CN105864642A - Novel pipeline leakage detecting device and method - Google Patents

Novel pipeline leakage detecting device and method Download PDF

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Publication number
CN105864642A
CN105864642A CN201610394009.4A CN201610394009A CN105864642A CN 105864642 A CN105864642 A CN 105864642A CN 201610394009 A CN201610394009 A CN 201610394009A CN 105864642 A CN105864642 A CN 105864642A
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CN
China
Prior art keywords
pipeline
pressure
pressure transducer
leakage
gauge
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CN201610394009.4A
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Chinese (zh)
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CN105864642B (en
Inventor
林培锋
廖江
崔宝玲
林哲
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浙江理工大学
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Priority to CN201610394009.4A priority Critical patent/CN105864642B/en
Publication of CN105864642A publication Critical patent/CN105864642A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17DPIPE-LINE SYSTEMS; PIPE-LINES
    • F17D5/00Protection or supervision of installations
    • F17D5/02Preventing, monitoring, or locating loss

Abstract

The invention discloses a novel pipeline leakage detecting device and method. Three equalizing pipes are installed along a pipeline and each provided with a pressure sensor, the pressure sensors are the first pressure sensor, the second pressure sensor and the third pressure sensor in the flowing direction of liquid, and data is collected by the three pressure sensors to detect sound velocity in the pipeline and leakage positions; a first flowmeter and a second flowmeter are arranged on the first pressure sensor and the third pressure sensor along the portion, on an inlet of liquid flowing direction, of the pipeline respectively, the two flowmeters collect data to preliminarily judge whether leakage occurs or not, the three pressure sensors collect data in real time to finally judge whether leakage occurs, and pressure wave velocity in the pipeline and the position of pipeline leakage are obtained through calculation. Local sound velocity can be calibrated, pipeline leakage can be detected, small leakage can be detected, local sound velocities under different working conditions are measured, the false alarm rate caused by pump and valve adjustment is reduced, location accuracy of pipeline leakage is improved, and the novel pipeline leakage detecting device and method are of important significance in energy conservation and environment protection.

Description

A kind of novel pipeline leak detecting device and detection method
Technical field
The present invention relates to a kind of detection device and detection method, related to a kind of novel pipeline leak detecting device and detection method, can local velocity of sound in calibration pipeline, reduce leakage false alarm, improve leakage positioning precision.
Background technology
Pipeline transportation is listed as five big traffic means of transportation with railway transportation, highway transportation, water-borne transport and air transportation, has the advantage of uniqueness at aspects such as conveying liquid, gas, slurries.Along with developing rapidly of Chinese national economy, pipeline transportation and large-scale refitting equipment role in economic development are more and more important.But along with increasing and the growth of operation hours of pipeline, tube wall is due to reasons such as constructional deficiency, erosion corrosion and artificial destructions, and pipeline leakage accident occurs again and again.
December in 2009 morning on the 30th, CNPC orchid Zheng long processed oil pipeline Weinan branch line finds that massive diesel-fuel leaks into Chishui River, in entrance the Yellow River, formation contaminated zone, the Weihe River, causes the Yellow River to pollute.Night on May 17th, 2016, general headquarters be positioned at Li Guliya great Qu Bu Sala mineral oil processing Pi Yemengte industrial group underground oil pipeline rupture, cause 550 tons of crude oil leakages, wherein have 50 tons inflow surrounding waters.
At present, the device of great majority detection pipe leakage is all difficult to arriving of detection for the generation of tiny leakage event, and the velocity of sound is used the most at large to existing constant value, and in reality the velocity of sound can along with temperature, the change of the factors such as the percentage ratio of air in pipeline and change.
Summary of the invention
In order to the generation of tiny leakage event be detected, economize on resources, protect environment, improve the precision of leakage location.The present invention proposes a kind of novel pipeline leak detecting device and detection method, thus meet the requirement of detection tiny leakage, on the premise of satisfied detection tiny leakage requires, demarcate local velocity of sound, reduce by adjusting pump to adjust the false alarm rate that valve causes, improve the positioning precision of pipe leakage.
The technical solution used in the present invention is:
One, a kind of novel pipeline leak detecting device:
The pipeline including centrifugal pump, being connected to outlet of centrifugal pump and the first electric control valve being arranged at outlet of centrifugal pump on pipeline, it is also equipped with three balance pipes along pipeline, each it is mounted on a pressure transducer for hydraulic pressure in detecting pipeline in pressure pipe, three pressure transducers flow to be respectively the first pressure transducer, the second pressure transducer and the 3rd pressure transducer along liquid, are detected pipeline leakage position by the pressure data of the first pressure transducer, the second pressure transducer and the 3rd pressure transducer collection;The pipeline that first pressure transducer flows to entrance along liquid is provided with first-class gauge, the pipeline that 3rd pressure transducer flows to outlet along liquid is provided with second gauge, by the data on flows of first-class gauge and second gauge collection, Leak Detection result is modified, reduces and adjust pump to adjust the false alarm rate that valve causes.
The present invention uses balance pipe to install pressure transducer, and balance pipe can play the effect of gentle pressure, such that it is able to improve the sensitivity for tiny leakage detection.
Having air vent on described balance pipe, air vent communicates with pipeline, and air vent is for discharging the air in balance pipe and pipeline, it is simple to discharged by the air in balance pipe before experiment test.
Having sensor installation port on described balance pipe, the first pressure transducer, the second pressure transducer and the 3rd pressure transducer use to threaded with sensor installation port and fix.
The first described pressure transducer and first-class gauge are installed in pipeline input end, the 3rd described pressure transducer and second gauge are arranged on pipeline outfan end, and the second pressure transducer is arranged between the first pressure transducer and the 3rd pressure transducer.
Two, a kind of novel pipeline leakage detection method, uses described detection device, specifically includes following steps:
1) data on flows gathered by first-class gauge and second gauge tentatively judges whether pipeline there occurs leakage;
2), after tentatively judging that pipeline is revealed, judge the most whether pipeline is revealed again by pressure data everywhere on the first pressure transducer, the second pressure transducer and the 3rd pressure transducer Real-time Collection pipeline;
3) position at the pressure velocity of wave obtaining in pipeline and pipe leakage is calculated after determining leakage by the pressure data of pressure transducer Real-time Collection.
When valve opening minimizing or termination of pumping, the pressure that first pressure transducer and the 3rd pressure transducer collect all can reduce, and when leakage occurs, the pressure that first pressure transducer and the 3rd pressure transducer collect the most all can reduce, and the most just the change of force value by collecting cannot judge whether pipeline there occurs leakage.Therefore, in abovementioned steps, by the data on flows of described first-class gauge and second gauge collection, Leak Detection result is modified.
When the first electric control valve valve opening minimizing, termination of pumping or leakage, the change of its value of flow that first-class gauge and second gauge are collected is different.When the first electric control valve valve opening minimizing or termination of pumping, the flow that first-class gauge and second gauge are gathered is all to reduce, when leakage occurs, the flow that first-class gauge is collected is to increase, and the flow that second gauge is collected is to reduce, such that it is able to judge whether pipeline there occurs leakage.On the one hand first-class gauge and second gauge can play the effect of detection leakage, on the other hand can reduce owing to adjusting pump to adjust the false alarm rate that valve causes.
Described step 1) specifically: if the data on flows that data on flows raises and described second gauge collects that described first-class gauge collects reduces, then it is assumed that tentatively judge that pipeline there occurs leakage, the most do not reveal.
Described step 2) specifically in step 1) tentatively judge that pipeline is revealed on the basis of, if the pressure data that described first pressure transducer and described 3rd pressure transducer collect all reduces, then judge that pipeline finally there occurs leakage, the most do not reveal.
By pressure data everywhere on described first pressure transducer, the second pressure transducer and the 3rd pressure transducer Real-time Collection pipeline, according to distance x between the second pressure transducer and the 3rd pressure transducer, use below equation to calculate the pressure velocity of wave v obtained in pipeline and (be equivalent to local velocity of sound, refer to the speed that sound is propagated in a liquid), to improve positioning precision:
v = x t 2 - t 1
Wherein, t1 and t2 represents that the pressure wave produced at pipe leakage arrives the second pressure transducer and the time of the 3rd pressure transducer respectively, and v is the pressure velocity of wave in pipeline;
Then the position at employing below equation calculating acquisition pipe leakage:
X1=v × (t2-t3)
Wherein, x1 is the leak distance to first sensor, i.e. position at pipe leakage, and t3 is the time that the pressure wave produced at pipe leakage arrives the first pressure transducer.
The invention have the advantages that:
The present invention improves the sensitivity for tiny leakage detection, reduce because adjusting pump to adjust the false alarm rate that causes of valve, it is to avoid the waste of resource, but also proposes demarcation local velocity of sound, thus improves the positioning precision of pipeline leakage testing.Uniformly have air vent on pipe thus improve the accuracy measuring manifold pressure value.
The present invention has simple in construction, advantage with low cost and easy to install.
The present invention can meet the demand in the field such as oil, chemical industry.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of experimental provision of the present invention.
Fig. 2 is the tomograph of balance pipe of the present invention.
In figure: 1. centrifugal pump, 2. the first electric control valve, first-class gauge, 4. the first pressure transducer, 5. leak, 6. the second pressure transducer, 7. the 3rd pressure transducer, 8. second gauge, 9. pipeline, 10. motorized needle valve, 11. second electric control valves, 12. balance pipes, 12.1 air vents, 12.2 sensor installation ports.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Concrete emulation embodiment and the implementation process thereof of the present invention be:
In being embodied as, pipeline 9 is offered leak 5, motorized needle valve 10 and the second electric control valve 11 are installed at leak 5, motorized needle valve 10 is used for controlling the size of leakage rate, second electric control valve 2 is used for controlling i.e. opening of leak and i.e. closes, and the second electric control valve 11 and motorized needle valve 10 are threaded connection fixing.
Equipped with the first pressure transducer 4 at 1m before small opening 5, equipped with the second pressure transducer 6 at 1m after leak 5, equipped with the 3rd pressure transducer 7 at 100m after leak.By observing first-class gauge, the first pressure transducer, the 3rd pressure transducer and the change in value of second gauge, it can be determined that whether pipeline leaks, thus reduce because adjusting pump to adjust the false alarm rate that valve causes.The second pressure transducer and time t1 and t2 of the 3rd pressure transducer is arrived separately at by measuring the signal that sends of leak, and the second pressure transducer and distance x of the 3rd pressure transducer, local velocity of sound can be demarcated, thus improve the precision of location.As can be seen from Table 1, after using new pipeline leakage testing device, the precision of its location improves, and the leakage that especially leakage rate is less, its positioning precision has had significant raising.By the pressure oscillation in the mild pipeline of balance pipe, thus improve the sensitivity for tiny leakage detection.
Table 1: use the positioning result after new leak detecting device to contrast
As can be seen here it is contemplated that demarcate local velocity of sound, reduce because adjusting pump to adjust the false alarm rate that valve causes, improve the sensitivity for tiny leakage detection.The present invention is for saving the energy, protecting environment to have the most great meaning.

Claims (8)

1. a novel pipeline leak detecting device, including centrifugal pump (1), is connected to centrifugal pump (1) and goes out Mouthful pipeline (9) and the first electric control valve (2) of being arranged on centrifugal pump (1) exit pipeline (9), It is characterized in that: be also equipped with three balance pipes (12), each pressure pipe (12) along pipeline (9) upper all Being provided with a pressure transducer for hydraulic pressure in detecting pipeline (9), three pressure transducers are along liquid stream To the respectively first pressure transducer (4), the second pressure transducer (6) and the 3rd pressure transducer (7), Gathered by the first pressure transducer (4), the second pressure transducer (6) and the 3rd pressure transducer (7) Pressure data to pipeline (9) reveal position detect;First pressure transducer (4) flows to along liquid The pipeline (9) of entrance is provided with first-class gauge (3), and the 3rd pressure transducer (6) flows to out along liquid The pipeline (9) of mouth is provided with second gauge (8), by first-class gauge (3) and second gauge (8) Leak Detection result is modified by the data on flows gathered.
A kind of novel pipeline leak detecting device the most according to claim 1, it is characterised in that: described Balance pipe (12) on have air vent (12.1), air vent (12.1) communicates with pipeline (9), row QI KOU (12.1) is for discharging the air in balance pipe (12) and pipeline (9).
A kind of novel pipeline leak detecting device the most according to claim 1, it is characterised in that: described Balance pipe (12) on have a sensor installation port (12.2), the first pressure transducer (4), the second pressure Force transducer (6) and the 3rd pressure transducer (7) use with sensor installation port (12.2) threaded solid Fixed.
A kind of novel pipeline leak detecting device the most according to claim 1, it is characterised in that: described The first pressure transducer (4) and first-class gauge (3) be installed in pipeline (9) input end, institute The 3rd pressure transducer (7) stated and second gauge (8) are arranged on pipeline (9) outfan end.
5. a novel pipeline leakage detection method, it is characterised in that described in employing Claims 1 to 4 is arbitrary Detection device, specifically includes following steps:
1) data on flows gathered by first-class gauge (3) and second gauge (8) tentatively judges pipe Whether road (9) there occurs leakage;
2) after tentatively judging that pipeline is revealed, by the first pressure transducer (4), the second pressure sensing On device (6) and the 3rd pressure transducer (7) Real-time Collection pipeline, pressure data everywhere judges pipeline (9) again Finally whether reveal;
3) calculated by the pressure data of pressure transducer (7) Real-time Collection after determining leakage and obtain pipeline (9) Position at interior pressure velocity of wave and pipe leakage.
A kind of novel pipeline leakage detection method the most according to claim 5, it is characterised in that: described Step 1) specifically: if the data on flows that described first-class gauge (3) collects raises and described second The data on flows that gauge (8) collects reduces, then it is assumed that tentatively judge that pipeline (9) there occurs leakage, no The most do not reveal.
A kind of novel pipeline leakage detection method the most according to claim 5, it is characterised in that: described Step 2) specifically in step 1) tentatively judge that pipeline is revealed on the basis of, if described first pressure sensing The pressure data that device (4) and described 3rd pressure transducer (7) collect all reduces, then judge that pipeline is There occurs leakage eventually, the most do not reveal.
A kind of novel pipeline leakage detection method the most according to claim 5, it is characterised in that: pass through Described first pressure transducer (4), the second pressure transducer (6) and the 3rd pressure transducer (7) are real-time Gather pressure data everywhere on pipeline, according to the second pressure transducer (6) and the 3rd pressure transducer (7) Between distance x, use below equation to calculate the pressure velocity of wave v obtained in pipeline, to improve positioning precision:
v = x t 2 - t 1
Wherein, t1 and t2 represents that the pressure wave produced at pipe leakage arrives the second pressure transducer (6) respectively With the time of the 3rd pressure transducer (7), v is the pressure velocity of wave in pipeline;
Then the position at employing below equation calculating acquisition pipe leakage:
X1=v × (t2-t3)
Wherein, x1 is the leak distance to first sensor (4), and t3 is the pressure produced at pipe leakage Reeb arrives the time of the first pressure transducer (4).
CN201610394009.4A 2016-06-06 2016-06-06 A kind of pipeline leakage testing device and detection method CN105864642B (en)

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CN106368728A (en) * 2016-11-30 2017-02-01 四川有色金砂选矿药剂有限公司 Air supply device for mines
CN107121244A (en) * 2017-04-10 2017-09-01 兰州大学 A kind of device and its detection method for detecting pyrometallurgical smelting spray gun water cooling safe practice
CN107748273A (en) * 2017-09-29 2018-03-02 中国石油大学(华东) A kind of pipeline pressure wave velocity testing device and method based on casing experimental loop
CN107817077A (en) * 2017-09-30 2018-03-20 上海邦芯物联网科技有限公司 A kind of pipeline sound velocity determination system and method
CN108036201A (en) * 2017-12-21 2018-05-15 廊坊市蓝德采油技术开发有限公司 A kind of Leak Detection in Oil Pipeline Using method based on negative pressure wave method and traffic trends method
CN108490804A (en) * 2018-02-08 2018-09-04 天津大学 Pipeline minute leakage detectability appraisal procedure under a kind of complex environment
CN108954021A (en) * 2018-08-25 2018-12-07 北京逸智联科技有限公司 A kind of municipal network water supply monitoring system
CN109185714A (en) * 2018-10-17 2019-01-11 张雪 The online leakage detection method of pipeline based on expert diagnosis
CN110118307A (en) * 2019-04-16 2019-08-13 中广核工程有限公司 A kind of nuclear power plant's small pipeline leak detecting device and its detection method
CN110243557A (en) * 2019-06-14 2019-09-17 国家能源投资集团有限责任公司 Pipe detection system, boiler components and method for detecting pipeline

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106368728A (en) * 2016-11-30 2017-02-01 四川有色金砂选矿药剂有限公司 Air supply device for mines
CN107121244A (en) * 2017-04-10 2017-09-01 兰州大学 A kind of device and its detection method for detecting pyrometallurgical smelting spray gun water cooling safe practice
CN107748273A (en) * 2017-09-29 2018-03-02 中国石油大学(华东) A kind of pipeline pressure wave velocity testing device and method based on casing experimental loop
CN107748273B (en) * 2017-09-29 2019-12-20 中国石油大学(华东) Pipeline pressure wave velocity testing device and method based on pipe flow test loop
CN107817077A (en) * 2017-09-30 2018-03-20 上海邦芯物联网科技有限公司 A kind of pipeline sound velocity determination system and method
CN108036201A (en) * 2017-12-21 2018-05-15 廊坊市蓝德采油技术开发有限公司 A kind of Leak Detection in Oil Pipeline Using method based on negative pressure wave method and traffic trends method
CN108490804A (en) * 2018-02-08 2018-09-04 天津大学 Pipeline minute leakage detectability appraisal procedure under a kind of complex environment
CN108954021A (en) * 2018-08-25 2018-12-07 北京逸智联科技有限公司 A kind of municipal network water supply monitoring system
CN109185714A (en) * 2018-10-17 2019-01-11 张雪 The online leakage detection method of pipeline based on expert diagnosis
CN110118307A (en) * 2019-04-16 2019-08-13 中广核工程有限公司 A kind of nuclear power plant's small pipeline leak detecting device and its detection method
CN110118307B (en) * 2019-04-16 2020-11-03 中广核工程有限公司 Small-sized pipeline leakage detection device and detection method for nuclear power plant
CN110243557A (en) * 2019-06-14 2019-09-17 国家能源投资集团有限责任公司 Pipe detection system, boiler components and method for detecting pipeline

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