CN109185714A - The online leakage detection method of pipeline based on expert diagnosis - Google Patents
The online leakage detection method of pipeline based on expert diagnosis Download PDFInfo
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- CN109185714A CN109185714A CN201811205691.3A CN201811205691A CN109185714A CN 109185714 A CN109185714 A CN 109185714A CN 201811205691 A CN201811205691 A CN 201811205691A CN 109185714 A CN109185714 A CN 109185714A
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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
-
- 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
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Examining Or Testing Airtightness (AREA)
- Pipeline Systems (AREA)
Abstract
The invention discloses the online leakage detection methods of pipeline based on expert diagnosis, and pressure data acquisition: spot sensor data, one-to-two pass through PLC collection site pressure data；Other data of pipeline: by OPC agreement, the data in the virtual server of SCADA are read；Pipeline engineering data: distance, elevation, caliber, wall thickness, device characteristics etc.；Construct pipeline flow correction model；Construct pipeline pressure wave correction model；Construct pipeline engineering correction model；It constructs pipe leakage substantive characteristics and identifies expert system；Construct pipe leakage flow calculation model.The beneficial effects of the invention are as follows being capable of accurate automatic alarm leak position, report leakage flow, complete leakage alarm Analysis on confidence, it realizes and reduces wrong report to the maximum extent, elimination is failed to report, the accuracy of positioning accuracy and leak detection is effectively improved, the deficiency of existing leak detection technology is inherently overcome.
Description
Technical field
The invention belongs to technical field of petroleum extraction, it is related to the online leakage detection method of pipeline based on expert diagnosis.
Technical background
It is quick-fried that the leakage of petroleum, natural gas line does not only result in the loss of petroleum resources, pollution environment, or even generation fire
It is fried, seriously threaten the safety of people's lives and properties.
1. the risk of leakage of oil-gas pipeline；The main reason for causing pipeline failure to leak can be summarized as 5 aspects:
1. it includes: mechanical damage caused by third party (unintentional) that external force, which damages external force damage, traffic above-ground factor causes
Fatigue failure, Strength Failure caused by natural calamity (such as earthquake, landslide, Loess Collapsibility, flood erosion) etc..
2. corrosion failure cause to corrode outside pipeline because being known as: manage corrosivity, the pipe external anti-corrosion layer quality, electrical method of outer soil
Protecting effect, stray electrical current interference, pipe local stress state etc..With the extension of pipe service time, soil along pipeline
Corrosivity can change, external anti-corrosion layer quality can also decline, and electrical method Protection parameters need to adjust accordingly.
The defects of 3. material and constructional deficiency steel pipe base material are during the rolling process, inevitably retain crackle；Guan
In tubulation, transport, welding and work progress, also inevitably mechanically damaged, bead crack, slag inclusion, welding fault
The defects of.The defect left during in-pipe inspection robot pressure testing is acted on by pipeline pressure, can constantly be expanded during pipeline is on active service
Exhibition, growth, lead to pipeline failure.
4. maloperation maloperation has equipment to control reason caused by failure, also there is operator to be unable to strict implement operation rule
The accident of Cheng Yinfa.Design fault can also lead to pipeline failure accident, if pipe material selection is unreasonable, pipeline or equipment protection logic
It is unreasonable etc..
5. a lot of artificial drilling hole of oil stolen destructive insidents had occurred in drilling hole of oil stolen on China's oil-gas pipeline in recent years.
There are many methods and techniques for detecting pipe leakage, for oil-gas pipeline, since conduit running disturbance factor is more, at present
Leakage detection method mostly in the presence of detection rate of false alarm it is high, positioning accuracy is not high and there is the shortcomings that failing to report.
The leakage feature of pipeline:
(1) pipe leakage can cause pressure to decline, and generate transient flow.Leak pressure wave can along pipeline from leakage light to
It propagates in upstream and downstream direction；
(2) leak pressure wave can generate decaying during pipe transmmision；
(3) disturbance during conduit running can also generate transient pressure fluctuation, and disturbance transient pressure can also be passed along pipeline
It broadcasts, causes to report by mistake；Disturbance transient pressure can be superimposed with leakage transient pressure, and stack result makes leakage signal deform, and causes
It reports by mistake, fail to report and position inaccurate.
Summary of the invention
The purpose of the present invention is to provide the online leakage detection method of pipeline based on expert diagnosis, beneficial effects of the invention
Fruit is accurately automatic alarm leak position, report leakage flow to complete leakage alarm Analysis on confidence, realize maximum limit
Degree ground reduces wrong report, and elimination fails to report, effectively improves the accuracy of positioning accuracy and leak detection, inherently overcome existing let out
The deficiency of missing inspection survey technology.
The technical solution adopted in the present invention is as follows:
1. on-site data gathering；
(1) pressure data acquires: spot sensor data, one-to-two pass through PLC collection site pressure data；
(2) by OPC agreement, the data in the virtual server of SCADA other data of pipeline: are read；
(3) pipeline engineering data: distance, elevation, caliber, wall thickness, device characteristics etc.；
2. data processing；
3. the online leakage detection method of pipeline；
(1) pipeline flow correction model is constructed；
(2) pipeline pressure wave correction model is constructed；
(3) pipeline engineering characteristic revision model is constructed；
(4) building pipe leakage substantive characteristics identifies expert system；
(5) pipe leakage flow calculation model is constructed.
Wherein, the method for the present invention further include:
1. the online leak detection automatic positioning of conduit running process, alarm based on expert diagnosis；
2. the online leak detection automatic positioning of stopping transportation segment pipe, alarm based on expert diagnosis；
3. the stopping transportation pipeline based on expert diagnosis draws the online leak detection automatic positioning of dead band, alarm；
4. the moment occurs for the report leakage based on expert diagnosis；
5. the report based on expert diagnosis leaks instantaneous flow (can determine whether leakage accident severity)；
6. the Analysis on confidence of the report leakage alarm based on expert diagnosis；
7. the report leakage point two sides block valve for pipeline door emergency based on expert diagnosis closes valve suggestion；
8. pressure at two ends is implemented between the leakage station based on expert diagnosis and historical trend shows, stores.
Integrated application pipeline transportation process of the present invention and pipeline engineering theory, many years oil pipeline research achievement and operation warp
Accumulation is tested, Transportation Process is combined with instrument profession, is that pipeline is customized, is established the expert of pipeline on-line intelligence leak diagnostics
System (including pressure wave, hypsography and flow equilibrium amendment, the diagnosis of pipe leakage substantive characteristics and identification etc.)；When pipeline is sent out
When raw leakage, comprehensive descision, analysis, the intrinsic substantive characteristics for screening leakage variation, leak source both ends from the Parameters variation of detection
The corresponding relationship of substantive characteristics is leaked, non-leakage information caused by disturbing is rejected；Judge whether to leak, accurate automatic alarm
Leakage flow is reported in leak position, completes leakage alarm Analysis on confidence, realizes and reduces wrong report to the maximum extent, eliminates leakage
Report, effectively improves the accuracy of positioning accuracy and leak detection, inherently overcomes the deficiency of existing leak detection technology, make
It is more perfect and mature to obtain the technology.
Detailed description of the invention
Fig. 1 is that good fortune refines southern line processed oil pipeline yard distribution schematic diagram；
Fig. 2 is that multiple line crude oil pipeline yard distribution schematic diagram is faced in east；
Fig. 3 is Zhejiang, Taiwan and Wenzhou processed oil pipeline yard distribution schematic diagram.
Specific embodiment
The present invention is described in detail With reference to embodiment.
The leak test 1. good fortune refining southern line processed oil pipeline scene is drained the oil
Good fortune refines southern line processed oil pipeline, and 162 kilometers of overall length, caliber 457mm, 355mm, completely 4 stations, are equipped with initial station, 1
Intermediate pigging station, 1 branch line point defeated station, main line terminal is inspired confidence in east；Divide defeated branch line and the mountain Shi Hu branch line terminal.
Fig. 1 good fortune refines southern line processed oil pipeline yard distribution schematic diagram
2 main pump conveying diesel oil, pipeline throughput rate 640m3/hr are opened in the 13:00 on the 26th of September in 2014, spring port initial station.It is suitable in pipe
Sequence conveys oil and gasoline, and contaminated product initially contacts 107 kilometers of identity distance initial station.19:27:15, east inspire confidence in terminal and start to download contaminated product；
Terminal stopping transportation is inspired confidence in 19:29:20, east, and oil transportation switches to the branch line oil transportation of the mountain Shi Hu, completely manages at this time interior full of diesel oil.In September, 2014
Start test of draining the oil at away from initial station 89.8km in the afternoon on the 26th.It is equal through (operation and stopping transportation) 9 tests of draining the oil, software two days later
The accurate automatic alarm of energy, nothing are failed to report；
(1) the average value 1.008km of 9 deviations absolute values of draining the oil；
(2) the design discharge of minimum detection leakage flow 0.494%；
(3) the average value 14.48% of 9 absolute value of the bias of draining the oil；
(4) test process is failed to report without wrong report, nothing；
(5) during testing, every 20 days were reported by mistake away from last time, are not reported by mistake.
It drains the oil leak test 2. multiple line crude oil pipeline scene is faced in east
Multiple line crude oil pipeline is faced in east, 157 kilometers of overall length, caliber 630mm, 711mm, is completely equipped with initial station, 3 intermediate pump stations
With Linyi terminal；Shore south coming oil is in Binzhou station flow in pipes.
Fig. 2 faces in east multiple line crude oil pipeline yard distribution schematic diagram
On October 12nd, 2016, east face 4 station of multiple line and open pump, and shore south coming oil enters the station flow in pipes at Binzhou station, manage in sequence
Convey import light crude oil and triumph mixed crude；Contaminated product head initially contacts identity distance initial station 87km, pipeline throughput rate 2600m3/hr.
On October 12nd, 2016,8:35 started test of draining the oil at away from initial station 54km.By 1 day time, 14 tests of draining the oil, software
The accurate automatic alarm of energy, nothing are failed to report；
(1) the average value 1.179km of 14 deviations absolute values of draining the oil；
(2) the design discharge of minimum detection leakage flow 0.3%；
(3) alarm leakage instantaneous flow, the alarm average value of flow and variable absolute value of the bias of draining the oil for 14 times is 21%；
(4) 2 months error-alert degree statistics, all fronts false alarm are 1 time/4.7 days average；
(5) test process is failed to report without wrong report, nothing；
The leak test 3. Zhejiang, Taiwan and Wenzhou processed oil pipeline scene is drained the oil
Zhejiang, Taiwan and Wenzhou processed oil pipeline, 405 kilometers of overall length, caliber 457,407,323mm are completely equipped with initial station, 2 centres point
Defeated pumping plant, 1 reducing pipe cleaning station and Ruian terminal.
The Zhejiang, Taiwan and Wenzhou Fig. 3 processed oil pipeline yard distribution schematic diagram
On July 16th, 2018, Zhejiang, Taiwan and Wenzhou pipeline all fronts stopping transportation, pipe is interior to be full of diesel oil.July 16,17 days, 19 in 2018
Day, in the block valve for pipeline position away from upstream pumping unit 82.7km, 86.6km and 109km, implement test of draining the oil.By 3 day time,
8 tests of draining the oil, the software accurate automatic alarm of energy, nothing are failed to report；Without wrong report.
(1) drain the oil for 8 times and be automatically positioned the average value 0.45km of absolute value of the bias；
(2) the design discharge of minimum detection leakage flow 0.23%；
(3) test process is failed to report without wrong report, nothing.
The above is only not to make limit in any form to the present invention to better embodiment of the invention
System, any simple modification that embodiment of above is made according to the technical essence of the invention, equivalent variations and modification,
Belong in the range of technical solution of the present invention.
Claims (2)
1. the online leakage detection method of pipeline based on expert diagnosis, it is characterised in that:
1. on-site data gathering；
(1) pressure data acquires: spot sensor data, one-to-two pass through PLC collection site pressure data；
(2) by OPC agreement, the data in the virtual server of SCADA other data of pipeline: are read；
(3) pipeline engineering data: distance, elevation, caliber, wall thickness, device characteristics；
2. data processing；
3. the online leakage detection method of pipeline；
(1) pipeline flow correction model is constructed；
(2) pipeline pressure wave correction model is constructed；
(3) pipeline engineering correction model is constructed；
(4) building pipe leakage substantive characteristics identifies expert system；
(5) pipe leakage flow calculation model is constructed.
2. according to the online leakage detection method of pipeline described in claim 1 based on expert diagnosis, it is characterised in that further include:
1. the online leak detection automatic positioning of conduit running process, alarm based on expert diagnosis；
2. the online leak detection automatic positioning of stopping transportation segment pipe, alarm based on expert diagnosis；
3. the stopping transportation pipeline based on expert diagnosis draws the online leak detection automatic positioning of dead band, alarm；
4. the moment occurs for the report leakage based on expert diagnosis；
5. the report based on expert diagnosis leaks instantaneous flow (can determine whether leakage accident severity)；
6. the Analysis on confidence of the report leakage alarm based on expert diagnosis；
7. the report leakage point two sides block valve for pipeline door emergency based on expert diagnosis closes valve suggestion；
8. pressure at two ends is implemented between the leakage station based on expert diagnosis and historical trend shows, stores.
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| CN201811205691.3A CN109185714A (en) | 2018-10-17 | 2018-10-17 | The online leakage detection method of pipeline based on expert diagnosis |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113405741A (en) * | 2021-06-23 | 2021-09-17 | 中冶焦耐(大连)工程技术有限公司 | Leakage detection system and diagnosis method for coke dry quenching primary dedusting cooling system |
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| CN113405741A (en) * | 2021-06-23 | 2021-09-17 | 中冶焦耐(大连)工程技术有限公司 | Leakage detection system and diagnosis method for coke dry quenching primary dedusting cooling system |
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Application publication date: 20190111 |