CN106813109A - A kind of fluid leakage on-line monitoring and alignment system and method - Google Patents
A kind of fluid leakage on-line monitoring and alignment system and method Download PDFInfo
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- CN106813109A CN106813109A CN201710151879.3A CN201710151879A CN106813109A CN 106813109 A CN106813109 A CN 106813109A CN 201710151879 A CN201710151879 A CN 201710151879A CN 106813109 A CN106813109 A CN 106813109A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
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Abstract
The invention discloses fluid leakage on-line monitoring and alignment system and method in a kind of automatic Pipeline, a set of main station system and two sets or more than two sets of substation system are specifically included；Wherein often set substation system includes infrasonic sensor, pressure transmitter, flowmeter, valve, external power source, digitizer, by to sound wave ranking in pipeline, automatically selecting infrasound method and (or) transient model method carries out leakage alarm and to leak point positioning, compared to existing monitoring and positioning system, the system that the present invention is provided has positioning precision higher, accuracy higher, adaptability for working condition higher.
Description
Technical field
The invention discloses a kind of fluids within pipes leakage on-line monitoring and alignment system and method, the invention belongs to fluid
Discharge pressure Oil pipeline leak detection technical field.
Background technology
The core of conduit running management is " safety and economy ".In recent years, because calamitous caused by gas oil pipe leakage
Frequent Accidents, the safe operation and maintenance of pipeline receive threat and challenge.Therefore advanced scientific method is needed to use to set up
Pipe safety pre-alarm system, real-time monitoring is carried out by effective technological means to fluids within pipes leakage accident, accurate hair
Go out leakage alarm and quickly position, start corresponding emergency preplan in order to production unit, and can realize that incident of leakage is processed
Process monitoring.Realize above-mentioned functions, it is necessary first to the change of fluids within pipes related data is continued to monitor by technological means,
Accurately and rapidly recognize and extract by leaking feature to fluids within pipes, it is quick and be accurately positioned leak position.
At present, fluids within pipes leakage monitoring method mainly has：Pressure spot analytic approach, negative pressure wave method, difference in flow monitoring method,
Fiber optic cable monitor method etc., these methods can only judge whether fluids within pipes leak, it is impossible to be accurately positioned the leak position of fluid.Closely
Nian Lai, infrasound method (Chen Chi etc., oil-gas field surface engineering, volume 32, the 4th phase, 72-73 pages in 2013) is widely used in fixed
Position fluids within pipes leak position.By the infrasound signal that produces when detecting that fluids within pipes are leaked reach detector when
Between, it is multiplied by the infrasonic spread speed of internal fluid, you can positioning fluid leak position.But, infrasound signal is by temperature, pressure
Power, flow velocity and density etc. influence, and fluctuate larger, once operating mode changes, the pressure in pipeline, flow velocity can change therewith, pipe
Noise and leakage characteristics in road change therewith, if do not re-started Data Collection, data analysis, parameter modification, leakage characteristics
Analysis, just occurs that feature None- identified is caused to report by mistake or failed to report because parameter is mismatched.Transient model method (is handed in Meng Lingya, Beijing
Logical college journal, volume 32, the 3rd phase, 73-77 pages in 2008) it is mainly by the theory at Simulation Prediction pipe inspection point
Pressure, is compared with actual measurement pressure, and pipe is thought when difference between the two meets or exceeds some threshold value
Line there occurs leakage, and leakage point is positioned by ranging formula then, and this method is to be widely studied in the world at present
And most line leakage methods is applied, the method is when pipeline occurs Small leak, it is difficult to detect, even if detecting
Position error is big.
The content of the invention
For in the prior art, working conditions change is larger to leak detection and positioning effects, and the present invention provides a kind of pipeline stream
Body leak detection and location system and method, by real-time monitoring pipeline internal pressure power, instantaneous delivery, with reference to pipe diameter, pipeline
The speed that speed that the density of interior transmission medium, sound are propagated in the duct, pipeline material density, the velocity of sound are propagated in pipe material
Degree, the absolute temperature of gas, pipe thickness, pipe roughness, correction factor set up model, sound wave characteristic in pipeline is carried out etc.
Level evaluation, is treated with a certain discrimination by rating to pipeline, adjusts systematic parameter, sound wave characteristic etc. in rational identification pipeline
Level, the position of leakage point is calculated by weight segmentation algorithm.
First purpose of the invention is to provide a kind of pipeline fluid leak detection and location system, as shown in figure 1, specific bag
Include：A set of main station system 8 and two sets or more than two sets of substation system, wherein often set substation system includes infrasonic sensor
1, pressure transmitter 2, infrasonic sensor ball valve 3, pressure transmitter ball valve 4, flowmeter 5, external power source 6, digitizer 7,
Wherein, infrasonic sensor 1 is connected with digitizer 7 by data wire, and pressure transmitter 2 passes through data wire with digitizer 7
It is connected, infrasonic sensor 1 is connected by pipeline with infrasonic sensor ball valve 3, pressure transmitter 2 is become by pipeline with pressure
Device ball valve 4 is sent to be connected, infrasonic sensor ball valve 3 and pressure transmitter ball valve 4 are connected by pipeline with main line respectively, flow
Meter 5 is connected with digitizer 7 by data wire, and external power source 6 is connected with digitizer 7 by power line.
Main station system 8 is used to receiving and processing the data that all substations are transferred to main station system 8, and is sent to each substation
Corresponding instruction, and provide all information on pipeline to operating personnel；Often in set substation, infrasonic sensor 1 is used for
The infrasound signal in main line is obtained, pressure transmitter 2 is used for obtaining the pressure signal in main line, infrasonic sensor ball
Valve 3 and pressure transmitter ball valve 4 are connected for pipeline, and flowmeter 5 is used for obtaining the data on flows in main line, external power source 6
For being powered to digitizer 7.
Second purpose of the invention is to provide a kind of pipeline fluid leak detection and location method, and its specific implementation step is such as
Under：
When systems are functioning properly, digitizer 7 gathers pipeline internal pressure force data p by pressure transmitter 2, by flow
Meter 5 gathers the data on flows Q of fluids within pipes, and infrasound data in pipeline are gathered by infrasonic sensor 1, then will collection
The pressure data p for arriving, data on flows Q, infrasound data add global positioning system (GPS) time tag, for excluding network
The influence that link delay is caused to positioning, then sends main station system 8 to by Ethernet or 3G/4G using ICP/IP protocol,
After main station system 8 receives data, evaluate formula by sound wave levels in pipeline and calculate Lnoise, passed by infrasound
Sensor gain-adjusted formula draws infrasonic sensor gain Z=5 × Lnoise, and be sent to gain Z by digitizer secondary
Sonic sensor, infrasonic sensor improves signal to noise ratio according to Z value adjust gains, leakage characteristic signal is easier identification.
Wherein, sound wave levels evaluation formula is as follows in pipeline：
Wherein
Wherein, A is correction factor, and the value is pipe roughness for 2.178, ε, and d is pipe diameter, cwFor in pipe material
The velocity of sound, ρwIt is pipeline material density, s is pipe thickness, ρFIt is the density of transmission medium in pipeline, p is manifold pressure, leads to
Over-pressed power transmitter 2 is gathered, and T is absolute temperature, and Q is pipeline instantaneous delivery, is gathered by flowmeter 5, and π is pi.
Meanwhile, setting sound wave levels Low threshold LL=400, sound wave levels high threshold LH=600.
As sound wave levels Lnoise<LLWhen, system automatically selects whether infrasound method monitoring pipeline leaks and calculate
The closest substation of leakage point apart from Sz, specific method refers to：Chen Chi etc., oil-gas field surface engineering, 2013, volume 32,
4th phase, 72-73 pages；
As sound wave levels Lnoise>LHWhen, system automatically selects whether transient model method monitoring pipeline leaks and count
Calculate leakage point to the distance between nearest substation S therewithz, specific method refers to：Meng Lingya, Beijing Jiaotong University's journal, 2008
Year, volume 32, the 3rd phase, 73-77 pages；
As sound wave levels LL≤Lnoise≤LHWhen, whether system simultaneous selection infrasound method and transient model method monitor pipeline
Leakage, only when both of which detects leakage, system can just issue leakage alarms and calculate the closest substation of leakage point
Apart from SZ=GC×SC+GS×SS, wherein, SCIt is the distance of the closest substation of leakage point calculated by infrasound method, SS
It is the distance of the closest substation of leakage point calculated by transient model method,
It is an advantage of the invention that calculating the current operating condition of pipeline, infrasonic sensor gain is actively adjusted, for improving
Signal to noise ratio, leakage characteristic signal is easier identification, and can automatically select infrasound method and (or) transient model according to sound wave characteristic
Algorithm, it is ensured that the system can accurately carry out leak judgement and positioning under different operating modes.
Brief description of the drawings
Fig. 1 is a kind of structural representation of pipeline fluid leak detection and location system that the present invention is provided.
Specific embodiment
Embodiment 1
When systems are functioning properly, digitizer 7 gathers pipeline internal pressure force data p by pressure transmitter 2, by flow
Meter 5 gathers the data on flows Q of fluids within pipes, and infrasound data in pipeline are gathered by infrasonic sensor 1, then will collection
The pressure data p for arriving, data on flows Q, infrasound data add global positioning system (GPS) time tag, for excluding network
The influence that link delay is caused to positioning, then sends main station system 8 to by Ethernet or 3G/4G using ICP/IP protocol,
After main station system 8 receives data, evaluate formula by sound wave levels in pipeline and calculate Lnoise, passed by infrasound
Sensor gain-adjusted formula draws infrasonic sensor gain Z=5 × Lnoise, and be sent to gain Z by digitizer secondary
Sonic sensor, infrasonic sensor is according to Z value adjust gains.
As sound wave levels Lnoise<LL, system automatically selects whether pipe monitored by infrasonic wave leaks, when pipeline is let out
During leakage, alarm signal is directly issued by main station system 8, and leakage point is calculated between nearest substation therewith by infrasound method
Apart from SZ。
Embodiment 2
When systems are functioning properly, digitizer 7 gathers pipeline internal pressure force data p by pressure transmitter 2, by flow
Meter 5 gathers the data on flows Q of fluids within pipes, and infrasound data in pipeline are gathered by infrasonic sensor 1, then will collection
The pressure data p for arriving, data on flows Q, infrasound data add global positioning system (GPS) time tag, for excluding network
The influence that link delay is caused to positioning, then sends main station system 8 to by Ethernet or 3G/4G using ICP/IP protocol,
After main station system 8 receives data, evaluate formula by sound wave levels in pipeline and calculate Lnoise, passed by infrasound
Sensor gain-adjusted formula draws infrasonic sensor gain Z=5 × Lnoise, and be sent to gain Z by digitizer secondary
Sonic sensor, infrasonic sensor is according to Z value adjust gains.
Work as LL≤Lnoise≤LH, whether system simultaneous selection infrasound method and transient model method monitoring pipeline leak, only when two kinds
When method all detects leakage, main station system 8 can just issue leakage alarms, at the same calculate leakage point between nearest substation therewith away from
From SZ=GC×SC+GS×SS, wherein, SCIt is the distance of the closest substation of leakage point calculated by infrasound method, SSIt is logical
The distance of the closest substation of leakage point of transient model method calculating is crossed,
Embodiment 3
When systems are functioning properly, digitizer 7 gathers pipeline internal pressure force data p by pressure transmitter 2, by flow
Meter 5 gathers the data on flows Q of fluids within pipes, and infrasound data in pipeline are gathered by infrasonic sensor 1, then will collection
The pressure data p for arriving, data on flows Q, infrasound data add global positioning system (GPS) time tag, for excluding network
The influence that link delay is caused to positioning, then sends main station system 8 to by Ethernet or 3G/4G using ICP/IP protocol,
After main station system 8 receives data, evaluate formula by sound wave levels in pipeline and calculate Lnoise, passed by infrasound
Sensor gain-adjusted formula draws infrasonic sensor gain Z=5 × Lnoise, and be sent to gain Z by digitizer secondary
Sonic sensor, infrasonic sensor is according to Z value adjust gains.
As sound wave levels Lnoise>LH, system automatically selects whether transient model method monitoring pipeline leaks, when pipeline hair
During raw leakage, alarm signal is directly issued by main station system 8, and leakage point to nearest substation therewith is calculated by transient model method
The distance between SZ。
Claims (4)
1. a kind of pipeline fluid leak detection and location system, it is characterised in that specifically include：A set of main station system (8) and two
Set or more than two sets of substation system, wherein often set substation system includes infrasonic sensor (1), pressure transmitter (2) is secondary
Sonic sensor ball valve (3), pressure transmitter ball valve (4), flowmeter (5), external power source (6), digitizer (7)；Wherein, it is secondary
Sonic sensor (1) is connected with digitizer (7) by data wire, and pressure transmitter (2) is with digitizer (7) by data wire
Be connected, infrasonic sensor (1) is connected by pipeline with infrasonic sensor ball valve (3), pressure transmitter (2) by pipeline and
Pressure transmitter ball valve (4) is connected, and infrasonic sensor ball valve (3) and pressure transmitter ball valve (4) pass through pipeline and master respectively
Pipeline is connected, and flowmeter (5) is connected with digitizer (7) by data wire, and external power source (6) is with digitizer (7) by electricity
Source line is connected.
2. a kind of pipeline fluid leak detection and location method, it is characterised in that：System described in usage right requirement 1, its is specific
Behaviour's implementation process is as follows：
Calculate acoustic wave character grade L in pipelinenoise,
Wherein
Wherein, A is correction factor, and the value is pipe roughness for 2.178, ε, and d is pipe diameter, cwIt is the sound in pipe material
Speed, ρwIt is pipeline material density, s is pipe thickness, ρFIt is the density of transmission medium in pipeline, p is manifold pressure, and T is absolute
Temperature, Q is pipeline instantaneous delivery, and π is pi；
Work as LnoiseLess than Low threshold LLWhen, whether system leaks and calculates leakage point to therewith most using infrasound method monitoring pipeline
Near sub- distance between sites；
Work as LnoiseMore than high threshold LHWhen, whether system leaks and calculates leakage point to therewith using transient model method monitoring pipeline
Nearest sub- distance between sites；
Work as LL≤Lnoise≤LH, whether system is leaked using infrasound method and transient model method monitoring pipeline simultaneously, and calculates leak source
Position SZ=GC×SC+GS×SS, wherein, SCIt is the distance of the closest substation of leakage point calculated by infrasound method, SSIt is
The distance of the closest substation of leakage point calculated by transient model method,GS=1-Gc。
3. as described in right 2, Low threshold LL=400, high threshold LH=600.
4. as described in claim 1 and 2, acoustic wave character grade L in pipelinenoise, can be used for automatically adjusting infrasonic sensor
(1) gain Z, Z=5 × Lnoise.。
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| CN201710151879.3A CN106813109A (en) | 2017-03-15 | 2017-03-15 | A kind of fluid leakage on-line monitoring and alignment system and method |
| CN201711115000.6A CN107940246B (en) | 2017-03-15 | 2017-11-13 | A kind of fluid line source of leaks monitoring and positioning system and method |
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| CN201710151879.3A CN106813109A (en) | 2017-03-15 | 2017-03-15 | A kind of fluid leakage on-line monitoring and alignment system and method |
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| CN201711115000.6A Active CN107940246B (en) | 2017-03-15 | 2017-11-13 | A kind of fluid line source of leaks monitoring and positioning system and method |
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| CN107940246A (en) * | 2017-03-15 | 2018-04-20 | 吉林省百瑞生科技发展有限公司 | A kind of fluid line source of leaks monitoring and positioning system and method |
| CN109115423A (en) * | 2018-07-23 | 2019-01-01 | 赵俊芳 | A kind of flange, weld seam, pipeline or apparatus body leak detection system and leak hunting method |
| CN109780454A (en) * | 2019-03-26 | 2019-05-21 | 三川智慧科技股份有限公司 | The selection method and device of water supply line leak point positioning equipment group |
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| JPH1090106A (en) * | 1996-09-19 | 1998-04-10 | Fuji Tecomu Kk | Leakage-searching apparatus |
| CN102032447A (en) * | 2009-09-30 | 2011-04-27 | 罗仁泽 | System for monitoring urban gas pipeline in real time and using method thereof |
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| CN105840987B (en) * | 2016-04-25 | 2018-07-13 | 北京宏信环科科技发展有限公司 | It is a kind of that localization method and device are weighted based on the pipe leakage of pressure wave and sound wave |
| CN106369289A (en) * | 2016-11-21 | 2017-02-01 | 吉林省百瑞生科技发展有限公司 | Fluid leaking on-line monitoring and positioning system |
| CN106813109A (en) * | 2017-03-15 | 2017-06-09 | 吉林省百瑞生科技发展有限公司 | A kind of fluid leakage on-line monitoring and alignment system and method |
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- 2017-03-15 CN CN201710151879.3A patent/CN106813109A/en active Pending
- 2017-11-13 CN CN201711115000.6A patent/CN107940246B/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107940246A (en) | 2018-04-20 |
| CN107940246B (en) | 2019-02-26 |
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