CN113157007A - Intelligent shutoff method for abnormal flow of liquid pipeline - Google Patents
Intelligent shutoff method for abnormal flow of liquid pipeline Download PDFInfo
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- CN113157007A CN113157007A CN202110289037.0A CN202110289037A CN113157007A CN 113157007 A CN113157007 A CN 113157007A CN 202110289037 A CN202110289037 A CN 202110289037A CN 113157007 A CN113157007 A CN 113157007A
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- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
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- G05D7/06—Control of flow characterised by the use of electric means
- G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
- G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
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Abstract
The invention discloses an intelligent shutoff method for abnormal flow of a liquid pipeline, which is characterized in that a plurality of stages of abnormal flow detection control assemblies are arranged on the same water pipeline of a large user or an urban water supply ring network and an inlet and outlet water branch in a segmented manner, and each stage of abnormal flow detection control assembly comprises a sensor assembly, an electric control valve, a power supply and a setting judgment module; each sensor component feeds back water flow and water pressure signals in the water pipeline interval to a setting judgment module, and the setting judgment module compares, analyzes and judges the detected water flow value and the received signal duration with the set water flow, the set time fixed value and the water flow minimum detection value; when the set water quantity is reached or the set time constant value is exceeded, the setting judgment module controls the electric control valve to be closed; and when the minimum water detection value is reached and the setting time fixed value is reached, the setting judgment module controls the electric control valve to be closed. The invention can realize the sectional pipeline detection and ensure that a user or a worker can quickly determine the water leakage and running interval.
Description
Technical Field
The invention relates to the technical field of water saving, in particular to an intelligent shutoff method for abnormal flow of a liquid pipeline.
Background
At present, in cities and towns with better economic development, the main flow water meter is an intelligent remote water meter which is provided with an electric control valve and is not provided with the electric control valve. Many manufacturers, many product types and different functions. The present intelligent remote water meter is mainly characterized by that it utilizes modern microelectronic technique, modern sensor technique and intelligent IC card technique to measure and charge water consumption, and can implement flow control, such as IC card intelligent water meter. Regarding the valve control function, it is mainly used to prevent malicious defaulting of water charges.
However, the existing intelligent remote water meter has some defects, which are:
1) the water supply enterprises do not have the function of actively realizing the protection of abnormal pipeline flow based on the electric control valve, users and workers cannot find the problem of abnormal liquid pipeline flow in time, the phenomenon of leakage of water flow caused by leakage cannot be reduced, and waste and secondary harm of water resources are caused by water leakage, for example, the upper floor and the lower floor are soaked, a cable trench and an equipment room are soaked, so that the social benefit is not high, and the transfer of civilized and saved social value view is not facilitated. For a long time, the average leakage rate of the water supply industry in China is about 25%, and pipe network leakage, metering leakage and related business leakage become the common prominent problems in the water supply industry. Therefore, the abnormal flow valve control protection has practical and innovative significance for systems such as public water, household water, fire-fighting water storage and the like.
2) Water supply enterprises do not realize the linkage protection function of a multi-stage electric control valve system, cannot realize timing, directional and quantitative water control, cannot realize interval periodic detection and maintenance, and is low in intelligent degree.
And the looped netowrk water supply technique is relatively laggard at present, and water utilities dispatch center mostly adopts online pressure sensor to concentrate data analysis and control the water supply pressure of hydraulic pump machine, leans on the manual work to patrol and seek and monitor the supply channel, can't carry out self-checking and control the protection according to the flow difference, has increased the manual maintenance cost undoubtedly.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an intelligent shutoff method for abnormal flow of a liquid pipeline, so as to solve the problems that the existing intelligent remote water meter does not have the function of abnormal flow protection of the pipeline and does not have the linkage protection function of a multi-stage electric control valve system, reduce the phenomena of leakage, leakage and leakage of water flow, realize timed, directional and quantitative water control, realize interval periodic detection and maintenance and achieve the purpose of saving water.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows.
An intelligent shutoff method for abnormal flow of a liquid pipeline is characterized in that a plurality of stages of abnormal flow detection control assemblies are arranged on the same water pipeline of a large user or an urban water supply ring network and an inlet and outlet water branch in a segmented manner, each stage of abnormal flow detection control assembly comprises a sensor assembly for detecting whether abnormal flow and abnormal pressure conditions occur in the section of the water pipeline, an electric control valve for controlling the on-off of the section of the water pipeline, a power supply for providing electric energy and a setting judgment module for receiving a feedback signal of the sensor assembly and controlling the electric control valve;
for a serial single main pipe: each sensor component feeds back water flow, water flow direction and water pressure signals in the water pipeline interval to the setting judgment module, and the setting judgment module compares, analyzes and judges the detected water flow, the setting time fixed value and the water flow minimum detection value which are set in the setting judgment module according to the detected water flow value and the received signal duration of the relevant valve in the water pipeline interval;
if the water leakage phenomenon occurs, when the set water quantity is reached or the set time fixed value is exceeded, the setting judgment module controls the electric control valve of the corresponding water pipeline interval to be closed;
if the water pipe generates the undercurrent leakage or is stolen, the setting judgment module controls the electric control valve of the corresponding water pipe interval to be closed when the water quantity minimum detection value is reached and the setting time fixed value is reached.
Further optimizing the technical scheme, the water running phenomenon is that a water meter descending water pipe is broken, a faucet is damaged or the faucet is forgotten to be turned off.
According to the technical scheme, the setting time constant value of the upper-level electric control valve is higher than that of the lower-level electric control valve on the serial pipeline, and each electric control valve can be closed step by step in abnormal flow or abnormal duration.
According to the technical scheme, the sensor assembly comprises a flow sensor and a pressure sensor, and signal output ends of the flow sensor and the pressure sensor are connected to a signal input end of the setting judgment module.
Further optimizing the technical scheme, for the urban ring network: a water service dispatching center water information acquisition, analysis and monitoring system software platform analyzes the direction flow relation among the relevant valves of each section of pipeline interval in real time or at regular time, calculates the flow difference, and judges whether the pipeline interval has water leakage or water theft conditions or not by combining the pressure change of the relevant valves of the pipeline interval;
and when the set minimum flow difference is exceeded, alarming according to a set principle, and informing a worker to patrol and manually close the corresponding mechanical valve or remotely close the electric control valve.
According to the technical scheme, the setting judgment module is interactively connected with a remote acquisition and analysis module used for carrying out centralized remote control on each electric control valve through a communication module.
The technical scheme is further optimized, the electric control valve is closed due to abnormal flow, and the remote acquisition and analysis module controls the electric control valve to be opened again; and if the setting judgment module still detects the abnormal flow, controlling the electric control valve to be closed for the second time.
Due to the adoption of the technical scheme, the technical progress of the invention is as follows.
The invention can realize sectional pipeline detection by arranging the multistage abnormal flow detection control assembly on the same water conveying pipeline in a sectional manner, ensure that a user or a worker can quickly determine a water leakage and water leakage interval, realize the timely maintenance of the pipeline in the water leakage and water leakage area, and effectively avoid the waste of water resources and secondary damage; according to the invention, the water flow in the water pipeline is detected in real time through the sensor assembly, when the conditions of water leakage, water leakage and water theft occur, the water flow can be quickly fed back to the setting judgment module, and the setting judgment module controls the corresponding electric control valve to be closed, so that the continuous occurrence of the resource waste phenomenon is effectively prevented, and the refined management is realized.
The upper and lower electric control valves are set with different time limits, the setting time fixed value of the upper electric control valve is higher than that of the lower electric control valve on the serial pipeline, and each electric control valve can be closed step by step when the flow is abnormal or the abnormal duration time exists, so that the linkage protection of a multi-stage electric control valve system is realized.
According to the invention, the remote acquisition and analysis module is used for carrying out centralized remote control on each electric control valve, so that the electric control valve has a remote resetting and opening function, and the convenience of controlling the electric control valve is realized.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the electric control valve of the present invention installed on the water pipeline in sections;
fig. 3 is a schematic structural diagram of the urban water supply main ring network and the water outlet branch in which abnormal flow detection control assemblies are respectively and sequentially arranged according to the invention.
Wherein: 1. the system comprises a water pipeline, 2, a sensor assembly, 3, a setting judgment module, 4, an electric control valve, 5, a remote acquisition and analysis module, 6, a power supply, 7, a main urban water supply ring network, 8, a water outlet branch, 9, an abnormal flow detection control assembly, a first main network valve, b, a second main network valve, c, a first user valve, d, a second user valve, e and a third user valve.
Detailed Description
The invention will be described in further detail below with reference to the figures and specific examples.
The method is carried out based on an intelligent shutoff system for the abnormal flow of the liquid pipeline, and the basic constitution of the system comprises an A mode and a B mode. In the system, the liquid in the pipe may be water or other fluid, and the embodiment is described with water as an object.
Mode A: the sensor assembly, the setting judgment module (setting fixed value and judgment output), the electric control valve, the power supply and the communication module are used for independently branching the condition with a plurality of water faucets.
Mode B: the system comprises a plurality of distributed basic units formed in the mode A, a centralized information acquisition correlation analysis system and remote control regulation, and is used for self-checking and protection of a large-user main pipeline for serial water supply.
Mode C: the remote online monitoring analysis control is suitable for self-checking, protecting and scheduling of parallel water supply of the annular water supply network.
In the A and B modes: an intelligent shutoff method for abnormal flow of a liquid pipeline is disclosed, which is combined with fig. 1 to 2, and a multi-stage abnormal flow detection control assembly 9 is arranged on the same water pipeline 1 in a segmented manner. Each stage of abnormal flow detection control assembly 9 comprises a sensor assembly 2 for detecting whether abnormal flow occurs in the section of the water pipeline, an electric control valve 4 for controlling the on-off of the section of the water pipeline, a power supply 6 for supplying electric energy and a setting judgment module 3 for receiving a feedback signal of the sensor assembly 2 and controlling the electric control valve 4. And a multi-stage electric control valve 4 is arranged on the same water pipeline 1, so that segmented pipeline detection can be realized, and a water leakage interval can be determined.
Each stage of abnormal flow detection control assembly can be synthesized in an intelligent water meter, and can also be independently used by a self-protection electric control system.
The sensor assembly 2 comprises a flow sensor and a pressure sensor, and the signal output ends of the flow sensor and the pressure sensor are connected to the signal input end of the setting judgment module 3. The sensor assembly 2 is used to sense a physical quantity of interest and is not limited to a flow sensor, but to a single sensor.
A setting judgment module 3: the setting judgment logic function includes but is not limited to the following functions, which may be a single function or a combined function, and is implemented by using a known digital circuit and an output circuit, and is not limited to various controller hardware, such as a PLC controller, a single chip microcomputer, and the like.
Each sensor component 2 feeds back the water flow and the water pressure signal in the water pipeline interval to the setting judgment module 3, the setting judgment module 3 compares, analyzes and judges the set water quantity, the setting time fixed value and the water quantity minimum detection value which are set in the setting judgment module 3 according to the detected water quantity value and the received signal duration, and a user can set the set water quantity.
If the water leakage phenomenon occurs, namely the water meter descending water pipe is broken, or the water faucet is damaged, or the water faucet is forgotten to be turned off, when the set water quantity is reached or the set time fixed value is exceeded, the setting judgment module 3 controls the electric control valve 4 to be turned off.
If the water pipeline leaks or is stolen, the setting judgment module 3 controls the electric control valve 4 to close when the water quantity minimum detection value is reached and the setting time fixed value is reached.
The electric control valve can be closed or opened after a certain setting delay, the control logic of the controller is optimized, automatic delay secondary opening after disconnection can be realized, and the electric control valve can be normally opened when the abnormality disappears; if the abnormality is not eliminated, the electrically controlled valve is closed for the second time.
The upper and lower electric control valves are set with different time limits, the setting time fixed value of the upper electric control valve is higher than that of the lower electric control valve on the serial pipeline, and each electric control valve can be closed step by step when the flow is abnormal or the abnormal duration time exists, so that the linkage protection of a multi-stage electric control valve system is realized.
Mode C: for the urban ring network, the water inlet of the water plant is provided, and the water outlet branch 8 distributed by each user is also provided. And abnormal flow detection control components 9 are respectively and sequentially arranged on the urban water supply main ring network 7 and the water outlet branch 8.
The flow sensor installed in this method has a direction measuring signal, and the flow and flow direction measuring method and device are different due to different pipe diameters, and belong to a known category, for example, the flow sensor adopts an on-line flow for monitoring the flow direction and speed disclosed in the utility model with the patent publication number of CN 206362419U.
The water service dispatching center water information acquisition, analysis and monitoring system software platform analyzes the direction flow relation among the relevant valves of each section of pipeline interval in real time or at regular time, calculates the flow difference, and can judge whether the section of pipeline has water leakage or water theft conditions by combining the pressure change of the relevant valves of the pipeline interval. And when the set minimum flow difference is exceeded, alarming according to a set principle, informing a worker to patrol and manually close the corresponding mechanical valve, or remotely closing the electric control valve, and then manually checking.
For example, in fig. 3, when the first main pipe valve a and the second main pipe valve b in the abnormal flow detection control assembly are marked with directional flows, the first user valve c, the second user valve d, and the third user valve e are respectively an electric control valve or a common mechanical valve arranged on the water outlet branch 8, and the sum of the flows passing through the first main pipe valve a and the second main pipe valve b is equal to the sum of the flows passing through the first user valve c, the second user valve d, and the third user valve e at this time. If the flow passing through the first main network valve a and the second main network valve b is poor with the flow sum of the first user valve c, the second user valve d and the third user valve e and is higher than the flow difference fixed value of normal pipeline loss, the problem that the pipeline between the first main network valve a and the second main network valve b is damaged and leaks or steals water is solved, the modes of alarming, pipeline inspection or valve closing can be adopted, the locating treatment is searched, the water pressure of the pump is timely and reasonably adjusted according to the actual condition, and the safety of a main network is ensured.
In addition, the invention can also flexibly combine analysis and monitoring in sections.
The electric control valve has the function of remote reset opening. The setting judgment module 3 is interactively connected with a remote acquisition and analysis module 5 through a communication module, and the remote acquisition and analysis module 5 is used for carrying out centralized remote control on each electric control valve 4. Due to abnormal flow, the electric control valve 4 is closed; the remote acquisition and analysis module 5 can control the electric control valve 4 to be opened again; and if the setting judgment module 3 still detects the abnormal flow, controlling the electric control valve 4 to close for the second time.
When the water supply system is actually used, a tap water company can self-check the water supply running state, the water consumption and the water consumption rule and optimize the water supply strategy and the technical scheme; the customer can realize self-checking and check the water consumption, realize the two-way transparent consumption of water supplier and customer side, can realize the directional ration accuse water regularly (like the public water room of many faucets in places such as student's dormitory building).
According to the intelligent water supply system, the pipeline electric control valve intelligent water control system is optimally designed, so that the effectiveness, economy and scientificity of water supply can be improved, and intelligent water supply is realized.
Claims (7)
1. An intelligent abnormal flow shutoff method for a liquid pipeline is characterized in that a plurality of stages of abnormal flow detection control assemblies are arranged on the same water pipeline (1) of a large user or an urban water supply ring network and an inlet and outlet water branch in a segmented manner, each stage of abnormal flow detection control assembly comprises a sensor assembly (2) for detecting whether abnormal flow and abnormal pressure conditions occur in the section of the water pipeline, an electric control valve (4) for controlling the on-off of the section of the water pipeline, a power supply (6) for providing electric energy and a setting judgment module (3) for receiving a feedback signal of the sensor assembly (2) and controlling the electric control valve (4);
for a serial single main pipe: each sensor component (2) feeds back a water flow, a water flow direction and a water pressure signal in the water pipeline interval to the setting judgment module (3), and the setting judgment module (3) compares, analyzes and judges the detected water flow, the set time fixed value and the water flow minimum detection value which are set in the setting judgment module (3) according to the detected water flow value and the received signal duration of the relevant valve in the water pipeline interval;
if the water leakage phenomenon occurs, when the set water quantity is reached or the set time fixed value is exceeded, the setting judgment module (3) controls an electric control valve (4) of the corresponding water pipeline interval to be closed;
if the water pipe generates the undercurrent water leakage or is stolen, the setting and judging module (3) controls the electric control valve (4) of the corresponding water pipe interval to be closed when the water quantity minimum detection value is reached and the setting time fixed value is reached.
2. The intelligent abnormal flow shutoff method for the liquid pipeline as claimed in claim 1, wherein the water running phenomenon is the breakage of the water meter downstream water pipeline, the damage of the faucet or the forgetting to turn off the faucet.
3. The intelligent shut-off method for abnormal flow of the liquid pipeline according to claim 1, characterized in that: on the serial pipeline, the setting time constant value of the upper-level electric control valve is higher than that of the lower-level electric control valve, and each electric control valve can be closed step by step when the flow is abnormal or the abnormal duration time is long.
4. The intelligent shut-off method for the abnormal flow of the liquid pipeline is characterized in that the sensor assembly (2) comprises a flow sensor and a pressure sensor, and signal output ends of the flow sensor and the pressure sensor are connected to a signal input end of the setting judgment module (3).
5. The intelligent shutoff method for the abnormal flow of the liquid pipeline according to claim 1, characterized in that for an urban ring network: a water service dispatching center water information acquisition, analysis and monitoring system software platform analyzes the direction flow relation among the relevant valves of each section of pipeline interval in real time or at regular time, calculates the flow difference, and judges whether the pipeline interval has water leakage or water theft conditions or not by combining the pressure change of the relevant valves of the pipeline interval;
and when the set minimum flow difference is exceeded, alarming according to a set principle, and informing a worker to patrol and manually close the corresponding mechanical valve or remotely close the electric control valve.
6. The intelligent shutoff method for the abnormal flow of the liquid pipeline according to claim 1, wherein the setting judgment module (3) is interactively connected with a remote acquisition and analysis module (5) for performing centralized remote control on each electric control valve (4) through a communication module.
7. The intelligent shutoff method for the abnormal flow of the liquid pipeline according to claim 6, characterized in that due to the abnormal flow, the electric control valve (4) is closed, and the remote acquisition and analysis module (5) controls the electric control valve (4) to be opened again; if the setting judgment module (3) still detects abnormal flow, the electronic control valve (4) is controlled to be closed for the second time.
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Cited By (3)
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| CN113608472A (en) * | 2021-08-05 | 2021-11-05 | 南京大学 | Household waterway intelligent monitoring system |
| CN113899010A (en) * | 2021-10-14 | 2022-01-07 | 沈阳和同科技有限公司 | Intelligent heat supply monitoring system |
| CN114625030A (en) * | 2022-03-10 | 2022-06-14 | 水艺控股集团股份有限公司 | Terminal water taking device capable of preventing water stealing |
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