Peak flow alarm and shutdown protection system for secondary supply pump house

Abstract

The invention discloses a peak flow alarm and shutdown protection system for a secondary supply pump room, relates to the technical field of pump room flow early warning, and solves the technical problems of analyzing real-time flow data of the pump room, accurately early warning faults such as water leakage and pipe explosion in advance, quickly positioning the faults and improving the maintenance efficiency. According to the method, the unit maximum water outlet flow and the real-time water outlet flow of the pump room are obtained, the first flow threshold value and the second flow threshold value are calculated in combination with the water outlet proportionality coefficient set by an operator, the real-time flow and the threshold values are compared for multiple rounds, signals of delay control, water leakage early warning, pipe explosion early warning and the like can be accurately sent out in a staged mode, and the control accuracy is improved. And the system can accurately calculate the pipe explosion distance according to the time difference and the propagation speed of the pressure waves reaching different sensors, so that the pipe explosion position can be positioned, the subsequent maintenance time is shortened, and the loss is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of pump house flow early warning, specifically a peak flow alarm and shutdown protection system for the secondary water supply pump house. Background Technique

[0002] The water supply system of high-rise residential buildings is divided into high-zone water supply and low-zone water supply according to vertical zoning. The low-zone water supply is generally supplied by the municipal water supply network, and the high-zone is supplied by secondary pressurization equipment, that is, the daily water use of residents in high-rise residential buildings is ensured through the secondary water supply pump house.

[0003] The pressurization equipment is generally variable-frequency constant-pressure water supply. When the external courtyard water supply network is damaged naturally due to aging or the foundation sinks and other factors, a pipe burst may occur.

[0004] In the prior art, when a pipe burst occurs, the water pressure drops and the water output increases. The pressurization system cannot determine whether it is a pipe burst or a peak water use period. It often first increases the pump frequency, but the water pressure still continues to drop and the water consumption continues to increase. At this time, the pressurization system increases the pump water supply until it finally shuts down, that is, after all the main pumps in the entire pressurized area are fully loaded and the set pressure cannot be reached, the shutdown protection will be carried out.

[0005] When a pipe burst occurs, the water pressure drops and the water output increases, resulting in an increase in the leakage volume. If it is not discovered in time, the basement may be flooded, electrical equipment in the community may be flooded, especially the elevator may be flooded, causing economic losses. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the present invention provides a peak flow alarm and shutdown protection system for the secondary water supply pump house, which solves the problems of analyzing the real-time flow data of the pump house, warning of faults such as water leakage and pipe burst in advance and accurately, quickly locating the fault, and improving the maintenance efficiency.

[0007] To achieve the above objectives, the present invention is realized through the following technical solutions: A peak flow alarm and shutdown protection system for the secondary water supply pump house, including:

[0008] A flow comparison and analysis unit, which is used to calculate the maximum flow per unit time according to the pump house information transmitted by the pump house information acquisition unit, determine the first flow threshold, compare the real-time water output flow with the first flow threshold, generate a delay control or normal monitoring signal, set a delay time for the delay control signal, and then obtain the real-time water output flow and compare it with the first flow threshold again to generate a water leakage warning or normal monitoring signal. If it is a water leakage warning signal, it is transmitted to the shutdown warning analysis unit;

[0009] The shutdown warning analysis unit is used to obtain the real-time water discharge flow based on the water leakage warning signal, calculate the second flow threshold, compare the real-time water discharge flow with the second flow threshold, generate a secondary delay control or normal monitoring signal, set a delay time for the secondary delay control signal, obtain the real-time water discharge flow again and compare it with the second flow threshold, generate a burst pipe warning or normal monitoring signal, and if it is a burst pipe warning signal, transmit it to the burst pipe location analysis unit;

[0010] The burst pipe location analysis unit is used to analyze the burst pipe warning signal, determine the abnormal water supply pipe, calculate the pressure wave propagation speed according to the data of pressure sensors at different positions, and then calculate the burst pipe distance to generate the burst pipe location information and transmit it to the management information output unit.

[0011] As a further solution of the present invention, it further includes a pump house information acquisition unit for transmitting the acquired pump house information to the flow comparison analysis unit, and the pump house information includes the pressurized area information, the flow sensor data, and the flow threshold;

[0012] The management information output unit is used to display the acquired normal monitoring signal, water leakage warning signal, burst pipe warning signal, and burst pipe location information to the corresponding operators.

[0013] As a further solution of the present invention, the specific manner in which the flow comparison analysis unit generates a delay control or normal monitoring signal is as follows:

[0014] Obtain the maximum unit water discharge of the pump house within time t, calculate the average value q of the maximum unit flow during this period, obtain the real-time water discharge flow Q1 of the pump house and the water discharge ratio coefficient k1, and calculate the first flow threshold Y1 = q×k1;

[0015] Compare the real-time water discharge flow Q1 with the first flow threshold Y1. If Q1>Y1, generate a delay control signal;

[0016] If Q1≤Y1, generate a normal monitoring signal and analyze the delay control signal.

[0017] As a further solution of the present invention, the specific manner in which the flow comparison analysis unit generates a water leakage warning or normal monitoring signal is as follows:

[0018] Carry out delay control according to the delay control signal, set the delay time t1, obtain the real-time water discharge flow Q1' after the delay time t1, compare it with the first flow threshold Y1. If the real-time water discharge flow Q1' > Y1, generate a water leakage warning signal and transmit it to the shutdown warning analysis unit;

[0019] If the real-time water discharge flow Q1'≤Y1, generate a normal monitoring signal and transmit it to the management information output unit.

[0020] As a further solution of the present invention, the specific way for the shutdown warning analysis unit to generate a secondary delay control or normal monitoring signal is as follows:

[0021] Obtain the real-time water outlet flow rate Q2 and the water outlet proportionality coefficient k2, combine with the average value q of the maximum flow rate per unit, calculate the second flow threshold Y2 = q×k2, compare Q2 with Y2, if Q2 > Y2, generate a secondary delay control signal and analyze it;

[0022] If Q2 ≤ Y2, generate a normal monitoring signal and transmit it to the management information output unit.

[0023] As a further solution of the present invention, the specific way for the shutdown warning analysis unit to generate a burst pipe warning or normal monitoring signal is as follows:

[0024] Set a delay time t2, obtain the real-time water outlet flow rate Q2' after time t2, compare it with the second flow threshold Y2, if the real-time water outlet flow rate Q2' > Y2, generate a burst pipe warning signal, if the real-time water outlet flow rate Q2' ≤ Y2, generate a normal monitoring signal.

[0025] As a further solution of the present invention, the specific way for the burst pipe location analysis unit to generate burst pipe location information is as follows:

[0026] Obtain the corresponding pressurization area at that time, then obtain the abnormal water supply pipe corresponding to the pressurization area, and obtain all the pressure sensors on the abnormal water pipe. Then obtain the time when the pressure sensor obtains the pressure wave, and at the same time obtain the propagation speed v of the pressure wave in the pipeline;

[0027] At the same time, according to the formula Calculate the burst pipe distance x, where r1 is the acquisition time of sensor A and r2 is the acquisition time of sensor B, and generate burst pipe location information according to the burst pipe distance x, and then transmit it to the management information output unit.

[0028] As a further solution of the present invention, the specific way for the burst pipe location analysis unit to obtain the propagation speed is as follows:

[0029] Obtain all the pressure sensors and label them as a, and a = 1, 2,..., b, where b represents the label of the pressure sensor. At the same time, obtain the distance D between adjacent pressure sensors, obtain the time when the pressure wave reaches the sensor corresponding to a, and calculate the time difference Δt between adjacent pressure sensors. Then according to the formula Calculate the propagation speed v between adjacent pressure sensors (a，a+1) , and so on to calculate all the adjacent propagation speeds, and calculate the average value of all the adjacent propagation speeds, and take the obtained average value as the standard propagation speed v.

[0030] The present invention provides a peak flow alarm and shutdown protection system for the secondary water supply pump house. Compared with the prior art, it has the following beneficial effects:

[0031] By obtaining the maximum unit water output flow and real-time water output flow of the pump house, and combining with the water output ratio coefficient set by the operator, the present invention calculates the first and second flow thresholds. By comparing the real-time flow with the thresholds in multiple rounds, it can accurately send signals such as delayed control, leakage warning, and pipe burst warning in stages, improving the accuracy and timeliness of fault warning.

[0032] The present invention obtains the data of the pressure sensor through the pipe burst positioning analysis unit, calculates the propagation speed of the pressure wave between adjacent sensors, and takes the average value as the standard propagation speed, improving the accuracy of the propagation speed calculation. According to the time difference of the pressure wave reaching different sensors and the propagation speed, the system can accurately calculate the pipe burst distance, thereby realizing the positioning of the pipe burst position, shortening the subsequent maintenance time, and reducing losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is the system principle block diagram of the present invention;

[0034] Figure 2 is the flow protection flow chart of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] Embodiment 1

[0037] Please refer to Figure 1 and Figure 2 , the present application provides a peak flow alarm and shutdown protection system for the secondary water supply pump house, including a pump house information acquisition unit, a flow comparison and analysis unit, a shutdown warning analysis unit, a pipe burst positioning analysis unit, and a management information output unit, and it can be known in combination with Figure 1 that the above functional units are unidirectionally electrically connected.

[0038] The pump house information acquisition unit is used to acquire pump house information, and the pump house information includes pressurized area information, flow sensor data, and flow thresholds, and at the same time transmits the acquired pump house information to the flow comparison and analysis unit.

[0039] Flow comparison analysis unit, which is used to perform early warning processing on the overall status of the pump house according to the obtained pump house information, and the specific early warning processing method is as follows:

[0040] Obtain the unit maximum water output flow rate corresponding to the pump house within the time t, and the value of the time t is set by the operator. The value range here can be set from 7 to 10 days. Calculate the average value of the unit maximum flow rate corresponding to the time t and record it as q. At the same time, obtain the real-time water output flow rate Q1 of the pump house. Then obtain the water output ratio coefficient k1, and k1 is generally set from 1.2 to 1.5. The specific value is set by the operator. Calculate the product of the average value of the unit maximum flow rate q and the water output ratio coefficient k1 to obtain the first flow threshold Y1, and compare the real-time water output flow rate Q1 with the first flow threshold Y1;

[0041] If the real-time water output flow rate Q1 is greater than the first flow threshold Y1, generate a delay control signal. If the real-time water output flow rate Q1 is less than the first flow threshold Y1, generate a normal monitoring signal, and at the same time analyze the generated delay control signal;

[0042] Perform delay control according to the generated delay control signal, and set the delay time t1. And t1 is generally set from 30s to 120s. The specific value is set by the operator. At the same time, obtain the real-time water output flow rate recorded as Q1′ corresponding to the delay time t1, and compare it with the first flow threshold Y1. If the real-time water output flow rate Q1′ is greater than the first flow threshold Y1, generate a leakage warning signal. If the real-time water output flow rate Q1′ is less than the first flow threshold Y1, generate a normal monitoring signal, and at the same time transmit the leakage warning signal to the shutdown warning analysis unit and transmit the normal monitoring signal to the management information output unit.

[0043] Shutdown warning analysis unit, which is used to analyze the obtained leakage warning signal. Based on the leakage warning signal, obtain the real-time water output flow rate recorded as Q2, and obtain the water output ratio coefficient k2 at this time, and calculate the product of it and the average value of the unit maximum flow rate q to obtain the second flow threshold Y2. At the same time, compare the real-time water output flow rate Q2 with the second flow threshold Y2;

[0044] If the real-time water output flow rate Q2 is greater than the second flow threshold Y2, generate a secondary delay control signal and analyze it. On the contrary, if the real-time water output flow rate Q2 is less than the second flow threshold Y2, generate a normal monitoring signal and transmit it to the management information output unit. And the normal monitoring signal here may indicate that it is the peak water consumption period currently, resulting in an increase in the water output flow rate.

[0045] Analyze the generated secondary delay control signal, set the delay time t2, and the value of t2 is generally 60s to 120s, and the specific value is set by the operator. At the same time, after obtaining the delay time t2, record the corresponding real-time water output flow as Q2′, and compare it with the second flow threshold Y2. If the real-time water output flow Q2′ is greater than the second flow threshold Y2, generate a burst pipe warning signal; otherwise, if the real-time water output flow Q2′ is less than the second flow threshold Y2, generate a normal monitoring signal.

[0046] For the generated burst pipe warning signal, generate a corresponding shutdown instruction and transmit it to the management information output unit. Through the management information output unit, transmit the shutdown instruction to the pressurization area control cabinet for shutdown control.

[0047] Embodiment 2

[0048] As Embodiment 2 of the present invention, it is implemented on the basis of Embodiment 1, and the difference from Embodiment 1 is as follows:

[0049] The shutdown warning analysis unit transmits the generated burst pipe warning signal to the burst pipe location analysis unit and locates the burst pipe position.

[0050] The burst pipe location analysis unit is used to obtain the burst pipe warning signal, and at the same time obtain the corresponding pressurization area, then obtain the abnormal water supply pipe corresponding to the pressurization area, and here the abnormal water supply pipe refers to the water supply pipe that generates the burst pipe warning signal, and obtain all the pressure sensors on the abnormal water pipe, then obtain the time when the pressure sensor obtains the pressure wave, and at the same time obtain the propagation speed v of the pressure wave in the pipeline. The specific acquisition method is as follows:

[0051] Obtain all the pressure sensors and label them as a, and a = 1, 2,..., b, where b represents the label of the pressure sensor. At the same time, obtain the distance D between adjacent pressure sensors, obtain the time when the pressure wave reaches the sensor corresponding to a, and calculate the time difference Δt between adjacent pressure sensors. Then, according to the formula Calculate the propagation speed v between adjacent pressure sensors (a，a+1) , and so on to calculate all the adjacent propagation speeds, and calculate the average value of all the adjacent propagation speeds, and take the obtained average value as the standard propagation speed v;

[0052] At the same time, according to the formula Calculate the burst pipe distance x, where r1 is the acquisition time of sensor A and r2 is the acquisition time of sensor B, and generate burst pipe position information according to the burst pipe distance x, and then transmit it to the management information output unit.

[0053] The management information output unit is used to display the obtained burst pipe position information to the corresponding operator.

[0054] Embodiment III

[0055] As Embodiment III of the present invention, the key lies in combining the implementation processes of Embodiment I and Embodiment II for implementation.

[0056] For some data in the above formula, only their numerical values are taken for calculation, and parameter units are not substituted for calculation. At the same time, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0057] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical method of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical method of the present invention.

Claims

1. The peak flow alarm and shutdown protection system for the secondary water supply pump house is characterized in that Including: A flow comparison and analysis unit, which is used to calculate the maximum flow rate per unit time according to the pump house information transmitted by the pump house information acquisition unit, determine the first flow threshold, compare the real-time water discharge flow rate with the first flow threshold, generate a delay control or normal monitoring signal, set a delay time for the delay control signal, obtain the real-time water discharge flow rate again and compare it with the first flow threshold, generate a leakage warning or normal monitoring signal, and if it is a leakage warning signal, transmit it to the shutdown warning analysis unit; A shutdown warning analysis unit, which is used to obtain the real-time water discharge flow rate based on the leakage warning signal, calculate the second flow threshold, compare the real-time water discharge flow rate with the second flow threshold, generate a secondary delay control or normal monitoring signal, set a delay time for the secondary delay control signal, obtain the real-time water discharge flow rate again and compare it with the second flow threshold, generate a pipe burst warning or normal monitoring signal, and if it is a pipe burst warning signal, transmit it to the pipe burst location analysis unit; A pipe burst location analysis unit, which is used to analyze the pipe burst warning signal, determine the abnormal water supply pipe, calculate the pressure wave propagation speed according to the data of pressure sensors at different positions, and then calculate the pipe burst distance, generate the pipe burst location information, and transmit it to the management information output unit.

2. The peak flow alarm and shutdown protection system for the two-feed pump house according to claim 1, characterized in that, It also includes a pump house information acquisition unit, which is used to transmit the acquired pump house information to the flow comparison and analysis unit, and the pump house information includes the pressurized area information, flow sensor data, and flow threshold; A management information output unit, which is used to display the acquired normal monitoring signal, leakage warning signal, pipe burst warning signal, and pipe burst location information to the corresponding operators.

3. The peak flow alarm and shutdown protection system for the two-supply pump house according to claim 1, characterized in that, The specific method for the flow comparison and analysis unit to generate a delay control or normal monitoring signal is as follows: Obtain the maximum water discharge flow rate per unit of the pump house within time t, calculate the average value q of the maximum flow rate per unit of this period, obtain the real-time water discharge flow rate Q1 of the pump house and the water discharge ratio coefficient k1, and calculate the first flow threshold Y1 = q × k1; Compare the real-time water discharge flow rate Q1 with the first flow threshold Y1. If Q1 > Y1, generate a delay control signal; If Q1 ≤ Y1, generate a normal monitoring signal and analyze the delay control signal.

4. The peak flow alarm and shutdown protection system for the two-feed pump house according to claim 1, characterized in that The specific method for the flow comparison and analysis unit to generate a leakage warning or normal monitoring signal is as follows: Carry out delay control according to the delay control signal, set a delay time t1, obtain the real-time water discharge flow rate Q1' after the delay time t1, compare it with the first flow threshold Y1. If the real-time water discharge flow rate Q1' > Y1, generate a leakage warning signal and transmit it to the shutdown warning analysis unit; If the real-time water discharge flow rate Q1' ≤ Y1, generate a normal monitoring signal and transmit it to the management information output unit.

5. The peak flow alarm and shutdown protection system for the dual water supply pump house according to claim 1, wherein The specific method for the shutdown warning analysis unit to generate a secondary delay control or normal monitoring signal is as follows: Obtain the real-time water discharge flow rate Q2, the water discharge ratio coefficient k2, combine the average value q of the maximum flow rate per unit, calculate the second flow threshold Y2 = q × k2, compare Q2 with Y2. If Q2 > Y2, generate a secondary delay control signal and analyze it; If Q2 ≤ Y2, generate a normal monitoring signal and transmit it to the management information output unit.

6. The peak flow alarm and shutdown protection system for the dual water supply pump house according to claim 1, characterized in that, The specific method for the shutdown warning analysis unit to generate a pipe burst warning or normal monitoring signal is as follows: Set a delay time t2, obtain the real-time water outlet flow rate Q2' after time t2, and compare it with the second flow rate threshold Y2. If the real-time water outlet flow rate Q2' > Y2, generate a burst pipe warning signal. If the real-time water outlet flow rate Q2' ≤ Y2, generate a normal monitoring signal.

7. The peak flow alarm and shutdown protection system for the two-supply pump house according to claim 1, characterized in that, The specific method for the burst pipe location analysis unit to generate burst pipe location information is as follows: Obtain the corresponding pressurized area at that time, then obtain the abnormal water supply pipe corresponding to the pressurized area, and obtain all the pressure sensors on the abnormal water pipe. Then obtain the time when the pressure sensor obtains the pressure wave, and at the same time obtain the propagation speed v of the pressure wave in the pipeline; Meanwhile, according to the formula the burst pipe distance x is calculated, where r1 is the acquisition time of sensor A, r2 is the acquisition time of sensor B, and the burst pipe position information is generated based on the burst pipe distance x and then transmitted to the management information output unit.

8. The peak flow alarm and shutdown protection system for the two-feed pump house according to claim 7, characterized in that, The specific method for the burst pipe location analysis unit to obtain the propagation speed is as follows: Obtain all the pressure sensors and label them as a, where a = 1, 2, …, b, and b represents the label of the pressure sensor. At the same time, obtain the distance between adjacent pressure sensors and denote it as D. Obtain the time when the pressure wave arrives at the sensor corresponding to a, and calculate the time difference Δt between adjacent pressure sensors. Then, according to the formula calculate the propagation speed v between adjacent pressure sensors (a，a+1) , and so on to calculate all the adjacent propagation speeds, and calculate the mean value of all the adjacent propagation speeds. Take the obtained mean value as the standard propagation speed v.

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