CN101303268A - Water pipe man-made sound wave leakage checking method - Google Patents
Water pipe man-made sound wave leakage checking method Download PDFInfo
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- CN101303268A CN101303268A CNA2007101822696A CN200710182269A CN101303268A CN 101303268 A CN101303268 A CN 101303268A CN A2007101822696 A CNA2007101822696 A CN A2007101822696A CN 200710182269 A CN200710182269 A CN 200710182269A CN 101303268 A CN101303268 A CN 101303268A
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Abstract
The present invention discloses a method for detecting leakages on water pipes by using artificial sound waves. An air compressor with a low-frequency air pressure generator is provided. A gap degassing switch with a degassing outlet connected with a water-using valve port of a water pipe is provided in a degassing channel of the air compressor. An acoustic vibration receiver which is sensitive to the frequency of the low-frequency air pressure generator and which is characterized in that artificial sound waves easy to penetrate the layer of earth can be generated in a chamber formed by water leakage after that a water-air compound with certain frequency waves is filled into the chamber is provided on the ground of the water pipe to be tested. Therefore, the matter leaked from the ventage is only water before the compressed air is filled into the water pipe, while most of the matter leaked from the ventage is air and the amount of water is reduced after the compressed air is filled into the water pipe, and the compressed air leaked from the ventage forms a large area of impact force on the wall around and generate big airflow impact noise because the compressed air has a light deadweight. Therefore, not only the cost of a leak detecting device can be reduced, but also leaked water having tiny noise can be detected by using the method in the present invention.
Description
Technical field
A kind of method of water pipe leak detection, the method for especially utilizing artificial sound wave that water pipe is hunted leak.
Background technology
Water pipe leak detection mainly be now adopt listen a leakage method, this method be with sound transducer along the ground route of burying pipe underground, pointwise is moved, the sound that leaks of the nature that collects is amplified, pass in people's ear,, determine the place that leaks by listening the leakage people rule of thumb to judge.This leakage measuring instrument by sonic quality differs greatly, and the underground sound that leaks is heard in more of poor quality just being difficult to, and the measured price of matter is just very expensive, generally needs 50,000 to hundreds of thousands, is that general enterprise or tin leakage department are all unaffordable.Because the sound that leaks of nature is very weak, the time of particularly leaking, long slightly back produced bigger hole around leak, no longer the small opening perisporium is produced powerful impulsive force and make to leak, thereby leak and do not send the sound that touches hole wall and just flow into the earth, at this moment the sound that leaks just becomes light especially, especially when not knowing the foggara burial place, adopting general leakage listening device, is to find leak source basically.If can will leak signal artificially strengthen, make it than being easier to penetrate soil layer, so not only can be more or less freely hear leak source, reduce to listen and leak a cost, the investigation underground pipe network is arranged that the position on ground also can have very great help.
Summary of the invention
The objective of the invention is: release a kind of signal that will leak and artificially strengthen, make it enter the water pipe leak hunting method that ground receives body than being easier to penetrate soil layer.
The object of the present invention is achieved like this: it comprises an air compressor that has the low frequency air pressure generator, be provided with the gap air escape cock in the outlet passageway of air compressor, the gas outlet and the running water pipe water valve port of gap air escape cock are joined, on the ground of need water gage glass, there is the acoustic vibration of pair frequency sensitive of low frequency air pressure generator to receive body, it is characterized in that: the gas-vapor mix body of certain frequency ripple is filled in the chamber, cave that forms that leaks, make the artificial sound wave that produces easy earth penetrating in the chamber, cave.
Like this, before in water pipe, not charging into pressurized air, from leak, spill whole be water, after charging into compressed gas, the water volume of overflowing from leak then tails off relatively, and major part is a gas, and pressure gas is from heavy and light, after overflowing from leak, form to around hole wall larger area impulsive force, send bigger gas shock sound.For the thin foggara of surperficial soil layer, at this moment can produce the gas shock sound that people's ear can be heard on ground.Because this air-flow comes from the low frequency air pressure generator, therefore it also will produce low-frequency sound wave with the air pressure frequency, and the earth is poor to the receptivity of low-frequency sound wave, is transferred on the ground so low-frequency sound wave just will pass the signal that the stratum leaks sign, is received by ground staff or instrument; When adopting instrument, the receive frequency of instrument can be adjusted to closely with low frequency air pressure generator frequency, can reduce other undesired signal like this.Low-frequency sound wave also can adopt infrasonic wave or approaching infrasonic frequency range, because it is to the penetration capacity extra-heavy on ground, therefore the whole piece pipeline also will become low-frequency sound source, at this time the receiver that can receive this kind sound wave is set, also can differentiates the home position of underground pipeline according to the power of sound signal as ground.The gap air escape cock mainly is to make compressor accumulation air pressure, reduces the use power of compressor.
Description of drawings
Fig. 1 is concrete enforcement figure of the present invention.
Fig. 2 is the low-frequency sound wave synoptic diagram.
Specific implementation method
Among Fig. 11 is the earth, the 2nd, leak, the 3rd, acoustic vibration receives the instrument of body, and it is responsive especially to the low frequency that gas switch produces, the 4th, acoustic vibration receives the collection acoustic shell of body, the 5th, the hole that leaks and form, the 6th, water pipe, the 7th, water swivel, the 8th, the connecting pipe of compressor and water swivel, the 9th, compressor, the 10th, (the gap air escape cock can adopt regularly or the remote control form gap air escape cock, and transmitter is grasped in the leakage detection personnel hand during remote control.) the 11st, the low frequency air pressure generator on the compressor.The time turn off nearby other earlier in leak detection and use penstock, utilize the pressure regulator on the compressor, the compressor maximum pressure is fixed on position greater than water pipe hydraulic pressure, start compressor 9 then, make compressor store positioning pressure into, when starting compressor, start the low frequency air pressure generator work on the compressor, the tap 7 of then fetching boiling water.The leakage detection personnel are put into the collection acoustic shell of acoustic vibration reception body on the ground of pipeline to be checked, intermittently press the remote control transmitter push button then, and air escape cock 10 is exitted to water pipe 6 internal clearances.At this moment in scupper 2, eject a water flow according to the eruption of low frequency gas generator frequency, this water flow impacts in the hole 5 that forms in the back that leaks, in the hole, send audio frequency similar and harmonic wave audio frequency with said frequencies, because these audio frequencies are all lower, it has penetrability preferably to the earth, therefore this powerful low audio frequency that causes after impacting is delivered to ground easily, people's ear can be heard this sound when the stratum is thin, and when the stratum is thicker, can use high-sensitive sound wave leakage measuring instrument by sonic, can establish a harmonic oscillator in this leakage measuring instrument by sonic, after above-mentioned switching frequency ripple entered instrument, harmonic oscillator promptly produced vibration, thereby this instrument is only to above-mentioned low-frequency sound wave sensitivity, then insensitive for other frequency, so it has very strong anti-interference.Above-mentioned low frequency air pressure generator is generally taked the motor machine rotary disk shutter, by the eyelet on the rotating disk compressed gas is fed water pipe, its low frequency is generally per second hundreds of times, also can utilize the inflation frequency in the compressor piston rotation to make low frequency, at this moment can not establish special low frequency air pressure generator.If then connect special-purpose infrasonic wave generating means in the compressor back with the infrasonic wave frequency, infrasonic power can not be too big, and the present invention no longer describes in detail for these prior aries.
Fig. 2 is the low-frequency sound wave synoptic diagram that occurs under the low frequency on-off action.Y axle among the figure is represented intensity of acoustic wave, the x axle is represented the time, the sound wave of the upper frequency that little ripple of time cycle produces when being the air-flow diffusion, represent with 12 among the figure, an envelope 13 is arranged in the outside of upper frequency, it is a low-frequency sound wave, and this low frequency waveform is that the frequency by the low frequency air pressure generator decides.This low-frequency sound wave also can produce harmonic wave in the hole, represent this harmonic wave with 14 among the figure, and low frequency wave and low-frequency harmonics will be easier to pass the stratum, caught by ground people or instrument, and the just not too easy penetrated surface of the sound wave of upper frequency.And originally " neighed! Neigh! " singing of the stream be a kind of sound of upper frequency; poor to the stratum penetrability; and very approaching peripheral nature audio frequency; so interference is big; that and artificial frequency not only utilizes the hole to increase intensity of acoustic wave, and its frequency range can freely be provided with, as can from time shaft the peak separation being elongated; occurring in nature just unlikely has identical frequency arrival reception instrument like this, so the accuracy of hunting leak improves greatly.
Utilize the said equipment to do basic locking to the zone of leaking hunting.Can begin to take turns in regular turn to open from dried up leading 7 the most nearby taps as operating personnel, whenever open a tap, just press the telepilot in the hand, at this moment can just can roughly determine the pipeline section that leaks by observing the aqueous vapor output of tap to the distant place tap.In addition, acoustic vibration receives body can be had a plurality of, many acoustic vibrations are received body, being spaced from each other certain distance along leak detection water pipe road surface places, and on each acoustic vibration reception body, be provided with a water leakage alarm remote transmitter, and when receiving body, some acoustic vibrations receive the signal that leaks, and the transmitter of this reception body will send the water leakage alarm signal to the receiver that operating personnel carry, receive the body orientation according to the acoustic vibration of sending signal, just can find leakage point.
Claims (3)
1. water pipe man-made sound wave leakage checking method, it comprises an air compressor that has the low frequency air pressure generator, be provided with the gap air escape cock in the outlet passageway of air compressor, the gas outlet and the running water pipe water valve port of gap air escape cock are joined, on the ground of need water gage glass, there is the acoustic vibration of pair frequency sensitive of low frequency air pressure generator to receive body, it is characterized in that: the gas-vapor mix body of certain frequency ripple is filled in the chamber, cave that forms that leaks, make the artificial sound wave that produces easy earth penetrating in the chamber, cave.
2. a kind of water pipe man-made sound wave leakage checking method as claimed in claim 1 is characterized in that: described low frequency air pressure generator is to take the motor machine rotary disk shutter, by the eyelet on the rotating disk compressed gas is fed water pipe.
3. a kind of water pipe man-made sound wave leakage checking method as claimed in claim 1 is characterized in that: described low frequency air pressure generator is to utilize the inflation frequency in the compressor piston rotation to make low frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101822696A CN101303268A (en) | 2007-10-10 | 2007-10-10 | Water pipe man-made sound wave leakage checking method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101822696A CN101303268A (en) | 2007-10-10 | 2007-10-10 | Water pipe man-made sound wave leakage checking method |
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| CN101303268A true CN101303268A (en) | 2008-11-12 |
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| CNA2007101822696A Pending CN101303268A (en) | 2007-10-10 | 2007-10-10 | Water pipe man-made sound wave leakage checking method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103047542A (en) * | 2013-01-12 | 2013-04-17 | 苏州市伦琴工业设计有限公司 | Three-point type underground pipeline leakage detecting method |
| CN104930354A (en) * | 2015-05-17 | 2015-09-23 | 沈阳建筑大学 | Three-point underground pipe leakage detecting method |
| CN111780932A (en) * | 2020-07-14 | 2020-10-16 | 王伟权 | Be used for underground water pipe leak source detection device |
| US11525811B2 (en) | 2018-12-28 | 2022-12-13 | Industrial Technology Research Institute | Detection system and detection method |
-
2007
- 2007-10-10 CN CNA2007101822696A patent/CN101303268A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103047542A (en) * | 2013-01-12 | 2013-04-17 | 苏州市伦琴工业设计有限公司 | Three-point type underground pipeline leakage detecting method |
| CN103047542B (en) * | 2013-01-12 | 2014-07-02 | 宁海县雁苍山电力设备厂 | Three-point type underground pipeline leakage detecting method |
| CN104930354A (en) * | 2015-05-17 | 2015-09-23 | 沈阳建筑大学 | Three-point underground pipe leakage detecting method |
| US11525811B2 (en) | 2018-12-28 | 2022-12-13 | Industrial Technology Research Institute | Detection system and detection method |
| CN111780932A (en) * | 2020-07-14 | 2020-10-16 | 王伟权 | Be used for underground water pipe leak source detection device |
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Open date: 20081112 |