CN108050394A - Fuel gas pipeline leakage based on sound pressure signal identification detects positioning experiment platform - Google Patents

Fuel gas pipeline leakage based on sound pressure signal identification detects positioning experiment platform Download PDF

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Publication number
CN108050394A
CN108050394A CN201711291102.3A CN201711291102A CN108050394A CN 108050394 A CN108050394 A CN 108050394A CN 201711291102 A CN201711291102 A CN 201711291102A CN 108050394 A CN108050394 A CN 108050394A
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China
Prior art keywords
simulation
pipeline
leakage
fuel gas
pressure
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CN201711291102.3A
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CN108050394B (en
Inventor
游赟
罗明伟
梁平
李琳
李凤
秦正山
周建良
段枷亦
李梦莹
付显朝
谢晶
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Chongqing University of Science and Technology
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Chongqing University of Science and Technology
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Classifications

    • 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
    • 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
    • F17D5/06Preventing, monitoring, or locating loss using electric or acoustic means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/007Leak detector calibration, standard leaks
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/24Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations
    • G01M3/243Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations for pipes
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/28Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
    • G01M3/2807Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
    • G01M3/2815Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements

Abstract

The present invention provides a kind of fuel gas pipeline leakages based on sound pressure signal identification to detect positioning experiment platform, including simulation fuel gas transmission pipe network, simulated leakage device, medium conveying apparatus, sound pressure signal detection device;Two simulated leakage devices are set on every simulation pipeline of simulation fuel gas transmission pipe network, and pipe leakage process is simulated respectively by the combination of proportioning valve and flowmeter;Sonic sensor, differential pressure pickup, pressure sensor, temperature sensor on every simulation pipeline detect acoustic signals, pressure difference signal, pressure signal, the temperature signal that leakage generates respectively, it is gathered by data collecting card and passes to computer and analyzed, calculate pipe leakage position.The present invention can simulate a variety of leakage operating modes, it can realize fuel gas pipeline leakage detection and the positioning experiment simulated under a variety of leakage operating modes, experimental Research on Reliability is provided for fuel gas pipeline leakage detection and location technology, advantageously reduces true pipe leakage rate of false alarm and rate of failing to report.

Description

Fuel gas pipeline leakage based on sound pressure signal identification detects positioning experiment platform
Technical field
The present invention relates to a kind of research experiments platforms, are specially a kind of fuel gas pipeline leakage inspection based on sound pressure signal identification Survey positioning experiment platform.
Background technology
City gas pipe network system is important urban infrastructure, is provided generally for the production and living of town dweller Public service.With city gas use become increasingly popular, the continuous development of gas ductwork, because the corrosion failure of pipeline, Gas leakage event happens occasionally caused by damage from third-party and artificial origin etc., not only brings huge economic loss and ring It pollutes in border, it is also possible to bring great personnel casualty accidents.
The method that most civil gas management companies mainly use in city gas leak detection at this stage is to natural Gas adds smelly, and the methods of being judged by field observation or using leakage survey of gas network instrument finds leak source.This pipeline leakage testing and The method of positioning has significant limitation in practical applications, is mainly shown as:First, geographical location residing for steel gas pipe underground It is complicated with ambient enviroment, it is unintelligible to be easy to cause smell, it is difficult to accurate to differentiate;2nd, off-odor caused by gas leakage needs It is artificial to judge, it can not realize the rapidity and accuracy of pipe leakage positioning;3rd, it is difficult to that damage from third-party accident is accomplished to shift to an earlier date Early warning.In order to facilitate research gas pipeline operation characteristic, feature and mechanism and practical quick leakage detection method are leaked, It is necessary to research and develop the experimental provision of a set of simulation fuel gas pipeline leakage detection positioning to carry out scientific research, realize and Gas Pipe is occurring Information can be fast and accurately obtained during road leakage accident and confirms leak source, timely and effectively to implement emergency management and rescue, maximum limit Degree ground containment gas accidents generation and caused by damage.
At present, the research in terms of city gas leak detection both at home and abroad is rare to test mainly based on theory analysis Card is limited to the actual conditions of current each research institutions, and the experimental study of pipeline leakage testing positioning is very few, on the one hand existing reality It is also mostly, which to test platform, is tested for liquid, and experiment is rougher, and simulated leakage process and real process deviation are larger.On the other hand Existing experimental bench is mostly straight pipeline experimental bench simple in structure, by the form of direct perforate on valve or pipeline come simulated leakage Process, this analoglike pipeline can not simulate complicated conduit running operating mode, incomplete additionally, due to data collecting system, to simulation The measure of pipeline Sudden Leakage situation, error are larger.Therefore, the reality positioned by researching and developing a set of simulation fuel gas pipeline leakage detection Experiment device can make up the current domestic deficiency studied in terms of town gas pipe leak detection, to gas pipeline is promoted to examine safely Looking into technology development has real value and science innovation.
The content of the invention
For in the prior art the defects of, the present invention provide it is a kind of based on sound pressure signal identification fuel gas pipeline leakage detection Positioning experiment platform can simulate the different leakage operating modes of pipelines, and data collecting system is perfect, and pipe leakage position is determined Level is true, and reliable experimental study is provided for fuel gas pipeline leakage detection positioning.
Technical solution of the present invention is as follows:
A kind of fuel gas pipeline leakage based on sound pressure signal identification detects positioning experiment platform, and key is:Including mould Intend fuel gas transmission pipe network, simulated leakage device, medium conveying apparatus, sound pressure signal detection device;
The simulation fuel gas transmission pipe network is made of the simulation pipeline networking of three different-diameters, simulation pipeline I and simulation Pipeline II is located at same vertical plane, and simulation pipeline II and simulation pipeline III are located at same level, and three simulation pipelines are whole In 3% gradient;
The simulated leakage device is to open up leak on simulation duct wall, and proportioning valve and flow are equipped on leak Meter is simulated fixed leakage rate by proportional valve control, is all provided on every simulation pipeline there are two simulated leakage device, along simulation pipe Track media transmission direction is followed successively by the first simulated leakage device, the second simulated leakage device;
The medium conveying apparatus includes simulation fuel gas transmission pipe network, pressure-regulating valve, the system that can be situated between, simulation entrance Valve, simulation pipe outlet valve;Every simulation entrance is equipped with simulation entrance valve, and outlet is equipped with simulation pipe outlet Valve;The system output that can be situated between is connected with the pressure-regulating valve arrival end, and the pressure-regulating valve port of export is fired with simulation Letter shoot web portal is connected, and the system that can be situated between to simulation fuel gas transmission pipe network pumped (conveying) medium and is controlled by pressure-regulating valve Simulate fuel gas transmission pipe network pressure rating;
The sound pressure signal detection device includes pressure gauge, temperature sensor, pressure sensor, differential pressure pickup, sound wave Sensor, Dynamic High-accuracy signal data acquisition card, generic analog signal data collecting card, computer;The every simulation pipe Road is equipped with pressure gauge, temperature sensor, pressure sensing successively in the upstream end of the first simulated leakage device along medium transmission direction Device, differential pressure pickup, sonic sensor are set between two simulated leakage devices there are two sonic sensor, in the second simulation The downstream of leakage device is equipped with sonic sensor, differential pressure pickup, pressure sensor, temperature successively along pipeline medium transmission direction Spend sensor, pressure gauge;The output terminal of the sonic sensor is connected with the input terminal of Dynamic High-accuracy signal data acquisition card, The output terminal of Dynamic High-accuracy signal data acquisition card is connected with computer;The temperature sensor, pressure sensor and pressure difference Sensor output is connected with generic analog signal data collecting card input terminal, the generic analog signal data collecting card output End is connected with computer;Data collecting card can gather sonic sensor, pressure sensor, differential pressure pickup, temperature sensor Signal and transmit a signal to computer and analyzed.
According to the above-mentioned technical solution, the latest theories and grind that the present invention develops with current Detection Technique of Gas Pipeline Study carefully achievement, devising a set of can realize based on the leak judgment method that pressure and sound wave signal interaction identify transports gas pipeline Row parameter acquisition and the simulation experiment platform of leak detection positioning.
Two simulated leakage devices, pipe leakage process point are set on every simulation pipeline of simulation fuel gas transmission pipe network It is not simulated by the combination of proportioning valve and flowmeter, wherein proportioning valve is by controlling aperture simulated leakage size, flowmeter Dosing leak amount.Can be as needed, pass through the simulation entrance valve and simulation pipe outlet being opened and closed on different simulation pipelines Valve, the optional experiment for doing a root long straight pipeline can also do the reality of the pipe network system being made of two pipelines or three pipelines simultaneously It tests.On the one hand the long straight pipeline of different tube diameters and the experimental study of the leakage operating mode of complicated loop network, the opposing party can be simulated Face can simulate the examination of the leakage operating mode of the different brackets leakage rate such as micro hole, small hole leaking by controlling the aperture of proportioning valve Test research.
Sonic sensor, differential pressure pickup, pressure sensor, temperature sensor on every simulation pipeline detect let out respectively The acoustic signals generated, pressure difference signal, pressure signal, temperature signal are leaked, by Dynamic High-accuracy signal data acquisition card and is led to Acoustic signals, pressure difference signal, pressure signal, the temperature signal of every simulation pipeline are gathered with analog signal data capture card.It adopts The acoustic signals that collect, pressure difference signal, pressure signal, temperature signal pass to and Data Analysis Services carried out on computer, calculate Go out pipeline leak position.
Fuel gas pipeline leakage detects the basic principle with positioning:Moment occurs in pipe leakage, generates an acoustic signals, Since leak can cause pressure drop, a pressure signal is formed.There is instantaneous pressure drop in pressure signal, and acoustic signals go out The transient rise of the existing sound intensity, one rise and one drop of two kinds of signals become the notable feature that pipe leakage occurs, can be by being mounted on pipe The signal acquisitions such as the sonic sensor and pressure sensor at road both ends realize the real-time detection of leakage;Holding after leakage occurs Within the continuous time, pressure signal forms cyclic fluctuation, and sound intensity signal is always maintained at very high level, then leakage can be achieved Continuation detects.Simultaneously as the speed that the characteristic signals such as suction wave, sound wave caused by pipe leakage are propagated in different medium Difference can realize that the information between two kinds of signals couples to determine the positioning of leakage according to the time difference of the unlike signal measured.
Preferably, simulate pipeline II and simulate the common port pipeline of the entrance of pipeline III equipped with common port inlet valve, mould The common port pipeline intended pipeline II and simulate the outlet of pipeline III is equipped with common port outlet valve.
It is so more convenient that a simulation pipeline experiment, two simulation pipelines experiments or three moulds are done by valve control choosing Intend pipeline experiment, convenient for experimental implementation.
Preferably, using blind plate sealing, pipe network outlet lower end is additionally provided with blowdown for the simulation fuel gas transmission pipe network outlet Branch, branch road are equipped with blowdown valve, it can be achieved that purging blowdown to pipeline.After experiment, medium in pipeline is from blowdown valve Discharge.
Preferably, the high-end safety vent valve that is equipped with of the simulation fuel gas transmission pipe network is put for pipe network overpressure protection and medium It is empty.
Preferably, it is described simulation pipeline I, simulation pipeline II, simulate pipeline III size be respectively DN50, DN100, DN150。
Preferably, the system that can be situated between includes the air compressor machine, check-valves, the first ball valve, the second ball valve, the vortex street that are sequentially connected Flowmeter, the 3rd ball valve;Drying pipeline is parallel at second ball valve, which includes the 4th ball being sequentially connected Valve, drier, the 5th ball valve.
The system that can so be situated between enters dry compressed air to simulation gas supply pipe Netcom and simulates natural gas, with actual condition It is more nearly.
Beneficial effects of the present invention:
1st, the fuel gas pipeline leakage identified based on pressure and sound wave signal interaction detects positioning experiment platform, passes through two kinds of numbers According to the data of capture card acquisition multiple sensors, by the data of acquisition by inputting Computer signal processing system, in computer It is middle to realize the pipeline leakage testing positioning identified based on pressure wave and sound wave signal interaction, it is combined using software and hardware, Neng Gouyou Effect reduces rate of false alarm and rate of failing to report, improves positioning accuracy.
2nd, at present on the one hand main pipeline leakage testing experimental system is only limitted to detect aperture ratio 10%~20% Above accident release to small slow leakage, can not be implemented to position.On the other hand it is mostly to pass through valve to have experimental system The form of directly perforate carrys out simulated leakage process on door or pipeline.And this experiment porch can be small by the way that leakage rate is controlled to simulate The experimental study of the leakage operating mode of the difference leakage rate such as hole leakage, small hole leaking.
3rd, can be detected in fuel gas pipeline leakage with realizing a variety of experiments leaked under working conditions of simulation in positioning experiment, Including different pipeline flows, different pressure ratings, the pipeline of different tube diameters, different leakage rates etc. to leakage sound pressure signal inspection Survey the influence of effect.
4th, the experimental system both at home and abroad for gas leakage detection is mostly straight pipeline experimental bench simple in structure, such experiment On the one hand pipeline can not simulate complicated conduit running operating mode, on the other hand since data collecting system is incomplete, dash forward to pipeline The measure of leakage situation is given vent to, error is larger.This experiment porch can not only simulate straight pipeline operating condition, but also can simulate multiple Miscellaneous annulus line operating condition.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution of the prior art Embodiment or attached drawing needed to be used in the description of the prior art are briefly described.In all of the figs, similar element Or part is generally identified by similar reference numeral.In attached drawing, each element or part might not be drawn according to actual ratio.
Fig. 1 is structure diagram of the invention in specific embodiment;
Fig. 2 is the structure diagram of system of being situated between in Fig. 1;
Fig. 3 is pipeline leakage detection and location schematic diagram;
In attached drawing:1- can be situated between system;2- pressure-control valves;3- simulates entrance valve;4- flanges;5- pressure gauges;6- temperature Spend sensor;7- pressure sensors;8- differential pressure pickups;9- sonic sensors;10- simulated leakage devices;10a- proportioning valves; 10b- flowmeters;10c- leaks;11- common port inlet valves;12- safety vent valves;13- blowdown valves;14- blind plates;15- is general Data collecting card;16- Dynamic High-accuracy signal data acquisition cards;17- computers;18- air compressor machines;19- shut-off valves;20- first Ball valve;The second ball valves of 21-;22- vortex-shedding meters;The 3rd ball valves of 23-;The 4th ball valves of 24-;The 5th ball valves of 25-;26- driers; 27- simulates pipe outlet valve;28- common port outlet valves;29- transmission pipeline networks.
Specific embodiment
The embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.
In the present embodiment, the orientation or position of the instructions such as term " on " " under " " left side " " right side " " preceding " " rear " " upper end " " lower end " It is based on orientation shown in the drawings or position relationship to put relation, is for only for ease of description rather than instruction or implies meaning Device or element must have specific orientation, with specific azimuth configuration or operation, therefore it is not intended that the present invention's Limitation.
A kind of fuel gas pipeline leakage based on sound pressure signal identification as shown in Figure 1 detects positioning experiment platform, including mould Intend fuel gas transmission pipe network, simulated leakage device, medium conveying apparatus, sound pressure signal detection device.
The simulation fuel gas transmission pipe network 29 is made of the simulation pipeline networking of three different-diameters, simulates pipeline I and mould Intend pipeline II and be located at same vertical plane, simulation pipeline II and simulation pipeline III are located at same level, and three simulation pipelines are whole In 3% gradient, every simulation pipeline can as the case may be lengthened by flange 4.
The simulated leakage device 10 is to open up leak 10c on simulation duct wall, and proportioning valve is equipped on leak 10a and flowmeter 10b simulates fixed leakage rate by proportional valve control, is all provided with that there are two simulated leakages on every simulation pipeline Device is followed successively by the first simulated leakage device, the second simulated leakage device along simulation pipeline medium direction.
The medium conveying apparatus includes simulation fuel gas transmission pipe network 29, pressure-regulating valve 2, the system that can be situated between 1, simulation pipeline Inlet valve 3, simulation pipe outlet valve 27;Every simulation entrance is equipped with simulation entrance valve 3, and outlet is equipped with simulation Pipe outlet valve 27;1 output terminal of system that can be situated between is connected with 2 arrival end of pressure-regulating valve, and the pressure-regulating valve 2 goes out Mouthful end is connected with simulation 29 entrance of fuel gas transmission pipe network, and the system 1 that can be situated between is by pressure-regulating valve 2 to simulating gas supply pipe 29 pumped (conveying) medium of net and the pressure rating for controlling simulation fuel gas transmission pipe network 29.
The sound pressure signal detection device include pressure gauge 5, temperature sensor 6, pressure sensor 7, differential pressure pickup 8, Sonic sensor 9, Dynamic High-accuracy signal data acquisition card 15, generic analog signal data collecting card 16, computer 17;It is described Every simulation pipeline is equipped with pressure gauge 5, temperature sensing successively in the upstream end of the first simulated leakage device along medium transmission direction Device 6, pressure sensor 7, differential pressure pickup 8, sonic sensor 9, set between two simulated leakage devices there are two sound wave pass Sensor 9 is equipped with sonic sensor 9 successively in the downstream of the second simulated leakage device along pipeline medium transmission direction, pressure difference passes Sensor 8, pressure sensor 7, temperature sensor 6, pressure gauge 5;The output terminal of the sonic sensor 9 and Dynamic High-accuracy signal The input terminal of data collecting card 15 is connected, and the output terminal of Dynamic High-accuracy signal data acquisition card is connected with computer 17;It is described Temperature sensor 6, pressure sensor 7 and 8 output terminal of differential pressure pickup and 16 input terminal phase of generic analog signal data collecting card Even, 16 output terminal of generic analog signal data collecting card is connected with computer 17.Two kinds of data collecting cards can gather sound Wave sensor, pressure sensor, differential pressure pickup, temperature sensor signal and transmit a signal to computer 17 and divided Analysis.
Two simulated leakage devices 10, pipe leakage mistake are set on every simulation pipeline of simulation fuel gas transmission pipe network 29 Journey is simulated respectively by the combination of proportioning valve and flowmeter, the aperture of wherein proportioning valve 10a control leaks 10c, flow Count 10b dosing leak amounts.Can be as needed, it is managed by the simulation entrance valve 3 and simulation that are opened and closed on different simulation pipelines Road outlet valve 27, the optional experiment for doing a root long straight pipeline can also do the pipe network system that two pipelines or three pipelines form simultaneously The experiment of system.On the one hand the long straight pipeline of different tube diameters and the experimental study of the leakage operating mode of complicated loop network can be simulated, On the other hand the leakage work of the different brackets leakage rate such as micro hole, small hole leaking can be simulated by controlling the aperture of proportioning valve The experimental study of condition.
Sonic sensor, differential pressure pickup, pressure sensor, temperature sensor on every simulation pipeline detect let out respectively Leak the acoustic signals generated, pressure difference signal, pressure signal, temperature signal.By Dynamic High-accuracy signal data acquisition card and lead to Acoustic signals, pressure difference signal, pressure signal, the temperature signal of every simulation pipeline are gathered with analog signal data capture card.It adopts Acoustic signals, pressure difference signal, pressure signal, the temperature signal collected passes to and Data Analysis Services is carried out on computer, calculates Go out pipeline leak position.
Fuel gas pipeline leakage detects as follows with the basic principle of positioning:Moment occurs in pipe leakage, generates a sound wave Signal since leak can cause pressure drop, forms a pressure signal.There is instantaneous pressure drop in pressure signal, and sound wave There is the transient rise of the sound intensity in signal, and one rise and one drop of two kinds of signals becomes the notable feature that pipe leakage occurs, can pass through peace The real-time detection of leakage is realized mounted in the signal acquisitions such as the sonic sensor of pipe ends and pressure sensor;Occur in leakage Within duration afterwards, pressure signal forms cyclic fluctuation, and sound intensity signal is always maintained at very high level, then can be achieved The continuation detection of leakage.Simultaneously as the characteristic signals such as suction wave, sound wave are propagated in different medium caused by pipe leakage Speed it is different, can realize that the information between two kinds of signals couples to determine leakage according to the time difference of the unlike signal measured Positioning.
Preferably, the common port pipeline for simulating the entrance of pipeline II and simulation pipeline III is equipped with common port inlet valve 11, The common port pipeline simulated pipeline II and simulate the outlet of pipeline III is equipped with common port outlet valve 28.It is so more convenient to pass through Valve controls the pipe network system of the experiment for selecting a simulation pipeline straight pipeline, two simulation pipeline experiments or three simulation pipeline compositions System experiment, convenient for experimental implementation.
Preferably, 29 outlet of simulation fuel gas transmission pipe network is sealed using blind plate 14, and pipe network outlet lower end is additionally provided with Blowdown branch, branch road are equipped with blowdown valve 13, it can be achieved that purging blowdown to pipeline.After experiment, medium in pipeline from Blowdown valve is discharged.
Preferably, the high-end safety vent valve 12 that is equipped with of the simulation fuel gas transmission pipe network 29 is used for pipe network overpressure protection and Jie Matter is vented.
Preferably, it is described simulation pipeline I, simulation pipeline II, simulate pipeline III size be respectively DN50, DN100, DN150。
Preferably, as shown in Fig. 2, the system 1 that can be situated between includes the air compressor machine 18, check-valves 19, the first ball that are sequentially connected Valve 20, the second ball valve 21, vortex-shedding meter 22, the 3rd ball valve 23;Drying pipeline is parallel at second ball valve 21, this is dry Dry pipeline includes the 4th ball valve 24, drier 26, the 5th ball valve 25 that are sequentially connected.The system that can so be situated between to simulation fuel gas transmission Pipe network is passed through dry compressed air simulation natural gas and is more nearly with actual condition.
Experiment porch of the present invention is applicable in pressure≤1.2MPa, when which works, is compressed by air compressor machine 18 Air inputs 26 dry gas of drier, then input simulation fuel gas transmission pipe network 29, and providing experiment for experimental simulation system is situated between Matter by controlling all kinds of control valves on simulation fuel gas transmission pipe network 29 and every simulation pipeline, respectively enters air dielectric The leakage simulation pipeline of different tube diameters.By the way that the proportioning valve 10a on three simulation pipelines is controlled to control the aperture of leak 10b, Simulate the experimental study of the leakage operating modes of different brackets leakage rate such as micro hole, small hole leaking.
Moment occurs in simulation pipe leakage, generates an acoustic signals, since leak can cause pressure drop, is formed One pressure signal.There is instantaneous pressure drop in pressure signal, and the transient rise of the sound intensity occur in acoustic signals, and the one of two kinds of signals Rising a drop becomes the notable feature that pipe leakage occurs, can be by being mounted on the sonic sensor and pressure sensor of pipe ends Signal acquisitions is waited to realize the real-time detection of leakage;Within the duration after leakage occurs, pressure signal forms periodicity Fluctuation, and sound intensity signal is always maintained at very high level, then the continuation detection of leakage can be achieved.Simultaneously as pipe leakage The speed that the characteristic signals such as caused suction wave, sound wave are propagated in different medium is different, can be according to the unlike signal measured Time difference realizes that the information between two kinds of signals couples to determine the positioning of leakage.
Duct length is L (m) between upstream and downstream A, B station as shown in Figure 3;Distance of the leakage point away from upstream A points is x (m);Pipeline The spread speed of suction wave is v (m/s) in transmission medium;The time that upstream and downstream sensor receives suction wave is respectively t1, t2 (s).Then have:
It arranges:The i.e. required orientation distances of X.
Finally it should be noted that:The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations;Although The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that;It still may be used Either which part or all technical characteristic are equal with modifying to the technical solution recorded in previous embodiment It replaces;And these modifications or replacement, the essence of appropriate technical solution is not made to depart from the model of technical solution of the embodiment of the present invention It encloses, should all cover among the claim of the present invention and the scope of specification.

Claims (6)

1. a kind of fuel gas pipeline leakage based on sound pressure signal identification detects positioning experiment platform, it is characterised in that:Including simulation Fuel gas transmission pipe network, simulated leakage device, medium conveying apparatus, sound pressure signal detection device;
The simulation fuel gas transmission pipe network is made of the simulation pipeline networking of three different-diameters, simulation pipeline I and simulation pipeline II is located at same vertical plane, and simulation pipeline II and simulation pipeline III are located at same level, and three pipelines are in integrally 3% slope Degree;
The simulated leakage device is to open up leak on simulation duct wall, and proportioning valve and flowmeter are equipped on leak, Fixed leakage rate is simulated by proportional valve control, is all provided on every simulation pipeline there are two simulated leakage device, along simulation pipeline Medium transmission direction is followed successively by the first simulated leakage device, the second simulated leakage device;
The medium conveying apparatus include simulation fuel gas transmission pipe network, pressure-regulating valve, the system that can be situated between, simulation entrance valve, Simulate pipe outlet valve;Every simulation entrance is equipped with simulation entrance valve, and outlet is equipped with simulation pipe outlet valve; The system output that can be situated between is connected with the pressure-regulating valve arrival end, and the pressure-regulating valve port of export and simulation combustion gas are defeated Pipe network entrance is sent to be connected, the system that can be situated between to simulation fuel gas transmission pipe network pumped (conveying) medium and controls simulation by pressure-regulating valve Fuel gas transmission pipe network pressure rating;
The sound pressure signal detection device includes pressure gauge, temperature sensor, pressure sensor, differential pressure pickup, sound wave sensing Device, Dynamic High-accuracy signal data acquisition card, generic analog signal data collecting card, computer;The every simulation pipeline exists The upstream end of first simulated leakage device is equipped with pressure gauge, temperature sensor, pressure sensor, pressure successively along medium transmission direction Gap sensor, sonic sensor set there are two sonic sensor between two simulated leakage devices, are filled in the second simulated leakage The downstream put is equipped with sonic sensor, differential pressure pickup, pressure sensor, temperature sensing successively along pipeline medium transmission direction Device, pressure gauge;The output terminal of the sonic sensor is connected with the input terminal of Dynamic High-accuracy signal data acquisition card, high-precision The output terminal of dynamic signal data capture card is connected with computer, the temperature sensor, pressure sensor and differential pressure pickup Output terminal is connected with generic analog signal data collecting card input terminal, the generic analog signal data collecting card output terminal and meter Calculation machine is connected;Data collecting card can gather the signal of sonic sensor, pressure sensor, differential pressure pickup, temperature sensor And it transmits a signal to computer and is analyzed.
2. the fuel gas pipeline leakage according to claim 1 based on sound pressure signal identification detects positioning experiment platform, special Sign is:The common port pipeline simulated pipeline II and simulate the entrance of pipeline III is equipped with common port inlet valve, simulates pipeline II Common port outlet valve is equipped with the common port pipeline of the outlet of simulation pipeline III.
3. the fuel gas pipeline leakage according to claim 1 based on sound pressure signal identification detects positioning experiment platform, special Sign is:Using blind plate sealing, pipe network outlet lower end is additionally provided with blowdown branch, branch for the simulation fuel gas transmission pipe network outlet Blowdown valve is equipped with, it can be achieved that purging blowdown to pipeline.
4. the fuel gas pipeline leakage according to claim 1 based on sound pressure signal identification detects positioning experiment platform, special Sign is:The high-end safety vent valve that is equipped with of simulation fuel gas transmission pipe network is vented for pipe network overpressure protection and medium.
5. the fuel gas pipeline leakage according to claim 1 based on sound pressure signal identification detects positioning experiment platform, special Sign is:The simulation pipeline I, simulation pipeline II, the size of simulation pipeline III are respectively DN50, DN100, DN150.
6. the fuel gas pipeline leakage according to claim 1 based on sound pressure signal identification detects positioning experiment platform, special Sign is:It is described can be situated between system include be sequentially connected air compressor machine, check-valves, the first ball valve, the second ball valve, vortex-shedding meter, 3rd ball valve;Drying pipeline is parallel at second ball valve, which includes the 4th ball valve being sequentially connected, drying Device, the 5th ball valve.
CN201711291102.3A 2017-12-08 2017-12-08 Gas pipeline leakage detection positioning experiment platform based on sound pressure signal identification Expired - Fee Related CN108050394B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN111059587A (en) * 2018-10-17 2020-04-24 宁波方太厨具有限公司 Central flue system and sealing state detection method thereof
CN111076096A (en) * 2019-12-31 2020-04-28 北京讯腾智慧科技股份有限公司 Gas pipe network leakage identification method and device
CN112856248A (en) * 2020-12-31 2021-05-28 中国特种设备检测研究院 Underground pressure pipeline leakage detection method, device and system and storage medium

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002243572A (en) * 2001-02-21 2002-08-28 Osaka Gas Co Ltd Method and device for inspecting piping leakage
CN201723984U (en) * 2009-12-10 2011-01-26 张甫仁 Gas leakage positioning experiment device
CN103486443A (en) * 2013-10-15 2014-01-01 东北石油大学 Oil and gas leakage detection simulation test system
US20150068288A1 (en) * 2012-03-30 2015-03-12 Atomic Energy Of Canada Limited Leak location detection system
CN105546360A (en) * 2016-02-04 2016-05-04 江苏省特种设备安全监督检验研究院常州分院 Urban delivery pipeline leakage detection simulation experiment system and method
CN106352246A (en) * 2016-11-09 2017-01-25 南京工业大学 Pipeline leakage detecting and positioning experimental system and detection method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002243572A (en) * 2001-02-21 2002-08-28 Osaka Gas Co Ltd Method and device for inspecting piping leakage
CN201723984U (en) * 2009-12-10 2011-01-26 张甫仁 Gas leakage positioning experiment device
US20150068288A1 (en) * 2012-03-30 2015-03-12 Atomic Energy Of Canada Limited Leak location detection system
CN103486443A (en) * 2013-10-15 2014-01-01 东北石油大学 Oil and gas leakage detection simulation test system
CN105546360A (en) * 2016-02-04 2016-05-04 江苏省特种设备安全监督检验研究院常州分院 Urban delivery pipeline leakage detection simulation experiment system and method
CN106352246A (en) * 2016-11-09 2017-01-25 南京工业大学 Pipeline leakage detecting and positioning experimental system and detection method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN111059587A (en) * 2018-10-17 2020-04-24 宁波方太厨具有限公司 Central flue system and sealing state detection method thereof
CN111076096A (en) * 2019-12-31 2020-04-28 北京讯腾智慧科技股份有限公司 Gas pipe network leakage identification method and device
CN112856248A (en) * 2020-12-31 2021-05-28 中国特种设备检测研究院 Underground pressure pipeline leakage detection method, device and system and storage medium

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