Rainwater collecting device for old cell reconstruction

Abstract

The application discloses a rainwater collecting device for old community reconstruction, which comprises a water inlet pipe, a placing table for receiving rainwater flowing from the water inlet pipe, a connecting pipe, a drain pipe, a rainwater pool for discarding flow and a flow discarding pipe; the connecting pipe connects the placing table and the rainwater pool for discarding flow; the drain pipe connects the connecting pipe and an external recycling pool; an electromagnetic valve is arranged on the connecting pipe and located below the drain pipe; the flow discarding pipe is connected to the bottom of the rainwater pool for discarding flow; the device further comprises a water level monitoring assembly, a switch valve and a rainwater detecting assembly; when the water level monitoring assembly detects that the water level inside the rainwater pool for discarding flow rises to the highest water level, the electromagnetic valve is configured to be closed; when the water level monitoring assembly detects that the water level inside the rainwater pool for discarding flow is lower than the highest water level, the electromagnetic valve is configured to be turned on; the rainwater detecting assembly is configured to control the switch valve to cut off the rainwater flow into the flow discarding pipe when the rainwater flows in the water inlet pipe, and control the switch valve to be uncut off when there is no rainwater flowing in the water inlet pipe.

Description

Technical Field

[0001] This invention relates to a rainwater harvesting device, specifically a rainwater harvesting device for the renovation of old residential areas. Background Technology

[0002] Rainwater harvesting, more accurately termed "rainwater harvesting and utilization system," refers to the collection and utilization of rainwater runoff collected from building rooftops and hardened surfaces such as roads and plazas. This runoff is then collected, transported, purified, and stored to provide rainwater replenishment for greening, landscape water features, washing, and groundwater sources, thereby achieving the goal of comprehensive utilization of rainwater resources and water conservation.

[0003] In the initial stage of rainfall, rainwater contains dissolved large amounts of acidic gases, vehicle exhaust, factory emissions, and other pollutants from the air. After reaching the ground, the rainwater washes over building surfaces, roads, and trees, further increasing the amount of pollutants in the initial rainwater. In this field, this portion of initial rainwater containing a large amount of pollutants is referred to as initial rainwater. If initial rainwater is directly discharged into natural water bodies, the water bodies will suffer severe pollution.

[0004] Currently, some older residential communities use rainwater drainage systems that directly collect rainwater without diverting initial rainwater runoff. Therefore, during the renovation of rainwater and sewage systems in older residential communities, there is an urgent need to provide a rainwater collection device that can divert initial rainwater runoff and collect recyclable rainwater. Summary of the Invention

[0005] Purpose of the invention: The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a rainwater collection device for the renovation of old residential areas, which realizes the diversion of initial rainwater and the collection of recyclable rainwater in old residential areas.

[0006] To address the aforementioned technical problems, this invention discloses a rainwater collection device for the renovation of old residential communities. The device includes an inlet pipe for receiving rainwater, a receiving platform for collecting rainwater flowing from the inlet pipe, a connecting pipe, a drain pipe, a rainwater diversion tank, and a diversion pipe. The connecting pipe fluidly connects the receiving platform and the rainwater diversion tank. One end of the drain pipe is connected to the connecting pipe, and the other end is connected to an external recycling water tank. A solenoid valve is installed on the connecting pipe, and the solenoid valve is located below the drain pipe. The diversion pipe is connected to the bottom of the rainwater diversion tank. The device also includes a water level monitoring component, a switching valve, and a rainwater detection component. When the water level monitoring component detects that the water level inside the rainwater diversion tank has risen to the maximum water level, the solenoid valve is configured to close. When the water level monitoring component detects that the water level inside the rainwater diversion tank is lower than the maximum water level, the solenoid valve is configured to open. The rainwater detection component is configured to control the switching valve to cut off the flow of rainwater into the diversion pipe when there is rainwater flowing in the inlet pipe, and to control the switching valve to release the cut-off when there is no rainwater flowing in the inlet pipe.

[0007] In one embodiment, the device further includes an adjustable valve mechanism and a non-electric opening adjustment component. As the water level inside the stormwater diversion tank rises or falls, the opening adjustment component drives the valve mechanism to gradually increase or decrease the opening accordingly.

[0008] In one embodiment, the rainwater diversion tank is provided with a diversion outlet, and the diversion pipe is connected to the diversion outlet of the rainwater diversion tank. The diversion outlet is used to introduce rainwater into the diversion pipe. The switching valve includes a baffle plate, which is connected to the rainwater detection component. The baffle plate is disposed at the diversion outlet and can move up and down along the inner wall of the rainwater diversion tank.

[0009] In one embodiment, the rainwater detection device includes:

[0010] An elastic mechanism is installed on the mounting platform, and the extension and retraction direction of the elastic mechanism is vertical.

[0011] A water receiving box is located at the lower outlet of the water inlet pipe and is connected to the elastic mechanism;

[0012] And a second suspension rope, the lower end of which is fixedly connected to the baffle plate, and the upper end of which is connected to the lower end of the water receiving box via a transmission mechanism, the transmission mechanism being configured to amplify the vertical movement of the water receiving box.

[0013] In one embodiment, the transmission mechanism includes:

[0014] A fixed rack is fixedly connected to the lower end of the water receiving box;

[0015] The drive gear meshes with the fixed rack.

[0016] A large turntable is rotatably mounted on the mounting platform and is connected to the drive gear via a belt drive.

[0017] The first pull rope has one end wrapped around and secured to the large turntable;

[0018] And a movable pulley system, including a fixed pulley and a movable pulley, wherein the other end of the first pull rope is wrapped around the fixed pulley and the movable pulley;

[0019] The upper end of the second pull rope is fixedly connected to the movable pulley.

[0020] In one embodiment, the water receiving box has an overflow outlet on one side and a drip outlet at the bottom.

[0021] In one embodiment, the valve mechanism includes a rotary handle and a driven bevel gear fixedly connected to the rotary handle;

[0022] The opening adjustment component includes:

[0023] A floating component that floats on the surface of the water inside the wastewater collection tank; the floating component can rise and fall synchronously with the water level in the vertical direction;

[0024] A wheel is rotatably mounted to the outer wall of the wastewater diversion tank; a driving bevel gear is coaxially and fixedly sleeved on the rotating shaft of the wheel; wherein the driven bevel gear meshes with the driving bevel gear to form a bevel gear pair;

[0025] And a third pull rope, one end of which is connected to the floating component, and the other end is wrapped around the wheel and connected to the wheel via a disc spring;

[0026] As the floating component rises and falls with the water level in the stormwater diversion pool, the third pull rope is retracted or released, causing the wheel to rotate, which in turn rotates the handle, thereby gradually increasing or decreasing the opening of the valve mechanism.

[0027] In one embodiment, the floating element includes:

[0028] Floating board;

[0029] A counterweight is positioned above the float and fixedly connected to the float.

[0030] And several buoys, which are located below the float plate and fixedly connected to the float plate.

[0031] In one embodiment, the water level monitoring component includes a fixed pipe arranged vertically, which is installed inside the stormwater diversion tank and is in fluid communication with the tank to have the same water level. A floating element is disposed on the fixed pipe, which limits the vertical movement of the floating element.

[0032] In one embodiment, the water level monitoring component includes:

[0033] Floating components that float on the surface of the water inside the wastewater diversion tank;

[0034] A control button located above and directly opposite the float, the control button being electrically connected to the solenoid valve.

[0035] When the floating component rises with the water level in the stormwater diversion tank to the point of touching the control button, the control button controls the solenoid valve to close. When the floating component falls with the water level in the stormwater diversion tank to the point of disengaging from the control button, the control button controls the solenoid valve to open.

[0036] Beneficial effects:

[0037] (1) When it rains, water enters through the inlet pipe and overflows from the overflow outlet. Then, it enters the connecting pipe through the mounting platform. Since the solenoid valve is open, all the rainwater enters the diversion rainwater pool to collect the initial rainwater until the diversion rainwater pool is full. Although the rainfall rate is different due to different weather conditions, the total amount of initial rainwater in the same community is generally unchanged. The faster the rainfall rate, the faster the initial rainwater is collected. Therefore, when the diversion rainwater pool is full, it proves that the initial rainwater in the community has been collected. At this time, the floating part will move upward as the water level in the diversion rainwater pool rises and touches the control button, causing the solenoid valve to close. This allows the recyclable rainwater that enters through the inlet pipe to be discharged through the drain pipe and sent into the recycling pool, thus realizing the diversion of initial rainwater and the collection of recyclable rainwater.

[0038] (2) The interval between the end of one rain shower and the start of the next is unpredictable; it may be very short (e.g., thunderstorms) or very long. In older residential areas, rainwater washes away pollutants from the air and surface. These pollutants accumulate between two rainfalls. The shorter the interval between two rainfalls, the less pollutants are in the air and on the surface, and the less rainwater needs to be collected. Therefore, one embodiment of the present invention sets the shut-off valve to open only after the rain stops and closes again for the next rainfall. This allows only a small amount of rainwater to be collected into the rainwater diversion tank during the next rainfall to reach its maximum water level. For example, if the rainwater diversion tank is half full when it starts raining again, the baffle will close the diversion pipe again. Only about half the capacity of the rainwater diversion tank needs to be collected to restore it to full capacity, allowing the remaining rainwater to be collected. Compared to simply draining a fixed amount of initial rainwater, this invention allows more clean rainwater to be collected into an external recycling pool.

[0039] (3) In the short period after rain, due to the high level of cleanliness, the accumulation rate of pollutants is relatively fast. However, as time goes on and pollutants continue to accumulate, the accumulation rate of pollutants gradually decreases. Therefore, the total amount of initial rainwater required to flush away all pollutants does not increase uniformly over time; in other words, the growth rate of the total amount of initial rainwater required to flush away all pollutants is consistent with the accumulation rate of pollutants. Therefore, in one embodiment of this application, the opening degree of the valve mechanism is gradually increased or decreased as the water level inside the diversion rainwater tank rises or falls, so that the growth rate of the volume emptied from the diversion rainwater tank during the interval without rainfall is consistent with the accumulation rate of pollutants. The volume emptied from the diversion rainwater tank determines the actual amount of initial rainwater that flows into and is collected in the diversion rainwater tank after flushing away pollutants during the next rainfall. Compared to situations where the valve mechanism's opening is not adjustable, this embodiment collects a more consistent initial amount of rainwater into the diversion rainwater tank, which better matches the ideal scenario of flushing away accumulated pollutants within a given time interval. This allows more rainwater to be collected into an external recycling tank, maximizing rainwater utilization. Therefore, by adjusting the valve mechanism with a regulating component, the valve operates at maximum flow when the diversion rainwater tank is full. As the water level in the tank decreases, the valve's discharge rate decreases, better aligning with the changing rate of pollutant accumulation. This results in more efficient rainwater discharge and collection, maximizing rainwater utilization. Attached Figure Description

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, and the advantages of the present invention in the above and / or other aspects will become clearer.

[0041] Figure 1 A schematic diagram of the overall structure of a rainwater collection device for the renovation of old residential areas is provided as an embodiment of the present invention;

[0042] Figure 2 for Figure 1 The diagram shows a structural schematic of a rainwater detection component in a rainwater collection device for the renovation of old residential areas.

[0043] Figure 3 for Figure 1 A magnified view of region A in the middle.

[0044] Figure 4 for Figure 1 The diagram shows a structural schematic of a water level monitoring component in a rainwater collection device for the renovation of old residential areas.

[0045] The attached diagrams are labeled as follows: 1. Inlet pipe; 2. Rainwater diversion tank; 201. Diversion outlet; 3. Drainage pipe; 4. Connecting pipe; 5. Platform; 10. Second pull rope; 11. Movable pulley block; 12. Baffle plate; 13. Water collection box; 131. Overflow outlet; 132. Drip outlet; 14. Fixed rack; 15. Elastic mechanism; 16. Drive gear; 17. Large turntable; 18. Second small turntable; 19. First pull rope; 21. Diversion pipe; 22. Valve mechanism; 221. Rotating handle; 23. Bevel gear pair; 231. Driven bevel gear; 232. Driven bevel gear; 24. Wheel; 25. Third pull rope; 26. Fixed connecting pipe; 27. Float; 271. Counterweight; 272. Float ball; 41. Solenoid valve; and 42. Control button. Detailed Implementation

[0046] The following is combined Figures 1 to 4 The technical solution provided by this invention will be described in more detail below.

[0047] Currently, the rainwater drainage systems used in older residential areas include rainwater inlets, rainwater pipes, collection boxes, inspection wells, and outlets. During rainfall, rainwater flows directly into the collection boxes through the rainwater pipes. Because it contains initial rainwater, the rainwater in the collection boxes will cause pollution whether it is directly discharged into natural water bodies or used for greening, etc.

[0048] See now Figure 1One embodiment of the present invention discloses a rainwater collection device for the renovation of old residential communities. The device includes an inlet pipe 1 for receiving rainwater, a receiving platform 5 for collecting rainwater flowing from the inlet pipe 1, a connecting pipe 4, a drain pipe 3, a rainwater diversion tank 2, and a diversion pipe 21. The connecting pipe 4 fluidly connects the receiving platform 5 and the rainwater diversion tank 2. One end of the drain pipe 3 is connected to the connecting pipe 4, and the other end is connected to an external recycling tank; a solenoid valve 41 is installed on the connecting pipe 4, and the solenoid valve 41 is located below the drain pipe 3. Specifically, the solenoid valve 41 is adjacent to the drain pipe 3. The diversion pipe 21 is connected to the bottom of the rainwater diversion tank 2.

[0049] The device also includes a water level monitoring component, a switching valve, and a rainwater detection component. When the water level monitoring component detects that the water level inside the diversion rainwater tank 2 has risen to the maximum water level, the solenoid valve 41 is configured to close, allowing subsequent rainwater to flow into the external recycling tank through the drain pipe 3. When the water level monitoring component detects that the water level inside the diversion rainwater tank 2 is lower than the maximum water level, the solenoid valve 41 is configured to open, so that during the next rainfall, the initial rainwater can flow into and be collected in the diversion rainwater tank 2 through the connecting pipe 4.

[0050] The rainwater detection component is configured to control the switching valve to cut off the flow of rainwater from the diversion rainwater pool 2 to the diversion pipe 21 when there is rainwater flow in the inlet pipe 1, and to control the switching valve to release the cut-off when there is no rainwater flow in the inlet pipe 1.

[0051] The interval between two consecutive rain showers is unpredictable; it can be very short, like a thunderstorm, or very long. In older residential areas, rainwater washes away airborne pollutants and surface contaminants. These pollutants accumulate between rainfalls. The shorter the interval between two rainfalls, the less airborne and surface contaminants are present, and the less rainwater needs to be collected. This invention addresses this by setting a shut-off valve that is released only after the rain has stopped and then shut off again for the next rainfall. This allows only a small amount of rainwater to be collected into the rainwater diversion tank 2 during the next rainfall, ensuring the tank reaches its maximum water level and allowing more clean rainwater to be collected into an external recycling tank.

[0052] Specifically, the external recycling pond can be directly improved based on the existing rainwater drainage system's collection tank. The relatively clean rainwater collected in the recycling pond can provide rainwater replenishment for greening, landscape water features, washing, and groundwater sources, achieving the goal of comprehensive utilization of rainwater resources and water conservation. The other end of the diversion pipe can be connected to the community's domestic sewage drainage system, ultimately discharging into the municipal sewage pipeline. The total amount of initial rainwater required to flush away pollutants deposited to saturation should be calculated as the product of the polluted area area and a rainfall depth of 10mm to 20mm. The diversion rainwater pond can be located near the collection tank, and its specific size is designed based on the calculated total amount of initial rainwater.

[0053] See Figure 1 In one specific embodiment, the placement platform 5 is located below the inlet pipe 1, and the rainwater diversion tank 2 is located below the placement platform 5. The positional relationship between the connecting pipe 4 and the drain pipe 3 is configured such that when the solenoid valve 41 is turned on, the rainwater in the placement platform 5 flows into the rainwater diversion tank 2 under the action of gravity along the connecting pipe 4, but does not flow into the drain pipe 3. Only when the solenoid valve 41 is turned off will the rainwater in the placement platform 5 flow into the drain pipe 3.

[0054] See now Figure 1 In one embodiment, the device further includes an adjustable valve mechanism 22 and a non-electric opening adjustment component. As the water level inside the wastewater diversion tank 2 rises or falls, the opening adjustment component drives the valve mechanism 22 to gradually increase or decrease the opening, thereby gradually increasing or decreasing the flow rate through the valve mechanism 22.

[0055] In the short period immediately following rain, due to the high level of cleanliness, pollutants accumulate rapidly. However, as time passes and pollutants continue to accumulate, the accumulation rate gradually decreases. Therefore, the total amount of initial rainwater required to flush away all pollutants does not increase uniformly over time; in other words, the growth rate of the total amount of initial rainwater required to flush away all pollutants is consistent with the accumulation rate of the pollutants.

[0056] Therefore, in this embodiment, the opening of valve mechanism 22 is gradually increased or decreased as the water level inside the diversion rainwater tank 2 rises or falls. This ensures that during the interval without rainfall, the rate of increase in the volume of water drained from the diversion rainwater tank 2 matches the rate of accumulation of pollutants. The volume drained from the diversion rainwater tank 2 determines the actual initial rainfall volume that flows into and is collected in the diversion rainwater tank 2 after flushing out pollutants during the next rainfall. Compared to the case where the opening of valve mechanism 22 is not adjustable, the actual initial rainfall volume collected into the diversion rainwater tank 2 each time in this embodiment is more in line with the ideal initial rainfall volume required to flush out the pollutants accumulated during the corresponding time interval. This allows more rainwater to be collected into the external recycling tank, thereby maximizing the utilization of rainwater.

[0057] Therefore, by setting the regulating component to control the valve mechanism 22, when the rainwater diversion tank 2 is full, the valve mechanism 22 is at the maximum flow rate. As the water level inside the rainwater diversion tank 2 decreases, the discharge of the valve mechanism 22 continuously decreases, which is more in line with the change in the accumulation rate of pollutants and impurities, so as to realize more reasonable discharge and collection of rainwater and maximize the utilization of rainwater.

[0058] See now Figures 1 to 3 In one embodiment, the rainwater diversion tank 2 is provided with a diversion outlet 201, and a diversion pipe 21 is connected to the diversion outlet 201 of the rainwater diversion tank 2. The diversion outlet 201 is used to introduce rainwater into the diversion pipe 21. The switching valve includes a baffle plate 12, which is connected to the rainwater detection assembly. The baffle plate 12 is disposed at the diversion outlet 201 and can move up and down along the inner wall of the rainwater diversion tank 2 to fully open the diversion outlet 201.

[0059] See now Figure 1 and Figure 2 In one embodiment, the rainwater detection device includes an elastic mechanism 15, a water collection box 13, a transmission mechanism, and a suspended second pull rope 10. The elastic mechanism 15 is mounted on the mounting platform 5, and its extension and retraction direction is vertical. The water collection box 13 is located at the lower outlet of the water inlet pipe 1 and is connected to the elastic mechanism 15. The lower end of the second pull rope 10 is fixedly connected to the baffle plate 12, and the upper end is connected to the lower end of the water collection box 13 through the transmission mechanism, which is configured to amplify the vertical movement of the water collection box 13.

[0060] When it is not raining, there is no rainwater in the water collection box 13, and the elastic mechanism 15 is in a partially compressed state. At this time, the baffle is located above the diversion port 201, and the diversion port 201 is fully opened.

[0061] When it rains, rainwater flows out from the lower outlet of the inlet pipe 1 and enters the water collection box 13. As the rainwater accumulates in the water collection box 13, the elastic mechanism 15 is further compressed, causing the water collection box 13 to descend. This descent, via the transmission mechanism, drives the second pull rope 10 and the baffle plate 12 to descend simultaneously. When the water collection box 13 is full of rainwater, the baffle plate descends to completely block the overflow outlet 201.

[0062] When the rain stops and the water collection box 13 is empty, the elastic mechanism 15 provides a restoring force for the reciprocating movement of the water collection box 13. The water collection box 13 rises and drives the second pull rope 10 and the baffle plate 12 to rise synchronously through the transmission mechanism. When the baffle plate rises to a position above the diversion outlet 201, the diversion outlet 201 is fully opened.

[0063] See now Figure 2 In one embodiment, the elastic mechanism 15 is a spring.

[0064] See now Figure 1 and Figure 2 In one embodiment, the transmission mechanism includes a fixed rack 14, a drive gear 16, a large turntable 17, a first pull rope 19, and a movable pulley assembly 11. The fixed rack 14 is fixedly connected to the lower end of the water receiving box 13. The drive gear 16 meshes with the fixed rack 14. The large turntable 17 is rotatably mounted on the mounting platform 5 and is connected to the drive gear 16 via a belt drive. The movable pulley assembly 11 includes a fixed pulley and a movable pulley. One end of the first pull rope 19 is wound around and fixed to the large turntable 17, and the other end is wound around the fixed pulley and the movable pulley. The upper end of the second pull rope 10 is fixedly connected to the movable pulley.

[0065] Specifically, see Figure 2 The drive gear 16 is coaxially connected to the first small turntable, and the large turntable 17 is coaxially connected to the second small turntable 18. The belt is wound around the first small turntable and the second small turntable 18, thereby realizing the transmission connection between the large turntable 17 and the drive gear 16.

[0066] When water enters the inlet pipe 1, rainwater falls onto the water collection box 13 and accumulates, causing the water collection box 13 to descend. The elastic mechanism 15 contracts, and simultaneously, the fixed rack 14 drives the drive gear 16 to rotate, causing the second small turntable 18 to rotate the large turntable 17. The large turntable 17 lowers the first pull rope 19, and the fixed pulley and the second pull rope 10 descend synchronously, thus allowing the baffle plate 12 to close the diversion pipe 21. Conversely, when water no longer enters the inlet pipe 1, i.e., when rain stops, the rainwater inside the water collection box 13 drips from the drip outlet 132 into the placement platform 5 until it is empty. During this process, the baffle plate 12 rises and no longer closes the diversion pipe 21.

[0067] In this embodiment, the baffle 12 can be lifted more easily by setting up a movable pulley system. The arrangement of the second small turntable 18 driving the large turntable 17 ensures that there is enough movement distance for the baffle 12 to achieve the required displacement.

[0068] See now Figure 1 and Figure 2 In one embodiment, the water receiving box 13 has an overflow outlet 131 on one side and a drip outlet 132 at the bottom. The drip outlet 132 is used to drain water from inside the water receiving box 13 into the placement platform 5. The overflow outlet 131 is used to transport rainwater exceeding the capacity of the water receiving box 13 into the placement platform 5.

[0069] See now Figure 1 and Figure 3 In one embodiment, the valve mechanism 22 includes a rotating handle 221 and a driven bevel gear 232 fixedly connected to the rotating handle 221.

[0070] The opening adjustment assembly includes a float 27, a wheel 24, and a third pull rope 25. The float 27 floats on the water surface inside the stormwater diversion tank 2 and can rise and fall synchronously with the water level in the vertical direction. The wheel 24 is rotatably mounted to the outer wall of the stormwater diversion tank 2. A driving bevel gear 231 is coaxially and fixedly sleeved on the shaft of the wheel 24. The driven bevel gear 232 meshes with the driving bevel gear 231 to form a bevel gear pair 23. One end of the third pull rope 25 is connected to the float 27, and the other end is wound around the wheel 24 and connected to the wheel 24 through a coil spring.

[0071] When the float 27 rises and falls with the water level in the overflow rainwater pool 2, the third pull rope 25 is retracted or released, thereby causing the wheel 24 to rotate, which in turn causes the rotating handle 221 to rotate, thereby enabling the valve mechanism 22 to gradually increase or decrease its opening.

[0072] See now Figure 4 In one embodiment, the floating component 27 includes a float plate 271, a counterweight 272, and a plurality of floats 273. The counterweight 272 is disposed above the float plate 271 and fixedly connected to the float plate 271. The plurality of floats 273 are disposed below the float plate 271 and fixedly connected to the float plate 271.

[0073] See now Figure 4 In one embodiment, the water level monitoring component includes a fixed pipe 26 arranged vertically. The fixed pipe 26 is installed inside the rainwater diversion tank 2 and is in fluid communication with the rainwater diversion tank 2 to have the same water level as the rainwater diversion tank 2. A float 27 is disposed on the fixed pipe 26, and the fixed pipe 26 is used to limit the floating member 27 to rise and fall vertically.

[0074] See now Figure 4In one embodiment, the water level monitoring component includes a float 27 floating on the water surface inside the stormwater diversion tank 2 and a control button 42. The float 27 of the water level monitoring component is a float shared with the opening adjustment component, or it can be an additional float. The control button 42 is located above the float 27 and directly opposite it. The control button 42 is electrically connected to the solenoid valve 41. When the float 27 rises with the water level in the stormwater diversion tank 2 to the point of touching the control button 42, the control button 42 controls the solenoid valve 41 to close. When the float 27 falls with the water level in the stormwater diversion tank 2 to the point of disengaging from the control button 42, the control button 42 controls the solenoid valve 41 to open.

[0075] Specifically, the highest limit position of the float 27 is determined by the height of the control button 42, while the lowest limit position is determined by the lower end position of the fixed tube 26. The lower end of the fixed tube 26 is provided with an inwardly converging edge, which serves to stop the float 27 from falling further and prevent the float 27 from coming out of the fixed tube 26.

[0076] The highest limit position of the floating component 27 corresponds to the highest water level that can be reached inside the wastewater diversion tank 2.

[0077] The working process of one embodiment of the present invention is as follows:

[0078] Before it rains, the solenoid valve 41 is in the conducting state, and the baffle plate 12 does not block the overflow outlet 201 of the overflow rainwater diversion tank 2. When it rains, water enters through the inlet pipe 1, and the rainwater falls onto the water collection box 13 and accumulates continuously in the water collection box 13, causing the water collection box 13 to descend. The spring contracts, and at the same time, the fixed rack 14 descends synchronously with the water collection box 13. The fixed rack 14 drives the drive gear 16 to rotate, causing the second small turntable 18 to drive the large turntable 17 to rotate. The large turntable 17 lowers the first pull rope 19, causing the movable pulley and the second pull rope 10 to descend synchronously, thereby allowing the baffle plate 12 to close the overflow outlet 201 of the overflow rainwater diversion tank 2. Meanwhile, during rainfall, rainwater exceeding the capacity of the collection box 13 continuously overflows from the overflow outlet 131 into the placement platform 5. The rainwater inside the placement platform 5 then flows into the connecting pipe 4. Since the solenoid valve 41 is in the conducting state, all the rainwater flowing into the connecting pipe 4 enters and is collected inside the diversion rainwater tank 2, achieving initial rainwater collection. For the same residential area, once air pollutants and surface pollutants reach saturation, their total amount is essentially limited and remains in a dynamic equilibrium. Therefore, the amount of rainwater required for the initial flushing of pollutants is also relatively constant. This amount of rainwater determines the size of the diversion rainwater tank.

[0079] When the water level inside the diversion rainwater tank 2 rises to its maximum level, the float 27 moves upward along with the water level, touching the control button 42. This closes the solenoid valve 41, allowing rainwater flowing from the placement platform 5 into the inlet pipe 1 to be discharged into the external recycling tank via the drain pipe 3. This achieves the diversion of initial rainwater and the collection of recyclable rainwater. Afterward, when rainfall stops, rainwater in the collection box 13 is discharged from the drip outlet 132 until the collection box 13 is empty. During the emptying process, the empty collection box 13 returns to its original position under the action of a spring, and the baffle plate 12 rises above the diversion outlet 201 of the diversion rainwater tank 2, thus no longer sealing the diversion pipe 21. The initial rainwater in the diversion rainwater tank 2 begins to be discharged separately through the diversion pipe 21. When the next rainfall arrives, the baffle plate 12 descends to close the diversion outlet 201 of the diversion rainwater tank 2, and the above process repeats.

[0080] The interval between the end of one rain shower and the start of the next is unpredictable; it can be very short, like a thunderstorm, or it can be very long. The longer the interval between two rain showers, the more pollutants and impurities there are, and the more rainwater needs to be collected in the early stages. Conversely, the longer the interval, the less rainwater needs to be collected. For example, if it starts raining again when the initial rainwater in the diversion tank 2 is half full, the baffle plate 12 will close the diversion pipe 21 again. Only half the capacity of the diversion tank 2 needs to be collected to restore it to full capacity, and the remaining rainwater can then be collected.

[0081] Therefore, one embodiment of the present invention, by setting the shut-off valve to be released only after rainfall ends and shut off again during the next rainfall, means that during the next rainfall, only a small amount of rainwater needs to be collected into the rainwater diversion tank 2 to reach the maximum water level. Compared to directly draining a fixed amount of initial rainwater, the present invention allows more clean rainwater to be collected into an external recycling tank.

[0082] In the short period immediately following rain, due to the high level of cleanliness, pollutants accumulate rapidly. However, as time passes and pollutants continue to accumulate, the accumulation rate gradually decreases. Therefore, the total amount of initial rainwater required to flush away all pollutants does not increase uniformly over time; in other words, the growth rate of the total amount of initial rainwater required to flush away all pollutants is consistent with the accumulation rate of the pollutants.

[0083] Therefore, in one embodiment of this application, the opening of valve mechanism 22 is gradually increased or decreased as the water level inside the diversion rainwater tank 2 rises or falls. This ensures that during the interval without rainfall, the rate of increase in the volume of water drained from the diversion rainwater tank 2 matches the rate of accumulation of pollutants. The volume drained from the diversion rainwater tank 2 determines the actual initial rainfall volume that flows into and is collected in the diversion rainwater tank 2 after flushing out pollutants during the next rainfall. Compared to the case where the opening of valve mechanism 22 is not adjustable, the actual initial rainfall volume collected into the diversion rainwater tank 2 each time in this embodiment is more in line with the ideal initial rainfall volume required to flush out the pollutants accumulated during the corresponding time interval. This allows more rainwater to be collected into an external recycling tank, thereby maximizing the utilization of rainwater.

[0084] Therefore, by setting the regulating component to control the valve mechanism 22, when the rainwater diversion tank 2 is full, the valve mechanism 22 is at the maximum flow rate. As the water level inside the rainwater diversion tank 2 decreases, the discharge of the valve mechanism 22 continuously decreases, which is more in line with the change in the accumulation rate of pollutants and impurities, so as to realize more reasonable discharge and collection of rainwater and maximize the utilization of rainwater.

[0085] This invention provides a concept and method for a rainwater harvesting device used in the renovation of old residential communities. Many methods and approaches exist for implementing this technical solution; the above are merely preferred embodiments. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention. All components not explicitly stated in this embodiment can be implemented using existing technologies.

Claims

1. A rainwater collection device for the renovation of old residential areas, characterized in that, The system includes an inlet pipe (1) for receiving rainwater, a platform (5) for receiving rainwater flowing from the inlet pipe (1), a connecting pipe (4), a drain pipe (3), a rainwater diversion tank (2), and a diversion pipe (21); the connecting pipe (4) fluidly connects the platform (5) and the rainwater diversion tank (2); one end of the drain pipe (3) is connected to the connecting pipe (4), and the other end is connected to an external recycling tank; a solenoid valve (41) is installed on the connecting pipe (4), and the solenoid valve (41) is located below the drain pipe (3); the diversion pipe (21) is connected to the rainwater diversion tank (2). Bottom; The device also includes a water level monitoring component, a switching valve and a rainwater detection component. When the water level monitoring component detects that the water level inside the diversion rainwater tank (2) has risen to the highest water level, the solenoid valve (41) is configured to close; when the water level monitoring component detects that the water level inside the diversion rainwater tank (2) is lower than the highest water level, the solenoid valve (41) is configured to open; the rainwater detection component is configured to control the switching valve to cut off the flow of rainwater into the diversion pipe (21) when there is rainwater flow in the inlet pipe (1), and to control the switching valve to release the cut-off when there is no rainwater flow in the inlet pipe (1); The device also includes an adjustable valve mechanism (22) and a non-electric opening adjustment component. As the water level inside the wastewater tank (2) rises or falls, the opening adjustment component drives the valve mechanism (22) to gradually increase or decrease the opening accordingly.

2. The rainwater collection device for the renovation of old residential areas according to claim 1, characterized in that, The rainwater diversion tank (2) is provided with a diversion outlet (201), and the diversion pipe (21) is connected to the diversion outlet (201) of the rainwater diversion tank (2); the diversion outlet (201) is used to introduce rainwater into the diversion pipe (21); the switch valve includes a baffle plate (12), and the baffle plate (12) is connected to the rainwater detection component; the baffle plate (12) is located at the diversion outlet (201) and can move up and down along the inner wall of the rainwater diversion tank (2).

3. A rainwater collection device for the renovation of old residential areas according to claim 2, characterized in that, The rainwater detection device includes: an elastic mechanism (15) installed on the mounting platform (5), wherein the extension and retraction direction of the elastic mechanism (15) is vertical; A water receiving box (13) is provided at the lower outlet of the water inlet pipe (1) and is connected to the elastic mechanism (15); And a second pull rope (10) is suspended, the lower end of which is fixedly connected to the baffle plate (12), and the upper end is connected to the lower end of the water receiving box (13) through a transmission mechanism, the transmission mechanism being configured to amplify the vertical movement of the water receiving box (13).

4. A rainwater collection device for the renovation of old residential areas according to claim 3, characterized in that, The transmission mechanism includes: A fixed rack (14) is fixedly connected to the lower end of the water receiving box (13); The drive gear (16) meshes with the fixed rack (14); A large turntable (17) is rotatably mounted on the mounting platform (5) and is connected to the drive gear (16) via a belt drive. The first pull rope (19) is wrapped around and fixed to the large turntable (17) at one end. And a movable pulley system (11), including a fixed pulley and a movable pulley, wherein the other end of the first pull rope (19) is wrapped around the fixed pulley and the movable pulley; The upper end of the second pull rope (10) is fixedly connected to the movable pulley.

5. A rainwater collection device for the renovation of old residential areas according to claim 3, characterized in that, The water receiving box (13) has an overflow outlet (131) on one side and a drip outlet (132) at the bottom.

6. A rainwater collection device for the renovation of old residential areas according to claim 1, characterized in that, The valve mechanism (22) includes a rotating handle (221) and a driven bevel gear (232) fixedly connected to the rotating handle (221). The opening adjustment component includes: A floating component (27) floats on the water surface inside the wastewater diversion tank (2); the floating component (27) can rise and fall synchronously with the water level in the vertical direction; A wheel (24) is rotatably mounted to the outer wall of the wastewater diversion tank (2); a drive bevel gear (231) is coaxially and fixedly sleeved on the shaft of the wheel (24); wherein the driven bevel gear (232) meshes with the drive bevel gear (231) to form a bevel gear pair (23). And a third pull rope (25), one end of which is connected to the float (27), and the other end is wrapped around the wheel (24) and connected to the wheel (24) through a disc spring; When the floating component (27) rises and falls with the water level in the overflow rainwater pool (2), the third pull rope (25) is retracted or released, thereby causing the wheel (24) to rotate, which in turn causes the rotating handle (221) to rotate, thereby enabling the valve mechanism (22) to gradually increase or decrease its opening.

7. A rainwater collection device for the renovation of old residential areas according to claim 6, characterized in that, The floating component (27) includes: Floating plate (271); A counterweight (272) is disposed above the float (271) and fixedly connected to the float (271); And a number of floats (273) are disposed below the float plate (271) and fixedly connected to the float plate (271).

8. A rainwater collection device for the renovation of old residential areas according to claim 6, characterized in that, The water level monitoring component includes a fixed pipe (26) arranged vertically, which is installed inside the rainwater diversion tank (2) and is in fluid communication with the rainwater diversion tank (2) to have the same water level as the rainwater diversion tank (2); the floating component (27) is disposed on the fixed pipe (26), which is used to limit the floating component (27) to rise and fall vertically.

9. A rainwater collection device for the renovation of old residential areas according to claim 1, characterized in that, The water level monitoring component includes: Floating component (27) floating on the water surface inside the wastewater diversion tank (2); And a control button (42) located above the float (27) and directly opposite the float (27), the control button (42) being electrically connected to the solenoid valve (41); When the floating part (27) rises with the water level in the rainwater diversion tank (2) to the point of hitting the control button (42), the control button (42) controls the solenoid valve (41) to close. When the floating part (27) falls with the water level in the rainwater diversion tank (2) to the point of disengaging from the control button (42), the control button (42) controls the solenoid valve (41) to open.

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