A rainwater system and a method for upgrading and controlling pollution of a source rainwater system

Abstract

The present application provides a rainwater system and a method for upgrading and pollution control of a source rainwater system. The rainwater system comprises an existing rainwater well, a newly-built sediment well, an existing rainwater outlet pipeline, a newly-built regulating tank system and a newly-built flap gate. The newly-built regulating tank system comprises at least one newly-built regulating tank located downstream of the newly-built sediment well and connected between the newly-built sediment well and a municipal rainwater pipeline or a municipal sewage pipeline. The present application fully retains the use of the existing municipal rainwater drainage pipeline and rainwater pump station, controls the source land rainwater runoff and runoff pollution by newly building a regulating tank and a connecting pipeline at the end of the source land rainwater system and combining the control of each gate, realizes the upgrading of the source land rainwater drainage system and the control of the initial rainwater runoff, reduces the reconstruction engineering quantity of the downstream municipal rainwater drainage pipeline and pump station, has great social benefits such as improving the regional flood control safety and urban water environment quality, and also has great economic benefits.

Description

Technical Field

[0001] This invention belongs to the field of water security improvement and water pollution control technology, and relates to a rainwater system and a method for upgrading and controlling pollution in the source rainwater system. Background Technology

[0002] In recent years, against the backdrop of global climate change, extreme weather events, such as typhoons and torrential rains, have become increasingly frequent. Because existing municipal stormwater drainage pipes and pumping stations are generally built to low standards and their scale cannot meet new drainage standards, incidents of disaster caused by torrential rains occur frequently. In current technology, municipal stormwater drainage systems with low standards are generally upgraded by increasing the number of stormwater pipes and expanding the capacity of pumping stations to ensure regional drainage safety.

[0003] Meanwhile, due to the high non-point source pollution load in cities, initial rainwater contains a large amount of pollutants. When these pollutants are discharged into rivers through pumping stations, they severely impact the aquatic environment of the receiving water bodies. Current technologies typically employ regulating reservoirs at the end of the drainage system to reduce initial rainwater runoff pollution and alleviate the problem of pollution from pumping station discharges into rivers.

[0004] Due to heavy urban traffic, numerous underground infrastructure and pipelines, and limited land, the renovation of municipal stormwater drainage pipes, the expansion of stormwater pumping stations, and the construction of new stormwater storage tanks are extremely challenging. Furthermore, if the standards for municipal stormwater drainage systems are not improved in a timely manner, it will affect drainage at the source of the stormwater, potentially leading to water accumulation within the site and, in more serious cases, disasters.

[0005] Therefore, how to minimize the modification of the existing municipal stormwater drainage system and effectively utilize the existing municipal stormwater drainage pipes and stormwater pumping stations to reduce the scope of engineering construction and save on engineering costs; fully ensure that stormwater runoff and runoff pollution at the source plots are effectively controlled, prevent water accumulation in the plots within the design rainfall recurrence period, and reduce pollution from downstream municipal stormwater pumping stations into the river have become urgent technical problems that need to be solved by those skilled in the art. Summary of the Invention

[0006] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a rainwater system and a method for upgrading and controlling pollution in the source rainwater system, in order to solve the problem of the great difficulty in the renovation of municipal rainwater drainage pipes, expansion of rainwater pumping stations, and construction of rainwater storage tanks in the prior art.

[0007] To achieve the above and other related objectives, the present invention provides a rainwater system, comprising:

[0008] Existing rainwater wells;

[0009] A new sedimentation well is constructed, located downstream of the existing rainwater well and connected to the existing rainwater well via a pipeline;

[0010] The existing rainwater outlet pipe is located downstream of the newly built sedimentation well and connected between the newly built sedimentation well and the municipal rainwater pipe. A new gate is installed on the existing rainwater outlet pipe.

[0011] A new regulating reservoir system includes at least one new regulating reservoir, which is located downstream of the new sedimentation well and connected between the new sedimentation well and the municipal stormwater pipe or municipal sewage pipe. The outlet end of the new regulating reservoir is equipped with an air venting pump.

[0012] A new flap gate is installed downstream of the newly built stormwater storage tank system and the existing stormwater outlet pipe to prevent water from the external municipal stormwater network from flowing back into the internal stormwater system.

[0013] Optionally, the newly constructed stormwater storage system includes at least one of a newly constructed initial stormwater storage tank, a newly constructed rainwater storage tank, and a newly constructed upgraded stormwater storage tank; the newly constructed initial stormwater storage tank is located downstream of the newly constructed sedimentation well and connected between the newly constructed sedimentation well and the municipal sewage pipeline, and a newly constructed gate is installed on the pipeline leading to the newly constructed initial stormwater storage tank; the newly constructed rainwater storage tank is located downstream of the newly constructed sedimentation well and connected between the newly constructed sedimentation well and the municipal rainwater pipeline, and a newly constructed gate is installed on the pipeline leading to the newly constructed rainwater storage tank; the newly constructed upgraded stormwater storage tank is located downstream of the newly constructed sedimentation well and connected between the newly constructed sedimentation well and the municipal rainwater pipeline, and a newly constructed gate is installed on the pipeline leading to the newly constructed upgraded stormwater storage tank.

[0014] Optionally, the newly constructed stormwater storage system includes the newly constructed initial stormwater storage tank and the newly constructed upgraded stormwater storage tank. The stormwater system also includes a newly constructed diversion well, which is located downstream of the newly constructed sedimentation well and connected to the sedimentation well via a pipeline. Both the newly constructed initial stormwater storage tank and the newly constructed upgraded stormwater storage tank are located downstream of the newly constructed diversion well. The newly constructed initial stormwater storage tank is connected between the newly constructed diversion well and the municipal sewage pipeline, and the newly constructed upgraded stormwater storage tank is connected between the newly constructed diversion well and the municipal stormwater pipeline.

[0015] Optionally, when the newly built storage tank system includes multiple newly built storage tanks, the multiple newly built storage tanks may be set up separately or jointly.

[0016] Optionally, the combined construction can be laid out flat or stacked vertically.

[0017] This invention also provides a method for upgrading and controlling pollution in a source stormwater system. The method involves adding a new sedimentation well, a new regulating tank system, a new flap gate, and a new sluice gate to the existing stormwater system. The new sedimentation well is located downstream of the existing stormwater well and connected to it via a pipeline. The existing stormwater outlet pipeline is located downstream of the new sedimentation well and connected to the municipal stormwater pipeline. The new sluice gate is installed on the existing stormwater outlet pipeline. The new regulating tank system includes at least one new regulating tank, located downstream of the new sedimentation well and connected to the municipal stormwater pipeline or municipal sewage pipeline. An air venting pump is installed at the outlet of the new regulating tank. The new flap gate is located downstream of the new regulating tank system and the existing stormwater outlet pipeline to prevent backflow of water from the external municipal stormwater network into the internal stormwater system.

[0018] Optionally, the newly constructed stormwater storage system includes at least one of a newly constructed initial stormwater storage tank, a newly constructed rainwater storage tank, and a newly constructed upgraded stormwater storage tank; the newly constructed initial stormwater storage tank is located downstream of the newly constructed sedimentation well and connected between the newly constructed sedimentation well and the municipal sewage pipeline, and a newly constructed gate is installed on the pipeline leading to the newly constructed initial stormwater storage tank; the newly constructed rainwater storage tank is located downstream of the newly constructed sedimentation well and connected between the newly constructed sedimentation well and the municipal rainwater pipeline, and a newly constructed gate is installed on the pipeline leading to the newly constructed rainwater storage tank; the newly constructed upgraded stormwater storage tank is located downstream of the newly constructed sedimentation well and connected between the newly constructed sedimentation well and the municipal rainwater pipeline, and a newly constructed gate is installed on the pipeline leading to the newly constructed upgraded stormwater storage tank.

[0019] Optionally, the newly constructed stormwater storage system includes the newly constructed initial stormwater storage tank and the newly constructed upgraded stormwater storage tank. The method for upgrading and controlling pollution in the source stormwater system further includes adding a newly constructed diversion well to the existing stormwater system. The newly constructed diversion well is located downstream of the newly constructed sedimentation well and is connected to the newly constructed sedimentation well via a pipeline. Both the newly constructed initial stormwater storage tank and the newly constructed upgraded stormwater storage tank are located downstream of the newly constructed diversion well. The newly constructed initial stormwater storage tank is connected between the newly constructed diversion well and the municipal sewage pipeline, and the newly constructed upgraded stormwater storage tank is connected between the newly constructed diversion well and the municipal stormwater pipeline.

[0020] Optionally, the newly constructed stormwater storage system includes the newly constructed initial stormwater storage tank, the newly constructed initial stormwater storage tank, and the newly constructed upgraded stormwater storage tank, wherein:

[0021] In the initial stage of rainfall: open the newly built gate on the pipeline leading to the newly built initial rainwater storage tank, close the newly built gate on the pipeline leading to the newly built rainwater storage tank, close the newly built gate on the pipeline leading to the newly built upgraded storage tank, and close the newly built gate on the existing rainwater outlet pipeline, so that the initial rainwater flows into the newly built initial rainwater storage tank. When the water level in the newly built initial rainwater storage tank reaches the preset water level, close the newly built gate on the pipeline leading to the newly built initial rainwater storage tank.

[0022] During the later stages of rainfall: Keep the newly built gates on the pipeline leading to the newly built initial rainwater storage tank closed, open the newly built gates on the pipeline leading to the newly built rainwater storage tank, open the newly built gates on the pipeline leading to the newly built upgraded storage tank, and open the newly built gates on the existing rainwater outlet pipeline. When the water level in the municipal rainwater pipeline is low, the internal rainwater is directly discharged into the municipal rainwater network; when the water level in the municipal rainwater pipeline is high, the internal rainwater first enters the newly built rainwater storage tank for storage; when the rainfall exceeds the design standard of the existing drainage system, the internal rainwater enters the newly built upgraded storage tank.

[0023] After the rainfall ends: close all gates, discharge the sewage in the newly built initial rainwater storage tank into the municipal sewage system in a staggered manner, and discharge the rainwater in the newly built rainwater storage tank and the newly built upgraded storage tank into the municipal rainwater system within a preset time.

[0024] Optionally, after the rainfall ends, the sewage in the newly built initial rainwater storage tank is discharged into the municipal sewage system 24-48 hours later, and the rainwater in the newly built rainwater storage tank and the newly built upgraded storage tank is discharged into the municipal rainwater system within 24 hours.

[0025] As described above, the present invention provides a rainwater system and a method for upgrading and controlling pollution in the source rainwater system. The rainwater system includes an existing rainwater well, a newly built sedimentation well, an existing rainwater outlet pipe, a newly built regulating tank system, and a newly built flap valve. The newly built regulating tank system includes at least one newly built regulating tank located downstream of the newly built sedimentation well and connected between the newly built sedimentation well and the municipal rainwater pipe or municipal sewage pipe. The outlet end of the newly built regulating tank is equipped with an air venting pump. The newly built flap valve is located downstream of the newly built regulating tank system and the existing rainwater outlet pipe to prevent water from the external municipal rainwater network from flowing back into the internal rainwater system. This invention, while fully utilizing existing municipal stormwater drainage pipes and pumping stations, controls stormwater runoff and pollution at the source site by constructing new regulating reservoirs and connecting pipes at the end of the stormwater system. Combined with the control of opening and closing gates, this approach upgrades the stormwater drainage system at the source site and controls initial stormwater runoff. It also reduces the peak flow of downstream municipal stormwater drainage systems, minimizing the need for reconstruction of downstream stormwater drainage pipes and pumping stations, thus saving on investment. In addition to improving regional flood control and urban water quality, this invention also offers significant economic benefits. Attached Figure Description

[0026] Figure 1 The diagram shown is a distribution network diagram of the rainwater system of the present invention in one example.

[0027] Figure 2 This is a flowchart showing the operation of the modified source rainwater system during the initial stage of rainfall.

[0028] Figure 3 This is a flowchart showing the operation of the modified source rainwater system during the middle and later stages of rainfall.

[0029] Figure 4 This is a flowchart showing the operation of the modified rainwater source system after rainfall.

[0030] Component designation explanation

[0031] 1. Existing rainwater wells

[0032] 2. Construction of new sedimentation wells

[0033] 3. Existing rainwater drainage pipes

[0034] 4. Construct a new regulating reservoir system

[0035] 401 New First Rainwater Storage Tank

[0036] 402 New rainwater storage tank

[0037] 403 New upgraded regulating reservoir

[0038] 5. Construct a new flap gate

[0039] 6. Municipal stormwater pipes

[0040] New gates 701, 702, 703, and 704

[0041] 8. Municipal sewage pipelines

[0042] 901, 902, 903 Venting Pumps

[0043] 10. New diversion wells Detailed Implementation

[0044] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0045] Please see Figures 1 to 4 It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0046] Example 1

[0047] This embodiment provides a rainwater system; please refer to [link / reference]. Figure 1 The diagram shows the distribution network of the rainwater system in one example, including existing rainwater wells 1, newly built sedimentation wells 2, existing rainwater outlet pipes 3, newly built storage tank system 4, and newly built flap gates 5.

[0048] Specifically, the newly constructed sedimentation well 2 is located downstream of the existing rainwater well 1 and is connected to the existing rainwater well 1 via a pipeline. The newly constructed sedimentation well 2 is used to remove some of the mud, sand, leaves, and other foreign objects from the rainwater, thereby reducing the amount of foreign objects entering subsequent facilities and thus reducing the frequency of operation and maintenance of subsequent facilities.

[0049] Specifically, the existing rainwater outlet pipe 3 is located downstream of the newly built sedimentation well 2 and is connected between the newly built sedimentation well 2 and the municipal rainwater pipe 6. A new gate 701 is installed on the existing rainwater outlet pipe 3.

[0050] Specifically, the newly built regulating reservoir system 4 includes at least one newly built regulating reservoir, which is located downstream of the newly built sedimentation well 2 and connected between the newly built sedimentation well 2 and the municipal rainwater pipe 6 or the municipal sewage pipe 8. The outlet end of the newly built regulating reservoir is equipped with an air release pump.

[0051] As an example, new gates are installed on the pipelines leading to each newly built storage tank. By opening or closing each gate, the direction of rainwater flow can be controlled.

[0052] As an example, the newly built stormwater storage system 4 includes at least one of the following: a newly built initial rainwater storage tank 401, a newly built rainwater storage tank 402, and a newly built upgraded stormwater storage tank 403. Specifically, 1 to 3 of these items can be freely combined based on the actual situation of the existing drainage system and the problems that need to be solved.

[0053] Specifically, the newly constructed initial rainwater storage tank 401 is located downstream of the newly constructed sedimentation well 2 and connected between the newly constructed sedimentation well 2 and the municipal sewage pipeline 8. The newly constructed initial rainwater storage tank 401 is used to intercept mixed sewage and initial rainwater during the dry season, reducing pollution from initial rainwater discharge into the river. A newly constructed gate valve 702 is installed on the pipeline leading to the newly constructed initial rainwater storage tank 401, and an air venting pump 901 is installed at the outlet of the newly constructed initial rainwater storage tank 401.

[0054] Specifically, the newly constructed rainwater storage tank 402 is located downstream of the newly constructed sedimentation well 2 and connected between the newly constructed sedimentation well 2 and the municipal rainwater pipe 6. A newly constructed gate 703 is installed on the pipe leading to the newly constructed rainwater storage tank 402, and an air release pump 902 is installed at the outlet of the newly constructed rainwater storage tank 402. In actual operation, if the external municipal rainwater pipe network is at a high water level, the internal rainwater can be temporarily discharged into the newly constructed rainwater storage tank 402. When the municipal rainwater pipe network is at a low water level, the rainwater stored in the newly constructed rainwater storage tank 402 can be discharged into the municipal rainwater pipe network, thereby solving the problem of poor internal rainwater drainage caused by the high water level of the external municipal rainwater pipe network.

[0055] Specifically, the newly constructed upgraded stormwater storage tank 403 is located downstream of the newly constructed sedimentation well 2 and connected between the newly constructed sedimentation well 2 and the municipal stormwater pipe 6. A newly constructed gate 704 is installed on the pipe leading to the newly constructed upgraded stormwater storage tank 403, and an air release pump 903 is installed at the outlet of the newly constructed upgraded stormwater storage tank 403. In actual operation, when rainfall exceeds the drainage capacity of the existing drainage system, the newly constructed upgraded stormwater storage tank 403 can be activated, that is, the internal rainwater can be temporarily discharged into the newly constructed upgraded stormwater storage tank 403. After the rainfall intensity decreases or after the rain, the rainwater in the newly constructed upgraded stormwater storage tank 403 can be discharged into the municipal stormwater pipe network, thereby achieving the purpose of improving the drainage standard of the internal drainage system and reducing the peak flow of the downstream municipal stormwater system.

[0056] In some embodiments, the newly constructed stormwater storage system 4 includes both the newly constructed initial stormwater storage tank 401 and the newly constructed upgraded stormwater storage tank 403. In this case, the stormwater system also includes a newly constructed diversion well 10 for switching stormwater between the newly constructed initial stormwater storage tank 401 and the newly constructed upgraded stormwater storage tank 403. The newly constructed diversion well 10 is located downstream of the newly constructed sedimentation well 2 and is connected to the newly constructed sedimentation well 2 via a pipeline. Both the newly constructed initial stormwater storage tank 401 and the newly constructed upgraded stormwater storage tank 403 are located downstream of the newly constructed diversion well. The newly constructed initial stormwater storage tank 401 is connected between the newly constructed diversion well 10 and the municipal sewage pipeline 8, and the newly constructed upgraded stormwater storage tank 403 is connected between the newly constructed diversion well 10 and the municipal stormwater pipeline 6.

[0057] Specifically, when the newly built storage tank system 4 includes multiple newly built storage tanks, the multiple newly built storage tanks can be set up separately or together. If they are set up together, they can be laid out flat or stacked vertically to save land.

[0058] As an example, newly built water storage tanks can be constructed using either cast-in-place methods or prefabricated methods.

[0059] Specifically, the newly constructed flap gate 5 is located downstream of the newly constructed regulating reservoir system 4 and the existing rainwater outlet pipe 3, and is used to prevent water from the external municipal rainwater network from flowing back into the internal rainwater system. The flap gate is a check valve installed at the end of a drainage pipe, which prevents backflow of external water. It mainly consists of four parts: a valve seat, a valve plate, a water seal ring, and a hinge, and its shape can be circular or square.

[0060] In this embodiment, before the rainwater system at the source site is discharged into the municipal rainwater pipe network, facilities such as regulating tanks, sedimentation wells, diversion wells, and gates are installed to achieve the purpose of upgrading and controlling pollution of the rainwater system at the source.

[0061] Example 2

[0062] This embodiment provides a method for upgrading and controlling pollution in a source-level stormwater system. The method involves adding new sedimentation wells, new storage tank systems, new flap gates, and new sluice gates to the existing stormwater system, thereby improving the standards of the existing stormwater drainage system at the source site and controlling surface runoff pollution.

[0063] As an example, see Example 1. Figure 1 This is a distribution network diagram of the modified source rainwater system.

[0064] Specifically, the newly constructed sedimentation well 2 is located downstream of the existing rainwater well 1 and is connected to the existing rainwater well 1 via a pipeline. The existing rainwater outlet pipe 3 is located downstream of the newly constructed sedimentation well 2 and is connected between the newly constructed sedimentation well 2 and the municipal rainwater pipe 6. The newly constructed gate 701 is installed on the existing rainwater outlet pipe 3. The newly constructed regulating tank system 4 includes at least one newly constructed regulating tank. The newly constructed regulating tank is located downstream of the newly constructed sedimentation well 2 and is connected between the newly constructed sedimentation well 2 and the municipal rainwater pipe 6 or the municipal sewage pipe 8. The outlet end of the newly constructed regulating tank is equipped with an air release pump. The newly constructed flap gate 5 is installed downstream of the newly constructed regulating tank system 4 and the existing rainwater outlet pipe 3 to prevent water from the external municipal rainwater network from flowing back into the internal rainwater system.

[0065] As an example, the newly built stormwater storage system 4 includes at least one of the following: a newly built initial rainwater storage tank 401, a newly built rainwater storage tank 402, and a newly built upgraded stormwater storage tank 403. Specifically, 1 to 3 of these items can be freely combined based on the actual situation of the existing drainage system and the problems that need to be solved.

[0066] Specifically, the newly constructed initial rainwater storage tank 401 is located downstream of the newly constructed sedimentation well 2 and connected between the newly constructed sedimentation well 2 and the municipal sewage pipeline 8. The newly constructed initial rainwater storage tank 401 is used to intercept mixed sewage and initial rainwater during the dry season, reducing pollution from initial rainwater discharge into the river. A newly constructed gate valve 702 is installed on the pipeline leading to the newly constructed initial rainwater storage tank 401, and an emptying pump 901 is installed at the outlet of the newly constructed initial rainwater storage tank 401. The newly constructed rainwater storage tank 402 is located downstream of the newly constructed sedimentation well 2 and connected between the newly constructed sedimentation well 2 and the municipal rainwater pipeline 6. A newly constructed gate valve 703 is installed on the pipeline leading to the newly constructed rainwater storage tank 402, and an emptying pump 902 is installed at the outlet of the newly constructed rainwater storage tank 402. In actual operation, if the external municipal stormwater pipe network is at a high water level, the internal rainwater can be temporarily discharged into the newly built stormwater storage tank 402. When the municipal stormwater pipe network is at a low water level, the rainwater stored in the newly built stormwater storage tank 402 can be discharged into the municipal stormwater pipe network, thereby solving the problem of poor internal rainwater drainage caused by the high water level of the external municipal stormwater pipe network. The newly built upgraded storage tank 403 is located downstream of the newly built sedimentation well 2 and is connected between the newly built sedimentation well 2 and the municipal stormwater pipe 6. A newly built gate 704 is installed on the pipeline leading to the newly built upgraded storage tank 403, and an air release pump 903 is installed at the outlet of the newly built upgraded storage tank 403. In actual operation, when rainfall exceeds the drainage capacity of the existing drainage system, the newly built upgraded storage tank 403 can be activated. This means that internal rainwater can be temporarily discharged into the newly built upgraded storage tank 403. Once the rainfall intensity decreases or after the rain, the rainwater in the newly built upgraded storage tank 403 can then be discharged into the municipal stormwater network. This achieves the purpose of improving the drainage standard of the internal drainage system and reducing the peak flow of the downstream municipal stormwater system. The direction of rainwater flow can be controlled by combining the opening and closing of each gate.

[0067] In one implementation, the newly built stormwater storage system 4 includes both the newly built initial stormwater storage tank 401 and the newly built upgraded stormwater storage tank 403. In this case, the stormwater system also includes a newly built diversion well 10 for switching stormwater between the newly built initial stormwater storage tank 401 and the newly built upgraded stormwater storage tank 403. The newly built diversion well 10 is located downstream of the newly built sedimentation well 2 and is connected to the newly built sedimentation well 2 via a pipeline. Both the newly built initial stormwater storage tank 401 and the newly built upgraded stormwater storage tank 403 are located downstream of the newly built diversion well. The newly built initial stormwater storage tank 401 is connected between the newly built diversion well 10 and the municipal sewage pipeline 8, and the newly built upgraded stormwater storage tank 403 is connected between the newly built diversion well 10 and the municipal stormwater pipeline 6.

[0068] In another implementation, the newly built stormwater storage system includes the newly built initial stormwater storage tank, the newly built initial stormwater storage tank, and the newly built upgraded stormwater storage tank. The following uses this scenario as an example to illustrate the operation process of the modified source stormwater system.

[0069] (1) Please refer to Figure 2 The diagram shows the operation flow of the modified source rainwater system during the initial stage of rainfall (the direction of water flow is represented by solid lines). During the initial stage of rainfall, the newly built gate on the pipeline leading to the newly built initial rainwater storage tank is opened, the newly built gate on the pipeline leading to the newly built rainwater storage tank is closed, the newly built gate on the pipeline leading to the newly built upgraded storage tank is closed, and the newly built gate on the existing rainwater outlet pipeline is closed, allowing the initial rainwater to flow into the newly built initial rainwater storage tank. When the water level in the newly built initial rainwater storage tank reaches the preset water level (e.g., the set maximum water level), the newly built gate on the pipeline leading to the newly built initial rainwater storage tank is closed.

[0070] (2) Please refer to Figure 3 The diagram shows the operational flow of the upgraded source rainwater system during the middle and later stages of rainfall. During these stages, the newly constructed gates on the pipeline leading to the newly built initial rainwater storage tank remain closed. The newly constructed gates on the pipeline leading to the newly built rainwater storage tank, the newly constructed gates on the pipeline leading to the newly built upgraded storage tank, and the newly constructed gates on the existing rainwater outlet pipeline are all opened. When the municipal rainwater pipeline water level is low, the internal rainwater is directly discharged into the municipal rainwater network. When the municipal rainwater pipeline water level is high, the internal rainwater first enters the newly built rainwater storage tank for storage. When the rainfall exceeds the design standard of the existing drainage system, the internal rainwater enters the newly built upgraded storage tank.

[0071] (3) Please refer to Figure 4 The diagram shows the operation flow of the modified source rainwater system after rainfall. After rainfall, all gates are closed, and the sewage in the newly built initial rainwater storage tank is discharged into the municipal sewage system in a staggered manner. The rainwater in the newly built rainwater storage tank and the newly built upgraded storage tank is discharged into the municipal rainwater system within a preset time.

[0072] As an example, after rainfall ends, the sewage in the newly built initial rainwater storage tank will be discharged into the municipal sewage system 24-48 hours later, and the rainwater in the newly built rainwater storage tank and the newly built upgraded storage tank will be discharged into the municipal rainwater system within 24 hours.

[0073] This embodiment of the method for upgrading and controlling pollution in the source rainwater system fully preserves and utilizes existing municipal rainwater drainage pipes and rainwater pumping stations. By constructing a new regulating reservoir and connecting pipes at the end of the rainwater system in the source area, and by controlling the opening or closing of each gate, the method can control the runoff volume and runoff pollution of the source area rainwater. This can reduce the peak flow of the downstream municipal rainwater system and reduce the pollution of initial rainwater discharge into the river.

[0074] In summary, the present invention provides a rainwater system and a method for upgrading and controlling pollution in the source rainwater system. The rainwater system includes an existing rainwater well, a newly built sedimentation well, an existing rainwater outlet pipe, a newly built regulating tank system, and a newly built flap valve. The newly built regulating tank system includes at least one newly built regulating tank located downstream of the newly built sedimentation well and connected between the newly built sedimentation well and the municipal rainwater pipe or municipal sewage pipe. The outlet end of the newly built regulating tank is equipped with an air venting pump. The newly built flap valve is located downstream of the newly built regulating tank system and the existing rainwater outlet pipe to prevent water from the external municipal rainwater network from flowing back into the internal rainwater system. This invention, while fully utilizing existing municipal stormwater drainage pipes and pumping stations, controls stormwater runoff and pollution at the source site by constructing a new regulating reservoir and connecting pipelines at the end of the stormwater system. Combined with the control of opening and closing gates, this approach upgrades the source site's stormwater drainage system and controls initial stormwater runoff. It also reduces peak flow in downstream municipal stormwater drainage systems, minimizing the need for reconstruction of downstream pipes and pumping stations, thus saving on investment. This invention offers significant economic benefits, improving regional flood control and urban water quality. Therefore, it effectively overcomes the shortcomings of existing technologies and possesses high industrial application value.

[0075] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A rainwater system, characterized in that, include: Existing rainwater wells; A new sedimentation well is constructed, located downstream of the existing rainwater well and connected to the existing rainwater well via a pipeline; The existing rainwater outlet pipe is located downstream of the newly built sedimentation well and connected between the newly built sedimentation well and the municipal rainwater pipe. A new gate is installed on the existing rainwater outlet pipe. A new regulating reservoir system includes at least one new regulating reservoir, which is located downstream of the new sedimentation well and connected between the new sedimentation well and the municipal stormwater pipe or municipal sewage pipe. The outlet end of the new regulating reservoir is equipped with an air venting pump. A new flap gate is installed downstream of the newly built stormwater storage tank system and the existing stormwater outlet pipe to prevent water from the external municipal stormwater network from flowing back into the internal stormwater system. The newly constructed stormwater storage system includes a newly constructed initial stormwater storage tank, a newly constructed rainwater storage tank, and a newly constructed upgraded stormwater storage tank. The newly constructed initial stormwater storage tank is located downstream of the newly constructed sedimentation well and connected between the newly constructed sedimentation well and the municipal sewage pipeline. A newly constructed gate is installed on the pipeline leading to the newly constructed initial stormwater storage tank. The newly constructed rainwater storage tank is located downstream of the newly constructed sedimentation well and connected between the newly constructed sedimentation well and the municipal rainwater pipeline. A newly constructed gate is installed on the pipeline leading to the newly constructed rainwater storage tank. The newly constructed upgraded stormwater storage tank is located downstream of the newly constructed sedimentation well and connected between the newly constructed sedimentation well and the municipal rainwater pipeline. A newly constructed gate is installed on the pipeline leading to the newly constructed upgraded stormwater storage tank. The rainwater system also includes a newly built diversion well, which is located downstream of the newly built sedimentation well and connected to the newly built sedimentation well via a pipeline. The newly built initial rainwater storage tank and the newly built upgraded storage tank are both located downstream of the newly built diversion well. The newly built initial rainwater storage tank is connected between the newly built diversion well and the municipal sewage pipeline, and the newly built upgraded storage tank is connected between the newly built diversion well and the municipal rainwater pipeline.

2. The rainwater system according to claim 1, characterized in that: When the newly built storage tank system includes multiple newly built storage tanks, the multiple newly built storage tanks may be set up separately or jointly.

3. The rainwater system according to claim 2, characterized in that: The combined construction can be laid out flat or stacked vertically.

4. A method for upgrading and controlling pollution in a source-based rainwater system, characterized in that: The existing stormwater system is supplemented with a newly constructed sedimentation well, a newly constructed stormwater storage tank system, a newly constructed flap gate, and a newly constructed sluice gate. The newly constructed sedimentation well is located downstream of the existing stormwater well and connected to it via a pipeline. The existing stormwater outlet pipeline is located downstream of the newly constructed sedimentation well and connected to the municipal stormwater pipeline. The newly constructed sluice gate is installed on the existing stormwater outlet pipeline. The newly constructed stormwater storage tank system includes at least one newly constructed storage tank, located downstream of the newly constructed sedimentation well and connected to the municipal stormwater pipeline or municipal sewage pipeline. An air venting pump is installed at the outlet of the newly constructed storage tank. The newly constructed flap gate is located downstream of the newly constructed storage tank system and the existing stormwater outlet pipeline to prevent backflow of water from the external municipal stormwater network into the internal stormwater system. The newly constructed stormwater storage tank system includes a newly constructed initial stormwater storage tank, a newly constructed stormwater storage tank, and a newly constructed upgraded storage tank. The newly constructed initial stormwater storage tank is located downstream of the newly constructed sedimentation well. Downstream and connected to the newly built sedimentation well and the municipal sewage pipeline, a new gate is installed on the pipeline leading to the newly built initial rainwater storage tank; the newly built rainwater storage tank is located downstream of the newly built sedimentation well and connected to the municipal rainwater pipeline, and a new gate is installed on the pipeline leading to the newly built rainwater storage tank; the newly built upgraded storage tank is located downstream of the newly built sedimentation well and connected to the municipal rainwater pipeline, and a new gate is installed on the pipeline leading to the newly built upgraded storage tank; the method for upgrading and controlling pollution in the source rainwater system also includes adding a newly built diversion well to the existing rainwater system, the newly built diversion well being located downstream of the newly built sedimentation well and connected to the newly built sedimentation well via a pipeline, the newly built initial rainwater storage tank and the newly built upgraded storage tank both being located downstream of the newly built diversion well, the newly built initial rainwater storage tank being connected to the newly built diversion well and the municipal sewage pipeline, and the newly built upgraded storage tank being connected to the newly built diversion well and the municipal rainwater pipeline.

5. The method for upgrading and controlling pollution in a source-based rainwater system according to claim 4, characterized in that, The newly constructed stormwater storage system includes the newly constructed initial stormwater storage tank, the newly constructed initial stormwater storage tank, and the newly constructed upgraded stormwater storage tank, wherein: In the initial stage of rainfall: open the newly built gate on the pipeline leading to the newly built initial rainwater storage tank, close the newly built gate on the pipeline leading to the newly built rainwater storage tank, close the newly built gate on the pipeline leading to the newly built upgraded storage tank, and close the newly built gate on the existing rainwater outlet pipeline, so that the initial rainwater flows into the newly built initial rainwater storage tank. When the water level in the newly built initial rainwater storage tank reaches the preset water level, close the newly built gate on the pipeline leading to the newly built initial rainwater storage tank. During the later stages of rainfall: Keep the newly built gates on the pipeline leading to the newly built initial rainwater storage tank closed, open the newly built gates on the pipeline leading to the newly built rainwater storage tank, open the newly built gates on the pipeline leading to the newly built upgraded storage tank, and open the newly built gates on the existing rainwater outlet pipeline. When the water level in the municipal rainwater pipeline is low, the internal rainwater is directly discharged into the municipal rainwater network; when the water level in the municipal rainwater pipeline is high, the internal rainwater first enters the newly built rainwater storage tank for storage; when the rainfall exceeds the design standard of the existing drainage system, the internal rainwater enters the newly built upgraded storage tank. After the rainfall ends: close all gates, discharge the sewage in the newly built initial rainwater storage tank into the municipal sewage system in a staggered manner, and discharge the rainwater in the newly built rainwater storage tank and the newly built upgraded storage tank into the municipal rainwater system within a preset time.

6. The method for upgrading and controlling pollution in a source-based rainwater system according to claim 5, characterized in that: After the rainfall ends, the sewage in the newly built initial rainwater storage tank will be discharged into the municipal sewage system 24-48 hours later, and the rainwater in the newly built rainwater storage tank and the newly built upgraded storage tank will be discharged into the municipal rainwater system within 24 hours.

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