Building roof rainwater purification collection and utilization system

Abstract

The utility model discloses a kind of building roof rainwater purification collection utilization systems, including roof drainage pipeline, collection pipeline, collection pond and at least two upper and lower sequentially arranged and for purifying rainwater biological retention device;Wherein, the roof drainage pipeline is used to access the rainwater of roof and the rainwater of roof is drained to the most upper biological retention device, overflow pipeline is connected on the biological retention device for the rainwater overflow in the biological retention device Drain to the adjacent biological retention device below, the overflow pipeline on the most lower biological retention device is connected with rainwater pipe network, the collection pipeline is connected with the lower end portion of the biological retention device, the collection pipeline is also connected with the collection pond and is used to drain the rainwater purified in the biological retention device to the collection pond.The utility model can purify and collect and utilize roof rainwater, can make full use of rainwater resources.

Description

Technical Field

[0001] This utility model relates to a rainwater purification, collection and utilization system for building roofs. Background Technology

[0002] Currently, rainwater from urban building roofs is typically discharged into urban stormwater drainage networks via rainwater pipes and then into waterways. For example, Chinese patent CN211523802U describes the use of rainwater pipes to discharge rainwater from building roofs. However, existing urban building roof drainage systems only consider the rapid discharge of rainwater and fail to purify and collect it for reuse, resulting in a waste of rainwater resources. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a building roof rainwater purification, collection and utilization system that can purify and collect rainwater from the roof and make full use of rainwater resources.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a rainwater purification, collection and utilization system for building roofs, including roof drainage pipes, collection pipes, collection pools and at least two biological retention devices arranged sequentially above and below for purifying rainwater.

[0005] The roof drainage pipe is used to connect to the rainwater on the roof and guide the rainwater to the uppermost bioretention device;

[0006] The bioretention device is connected to an overflow pipe for diverting rainwater overflowing from the bioretention device to an adjacent bioretention device below. The overflow pipe on the lowest bioretention device is connected to the rainwater pipe network.

[0007] The collection pipeline is connected to the lower end of the bioretention device, and the collection pipeline is also connected to the collection pool and is used to divert the purified rainwater in the bioretention device to the collection pool.

[0008] Furthermore, the upper end of the roof drainage pipe is connected to the roof, and the lower end of the roof drainage pipe extends above the uppermost bioretention device.

[0009] Furthermore, the upper end of the bioretention device is provided with an overflow port, the upper end of the overflow pipe is connected to the overflow port on the corresponding bioretention device, and the lower end of the overflow pipe extends to the top of the adjacent bioretention device below.

[0010] Furthermore, the lower end of the bioretention device is provided with a clean water outlet, and the collection pipeline is connected to the clean water outlet on each of the bioretention devices.

[0011] Furthermore, the building roof rainwater purification, collection, and utilization system also includes a circulating water pump and a reuse pipeline;

[0012] The inlet of the circulating water pump is connected to the collection tank, and the outlet of the circulating water pump is connected to the bioretention device through the reuse pipeline. The circulating water pump is used to pump rainwater from the collection tank to the bioretention device.

[0013] Furthermore, the building roof rainwater purification, collection and utilization system also includes a controller;

[0014] The bioretention device is equipped with a water level sensor for monitoring water level.

[0015] The water level sensor is connected to the controller and is used to send the monitored water level information to the controller.

[0016] The controller is connected to the circulating water pump and is used to control the operation of the circulating water pump based on the received water level information.

[0017] Furthermore, the collection pool is buried underground.

[0018] Further, a specific structure of the bioretention device is provided, the bioretention device includes a box, the box is provided with a covering layer, a planting soil layer, a sand filter layer and a gravel support layer arranged sequentially from top to bottom, and landscape plants are planted in the box.

[0019] Using the above technical solution, rainwater diverted to the bioretention device is intercepted and purified by the bioretention device before flowing into the collection pipe and then converging into the collection tank. When the rainfall is heavy, rainwater is rapidly diverted to the bioretention device. Due to the limited interception and purification speed of the bioretention device, the water level in the bioretention device continuously rises and overflows from the overflow pipe. Therefore, during heavy rainfall, rainwater from the roof is first diverted through the roof drainage pipe to the uppermost bioretention device. Then, the water level in the uppermost bioretention device continuously rises until it reaches the overflow height, at which point the rainwater overflows from the corresponding overflow pipe and is diverted to the adjacent lower bioretention device, i.e., the second bioretention device. After a period of time, the water level in the second bioretention device will also rise to the overflow height. Rainwater will then overflow from the corresponding overflow pipe and be diverted to the lower bioretention device, and so on, until the rainwater overflows and is diverted to the lowest bioretention device. Once the water level in the lowest bioretention device rises to the overflow height, the rainwater will overflow from the overflow pipe on the lowest bioretention device and flow into the stormwater network, and then into the river. In each bioretention device, rainwater is intercepted and purified. The purified rainwater then flows into the collection pipe and is collected in the collection pool. This process purifies and collects rainwater from the roof, allowing it to be used for irrigation of surrounding greenery or road washing on sunny days. This fully utilizes rainwater resources, conserves urban water resources, and contributes to the construction of sponge cities.

[0020] Furthermore, in the initial stages of rainfall, rainwater washes over the roof, carrying a large amount of pollutants. At this time, because it has only recently started raining, the water level in the bioretention device is relatively low. Therefore, the rainwater carrying a large amount of pollutants in the initial stage can be intercepted and purified by the bioretention device before converging into the collection pool through the collection pipe, thus reducing the initial runoff pollution from the roof. After a period of continuous rainfall, the roof has been washed clean, and the pollutants carried in the rainwater are greatly reduced. As the rainfall continues, the water level in the bioretention device rises, causing rainwater to overflow from the overflow pipe. Therefore, when the rainwater overflows from the overflow pipe of the lowest bioretention device into the stormwater network and finally into the river, the pollutants carried in the rainwater are minimal, thus reducing the pollution load on the river. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the building roof rainwater purification, collection and utilization system of this utility model;

[0022] In the diagram: 1. Roof drainage pipe; 2. Collection pipe; 3. Collection tank; 4. Bioretention device; 5. Overflow pipe; 6. Circulating water pump; 7. Reuse pipe; 8. Water level sensor. Detailed Implementation

[0023] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0024] like Figure 1 As shown, a rainwater purification, collection and utilization system for building roofs includes a roof drainage pipe 1, a collection pipe 2, a collection pool 3, and at least two bioretention devices 4 arranged sequentially above and below each other for purifying rainwater.

[0025] The roof drainage pipe 1 is used to connect to the rainwater on the roof and guide the rainwater to the uppermost bio-retention device 4;

[0026] The bioretention device 4 is connected to an overflow pipe 5 for diverting the rainwater overflowing from the bioretention device 4 to the adjacent bioretention device 4 below. The overflow pipe 5 on the lowest bioretention device 4 is connected to the rainwater pipe network.

[0027] The collection pipe 2 is connected to the lower end of the bioretention device 4, and the collection pipe 2 is also connected to the collection pool 3 and is used to divert the purified rainwater in the bioretention device 4 to the collection pool 3.

[0028] Specifically, rainwater diverted to the bioretention device 4 is intercepted and purified by the bioretention device 4 before flowing into the collection pipe 2 and then converging into the collection tank 3. When the rainfall is heavy, the rainwater will quickly flow into the bioretention device 4. Due to the limited interception and purification speed of the bioretention device 4, the water level in the bioretention device 4 will continuously rise and overflow from the overflow pipe 5. Therefore, when the rainfall is heavy, the rainwater on the roof will first flow from the roof drainage pipe 1 to the uppermost bioretention device 4. Then, the water level in the uppermost bioretention device 4 will continuously rise until it reaches the overflow height. After that, the rainwater will overflow from the corresponding overflow pipe 5 and be diverted to the adjacent lower bioretention device 4, that is, the second bioretention device 4. After a period of time, the water level in the second bioretention device 4 will also rise to the overflow height, and then the rainwater will overflow from the corresponding overflow pipe 5 and be diverted to the lower bioretention device 4. This process continues until the rainwater overflows and is diverted to the lowest bioretention device 4. After the water level in the lowest bioretention device 4 rises to the overflow height, the rainwater will overflow from the overflow pipe 5 on the lowest bioretention device 4 and flow into the rainwater pipe network and then into the river. In each bioretention device 4, the rainwater is intercepted and purified, and then the purified rainwater flows into the collection pipe 2 and is collected in the collection pool 3. This allows for the purification and collection of rainwater from the roof, so that the rainwater in the collection pool 3 can be used to irrigate the surrounding greenery or wash the roads on sunny days. This achieves full utilization of rainwater resources, saves urban water resources, and contributes to the construction of sponge cities. In this embodiment, the collection pipe 2 is connected to the lower end of each bioretention device 4. Furthermore, in the initial stages of rainfall, rainwater washes over the roof and carries a large amount of pollutants. Since the rain has just started, the water level in the bioretention device 4 is relatively low. Therefore, the rainwater carrying a large amount of pollutants can be intercepted and purified by the bioretention device 4 before flowing into the collection pool 3 through the collection pipe 2, thus reducing the initial runoff pollution from the roof. After a period of continuous rainfall, the roof has been washed clean, and the pollutants carried in the rainwater are greatly reduced. As the rainfall continues, the water level in the bioretention device 4 rises, causing rainwater to overflow from the overflow pipe 5. Therefore, when the rainwater overflows from the overflow pipe 5 on the lowest bioretention device 4 into the rainwater network and finally into the river, the pollutants carried in the rainwater are minimal, thus reducing the pollution load on the river.

[0029] like Figure 1 As shown, the upper end of the roof drainage pipe 1 is connected to the roof, and the lower end of the roof drainage pipe 1 extends to the top of the uppermost bioretention device 4, thereby enabling the roof drainage pipe 1 to divert rainwater from the roof to the uppermost bioretention device 4.

[0030] like Figure 1 As shown, the upper end of the bioretention device 4 is provided with an overflow port, the upper end of the overflow pipe 5 is connected to the overflow port on the corresponding bioretention device 4, and the lower end of the overflow pipe 5 extends to the top of the adjacent bioretention device 4 below, so that the rainwater overflowing from the bioretention device 4 can be diverted to the adjacent bioretention device 4 below through the overflow pipe 5.

[0031] Specifically, the lower end of the bioretention device 4 is provided with a clean water outlet, and the collection pipe 2 is connected to the clean water outlet of each of the bioretention devices 4.

[0032] like Figure 1 As shown, the building roof rainwater purification, collection and utilization system may also include a circulating water pump 6 and a reuse pipeline 7;

[0033] The inlet of the circulating water pump 6 is connected to the collection tank 3, and the outlet of the circulating water pump 6 is connected to the bioretention device 4 through the reuse pipeline 7. The circulating water pump 6 is used to pump rainwater from the collection tank 3 to the bioretention device 4. Specifically, the outlet of the circulating water pump 6 is connected to each of the bioretention devices 4 through the reuse pipeline 7.

[0034] like Figure 1 As shown, the building roof rainwater purification, collection and utilization system may also include a controller;

[0035] The bio-retention device 4 is equipped with a water level sensor 8 for monitoring water level height.

[0036] The water level sensor 8 is connected to the controller and is used to send the monitored water level information to the controller.

[0037] The controller is connected to the circulating water pump 6 and controls the operation of the circulating water pump 6 based on the received water level information. Specifically, on sunny days, when the water level sensor 8 detects that the water level in the bioretention device 4 is lower than a set value, the controller will control the circulating water pump 6 to start working. At this time, the circulating water pump 6 will pump rainwater from the collection pool 3 to the bioretention device 4 for replenishment, ensuring the normal growth of the landscape plants in the bioretention device 4. Further specifically, excess water pumped into the bioretention device 4 will be intercepted and purified again by the bioretention device 4 before flowing back into the collection pool 3 through the collection pipe 2, realizing the circulation and purification of rainwater in the collection pool 3 and preventing water quality deterioration due to prolonged storage. Further specifically, each bioretention device 4 is equipped with a water level sensor 8. When any water level sensor 8 detects that the water level is lower than a set value, the controller will control the circulating water pump 6 to start working.

[0038] like Figure 1 As shown, the collection pool 3 can be buried underground.

[0039] Specifically, the bioretention device 4 includes a box, which contains a covering layer, a planting soil layer, a sand filter layer and a gravel support layer arranged sequentially from top to bottom, and landscape plants are planted in the box; in this embodiment, the overflow outlet is located at the upper end of the box, and the purification outlet is located at the lower end of the box.

[0040] In summary, rainwater diverted to the bioretention device 4 is intercepted and purified by the bioretention device 4 before flowing into the collection pipe 2 and then converging into the collection tank 3. When the rainfall is heavy, the rainwater will be rapidly diverted to the bioretention device 4. Due to the limited interception and purification speed of the bioretention device 4, the water level in the bioretention device 4 will continuously rise and overflow from the overflow pipe 5. Therefore, when the rainfall is heavy, the rainwater on the roof will first be diverted from the roof drainage pipe 1 to the uppermost bioretention device 4. Then, the water level in the uppermost bioretention device 4 will continuously rise until it reaches the overflow height, after which the rainwater will overflow from the corresponding overflow pipe 5 and be diverted to the adjacent lower bioretention device 4, that is, the second bioretention device 4. After a period of time, the water level in the second bioretention device 4 will also rise to the overflow height, and then the rainwater will overflow from the corresponding overflow pipe 5 and be diverted to the lower bioretention device 4. This process continues until the rainwater overflows and is diverted to the lowest bioretention device 4. After the water level in the lowest bioretention device 4 rises to the overflow height, the rainwater will overflow from the overflow pipe 5 on the lowest bioretention device 4 and flow into the rainwater pipe network and then into the river. In each bioretention device 4, the rainwater is intercepted and purified, and then the purified rainwater flows into the collection pipe 2 and is collected in the collection pool 3. This allows for the purification and collection of rainwater from the roof, so that the rainwater in the collection pool 3 can be used to irrigate the surrounding greenery or wash the roads on sunny days. This achieves full utilization of rainwater resources, saves urban water resources, and contributes to the construction of sponge cities.

[0041] Furthermore, in the initial stages of rainfall, rainwater washes over the roof and carries a large amount of pollutants. Since the rain has just started, the water level in the bioretention device 4 is relatively low. Therefore, the rainwater carrying a large amount of pollutants can be intercepted and purified by the bioretention device 4 before flowing into the collection pool 3 through the collection pipe 2, thus reducing the initial runoff pollution from the roof. After a period of continuous rainfall, the roof has been washed clean, and the pollutants carried in the rainwater are greatly reduced. As the rainfall continues, the water level in the bioretention device 4 rises, causing rainwater to overflow from the overflow pipe 5. Therefore, when the rainwater overflows from the overflow pipe 5 on the lowest bioretention device 4 into the rainwater network and finally into the river, the pollutants carried in the rainwater are minimal, thus reducing the pollution load on the river.

[0042] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A rainwater purification, collection, and utilization system for building roofs, characterized in that, It includes a roof drainage pipe (1), a collection pipe (2), a collection tank (3), and at least two bio-retention devices (4) arranged vertically and vertically for purifying rainwater. The roof drainage pipe (1) is used to connect to the rainwater on the roof and guide the rainwater on the roof to the uppermost bio-retention device (4); The bioretention device (4) is connected to an overflow pipe (5) for diverting the overflowing rainwater in the bioretention device (4) to the adjacent bioretention device (4) below. The overflow pipe (5) on the lowest bioretention device (4) is connected to the rainwater pipe network. The collection pipe (2) is connected to the lower end of the bioretention device (4), and the collection pipe (2) is also connected to the collection pool (3) and is used to divert the purified rainwater in the bioretention device (4) to the collection pool (3).

2. The building roof rainwater purification, collection, and utilization system according to claim 1, characterized in that, The upper end of the roof drainage pipe (1) is connected to the roof, and the lower end of the roof drainage pipe (1) extends above the uppermost bio-retention device (4).

3. The building roof rainwater purification, collection, and utilization system according to claim 1, characterized in that, The upper end of the bioretention device (4) is provided with an overflow port, the upper end of the overflow pipe (5) is connected to the overflow port on the corresponding bioretention device (4), and the lower end of the overflow pipe (5) extends to the top of the adjacent bioretention device (4) below.

4. The building roof rainwater purification, collection, and utilization system according to claim 1, characterized in that, The lower end of the bioretention device (4) is provided with a clean water outlet, and the collection pipe (2) is connected to the clean water outlet on each of the bioretention devices (4).

5. The building roof rainwater purification, collection, and utilization system according to claim 1, characterized in that, It also includes a circulating water pump (6) and a reuse pipeline (7); The inlet of the circulating water pump (6) is connected to the collection tank (3), and the outlet of the circulating water pump (6) is connected to the bioretention device (4) through the reuse pipeline (7). The circulating water pump (6) is used to pump rainwater from the collection tank (3) to the bioretention device (4).

6. The building roof rainwater purification, collection, and utilization system according to claim 5, characterized in that, It also includes the controller; The bio-retention device (4) is equipped with a water level sensor (8) for monitoring water level height. The water level sensor (8) is connected to the controller and is used to send the monitored water level information to the controller; The controller is connected to the circulating water pump (6) and is used to control the operation of the circulating water pump (6) according to the received water level information.

7. The building roof rainwater purification, collection, and utilization system according to claim 1, characterized in that, The collection pool (3) is buried underground.

8. The building roof rainwater purification, collection, and utilization system according to claim 1, characterized in that, The bio-retention device (4) includes a box, which is provided with a covering layer, a planting soil layer, a sand filter layer and a gravel support layer arranged from top to bottom, and landscape plants are planted in the box.

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