CN106198365A - A kind of pipeline corrosion monitoring method measured based on distributed strain - Google Patents
A kind of pipeline corrosion monitoring method measured based on distributed strain Download PDFInfo
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- CN106198365A CN106198365A CN201610487541.0A CN201610487541A CN106198365A CN 106198365 A CN106198365 A CN 106198365A CN 201610487541 A CN201610487541 A CN 201610487541A CN 106198365 A CN106198365 A CN 106198365A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
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Abstract
The invention provides a kind of pipeline corrosion monitoring method measured based on distributed strain, belong to technical field of optical fiber sensing.The hoop and the axial strain that use a kind of fiber-optic monitoring net measurement metallic conduit surface are distributed and draw hoop and axial strain cloud atlas, also and corrode the scope occurred according to the position that the corrosion of metallic conduit surface strain Distribution and localization occurs；Calculated the stress of corrosion region by the corrosion region hoop recorded and axial strain, differentiate whether corrosion region pipeline lost efficacy according to stress, strain.The invention have the advantages that, the safe condition of metallic conduit can be monitored in real time, corrosion default is positioned, obtain the scope that corrosion occurs, and directly can judge whether pipeline lost efficacy by the stress of pipeline, strain, having safe and reliable, certainty of measurement is high, the advantage lossless to structure.
Description
Technical field
The invention belongs to technical field of optical fiber sensing, relate to a kind of pipeline corrosion prison measured based on distributed strain
Survey method.
Background technology
The inefficacy that corrosion default causes is one of topmost failure mode of pipeline.Due to by pumped (conveying) medium and marine corrosion
Environmental effect, pipeline is it occur frequently that corrode.The generation of corrosion, on the one hand build-up of pressure pipeline stand under load area reduces so that pipeline
Bearing capacity declines, and easily causes pipe leakage accident under internal high pressure oil-gas reactivation；On the other hand, under load effect,
At corrosion default, produce stress concentration phenomenon, weaken the ability of pipeline resisting fatigue load.And oil and gas pipes once leaks,
Not only produce the huge wasting of resources, also the people's lives and property can be caused safely grave danger.Research corrosion default is to oil
The impact of feed channel safe transport has become pipe safety and has run one of problem of being paid close attention to.
Existing corrosive pipeline detection method such as Magnetic Flux Leakage Inspecting method, detection method of eddy, ultrasonic Detection Method etc. are carrying
Driving means intelligent detector is placed in pipeline, completes pipeline corrosion default detection.Utilize the method for detecting pipeline of existing routine
Buried pipeline is carried out periodic detection, although be obtained in that position and extent of corrosion that corrosive pipeline occurs, improve underground pipe
The safety in road, but still have many weak points, maximum deficiency is can not to monitor buried pipeline running status in real time, right
Existing corrosion needs the state of development that the detection carrying out repeating could obtain corrosion, and detection efficiency is relatively low.The most existing pipe
Road detection method can only detect the size and shape of the wall thickness of the fault location obtaining pipeline, defect mostly, and can not directly pass through
The safe condition at pipeline corrosion default is assessed in stress, the distribution of strain.In pipe, detector relates to some electrical sensors mostly,
In the detection of oil and gas pipes, inevitably there is inflammable and explosive potential safety hazard.It is thus desirable to research and develop novel pipeline
Corrosion monitoring technology.
Recently as optical fiber sensing technology successful Application in the field safety monitorings such as military affairs, aviation, bridge, optical fiber passes
Sense technology is also introduced in Monitoring Pinpelines.Optical fiber sensing technology have highly sensitive, electromagnetism interference, good endurance etc. are many
Advantage, it is possible to overcome current common detection methods that buried pipeline can only carry out the deficiency of periodic detection, and will not be to pipeline
Safety produces hidden danger.
Summary of the invention
It is an object of the invention to provide the monitoring method of a kind of metallic conduit internal corrosion.The method with do not destroy pipeline,
Premised on not affecting pipeline normal operation, by measuring the hoop on metallic conduit surface and axial stress distribution, to metal tube
The state of development of road internal corrosion is monitored, and is estimated the residual intensity of corrosion location.
Technical scheme:
A kind of pipeline corrosion monitoring method measured based on distributed strain, step is as follows:
Step 1: metallic conduit 1 outer wall pretreatment is to flat smooth, it is ensured that polyimides optical fiber 2 and metallic conduit 1 outer wall
It is fully contacted；
Step 2: first, use epoxy resin by polyimides optical fiber 2 along pipeline hoop to be equidistantly spirally pasted onto
Metallic conduit 1 outer wall, polyimides optical fiber 2 controls within 10 ° with the angle of metallic conduit 1 hoop；Again by polyimides light
Fine 2 are axially pasted onto metallic conduit surface, polyimides optical fiber 2 and metal tube with the most parallel along metallic conduit 1
Road 1 is axially in parallel；Polyimides optical fiber 2 constitutes fiber-optic monitoring net on metallic conduit 1 surface；The polyamides that axial and hoop is pasted is sub-
The spacing of amine optical fiber can need to be adjusted according to the precision drawing strain cloud atlas, and spacing is the least, and strain cloud atlas precision is the highest.
Step 3: use probe beam deflation to measure technology and carry out the measurement of metallic conduit outer wall distributed strain, by fiber-optic monitoring
Hoop strain distribution and axial strain that net records are distributed, and then are depicted as hoop strain cloud atlas and the axial strain of metallic conduit
Cloud atlas；The position occurred by hoop strain cloud atlas and axial strain cloud atlas positioning metal corrosive pipeline district and corrosion region scope；
Step 4: according to the elastic modelling quantity of metallic conduit, step 3 hoop strain of the corrosion region obtained and axial strain,
It is calculated circumference stress and the axial stress of corrosion region；For the metallic conduit under actual buried environmental condition, metallic conduit
Radial stress and radial strain is intrinsic pressure by metallic conduit and the ambient pressure of metallic conduit outer wall produces, compared to hoop and axle
Ignoring to stress, strain, therefore stress failures criterion or strain failure criteria according to metal pipeline material carry out metal
The inefficacy of pipeline judges.
Beneficial effects of the present invention: the safe condition of metallic conduit can be monitored in real time, corrosion default is carried out
Location, it is thus achieved that the scope that corrosion occurs, and directly can judge whether metallic conduit loses by the stress of metallic conduit, strain
Effect, this method has safe and reliable, and certainty of measurement is high, the advantage lossless to structure.
Accompanying drawing explanation
Fig. 1 is fiber-optic monitoring net schematic diagram.
In figure: 1 metallic conduit；2 polyimides optical fiber.
Detailed description of the invention
The detailed description of the invention of the present invention is described in detail below in conjunction with technical scheme and accompanying drawing.
Embodiment
Step 1: in order to ensure that polyimides optical fiber 2 is fully contacted with metallic conduit 1 outer surface, it is to avoid strain transfer causes
Measurement error, first by polisher, metallic conduit 1 outer surface is polished, remove skin of paint, then use rayon balls
Dip in anhydrous alcohol by burnishing part scrub.
Step 2: use epoxide-resin glue by polyimides optical fiber along metallic conduit hoop to be equidistantly spirally pasted onto
Metallic conduit outer wall, optical fiber controls within 10 ° with the angle of metallic conduit hoop；Hoop paste polyimides optical fiber it
After, then polyimides optical fiber is pasted onto metallic conduit surface, polyimides optical fiber and metal tube with the most parallel
Road is axially in parallel, along metallic conduit hoop with the polyimides optical fiber axially pasted at metallic conduit surface composition fiber-optic monitoring
Net.
Step 3: metallic conduit outer wall distributed strain is measured and used the distributed light measuring technology based on probe beam deflation
Fiber sensor system.The tunable wavelength interference technique that this measurement technology is used so that the measurement of distributed strain can be tens
Having the other spatial resolution of grade on the optical fiber that rice is long, strain testing precision is up to 1 microstrain.Metallic conduit uses process
In, the bigger pressure of internal existence, Metal pipeline corrosion causes corrosion region wall thickness to reduce, under metallic conduit internal pressure effect,
Corrosion region can produce strain and concentrate, and causes corrosion region hoop and axial strain to be more than corrosion-free district, therefore normal at metallic conduit
During operation, hoop strain distribution that fiber-optic monitoring net records and axial strain distribution is utilized to be depicted as the hoop of metallic conduit respectively
Strain cloud atlas and axial strain cloud atlas, just can position the position of corrosion generation by strain cloud atlas and obtain local corrosion generation
Scope.
Step 4: the elastic modelling quantity of metal pipeline material is known, therefore by hoop strain and the axial strain of corrosion region
With circumference stress and the axial stress that can be calculated corrosion region；For the metallic conduit under actual buried environmental condition, its
Radial stress, the ambient pressure of strain and pipeline outer wall intrinsic pressure by pipeline produce, permissible compared to hoop and axial stress, strain
Ignore.Therefore just can be according to the stress failures criterion of material or should by hoop strain, stress and axial strain, stress
Become failure criteria and carry out the inefficacy judgement of metallic conduit.
Claims (1)
1. the pipeline corrosion monitoring method measured based on distributed strain, it is characterised in that step is as follows:
Step 1: metallic conduit outer wall pretreatment is to flat smooth, it is ensured that polyimides optical fiber fully connects with metallic conduit outer wall
Touch；
Step 2: first, use epoxy resin by polyimides optical fiber along pipeline hoop to be equidistantly spirally pasted onto metal tube
Pipeline outer wall, polyimides optical fiber controls within 10 ° with the angle of metallic conduit hoop；Again by polyimides optical fiber along metal tube
Road is axially pasted onto metallic conduit surface with the most parallel, and polyimides optical fiber is axially in parallel with metallic conduit；Poly-
Acid imide optical fiber constitutes fiber-optic monitoring net on metallic conduit surface；Axially and hoop stickup polyimides optical fiber spacing according to
The precision drawing strain cloud atlas is adjusted, and spacing is the least, and strain cloud atlas precision is the highest；
Step 3: use probe beam deflation to measure technology and carry out the measurement of metallic conduit outer wall distributed strain, fiber-optic monitoring net survey
The hoop strain distribution obtained and axial strain distribution, be depicted as hoop strain cloud atlas and the axial strain cloud atlas of metallic conduit；Logical
Cross hoop strain cloud atlas and the position of axial strain cloud atlas positioning metal corrosive pipeline district generation and corrosion region scope；
Step 4: according to the elastic modelling quantity of metallic conduit, step 3 hoop strain of the corrosion region obtained and axial strain, calculate
Obtain circumference stress and the axial stress of corrosion region；For the metallic conduit under actual buried environmental condition, the footpath of metallic conduit
Intrinsic pressure by metallic conduit to stress and radial strain and metallic conduit outer wall ambient pressure produces, and compared to hoop and axially should
Power, strain are ignored, and carry out the mistake of metallic conduit according to the stress failures criterion of metal pipeline material or strain failure criteria
Effect judges.
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| CN201610487541.0A CN106198365A (en) | 2016-06-28 | 2016-06-28 | A kind of pipeline corrosion monitoring method measured based on distributed strain |
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| CN201610487541.0A CN106198365A (en) | 2016-06-28 | 2016-06-28 | A kind of pipeline corrosion monitoring method measured based on distributed strain |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478564A (en) * | 2017-06-30 | 2017-12-15 | 石家庄铁道大学 | Prestress anchorage cable corrosion damage monitoring method and device based on Fibre Optical Sensor |
| CN108345707A (en) * | 2017-01-24 | 2018-07-31 | 中国石油化工股份有限公司 | The pipeline corrosion default plan response time based on probability determines method and device |
| CN108489376A (en) * | 2018-03-13 | 2018-09-04 | 中国石油化工股份有限公司 | A kind of Monitoring Pinpelines early warning system based on distributed coax cable electricity grid strain transducer |
| CN108680488A (en) * | 2018-05-31 | 2018-10-19 | 北京市燃气集团有限责任公司 | Steel gas pipe underground corrosion detecting method above a kind of ground library |
| CN109613005A (en) * | 2018-12-20 | 2019-04-12 | 武汉隽龙科技股份有限公司 | Damage detecting method based on OFDR |
| CN110469772A (en) * | 2019-08-23 | 2019-11-19 | 重庆大学 | A kind of hydrogen cylinder non-destructive testing device and detection method |
| CN110501340A (en) * | 2019-07-31 | 2019-11-26 | 江苏卓然智能重工有限公司 | Cracking furnace tube corrosion monitoring system based on Distributed Optical Fiber Sensing Techniques |
| CN110762389A (en) * | 2019-12-03 | 2020-02-07 | 济南伊斯达自控工程有限公司 | Gas chamber inspection device capable of accurately positioning leakage point |
| CN110915081A (en) * | 2017-06-06 | 2020-03-24 | 莱尼电缆有限公司 | Intelligent corrugated hose |
| CN110925602A (en) * | 2019-11-15 | 2020-03-27 | 河海大学 | Oil and gas pipeline corrosion and leakage monitoring and early warning system and method based on OFDR optical fiber sensing |
| CN111022933A (en) * | 2019-12-31 | 2020-04-17 | 西南交通大学 | In-service pipeline girth weld defect monitoring system |
| CN111043531A (en) * | 2020-01-08 | 2020-04-21 | 兰州大学 | Intelligent optical fiber ring skin monitoring method for online diagnosis of structural damage of marine pipe |
| CN111855548A (en) * | 2020-07-21 | 2020-10-30 | 中山大学 | Monitoring probe, system and method for corrosion damage of pressure pipeline |
| CN114777026A (en) * | 2022-04-19 | 2022-07-22 | 大连理工大学 | Piezoelectric impedance intelligent corrosion ring and system for monitoring pipeline corrosion |
| CN116467857A (en) * | 2023-03-30 | 2023-07-21 | 淄博市特种设备检验研究院 | Pressure pipeline parameter inspection management system based on data processing |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108345707A (en) * | 2017-01-24 | 2018-07-31 | 中国石油化工股份有限公司 | The pipeline corrosion default plan response time based on probability determines method and device |
| CN110915081A (en) * | 2017-06-06 | 2020-03-24 | 莱尼电缆有限公司 | Intelligent corrugated hose |
| CN107478564A (en) * | 2017-06-30 | 2017-12-15 | 石家庄铁道大学 | Prestress anchorage cable corrosion damage monitoring method and device based on Fibre Optical Sensor |
| CN107478564B (en) * | 2017-06-30 | 2023-10-24 | 石家庄铁道大学 | Method and device for monitoring corrosion damage of prestressed anchor cable based on optical fiber sensing |
| CN108489376A (en) * | 2018-03-13 | 2018-09-04 | 中国石油化工股份有限公司 | A kind of Monitoring Pinpelines early warning system based on distributed coax cable electricity grid strain transducer |
| CN108680488A (en) * | 2018-05-31 | 2018-10-19 | 北京市燃气集团有限责任公司 | Steel gas pipe underground corrosion detecting method above a kind of ground library |
| CN109613005B (en) * | 2018-12-20 | 2022-03-22 | 武汉昊衡科技有限公司 | OFDR-based damage detection method |
| CN109613005A (en) * | 2018-12-20 | 2019-04-12 | 武汉隽龙科技股份有限公司 | Damage detecting method based on OFDR |
| CN110501340A (en) * | 2019-07-31 | 2019-11-26 | 江苏卓然智能重工有限公司 | Cracking furnace tube corrosion monitoring system based on Distributed Optical Fiber Sensing Techniques |
| CN110469772A (en) * | 2019-08-23 | 2019-11-19 | 重庆大学 | A kind of hydrogen cylinder non-destructive testing device and detection method |
| CN110925602B (en) * | 2019-11-15 | 2021-09-24 | 河海大学 | Oil and gas pipeline corrosion and leakage monitoring and early warning system and method based on OFDR optical fiber sensing |
| CN110925602A (en) * | 2019-11-15 | 2020-03-27 | 河海大学 | Oil and gas pipeline corrosion and leakage monitoring and early warning system and method based on OFDR optical fiber sensing |
| CN110762389A (en) * | 2019-12-03 | 2020-02-07 | 济南伊斯达自控工程有限公司 | Gas chamber inspection device capable of accurately positioning leakage point |
| CN110762389B (en) * | 2019-12-03 | 2024-10-15 | 济南伊斯达自控工程有限公司 | Gas tank inspection device capable of accurately positioning leakage point |
| CN111022933A (en) * | 2019-12-31 | 2020-04-17 | 西南交通大学 | In-service pipeline girth weld defect monitoring system |
| CN111043531A (en) * | 2020-01-08 | 2020-04-21 | 兰州大学 | Intelligent optical fiber ring skin monitoring method for online diagnosis of structural damage of marine pipe |
| CN111855548A (en) * | 2020-07-21 | 2020-10-30 | 中山大学 | Monitoring probe, system and method for corrosion damage of pressure pipeline |
| CN111855548B (en) * | 2020-07-21 | 2021-11-09 | 中山大学 | Monitoring probe, system and method for corrosion damage of pressure pipeline |
| CN114777026A (en) * | 2022-04-19 | 2022-07-22 | 大连理工大学 | Piezoelectric impedance intelligent corrosion ring and system for monitoring pipeline corrosion |
| CN116467857A (en) * | 2023-03-30 | 2023-07-21 | 淄博市特种设备检验研究院 | Pressure pipeline parameter inspection management system based on data processing |
| CN116467857B (en) * | 2023-03-30 | 2023-09-22 | 淄博市特种设备检验研究院 | Pressure pipeline parameter inspection management system based on data processing |
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Application publication date: 20161207 |