Rainwater pipeline infiltration drainage method, system, device and electronic equipment suitable for sponge city

Abstract

This invention discloses a method, system, device, and electronic equipment for rainwater infiltration drainage in sponge cities, relating to the field of rainwater pipe network infiltration drainage technology. The invention utilizes a double-layered rainwater pipe structure, intelligently controlling solenoid valves based on rainfall intensity and water level signals. Through multi-parameter coordinated control, the inner solenoid valve opens at the initial stage of rainfall, allowing rainwater to enter the inner pipe. When the rainfall exceeds the inner layer's drainage capacity, the outer solenoid valve opens, allowing rainwater to enter the porous outer pipe for filtration, purification, and infiltration into the soil. A rainwater recycling device is installed at the end of the pipe; rainwater that meets quality standards is collected, while polluted rainwater that does not meet standards flows back to the outer pipe for further purification, achieving precise rainwater recycling. This method, through double-layer intelligent diversion, multi-parameter coordinated control, closed-loop water quality management, and anti-clogging design, achieves breakthroughs in ecological benefits, economic benefits, and technical precision, and has broad application value.

Description

Technical Field

[0001] This invention relates to the field of rainwater pipe network infiltration and drainage technology, specifically to a method for rainwater discharge and recycling based on sponge cities that corresponds to the core requirements of infiltration, retention, storage, purification, utilization, and drainage in sponge city construction. Background Technology

[0002] With the deepening of the concept of sponge city construction, the efficient utilization of urban rainwater resources and the prevention and control of urban flooding have become the core demands of urban ecological construction. As a key infrastructure for sponge city construction, the performance of rainwater infiltration drainage system directly affects the achievement of rainwater management goals. To solve this problem, various rainwater infiltration and recycling solutions have been developed in related fields.

[0003] Chinese patent (publication number CN111733657B) discloses a double-layer rainwater drainage ditch and its construction method. The method includes a lower rainwater ditch and an upper rainwater ditch. The bottom surface of the upper rainwater ditch is provided with an outlet and a liquid level sensor is provided at the top. The lower layer is provided with a baffle plate. The baffle plate is controlled by a controller that connects the liquid level sensor and the drive mechanism to ensure that rainwater is quickly discharged to the river and downstream facilities. However, this method only controls the opening of the baffle plate through the liquid level sensor, which cannot cope with the changes in diversion demand caused by fluctuations in rainfall intensity. Furthermore, it does not design a protection and early warning mechanism for problems such as soil particle blockage and pipe siltation. It is easily blocked by impurities, which affects the long-term stable operation of the system.

[0004] Chinese patent (publication number CN119913969B) discloses an integrated rainwater infiltration and drainage system for sponge cities. This system is used to replace rainwater grates at road intersections and includes a vertically arranged infiltration and drainage group, a storage group, and a discharge box. The infiltration and drainage group intercepts debris and infiltrates and adsorbs particulate matter, while the storage group stores water and discharges it through a water storage capsule, thereby reducing drainage pressure and rainwater pollution. However, the system only achieves preliminary infiltration and filtration, does not accurately detect the quality of the purified rainwater, and does not set up a circulation and purification path for rainwater that does not meet the standards, making it difficult to guarantee the quality of reused water.

[0005] Therefore, there is an urgent need to develop a rainwater pipe infiltration drainage technology with intelligent diversion and control, precise water quality monitoring, circulation purification and stable operation capabilities to solve the shortcomings of existing technologies and promote the improvement of the quality and efficiency of rainwater resource utilization in sponge cities. Summary of the Invention

[0006] Based on the aforementioned technical problems, this application discloses a method for rainwater pipe infiltration drainage suitable for sponge cities, specifically including:

[0007] With a double-layered rainwater pipe structure, at the beginning of rainfall, the solenoid valve at the inlet of the inner pipe is opened, allowing rainwater to enter the inner pipe.

[0008] When the rainfall exceeds the drainage capacity of the inner pipe, the solenoid valve at the inlet of the outer pipe is opened, and the rainwater enters the outer pipe. The rainwater is filtered and purified through the pores on the outer pipe, and the excess rainwater is infiltrated into the surrounding soil.

[0009] A rainwater recycling device is installed at the end of the double-layer rainwater pipe to test the quality of the rainwater after infiltration and purification, and collect the rainwater after it meets the standards.

[0010] Substandard rainwater is controlled to flow back into the outer pipe for further infiltration and purification, thus achieving precise recycling of rainwater resources.

[0011] Preferably, the opening of the solenoid valve is automatically controlled by the drainage control module based on feedback signals from real-time rainfall intensity, pipeline water level sensor, and flow meter, achieving intelligent response to rainwater diversion, specifically:

[0012] If the flow rate suddenly increases, determine whether to activate emergency diversion based on the water level. Set a preset rainfall intensity threshold and collect rainfall intensity data in real time. When the rainfall intensity exceeds the initial rainfall intensity threshold, open the initial rainwater interception valve in advance to divert the heavily polluted initial rainwater into the storage tank or treatment facility. When the rainfall intensity remains low, close the interception valve to allow the rainwater to be discharged directly, avoiding frequent system operation.

[0013] If the flow rate is stable but the water level is high, it indicates that the pipeline may be blocked. Based on the water level adjustment valve strategy, a high water level threshold and a safe water level threshold are preset in the pipeline. When the water level in the pipeline is greater than the high water level threshold, the diversion valve or overflow valve is opened to prevent flooding; when the water level is less than the safe water level threshold, the overflow valve is closed to restore the normal diversion path.

[0014] Preferably, the rainwater recycling device specifically comprises a primary filtration unit, an infiltration purification unit, an online water quality monitoring unit, an automatic diversion unit, and a water storage tank;

[0015] The primary filtration unit is used to divert rainwater containing high levels of pollutants in the early stages of the diversion process; the infiltration purification unit is used to remove pollutants from the rainwater; the online water quality monitoring unit is used to monitor key indicators of the rainwater after infiltration filtration; and the automatic diversion unit is used to automatically switch the flow direction based on the comprehensive water quality monitoring results.

[0016] Preferably, the key indicators for monitoring rainwater after infiltration and filtration are as follows:

[0017] The suspended solids (SS) index of the infiltrated water was monitored by a turbidity meter, the COD index of the infiltrated water was monitored by a chemical oxygen demand (COD) meter, the electrical conductivity (EC) index of the infiltrated water was monitored by a conductivity sensor, and the oil content (OIL) index of the infiltrated water was monitored by a fluorescence method.

[0018] The comprehensive pollution index is determined by weighting the types of pollution in the local area according to their severity, and combining them with the benchmark pollution index.

[0019] Preferably, the automatic switching of flow direction based on water quality monitoring results specifically refers to:

[0020] Preset thresholds for suspended solids, COD, conductivity, oil, and comprehensive pollution index;

[0021] If any key indicator exceeds the corresponding preset threshold, it is determined to be polluted rainwater. The polluted rainwater is then transported back to the upstream section of the outer pipe through a return pump, allowing it to undergo secondary infiltration and purification through the pores of the outer pipe and the surrounding soil until the water quality meets the standards.

[0022] The described rainwater infiltration drainage system for sponge cities includes a double-layered rainwater pipe structure, an electromagnetic control valve, a rainwater recycling device, and a rainwater infiltration drainage control module, specifically:

[0023] A double-layered rainwater pipe includes an inner pipe and an outer pipe that is fitted around its perimeter.

[0024] The electromagnetic control valve includes a first electromagnetic valve installed at the inlet of the inner layer of the double-layer rainwater pipe, and a second electromagnetic valve installed at the inlet of the outer layer of the double-layer rainwater pipe.

[0025] The rainwater harvesting and recycling device is installed at the end of the double-layer rainwater pipe. It is used to test the water quality of the rainwater after it has been purified by infiltration through the outer layer of the pipe, and to collect or recycle the rainwater according to the test results.

[0026] The rainwater pipe infiltration drainage control module is connected to an electromagnetic control valve and a rainwater recycling device, and is used to control the electromagnetic control valve and the rainwater recycling device to achieve precise recycling of rainwater resources.

[0027] Preferably, the precise recycling of rainwater resources is achieved as follows: the rainwater pipe infiltration drainage control module controls the opening of the first solenoid valve at the beginning of rainfall, allowing rainwater to enter the inner pipe; when the rainfall exceeds the drainage capacity of the inner pipe, it controls the opening of the second solenoid valve, allowing rainwater to enter the outer pipe, where it is filtered and purified through pores and then infiltrates into the surrounding soil; simultaneously, based on the water quality information fed back by the rainwater recycling device, it controls the non-compliant rainwater to flow back to the upstream section of the outer pipe for further infiltration and purification.

[0028] The described rainwater infiltration drainage device for sponge cities includes a permeable pipe body, a permeable geotextile layer, a permeable filling layer, a rainwater collection inlet, and an infiltration control valve, specifically:

[0029] The permeable pipe body is made of porous permeable material, and the pipe wall has regularly distributed seepage holes;

[0030] The permeable geotextile layer is wrapped around the periphery of the permeable pipe body to prevent soil particles from entering the pipe and causing blockage.

[0031] The permeable filling layer is disposed around the permeable pipe body and is composed of crushed stone or gravel with a reasonable particle size distribution, which is used to enhance the lateral infiltration and temporary storage capacity of rainwater.

[0032] The rainwater collection inlet is connected to the permeable pipe body and is used to connect to the rainwater pipe network;

[0033] The seepage control valve is installed on the side wall of the permeable pipe body and is used to dynamically adjust the seepage rate according to the soil moisture content or groundwater level to prevent groundwater backflow.

[0034] One type of electronic device includes a processor, a memory, and a computer program stored in the memory and executable on the processor, specifically:

[0035] The processor receives real-time data from a rainfall intensity sensor, a pipeline water level sensor, a flow meter, and an online water quality monitoring unit;

[0036] Based on the preset control logic and threshold model, the opening and closing status of the solenoid valves at the inlet of the inner and outer pipes is dynamically adjusted to achieve coordinated control of rainwater diversion, infiltration purification and emergency overflow.

[0037] Based on the water quality monitoring results, it is determined whether the rainwater meets the standards. If it does not meet the standards, a backflow command is generated to control the backflow pump to transport the rainwater to the upstream section of the outer pipe for secondary infiltration and purification.

[0038] Meanwhile, the system's operating status, water quality data, and control logs are uploaded to the cloud management platform, supporting remote monitoring and intelligent optimization scheduling.

[0039] Compared with the prior art, the technical solution of this application has the following technical effects:

[0040] This invention combines a drainage control module with real-time rainfall intensity, pipeline water level, and flow rate control solenoid valves to achieve multi-parameter coordinated control, which can accurately match the diversion needs of different rainfall scenarios and effectively prevent urban flooding.

[0041] This invention calculates a weighted comprehensive pollution index based on local pollution characteristics, enabling accurate water quality assessment. Rainwater that does not meet standards can be recycled for secondary purification, thus overcoming the shortcomings of existing technologies that lack a dynamic recycling purification mechanism and cannot guarantee the quality of recycled water.

[0042] The device of this invention prevents soil particle blockage through a permeable geotextile layer, optimizes infiltration and storage through a permeable filling layer, and dynamically adjusts the infiltration rate with a seepage control valve. At the same time, the system can predict pipe blockage and adjust valve strategy through water level signals, which solves the problems of easy clogging of filter components and lack of protection and early warning mechanism in existing technologies, and extends the service life of the system.

[0043] This invention enables real-time sensor data acquisition, dynamic control logic calculation, and cloud data upload through sub-devices, supporting remote monitoring and intelligent optimization scheduling. It improves the automation and precision of the sponge city rainwater management system and promotes the quality and efficiency of rainwater resource utilization.

[0044] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the preferred embodiments of this application are described in detail below with reference to the accompanying drawings.

[0045] The above and other objects, advantages and features of this application will become more apparent to those skilled in the art from the following detailed description of specific embodiments in conjunction with the accompanying drawings. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0047] Based on the description of the figures and their corresponding technical content in the document, the titles of the figures are as follows:

[0048] Figure 1 A general flow chart of rainwater pipe infiltration drainage methods applicable to sponge cities;

[0049] Figure 2 A general architecture diagram of a rainwater pipe infiltration drainage system suitable for sponge cities;

[0050] Figure 3 This is a photograph of a rainwater infiltration drainage device suitable for sponge cities.

[0051] Figure 4 An experimental architecture diagram for using the present invention in the application scenario of a stormwater pipe network renovation project around a park or green space;

[0052] Figure 5 This is a comparison chart of water accumulation and blockage data between the present invention and previous methods during a 6-month experimental period;

[0053] Figure 6 This is a comparison chart of the amount of rainwater recovered to meet the standards by the present invention and previous methods during a 6-month experimental period.

[0054] Figure 7 This is a comparison chart showing the compliance rate of rainwater recycling of the present invention with that of previous methods in a 6-month experiment;

[0055] Figure 8 This is a comparison chart of the overall performance of the present invention with previous methods in a 6-month experimental period. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. In the following description, specific details such as specific configurations and components are provided merely to help fully understand the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. In addition, for clarity and brevity, descriptions of known functions and structures are omitted in the embodiments.

[0057] It should be understood that the phrase "an embodiment" or "this embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "an embodiment" or "this embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0058] Furthermore, reference numerals and / or letters may be repeated in different examples within this application. Such repetition is for the purpose of simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed.

[0059] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another type of relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0060] In this article, the term "at least one" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, "at least one of A and B" can mean: A exists alone, A and B exist simultaneously, or B exists alone.

[0061] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion.

[0062] Example 1 mainly describes a rainwater pipe infiltration drainage method suitable for sponge cities, such as... Figure 1 As shown, it specifically includes:

[0063] With a double-layered rainwater pipe structure, at the beginning of rainfall, the solenoid valve at the inlet of the inner pipe is opened, allowing rainwater to enter the inner pipe.

[0064] When the rainfall exceeds the drainage capacity of the inner pipe, the solenoid valve at the inlet of the outer pipe is opened, and the rainwater enters the outer pipe. The rainwater is filtered and purified through the pores on the outer pipe, and the excess rainwater is infiltrated into the surrounding soil.

[0065] A rainwater recycling device is installed at the end of the double-layer rainwater pipe to test the quality of the rainwater after infiltration and purification, and collect the rainwater after it meets the standards.

[0066] Substandard rainwater is controlled to flow back into the outer pipe for further infiltration and purification, thus achieving precise recycling of rainwater resources.

[0067] Furthermore, the opening of the solenoid valve is automatically controlled by the drainage control module based on feedback signals from real-time rainfall intensity, pipeline water level sensors, and flow meters, achieving intelligent response to rainwater diversion. Specifically:

[0068] If the flow rate suddenly increases, determine whether to activate emergency diversion based on the water level. Set a preset rainfall intensity threshold and collect rainfall intensity data in real time. When the rainfall intensity exceeds the initial rainfall intensity threshold, open the initial rainwater interception valve in advance to divert the heavily polluted initial rainwater into the storage tank or treatment facility. When the rainfall intensity remains low, close the interception valve to allow the rainwater to be discharged directly, avoiding frequent system operation.

[0069] Furthermore, the double-layer rainwater pipe structure and initial rainwater treatment are as follows: The rainwater pipe has a double-layer structure, including an inner pipe and an outer pipe. The outer pipe is fitted around the outer periphery of the inner pipe and has regularly distributed seepage pores on its pipe wall. At the beginning of rainfall, the system controls the opening of the first solenoid valve at the inlet of the inner pipe, so that the initial rainwater preferentially enters the inner pipe. Since the initial rainwater usually carries more surface pollutants, the rainwater at this stage can be guided to a storage tank or a dedicated treatment facility to avoid direct discharge into natural water bodies or soil.

[0070] Furthermore, the diversion and infiltration purification of excess rainwater specifically involves the following steps: When rainfall continues and the amount of rainfall exceeds the drainage capacity of the inner pipe, the drainage control module automatically opens the second solenoid valve at the inlet of the outer pipe, allowing subsequent rainwater to enter the outer pipe. The outer pipe is made of porous permeable material. As rainwater flows through the outer pipe, it seeps out through the pores in the pipe wall and undergoes physical filtration and preliminary purification through the permeable geotextile wrapped around it and the surrounding gravel / stone filling layer. At the same time, the seeping rainwater further infiltrates into the surrounding soil, achieving on-site absorption and groundwater replenishment, effectively alleviating surface runoff pressure.

[0071] If the flow rate is stable but the water level is high, it indicates that the pipeline may be blocked. Based on the water level adjustment valve strategy, a high water level threshold and a safe water level threshold are preset in the pipeline. When the water level in the pipeline is greater than the high water level threshold, the diversion valve or overflow valve is opened to prevent flooding; when the water level is less than the safe water level threshold, the overflow valve is closed to restore the normal diversion path.

[0072] Furthermore, the rainwater recycling device specifically comprises a primary filtration unit, an infiltration purification unit, an online water quality monitoring unit, an automatic diversion unit, and a water storage tank;

[0073] The primary filtration unit is used to divert rainwater containing high levels of pollutants in the early stages of the diversion process; the infiltration purification unit is used to remove pollutants from the rainwater; the online water quality monitoring unit is used to monitor key indicators of the rainwater after infiltration filtration; and the automatic diversion unit is used to automatically switch the flow direction based on the comprehensive water quality monitoring results.

[0074] Furthermore, the key indicators for monitoring rainwater after infiltration and filtration are specifically as follows:

[0075] The suspended solids (SS) index of the infiltrated water was monitored by a turbidity meter, the COD index of the infiltrated water was monitored by a chemical oxygen demand (COD) meter, the electrical conductivity (EC) index of the infiltrated water was monitored by a conductivity sensor, and the oil content (OIL) index of the infiltrated water was monitored by a fluorescence method.

[0076] The comprehensive pollution index is determined by weighting the types of pollution in the local area according to their severity, and combining them with the benchmark pollution index.

[0077] Furthermore, the automatic switching of flow direction based on water quality monitoring results specifically refers to:

[0078] Preset thresholds for suspended solids, COD, conductivity, oil, and comprehensive pollution index;

[0079] If any key indicator exceeds the corresponding preset threshold, it is determined to be polluted rainwater. The polluted rainwater is then transported back to the upstream section of the outer pipe through a return pump, allowing it to undergo secondary infiltration and purification through the pores of the outer pipe and the surrounding soil until the water quality meets the standards.

[0080] Furthermore, the intelligent control strategy and emergency response mechanism for the drainage process are as follows: the entire drainage process is uniformly scheduled by the drainage control module. This system receives real-time data from rainfall intensity sensors, pipeline water level sensors, flow meters, and water quality monitoring units, and executes the following intelligent control logic:

[0081] Rainfall intensity response: When the real-time rainfall intensity exceeds the preset initial rainfall intensity threshold, the control module opens the initial rainwater interception valve in advance to guide the highly polluted rainwater into the storage tank; if the rainfall intensity remains below the threshold, the interception valve is closed, allowing clean rainwater to be directly discharged or enter the infiltration system, thus avoiding frequent valve operation.

[0082] Pipeline blockage warning and overflow control: When the flow rate is stable but the pipeline water level rises abnormally, the system judges that there may be a risk of blockage and automatically opens the diversion valve or overflow valve to direct some rainwater to the emergency discharge channel to prevent flooding; when the water level drops below the "safe water level threshold", the system closes the overflow valve and restores the normal diversion path;

[0083] Dynamic optimization and remote management: All operational data is uploaded to the cloud management platform in real time, supporting remote monitoring, fault diagnosis, and intelligent optimization of control strategies by maintenance personnel.

[0084] This embodiment details a rainwater infiltration drainage method suitable for sponge cities. Using a double-layered rainwater pipe structure, solenoid valves are intelligently controlled based on rainfall intensity and water level signals. Through multi-parameter coordinated control, the inner solenoid valve opens at the initial stage of rainfall, allowing rainwater to enter the inner pipe. When the rainfall exceeds the drainage capacity of the inner layer, the outer solenoid valve opens, allowing rainwater to enter the porous outer pipe for filtration, purification, and infiltration into the soil. A rainwater recycling device is installed at the end of the pipe. Rainwater that meets quality standards is collected, while polluted rainwater that does not meet standards flows back into the outer pipe for further purification, achieving precise rainwater recycling.

[0085] Example 2, based on Example 1, describes in detail a rainwater pipe infiltration drainage system suitable for sponge cities, such as... Figure 2The system architecture diagram shown includes a two-layer rainwater pipe system, an electromagnetic control valve, a rainwater harvesting and utilization device, and a rainwater pipe infiltration drainage control module, specifically:

[0086] A double-layered rainwater pipe includes an inner pipe and an outer pipe that is fitted around its perimeter.

[0087] The electromagnetic control valve includes a first electromagnetic valve installed at the inlet of the inner layer of the double-layer rainwater pipe, and a second electromagnetic valve installed at the inlet of the outer layer of the double-layer rainwater pipe.

[0088] The rainwater harvesting and recycling device is installed at the end of the double-layer rainwater pipe. It is used to test the water quality of the rainwater after it has been purified by infiltration through the outer layer of the pipe, and to collect or recycle the rainwater according to the test results.

[0089] The rainwater pipe infiltration drainage control module is connected to an electromagnetic control valve and a rainwater recycling device, and is used to control the electromagnetic control valve and the rainwater recycling device to achieve precise recycling of rainwater resources.

[0090] Furthermore, the precise recycling of rainwater resources is specifically achieved as follows: the rainwater pipe infiltration drainage control module controls the opening of the first solenoid valve at the beginning of rainfall, allowing rainwater to enter the inner pipe; when the rainfall exceeds the drainage capacity of the inner pipe, it controls the opening of the second solenoid valve, allowing rainwater to enter the outer pipe, where it is filtered and purified through pores before infiltrating into the surrounding soil; simultaneously, based on the water quality information fed back by the rainwater recycling device, it controls the return of substandard rainwater to the upstream section of the outer pipe for further infiltration and purification.

[0091] Furthermore, the double-layered rainwater pipe serves as the system's rainwater transport and infiltration carrier, and is the core hardware for achieving stratified flow distribution. It adopts an inner and outer nested design. The inner pipe is a conventional impermeable pipe, made of high-strength PVC or reinforced concrete, mainly used for rapid rainwater transport during the initial stage of rainfall and low-intensity rainfall, preventing initial contaminated rainwater from infiltrating and polluting the soil. The outer pipe is fitted around the inner pipe with a reasonable gap between them. The pipe body is made of porous permeable material with evenly distributed permeable holes on the wall. The outer perimeter is wrapped with a permeable geotextile layer and a permeable filling layer. The permeable geotextile layer can effectively prevent soil particles from entering the pipe and causing pore blockage. The permeable filling layer is composed of crushed stone or gravel with a reasonable particle size distribution, which can enhance the lateral infiltration capacity of rainwater and achieve temporary rainwater storage, relieving drainage pressure.

[0092] Furthermore, the electromagnetic control valve is the system's diversion execution component, comprising two independent components: a first electromagnetic valve and a second electromagnetic valve, which respectively control the opening and closing of the inner and outer pipelines. The first electromagnetic valve is installed at the inlet of the inner pipeline, and the second electromagnetic valve is installed at the inlet of the outer pipeline. Both are designed to be waterproof and moisture-proof, suitable for the humid working environment of underground pipelines. The electromagnetic valve is connected to the rainwater pipeline infiltration drainage control module via wired or wireless signals, and can receive switching commands issued by the module with a response time of ≤0.5 seconds, ensuring timely diversion switching. It also has a status feedback function, which can transmit the actual opening and closing status of the valve back to the control module to ensure the accuracy of regulation.

[0093] Furthermore, the rainwater harvesting and utilization device is a key component for realizing rainwater purification, detection, recycling, and reuse. It integrates a primary filtration unit, an infiltration purification unit, an online water quality monitoring unit, an automatic diversion unit, and a storage tank. The primary filtration unit is used to divert highly polluted rainwater from the initial stage, removing large particulate impurities. The infiltration purification unit connects to the outer pipeline infiltration path to further adsorb and remove suspended pollutants from the rainwater. The online water quality monitoring unit is equipped with a turbidity meter, a chemical oxygen demand (COD) meter, a conductivity sensor, and a fluorescence-based oil detector, enabling real-time monitoring of four core water quality indicators: SS, COD, EC, and OIL. The automatic diversion unit uses a three-way valve structure, with the flow direction controlled by the control module to allow compliant rainwater to enter the storage tank and non-compliant rainwater to be returned for purification. The storage tank is equipped with a level sensor to provide real-time feedback on the storage capacity and prevent overflow.

[0094] Furthermore, the rainwater pipe infiltration drainage control module, as the core of the system, includes a data acquisition unit, a logic operation unit, and an instruction output unit. The data acquisition unit can receive real-time data from rainfall intensity sensors, pipe water level sensors, flow meters, and online water quality monitoring units. The logic operation unit has a built-in preset threshold model and control strategy, which can make comprehensive judgments based on the collected multi-parameter data and generate corresponding control instructions. The instruction output unit sends control instructions to actuators such as electromagnetic control valves, automatic diversion units, and return pumps, and also has a data upload function.

[0095] This embodiment describes in detail a rainwater pipe infiltration drainage system suitable for sponge cities. The system includes a double-layer rainwater pipe, an electromagnetic control valve, a rainwater recycling device, and a rainwater pipe infiltration drainage control module. The control module connects the various components to achieve precise rainwater recycling.

[0096] Example 3, based on Example 1, describes a rainwater pipe infiltration drainage device suitable for sponge cities, such as... Figure 3 The illustrated double-layer drainage pipe system includes a permeable pipe body, a permeable geotextile layer, a permeable filling layer, a rainwater collection inlet, and a seepage control valve. Specifically:

[0097] The permeable pipe body is made of porous permeable material, and the pipe wall has regularly distributed seepage holes;

[0098] The permeable geotextile layer is wrapped around the periphery of the permeable pipe body to prevent soil particles from entering the pipe and causing blockage.

[0099] The permeable filling layer is disposed around the permeable pipe body and is composed of crushed stone or gravel with a reasonable particle size distribution, which is used to enhance the lateral infiltration and temporary storage capacity of rainwater.

[0100] The rainwater collection inlet is connected to the permeable pipe body and is used to connect to the rainwater pipe network;

[0101] The seepage control valve is installed on the side wall of the permeable pipe body and is used to dynamically adjust the seepage rate according to the soil moisture content or groundwater level to prevent groundwater backflow.

[0102] Furthermore, the permeable pipe body, as the core skeleton of the device, undertakes the functions of rainwater transportation and initial infiltration. It is integrally molded with high-strength porous permeable material, and the material can be permeable concrete, porous ceramic or high-strength permeable plastic to ensure sufficient structural strength to resist underground soil pressure.

[0103] Furthermore, the permeable pipe body achieves water permeability by opening regularly distributed seepage holes on the pipe wall. The seepage holes have a diameter of 5-10mm and a spacing of 50-80mm, arranged in a quincunx pattern, which ensures water permeability efficiency while avoiding excessively dense hole positions that would reduce structural strength.

[0104] Furthermore, the permeable geotextile layer is made of polyester filament needle-punched nonwoven geotextile. Its core function is to prevent soil particles, silt and other impurities from entering the pores or seepage holes of the pipe body, thus preventing pipe blockage and failure of the seepage function. At the same time, it has good permeability and does not affect the rainwater infiltration efficiency. Its equivalent pore size range is 0.075-0.2mm, and its permeability coefficient is ≥0.01cm / s, which can adapt to the use needs of different types of soil.

[0105] Furthermore, a permeable filling layer is set around the permeable geotextile layer, with a filling range of 30-50cm around the outer perimeter of the pipe body. The material is selected as crushed stone or gravel with a reasonable particle size distribution, with a particle size range of 20-40mm, to ensure that continuous pore channels are formed inside the filling layer. Its core function is to enhance the lateral infiltration capacity of rainwater, accelerate the infiltration rate of rainwater into the surrounding soil, and prevent rainwater from accumulating around the pipe. At the same time, it can realize the temporary regulation and storage of rainwater, storing some rainwater during the peak rainfall period to relieve the drainage pressure of the pipe, and slowly infiltrating into the soil after the rainfall ends to replenish groundwater, thus achieving the synergistic effect of rainwater retention and infiltration.

[0106] Furthermore, the rainwater collection inlet is connected to the permeable pipe body at one end via a three-way structure, and the other end is connected to the municipal rainwater pipe network or surface runoff collection inlet. A grid filter assembly is installed at the inlet, with a grid aperture of 10-20mm, to intercept large debris such as leaves, branches, and plastic bags, preventing them from entering the pipe body and causing blockage.

[0107] Furthermore, the seepage control valve adopts an electromagnetically controlled ball valve structure and is connected to the control module of the infiltration drainage system. It can receive opening adjustment commands from the control module. Its core function is to dynamically adjust the rainwater seepage rate. When the soil moisture content is too high or the groundwater level rises, the control module controls the seepage control valve to reduce the opening or close it based on feedback data from the soil moisture sensor or groundwater level sensor to prevent groundwater from backflowing into the pipe body. When the soil moisture content is low, the valve is adjusted to increase the opening to improve the rainwater infiltration efficiency.

[0108] This embodiment describes in detail the rainwater pipe used to construct a double-layer structure, including a permeable pipe body made of porous permeable material, a permeable geotextile layer wrapping the pipe body, a permeable filling layer around the pipe, a rainwater collection inlet connected to the pipe body, and a seepage control valve for adjusting the seepage rate.

[0109] Example 4, based on Example 1, describes in detail an electronic device, which includes a processor, a memory, and a computer program stored in the memory and executable on the processor, specifically:

[0110] The processor receives real-time data from a rainfall intensity sensor, a pipeline water level sensor, a flow meter, and an online water quality monitoring unit;

[0111] Based on the preset control logic and threshold model, the opening and closing status of the solenoid valves at the inlet of the inner and outer pipes is dynamically adjusted to achieve coordinated control of rainwater diversion, infiltration purification and emergency overflow.

[0112] Based on the water quality monitoring results, it is determined whether the rainwater meets the standards. If it does not meet the standards, a backflow command is generated to control the backflow pump to transport the rainwater to the upstream section of the outer pipe for secondary infiltration and purification.

[0113] Meanwhile, the system's operating status, water quality data, and control logs are uploaded to the cloud management platform, supporting remote monitoring and intelligent optimization scheduling.

[0114] Furthermore, the control program architecture for the opening and closing states of the solenoid valves at the inlets of the inner and outer pipes is as follows:

[0115] if(rain_intensity>R1) and (water_level>L1):

[0116] open_valve("initial_rain_valve")

[0117] elif(flow_rate>Q_max) or (water_level>L2):

[0118] open_valve("overflow_valve")

[0119] else:

[0120] close_valve("initial_rain_valve")

[0121] close_valve("overflow_valve")

[0122] The above code architecture is implemented using Python.

[0123] This embodiment describes in detail an electronic device including a processor, memory and related computer programs. When the program runs, it can receive real-time data such as rainfall intensity, water level, flow rate and water quality, and dynamically adjust the opening and closing of solenoid valves to achieve coordinated control such as diversion and infiltration purification; determine whether the rainwater meets the standards, and generate a return flow command if it does not; at the same time, it uploads data such as system operating status to the cloud to support remote monitoring and intelligent optimization scheduling.

[0124] Example 5 details an experiment using a stormwater drainage network renovation project around a park as an application scenario. The experiment utilizes the infiltration drainage method, system, device, and electronic equipment of this invention to achieve intelligent rainwater diversion, infiltration purification, and precise reuse. The area has an average annual rainfall of 1200mm, with the rainy season concentrated from June to September, experiencing localized flooding due to short-term heavy rainfall. Simultaneously, it is necessary to recycle rainwater resources for park greening irrigation. The specific experimental process is as follows:

[0125] The initial design rainfall intensity threshold is 5 mm / h, the inner pipe drainage capacity threshold is 80 m³ / h, the high water level threshold is 70% of the pipe diameter, the safe water level threshold is 30% of the pipe diameter, the soil type is silty loam, and the permeability coefficient is 5× The water flow rate is cm / s, the groundwater level is 2.5m deep, and the water requirement for greening irrigation is 50m³ / d.

[0126] like Figure 4 The experimental setup shown depicts a permeable drainage device using a 600mm inner diameter permeable concrete pipe as the main body. The pipe wall has 8mm diameter seepage holes spaced 60mm apart in a quincunx pattern. The permeable geotextile layer is made of polyester filament needle-punched nonwoven geotextile with an equivalent pore size of 0.1mm and a permeability coefficient of [missing information]. The entire pipe body is wrapped with a 15cm overlap and hot-melt welded; the permeable filling layer uses crushed stone with a particle size of 25-35mm and a uniformity coefficient. =6, curvature coefficient =2.2, the filling range is 40cm around the outer circumference of the pipe; the rainwater collection inlet adopts a three-way structure, the diameter of which matches the pipe body, the inlet grille has a diameter of 15mm, and is equipped with a 30°-150° angle adjustment structure; the seepage control valve is a DN100 electromagnetic control ball valve with a sealing performance level of IP68, a response time of 0.3 seconds, and is wirelessly connected to the control module.

[0127] The inner layer of the double-layer rainwater pipe is made of reinforced concrete impermeable pipe with an inner diameter of 600mm and a material strength grade of C30. It is used for rapid rainwater transportation during initial and low-intensity rainfall. It is coaxially nested with the outer permeable pipe, with a distance of 15cm between the two.

[0128] Both the first and second solenoid valves are DN600 waterproof and moisture-proof solenoid valves with a working pressure of 0.6MPa and a response time of 0.4 seconds. They are wired to the rainwater pipe seepage drainage control module.

[0129] The primary filtration unit of the rainwater harvesting and utilization device uses a stainless steel filter screen with a pore size of 5mm to divert highly polluted rainwater in the initial 20 minutes; the infiltration purification unit adopts a composite structure of activated carbon adsorption layer + quartz sand filter layer; the automatic diversion unit uses a DN300 three-way solenoid valve.

[0130] Taking a typical rainfall event as an example, at the beginning of the rainfall, the rainfall intensity sensor collected a real-time rainfall intensity of 3 mm / h, which is less than the preset gas storage threshold. The electronic equipment determined it to be low-intensity rainfall and issued a command to open the first solenoid valve and close the second solenoid valve. Surface runoff and rainwater from the municipal pipe network entered the inner pipe through the inner pipe inlet and were quickly transported downstream. In the first 20 minutes, the highly polluted rainwater was diverted to the regulating tank for treatment through the primary filtration unit to avoid soil pollution.

[0131] One hour after the rainfall began, the rainfall intensified. The rainfall intensity sensor reported a flow rate of 15 mm / h, exceeding the initial threshold. The flow meter reported a flow rate of 95 m³ / h, exceeding the inner layer drainage capacity threshold. The pipe level sensor detected a water level of 0.49 m, reaching the high water level threshold. The electronic equipment issued commands to close the first solenoid valve and open the second solenoid valve. Excess rainwater entered the outer permeable pipe body through the rainwater collection inlet. After being intercepted by the inlet grille for large debris such as leaves, it seeped outward through the seepage holes in the pipe wall. The permeable geotextile layer prevented soil particles from entering, and the rainwater further infiltrated into the gravel filling layer, achieving lateral diffusion and temporary storage. At the same time, the filling layer adsorbed some suspended impurities, and finally slowly infiltrated into the surrounding soil to replenish groundwater. At this time, the monitored soil moisture content was 65%, which was unsaturated. The electronic equipment controlled the seepage control valve to fully open, improving the infiltration efficiency.

[0132] Rainwater, purified through the outer pipe, flows to the end-of-pipe rainwater recycling device. It first passes through a primary filtration unit to remove residual large particles, and then undergoes further purification through an activated carbon + quartz sand composite infiltration purification unit. Simultaneously, an online water quality monitoring unit detects: SS at 8 mg / L, COD at 35 mg / L, EC at 320 μS / cm, and OIL at 1.2 mg / L. Based on local pollution characteristics, weights are assigned to SS, COD, EC, and OIL as 0.3, 0.4, 0.1, and 0.2 respectively, calculating a comprehensive pollution index of 0.25. Since all indicators are below the preset thresholds, the rainwater is deemed compliant. Electronic equipment controls the automatic diversion unit to switch to the storage tank direction, allowing the compliant rainwater to enter and be stored.

[0133] Taking a short-term heavy rainfall during the rainy season as an example, the rainfall intensity suddenly increased to 30 mm / h, and the flow meter reported a sudden increase in flow rate exceeding 150 m³ / h. The electronic equipment, combined with the water level data, determined to initiate emergency diversion, immediately opening the initial rainwater interception valve to divert the highly polluted rainwater into the storage tank; at the same time, the overflow valve was opened to release pressure and prevent flooding; in the later stage of the rainfall, the rainfall intensity dropped back to 4 mm / h, the flow rate stabilized at 60 m³ / h, and the water level dropped back to 0.21m. The electronic equipment closed the overflow valve and the interception valve, opened the first solenoid valve, and restored the normal diversion path of the inner pipeline.

[0134] Following the rainfall, the online water quality monitoring unit detected a COD level of 85 mg / L and a comprehensive pollution index of 0.6, both exceeding the threshold, classifying the rainwater as substandard. The electronic equipment generated a return flow command, controlling the return pump to transport the substandard rainwater back to the upstream section of the outer pipeline, where it underwent secondary infiltration and purification through the pores of the outer pipeline, the permeable geotextile layer, and the gravel filling layer. One hour later, a second test showed that the COD level had dropped to 42 mg / L and the comprehensive pollution index to 0.28, meeting the standards. After that, the water was switched to the storage tank for collection.

[0135] During the cumulative 6-month experimental period, the waterlogging prevention effect of this invention was observed to be significant. No localized waterlogging occurred in the area during the rainy season, and the drainage pressure of the pipeline was reduced by 60% compared with before the renovation. The efficiency of rainwater reuse was improved, with more than 3200m³ of qualified rainwater collected, meeting 60% of the greening irrigation needs of the park and saving 30% of tap water consumption. The water quality was reliable, with all indicators of reused rainwater meeting the water quality requirements for green space irrigation. Only one pipeline blockage occurred during the 6 months of operation, the seepage rate remained stable, the electronic equipment data was uploaded in a timely manner, the remote control response was accurate, and the system stability was good.

[0136] The drainage data of the SIP-RS integrated infiltration and drainage system and the DLD-RS double-layer rainwater drainage ditch structure previously used in this green space were compared with the present invention over the same time period, and the comparison data is shown in the table below:

[0137] Drainage data indicators SIP-RS Integrated Infiltration and Drainage System Double-layer rainwater drainage ditch structure DLD-RS This invention Number of flooding incidents / 6 months 4 times 6 times 2 times Number of blockages / 6 months 4 times 2 times 1 time Maintenance cost for 6 months (RMB) >3200 >2800 >1500 Operating energy consumption (kWh / 6 months) 850 620 980 Rainwater collected in 6 months meets standards 935m³ 821m³ 1676m³ Initial rainwater interception efficiency 67.5% 70.3% 88% Reduced drainage pressure in stormwater pipes 31.2% 26.8% 43.3% Rainwater reuse water quality compliance rate 85.2% 77.8% 93.7% Water resource utilization rate 22.0% 19.3% 39.4% Diversion and control response time (s) 1.2 0.8 0.4

[0138] According to the table above and Figure 5 The comparison chart of water accumulation and blockage frequency for the three methods shows that, during the 6-month test, the present invention only experienced 2 instances of water accumulation and 1 instance of blockage. The number of failures was less than half that of the previous methods. Therefore, the 6-month maintenance cost was only 1500 yuan, which is significantly lower than the comparative methods, making it more cost-effective in the long term. Based on the table above... Figure 6

[0139] According to the table above and Figure 6 , Figure 7 The comparison of the performance of the three methods for collecting rainwater that meets the standards shows that the present invention is significantly better than the two methods used in the past in terms of water resource utilization and has higher environmental benefits.

[0140] According to the table above and Figure 8 As shown in the comprehensive performance comparison chart of the three methods, the present invention outperforms the two previously used methods in terms of initial rainwater interception efficiency, reduction of stormwater drainage pressure, compliance rate of reused rainwater quality, and water resource utilization rate, and has better overall performance.

[0141] This embodiment describes in detail the experiment conducted on the rainwater pipe network renovation project around the park green space using the proposed method. The experimental results fully demonstrate the significant advantages of the proposed method in terms of ecological benefits, economic benefits, and technical precision through its dual-layer intelligent diversion, multi-parameter collaborative control, closed-loop water quality management, and anti-clogging design.

[0142] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any changes, modifications, substitutions, integrations, and parameter changes made to these embodiments within the spirit and principles of the present invention, without departing from the principles and spirit of the present invention, through conventional substitutions or to achieve the same function, fall within the scope of protection of the present invention.

Claims

1. A method for rainwater pipe infiltration drainage suitable for sponge cities, characterized in that, include: With a double-layered rainwater pipe structure, at the beginning of rainfall, the solenoid valve at the inlet of the inner pipe is opened, allowing rainwater to enter the inner pipe. When the rainfall exceeds the drainage capacity of the inner pipe, the solenoid valve at the inlet of the outer pipe is opened, and the rainwater enters the outer pipe. The rainwater is filtered and purified through the pores on the outer pipe, and the excess rainwater is infiltrated into the surrounding soil. A rainwater recycling device is installed at the end of the double-layer rainwater pipe to test the quality of the rainwater after infiltration and purification, and collect the rainwater after it meets the standards. Substandard rainwater is controlled to flow back into the outer pipe for further infiltration and purification, thus achieving precise recycling of rainwater resources.

2. The method according to claim 1, characterized in that, The opening of the solenoid valve is automatically controlled by the drainage control module based on feedback signals from real-time rainfall intensity, pipeline water level sensors, and flow meters, achieving intelligent response to rainwater diversion. Specifically: If the flow rate suddenly increases, determine whether to activate emergency diversion based on the water level. Set a preset rainfall intensity threshold and collect rainfall intensity data in real time. When the rainfall intensity exceeds the initial rainfall intensity threshold, open the initial rainwater interception valve in advance to divert the heavily polluted initial rainwater into the storage tank or treatment facility. When the rainfall intensity remains low, close the interception valve to allow the rainwater to be discharged directly, avoiding frequent system operation. If the flow rate is stable but the water level is high, it indicates that the pipeline may be blocked. Based on the water level adjustment valve strategy, a high water level threshold and a safe water level threshold are preset in the pipeline. When the water level in the pipeline is greater than the high water level threshold, the diversion valve or overflow valve is opened to prevent flooding; when the water level is less than the safe water level threshold, the overflow valve is closed to restore the normal diversion path.

3. The method according to claim 1, characterized in that, The rainwater harvesting and utilization device specifically includes a primary filtration unit, an infiltration purification unit, an online water quality monitoring unit, an automatic diversion unit, and a water storage tank. The primary filtration unit is used to divert rainwater containing high levels of pollutants in the early stages of the diversion process; the infiltration purification unit is used to remove pollutants from the rainwater; the online water quality monitoring unit is used to monitor key indicators of the rainwater after infiltration filtration; and the automatic diversion unit is used to automatically switch the flow direction based on the comprehensive water quality monitoring results.

4. The method according to claim 3, characterized in that, The key indicators for monitoring rainwater after infiltration and filtration are as follows: The suspended solids (SS) index of the infiltrated water was monitored by a turbidity meter, the COD index of the infiltrated water was monitored by a chemical oxygen demand (COD) meter, the electrical conductivity (EC) index of the infiltrated water was monitored by a conductivity sensor, and the oil content (OIL) index of the infiltrated water was monitored by a fluorescence method. The comprehensive pollution index is determined by weighting the types of pollution in the local area according to their severity, and combining them with the benchmark pollution index.

5. The method according to claim 3, characterized in that, The automatic switching of flow direction based on water quality monitoring results is specifically as follows: Preset thresholds for suspended solids, COD, conductivity, oil, and comprehensive pollution index; If any key indicator exceeds the corresponding preset threshold, it is determined to be polluted rainwater. The polluted rainwater is then transported back to the upstream section of the outer pipe through a return pump, allowing it to undergo secondary infiltration and purification through the pores of the outer pipe and the surrounding soil until the water quality meets the standards.

6. A rainwater infiltration drainage system suitable for sponge cities, used to implement any of the methods described in claims 1-5, characterized in that, It includes a double-layered rainwater pipe structure, an electromagnetic control valve, a rainwater harvesting and reuse device, and a rainwater pipe infiltration drainage control module, specifically: A double-layered rainwater pipe includes an inner pipe and an outer pipe that is fitted around its perimeter. The electromagnetic control valve includes a first electromagnetic valve installed at the inlet of the inner layer of the double-layer rainwater pipe, and a second electromagnetic valve installed at the inlet of the outer layer of the double-layer rainwater pipe. The rainwater harvesting and recycling device is installed at the end of the double-layer rainwater pipe. It is used to test the water quality of the rainwater after it has been purified by infiltration through the outer layer of the pipe, and to collect or recycle the rainwater according to the test results. The rainwater pipe infiltration drainage control module is connected to an electromagnetic control valve and a rainwater recycling device, and is used to control the electromagnetic control valve and the rainwater recycling device to achieve precise recycling of rainwater resources.

7. A rainwater infiltration drainage system suitable for sponge cities, characterized in that, The precise recycling of rainwater resources is achieved as follows: the rainwater pipe infiltration drainage control module controls the opening of the first solenoid valve at the beginning of rainfall, allowing rainwater to enter the inner pipe; when the rainfall exceeds the drainage capacity of the inner pipe, it controls the opening of the second solenoid valve, allowing rainwater to enter the outer pipe, where it is filtered and purified through pores before infiltrating into the surrounding soil; at the same time, based on the water quality information fed back by the rainwater recycling device, it controls the return of substandard rainwater to the upstream section of the outer pipe for further infiltration and purification.

8. A rainwater pipe infiltration drainage device suitable for sponge cities, used to construct the double-layer structure of the rainwater pipe, characterized in that, It includes the permeable pipe body, permeable geotextile layer, permeable filling layer, rainwater collection inlet, and seepage control valve, specifically: The permeable pipe body is made of porous permeable material, and the pipe wall has regularly distributed seepage holes; The permeable geotextile layer is wrapped around the periphery of the permeable pipe body to prevent soil particles from entering the pipe and causing blockage. The permeable filling layer is disposed around the permeable pipe body and is composed of crushed stone or gravel with a reasonable particle size distribution, which is used to enhance the lateral infiltration and temporary storage capacity of rainwater. The rainwater collection inlet is connected to the permeable pipe body and is used to connect to the rainwater pipe network; The seepage control valve is installed on the side wall of the permeable pipe body and is used to dynamically adjust the seepage rate according to the soil moisture content or groundwater level to prevent groundwater backflow.

9. An electronic device, characterized in that, The system includes a processor, a memory, and a computer program stored in the memory and executable on the processor. When executed by the processor, the computer program implements the steps of the rainwater pipe infiltration drainage method for sponge cities as described in any one of claims 1 to 5, specifically: The processor receives real-time data from a rainfall intensity sensor, a pipeline water level sensor, a flow meter, and an online water quality monitoring unit; Based on the preset control logic and threshold model, the opening and closing status of the solenoid valves at the inlet of the inner and outer pipes is dynamically adjusted to achieve coordinated control of rainwater diversion, infiltration purification and emergency overflow. Based on the water quality monitoring results, it is determined whether the rainwater meets the standards. If it does not meet the standards, a backflow command is generated to control the backflow pump to transport the rainwater to the upstream section of the outer pipe for secondary infiltration and purification. Meanwhile, the system's operating status, water quality data, and control logs are uploaded to the cloud management platform, supporting remote monitoring and intelligent optimization scheduling.

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