CN113157007B - 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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- 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 a water flow and water pressure signal in the water pipeline interval to a setting judgment module, and the setting judgment module compares, analyzes and judges the water flow and the water pressure signal with a set water quantity, a setting time fixed value and a water quantity minimum detection value according to a detected water quantity value and a received signal duration; 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
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 as follows:
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 phenomena of leakage and leakage of water flow cannot be reduced, waste of water resources and secondary damage are caused by water leakage, for example, decoration of upper and lower floors, cable trenches, equipment rooms and the like are soaked, the social benefit is not high, and the transfer of civilized and economical social value 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 network 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 water pressure pump machine, leans on artifical tour to seek and monitor the supply channel, can't carry out self-checking and control protection according to the flow difference, has increaseed artifical 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 water inlet and outlet branches 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 interval of the water pipeline, an electric control valve for controlling the on-off of the interval of the water pipeline, a power supply for providing electric energy and a setting judgment module for receiving feedback signals of the sensor assembly and controlling the electric control valve;
for a serial single main pipe: each sensor component feeds back a water flow, a water flow direction and a water pressure signal in the water pipeline interval to a setting judgment module, and the setting judgment module compares, analyzes and judges the set water quantity, the setting time fixed value and the lowest water quantity detection value which are set in the setting judgment module according to the detected water quantity value and the time length of receiving signals at the relevant valve of 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 undercurrent water leakage or is stolen, the setting judgment module controls the electric control valve of the corresponding water pipe interval to be closed when the lowest water quantity 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, on a serial pipeline, the setting time fixed 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 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 close for the second time.
Due to the adoption of the technical scheme, the technical progress of the invention is as follows.
By arranging the multistage abnormal flow detection control assembly on the same water conveying pipeline in a segmented mode, segmented pipeline detection can be realized, a user or a worker can be ensured to quickly determine a water leakage and water leakage interval, the pipeline in the water leakage and water leakage area can be overhauled in time, and waste of water resources and secondary damage are effectively avoided; 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 convenience in control of the electric control valve is realized.
Drawings
FIG. 1 is a schematic view of the structure 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 ring network of urban water supply, 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 invention is carried out based on an intelligent shutoff system for abnormal flow of a liquid pipeline, and the basic composition of the system comprises a mode A and a mode B. 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 device comprises a sensor assembly, a setting judgment module (setting fixed value and judgment output), an electric control valve, a power supply and a communication module, and is used for the situation that a plurality of water taps are arranged in a single branch.
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 relevant physical quantity, not limited to a flow sensor, not limited 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 water flow and water pressure signals in the water pipeline interval to the setting judgment module 3, the setting judgment module 3 compares, analyzes and judges the set water amount, the setting time fixed value and the water amount minimum detection value set in the setting judgment module 3 according to the detected water amount value and the received signal duration, and a user can set the set water amount.
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 is normally opened when the abnormality disappears; if the abnormity is not eliminated, the electric control valve is closed for the second time.
According to the invention, different time limits are set for the upper and lower electronic control valves, on a serial pipeline, the setting time fixed value of the upper electronic control valve is higher than that of the lower electronic control valve, and each electronic control valve can be closed step by step in abnormal flow or abnormal duration, so that the linkage protection of a multi-stage electronic 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 measuring method and device for the flow and flow direction are different due to the different pipe diameters, and belong to the known category, for example, the utility model with patent publication No. CN206362419U discloses an on-line flow for monitoring the direction and speed of water flow.
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 disposed on the water outlet branch 8, and a sum of flows passing through the first main pipe valve a and the second main pipe valve b is equal to a sum of 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 through the first main network valve a, the second main network valve b and the flow of the first user valve c, the second user valve d and the third user valve e are poor, and when the flow 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 described, an alarm can be given, the pipeline is patrolled or the valve is closed, the locating processing is searched, the water pressure of the pump machine is timely and reasonably adjusted according to actual conditions, 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; if the setting judgment module 3 still detects abnormal flow, the electronic control valve 4 is controlled to be closed 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 that the self-checking checks the water consumption, realizes the two-way transparent consumption of water supply side and customer side, can realize directional ration accuse water regularly (like the public water room of many faucets in places such as students' dormitory building).
According to the intelligent water control system, the pipeline electric control valve is optimally designed, so that the effectiveness, economy and scientificity of water supply can be improved, and intelligent water supply is realized.
Claims (3)
1. 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 (1) of a large user or an urban water supply ring network and a water inlet branch and a water outlet 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 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);
for a serial single main pipe: each sensor component (2) feeds water flow, water flow direction and water pressure signals in the water pipeline interval back 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, when the lowest water quantity detection value is reached and the setting time fixed value is reached, the setting judgment module (3) controls an electric control valve (4) of the corresponding water pipe interval to be closed;
the upper and lower electric control valves are set to have different time limits, on the serial pipeline, the setting time fixed value of the upper electric control valve is higher than that of the lower electric control valve, 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;
for urban ring networks: 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;
when the set minimum flow difference is exceeded, alarming is carried out according to a set principle, and workers are informed to patrol and manually close the corresponding mechanical valve or remotely control and close the electric control valve;
the setting judgment module (3) is interactively connected with a remote acquisition and analysis module (5) for carrying out centralized remote control on each electric control valve (4) through a communication module;
due to 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.
2. The intelligent abnormal flow shutoff method for the liquid pipeline according to claim 1, wherein the water running phenomenon is the breakage of a downstream water pipeline of the water meter, the damage of a faucet or the forgetting of shutting off the faucet.
3. 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).
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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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