One end of the downpipe (1) is connected to the top of the building (2), and the other end of the downpipe (1) is provided with a first branch pipe (11) and a second branch pipe (12). One end of the first branch pipe (11) is connected to the downpipe (1), and the other end is provided with a detachable sealing cap (111). One end of the second branch pipe (12) is connected to the downpipe (1), and the other end delivers rainwater to the water storage tank (3). The second branch pipe (12) is equipped with a filter mechanism (4) for filtering rainwater. The water storage tank (3) is equipped with a water pump (31) and a spray pipe (32). The water pump (31) pumps the rainwater in the water storage tank (3) out through the spray pipe (32) and uses it for watering plants. The filtration mechanism (4) includes a clamp (41) and a connecting pipe (42). The clamp (41) is U-shaped. One side of the clamp (41) is connected to the end of the second branch pipe (12) near the water storage tank (3). The other side of the clamp (41) is connected to one end of the connecting pipe (42). The other end of the connecting pipe (42) is connected to the water storage tank (3). The clamping plate (41) has a through hole (411) on both sides. One of the through holes (411) is connected to the second branch pipe (12), and the other through hole (411) is connected to the connecting pipe (42). A filter assembly (43) is clamped on the inner side of the clamping plate (41). The filter assembly (43) is connected to the two through holes (411). The filter assembly (43) includes a substrate (431) and a filter plate (432). The substrate (431) is provided with a mounting hole (4311). The mounting hole (4311) is coaxially arranged with the through hole (411). The inner diameter of the mounting hole (4311) is not less than the inner diameter of the through hole (411). The filter plate (432) is detachably disposed in the mounting hole (4311). The side wall of the substrate (431) is attached to the inner wall of the clamping plate (41). The inner wall of the mounting hole (4311) is provided with an annular receiving groove (4312), the receiving groove (4312) is close to the second branch pipe (12), and the inner wall of the mounting hole (4311) is also provided with a pair of sliding grooves (4313), one end of the sliding groove (4313) is connected to the receiving groove (4312), and the other end of the sliding groove (4313) extends along the axial direction of the through hole (411); The filter plate (432) is provided with a slider (4320) at both the top and bottom. The slider (4320) slides in the groove (4313) and a spring (4314) is provided in the groove (4313). One end of the spring (4314) is in contact with the slider (4320) and the other end of the spring (4314) is connected to the side of the groove (4313) away from the receiving groove (4312). The mounting hole (4311) is also provided with a pull rope (4315) and a rotating shaft (4316). The axis of the rotating shaft (4316) is parallel to the axis of the mounting hole (4311). The rotating shaft (4316) is fixed to the inside of the mounting hole (4311) by a support rod (4317). One end of the pull rope (4315) is wound around the rotating shaft (4316), and the other end of the pull rope (4315) passes through the base plate (431) and the spring (4314) in sequence and is connected to the slider (4320).

2. A rainwater harvesting and utilization system for vertical greening buildings according to claim 1, characterized in that, Several planting pots (20) are arranged vertically on the exterior of the building (2). The plants are planted in the planting pots (20). One end of the spray pipe (32) is connected to the water pump (31), and the other end of the spray pipe (32) is located in the planting pot (20) and sprays water toward the roots of the plants.

3. A rainwater harvesting and utilization system for vertical greening buildings according to claim 2, characterized in that, The outer wall of the spray pipe (32) is provided with a plurality of spray holes (320), which are located on the inner side of the planting pot (20) and are spaced apart along the length of the planting pot (20).

4. A rainwater harvesting and utilization system for vertical greening buildings according to claim 1, characterized in that, The outer edge of the second branch pipe (12) near the clamp plate (41) and the outer edge of the connecting pipe (42) near the clamp plate (41) are each provided with a protruding ring (121). The outer walls of both sides of the clamp plate (41) are each provided with a connecting ring (412). One of the protruding rings (121) is connected to the corresponding connecting ring (412) and fixed by a fixing bolt (413).

5. A rainwater harvesting and utilization system for vertical greening buildings according to claim 1, characterized in that, Each of the inner walls on both sides of the clamp (41) is provided with a limiting strip (414). The two limiting strips (414) are separated from each other in the horizontal direction. The limiting strips (414) are close to the curved part of the clamp (41). The bottom of the base plate (431) is in contact with the two limiting strips (414). An adjusting bolt (415) is provided above the clamping plate (41). The adjusting bolt (415) is located above the base plate (431) and is used to adjust the distance between the two sides of the clamping plate (41).

6. A rainwater harvesting and utilization system for vertical greening buildings according to any one of claims 1-5, characterized in that, The downpipe (1) is equipped with a gate valve (13) and a check valve (14). The gate valve (13) is located above the check valve (14). The inlet of the check valve (14) is close to the gate valve (13). The outlet of the check valve (14) is located above the junction of the first branch pipe (11) and the second branch pipe (12).

7. A rainwater harvesting and utilization system for vertical greening buildings according to claim 6, characterized in that, The sealing cap (111) has a plurality of stirring bars (1110) on the side facing the interior of the first branch pipe (11), and the plurality of stirring bars (1110) are spaced apart and extend to the junction of the first branch pipe (11) and the second branch pipe (12).

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