Reformed building water supply system and reconstruction method for old community

Abstract

The invention relates to a reconstructed building water supply system and reconstruction method for an old community and relates to the technical field of water supply reconstruction, the reconstructed building water supply system comprises a main water supply pipeline and water supply units connected to all buildings of the community, and each water supply unit comprises a steady flow tank and a booster pump station which are arranged on the bottom layer of the building and connected in sequence; the output end of the water supply system is communicated with water supply nodes of different floors through a diversion pipeline, a plurality of bypasses in the diversion pipeline are connected with the vertical pipe and the water supply nodes of all the floors, each water supply node corresponds to one bypass, and a pressure regulating device is arranged at an inlet of each water supply node, so that water pressure and flow of all the water supply nodes can be accurately regulated, and stable water flow output is achieved; sensing equipment is arranged on the shunting pipeline, and the running condition of the water supply system can be mastered in real time in cooperation with the central controller; according to the transformation method, the strategy that transformation is preferentially conducted in batches according to fatigue grades is adopted, the overall water supply condition of the community is not affected, and before transformation, original pipelines are detected through professional equipment, the fatigue grades are divided, and seriously damaged pipelines are preferentially replaced.

Description

Technical Field

[0001] This invention relates to the technical field of water supply renovation, and in particular to a water supply system and renovation method for renovated buildings in old residential communities. Background Technology

[0002] Old residential areas were built a long time ago, and the water supply system was designed to low standards during construction. The water supply pipes used were mostly made of traditional materials such as cast iron and concrete. After long-term use, these pipes generally have serious problems of corrosion and scaling, which not only reduces the water delivery capacity of the pipes, but also causes water quality deterioration, posing a serious threat to the health of residents.

[0003] During the renovation of secondary water supply systems in old residential areas, the plan to completely shut off the water supply for renovation is difficult to implement due to limitations such as construction conditions and residents' lives. Prolonged water outages would seriously affect residents' normal lives, easily triggering resistance and increasing the difficulty of advancing the renovation work.

[0004] Meanwhile, existing water supply renovations in old residential areas often involve only simple pipe replacements, lacking advanced control, monitoring, and management systems. The operational status of the renovated water supply facilities is difficult to monitor in real time. Once problems such as leaks, unstable water pressure, or substandard water quality occur, manual inspection and repair are often required, which is not only time-consuming and labor-intensive but also delays the opportunity to deal with the problems, further affecting residents' water usage experience. Summary of the Invention

[0005] In order to improve the problems mentioned in the background art, the present invention provides a water supply system and renovation method for old residential communities.

[0006] The present invention provides a water supply system and renovation method for renovated buildings in old residential communities, which adopts the following technical solution: A water supply system for the renovation of old residential communities includes a main water supply pipeline and water supply units connected to the main water supply pipeline and connected to each building in the community. The water supply unit includes a flow stabilizing tank and a booster pump station located on the ground floor of the building and connected in sequence. Its input end is connected to the main water supply pipeline through a branch water supply pipeline, and its output end is connected to the water supply nodes of different floors of the building through a diversion pipeline. The flow stabilizing tank on the ground floor of the building can effectively alleviate the impact of water pressure fluctuations in the main water supply pipeline on the building's water supply. In conjunction with the booster pump station, it can accurately compensate for the insufficient water pressure of the original water supply system in the old residential community. Pressure regulating equipment is provided at the inlet of the water supply node.

[0007] Preferably, the diversion pipeline includes a riser, a return pipe, and multiple bypasses. The return pipe enables the circulation and linkage of water supply and return, improving the problems of water accumulation and stagnant water in the original riser of the old residential area, while enhancing the scalability of the system. The bypasses connect the riser to the water supply nodes of each floor, and each water supply node corresponds to one bypass.

[0008] In a further preferred embodiment, the riser is equipped with a one-way valve that limits the water flow from the lower floors of the building to the upper floors, preventing backflow caused by negative pressure or a sudden drop in water pressure in the upper floors, avoiding reverse impact of backflow on the booster pump station, and reducing the wear and tear on the booster pump station equipment.

[0009] Preferably, a water supply system for the renovation of old residential buildings also includes a set of sensing devices installed on the diversion pipeline, including a pressure sensor and a flow meter, which facilitates timely detection of problems such as abnormal water pressure and insufficient flow. The return water pipe is also equipped with a water quality sensor, which can monitor the water quality indicators of the circulating water flow in real time, provide timely warnings of water pollution problems, and ensure the safety of residents' water use.

[0010] Preferably, a water supply system for the renovation of old residential buildings also includes a central controller that is communicatively connected to sensing devices. The central controller can interact with terminal devices through a remote communication unit, realizing centralized collection, analysis and management of water supply system operation data. This eliminates the need for manual inspection of each device's status, reducing the workload of maintenance personnel. Maintenance personnel can remotely view system operation data in real time through terminal devices, enabling remote operation and maintenance of the water supply system. This addresses the issues of insufficient maintenance personnel and untimely maintenance response in old residential areas.

[0011] Preferably, the branch water supply pipeline is equipped with a first isolation device, which is a gate valve, a stop valve, or a solenoid valve. It is configured to selectively isolate or allow the flow between the main water supply pipeline and the water supply unit, thereby achieving zoned control of the water supply, preventing water supply failures in a single building from affecting the normal water supply of the entire community, and improving the overall reliability of the community's water supply. At the same time, it can selectively isolate or allow the flow between the main water supply pipeline and the water supply unit, facilitating inspection and maintenance, ensuring the continuity of the community's overall water supply, and providing convenience for the segmented modification and commissioning of the water supply system.

[0012] Preferably, the pressure regulating device includes a pressure reducing valve and a flow control valve connected in series. The pressure regulating device is sealed to the inlet of the water supply node through a flange or quick connector. It is configured to regulate the water pressure and flow rate of the water supply node, and can flexibly adjust the water pressure according to the water demand of different floors to achieve balanced water supply pressure on each floor. This avoids the situation where the water pressure on the lower floors is too high, causing pipe damage, and the water flow rate on the upper floors is too slow. At the same time, it reduces the wear and tear on water-using equipment caused by uneven water pressure.

[0013] A method for renovating the water supply system of a building in an old residential community, comprising the following steps: Step 1: Inspect the existing pipelines in the community using ultrasonic flaw detection equipment or endoscopic imaging equipment, classify the fatigue level of the existing pipelines, and construct a three-dimensional model of the pipelines of each building in the community using BIM technology to determine the routing of diversion pipelines, the location of pressure regulating equipment, and the location of sensing equipment.

[0014] Step 2: Under the premise of ensuring the overall water supply of the community, replace the original pipelines in batches according to their fatigue level from high to low; Step 3: Install a flow stabilizing tank and a booster pump station in the leveled area on the ground floor of the building, and connect them to the main water supply pipeline; Step 4: Build a central controller and connect the sensing devices installed in each batch to the central controller; Step 5: Close the first isolation device between the water supply unit and the main water supply pipeline, start all equipment of the water supply unit for trial operation, collect operation data through the central controller and generate an acceptance report.

[0015] The above-mentioned renovation plan is tailored to the existing pipeline conditions, spatial requirements, and residents' needs in old residential areas. It is highly practical and adaptable, and can be implemented quickly to promote the efficient upgrading of water supply systems in old residential areas.

[0016] In summary, the present invention has the following beneficial technical effects: 1. The diversion pipeline of this invention adopts a parallel structure design. Multiple bypasses in the diversion pipeline connect the riser to the water supply nodes of each floor. Each water supply node corresponds to one bypass, so that the water supply to each water supply node on each floor is relatively independent, avoiding the impact of a single path failure on the overall water supply. Pressure regulating equipment is installed at the inlet of the water supply node, which can accurately adjust the water pressure and flow of each water supply node, ensuring that residents on different floors and with different water needs can obtain a stable water supply, achieving stable water output, efficient flow and flexible adjustment. At the same time, the system supplies water through a flow stabilizing tank and a booster pump station in conjunction with the main water supply pipeline. The flow stabilizing tank does not need to reduce pressure, and can make full use of the original water pressure of the main water supply pipeline, improving water supply efficiency while reducing energy consumption.

[0017] 2. This invention, by installing pressure sensors, flow meters, water quality sensors, and other sensing devices on the branch pipeline, and cooperating with a central controller that is connected to them, can monitor the real-time operation of the water supply system. The sensing devices can collect key operational data such as water pressure, flow rate, and water quality in real time and transmit them to the central controller. The central controller can interact with terminal devices through a remote communication unit, allowing staff to remotely monitor the system operation without on-site inspections. When faults such as abnormal water pressure or excessive water quality occur, the central controller can quickly locate the fault area, avoiding the time-consuming and labor-intensive problems of traditional manual troubleshooting. At the same time, the pressure regulating equipment set independently at each water supply node facilitates individual maintenance of the fault area, improving fault handling efficiency and ensuring water supply safety.

[0018] 3. The renovation method corresponding to this invention adopts a phased and priority renovation strategy based on fatigue level, which can realize the sequential renovation of local areas in the community without affecting the overall water supply of the community. Before the renovation, the original pipelines are tested by professional equipment and classified into fatigue levels. During the renovation, pipelines with severe corrosion, blockage, and damage are replaced first. In addition, during the renovation process, the first isolation device on the branch water supply pipeline selectively isolates the flow between the renovation area and the main water supply pipeline, ensuring the normal water supply of the unrenovated areas. This improves the problem of residents' resistance caused by traditional full water outage renovation and enhances the operability of the renovation work and residents' satisfaction.

[0019] 4. In addition, based on the need for green water conservation, this invention specifically addresses the new problem of resource utilization when using large-capacity flow stabilizing tanks, and provides a water-saving mechanism with graded response and water level linkage. It is adapted to the characteristics of limited space and precious water resources commonly found in the renovation of old residential areas, and embodies the concept of green and energy-saving renovation while improving the quality of water supply. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a water supply system for the renovation of old residential buildings according to Embodiment 1 of the invention; Figure 2 This is a schematic diagram of the structure of a water supply system for the renovation of old residential buildings, according to Embodiment 3 of the invention.

[0021] Explanation of reference numerals in the attached figures: 1. Main water supply pipeline; 2. Water supply unit; 21. Flow stabilizing tank; 22. Booster pump station; 3. Branch water supply pipeline; 4. Diversion pipeline; 41. Riser; 42. Return water pipe; 43. Bypass; 44. Check valve; 5. Pressure regulating equipment; 6. Sensing equipment; 61. Water quality sensor; 7. First isolation device; 8. Second isolation device; 9. Drainage pipeline. Detailed Implementation

[0022] The following combination Figures 1-2 The present invention will be described in further detail below.

[0023] Example 1 Embodiment 1 of the invention discloses a water supply system for the renovation of old residential buildings.

[0024] Reference Figure 1 A water supply system for the renovation of old residential communities includes a main water supply pipeline 1 and water supply units 2 that connect the main water supply pipeline 1 and are connected to each building in the community.

[0025] The main water supply pipeline 1 is connected to the input end of the water supply unit 2 through the branch water supply pipeline 3. The branch water supply pipeline 3 is made of PE water supply pipe by hot-melt welding to ensure sealing performance.

[0026] Water supply unit 2 is connected to each building in the community. The output end of water supply unit 2 is connected to the water supply nodes of different floors of the building through the diversion pipeline 4, and pressure regulating equipment 5 is installed at the inlet of the water supply node.

[0027] Furthermore, the water supply unit 2 includes a flow stabilizing tank 21 and a booster pump station 22 located on the ground floor of the building and connected in sequence.

[0028] In this embodiment, a diaphragm-type stabilizing tank with a volume of 100L-500L is selected to balance the water supply pressure, eliminate water hammer impact, and avoid frequent start-stop of the booster pump station 22. The booster pump station 22 includes a main pump and a standby pump. The standby pump switches when the main pump fails to ensure the continuity of water supply.

[0029] By combining the flow stabilizer tank 21 and the booster pump station 22, the problem of insufficient water supply pressure in old residential areas can be effectively compensated. Combined with the pressure regulating equipment 5 at each water supply node, the water pressure of different floors and different water use scenarios can be accurately adapted, avoiding problems such as water outages in high-rise buildings and excessive water pressure in low-rise buildings.

[0030] Among them, the booster pump station 22 uses, but is not limited to, commonly used booster pumps and air pumps. It can also use air pumps and variable frequency pumps. When the variable frequency pump is in use, it mainly transmits the changes in water supply pressure and flow rate to the sensor. The sensor reacts to the situation to complete the monitoring of changes in the user's water consumption. The frequency converter of the variable frequency pump changes the power supply frequency of the motor, so as to adjust the speed of the variable frequency pump and change the outlet pressure of the variable frequency pump, thereby realizing the secondary water supply to meet the user's tap water needs.

[0031] Reference Figure 1 The diversion pipeline 4 includes a riser 41, a return pipe 42 and multiple bypasses 43. The return pipe 42 is laid along the vertical shaft inside the building to form a circulation pipe section. The bypasses 43 connect the riser 41 to the water supply nodes on each floor, and each water supply node corresponds to one bypass 43.

[0032] The branch water supply pipeline 3 is equipped with a first isolation device 7, which is a gate valve, stop valve or solenoid valve, and is configured to selectively isolate or allow the flow between the main water supply pipeline 1 and the water supply unit 2.

[0033] The riser 41 is equipped with a one-way valve 44 that limits the water flow from the lower floors to the upper floors of the building. The one-way valve 44 is a lift-type one-way valve, which is installed at the end of the riser 41 near the booster pump station 22 to ensure that the water flow can only flow from the lower floors to the upper floors and prevent water backflow from the upper floors from causing water pressure fluctuations.

[0034] Reference Figure 1A water supply system for the renovation of old residential areas also includes a set of sensing devices 6 installed on the diversion pipe 4, which includes a pressure sensor, a flow meter and an electric control valve. A water quality sensor 61 is also installed on the return pipe 42. In this embodiment, the water quality sensor 61 is a multi-parameter water quality detector that can detect parameters such as turbidity, residual chlorine and pH value.

[0035] Reference Figure 1 A water supply system for the renovation of old residential buildings also includes a central controller that is communicatively connected to sensing device 6 and first isolation device 7. The central controller adopts a PLC controller and has a built-in remote communication module, which can realize data interaction with terminal devices such as mobile phones and computers of management personnel through remote communication units. The first isolation device 7 is electrically connected to the central controller and can realize remote control switching, which facilitates the quick isolation of water flow during equipment maintenance and fault handling. The central controller is also connected to a touch screen and installed in the equipment room on the ground floor of the building, which facilitates on-site viewing of operating data and manual operation of equipment.

[0036] A pressure regulating device 5 is installed at the inlet of the water supply node. The pressure regulating device 5 includes a pressure reducing valve and a flow control valve connected in series. The pressure regulating device 5 is sealed to the inlet of the water supply node through a flange or quick connector. The pressure regulating device 5 is connected to the central controller and is configured to regulate the water pressure and flow of the water supply node.

[0037] Example 2 Embodiment 2 discloses a method for renovating the water supply system of old residential buildings, based on Embodiment 1.

[0038] Reference Figure 1 A method for renovating the water supply system of an old residential building, using the water supply system of Example 1 for renovating an old residential building, includes the following steps: Step 1: Conduct an on-site survey before the secondary water supply renovation to understand the current status of the water supply system in the old community. Use ultrasonic flaw detection equipment or endoscopic imaging equipment to inspect the original pipelines in the community. The inspection items include wall thickness, degree of corrosion, and leakage points. Classify the fatigue level of the original pipelines and prioritize the replacement of the original pipelines with higher fatigue levels.

[0039] Based on the actual conditions of the community, a renovation plan should be developed on-site to avoid material waste and construction conflicts caused by blind renovation, thereby reducing the total renovation cost.

[0040] In this embodiment, three fatigue levels can be classified based on the test results: Level 1 severe fatigue is defined as a wall thickness loss rate or thickening rate ≥30% or the presence of obvious leakage points; Level 2 moderate fatigue is defined as a wall thickness loss rate of 15%-30%; and Level 3 mild fatigue is defined as a wall thickness loss rate <15%. At the same time, an endoscopic imaging device is used to detect the blockage inside the pipeline to assist in determining the fatigue level.

[0041] By using BIM technology to construct 3D models of the pipelines of each building in the community, importing data such as the community master plan and building construction drawings, the original pipeline locations are accurately located in the model, and the routing of the diversion pipelines, the layout of pressure regulating equipment, and the layout of sensing equipment are determined in combination with the building structure and residents' water demand.

[0042] Step 2: Under the premise of ensuring the overall water supply of the community, replace the original pipelines in batches according to the fatigue level from high to low. This batch replacement method, combined with the flexible control of the first isolation device 7, can complete the renovation while ensuring the overall water supply of the community, and minimize the interference with residents' normal water use.

[0043] When there are rooftop water tanks in older residential areas, these rooftop water tanks can be removed or retained as fire-fighting water tanks.

[0044] Step 3: Install the flow stabilizing tank 21 and the booster pump station 22 in the flat area of ​​the building's ground floor, and connect them to the main water supply pipeline 1. Install the first isolation device 7 between the water supply unit 2 and the main water supply pipeline 1.

[0045] Step 4: Build a central controller and connect the sensing devices 6 installed in each batch to the central controller.

[0046] Step 5: Close the first isolation device 7 between water supply unit 2 and main water supply pipeline 1, and start all equipment of water supply unit 2 for trial operation.

[0047] Trial operation enables quantitative evaluation of the renovation effect, avoids rework due to substandard renovation, and improves the acceptance efficiency and quality reliability of renovation projects.

[0048] During the trial operation, the first isolation device 7 between the water supply unit 2 and the main water supply pipeline 1 is first turned on, one main pump of the booster pump station 22 is started and run for 30 minutes, then switched to another main pump and run for 30 minutes. Finally, the standby pump is started and run for 30 minutes.

[0049] During the trial operation, the central controller collects the operating data of each sensing device 6 in real time, including water pressure, flow rate, water quality parameters at each monitoring point, and the operating status of the equipment. The collected data is analyzed to determine whether the water pressure is stable within the set range, whether the flow rate meets the residents' water needs, and whether the water quality parameters meet the set standards ("Standards for Drinking Water Quality").

[0050] The trial run lasts for 72 hours. If there are no equipment failures and the data is stable and meets the standards during the period, an acceptance report will be generated. After the acceptance is passed, it will be officially put into use.

[0051] Example 3 Embodiment 3 of the invention discloses a water supply system for the renovation of old residential buildings, which meets the needs of green water conservation, and provides a solution for water quality renewal, especially for the use of large-capacity flow stabilizing tanks in Embodiments 1 and 2.

[0052] Reference Figure 2 A water supply system for the renovation of old residential communities includes a main water supply pipeline 1 and water supply units 2 connected to the main water supply pipeline 1 and connected to each building in the community. The main water supply pipeline 1 is connected to the input end of the water supply unit 2 through a branch water supply pipeline 3. The branch water supply pipeline 3 is equipped with a first isolation device 7, which is a gate valve, stop valve, or solenoid valve, and is configured to selectively isolate or allow the flow between the main water supply pipeline 1 and the water supply unit 2. The water supply unit 2 is connected to each building in the community. The output end of the water supply unit 2 is connected to the water supply nodes of different floors of the buildings through a diversion pipeline 4, and a pressure regulating device 5 is installed at the inlet of the water supply node.

[0053] Furthermore, the water supply unit 2 includes a flow stabilizing tank 21 and a booster pump station 22 located on the ground floor of the building and connected in sequence. The flow stabilizing tank 21 is connected to a drainage pipe 9, and a second isolation device 8 is provided on the drainage pipe 9. The second isolation device 8 is a gate valve, a stop valve, or a solenoid valve, which is configured to selectively isolate or open the drainage pipe 9 to maintain and discharge the water volume in the flow stabilizing tank 21.

[0054] In addition, the flow stabilizing tank 21 is also equipped with a water level sensor, which can collect water level data in the flow stabilizing tank 21 in real time, providing data support for water release and water replenishment control.

[0055] Furthermore, the diversion pipeline 4 includes a riser 41, a return pipe 42, and multiple bypasses 43. The return pipe 42 is laid along the vertical shaft inside the building to form a circulating pipe section. The bypasses 43 connect the riser 41 to the water supply nodes on each floor, and each water supply node corresponds to one bypass 43.

[0056] Reference Figure 2 The system also includes a set of sensing devices 6 installed on the diversion pipeline 4, which includes a pressure sensor, a flow meter and an electric control valve. A water quality sensor 61 is also installed on the return water pipe 42 and in the flow stabilizing tank 21. In this embodiment, the water quality sensor 61 is a multi-parameter water quality detector, which can detect core water quality parameters such as turbidity, residual chlorine and pH value in real time and transmit the detection data to the central controller in real time. The system also includes a central controller that is communicatively connected to the sensing devices 6 and the first isolation device 7. The central controller adopts a PLC controller, has a built-in remote communication module, and is connected to a touch screen and installed in the equipment room on the ground floor of the building, which facilitates on-site viewing of operating data and manual operation of equipment.

[0057] In this embodiment, the drainage pipe 9 has a structure different from that in embodiment 1. One end of it is sealed and connected to the drain outlet at the bottom of the flow stabilizing tank 21, and the other end extends to the community sewage treatment network or a designated drainage area to discharge water in the flow stabilizing tank 21 that does not meet the water quality standards or needs to be replaced regularly.

[0058] In this embodiment, the central controller has a built-in algorithm and program for comprehensively judging the water release and replenishment of the stabilizing tank 21 based on multiple water quality indicators. Using turbidity, residual chlorine, and pH values ​​collected by the water quality sensor 61 as core judgment parameters, combined with water level data collected by the water level sensor, the system automatically decides whether to initiate the water release or replenishment process through threshold judgment, weight allocation, and comprehensive scoring. This ensures that the water quality in the stabilizing tank 21 always meets the set standard requirements (《Standards for Drinking Water Quality》). The program setting method is as follows: 1. Preprocess the collected turbidity (T), residual chlorine (C), and pH (P) parameters, and set the weighting coefficients, standard threshold ranges, and exceedance threshold ranges for each parameter.

[0059] The turbidity (T), residual chlorine (C), and pH (P) data collected by the water quality sensor 61 are preprocessed. Abnormal fluctuation data are removed by taking the average value of multiple consecutive data collections. In this embodiment, more than three data collections are taken.

[0060] In a more specific embodiment, standard threshold ranges and exceedance threshold ranges are set for each parameter. Specifically, the standard threshold range for turbidity is T≤1 NTU, and exceedance occurs when T>1 NTU, with a weighting factor of 0.4 affecting the score percentage. The standard threshold range for residual chlorine is 0.2-4.0 mg / L, and exceedance occurs when C<0.2 mg / L or C>4.0 mg / L, with a weighting factor of 0.3 affecting the score percentage. The standard threshold range for pH value P is 6.5~8.5, and exceedance occurs when P<6.5 or P>8.5, with a weighting factor of 0.3 affecting the score percentage.

[0061] 2. Each water quality parameter after pretreatment is evaluated individually using a 100-point scoring system. If the parameter is within the standard threshold range, it receives a full score of 100 points; if it is outside the threshold range, points are deducted based on the degree of exceedance.

[0062] In a more specific embodiment, the following settings can be made: Turbidity: T>1 NTU and ≤2 NTU, deduct 30 points; T>2 NTU, deduct 60 points; Residual chlorine: C < 0.2 mg / L and ≥ 0.1 mg / L, or C > 4.0 mg / L and ≤ 6.0 mg / L, deduct 30 points; C < 0.1 mg / L or C > 6.0 mg / L, deduct 60 points; pH value: 30 points deducted if P < 6.5 and ≥ 6.0, or P > 8.5 and ≤ 9.0; 60 points deducted if P < 6.0 or P > 9.0.

[0063] 3. Calculate the comprehensive evaluation score based on the weighting coefficients of each parameter.

[0064] Based on the weighting coefficients of each parameter, the comprehensive evaluation score (S) is calculated. In a more specific embodiment, it can be calculated according to the following formula: S=T_score×0.4+C_score×0.3+P_score×0.3; where T_score is the turbidity score, C_score is the residual chlorine score, and P_score is the pH score.

[0065] 4. The central controller makes decisions based on the comprehensive assessment score (S) and the water level data (H) collected by the water level sensor 211.

[0066] In a more specific embodiment, the response settings can be configured as follows: When S≥90, the water quality meets the standard, there is no need to release water, and the normal water supply status is maintained. If the water level H is less than 50% of the rated volume of the stabilizing tank, start the water replenishment process, that is, open the first isolation device 7 between the main water supply pipeline 1 and the water supply unit 2, replenish water to the stabilizing tank 21 through the main water supply pipeline 1 until H ≥ 80%, and then close the first isolation device 7. When 70≤S<90, the water quality is slightly substandard. Initiate a partial water discharge process, that is, open the electromagnetic drain valve 83 of the first drainage branch pipe 82 to discharge water until H=60%, close the electromagnetic drain valve 83, and then initiate a water replenishment process until H≥80%. When S < 70, the water quality is seriously substandard. Initiate a full water discharge process, which involves opening all electromagnetic drain valves 83 to discharge water until H = 20%, closing the electromagnetic drain valves 83, and then initiating a water replenishment process until H ≥ 80%. During the water release and replenishment process, the central controller collects data from the water quality sensor 61 and the water level sensor 211 in real time. If the water quality score (S) is ≥ 90 after replenishment, the process ends; if S is still < 90, the water release and replenishment process is repeated until the water quality meets the standards, and an update and warning message is sent to the management personnel terminal. Compared with the "drainage-type" water exchange method, this embodiment can perform a comprehensive score based on real-time water quality data (turbidity, residual chlorine, pH value), initiating partial water exchange only when the water quality is slightly substandard, and initiating full water exchange only when the water quality is severely substandard. Under the premise of ensuring continuous compliance with water quality standards and guaranteeing water safety, unnecessary water discharge is minimized, significantly saving water resources. At the same time, combined with the linkage control of the water level sensor, excessive or insufficient water replenishment is avoided, further improving the efficiency of water resource utilization.

[0067] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A water supply system for the renovation of old residential buildings, characterized in that: It includes the main water supply pipeline (1) and the water supply unit (2) that connects to the main water supply pipeline (1) and is connected to each building in the community. The water supply unit (2) includes a flow stabilizing tank (21) and a booster pump station (22) located on the ground floor of the building and connected in sequence. Its input end is connected to the main water supply pipeline (1) through a branch water supply pipeline (3), and its output end is connected to the water supply nodes of different floors of the building through a diversion pipeline (4). A pressure regulating device (5) is provided at the inlet of the water supply node.

2. The water supply system for the renovation of old residential buildings according to claim 1, characterized in that: The diversion pipeline (4) includes a riser (41), a return water pipe (42) and multiple bypasses (43). The bypasses (43) connect the riser (41) to the water supply nodes on each floor, and each water supply node corresponds to a bypass (43).

3. A water supply system for the renovation of old residential buildings according to claim 2, characterized in that: The riser (41) is equipped with a one-way valve (44) that limits the flow of water from the lower floors of the building to the upper floors.

4. A water supply system for the renovation of old residential buildings according to claim 2, characterized in that: It also includes a sensing device (6) installed on the diversion pipe (4) and configured as a set, which includes a pressure sensor and a flow meter, and a water quality sensor (61) is also installed on the return pipe (42).

5. A water supply system for the renovation of old residential buildings according to claim 4, characterized in that: It also includes a central controller that is communicatively connected to the sensing device (6), which is capable of data interaction with the terminal device through a remote communication unit.

6. A water supply system for the renovation of old residential buildings according to claim 1, characterized in that: The branch water supply pipeline (3) is provided with a first isolation device (7), which is a gate valve, a stop valve or a solenoid valve, and is configured to selectively isolate or connect the flow between the main water supply pipeline (1) and the water supply unit (2).

7. A water supply system for the renovation of old residential buildings according to claim 1, characterized in that: The pressure regulating device (5) includes a pressure reducing valve and a flow control valve connected in series. The pressure regulating device (5) is sealed to the inlet of the water supply node through a flange or quick connector and is configured to regulate the water pressure and flow rate of the water supply node.

8. A method for renovating a building water supply system in an old residential community, using the building water supply system described in claims 1-7, characterized in that... Includes the following steps: Step 1: Use ultrasonic flaw detection equipment or endoscopic imaging equipment to inspect the original pipelines in the community and classify the fatigue level of the original pipelines. Use BIM technology to construct a three-dimensional model of the pipelines of each building in the community, and determine the routing of the diversion pipelines (4), the layout of the pressure regulating equipment (5), and the layout of the sensing equipment (6). Step 2: Under the premise of ensuring the overall water supply of the community, replace the original pipelines in batches according to their fatigue level from high to low; Step 3: Install a flow stabilizing tank (21) and a booster pump station (22) in the flat area of ​​the building's ground floor, and connect them to the main water supply pipeline (1). Step 4: Construct a central controller and connect the sensing devices (6) installed in each batch to the central controller; Step 5: Close the first isolation device (7) between the water supply unit (2) and the main water supply pipeline (1), start the various equipment of the water supply unit (2) for trial operation, collect the operation data through the central controller and generate an acceptance report.

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