Rainwater recovery system applied to sponge city

Abstract

The utility model provides a rainwater recycling system applied to a sponge city, and relates to the technical field of sponge cities. The system comprises a diversion well, a first filter well, a second filter well, a reservoir, a rainwater purification all-in-one machine and a clean water tank which are communicated in sequence, and an input well and an output well are arranged in the reservoir. The diversion well is provided with a first overflow port; the first filter well is provided with a second overflow port; the second filter well is provided with a third overflow port; a blow-off pipeline is arranged in the input well, and the input end of the blow-off pipeline is arranged at the bottom of the reservoir; a lifting pipeline is arranged in the output well, and rainwater in the rainwater module enters the rainwater purification all-in-one machine through the lifting pipeline; the clean water output end of the rainwater purification all-in-one machine is communicated with the clean water tank; the first overflow port, the second overflow port, the third overflow port, the output end of the blow-off pipeline and the sewage output end of the rainwater purification all-in-one machine are respectively communicated with the overflow blow-off pipeline.

Description

Technical Field

[0001] The utility model relates to the technical field of sponge cities, and in particular to a rainwater recycling system applied to sponge cities. Background Art

[0002] Sponge city is a new generation of urban stormwater management concept, which means that the city can adapt to environmental changes and respond to natural disasters caused by rainwater like a sponge, and has good elasticity. It can also be called a "water-elastic city". The city can adapt to environmental changes and respond to natural disasters like a sponge, and has good "elasticity". The internationally common term is "low-impact development rainwater system construction". When it rains, it absorbs, stores, infiltrates and purifies water. When needed, the stored water is released and used to achieve the free migration of rainwater in the city.

[0003] Therefore, rainwater recycling systems are crucial for the promotion and application of sponge cities. At present, the development of rainwater recycling systems is changing with each passing day. It mainly stores rainwater by setting up reservoirs, storing filtered clean water by setting up clear water tanks, and using various rainwater modules to store water at various stages for release when needed. However, the existing rainwater recycling systems usually focus on how to improve the efficiency of rainwater collection and the quality of filtered water. The overall perfection of the system is not high, and it is not suitable for use in rainy seasons in areas with abundant rainfall. On the one hand, it is because the pipeline system is complicated, and on the other hand, it is difficult to properly deal with the overflow generated during the flood season. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art.

[0005] To this end, the utility model provides a rainwater recycling system applied to sponge cities.

[0006] The utility model provides a rainwater recycling system for sponge cities, comprising a water storage tank, a clean water tank and a rainwater purification integrated machine, wherein the water storage tank and the clean water tank are both filled with rainwater modules for storing water, and further comprising:

[0007] A diversion well connected to the rainwater collection pipe, wherein the diversion well is provided with a first overflow port;

[0008] A first filter well is connected to the diversion well, wherein a first filter device is provided in the first filter well, and the first filter device filters rainwater with a first filtering accuracy; and a second overflow port is provided in the first filter well;

[0009] a second filter well, connected to the first filter well, wherein a second filter device is provided in the second filter well, and the second filter device filters rainwater with a second filter accuracy, wherein the second filter accuracy is higher than the first filter accuracy; and a third overflow port is provided in the second filter well;

[0010] An input well is arranged at one side of the water storage tank, the input well is connected with the second filter well, and the filtered rainwater enters the rainwater module in the water storage tank through the input well; a sewage pipe is arranged in the input well, and the input end of the sewage pipe is arranged at the bottom of the water storage tank;

[0011] An output well is arranged at the other side of the water storage tank, and a lifting pipeline is arranged in the output well, and rainwater in the rainwater module enters the rainwater purification integrated machine through the lifting pipeline; the clean water output end of the rainwater purification integrated machine is connected to the clean water tank;

[0012] The overflow sewage pipeline, the first overflow port, the second overflow port, the third overflow port, the output end of the sewage pipeline and the sewage output end of the rainwater purification integrated machine are respectively connected to the overflow sewage pipeline.

[0013] The rainwater recycling system applied to sponge cities according to the above technical solution of the utility model may also have the following additional technical features:

[0014] In the above technical solution, the height of the first overflow port is higher than the height of the second overflow port, and the height of the second overflow port is higher than the height of the third overflow port.

[0015] In the above technical solution, the overflow sewage pipeline, the first overflow port, the second overflow port, the third overflow port, the output end of the sewage pipeline and the connection position between the sewage output end of the rainwater purification machine and the overflow sewage pipeline are all provided with electric control valves.

[0016] In the above technical solution, a backwashing structure is also provided in the water reservoir, and the backwashing structure comprises:

[0017] A backwash pump is arranged in the input well;

[0018] The backwash pipeline is connected to the clean water tank. The backwash pipeline has a plurality of water outlets, and the plurality of water outlets of the backwash pipeline are evenly distributed at the bottom of the water storage tank.

[0019] In the above technical solution, a water supply well is provided in the clean water pool, the clean water output end of the rainwater purification integrated machine is connected to the water supply well, a water supply pipeline is provided in the water supply well, and a water supply pump is provided on the water supply pipeline.

[0020] The above technical solution also includes:

[0021] A water replenishment pipeline, wherein the input end of the water replenishment pipeline is connected to the tap water pipe, and the output end of the water replenishment pipeline is connected to the water supply well.

[0022] The above technical solution also includes:

[0023] A valve well, through which at least part of the water supply pipeline and the water replenishment pipeline pass, wherein a water supply valve for controlling the water supply pipeline and a water replenishment valve for controlling the water replenishment pipeline are arranged in the valve well, and the water supply valve and the water replenishment valve are arranged in the valve well.

[0024] In the above technical solution, the tops of the diversion well, the first filter well, the second filter well, the input well, the output well, the water supply well and the valve well are all provided with inspection covers, which, when opened, form inspection passages for maintenance personnel to pass through.

[0025] In the above technical solution, the first filter well is provided with a first sewage outlet, and the second filter well is provided with a second sewage outlet, and the first sewage outlet and the second sewage outlet are respectively used to discharge the filtered residual impurities.

[0026] In the above technical solution, the rainwater module adopts a PP rainwater module.

[0027] In summary, due to the adoption of the above technical features, the beneficial effects of the utility model are:

[0028] The rainwater recycling system applied to sponge cities provided by the utility model realizes efficient collection, purification and utilization of rainwater through multi-stage filtration and refined management. Among them, the diversion well, the first filter well and the second filter well are respectively provided with overflow ports, and are connected to the sewage system through overflow sewage pipes, so as to avoid system overflow and blockage caused by excessive rainwater in the rainy season or flood season, and protect the normal operation of the system. The utility model significantly improves the efficiency and stability of the rainwater recycling system through the organic combination of multi-stage filtration, intelligent control, automatic sewage discharge and backwashing functions, and provides an efficient, intelligent and environmentally friendly solution for sponge city construction.

[0029] Additional aspects and advantages of the present invention will become apparent in the following description or will be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0031] Figure 1 This is a schematic structural diagram of a rainwater recycling system applied to a sponge city according to an embodiment of the utility model;

[0032] Figure 2It is a structural schematic diagram of a rainwater recycling system applied to a sponge city according to an embodiment of the utility model.

[0033] in, Figure 1 and Figure 2 The corresponding relationship between the reference numerals and the component names is as follows:

[0034] 1. Diversion well; 2. First filter well; 3. Second filter well; 4. Reservoir; 5. Rainwater purification machine; 6. Clean water tank; 7. Rainwater collection pipe; 8. Overflow sewage pipe; 9. Valve well;

[0035] 11. First overflow port; 12. Inspection cover;

[0036] 111. Electronically controlled valve;

[0037] 21. First filter device; 22. Second overflow port; 23. First sewage outlet;

[0038] 31. Second filtering device; 32. Third overflow port; 33. Second sewage outlet;

[0039] 41. Rainwater module; 42. Input well; 43. Output well;

[0040] 421, sewage pipeline; 422, sewage pump; 423, backwash pump; 424, backwash pipeline; 425, water outlet;

[0041] 431, lifting pipeline; 432, lifting pump;

[0042] 51. Clean water output terminal; 52. Sewage output terminal;

[0043] 61. Water supply well; 62. Water supply pipeline; 63. Water supply pump; 64. Water supply pipeline;

[0044] 91. Water supply valve; 92. Water replenishment valve. DETAILED DESCRIPTION

[0045] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0046] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0047] Refer to the following Figure 1 and Figure 2To describe a rainwater recycling system for a sponge city provided according to some embodiments of the present invention.

[0048] Some embodiments of the present application provide a rainwater recycling system for application in a sponge city.

[0049] like Figure 1 As shown, the first embodiment of the utility model proposes a rainwater recycling system for sponge cities, including a diversion well 1, a first filter well 2, a second filter well 3, a reservoir 4, a rainwater purification integrated machine 5 and a clean water tank 6 connected in sequence, wherein the reservoir 4 and the clean water tank 6 are filled with a rainwater module 41 for storing water, and the reservoir 4 is provided with an input well 42 and an output well 43. It can be understood that the rainwater module 41 is a rainwater storage device widely used in sponge cities, and its main functions are storage and filtration. In addition to the basic storage and filtration functions, different types of rainwater modules 41 can be selected as needed in the present disclosure to increase the functions of the rainwater module 41, such as oxygenation and aeration, etc. The specific structure and type of the rainwater module 41 are not limited in the present disclosure. In the present disclosure, the rainwater module 41 adopts the existing PP rainwater module 41 as an example for explanation.

[0050] The diversion well 1 is connected to the rainwater collection pipe 7, and the rainwater collected in the sponge city enters the diversion well 1 through the rainwater collection pipe 7. The diversion well 1 is provided with a first overflow port 11, and when the water level in the diversion well 1 is too high, it can be discharged through the first overflow port 11.

[0051] The first filter well 2 is connected to the diversion well 1, and a first filter device 21 is provided in the first filter well 2. The first filter device 21 filters the rainwater with a first filtering accuracy, and performs preliminary filtering on the rainwater in the first filter well 2 to filter out larger particles and impurities. In some embodiments, the first filter device 21 can be a coarse grid installed at the connection position between the first filter well 2 and the second filter well 3, such as a sewage interception hanging basket device. The first filter well 2 is provided with a second overflow port 22, and when the water level in the first filter well 2 is too high, it can be discharged through the second overflow port 22.

[0052] The second filter well 3 is connected to the first filter well 2. The second filter well 3 is provided with a second filter device 31. The second filter device 31 filters the rainwater with a second filter accuracy, which is higher than the first filter accuracy. The second filter device 31 is used to further filter the rainwater filtered by the first filter device 21. In some embodiments, the second filter device 31 can be a fine grid installed at the connection position between the second filter well 3 and the input well 42, or other filtering methods can be used to filter finer impurities. The second filter well 3 is provided with a third overflow port 32. When the water level in the second filter well 3 is too high, it can be discharged through the third overflow port 32. In some embodiments, the second filter device 31 can also be provided with a flow discard function, that is, to discharge severely polluted rainwater at the initial stage of rainfall. When the flow discard reaches the requirement, the rainwater filtered by the second filter device 31 is input into the input well 42 of the reservoir 4, wherein the flow discard function can also be achieved through the third overflow port 32. However, considering that the third overflow port 32 is usually set at a relatively high position and cannot completely drain the severely polluted rainwater, an additional flow discard port is required to be set at the bottom of the second filter well 3.

[0053] By setting the first overflow port 11, the second overflow port 22 and the third overflow port 32, the overflow area can be effectively increased. Compared with the conventional treatment method, the diversion pressure of the diversion well 1 can be effectively alleviated, so that the first filter well 2 and the second filter well 3 can handle the overflow at the same time, thereby alleviating the treatment pressure of the system during heavy rainfall and preventing rainwater from overflowing onto the ground through the wells.

[0054] After the rainwater is pre-filtered by the first filter well 2 and the second filter well 3 , the rainwater is transported to the input well 42 .

[0055] An input well 42 is arranged at one side of the water reservoir 4. The input well 42 is connected to the second filter well 3. After filtration, rainwater enters the rainwater module 41 in the water reservoir 4 through the input well 42. The rainwater module 41 should fill the water reservoir 4 as much as possible. The rainwater in the input well 42 is further filtered by the rainwater module 41. After filtration, impurities will remain at the bottom of the water reservoir 4. A sewage pipe 421 is arranged in the input well 42. The input end of the sewage pipe 421 is arranged at the bottom of the water reservoir 4. A sewage pump 422 is arranged on the sewage pipe 421. The silt and sewage deposited at the bottom of the water reservoir 4 are discharged to the outside through the sewage pump 422.

[0056] The output well 43 is arranged at the other side of the water storage tank 4 to ensure that the rainwater enters the output well 43 after being filtered layer by layer by several rainwater modules 41. The output well 43 is provided with a lifting pipeline 431, and the rainwater in the rainwater module 41 enters the rainwater purification integrated machine 5 through the lifting pipeline 431, wherein the power of the lifting pipeline 431 is provided by the lifting pump 432. The rainwater purification integrated machine 5 is an existing device, and the rainwater purification integrated machine 5 can be used to perform the final filtering and purification treatment on the rainwater. The rainwater purification integrated machine 5 has a clean water output end 51 and a sewage output end 52. The clean water output end 51 of the rainwater purification integrated machine 5 is connected to the clean water tank 6, and the finally generated usable clean water is discharged into the clean water tank 6 for storage and standby use. The sewage generated by the rainwater purification integrated machine 5 will be discharged through the sewage output end 52.

[0057] In order to simplify the pipeline structure, an overflow sewage pipeline 8 is also designed, such as Figure 2 As shown, the first overflow port 11, the second overflow port 22, the third overflow port 32, the output end of the sewage pipe 421 and the sewage output end 52 of the rainwater purification integrated machine 5 are respectively connected to the overflow sewage pipe 8. That is, the overflow or sewage generated during the rainwater collection process is output through the overflow sewage pipe 8, and the overflow sewage pipe 8 is connected to the external sewage well or designated discharge location, wherein the sewage well and the designated discharge location are both sewage discharge locations with sufficient accommodating capacity.

[0058] In some embodiments, the height of the first overflow port 11 is higher than the height of the second overflow port 22, and the height of the second overflow port 22 is higher than the height of the third overflow port 32. Through the above arrangement, overflow discharge can be achieved through different overflow port combinations according to different rainfall. When the rainfall is relatively small, the third overflow port 32 on the second filter well 3 is used for discharge alone. At this time, the discharged water flow is at least filtered by the first filter well 2, which can reduce the risk of blockage of the overflow sewage pipe 8; when the rainfall is moderate, the third overflow port 32 on the second filter well 3 and the second overflow port 22 on the first filter well 2 are used for discharge together. At this time, at least part of the water flow is filtered by the first filter well 2; when the rainfall is relatively large, the third overflow port 32 on the second filter well 3, the second overflow port 22 on the first filter well 2 and the first overflow port 11 on the diversion well 1 are used for discharge together, and the overflow treatment efficiency is the highest. It can be understood that since the rainwater collection system is set below the ground, the height referred to in this embodiment is the relative height of the three. The closer the overflow port is to the ground, the higher the height.

[0059] In a specific implementation, the overflow sewage pipe 8, the first overflow port 11, the second overflow port 22, the third overflow port 32, the output end of the sewage pipe 421, and the sewage output end 52 of the rainwater purification integrated machine 5 are connected to the overflow sewage pipe 8. The discharge control at each location is performed by the electric control valve 111, and the discharge control can include the start and stop of the discharge, the discharge order, etc.

[0060] In some embodiments, a backwashing structure is further provided in the water reservoir 4, and the backwashing structure includes a backwashing pump 423 and a backwashing pipeline 424. The backwashing pump 423 is provided in the input well 42, and the backwashing pipeline 424 is connected to the clean water tank 6. The backwashing pipeline 424 has a plurality of water outlets 425, and the plurality of water outlets 425 of the backwashing pipeline 424 are evenly distributed at the bottom of the water reservoir 4. The clean water in the clean water tank 6 is pumped to the bottom of the water reservoir 4 by the backwashing pump 423, so as to flush the bottom of the water reservoir 4 and avoid sludge deposition.

[0061] In some embodiments, a water supply well 61 is provided in the clean water tank 6, and the clean water output end 51 of the rainwater purification integrated machine 5 is connected to the water supply well 61. A water supply pipeline 62 is provided in the water supply well 61, and a water supply pump 63 is provided on the water supply pipeline 62. The clean water stored in the clean water tank 6 is pumped to the water supply pipeline 62 by the water supply pump 63, and the water supply pipeline 62 transports the clean water to various application scenarios, such as green irrigation, municipal cleaning, landscape water, toilet water, industrial water, fire water, etc.

[0062] In some embodiments, in order to ensure that the system still operates normally during the period of insufficient rainwater, a water replenishment pipeline 64 is further provided, the input end of the water replenishment pipeline 64 is connected to the tap water pipe, and the output end of the water replenishment pipeline 64 is connected to the water supply well 61. When the water level in the clean water tank 6 is insufficient, the clean water tank 6 can be appropriately replenished with water through the water replenishment pipeline 64, especially when the backwash pipeline 424 is used to flush the water storage tank 4.

[0063] In a specific embodiment, the control valves of the water replenishment pipeline 64 and the water supply pipeline 62 are centrally arranged in the valve well 9, specifically, at least part of the water supply pipeline 62 and the water replenishment pipeline 64 pass through the valve well 9, and the valve well 9 is provided with a water supply valve 91 for controlling the water supply pipeline 62 and a water replenishment valve 92 for controlling the water replenishment pipeline 64, and the water supply valve 91 and the water replenishment valve 92 are arranged in the valve well 9.

[0064] In some embodiments, the tops of the diversion well 1, the first filter well 2, the second filter well 3, the input well 42, the output well 43, the water supply well 61 and the valve well 9 are all provided with inspection covers 12, which form inspection passages for maintenance personnel to pass through after the inspection covers 12 are opened. When each well needs to be cleaned or inspected, the residual water in the well is drained, and the maintenance personnel can enter the well through the inspection covers 12. The inspection covers 12 are flush with the ground, which is convenient for inspection and maintenance while ensuring the overall beauty of the rainwater recycling system.

[0065] In some embodiments, the first filter well 2 is provided with a first sewage outlet 23, and the second filter well 3 is provided with a second sewage outlet 33, wherein the first sewage outlet 23 and the second sewage outlet 33 are respectively used to discharge the residual impurities after filtration. The first sewage outlet 23 and the second sewage outlet 33 can be opened at a fixed time, or can be opened automatically when the system is idle to discharge the residual impurities after filtration.

[0066] In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0067] Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this utility model should be included in the protection scope of this utility model.

Claims

1. A rainwater recycling system for a sponge city, comprising a water storage tank (4), a clean water tank (6) and a rainwater purification integrated machine (5), wherein the water storage tank (4) and the clean water tank (6) are both filled with rainwater modules (41) for storing water, characterized in that: Also includes: A diversion well (1) connected to the rainwater collection pipe (7), wherein the diversion well (1) is provided with a first overflow port (11); A first filtering well (2) is connected to the diversion well (1), wherein a first filtering device (21) is provided in the first filtering well (2), and the first filtering device (21) filters rainwater with a first filtering accuracy; the first filtering well (2) is provided with a second overflow port (22); a second filter well (3) connected to the first filter well (2), wherein a second filter device (31) is provided in the second filter well (3), and the second filter device (31) filters rainwater with a second filter accuracy, wherein the second filter accuracy is higher than the first filter accuracy; and the second filter well (3) is provided with a third overflow port (32); An input well (42) is arranged at one side of the water reservoir (4); the input well (42) is connected to the second filtering well (3); filtered rainwater enters the rainwater module (41) in the water reservoir (4) through the input well (42); a sewage pipe (421) is arranged in the input well (42); an input end of the sewage pipe (421) is arranged at the bottom of the water reservoir (4); An output well (43) is arranged at the other side of the water storage tank (4); a lifting pipeline (431) is arranged in the output well (43); rainwater in the rainwater module (41) enters the rainwater purification integrated machine (5) through the lifting pipeline (431); a clean water output end (51) of the rainwater purification integrated machine (5) is connected to the clean water tank (6); The overflow sewage pipe (8), the first overflow port (11), the second overflow port (22), the third overflow port (32), the output end of the sewage pipe (421) and the sewage output end (52) of the rainwater purification integrated machine (5) are respectively connected to the overflow sewage pipe (8).

2. The rainwater recycling system for sponge city according to claim 1 is characterized in that: The height of the first overflow port (11) is higher than the height of the second overflow port (22), and the height of the second overflow port (22) is higher than the height of the third overflow port (32).

3. The rainwater recycling system for sponge city according to claim 2 is characterized in that: The overflow sewage pipe (8), the first overflow port (11), the second overflow port (22), the third overflow port (32), the output end of the sewage pipe (421), and the connection position between the sewage output end (52) of the rainwater purification integrated machine (5) and the overflow sewage pipe (8) are all provided with an electric control valve (111).

4. The rainwater recycling system for sponge city according to claim 1 is characterized in that: A backwashing structure is also provided in the water reservoir (4), and the backwashing structure comprises: A backwash pump (423) is disposed in the input well (42); The backwash pipeline (424) is connected to the clean water tank (6), and the backwash pipeline (424) has a plurality of water outlets (425). The plurality of water outlets (425) of the backwash pipeline (424) are evenly distributed at the bottom of the water storage tank (4).

5. The rainwater recycling system for sponge city according to claim 1 is characterized in that: A water supply well (61) is provided in the clean water pool (6); the clean water output end (51) of the rainwater purification integrated machine (5) is connected to the water supply well (61); a water supply pipeline (62) is provided in the water supply well (61); and a water supply pump (63) is provided on the water supply pipeline (62).

6. The rainwater recycling system for sponge city according to claim 5 is characterized in that: Also includes: A water replenishment pipeline (64), wherein the input end of the water replenishment pipeline (64) is connected to the tap water pipe, and the output end of the water replenishment pipeline (64) is connected to the water supply well (61).

7. The rainwater recycling system for sponge city according to claim 6 is characterized in that: Also includes: A valve well (9), through which at least a portion of a water supply pipeline (62) and a water replenishment pipeline (64) pass, wherein a water supply valve (91) for controlling the water supply pipeline (62) and a water replenishment valve (92) for controlling the water replenishment pipeline (64) are arranged in the valve well (9), and the water supply valve (91) and the water replenishment valve (92) are arranged in the valve well (9).

8. The rainwater recycling system for sponge city according to claim 7 is characterized in that: The tops of the diversion well (1), the first filter well (2), the second filter well (3), the input well (42), the output well (43), the water supply well (61) and the valve well (9) are all provided with inspection covers (12), and when the inspection covers (12) are opened, an inspection passage is formed for maintenance personnel to pass through.

9. The rainwater recycling system for sponge city according to claim 1 is characterized in that: The first filter well (2) is provided with a first sewage outlet (23), and the second filter well (3) is provided with a second sewage outlet (33), and the first sewage outlet (23) and the second sewage outlet (33) are respectively used to discharge filtered residual impurities.

10. The rainwater recycling system for sponge city according to claim 1 is characterized in that: The rainwater module (41) is a PP rainwater module (41).

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