Dynamic sensing and monitoring method and device for building pipe network system

Abstract

This invention discloses a dynamic sensing and monitoring method and device for a building pipeline network system. The method includes the following steps: S1: establishing an equivalent model of the pipeline network; S2: determining parameter values; S3: calculating the upper pressure limit at the inlet of each water supply zone; S4: calculating the lower pressure limit; S5: establishing a rectangular coordinate system; S6: fitting a characteristic curve of the pressure value; S7: determining the operating range; S8: dynamically collecting remote pressure data and water flow data of each water supply zone and displaying the coordinate position of the collected data in a rectangular coordinate system; S9: comparing the relationship between the coordinates of each collected data and the monitoring curve to determine whether there are any abnormalities. This invention enables a very intuitive and real-time perception of the operating condition of the entire water supply network, monitoring its operating status, and timely troubleshooting of abnormalities.

Description

Technical Field

[0001] This invention relates to the field of piped drinking water technology, and in particular to a dynamic sensing and monitoring method and device for building pipe network systems. Background Technology

[0002] Currently, in the piped drinking water industry, the design phase of the pipeline system generally refers to water supply and drainage design specifications. Based on the estimated maximum flow rate and pipeline velocity limits, the pipe diameter of each section is determined. Using empirical parameters of the resistance coefficient for the corresponding pipe diameter, the flow resistance and head loss of each section are calculated. The same method is used to extrapolate data from each branch pipe to the main pipe, determine the main pipe diameter, calculate its flow resistance, and thus obtain the theoretical head loss data for the entire pipeline network path from the main pipe to the branch pipes. However, the actual construction results often deviate significantly from the theoretical calculations in the design phase. The actual pipeline route, the number of bends, elbows, joints, valves, and tees all have a significant impact on resistance loss. Furthermore, the actual flow rate may differ greatly from the design flow rate, leading to a substantial deviation of the actual hydraulic conditions from the design calculations. Currently, commissioning relies mainly on experience, using crude and simplistic methods. Generally, only the pressure value supplied by the pumps at the highest head point is adjusted, failing to grasp the dynamic pressure distribution of the entire network and the variation patterns under changing water usage conditions.

[0003] During long-term operation, pipeline systems experience pressure distribution changes due to variations in impedance characteristics. Furthermore, factors such as occupancy levels on different floors and fluctuations in the number of users in each zone also influence pressure distribution. Without quantitative monitoring methods, localized overpressure and underpressure situations may occur. Accident and fault alarms, maintenance reminders, and other functions during long-term system operation require the ability to sense and monitor the pipeline network. Only then can abnormal situations such as valve malfunctions, pipe deformation, joint valve failures, and pipe leaks be detected and addressed in real time. Summary of the Invention

[0004] The technical problem to be solved by the embodiments of the present invention is to provide a dynamic sensing and monitoring method and device for a building pipeline network system, so as to enable real-time monitoring of abnormal conditions in the pipeline network system.

[0005] To address the aforementioned technical problems, this invention proposes a dynamic sensing and monitoring method for a building pipeline system. The building pipeline system includes a water supply pump, water supply pipes, a return water pipe, and several water supply zones. The water supply pump connects to each water supply zone via the water supply pipes. A pressure sensor and a flow sensor are installed at the outlet of the water supply pump, and a remote pressure gauge is installed at the inlet of each water supply zone. The method includes:

[0006] Step S1: Establish an equivalent model of the water supply network using the water supply pipelines from the water supply pumps to the inlets of each water supply zone;

[0007] Step S2: Determine the static head H of each water supply zone in the pipeline network system. j Minimum service head H f The constant pressure value P0 of the water supply pump and the design flow rate Q s Parameter values;

[0008] Step S3: Calculate the upper pressure limit at the inlet of each water supply zone;

[0009] Step S4: Obtain the lower pressure limit value at the inlet of each water supply zone;

[0010] Step S5: Establish a rectangular coordinate system and mark the coordinate lines corresponding to each parameter;

[0011] Step S6: Based on the upper and lower pressure limits, fit the characteristic curves of the inlet pressure values ​​of each water supply zone in a rectangular coordinate system;

[0012] Step S7: Determine the operating range based on the limit values ​​of the characteristic curves. The characteristic curves within this range are the pressure monitoring curves at the inlet of each water supply zone.

[0013] Step S8: Dynamically collect remote pressure data and water flow data of each water supply zone, and display the coordinate position of the collected data in a rectangular coordinate system;

[0014] Step S9: Compare the relationship between the collected data coordinates and the monitoring curve to see if it exceeds the preset threshold. If so, it is judged as abnormal and the abnormal result is output to remind the relevant maintenance unit to check whether there are any abnormalities along the corresponding water supply pipeline.

[0015] Accordingly, this invention also provides a dynamic sensing and monitoring device for a building pipeline network system, wherein the device establishes an equivalent model of the pipeline network using the water supply pipelines from the water supply pump to the inlet of each water supply zone;

[0016] Determine the static head H of each water supply zone in the pipeline system. j Minimum service head H f The constant pressure value P0 of the water supply pump and the design flow rate Q s Parameter values;

[0017] Calculate the upper pressure limit at the inlet of each water supply zone;

[0018] Obtain the lower pressure limit at the inlet of each water supply zone;

[0019] Establish a rectangular coordinate system and mark the coordinate lines corresponding to each parameter;

[0020] The characteristic curves of the inlet pressure values ​​of each water supply zone are obtained by fitting the upper and lower pressure limits in a rectangular coordinate system.

[0021] The operating range is determined based on the limit value of the characteristic curve. The characteristic curve within this range is the monitoring curve of the pressure at the inlet of each water supply zone.

[0022] The system dynamically collects remote pressure and water flow data from each water supply zone and displays the coordinates of the collected data in a rectangular coordinate system.

[0023] The system compares the relationship between the collected data coordinates and the monitoring curve to see if it exceeds a preset threshold. If so, it is judged as abnormal and an abnormal result is output to remind the relevant maintenance unit to promptly check whether there are any abnormalities along the corresponding water supply pipeline.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. This invention establishes an equivalent model based on impedance characteristics. Once a pipeline system is commissioned and put into operation, its impedance will not change. This invention can sense and monitor changes in the impedance characteristics of the pipeline system. If changes in the impedance of certain zones are detected, it is necessary to promptly investigate whether there are abnormalities such as valve malfunction, pipeline deformation, joint and valve failure, or pipeline leakage on the corresponding pipeline path, providing real-time information for accident alarms and pipeline maintenance.

[0026] 2. In piped drinking water systems, overpressure and underpressure issues are prone to occur at the inlet pressure of different zones. This is especially true for high-lift zones without pressure-reducing valves, where pressure fluctuations are significantly influenced not only by the operating parameters of the water supply pumps but also by the pipe network impedance characteristics. This invention fully calculates the dynamic pressure distribution based on the pipe network impedance characteristics, guiding the setting and adjustment of water supply pump operating parameters. Through the analysis of monitoring curves and dynamic / static limits, it provides a quantitative basis for determining whether the zone inlet pressure meets design requirements.

[0027] 3. By deploying a small number of pressure monitoring nodes and employing specific algorithms, a visual online monitoring interface can be established, allowing for an intuitive understanding of the health status of the entire pipeline network system. The visual monitoring interface boasts excellent scalability, expanding with the number of buildings. Furthermore, this invention provides both curve and interval-level precision monitoring, enabling a combination of routine operation and periodic, refined inspection and evaluation.

[0028] 4. For ease of maintenance and to minimize impact on water quality, flow meters and other flow-through instruments should be avoided in pipeline systems. This invention only requires the deployment of wireless pressure gauges, offering high convenience and cost-effectiveness in engineering implementation. Attached Figure Description

[0029] Figure 1 This is a flowchart illustrating the dynamic sensing and monitoring method for a building management network system according to an embodiment of the present invention.

[0030] Figure 2This is a schematic diagram of the equivalent model of a building pipeline network system according to an embodiment of the present invention.

[0031] Figure 3 This is a schematic diagram illustrating the measured principle of one embodiment of the present invention.

[0032] Figure 4 This is a pipeline characteristic curve diagram of one embodiment of the present invention.

[0033] Figure 5 This is a characteristic curve of the P1 value according to an embodiment of the present invention.

[0034] Figure 6 This is a characteristic curve of the lower limit value of P1 according to an embodiment of the present invention.

[0035] Figure 7 This is a monitoring curve of the P1 value according to an embodiment of the present invention.

[0036] Figure 8 This is a characteristic curve of the pressure monitoring value P2 of the high-zone water supply according to an embodiment of the present invention.

[0037] Figure 9 This is a monitoring curve of the P2 value according to an embodiment of the present invention.

[0038] Figure 10 This is a monitoring coordinate system and monitoring curve diagram of P1 according to an embodiment of the present invention.

[0039] Figure 11 This is a monitoring coordinate system and monitoring curve diagram of P2 according to an embodiment of the present invention.

[0040] Figure 12 This is a monitoring curve of the water supply zone according to an embodiment of the present invention.

[0041] Figure 13 This is a schematic diagram of the equivalent model of a building network system according to another embodiment of the present invention.

[0042] Figure 14 This is a zone monitoring curve of normalized water supply according to another embodiment of the present invention.

[0043] Figure 15 This is a monitoring curve of independent water supply in each zone according to another embodiment of the present invention.

[0044] Explanation of icon numbers

[0045] Water supply pump 10, pressure sensor 20, flow sensor 30, remote pressure gauge 40, pressure reducing valve 50, water supply zone inlet 60. Implementation

[0046] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] In this embodiment of the invention, directional indicators (such as up, down, left, right, front, back, etc.) are only used to explain the relative positional relationship and movement of each component in a specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0048] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0049] The building's plumbing system includes water supply pumps, water supply pipes, return pipes, and several water supply zones. The water supply pumps connect to each water supply zone via the water supply pipes. Pressure and flow sensors are installed at the pump outlets, and remote pressure gauges are installed at the inlets of each water supply zone. Return pipes are equipped with return valves to control the return water flow.

[0050] Please refer to Figure 1 The dynamic sensing and monitoring method for building management network systems according to embodiments of the present invention includes:

[0051] Step S1: Establish an equivalent model of the water supply network using the water supply pipelines from the water supply pumps to the inlets of each water supply zone;

[0052] Step S2: Determine the static head H of each water supply zone in the pipeline network system. j Minimum service head H f The constant pressure value P0 of the water supply pump and the design flow rate Q s Parameter values;

[0053] Step S3: Calculate the upper pressure limit at the inlet of each water supply zone;

[0054] Step S4: Calculate the lower limit of the pressure at the inlet of each water supply zone;

[0055] Step S5: Establish a visual monitoring interface. In the visual monitoring interface, establish a rectangular coordinate system and label each parameter (static head H). j Minimum service head H f The constant pressure value P0 of the water supply pump and the design flow rate Q s The coordinate lines corresponding to the upper and lower pressure limits;

[0056] Step S6: From the characteristic curve expression of the zone inlet pressure: P 压 = P0 - ( Hj + SQ 2 According to the starting coordinates (0, H0-H), j The characteristic curves of the inlet pressure values ​​of each water supply zone are obtained by fitting the measured point coordinates (P, Qs) and the measured point coordinates (P, Qs) in a rectangular coordinate system.

[0057] Step S7: Determine the operating range based on the limit values ​​of the characteristic curves. The characteristic curves within this range are the pressure monitoring curves at the inlet of each water supply zone.

[0058] Step S8: Dynamically collect remote pressure data and water flow data of each water supply zone, and display the coordinate position of the collected data in a rectangular coordinate system;

[0059] Step S9: Compare the relationship between the collected data coordinates and the monitoring curve to see if it exceeds the preset threshold. If so, it is judged as abnormal and the abnormal result is output to remind the relevant maintenance unit to check whether there are any abnormalities along the corresponding water supply pipeline.

[0060] As one implementation method, the upper limit of the pressure at the inlet of each water supply zone is calculated according to the following formula:

[0061] P 上 =P0 - H j ;

[0062] Among them, P 上 P0 is the upper limit of the pressure at the inlet of the water supply zone, and H is the constant pressure value of the water supply pump. j The static head of the water supply zone.

[0063] As one implementation method, in step 4, the lower limit of the pressure at the inlet of each water supply zone is calculated according to the following formula:

[0064] P 下 = P0 - ( H j + SQ s 2 );

[0065] Among them, P 下 Where S is the lower limit of the pressure at the inlet of the water supply zone, S is the pipeline resistance between the inlet of the water supply zone and the water supply pump, and Q is the lower limit of the pressure at the inlet of the water supply zone. s The design flow rate for the water supply zone.

[0066] Alternatively, the lower limit value can be obtained directly through actual measurement, allowing each water supply zone to operate at its corresponding design flow rate, and the lower limit pressure value of each water supply zone can be measured. The measured lower limit value is lower than the test value when a single zone is running.

[0067] The lower limit of the pressure at the inlet of the water supply zone meets P 下 ≥H f .

[0068] In piped drinking water systems, especially large-scale water supply networks consisting of multiple buildings and zones, a small number of pressure monitoring nodes can be deployed to establish an equivalent network model based on impedance characteristics. Using the method of this invention, a visual online monitoring interface can be created, allowing for intuitive perception of the health status of the entire network system. This invention can sense and monitor changes in the impedance characteristics of the network system. If changes in the impedance of certain zones are detected, it is necessary to promptly investigate whether there are abnormalities such as valve malfunctions, pipe deformation, joint and valve failures, or pipe leaks along the corresponding pipeline path, providing real-time information for accident alarms and network maintenance. Furthermore, it provides real-time monitoring of the dynamic pressure distribution under constantly changing water usage conditions, preventing local overpressure and underpressure. This invention only requires the deployment of wireless pressure gauges, avoiding the use of cumbersome flow-through instruments, making it highly convenient and economical for engineering implementation. This invention has good scalability, is not limited by the size of the park, and provides monitoring methods with various levels of accuracy, enabling flexible applications that combine routine operation with periodic detailed assessments.

[0069] like Figure 2 This is an equivalent model of a single building's water supply network system. Pressure and flow sensors are installed at the outlet of the water supply pump in the computer room, and remote pressure gauges are installed at the inlet of each water supply zone.

[0070] The water supply pump adopts a constant pressure variable frequency operation mode, and the constant pressure value is recorded as P0.

[0071] The low-pressure zone, also known as the low-lift zone, has its inlet pressure denoted as P1. Figure 2 As shown in the diagram. A pressure-reducing valve is installed at the inlet, and the downstream pressure is set to the minimum service head for the zone.

[0072] The high-lift water supply zone, also known as the high-head zone, has its inlet pressure denoted as P2. Figure 2 As shown in the diagram. This zone may not require a pressure-reducing valve; based on design calculations, the minimum service head for this zone is provided by the residual head of the water supply pump at the zone inlet. The minimum service head is denoted as H. f .

[0073] The target pipeline network of this invention is the pipeline section from the water supply pump to the zone inlet (excluding the pressure reducing valve).

[0074] According to hydraulic principles, flow resistance is expressed as:

[0075] △P = SQ 2 ;

[0076] S is the pipeline impedance, which is related to the pipeline geometry, friction factor, and local resistance factor. When these factors are determined and remain constant, S is a constant.

[0077] The pipeline characteristic curve is as follows:

[0078] H = H j + SQ 2 ;

[0079] Among them, H j The static head is the water supply elevation difference (the elevation difference between the zone inlet and the water supply pump). H is the head required by the pipeline network.

[0080] The remaining pressure head at the partition entrance is P1.

[0081] H = H j + P1 + SQ 2 ;

[0082] P0 = H j + P1 + SQ 2 ;

[0083] P1 = P0 - (H) j + SQ 2 );

[0084] In the above formula, P0 and H j For fixed values,

[0085] When Q = 0, P1 reaches its maximum value, that is, the hydrostatic pressure is the upper limit value, specifically:

[0086] P1 = P0 - H j ;

[0087] When Q = Q s When the design flow rate is reached, P1 reaches its minimum value, which is the pressure value under the design flow rate condition, specifically:

[0088] P1 = P0 - (H) j + SQ s 2 ) .

[0089] The above defines the range of P1 under normal water supply conditions:

[0090] P0 - (H) j + SQ s 2 ) ≤ P1≤ P0 - H j .

[0091] The lower limit value under the design flow rate was obtained through actual measurement. Specifically:

[0092] With the water supply pump at constant pressure P0, open the return water valve and adjust the valve opening until the water supply flow rate equals the design flow rate.

[0093] Record the value of P1 at this time. This data is the lower limit of the inlet pressure P1 of the zone under normal water supply conditions.

[0094] Figure 3 This is an explanation of the principle behind the actual measurement.

[0095] P0 represents the constant pressure value of the water supply pump, and A represents the performance curve of the water supply pump. Curve 1 is the characteristic curve of the pipe network from the water supply pump to the zone inlet, which is also the characteristic curve of the target pipe network. Regardless of how the return water valve changes, the characteristic curve of the target pipe network remains unchanged.

[0096] The loop starts, and the corresponding flow rate is Q. X .

[0097] Gradually adjust and reduce the opening of the return water valve to gradually decrease the flow rate.

[0098] When the flow rate equals the design flow rate Q s At this point, the corresponding head is Hs. Hs is the minimum head required to maintain the elevation difference plus the pipe flow resistance. The difference between P0 and Hs is the residual head at the inlet of the zone.

[0099] At this point, record the value P1 of the pressure gauge at the zone inlet. This value of P1 is the lower limit.

[0100] Summary of pressure ranges at the entry point of each partition:

[0101] Upper limit: The hydrostatic pressure is the upper limit value;

[0102] Lower limit: Pressure value under design flow conditions.

[0103] According to the previous equation, P1 = P0 - (H) j + SQ s 2 );

[0104] The impedance value of the pipe network between the water supply pump and the inlet of the zone can be calculated:

[0105] S = (P0 - P1 - H) j ) / Q s 2 .

[0106] The method for determining the range of P2 values ​​in high-pressure water supply zones is the same as described above, but the difference lies in the fact that the pressure setting of the water supply pump uses the zone with the highest head as the target value for calculation. Therefore, for high-pressure water supply zones, pressure reducing valves are not required, but the minimum service head requirement at the zone inlet must be met. The minimum service head is marked as H. f That is, the lower limit of P2 value is greater than H. f Due to the design flow rate Q sUnder operating conditions, the measured P2 data is the lower limit of the P2 working range, which should be equal to or slightly greater than H. f If the requirements are not met, the head of the water supply pump must be increased to increase the P0 value until the requirements are met.

[0107] Pipeline characteristic curves as follows Figure 4 As shown.

[0108] The characteristic expression of the pipeline network is: H = H j + SQ 2 ;

[0109] Its characteristic curve is shown as curve 1 in the figure. A is the performance curve corresponding to the water supply pump. Q s The design flow rate used in the aforementioned actual measurement process corresponds to a head of H. s Upper limit value P0 - H j and lower limit value P0 - (H j + SQ s 2 As shown in the figure.

[0110] The quantization range of P1 value has been determined above. The characteristic curve representation of pressure monitoring point P1 is given below:

[0111] From the previous equation, P1 = P0 - (H) j + SQ 2 The quadratic parabolic curve of P1 is obtained as follows: Figure 5 As shown.

[0112] Figure 5 Curve 1 in the middle is the characteristic curve of the P1 value. Its starting point is the static water pressure at point P1, and its slope is negative. It is only related to the inherent characteristics of the pipe network, i.e., the impedance. The characteristic curve of the P1 value is a cluster of curves translated along the vertical axis. Adjust the constant pressure value P0 of the water supply pump until the starting point of the curve is equal to the static water pressure parameter given by the design. This curve is our target characteristic curve.

[0113] Compare the pipeline characteristic curves: H = H j + SQ 2 ,

[0114] visible Figure 5 Curve 1 is the vertical axis mirror image of the pipeline characteristic curve after the ordinate has been shifted.

[0115] Figure 5 This is a characteristic curve of the inlet pressure P1 in the low-pressure zone of the water supply area, where pressure reducing valves are installed. At this point, the lower limit of P1 is greater than the minimum service head H. f .like Figure 6 As shown.

[0116] The following section uses graphical methods for visual monitoring.

[0117] Pressure range at monitoring point P0 - (H) j + SQ s 2 ) < P1 < P0 - H j ;

[0118] After the limit value of the characteristic curve is determined, as shown in the shaded area in the figure, this is the monitoring curve for the P1 value. This curve segment is also a visual representation of the dynamic pressure value of the P1 monitoring point, as shown below. Figure 7 As shown.

[0119] The pressure setting of the water supply pump is based on the zone with the highest head as the target value for calculation. Therefore, for high-pressure zones, pressure reducing valves are not required, but the minimum service head requirement at the zone inlet must be met. The minimum service head is expressed in H... f Indicates. For example... Figure 2 The inlet pressure value of the high-level water supply zone is marked as P2.

[0120] The lower limit of P2 must satisfy both of the following equations:

[0121] P0 - (H) j + SQ s 2 ) < P2;

[0122] H f < P2.

[0123] The lower limit of P2 must be greater than or equal to the minimum service head. That is, it must satisfy: H0 - H s ≧ H f If this requirement is not met, the head of the water supply pump, P0, must be increased. Draw the minimum service head line, such as... Figure 8 As shown.

[0124] Figure 8 Curve 2 in the figure is the characteristic curve of the pressure monitoring value P2 of the high-level water supply.

[0125] Pressure range at monitoring point P2:

[0126] P0 - (H) j + SQ s 2 ) < P2 < P0 - H j ;

[0127] H f < P2.

[0128] After the limit value of the characteristic curve is determined, as shown in the shaded area in the figure, this is the monitoring curve for the P2 value. This curve segment is also a visual representation of the dynamic pressure value of the P2 monitoring point, as shown below. Figure 9 As shown.

[0129] The dynamic sensing and monitoring device for the building pipeline system in this embodiment of the invention establishes an equivalent model of the pipeline network using the water supply pipelines from the water supply pump to the inlet of each water supply zone.

[0130] Determine the static head H of each water supply zone in the pipeline system. j Minimum service head H f The constant pressure value P0 of the water supply pump and the design flow rate Q s Parameter values;

[0131] Calculate the upper pressure limit at the inlet of each water supply zone;

[0132] Calculate the lower pressure limit at the inlet of each water supply zone;

[0133] Establish a visual monitoring interface, create a rectangular coordinate system in the visual monitoring interface, and mark the coordinate lines corresponding to each parameter;

[0134] Based on the upper pressure limit, lower pressure limit, and characteristic curve expression, the characteristic curves of the inlet pressure values ​​of each water supply zone are fitted in a rectangular coordinate system; the characteristic curve expression is: P 压 = P0 - ( H j + SQ 2 Where Q is the flow rate at the inlet of the water supply zone, and P... 压 For the inlet pressure of the water supply zone;

[0135] The operating range is determined based on the limit value of the characteristic curve. The characteristic curve within this range is the monitoring curve of the pressure at the inlet of each water supply zone.

[0136] The system dynamically collects remote pressure and water flow data from each water supply zone and displays the coordinates of the collected data in a rectangular coordinate system.

[0137] The system compares the relationship between the collected data coordinates and the monitoring curve to see if it exceeds a preset threshold. If so, it is judged as abnormal and an abnormal result is output to remind the relevant maintenance unit to promptly check whether there are any abnormalities along the corresponding water supply pipeline.

[0138] As one implementation method, the device calculates the upper pressure limit at the inlet of each water supply zone according to the following formula:

[0139] P 上 =P0 - H j ;

[0140] Among them, P 上P0 is the upper limit of the pressure at the inlet of the water supply zone, and H is the constant pressure value of the water supply pump. j The static head of the water supply zone.

[0141] As one implementation method, the device calculates the lower pressure limit at the inlet of each water supply zone according to the following formula:

[0142] P 下 = P0 - ( H j + SQ s 2 );

[0143] Among them, P 下 Where S is the lower limit of the pressure at the inlet of the water supply zone, S is the pipeline resistance between the inlet of the water supply zone and the water supply pump, and Q is the lower limit of the pressure at the inlet of the water supply zone. s The design flow rate for the water supply zone.

[0144] As one implementation method, the lower limit of the pressure at the inlet of the water supply zone satisfies P. 下 ≥H f .

[0145] Engineering Application Example 1:

[0146] Figure 2 In the low-pressure water supply zone, a pressure reducing valve must be installed. The real-time pressure sampling value at the zone inlet is P1. The monitoring coordinate system and monitoring curve are as follows: Figure 10 .

[0147] Figure 10 Point O in the middle represents the location of a certain sampling data point, with coordinates O(P1, Q). i P1 is the real-time pressure value, Q i This represents the real-time flow rate. Point O in the graph (P1, Q) represents this flow rate. i ( ) represents the coordinates of the monitoring points. A series of real-time sampling data are depicted in the monitoring coordinate system in the form of coordinate points, and the points should be distributed roughly along the monitoring curve.

[0148] If the actual landing point clearly does not conform to the distribution of the monitoring curve, or even jumps out of the limit area (shaded area in the figure), it indicates that the pipeline impedance has changed significantly. The reasons for this change may be: valve malfunction along the pipeline, joint and valve failure, pipeline leakage, etc. This method serves as a fault alarm and maintenance warning.

[0149] This invention provides a very intuitive way to perceive the health status of the pipeline network and achieve the goal of visual dynamic monitoring.

[0150] Figure 2 In the high-pressure water supply zone, no pressure reducing valve is installed. The real-time pressure sampling value at the zone inlet is P2. The monitoring coordinate system and monitoring curve are as follows: Figure 11 .

[0151] Figure 11 Point O in the middle represents the location of a certain sampling data point, with coordinates O(P2, Q). i P2 is the real-time pressure value, Q i This represents the real-time flow rate. Point O in the graph (P2, Q) i ( ) represents the coordinates of the monitoring points. A series of real-time sampling data are depicted in the monitoring coordinate system in the form of coordinate points, and the points should be distributed roughly along the monitoring curve.

[0152] If the actual landing point clearly does not conform to the distribution of the monitoring curve, or even jumps out of the limit area (shaded area in the figure), it indicates that the pipeline impedance has changed significantly. The reasons for this change may be: valve malfunction along the pipeline, joint and valve failure, pipeline leakage, etc. This method serves as a fault alarm and maintenance warning.

[0153] The embodiments of the present invention provide a very intuitive way to perceive the health status of the pipeline network and achieve the purpose of visual dynamic monitoring.

[0154] As one implementation method, Figure 2 The system's high and low water supply zones are simultaneously displayed in a single monitoring coordinate system, enabling a more intuitive visualization and perception of the entire system. Figure 12 As shown.

[0155] Figure 12 In the text, subscript 1 indicates low-area monitoring, and subscript 2 indicates high-area monitoring.

[0156] For maintenance and water quality safety reasons, no flow meter is installed at the inlet of the zone. Q i While it's impossible to distinguish the actual flow rates Q1 and Q2 of each zone, the range of inlet pressure monitoring values ​​should conform to the following rule: The determination of the lower limit values ​​for each high and low zone requires testing under design flow conditions for all zones. If the flow rate of an individual zone does not reach the design flow rate, it will lead to a lower flow rate in the main water supply pipe, lower resistance loss, and consequently, a higher measured lower limit pressure value at the zone inlet. In the diagram, coordinate point O1 (P1, Q2) i ) and O2 (P2, Q i ) for the total flow Q i The system tracks high and low pressure samples at all times. By monitoring whether the pressure readings fall within the specified limits, the system can detect the pipeline network status and provide emergency alarms and maintenance reminders.

[0157] As one implementation method, the method of this invention can be directly extended and applied to the piped drinking water systems in multiple buildings and multiple high and low zones within the park.

[0158] Figure 13For the direct drinking water network topology of multiple buildings with multiple high and low water supply zones, an equivalent network model is established based on the water supply system.

[0159] Each zone has its own pipeline characteristic curve. Remote pressure gauges are installed at the inlet of all zones to calculate the upper and lower limits of their respective pressure monitoring points and plot their monitoring curves.

[0160] The determination of the lower limit value for each zone requires testing under the design flow operating conditions for all zones. If the flow rate of individual zones does not reach the design flow rate, it will result in a lower flow rate in the water supply main and a lower resistance loss, which in turn will lead to a higher measured value of the lower pressure limit at the zone inlet.

[0161] like Figure 14 First, establish the monitoring coordinate system for each building, and determine the limits and monitoring curves. Following the aforementioned method, Figure 13 The example requires establishing two monitoring coordinate systems and four zone monitoring curves. Then, the monitoring coordinate systems for each building are stretched along the horizontal axis, H... f To establish a constant value, the horizontal axis spans two coordinate systems. The real-time display shows the water supply flow rate Q. i The sampling coordinates of each pressure monitoring point at any given time, such as Figure 14 Points O1, O2, O3, and O4 are used to determine whether their coverage areas are normal, thereby achieving the purpose of pipeline network sensing and visual monitoring of pipeline network status. Here, Q... i This is the total flow rate of the water supply pump. Since there are no flow meters on the water supply pipeline, it is impossible to distinguish the actual flow rate of each zone. Therefore, when all zones are running normally, the interval monitoring method is adopted.

[0162] This diagram also clearly shows the distribution of elevation differences between different areas of each building. The higher the head of the area, the lower the monitoring area is on the diagram; the lower the head of the area, the higher the monitoring area is on the diagram. Figure 13 As shown, the head of the pressure monitoring points at the inlet of the two zones in Building 2 is lower than that of the two zones in Building 1, therefore... Figure 14 The monitoring areas of points O3 and O4 shown above are both higher than those of points O1 and O2.

[0163] Other buildings can Figure 14 Expanding horizontally based on this foundation.

[0164] The above engineering examples have achieved the goal of dynamic perception and visual monitoring of building pipeline networks.

[0165] It needs to be further explained that, Figure 10 , Figure 11 This illustrates an engineering example of dynamic monitoring in a single water supply zone. Figure 12 , Figure 14This illustrates an engineering example of dynamic monitoring of multiple water supply zones and buildings. The former monitors with precision down to the monitoring curve, while the latter monitors with precision down to the monitoring interval. The two are used in combination: the latter is suitable for routine daily operation, while the former is suitable for periodic, detailed testing and health assessment of each zone.

[0166] Examples of refined monitoring projects running independently in each partition are as follows. Similarly, using... Figure 14 The monitoring coordinate interface shown allows a specific zone to operate with water supply only, while other zones are shut down. The coordinate points and their reference relationship to the monitoring curve are displayed as described above. The water supply flow rate Q is shown at this time. i This is the actual flow value for a single partition. All partitions are processed sequentially in this manner to obtain the health status of the network, such as... Figure 15 As shown.

[0167] This invention can sense and monitor changes in the impedance characteristics of a pipeline network system. If changes in the impedance of certain zones are detected, it is necessary to promptly investigate whether there are any abnormalities such as valve malfunctions, pipeline deformation, joint and valve failures, or pipeline leaks along the corresponding pipeline path, providing real-time information for accident alarms and pipeline maintenance. Furthermore, it monitors the pressure distribution under constantly changing water usage conditions in real time, preventing localized overpressure and underpressure. This invention only requires the deployment of wireless pressure gauges, avoiding the use of cumbersome flow-through instruments, making it highly convenient and economical for engineering implementation. This invention has good scalability, is not limited by the size of the industrial park, and provides monitoring methods with various levels of accuracy, enabling flexible applications that combine routine operation with periodic detailed evaluation.

[0168] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dynamic sensing and monitoring method for a building pipe network system, the building pipe network system comprising a water supply pump, a water supply pipe, a return pipe and a plurality of water supply zones, the water supply pump being connected to each water supply zone through the water supply pipe, a pressure sensor and a flow sensor being arranged at an outlet of the water supply pump, and a remote pressure gauge being arranged at an inlet of each water supply zone, characterized in that, The method comprises: Step S1: establishing a pipe network equivalent model for water supply pipes from water supply pumps to entrances of each water supply subarea; Step S2: determining the static head H of each water supply subarea of the pipe network system j , the minimum service water head H f , the constant pressure value P0 of the water supply pump, and the design flow Q s . Step S3: calculating an upper limit value of pressure at the entrance of each water supply subarea; Step S4: obtaining a lower limit value of pressure at the entrance of each water supply subarea; Step S5: establishing a rectangular coordinate system and marking coordinate lines corresponding to each parameter; Step S6: fitting a characteristic curve of the pressure value at the entrance of each water supply subarea in the rectangular coordinate system according to the upper limit value and the lower limit value of pressure; Step S7: determining a running range falling area according to the limit value of the characteristic curve, and the characteristic curve in the range is the monitoring curve of the pressure at the entrance of each water supply subarea; Step S8: dynamically collecting remote pressure data and water supply flow data of each water supply subarea, and displaying coordinate positions of the collected data in the rectangular coordinate system; Step S9: comparing whether the relationship between each data coordinate and the monitoring curve exceeds a preset threshold value, if yes, judging as abnormal, and outputting an abnormal result to remind a relevant maintenance unit to timely investigate whether there is an abnormal condition along the water supply pipe; In step 3, the upper limit value of pressure at the entrance of each water supply subarea is calculated according to the following formula: P 上 =P0 - H j ; Among them, P 上 P0 is the upper limit of the pressure at the inlet of the water supply zone, and H is the constant pressure value of the water supply pump. j The static head of the water supply zone; In step 4, the lower limit value of pressure at the entrance of each water supply subarea is calculated according to the following formula: P 下 = P0 - ( H j + SQ s 2 ); where P 下 is the lower limit of the pressure at the inlet of the water supply zone, S is the resistance of the pipe between the inlet of the water supply zone and the water supply pump, Q s is the design flow of the water supply zone.

2. The method of claim 1, wherein the method further comprises: The lower limit value of the pressure at the inlet of the water supply district satisfies P 下 ≥ H f .

3. The method of claim 1, wherein the method further comprises: The characteristic curve expression of the water supply district inlet pressure is: P 压 = P0- ( H j + SQ 2 ) where Q is the flow rate at the water distribution zone inlet and P is the pressure at the water distribution zone inlet. 压 where Q is the flow rate at the water distribution zone inlet and P is the pressure at the water distribution zone inlet.

4. The method of claim 1, wherein the method further comprises: In step 4, the lower limit value of pressure of each water supply subarea is measured under the condition that each water supply subarea runs at a design flow corresponding to each subarea.

5. A dynamic sensing monitoring device for a building pipe network system, characterized in that, The device establishes a pipe network equivalent model for water supply pipes from water supply pumps to entrances of each water supply subarea; determining the static head H of each water supply subarea of the pipe network system j , the minimum service water head H f , the constant pressure value P0 of the water supply pump, and the design flow Q s of the water supply pump The upper limit value of pressure at the entrance of each water supply subarea is calculated; The lower limit value of pressure at the entrance of each water supply subarea is obtained; A rectangular coordinate system is established, and coordinate lines corresponding to each parameter are marked; A characteristic curve of the pressure value at the entrance of each water supply subarea is fitted in the rectangular coordinate system according to the upper limit value and the lower limit value of pressure; A running range falling area is determined according to the limit value of the characteristic curve, and the characteristic curve in the range is the monitoring curve of the pressure at the entrance of each water supply subarea; Remote pressure data and water supply flow data of each water supply subarea are dynamically collected, and coordinate positions of the collected data are displayed in the rectangular coordinate system; Whether the relationship between each data coordinate and the monitoring curve exceeds a preset threshold value is compared, if yes, judging as abnormal, and outputting an abnormal result to remind a relevant maintenance unit to timely investigate whether there is an abnormal condition along the water supply pipe; The device calculates the upper limit value of pressure at the entrance of each water supply subarea according to the following formula: P 上 =P0 - H j ; Among them, P 上 P0 is the upper limit of the pressure at the inlet of the water supply zone, and H is the constant pressure value of the water supply pump. j The static head of the water supply zone; The device calculates the lower limit value of pressure at the entrance of each water supply subarea according to the following formula: P 下 = P0 - ( H j + SQ s 2 ); where P 下 is the lower limit of the pressure at the inlet of the water supply zone, S is the resistance of the pipe between the inlet of the water supply zone and the water supply pump, Q s is the design flow of the water supply zone.

6. The dynamic sensing monitoring device for building piping network system according to claim 5, wherein, The lower limit value of the pressure at the inlet of the water supply district satisfies P 下 ≥ H f .

7. The dynamic sensing monitoring device for building piping system according to claim 5, wherein, The characteristic curve expression of the water supply district inlet pressure is: P 压 = P0- ( H j + SQ 2 ) where Q is the flow rate at the water distribution zone inlet and P is the pressure at the water distribution zone inlet. 压 where Q is the flow rate at the water distribution zone inlet and P is the pressure at the water distribution zone inlet.

8. The dynamic sensing monitoring device for building piping system according to claim 5, wherein, The lower limit value of pressure of each water supply subarea is measured under the condition that each water supply subarea runs at a design flow corresponding to each subarea.

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