A method for online monitoring and leakage management of a building water supply system pipe network

Abstract

The application relates to a kind of building water supply system pipe network online monitoring and leakage management methods, belong to building water supply comprehensive operation and maintenance system technical field.This method mainly includes (1) building water supply system pipe network design, (2) remote transmission equipment, (3) cloud storage server and (4) information monitoring platform four parts;Remote transmission equipment is installed in building water supply system pipe network;Information monitoring platform is electrically connected or signal connected with remote transmission equipment, and information monitoring platform is used for remote monitoring of remote transmission equipment data, early warning alarm and remote control of pipe network leakage and other functions;Cloud storage server is electrically connected or signal connected with information monitoring platform, and is used for analyzing leakage condition.

Description

Technical Field

[0001] This invention relates to a method for online monitoring and leakage management of building water supply system networks, involving related fields such as Internet of Things technology, big data analysis, cloud storage technology, online monitoring and remote control technology, and belongs to the technical field of integrated operation and maintenance systems for building water supply. Background Technology

[0002] To meet development needs, the national urban public water supply network leakage rate should be controlled below 9%. Real-time monitoring of water supply facility operation status and information such as water volume, pressure, and quality will be implemented to accurately identify leakage points and intelligently adjust network pressure in different areas, gradually improving the informatization and intelligent management level of urban water supply network leakage. Currently, the leakage rate in the domestic water supply industry is generally between 12% and 18%. In 2021, the national water supply network leakage rate was approximately 12.68%, and most cities have reached a point where further improvement is not possible. Research indicates that 80% of urban water supply network leakage occurs within buildings and residential communities. Therefore, only by effectively controlling leakage within buildings and residential communities can the goal of controlling the national urban public water supply network leakage rate below 9% be achieved. Although the "Green Building Evaluation Standard" (GB / T5038-2019) clearly stipulates requirements for the graded metering of building water supply networks, in practice, remote water meters are often scattered and difficult to maintain. Instrument malfunctions cannot be addressed promptly, data processing logic is chaotic, and operational monitoring data cannot be effectively utilized, creating data silos. Ultimately, this renders water-saving metering ineffective, and network leakage remains uncontrolled. Therefore, more advanced technologies are needed to optimize the operation and leakage management of building water supply systems.

[0003] Traditional district meter area (DMA) zoning is generally used for the zoned management of municipal water supply networks. It primarily divides the municipal water supply network system into several smaller, permanently bounded subsystems (zones). Each zone is equipped with flow meters or water meters to measure the inflow and outflow of water, enabling the independent calculation of water supply, outflow (i.e., water consumption), and leakage rate for each zone. The criteria for establishing DMA zoning in municipal water supply networks mainly include the following: ① The size of the DMA zone (primarily based on the area and topography of each region); ② The number of valves that must be closed to isolate the DMA zone; ③ The number of water meters used to calculate the inflow and outflow of water within the DMA zone; ④ The changes in ground elevation and pressure within the DMA; ⑤ Utilizing clear and well-defined topographical features as DMA zone boundaries, such as rivers, drainage ditches, highways, and railways. Figure 1As shown, DMA (Distriction and Discharge) zoning technology has been successfully applied in the zoning management of near-planar municipal water supply networks. However, compared to municipal water supply networks, the zoning theory for building water supply networks has received less attention. Furthermore, with the increasing complexity of water usage functions in public buildings, the emergence of more high-rise and super high-rise buildings, and the occasional addition of additional water usage functions based on the living needs within the building area, the existing pressure zoning in the "Building Water Supply and Drainage Design Standard" GB50015 and the installation of water meters according to different functions and uses in the "Green Building Evaluation Standard" GB / T5038 are no longer sufficient to meet the current needs for operation and maintenance and leakage management of building water supply systems. Therefore, considering the system characteristics and development needs of building vertical pipe networks, this paper proposes a method for online monitoring and leakage management of building water supply systems. Remote management methods are also provided. Summary of the Invention

[0004] This invention provides a method for online monitoring and leakage management of building water supply system networks. The method mainly includes four parts: (1) building water supply system network design, (2) remote transmission equipment, (3) cloud storage server, and (4) information monitoring platform. The remote transmission equipment is installed in the building water supply system network. The information monitoring platform is electrically or signal-connected to the remote transmission equipment. The information monitoring platform is used for remote monitoring of data from the remote transmission equipment, early warning alarms for network leakage, and remote control of valves. The cloud storage server is electrically or signal-connected to the information monitoring platform and is used to analyze leakage.

[0005] (1) The system design includes the DMA partitioning of the building water supply system network.

[0006] The building's water supply network is divided into several DMA (Districted Area Management) zones based on the building's permanent boundaries. The DMA zoning principle considers the isolation between buildings and floors, i.e., the selection of permanent boundaries; including: ① zoning of different buildings; ② zoning of above-ground and underground floors, such as zoning that considers above-ground and underground floors and different water supply pressures; ③ evenly dividing multiple floors into multiple different zones; ④ zoning between horizontal plane spaces, such as zoning of different water use functions within the same floor for floors with large horizontal plane spaces and complex functions; etc.

[0007] The pipe network within each zone adopts a ring layout, and remote water meters that measure the flow rate entering the area are installed before and after each zone. These meters can independently calculate the water supply, outflow (i.e., water consumption), and leakage rate of each zone, providing technical conditions for carrying out pipeline leakage management and monitoring.

[0008] The ring-shaped arrangement is as follows: a pipe connects to the ring-shaped pipe as the inlet pipe of the ring-shaped pipe (the inlet pipe is connected to two branches of the ring-shaped pipe at the same time and supplies water simultaneously). Multiple outlets can be set on the ring-shaped pipe to supply water to the next level as needed. Different numbers of outlets can be set or added or removed on the same ring-shaped pipe as needed, which means that different numbers of water supply to the next level can be added or removed. Through the ring-shaped arrangement of the pipe network, a closed pipe network is formed in this area.

[0009] The resulting building water supply system network includes the following: multiple primary branch single pipes are connected to the main building water supply pipe; each primary branch single pipe is connected to multiple secondary branch single pipes and / or ring-shaped pipes; each secondary branch single pipe is connected to multiple tertiary branch single pipes and / or ring-shaped pipes; each tertiary branch single pipe is connected to multiple quaternary branch single pipes and / or ring-shaped pipes, and so on; at the same time, nested primary branch single pipes are connected to the ring-shaped pipes as needed; further nested primary branch single pipes are connected to multiple nested secondary branch single pipes and / or ring-shaped pipes, and so on; and each branch single pipe and each ring-shaped pipe is numbered.

[0010] The building water supply system network is designed with different levels of branch single pipes according to needs; different levels of nested branch pipes can be connected to the ring-shaped pipe network as needed; especially the specific water-using terminals, i.e., the specific water-using appliances of each user, are divided into ring-shaped pipe networks of DMA management zones.

[0011] Valves and other equipment are installed on the building's water supply system pipeline.

[0012] The remote transmission equipment (2) includes smart remote water meters, pressure sensors and remote electric valves, etc., which are installed on the building water supply pipelines of the building water supply system network (especially the inlet pipes before and after the ring arrangement of the DMA management zone) to collect data such as flow and pressure changes, and number the smart remote water meters, pressure sensors and remote electric valves, etc.; used for cloud storage server (3) to analyze the leakage status of the pipeline network. When a large number of water leakage (damage leakage) accidents occur, the occurrence of water leakage accidents can be confirmed by the continuous increase of nighttime flow, short-term flow, and sudden pressure drop, etc. Then, through the remote control linkage mechanism of the information monitoring platform (4), the valves of the corresponding water supply pipeline section can be remotely closed to control the further deterioration of the water leakage accident.

[0013] Cloud storage server (3) is an important component of information technology. It is used to collect working condition data collected by remote transmission equipment and provide data storage support for remote monitoring and data analysis by information monitoring platform.

[0014] The information monitoring platform (4) includes functions such as remote monitoring of operating data, early warning and alarm of pipeline leakage, and remote control of valves; among them, the remote monitoring function of operating data mainly displays the changing trend of pipeline flow and pressure in the form of statistical curves; the early warning and alarm of pipeline leakage mainly identifies pipeline leakage by monitoring pipeline night flow, daytime continuous flow (generally, daytime flow is greater than nighttime flow), and sudden drop in pipeline pressure, and issues early warning and alarm prompts for pipeline leakage in the corresponding area; the remote control of valves mainly refers to the system promptly closing the remote control valves of the corresponding area or pipe section through leakage linkage when pipeline leakage or pipe burst accident occurs, quickly handling water leakage accidents, reducing water waste, and avoiding further occurrence of secondary disaster accidents.

[0015] Methods for monitoring and managing pipeline leaks include the following steps:

[0016] 1) Select a meter capable of dripping water (starting flow rate 0.002m³). 3 The remote water meter ( / h) is installed based on the DMA zoning method, and an online monitoring system for the pipeline network is established. The DMA zoning pipelines connected to the water supply branch pipes of each water appliance are arranged in a ring to form a closed water supply pipeline. That is, all water supply branch pipes connected out of the DMA zoning are within the monitoring range of the remote water meter corresponding to the DMA zoning, and under normal circumstances, the reading of the inlet water meter is equal to the sum of the readings of the water meters of each water supply branch pipe.

[0017] 2) Number the remote water meters, establish a logical diagram association system for water meters with hierarchical relationships within the DMA partition, and associate them level by level. When the data of one of the water meters is abnormal (such as water leakage in the pipeline, pipe burst, or damage to water appliances), the online monitoring system will prompt and alarm the DMA partition associated with the water meter and the associated upper-level water meter, thereby realizing hierarchical alarm and quickly locking the abnormal range.

[0018] 3) Check the flow and pressure changes of each pipeline during the night (2:00-4:00 AM) and daytime (7:00-7:00 PM) periods, and select and establish the change curves under normal operating conditions, i.e., the standard curves;

[0019] 4) Set the alarm threshold for the system through the information monitoring platform; in case of leakage, the nighttime flow rate exceeds x% of the standard value for the corresponding time period (can be set as needed). For example, if the flow rate of a certain pipe section continuously exceeds 0.002m³ during the night... 3 / h situation; When a pipe bursts, if the real-time flow rate for more than 5 minutes within 24 hours is much greater than the sum of the maximum flow rates of all water-using appliances in this pipe section (much greater than the flow rate difference that may occur depending on the different needs of different pipes), and at the same time, there is a sudden drop in the online water supply monitoring pressure for a long period of time (i.e., abnormal flow rate, the duration of which may occur depending on the different needs of different pipes); If the monitored flow rate for more than 10 minutes when a water-using appliance is damaged is equal to the rated outflow rate of the water-using appliance, an alarm will be triggered and the abnormal data information will be transmitted to the next higher level water meter through the preset association system of the logic diagram and a report will be generated.

[0020] 5) The report should include the time, location (floor or specific functional room), DMA zone number, water meter number of the abnormal data, preliminary judgment of the abnormal status (leakage, pipe burst, or damage to sanitary ware valves, etc.), and real-time monitoring of flow and pressure change curves; maintenance personnel should carry out actual repairs based on the report.

[0021] Advantages of this invention:

[0022] For a long time, engineering projects have often encountered problems such as the dispersed installation and maintenance of remote water meters, difficulties in timely maintenance of instrument malfunctions, chaotic data processing logic, and ineffective utilization of operational monitoring data, resulting in data silos. The smallest unit of the DMA (Digital Domain Name) zone is a ring-shaped pipe network. DMA zones systematically divide the vast vertical pipeline system into multiple larger management units. Each water meter has a corresponding area label, facilitating sorting, statistics, searching, and zoned management during use. Regarding data integration and management, water meters are set up at different levels according to certain rules, allowing for step-by-step data accumulation during analysis, resulting in stronger logic and reducing the likelihood of significant instrument errors due to large differences in meter specifications between upper and lower levels. All water outflows within the DMA zone containing the ring-shaped pipe network are within the monitoring range of the metering facilities, enabling more detailed and accurate detection of leaks in the pipe network, rapid response to accidents such as pipe bursts and appliance leaks, and achieving refined water management. In practical applications, considering the economic efficiency of engineering construction, water meters may not be necessary at the branch pipe connections of the ring network; only DMA (Diverterless Domain Meter) water meters are required. When a leak alarm occurs in a DMA zone, staff can go to the managed area and locate the leak by checking each floor. However, building water supply systems are mostly concealed works, making them difficult to detect through manual inspection alone. Therefore, whether or not to install remote water meters at the branch pipe connections of the ring network to assist in identifying a more accurate leak location has its advantages and disadvantages, and should be determined based on the specific project's economic conditions and the importance level of the building construction.

[0023] Logical guide Figure 1On the one hand, it assists managers in identifying and determining the location of leaks; on the other hand, it complements the visual interface of the information system to indicate specific management areas. In practical operation and maintenance management, the DMA (District Management Area) system demonstrates stronger logic and a more holistic approach. Upstream and downstream water meters are linked through a logic diagram. Due to overall cost and economic considerations, remote control valves are installed in conjunction with the DMA zone water meters. Remote control valves are not installed at the water meters on the ring branch pipes. When a leak occurs at a water-using end within the DMA zone, the remote control valve at the DMA zone water meter is responsible for shutting off the water supply to that area. Therefore, if a remote water meter is installed at a water-using branch pipe, the leak information should be transmitted to the DMA zone water meter through a logic diagram, and the DMA zone water meter will then control the opening and closing of the remote control valve. The valve closure action is generally used during holidays (including weekends) or in unattended areas with high requirements for indoor water control, to prevent excessive indoor water volume in case of a leak, which could lead to floor flooding, water damage to building materials, short circuits, or even fires. Attached Figure Description

[0024] Figure 1 DMA zoning diagram of municipal water supply network;

[0025] Figure 2 This is a diagram of the building water supply network layout for Example 1.

[0026] Figure 3 DMA Partition Logical Diagram

[0027] Figure 4 Example 1 uses statistical curves to illustrate the trend of pipeline flow changes.

[0028] Figure 5 The figure shows the statistical curve of pressure changing with flow rate in Example 1.

[0029] Figure 6 correspond Figure 1 This is a specific application of DMA2-1-1. Detailed Implementation

[0030] The embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited to the following embodiments.

[0031] Example 1: Taking the water supply network layout of a building with 8 floors above ground and 1 floor underground as an example ( Figure 2 )

[0032] (1) This method mainly consists of four parts: system design, remote transmission equipment, cloud storage server and information monitoring platform.

[0033] (2) See Figure 2The building's water supply network is divided into DMA (Diverterless DMA) zones through system design, and water meters in different zones are numbered accordingly. First, based on different water pressure supply methods, the building's water supply network is divided into two management zones: DMA1 (municipal direct supply, primary water meter) and DMA2 (secondary pressurization, primary water meter). Second, based on the boundary between above-ground and underground areas, DMA1 is further subdivided into DMA1-1 (secondary water meter) and DMA1-2 (secondary water meter) zones (if more DMA zones are added, they are further numbered sequentially until a water supply branch pipe connecting to water appliances appears, at which point further subdivision is not performed). Similarly, for the secondary pressurized water supply section, based on the management needs of different floors, the floors are evenly divided into two management zones, with three floors forming one management zone. Remote water meters are installed at the beginning of each management unit, and the water meters should have drip-metering accuracy, i.e., the initial flow rate should be accurate to 0.002 m³ / h. 3 / h; At the same time, pressure sensors and remote control valves are installed in the corresponding management zones. The pressure sensors mainly identify water leakage accidents in the zone by combining the changes in pressure drop with the flow rate data. When a water leakage accident is confirmed, the remote control valve is activated to shut off the water supply to the DMA zone. In addition, according to the different uses of the building, the metering requirements of payment or management units, remote water meters (three-level water meters) should be added to the corresponding water points connected in the DMA zone to further confirm the leakage situation of the subdivided functions and areas of the pipe network.

[0034] (3) See Figure 2 , Figure 3 Water supply branch pipes should be set up according to the different uses, payment or management units of the building, and the water supply branch pipes should be directly connected to water appliances. In addition to numbering the DMA zones, the remote water meters should also be numbered. The format of the remote water meter number is: DMA zone number + water meter number, such as DMA1-1-WM1, DMA1-2-WM1, etc.; a logical diagram should be established for water meters with hierarchical relationships within the DMA zone. Figure 3 (This is just an example instruction manual) and it is associated level by level. When the data of one of the water meters is abnormal (such as water leakage in the pipeline, pipe burst, or damage to sanitary appliance valves), the online monitoring system will prompt and alarm the DMA partition associated with that water meter and the associated upper-level water meter, thereby realizing level-by-level alarm and quickly locking the abnormal range.

[0035] (4) The cloud storage server mainly serves as the carrier for online monitoring data storage. It is used to collect real-time operating data collected by remote devices such as remote water meters and pressure sensors, and to provide the function of transmitting real-time operating data for the supervision of the information management platform.

[0036] (5) See Figure 4 , Figure 5Appendix 1 shows that the information monitoring platform is a real-time visualization tool for operating data, including functions such as remote monitoring of operating data, early warning and alarm for pipeline leakage, and remote control of valves; among them, the remote monitoring function of operating data mainly displays the trend of pipeline flow change in the form of statistical curves. Figure 4 ), and the trend of pressure change with flow rate ( Figure 5 The early warning and alarm system for pipeline leaks primarily identifies leaks by monitoring data such as nighttime (2:00-4:00 AM) flow rate and sustained high flow rate during the day (7:00-7:00 PM). This data triggers early warnings and alarms. For example, using a pipeline containing only a sink and faucet, the flow monitoring data in Figure 1 and Appendix 1 can be compared to determine which sanitary fixture is in use when the flow data is displayed. Remote valve control refers to the system's ability to promptly close remote control valves in the corresponding area or pipe section when a leak occurs. Leaks generally include dripping, bursting, or broken pipe fittings, as well as damage to the shut-off valves of sanitary fixtures.

[0037] (6) See Figure 2 , Figure 4 , Figure 5 Appendix 1 shows that water usage in different zones is connected from their respective ring pipes according to different functions and uses, and remote water meters are installed. Taking a water leakage accident in the downstream section of the water supply branch pipe corresponding to water meter DMA1-1-WM3 in zone DMA1 as an example, assuming that there are 3 handwashing basins (sensor faucets) and 2 ordinary faucets installed on a certain section of the pipe, the maximum flow rate of the faucets used simultaneously in this section should be 1.35m³. 3 / h; First, the flow rate and pressure change curves under normal pipeline conditions should be recorded: 1) Appendix Figure 2 The flow rate between 2:00 AM and 4:00 AM did not show a uniform, continuous, or stable flow rate when no one was using the water; 2) Appendix Figure 4 During the period from 0:00 to 6:00, the water supply pressure exhibits a uniform change and does not fluctuate drastically due to water outflow; 3) such as Figure 4 During the daytime period from 7:00 to 19:00, the water supply pressure fluctuates intermittently due to daily water usage; 4) Appendix Figure 4 During the 2:00 PM period (shown in red), the concentrated water usage caused a short-term, sustained drop in pressure, which quickly rebounded. Through the changes in the flow and pressure curves described above, we obtained the flow and pressure variation curves under normal flow conditions. In the event of a leak, the information monitoring platform will quickly display the following abnormal information: 1) A continuous and stable flow variation curve (greater than 0.002 m³ / h) will appear between 2:00 AM and 4:00 AM. 3 1) The water supply pressure will increase with the continuous output of large flow rates (far greater than 1.35m).3 / h), and pressure drop (i.e., pressure decrease) occurs, with the pressure drop being more significant due to the large leakage volume; 3) If the flow rate continues to increase for more than 5 minutes in a short period of time, the pressure will also drop sharply and will not recover for a long time. Through the above mechanism, the DMA1-1-WM3 water meter corresponding to the water supply branch pipe of the information system will trigger an abnormal flow data alarm. The alarm information is transmitted to the next-level water meter DMA1-1 and DMA1 through the association mechanism of the information system, and an alarm message is issued. Finally, the information management system generates alarm information and system diagram, indicating that a water pipe section in a certain functional area on the first basement floor has a water leakage accident, and quickly locates the water point, guiding management personnel to the scene for handling in a short time. In practical applications, leaks in the pipeline network are generally more hidden and require multiple checks of the nighttime flow to finally determine the cause. However, accidents such as pipe bursts and damaged stop valves can be determined in a short time through the rapid changes in abnormal data such as flow rate and pressure.

[0038] Table 1: Flow Parameters of Sanitary Fixtures

[0039]

[0040] Note: ① Based on the on-site inspection and product quality inspection report, the handwashing basin installed on-site is equipped with a sensor faucet and is a water-saving appliance with a water efficiency rating of Class 1 and a rated flow rate of 0.09m³ / h. 3 / h.

[0041] ② The actual flow rate of a regular quick-opening faucet is closely related to the water supply pressure and the degree of opening. Studies based on monitoring data show that its actual flow rate is generally greater than the designed rated flow rate.

Claims

1. A method for online monitoring and leakage management of building water supply system networks, characterized in that, It mainly includes four parts: building water supply system network design (1), remote transmission equipment (2), cloud storage server (3), and information monitoring platform (4); the remote transmission equipment is installed in the building water supply system network; the information monitoring platform is electrically or signal connected to the remote transmission equipment, and the information monitoring platform is used for remote monitoring of the data of the remote transmission equipment, early warning alarm of network leakage, and remote control of valves; the cloud storage server is electrically or signal connected to the information monitoring platform and is used to analyze leakage. in: The design of building water supply system network (1) includes the DMA zoning of building water supply system network; The building's water supply network is divided into several DMA management zones based on the building's permanent boundaries. The DMA zoning principle considers the isolation between buildings and floors, i.e., the selection of permanent boundaries; including: ① zoning of different buildings; ② zoning of the building's above-ground and underground floors; ③ evenly dividing multiple floors into multiple different zones; ④ zoning between horizontal plane spaces. The pipe network within each zone is arranged in a ring. Each zone is equipped with a remote water meter that measures the flow rate entering the zone. This allows for the independent calculation of the water supply, water consumption, and leakage rate of each zone, providing technical conditions for carrying out pipeline leakage management and monitoring. The ring arrangement is as follows: there is a pipe connected to the ring pipe as the water inlet pipe of the ring pipe. The water inlet pipe is connected to two branches of the ring pipe at the same time to supply water. Multiple water outlets are set on the ring pipe according to the needs to supply the next level. Different numbers of water outlets are set on the same ring pipe according to the needs or added or removed later, which means different numbers of the next level of water supply are added or removed. Valves are installed on the building's water supply system pipeline. The remote transmission equipment (2) includes a smart remote water meter, a pressure sensor and a remote electric control valve. It is installed on the building water supply pipeline of the building water supply system network to collect flow and pressure changes, and to number the smart remote water meter, pressure sensor and remote electric control valve. Cloud storage server (3) is an important part of information technology. It is used to collect working condition data collected by remote transmission equipment and provide data storage support for remote monitoring and data analysis of information monitoring platform. The information monitoring platform (4) includes remote monitoring of operating data, early warning alarm for pipeline leakage, and remote control of valves; among them, the remote monitoring function of operating data mainly displays the changing trend of pipeline flow and pressure in the form of statistical curves; the early warning alarm for pipeline leakage mainly identifies pipeline leakage by monitoring the pipeline night flow, continuous large flow during the day and sudden drop in pipeline pressure, and issues early warning and alarm prompts for pipeline leakage in the corresponding area; the remote control of valves mainly refers to the system promptly closing the remote control valves of the corresponding area or pipe section through leakage linkage when pipeline leakage or pipe burst accident occurs, and quickly handling water leakage accident.

2. The method for online monitoring and leakage management of a building water supply system network according to claim 1, characterized in that, When dividing the building's above-ground and underground floors into zones corresponding to the DMA zone of the building's water supply system network, the zoning of the building's above-ground and underground floors should be considered, while also taking into account different water supply pressure forms.

3. The method for online monitoring and leakage management of a building water supply system network according to claim 1, characterized in that, When dividing the DMA zone of the building water supply system network into zones ④ between the horizontal plane spaces, for floors with large horizontal plane spaces and complex functions, further consideration should be given to dividing the water use of different functions within the same floor.

4. The method for online monitoring and leakage management of a building water supply system network according to claim 1, characterized in that, When the remote transmission device (2) is installed on the building water supply pipeline of the building water supply system network, it is installed at the inlet of the ring-shaped pipeline in the DMA management zone.

5. A method for online monitoring and leakage management of a building water supply system network according to claim 1, characterized in that, The design of the building water supply system network (1) includes the DMA partitioning of the building water supply system network. The resulting building water supply system network includes the following: multiple primary branch single pipes are connected to the main building water supply pipe. Multiple secondary branch single pipes or / and ring-shaped pipes are connected to each primary branch single pipe. Multiple tertiary branch single pipes or / and ring-shaped pipes are connected to each secondary branch single pipe. Multiple quaternary branch single pipes or / and ring-shaped pipes are connected to each tertiary branch single pipe, and so on. At the same time, nested branch single pipes are also connected to the ring-shaped pipes as needed. Multiple other nested branch single pipes or / and ring-shaped pipes are connected to the further nested branch single pipes, and so on. Each branch single pipe and each ring-shaped pipe is numbered. The building water supply system network is designed with different levels of branch single pipes according to needs; different levels of nested branch pipes are connected to the ring-shaped pipe network according to needs; and the specific water-using terminals are the ring-shaped pipe networks that divide each user into DMA management zones.

6. A method for online monitoring and leakage management of a building water supply system network according to claim 1, characterized in that, The remote transmission device (2) collects flow and pressure changes, which are used by the cloud storage server (3) to analyze the leakage status of the pipeline network. When a large number of water leakage accidents occur, the water leakage accident is confirmed by the continuous increase of nighttime flow, short-term flow and sudden pressure drop. Then, through the remote control linkage mechanism of the information monitoring platform (4), the valve of the corresponding water supply pipeline section is remotely closed to control the further deterioration of the water leakage accident.

7. A method for online monitoring and leakage management of a building water supply system network according to any one of claims 1-6, specifically comprising the following operational steps: 1) Select a remote water meter capable of drip metering, install remote equipment based on the DMA zoning method and establish an online monitoring system for the pipeline network. The DMA zoning pipelines connected to the water supply branch pipes of each water appliance are arranged in a ring to form a closed water supply pipeline. That is, all water supply branch pipes connected out of the DMA zoning are within the monitoring range of the remote water meter corresponding to the DMA zoning, and under normal circumstances, the reading of the inlet water meter is equal to the sum of the readings of the water meters of each water supply branch pipe. 2) Number the remote water meters, establish a logical diagram association system for water meters with hierarchical relationships within the DMA partition, and associate them level by level. When the data of one water meter is abnormal, the online monitoring system will prompt and alarm the DMA partition associated with the water meter and the associated upper-level water meter, thereby realizing hierarchical alarm and quickly locking the abnormal range. 3) Observe the changes in flow and pressure of each pipeline at night and during the day, and screen and establish the change curves under normal operating conditions, i.e., the standard curves; 4) Set alarm thresholds for the system through the information monitoring platform; when there is leakage, the nighttime flow exceeds the standard value of the corresponding time period by x%; when there is a pipe burst, the real-time flow for more than 5 minutes within 24 hours is much greater than the sum of the maximum flow of all water-using appliances in this pipe section, and at the same time, there is a sudden drop in the online water supply monitoring pressure for a long period of time; when a water-using appliance is damaged, if the monitored flow for more than 10 minutes is equal to the rated outflow of the water-using appliance, an alarm can be triggered and the abnormal data information can be transmitted to the next higher level water meter through the preset association system of the logic diagram and a report can be generated. 5) The report should include the time, location, DMA partition number, water meter number where abnormal data occurred, preliminary judgment of abnormal status, and real-time monitoring of flow and pressure change curves; maintenance personnel should carry out actual maintenance based on the report.

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