Rainwater collection and drainage device

Abstract

The utility model relates to a rainwater collection and drainage device, aims at solving the water resource waste and waterlogging problem existing in the roof rainwater treatment of old community. The device includes roof water collection unit, electric control valve and pretreatment purification unit. Roof water collection unit collects rainwater through the directional collection of slanting water collecting groove, and the rainwater flows into the main pipe through the drain pipe; the electric control valve adjusts the rainwater flow direction according to the rain amount, and the rainwater can be shunted to the urban drainage pipe or filter tank; the pretreatment purification unit purifies rainwater through multilayer filtration, and meets the demand of non-drinking purpose. The device is also equipped with flow sensor, liquid level meter and water pump, and realizes automatic control. The utility model collects, purifies and distributes rainwater reasonably, reduces the ground waterlogging risk and saves water resource, has remarkable economic and social benefits, and is suitable for the old community reconstruction and rainwater resource utilization scene.

Description

Technical Field

[0001] This utility model relates to the field of rainwater harvesting and drainage technology, specifically a rainwater collection and drainage device. Background Technology

[0002] Due to their age, the roof drainage systems of older residential communities have suffered decades of wind and rain erosion, far exceeding their designed service life. Various problems are intertwined, creating a complex and intractable management dilemma. Currently, the roof drainage systems of most older communities remain in a crude and disorganized state: rainwater from flat roofs flows freely along cracked waterproofing layers, seeping into the walls through loose eaves gaps, forming water stains of varying depths in the brick-concrete structure. In winter, the expansion of ice further exacerbates wall decay, leading to recurring roof leaks. Residents' ceilings and walls are constantly damp and peeling, requiring frequent repairs. Rainwater from sloping roofs cascades down through the gaps between tiles, washing over exposed wall base layers, causing large patches of exterior paint to peel off, affecting both the building's aesthetics and the wall's insulation performance.

[0003] Unguided rainwater, once it reaches the ground, easily accumulates to a depth of 10-20 centimeters at unit entrances and stairwell corners due to the high proportion of paved roads and poorly designed drainage slopes in the residential areas. Residents have to wade through the water, making it especially difficult for the elderly and children to walk. Even more seriously, in some older residential areas, the vertical drop between the basement entrance and the roof drainage point is less than half a meter. During moderate to heavy rains, rainwater forms a "waterfall" down the stair railings and flows back into the basement, not only flooding residents' stored items and bicycles but also soaking electrical equipment and elevator pits, causing property damage.

[0004] Due to their age, older residential communities often have numerous problems with their roof rainwater drainage systems. Currently, rainwater drainage in most of these communities is disorganized, with rainwater flowing freely, easily causing roof leaks, ground flooding, and basement backflow. Furthermore, a large amount of rainwater is not being used effectively, resulting in water waste. Utility Model Content

[0005] The present invention aims to overcome the defects of the prior art and provide a rainwater collection and drainage device to solve the problems of water waste and easy flooding in the existing rainwater treatment of roofs in old residential areas.

[0006] To solve the above-mentioned technical problems, this utility model is implemented as follows: A rainwater collection and drainage device, characterized in that it comprises: A roof water collection unit is installed along the edge of the roof for directional collection of rainwater from the roof. The roof water collection unit includes at least one water collection trough, which is inclined. Its higher end is connected to the roof, and its lower end is a drainage end. The drainage end is connected to a drainage pipe, which is connected to the main pipe. The electrically controlled valve includes an inlet end and two outlet ends. The inlet end is connected to the main pipe, and one of the outlet ends is connected to the urban drainage pipe. It is used to adjust the flow direction of rainwater in the main pipe according to the actual amount of rainfall. The pretreatment purification unit includes at least one filter tank, which is connected to the other outlet of an electrically controlled valve via a connecting pipe. An outlet pipe is provided at the bottom of one side of the filter tank for preliminary purification of the collected rainwater.

[0007] Furthermore, the roof water collection unit also includes a filter mesh with mounting posts on opposite sides. The drain end of the water collection tank has a slot, into which the mounting posts are inserted to position the filter mesh on the water collection tank for filtering debris from rainwater. This design effectively intercepts large particles of impurities in rainwater, preventing them from entering the subsequent drainage system, reducing the risk of pipe blockage, and protecting the filter material inside the filter tank, extending its service life.

[0008] Furthermore, the filter tank is internally arranged with a first filter layer, a second filter layer, and a water storage layer from top to bottom; both the first and second filter layers have removable partition plates at their bottoms for easy replacement of the filter materials. This layered filtration structure can gradually purify rainwater. The first filter layer mainly intercepts large particulate impurities, while the second filter layer further adsorbs and filters fine particles and harmful substances, ensuring that the purified rainwater meets the requirements for non-potable use.

[0009] Furthermore, the first filter layer includes gravel and sand to initially filter large particulate impurities in rainwater; the second filter layer is an activated carbon adsorption layer, with filter cotton at the bottom for further adsorption and filtration of fine particles and harmful substances in the rainwater. Activated carbon has excellent adsorption properties, effectively removing odors, pigments, and organic matter from rainwater, while the filter cotton further intercepts fine impurities, ensuring the purification effect.

[0010] Furthermore, the pretreatment and purification unit also includes a water pump, whose inlet is connected to the outlet pipe to extract the filtered rainwater for subsequent use. A level gauge is installed inside the water storage layer, electrically connected to the water pump, to control its start and stop, preventing the water level in the storage layer from becoming too high or too low. This design enables automatic extraction and storage of purified rainwater, ensuring that the purified rainwater can be promptly used for non-potable purposes such as urban greening irrigation, road cleaning, and vehicle washing, thus improving water resource utilization.

[0011] Furthermore, a flow sensor is installed within the main pipe, electrically connected to an electrically controlled valve. This flow sensor detects the amount of rainfall within the main pipe and transmits the signal to the electrically controlled valve to adjust its opening and closing status. The flow sensor can monitor rainfall in real time and automatically adjust the opening and closing status of the electrically controlled valve based on the actual rainfall amount, achieving reasonable diversion of rainwater. This ensures rapid drainage during heavy rain and full utilization of rainwater resources during periods of light rainfall, thus improving the intelligence level of the device.

[0012] Furthermore, the filter tank includes a tank body and a lid. The upper part of the tank body is open, and the lid is used to close the opening of the tank body to prevent external debris from entering the filter tank. A connecting pipe is connected to the outer wall of the lid, and the connecting pipe extends into the interior of the tank body to ensure that rainwater can smoothly enter the filter tank for purification. The design of the tank body and lid not only facilitates the maintenance and replacement of the filter material, but also effectively prevents external debris from entering the filter tank, ensuring the stability and reliability of the filtration process.

[0013] Furthermore, the outer wall of the filter tank is equipped with multiple supporting feet to stabilize the filter tank and prevent it from tipping over or moving. The design of the supporting feet enhances the stability of the filter tank, especially when the rainwater flow is large or the device is installed on uneven ground, effectively preventing the filter tank from tipping over or shifting, and ensuring the normal operation of the device.

[0014] Furthermore, the electrically controlled valve employs electromagnetic control to switch the water flow direction. The valve's internal components, including a valve core and seat with excellent sealing performance, ensure leak-free operation during valve switching. The electromagnetically controlled valve offers rapid response, quickly switching the water flow direction based on signals from the flow sensor. Simultaneously, its superior sealing performance guarantees the reliability and stability of the device, preventing water waste and environmental pollution.

[0015] Furthermore, the rainwater collection troughs are installed along the edge of the roof. Multiple troughs can be installed on a single roof, and these troughs are interconnected to expand the rainwater collection area. Rainwater can flow into the collection troughs along the roof surface. Multiple filter tanks can be installed, each connected to another outlet on an electrically controlled valve. Rainwater is evenly distributed and rapidly purified through connecting pipes and branch pipes. This design allows for flexible adjustment of the rainwater collection and purification scale according to actual needs, making it suitable for roofs of different areas and shapes, thus improving the applicability and flexibility of the device.

[0016] The beneficial effects of this utility model are as follows: As can be seen from the above technical solution, this application provides a rainwater collection and drainage device. By setting up a roof water collection unit, it can collect rainwater from the roof in a directional manner, prevent rainwater from flowing randomly, and reduce the risk of ground water accumulation and flooding.

[0017] Electrically controlled valves can flexibly adjust the direction of rainwater flow according to the actual rainfall, ensuring the full utilization of rainwater resources and enabling rapid drainage of rainwater in extreme weather conditions such as heavy rain, effectively preventing urban flooding.

[0018] The pretreatment and purification unit can perform multi-layer filtration and purification of rainwater. The purified rainwater meets the water quality requirements for various non-potable uses, reducing dependence on tap water and saving water resources.

[0019] The layered filtration structure and detachable design of the filter tank facilitate maintenance and replacement of filter materials, thereby improving the service life and reliability of the device.

[0020] The use of flow sensors and level gauges enables automated control, improving the operating efficiency and intelligence level of the equipment.

[0021] The flexible design of the water collection tank and filter tank allows for adjustment of the device size according to actual needs, making it suitable for different scenarios and offering high applicability and flexibility. Attached Figure Description

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments: Figure 1 A schematic diagram showing the connection between the main pipe and the connecting pipe of an electrically controlled valve; Figure 2 A schematic diagram showing the connection of multiple filter tanks via connecting pipes; Figure 3 for Figure 2 Enlarged view of section C; Figure 4 This is a schematic diagram of a water collection tank; Figure 5 This is a schematic diagram of the filter grid; Figure 6 A schematic diagram showing the assembly of multiple water collection tanks; The labels in the diagram indicate: 1. Roof water collection unit; 11. Water collection trough; 111. Slot; 112. Drainage end; 12. Filter mesh; 121. Mounting column; 13. Drainage pipe; 14. Main pipe; 15. Urban drainage pipe; 2. Electrically controlled valve; 21. Flow sensor; 3. Pretreatment purification unit; 31. Filter tank; 311. First filter layer; 312. Second filter layer; 313. Water storage layer; 314. Separating mesh plate; 315. Water outlet pipe; 32. Connecting pipe; 4. Ground. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection claimed in this application. Example 1 like Figure 1-6 As shown: A rainwater collection and drainage device, comprising: The roof water collection unit 1 is set at the edge of the roof and is used to collect rainwater from the roof in a directional manner. The roof water collection unit includes at least one water collection trough 11, which is inclined. Its high end is connected to the roof and its low end is a drainage end 112. The drainage end is connected to a drainage pipe 13, which is connected to a main pipe 14. The electrically controlled valve 2 includes an inlet end and two outlet ends. The inlet end is connected to the main pipe, and one of the outlet ends is connected to the urban drainage pipe 15. It is used to adjust the flow direction of rainwater in the main pipe according to the actual rainfall. The pretreatment purification unit 3 includes at least one filter tank 31. The filter tank is connected to the other outlet of the electrically controlled valve through a connecting pipe. An outlet pipe 315 is provided at the bottom of one side of the filter tank for preliminary purification of the collected rainwater.

[0024] Furthermore, the roof water collection unit also includes a filter mesh 12, with mounting posts 121 on opposite sides of the filter mesh. A slot 111 is provided at the drain end of the water collection tank, and the mounting posts are embedded in the slots to place the filter mesh on the water collection tank for filtering debris from rainwater. This design effectively intercepts large particles of impurities in rainwater, preventing them from entering the subsequent drainage system, reducing the risk of pipe blockage, and protecting the filter material inside the filter tank, extending its service life.

[0025] Furthermore, the filter tank is provided with a first filter layer 311, a second filter layer 312, and a water storage layer 313 arranged sequentially from top to bottom; the bottom of both the first and second filter layers is detachably equipped with a partition mesh 314 for easy replacement of filter materials. This layered filtration structure can gradually purify rainwater. The first filter layer mainly intercepts large particulate impurities, while the second filter layer further adsorbs and filters fine particles and harmful substances, ensuring that the purified rainwater quality meets the requirements for non-potable use.

[0026] Furthermore, the first filter layer includes gravel and sand to initially filter large particulate impurities in rainwater; the second filter layer is an activated carbon adsorption layer, with filter cotton at the bottom for further adsorption and filtration of fine particles and harmful substances in the rainwater. Activated carbon has excellent adsorption properties, effectively removing odors, pigments, and organic matter from rainwater, while the filter cotton further intercepts fine impurities, ensuring the purification effect.

[0027] Furthermore, the pretreatment and purification unit also includes a water pump, whose inlet is connected to the outlet pipe to extract the filtered rainwater for subsequent use. A level gauge is installed inside the water storage layer, electrically connected to the water pump, to control its start and stop, preventing the water level in the storage layer from becoming too high or too low. This design enables automatic extraction and storage of purified rainwater, ensuring that the purified rainwater can be promptly used for non-potable purposes such as urban greening irrigation, road cleaning, and vehicle washing, thus improving water resource utilization.

[0028] Furthermore, a flow sensor 21 is installed inside the main pipe. The flow sensor is electrically connected to the electrically controlled valve to detect the amount of rainfall in the main pipe and transmit the signal to the electrically controlled valve to adjust its opening and closing status. The flow sensor can monitor rainfall in real time and automatically adjust the opening and closing status of the electrically controlled valve according to the actual rainfall amount, realizing the rational diversion of rainwater. This ensures that rainwater can be discharged quickly during heavy rain and makes full use of rainwater resources when rainfall is light, thus improving the intelligence level of the device.

[0029] Furthermore, the filter tank includes a tank body and a lid. The upper part of the tank body is open, and the lid is used to close the opening of the tank body to prevent external debris from entering the filter tank. A connecting pipe is connected to the outer wall of the lid, and the connecting pipe extends into the interior of the tank body to ensure that rainwater can smoothly enter the filter tank for purification. The design of the tank body and lid not only facilitates the maintenance and replacement of the filter material, but also effectively prevents external debris from entering the filter tank, ensuring the stability and reliability of the filtration process.

[0030] Furthermore, multiple supporting feet are provided on the outer wall of the filter tank to stabilize it and prevent it from tipping over or moving. The design of the supporting feet enhances the stability of the filter tank, especially when the rainwater flow is large or the device is installed on uneven ground, effectively preventing the filter tank from tipping over or shifting, and ensuring the normal operation of the device.

[0031] Furthermore, the electrically controlled valve employs electromagnetic control to switch the water flow direction. The valve's internal components, including a valve core and seat with excellent sealing performance, ensure leak-free operation during valve switching. The electromagnetically controlled valve offers rapid response, quickly switching the water flow direction based on signals from the flow sensor. Simultaneously, its superior sealing performance guarantees the reliability and stability of the device, preventing water waste and environmental pollution.

[0032] Furthermore, the rainwater collection troughs are installed along the edge of the roof. Multiple troughs can be installed on a single roof, and these troughs are interconnected to expand the rainwater collection area. Rainwater can flow into the collection troughs along the roof surface. Multiple filter tanks can be installed, each connected to another outlet on an electrically controlled valve. Rainwater is evenly distributed and rapidly purified through connecting pipes and branch pipes. This design allows for flexible adjustment of the rainwater collection and purification scale according to actual needs, making it suitable for roofs of different areas and shapes, thus improving the applicability and flexibility of the device.

[0033] Example 2 A rainwater collection and drainage device is provided, wherein a water collection trough 11 is installed on the edge of the roof. Multiple water collection troughs 11 can be installed on a roof. The multiple water collection troughs 11 are connected to each other. When rainwater falls on the roof, the rainwater can flow into the water collection trough 11 along the roof.

[0034] The water collection trough 11 can be made of corrosion-resistant stainless steel or engineering plastic. The cross-sectional shape of the water collection trough 11 is U-shaped and it is inclined. The higher end in the vertical direction is the high end, and the other end is the low end, which is the drainage end 112. A drainage pipe 13 is connected to the low end. The drainage pipe 13 can be a PVC pipe or an HDPE pipe and is vertically arranged along the exterior wall of the building or in a pipe shaft. The inclined design of the water collection trough 11 facilitates the flow of rainwater from the high end to the low end, allowing the rainwater to flow into the drainage pipe 13. Specifically, each roof in the old residential area is equipped with a drainage pipe 13. Multiple drainage pipes 13 are connected to a main pipe 14 underground to transport the rainwater collected by the water collection trough 11 on the roof into the main pipe 14, preventing rainwater from being discharged indiscriminately and causing water accumulation on the ground, thus reducing the risk of flooding.

[0035] The electrically controlled valve 2 uses electromagnetic control to switch the water flow direction. The inlet diameter of the electrically controlled valve 2 matches the outer diameter of the main pipe 14. The electrically controlled valve 2 has a valve core and valve seat with excellent sealing performance to ensure no leakage during valve switching. The electrically controlled valve 2 can simultaneously set both outlets to the open state, that is, the water in the main pipe 14 flows out from the two outlets after passing through the electrically controlled valve 2, achieving the effect of diversion.

[0036] The pretreatment purification unit 3 is used to initially purify the collected rainwater to meet other water needs. The filter tank 31 is cylindrical and can be made of aluminum alloy or stainless steel. The outlet pipe 315 on the filter tank 31 is used to discharge the rainwater purified by the filter tank 31. Preferably, multiple filter tanks 31 can be provided, and each filter tank 31 is connected to another outlet end of the electrically controlled valve 2. Specifically, the outer diameter of the connecting pipe 32 is adapted to the diameter of the other outlet end of the electrically controlled valve 2. Multiple branch pipes are provided on the connecting pipe 32, with one end connected to the connecting pipe 32 and the other end connected to the filter tank 31. When rainwater flows from the outlet end of the electrically controlled valve 2 into the connecting pipe 32, the rainwater in the connecting pipe 32 flows evenly into each filter tank 31 through the branch pipes to quickly purify the collected rainwater and reduce the filtration pressure of each individual filter tank 31.

[0037] Specifically, when rainfall occurs, rainwater on the roof flows towards the roof edge under gravity and then flows into the water collection trough 11 of the roof water collection unit 1. The water collection trough 11 is set at an inclination angle of 3°-5°, allowing rainwater to flow smoothly along the trough to the drain end 112 by its own gravity, effectively preventing stagnation in the trough. Rainwater enters the drain pipe 13 from the drain end 112 of the water collection trough 11, and the rainwater collected by multiple drain pipes 13 eventually flows into the main pipe 14 for centralized transportation. The rainwater in the main pipe 14 flows into the inlet of the electrically controlled valve 2 through pipe pressure. The control module of the electrically controlled valve 2 adjusts the position of the internal valve core according to preset parameters (such as the amount of rainfall detected by the flow sensor 21), thereby changing the direction of rainwater flow. When rainfall is light, the electrically controlled valve 2 opens the outlet end connected to the connecting pipe 32, allowing rainwater to flow through the connecting pipe 32 into the filter tank 31 of the pretreatment purification unit 3. After undergoing multi-layer filtration and purification within the filter tank 31, the rainwater is discharged from the bottom outlet pipe 315 for subsequent use. When rainfall is heavy, the electrically controlled valve 2 opens both outlet ends, diverting the rainwater. One portion flows into the urban drainage pipe 15 and enters the urban drainage network, while the other portion flows into the filter tank 31, where it is filtered and then used for subsequent purposes.

[0038] The above are merely embodiments provided in this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A rainwater collection and drainage device, characterized in that... It includes: A roof water collection unit is installed along the edge of the roof for directional collection of rainwater from the roof. The roof water collection unit includes at least one water collection trough, which is inclined. Its higher end is connected to the roof, and its lower end is a drainage end. The drainage end is connected to a drainage pipe, which is connected to the main pipe. The electrically controlled valve includes an inlet end and two outlet ends. The inlet end is connected to the main pipe, and one of the outlet ends is connected to the urban drainage pipe. It is used to adjust the flow direction of rainwater in the main pipe according to the actual amount of rainfall. The pretreatment purification unit includes at least one filter tank, which is connected to the other outlet of an electrically controlled valve via a connecting pipe. An outlet pipe is provided at the bottom of one side of the filter tank for preliminary purification of the collected rainwater.

2. The rainwater collection and drainage device according to claim 1, characterized in that: The roof water collection unit also includes a filter mesh, with mounting posts on opposite sides of the filter mesh and a slot at the drain end of the water collection trough. The mounting posts are embedded in the slots so that the filter mesh is placed on the water collection trough to filter debris in the rainwater.

3. A rainwater collection and drainage device according to claim 1, characterized in that: The filter tank is provided with a first filter layer, a second filter layer and a water storage layer from top to bottom; the bottom of the first filter layer and the second filter layer can be detachably provided with a partition mesh plate for easy replacement of filter materials.

4. A rainwater collection and drainage device according to claim 3, characterized in that: The first filter layer consists of gravel and sand, which is used to initially filter large particulate impurities in rainwater; the second filter layer is an activated carbon adsorption layer, and filter cotton is placed at the bottom of the activated carbon adsorption layer to further adsorb and filter fine particles and harmful substances in rainwater.

5. A rainwater collection and drainage device according to claim 3, characterized in that: The pretreatment purification unit also includes a water pump, whose inlet end is connected to the outlet pipe to extract the filtered rainwater for subsequent use; a level gauge is installed inside the water storage layer, which is electrically connected to the water pump to control the start and stop of the water pump and prevent the water level in the water storage layer from being too high or too low.

6. A rainwater collection and drainage device according to claim 1, characterized in that: A flow sensor is installed inside the main pipe. The flow sensor is electrically connected to the electrically controlled valve to detect the amount of rainfall in the main pipe and transmit the signal to the electrically controlled valve to adjust the opening and closing state of the electrically controlled valve.

7. A rainwater collection and drainage device according to claim 1, characterized in that: The filter canister includes a canister body and a canister cover. The upper part of the canister body is open, and the canister cover is used to close the opening of the canister body to prevent external debris from entering the filter canister. The outer wall of the can lid is connected to a connecting pipe that extends into the interior of the can, ensuring that rainwater can smoothly enter the filter can for purification.

8. A rainwater collection and drainage device according to claim 7, characterized in that: The outer wall of the filter canister is provided with multiple supporting feet to stabilize the filter canister and prevent it from tipping over or moving.

9. A rainwater collection and drainage device according to claim 1, characterized in that: The electrically controlled valve uses electromagnetic control to switch the direction of water flow. The valve has a valve core and valve seat with excellent sealing performance to ensure no leakage during valve switching.

10. A rainwater collection and drainage device according to claim 1, characterized in that: The water collection trough is installed on the edge of the roof. Multiple water collection troughs can be installed on a roof. The multiple water collection troughs are connected to each other to expand the rainwater collection area. Rainwater can flow into the water collection trough along the roof. Multiple filter tanks can be installed, and all filter tanks are connected to another water outlet on the electrically controlled valve. Rainwater can be evenly distributed and quickly purified through connecting pipes and branch pipes.

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