CN108490804A - Pipeline minute leakage detectability appraisal procedure under a kind of complex environment - Google Patents
Pipeline minute leakage detectability appraisal procedure under a kind of complex environment Download PDFInfo
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- CN108490804A CN108490804A CN201810126915.5A CN201810126915A CN108490804A CN 108490804 A CN108490804 A CN 108490804A CN 201810126915 A CN201810126915 A CN 201810126915A CN 108490804 A CN108490804 A CN 108490804A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B17/00—Systems involving the use of models or simulators of said systems
- G05B17/02—Systems involving the use of models or simulators of said systems electric
Abstract
The invention discloses pipeline minute leakage detectability appraisal procedures under a kind of complex environment, the described method comprises the following steps：Pipe leakage system model is established by Flowmaster softwares and chooses every component parameters, carries out transient flow method leak detection and calculation of position errors；Assess influence of the variation of leakage point position, leak sizes to positioning accuracy；The pipe leakage system model of a caliber change and secondary caliber change is established, assessment pipe diameter changes the influence to positioning accuracy；Assess the influence of elbow, water pump to positioning accuracy.The present invention has probed into the influence that leakage point position, leak size, the caliber change in pipeline, the elbow in pipeline and water pump detect harmonic attenuation method positioning accuracy, and the applicability of this method in complex situations has been obtained by interpretation of result.
Description
Technical field
It lets out the present invention relates to pipeline is small under transient flow pipeline minute leakage detection field more particularly to a kind of complex environment
Leak detection capability assessment method, this method are based on Flowmaster softwares.
Background technology
The oil and gas pipeline transport in China has come into the stage of comparative maturity at present, and many pipelines have all been transported
It goes for many years, but every year since economic loss caused by pipe leakage problem is inestimable[1].With the increasing of pipeline service life
Add, this problem can be increasingly severe in future, will also result in rugged environment pollution.Meanwhile the water supply network in city
Identical problem is faced, according to official statistics, the average leak rate of more than 600 a public supply mains of China is more than 15%, highest
Up to 70% or more, the huge waste of resource is caused[2].Therefore, effective pipeline leakage detection method is to solve these to ask
The key of topic, the also always focus of related field focus of attention.
Transient flow method is more and more popular in recent years pipeline leakage detection method, because only needing to give in implementation process
Pipeline applies pumping signal, detects the pressure history of fluid in pipeline and is analyzed, is had compared with other detection methods
There is process simply, to equipment and use environment to require more low advantage[3].In addition, current pipeline is small let out there are many situation
Leakage, and flow rate of liquid is slow, and pipeline distance, can not complete to detect near leakage point, cause traditional detection side in addition
Method is difficult to meet the requirements.Transient flow method has particularly evident advantage in the case of long range, minute leakage, therefore by more
Carry out more concerns.
The Active spurring harmonic attenuation method that Wang et al. is proposed[4], complicated calculating process of Reverse Analysis Way of Trouble is eliminated,
Whole important parameters of system are needed not know about, only by applying pumping signal to pipeline, measure the pressure letter of certain point in pipeline
Leakage point can be positioned by number carrying out analysis, make transient flow method more attractive.
But so far, this method also predominantly stays in theoretical research and preliminary experimental stage, in laboratory condition
Under preferable effect can be obtained to long straight pipeline, the application in actual pipe detection project but has not been reported.To find out its cause, main
If because actual pipe condition is complicated very much, there are variations of various pipelines etc., these can all influence the flowing of transient flow
Rule in turn impacts result.
Invention content
The present invention provides pipeline minute leakage detectability appraisal procedure under a kind of complex environment, the present invention solves transition
The problem of stream harmonic attenuation method exists in practical applications, it is described below：
Pipeline minute leakage detectability appraisal procedure under a kind of complex environment, the described method comprises the following steps：
Pipe leakage system model is established by Flowmaster and chooses every component parameters, carries out transient flow method leakage
Detect simultaneously calculation of position errors；
Assess influence of the variation of leakage point position, leak sizes to positioning accuracy；
The pipe leakage system model of a caliber change and secondary caliber change is established, assessment pipe diameter variation is to fixed
The influence of position precision；
Assess the influence of elbow, water pump to positioning accuracy.
Wherein, the pipe leakage system model is specially：
By left side water tank, right side water tank, first pipe, second pipe, third pipeline, leak, external environment, valve,
This few part composition of valve positioner.
Further, for the leak between first pipe and second pipe, valve is located at second pipe and third
Between pipeline, the length by changing each section pipeline changes the position of leakage point and valve actuation.
Further, in the duct, the opening and closing of valve is controlled by connecting valve controller, valve for the valve installation
The opening and closing curve of valve can be arbitrarily arranged in controller；The pipeline is disposed as elastic pipeline.
The pipeline leaks through a leak connection external atmosphere pressure to simulate, and the diameter of the leak can
It adjusts；External environment is arranged by a constant voltage elements, and pressure is standard atmospheric pressure.
When specific implementation, by valve be set as from 1s when begin to shut off, used time 0.05s is closed to 80% and opens from fully opening
The state opened ensures that the transient flow signal generated propagates enough periodicities in all pipelines.
Further, the pipe leakage system model of a caliber change is specially：
Element between second pipe and third pipeline is reducing element, and the 4th pipeline is used for adjusting the pipe after variation
Diameter, second pipe, the sum of the length of third pipeline and the 4th pipeline are constant；
Probe into influence of the diameter after the variation of the 4th pipeline to measurement result.
Further, the pipe leakage system model of the secondary caliber change is specially：
There are diameter changes at two, other parameters to be consistent in entire pipeline, position error 28.2%.
Wherein, the influence of the assessment elbow to positioning accuracy be specially：
The pipe leakage system model for including elbow is established, angle of bend is 90 degree, and diameter and pipeline are consistent；
It establishes while containing there are two the pipe leakage system models of elbow；Pumping signal is generated to examine when leaking
Pipeline pressure is detected at measuring point a to change over time；According to the applicability of outcome evaluation elbow.
Further, the influence of the assessment water pump to positioning accuracy be specially：
The pipe leakage system model for including water pump is established, water pump is constant voltage water pump, and left side water tank and right side water tank are perseverance
Water tank is pressed, the kinetic energy that liquid flows in pipeline is all provided by water pump；
Pumping signal is generated, when leaking, detection pipeline pressure changes over time at test point b；According to result
Assess the applicability of water pump.
The advantageous effect of technical solution provided by the invention is：
1, this method establishes the model of leakage pipe, by introducing different elements in system, to work under different situations
The pipeline of work carries out the simulation work of harmonic attenuation method, Transient analysis is carried out using Flowmaster softwares, with leakage point
Positioning relative error is evaluation criteria；
2, the present invention probed into leakage point position, leak size, the caliber change in pipeline, the elbow in pipeline, with
And water pump detects harmonic attenuation method the influence of positioning accuracy, and the suitable of this method in complex situations has been obtained by interpretation of result
The property used.
Description of the drawings
Fig. 1 is a kind of flow chart of pipeline minute leakage detectability appraisal procedure under complex environment；
Fig. 2 is the structural schematic diagram of pipe leakage system model；
Fig. 3 is the schematic diagram of the leakage model for pipeline comprising a caliber change；
Fig. 4 is the schematic diagram of the leakage model for pipeline comprising caliber change twice；
Fig. 5 is the schematic diagram of the leakage model for pipeline containing elbow；
Fig. 6 is the schematic diagram that the pressure value of the pipeline containing elbow changes；
Fig. 7 is the schematic diagram of the leakage model for pipeline containing water pump；
Fig. 8 is the schematic diagram of the pressure waveform in the road containing pump line.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, embodiment of the present invention is made below further
It is described in detail on ground.
Flowmaster is current most famous, the most widely used thermofluid system simulation software in the whole world[1], have and calculate
Efficient, the advantages that model solution ability is strong, and convenient quickly is modeled, equipment performance is required low.The embodiment of the present invention is logical
It crosses the software and establishes pipeline model close to actual conditions, the complex situations being likely to occur in various practical applications are imitated
Very, the applicability of harmonic attenuation method is demonstrated, to be promoted in actually detected.
Embodiment 1
An embodiment of the present invention provides pipeline minute leakage detectability appraisal procedure under a kind of complex environment, referring to Fig. 1,
This approach includes the following steps：
101：Pipe leakage system model is established by Flowmaster and chooses every component parameters, carries out transient flow method
Leak detection and calculation of position errors；
102：Assess influence of the variation of leakage point position, leak sizes to positioning accuracy；
103：Establish the pipe leakage system model of a caliber change and secondary caliber change, assessment pipe diameter variation
Influence to positioning accuracy；Assess the influence of elbow, water pump to positioning accuracy.
Wherein, the pipe leakage system model in step 101 is specially：
By left side water tank, right side water tank, first pipe, second pipe, third pipeline, leak, external environment, valve,
This few part composition of valve positioner.
Wherein, for above-mentioned leak between first pipe and second pipe, valve is located at second pipe and third pipeline
Between, the length by changing each section pipeline changes the position of leakage point and valve actuation.
Wherein, in the duct, the opening and closing of valve is controlled by connecting valve controller for above-mentioned valve installation, valve control
The opening and closing curve of valve can be arbitrarily arranged in device；Pipeline is disposed as elastic pipeline.
Wherein, the leak that leaks through of pipeline connects external atmosphere pressure to simulate, and the diameter of leak is adjustable；Outside
Boundary's environment is arranged by a constant voltage elements, and pressure is standard atmospheric pressure.
When specific implementation, by valve be set as from 1s when begin to shut off, used time 0.05s is closed to 80% and opens from fully opening
The state opened ensures that the transient flow signal generated propagates enough periodicities in all pipelines.
Wherein, the pipe leakage system model of a caliber change in step 103 is specially：
Element between second pipe and third pipeline is reducing element, and the 4th pipeline is used for adjusting the pipe after variation
Diameter, second pipe, the sum of the length of third pipeline and the 4th pipeline are constant；
Probe into influence of the diameter after the variation of the 4th pipeline to measurement result.
Wherein, the pipe leakage system model of the secondary caliber change in step 103 is specially：
There are diameter changes at two, other parameters to be consistent in entire pipeline, position error 28.2%.
Further, influence of the assessment elbow to positioning accuracy in step 103 be specially：
The pipe leakage system model for including elbow is established, angle of bend is 90 degree, and diameter and pipeline are consistent；
It establishes while containing there are two the pipe leakage system models of elbow；Pumping signal is generated to examine when leaking
Pipeline pressure is detected at measuring point a to change over time；According to the applicability of outcome evaluation elbow.
Further, influence of the assessment water pump to positioning accuracy in step 103 be specially：
The pipe leakage system model for including water pump is established, water pump is constant voltage water pump, and left side water tank and right side water tank are perseverance
Water tank is pressed, the kinetic energy that liquid flows in pipeline is all provided by water pump；
Pumping signal is generated, when leaking, detection pipeline pressure changes over time at test point b；According to result
Assess the applicability of water pump.
In conclusion 101- steps 103 solve transient flow harmonic attenuation method and exist the embodiment of the present invention through the above steps
The problem of practical application, emulates the complex situations being likely to occur in various practical applications, demonstrates harmonic wave and decline
The applicability of subtraction, to be promoted in actually detected.
Embodiment 2
With reference to Fig. 2-Fig. 8, and specific example further introduces the scheme in embodiment 1, refers to
It is described below：
201：Pipe leakage system model is established by Flowmaster and chooses every component parameters, carries out transient flow method
Leak detection and calculation of position errors；
Wherein, detailed operate of the step is：
1) pipe leakage system model is established by Flowmaster, as shown in Figure 2.The pipe leakage system model is main
By water tank (left side water tank 1 and right side water tank 2), pipeline (first pipe 3, second pipe 4 and third pipeline 5), leak 6, outer
This few part composition of portion's environment, valve 7, valve positioner 8.
The total length of first pipe 3, second pipe 4 and third pipeline 5 be 1000m, by pipeline be divided into three parts be in order to
The elements such as leak 6 and valve 7 are added, for leak 6 between first pipe 3 and second pipe 4, valve 7 is located at the second pipe
Between road 4 and third pipeline 5, the length by changing each section pipeline can change the position that leakage point and valve 7 encourage.For
Close to actual conditions, three parts pipeline is disposed as elastic pipeline, the roughness of a diameter of 0.2m, three parts inner wall of the pipe are equal
For 0.025mm.
2) water tank parameter is set；
Select water tank for constant pressure water tank in Flowmaster softwares, the water level of setting left side water tank 1 is 20m, right side water
The water level of case 2 is 10m, is connected by waterpipe.The pressure of constant pressure water tank will not change over time, therefore three part tube in the steady state
Flow in road is flowed from left to right with constant speed, and pressure velocity of wave is 1000m/s.
3) setting applies valve 7 mode of excitation；
Harmonic attenuation method needs to generate transient flow, applies pumping signal to the fluid in pipeline using the opening and closing of valve 7,
Ball valve element 7 is selected to install in the duct.The opening and closing of valve 7 is controlled by connecting a valve positioner 8, the valve
The opening and closing curve of valve 7 can be arbitrarily arranged in controller 8.
4) leak 6 is set；
The leak 6 that leaks through of pipeline connects external atmosphere pressure P to simulate, and the diameter of leak 6 is adjustable.Leakage
Point is located at the 200m apart from water tank 1 on the left of pipeline, and the area of leak 6 is 20mm2.External environment passes through a constant voltage elements
It is arranged, pressure is standard atmospheric pressure.
5) parameter of valve positioner 8 is set；
By valve 7 be set as from 1s when begin to shut off, used time 0.05s is closed to the state of 80% unlatching from fully opening,
It can ensure that the transient flow signal generated can propagate enough periodicities in all pipelines in this way, facilitate fitting, while again
Major injury will not be caused to all pipelines.
6) position simultaneously calculation of position errors to leakage using harmonic attenuation method.
Bibliography gives detailed calculating process in [3], and which is not described herein again.Result of calculation is as shown in table 1, wherein
RnThe attenuation coefficient of n-th harmonic caused by indicating leakage.Positioning result is shown in the 198.5m that pipeline is located at left side water tank 1
There is leakage in position, the practical leak position in model is 200m, and there are the position errors of 1.5m, accurately have found and let out
Leak position.
1 positioning result of table
202：Assess influence of the variation of leakage point position to positioning accuracy；
The step it is detailed operation be：
1) the pipe leakage system model established in step 201 is used, the length by changing first pipe 3 is let out to control
The position of leak source allows leakage point to have 500m apart from left side water tank 1 from there is the position from 50m to be changed to always apart from left side water tank 1
Position.Other parameters are consistent.
2) leakage of each position is positioned with harmonic attenuation method respectively, obtains that the results are shown in Table 2.
The position error of the different leakage points of table 2 position
3) applicability according to the outcome evaluation localization method in different leakage point positions.
The result shows that when leakage point is located at and has 350m apart from left side water tank 1, positioning accuracy reaches highest, almost accurately
Leak position is had found, but the positioning result error apart from the too close or too far leakage point of left side water tank 1 is larger.Especially pair
In thering is the leakage at 50m, error to reach 9.9% apart from left side water tank 1.
203：Assess influence of the leak sizes to positioning accuracy；
The step it is detailed operation be：
1) the pipeline leakage checking system model established in step 201 is used, controls leakage area from 10mm2It is changed to
2000mm2, other parameters are consistent.
2) each leak position is positioned using harmonic attenuation method, obtains that the results are shown in Table 3.
The position error of the different leak sizes of table 3
3) according to the outcome evaluation localization method in the asynchronous applicability of leak sizes.
The result shows that this method for minute leakage all have higher precision, and error will not with leak sizes and
Significant change occurs, but (is 1500mm in embodiments of the present invention when leaking hole area and increasing to a certain degree2), positioning
Error can significantly increase.Therefore harmonic attenuation method can position minute leakage, but can not for excessive leakage possibly
It is accurately positioned, and error can be dramatically increased with the increase of leakage rate.
204：Assess influence of the pipe diameter variation to positioning accuracy；
The step it is detailed operation be：
1) the pipe leakage system model for only including a caliber change is established, as shown in Figure 3.In second pipe 4 and
Element between three pipelines 5 is reducing element 10, and the 4th pipeline 9 is used for adjusting the caliber after variation, second pipe 4, third pipe
The sum of the length in road 5 and the 4th pipeline 9 is still 1000m.The pipe diameter in 10 left side of reducing element is 0.2m, probes into the 4th
Influence of the diameter to measurement result after the variation of pipeline 9.Other parameters are consistent with step 201.
2) leak position is positioned using harmonic attenuation method, obtains that the results are shown in Table 4.
Table 4 contains the position error of a caliber change
3) applicability according to the outcome evaluation localization method when including only a caliber change.The result shows that working as pipe
When diameter variation range less (is less than 10%), caliber mutation is smaller on the impact of transient flow influence, and position error is in and can connect
By in the range of, when pipeline is there are when larger inner diameter variation, then positioning is produced bigger effect.
4) the pipe leakage system model for including caliber change twice is established, as shown in Figure 4.First pipe 3, second in figure
The diameter of a diameter of 0.2m of pipeline 4, a diameter of 0.18m of the 5th pipeline 11, the 4th pipeline 9 and third pipeline 5 continues to become
As low as 0.16m.There are diameter changes at two, other parameters to be consistent in entire pipeline, position error 28.2%.
5) applicability according to the outcome evaluation localization method when comprising caliber change twice.The result shows that even if
When the variation range of very little (be less than 10%), transient flow each harmonic will be unsatisfactory for index due to the change in shape of pipeline in pipeline
Type decays, and causes fitting result nonsensical.Therefore this method is not suitable for the case where pipe diameter is in the presence of the primary above change,
The phenomenon that error can be caused excessive.
205：Assess influence of the elbow 12 to positioning accuracy；
The step it is detailed operation be：
1) the pipe leakage system model for including elbow 12 is established, as shown in Figure 5.12 angle of elbow be 90 degree, diameter with
Pipeline is consistent, and is 0.2m, and other parameters are consistent.
2) it establishes while containing there are two the pipe leakage system models of elbow 12.
3) pumping signal is generated, when leaking, detection pipeline pressure changes over time at test point a, is tied
Fruit is as shown in Figure 6.
4) applicability according to the outcome evaluation localization method when comprising elbow 12.The result shows that curvature is significantly greater than
The elbow 12 of pipe radius, the influence to transient flow in pipeline almost can be ignored, and the elbow 12 that radius of curvature is smaller
And elbow bend 12, the pressure of fluid in pipeline can be made integrally to reduce a definite value, other than the DC component in frequency spectrum,
On each harmonic without influence, therefore positioning accuracy is not interfered with.And the quantity of elbow 12 will not impact testing result.
206：Assess influence of the water pump 14 to positioning accuracy.
The step it is detailed operation be：
1) the pipe leakage system model for including water pump 14 is established, as shown in Figure 7.Water pump 14 is constant voltage water pump, and work is defeated
It is 0.5MPa to go out pressure.Water tank 1 and right side water tank 2 are constant pressure water tank on the left of pipeline both sides, and water level is disposed as 10m, manages at this time
The kinetic energy that liquid flows in road is all provided by water pump 14.Other parameters are consistent.
2) pumping signal is generated, when leaking, detection pipeline pressure changes over time at test point b, is tied
Fruit is as shown in Figure 8.
3) applicability according to the outcome evaluation localization method when comprising water pump 14.The result shows that in the pipe leakage
Water pump 14 is added in system model to increase a definite value to the pressure in pipeline, will not change the intensity of harmonic component.Therefore
Water pump 14 carries out leakage detection and localization for harmonic attenuation method not to be influenced, and the pipe leakage containing pump can be carried out by this method
Detection.
In conclusion 201- steps 206 establish the model of leakage pipe to the embodiment of the present invention through the above steps, pass through
Different elements is introduced in system, and the simulation work of harmonic attenuation method is carried out to the pipeline to work under different situations, is utilized
Flowmaster softwares carry out Transient analysis, using leak point positioning relative error as evaluation criteria.
Bibliography
[1] Zhang Yu, Pipeline Leak new detecting method and key technology research [D] University Of Tianjin, 2009.
[2] Xu Jianhua motor vehicle antifreeze fluids quality is chilled the heart [N] China Quality Newspaper Office, 2014-06-13 (002)
[3] Kang Xianzhi, Li Jian, Zhang Yu, wait pipe leakage Position Research [J] computer engineering of the based on transient flow method with
Using 2015,51 (19):255-259.
[4]Wang XJ,Lambert M F,Simpson A R.Detection and Location of fa
Partial Blockage in Pipeline Systems Using Damping of fFluid Transients[C]//
Critical Transitions in Water and Environmental Resources Management.ASCE,
2005:1-10.
To the model of each device in addition to doing specified otherwise, the model of other devices is not limited the embodiment of the present invention,
As long as the device of above-mentioned function can be completed.
It will be appreciated by those skilled in the art that attached drawing is the schematic diagram of a preferred embodiment, the embodiments of the present invention
Serial number is for illustration only, can not represent the quality of embodiment.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (10)
1. pipeline minute leakage detectability appraisal procedure under a kind of complex environment, which is characterized in that the method includes following
Step：
Pipe leakage system model is established by Flowmaster softwares and chooses every component parameters, carries out transient flow method leakage
Detect simultaneously calculation of position errors；
Assess influence of the variation of leakage point position, leak sizes to positioning accuracy；
The pipe leakage system model of a caliber change and secondary caliber change is established, assessment pipe diameter variation is to positioning accurate
The influence of degree；
Assess the influence of elbow, water pump to positioning accuracy.
2. pipeline minute leakage detectability appraisal procedure, feature exist under a kind of complex environment according to claim 1
In the pipe leakage system model is specially：
By left side water tank, right side water tank, first pipe, second pipe, third pipeline, leak, external environment, valve, valve
This few part composition of controller.
3. pipeline minute leakage detectability appraisal procedure, feature exist under a kind of complex environment according to claim 2
In the leak is between first pipe and second pipe, and valve is between second pipe and third pipeline, by changing
The length for becoming each section pipeline changes the position of leakage point and valve actuation.
4. pipeline minute leakage detectability appraisal procedure, feature exist under a kind of complex environment according to claim 2
In in the duct, the opening and closing of valve is controlled by connecting valve controller, and valve positioner can arbitrarily be set for the valve installation
Set the opening and closing curve of valve；The pipeline is disposed as elastic pipeline.
5. pipeline minute leakage detectability under a kind of complex environment according to any claim in Claims 1-4
Appraisal procedure, which is characterized in that
The pipeline leaks through a leak connection external atmosphere pressure to simulate, and the diameter of the leak is adjustable；Outside
Boundary's environment is arranged by a constant voltage elements, and pressure is standard atmospheric pressure.
6. pipeline minute leakage detectability under a kind of complex environment according to any claim in Claims 1-4
Appraisal procedure, which is characterized in that
By valve be set as from 1s when begin to shut off, used time 0.05s is closed to the state of 80% unlatching from fully opening, and ensures production
Raw transient flow signal propagates enough periodicities in all pipelines.
7. pipeline minute leakage detectability under a kind of complex environment according to any claim in Claims 1-4
Appraisal procedure, which is characterized in that the pipe leakage system model of a caliber change is specially：
Element between second pipe and third pipeline is reducing element, and the 4th pipeline is used for adjusting the caliber after variation, the
The sum of the length of two pipelines, third pipeline and the 4th pipeline is constant；
Probe into influence of the diameter after the variation of the 4th pipeline to measurement result.
8. pipeline minute leakage detectability under a kind of complex environment according to any claim in Claims 1-4
Appraisal procedure, which is characterized in that the pipe leakage system model of the secondary caliber change is specially：
There are diameter changes at two, other parameters to be consistent in entire pipeline, position error 28.2%.
9. pipeline minute leakage detectability appraisal procedure, feature exist under a kind of complex environment according to claim 1
In influence of the assessment elbow to positioning accuracy is specially：
The pipe leakage system model for including elbow is established, angle of bend is 90 degree, and diameter and pipeline are consistent；
It establishes while containing there are two the pipe leakage system models of elbow；Pumping signal is generated, when leaking, in test point
Pipeline pressure is detected at a to change over time；According to the applicability of outcome evaluation elbow.
10. pipeline minute leakage detectability appraisal procedure, feature exist under a kind of complex environment according to claim 1
In influence of the assessment water pump to positioning accuracy is specially：
The pipe leakage system model for including water pump is established, water pump is constant voltage water pump, and left side water tank and right side water tank are constant pressure water
Case, the kinetic energy that liquid flows in pipeline are all provided by water pump；
Pumping signal is generated, when leaking, detection pipeline pressure changes over time at test point b；According to outcome evaluation
The applicability of water pump.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081319A (en) * | 2019-05-29 | 2019-08-02 | 中国水利水电科学研究院 | A kind of design method of controllable transient flow leak detection system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864642A (en) * | 2016-06-06 | 2016-08-17 | 浙江理工大学 | Novel pipeline leakage detecting device and method |
| KR20170100818A (en) * | 2016-02-26 | 2017-09-05 | 한동대학교 산학협력단 | Siphon circuit breaker simulation device and its using mehtod |
| CN107218516A (en) * | 2017-07-19 | 2017-09-29 | 中国水利水电科学研究院 | A kind of water delivery in pipeline system multiple spot minute leakage detection means and method |
-
2018
- 2018-02-08 CN CN201810126915.5A patent/CN108490804A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170100818A (en) * | 2016-02-26 | 2017-09-05 | 한동대학교 산학협력단 | Siphon circuit breaker simulation device and its using mehtod |
| CN105864642A (en) * | 2016-06-06 | 2016-08-17 | 浙江理工大学 | Novel pipeline leakage detecting device and method |
| CN107218516A (en) * | 2017-07-19 | 2017-09-29 | 中国水利水电科学研究院 | A kind of water delivery in pipeline system multiple spot minute leakage detection means and method |
Non-Patent Citations (2)
| Title |
|---|
| 康宪芝 等: "基于瞬变流法的管道泄漏定位研究", 《计算机工程与应用》 * |
| 张宇: "输油管道泄漏检测新方法与关键技术研究", 《中国博士学位论文全文数据库 信息科技辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110081319A (en) * | 2019-05-29 | 2019-08-02 | 中国水利水电科学研究院 | A kind of design method of controllable transient flow leak detection system |
| CN110081319B (en) * | 2019-05-29 | 2020-05-01 | 中国水利水电科学研究院 | Design method of controllable transient current leakage detection system |
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