CN103727397A - Sensing device for detecting pipeline leakage signals - Google Patents
Sensing device for detecting pipeline leakage signals Download PDFInfo
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- CN103727397A CN103727397A CN201210408200.1A CN201210408200A CN103727397A CN 103727397 A CN103727397 A CN 103727397A CN 201210408200 A CN201210408200 A CN 201210408200A CN 103727397 A CN103727397 A CN 103727397A
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- supporting base
- sensing device
- pipeline
- piezoelectric ceramic
- isolating plate
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Abstract
The invention relates to a sensing device for detecting pressure fluid pipeline leakage signals. The sensing device comprises a sensor outer barrel, a sealing pressure head, a piezoelectric ceramic piece, a compression spring, a sealing ring, a supporting base, a weak signal amplifier and a segregation board. The lower end of the sensor outer barrel is fixed to the supporting base, the upper end of the sensor outer barrel is mechanically connected with the sealing pressure head, and the lower end face of the supporting base is a circular arc face which is consistent with the outer surface of a pipeline. The sensing device for nondestructively detecting the long-distance pipeline leakage signals can detect the weak leakage signals of the pressure fluid pipeline without destructing the pressure fluid pipeline.
Description
Technical field
The present invention relates to a kind of sensing device detecting for gas pipeline, oil transmission pipeline, water pipe equal pressure fluid line leakage signal.
Technical background
Be embedded in underground gas pipeline, oil transmission pipeline, water pipe equal pressure fluid line because laying work area is wide, after leaking appears in pipeline, its leakage point is not easy to be found in time, thereby causes the loss and waste of resource, and may bring potential safety hazard and to environment.
At present, for the detection of pipeline leakage signal, be mainly to rely on pressure transducer and ultrasonic wave sensor, pressure transducer, using the higher piezoelectric crystal of sensitivity as signal detection component, by the comparison of voltage signal and pressure size, carries out the demarcation of pressure transducer.But pressure transducer is mainly deposited defect both ways: one, pressure transducer is expensive, increased the cost of pipeline leakage testing supervisory system; Two, Sensitivity in Pressure Sensors is high, in actual use, because the normal pressure surge meeting of pipeline inner fluid self brings larger noise to the detection of leakage signal, thereby is unfavorable for detection and the processing of leakage signal, easily causes the erroneous judgement of system.Ultrasonic wave sensor has effect clearly in noise suppression, but ultrasonic wave sensor is received the restriction of signal frequency range, only limit to the input of supersonic range scope, some leakage signal outside supersonic range scope do not had to detection effect, Gu be unfavorable for the detection of leakage signal.
For the existing defect of above-mentioned pipeline leakage signal sensing device, there is at present a kind of pipeline leakage signal sensing device, this sensing device has solved some above-mentioned defects, used with the leakage signal of the effect convection cell of pipeline communication and detected, made pipeline leakage signal not be subject to the interference of other signal; And adopted the parts such as piezoelectric ceramic and Compress Spring, can be for any frequency range, and easy to use.But this kind of sensing device must be offered mounting hole when mounted on fluid line, can cause damage and failure by convection cell pipeline, and this kind of sensing device is comparatively difficult for the detection of the small-signal of small aperture leakage.
Summary of the invention
The object of this invention is to provide a kind of pipeline leakage signal and detect sensing device, faint leakage signal that can detected pressures fluid line, and can damage and failure pressure fluid pipeline.
Pipeline leakage signal of the present invention detects sensing device, comprise sensor urceolus, sealing pressure head, piezoelectric ceramic, Compress Spring and seal ring, also comprise supporting base, small signals amplification device and isolating plate, sensor urceolus lower end is fixed on supporting base, its upper end and sealing pressure head mechanical connection, supporting base lower end surface is the arc surface consistent with pipeline external surface; Seal ring and isolating plate are positioned at port, sensor urceolus upper end, sealing under pressure head effect this port closed, and seal ring is between sensor urceolus upper end end face and isolating plate, piezoelectric ceramic and Compress Spring are positioned at sensor urceolus, and piezoelectric ceramic is supported on supporting base by Compress Spring; Small signals amplification device is fixed on isolating plate, in the cavity between isolating plate and sealing pressure head, and is connected with piezoelectric ceramic by signaling line.
On supporting base, be provided with fixing device for installing, it is comprised of elasticity band and snap close, and elasticity band one end is fixed on supporting base one side, and snap close is fixed on supporting base opposite side, and the elasticity band the other end arranges head hook.
This sensing device is fixed on pressure fluid pipeline by fixing device for installing, makes supporting base lower end surface and the laminating of pressure fluid pipeline external surface, small signals amplification device processes with signal by wire and data trasmission package is connected.
Isolating plate is used for installing signal amplifier, and sealing pressure head is for isolating plate and seal ring being pressed abd fixed on to the end face of sensor urceolus, to seal sensor urceolus and small signals amplification device.The oscillating signal that small signals amplification device can transmit pipeline amplifies, and by noise filtering dislocation.
When tested pipeline occurs to leak, the oscillating signal that pipeline transmits passes to piezoelectric ceramic by supporting base, Compress Spring, and piezoelectric ceramic passes to small signals amplification device by signaling line by oscillating signal again.Sensing device is delivered to front end signal processing circuit by the signal detecting, after processing by signal processing circuit, data are sent to Master Control Center by transmitting set, and Master Control Center, by computing, can carry out the judgement of leakage monitoring and leakage point position in real time to affiliated pipe network.
Pipeline leakage signal of the present invention detects sensing device, because piezoelectric ceramic is supported on the supporting base of fitting with pipeline external surface and is connected with small signals amplification device by signaling line by Compress Spring, therefore the signal that can not only can leak large aperture detects, but also can detect the faint leakage signal of small aperture, improved the sensitivity that sensing device is caught pipeline leakage signal, and be not subject to duct noise, i.e. the interference effect of other signals outside pipeline leakage signal.This sensing device can be arranged on pipeline by the fixing device for installing arranging on supporting base, without carry out the operations such as perforate on pipeline, therefore can not cause damage to pipeline.
Accompanying drawing explanation
Now by reference to the accompanying drawings the present invention is described in further detail:
Fig. 1 is that master of the present invention looks generalized section.
Embodiment
As shown in Figure 1, this pipeline leakage signal detects sensing device and comprises sensor urceolus 9, sealing pressure head 1, piezoelectric ceramic 3, Compress Spring 4, seal ring 10, supporting base 5, small signals amplification device 2 and isolating plate 11, sensor urceolus 9 lower ends are fixed on supporting base 5, its upper end spins by screw thread with sealing pressure head 1, and supporting base 5 lower end surfaces are the arc surface consistent with pipeline external surface.Seal ring 10 and isolating plate 11 are positioned at sensor urceolus 9 ports, upper end, and under the effect of sealing pressure head 1, by this port closed, and seal ring 10 is between sensor urceolus 9 upper end end faces and isolating plate 11.Piezoelectric ceramic 3 and Compress Spring 4 are positioned at sensor urceolus 9, and piezoelectric ceramic 3 is supported on supporting base 5 by Compress Spring 4.Small signals amplification device 2 is fixed on isolating plate 11, in the cavity between isolating plate 11 and sealing pressure head 1, and is connected with piezoelectric ceramic 3 by signaling line.On supporting base 5, be provided with the fixing device for installing being comprised of elasticity band 6 and snap close 8, elasticity band 6 one end are fixed on supporting base 5 one sides, and snap close 8 is fixed on supporting base 5 opposite sides, and elasticity band 6 the other ends arrange head hook 7.
Claims (2)
1. pipeline leakage signal detects sensing device, comprise sensor urceolus (9), sealing pressure head (1), piezoelectric ceramic (3), Compress Spring (4) and seal ring (10), it is characterized in that: also comprise supporting base (5), small signals amplification device (2) and isolating plate (11), sensor urceolus lower end is fixed on supporting base, its upper end and sealing pressure head mechanical connection, supporting base lower end surface is the arc surface consistent with pipeline external surface; Seal ring and isolating plate are positioned at port, sensor urceolus upper end, sealing under pressure head effect this port closed, and seal ring is between sensor urceolus upper end end face and isolating plate, piezoelectric ceramic and Compress Spring are positioned at sensor urceolus, and piezoelectric ceramic is supported on supporting base by Compress Spring; Small signals amplification device is fixed on isolating plate, in the cavity between isolating plate and sealing pressure head, and is connected with piezoelectric ceramic by signaling line.
2. pipeline leakage signal according to claim 1 detects sensing device, it is characterized in that: on supporting base, be provided with fixing device for installing, it is comprised of elasticity band (6) and snap close (8), elasticity band one end is fixed on supporting base one side, snap close is fixed on supporting base opposite side, and the elasticity band the other end arranges head hook (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210408200.1A CN103727397A (en) | 2012-10-13 | 2012-10-13 | Sensing device for detecting pipeline leakage signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210408200.1A CN103727397A (en) | 2012-10-13 | 2012-10-13 | Sensing device for detecting pipeline leakage signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103727397A true CN103727397A (en) | 2014-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201210408200.1A Pending CN103727397A (en) | 2012-10-13 | 2012-10-13 | Sensing device for detecting pipeline leakage signals |
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| CN (1) | CN103727397A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889763A (en) * | 2014-10-10 | 2016-08-24 | 保定市金迪科技开发有限公司 | Detecting device and detecting method for pipeline leakage |
| CN106322125A (en) * | 2016-11-14 | 2017-01-11 | 承德石油高等专科学校 | Urban water delivery pipeline having high leakage monitoring accuracy |
| CN113406204A (en) * | 2021-06-25 | 2021-09-17 | 中国船舶重工集团公司第七一九研究所 | External pipeline damage detection system and detection method thereof |
-
2012
- 2012-10-13 CN CN201210408200.1A patent/CN103727397A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105889763A (en) * | 2014-10-10 | 2016-08-24 | 保定市金迪科技开发有限公司 | Detecting device and detecting method for pipeline leakage |
| CN105889763B (en) * | 2014-10-10 | 2017-12-15 | 保定市金迪科技开发有限公司 | The detection device and its detection method of a kind of pipe leakage |
| CN106322125A (en) * | 2016-11-14 | 2017-01-11 | 承德石油高等专科学校 | Urban water delivery pipeline having high leakage monitoring accuracy |
| CN113406204A (en) * | 2021-06-25 | 2021-09-17 | 中国船舶重工集团公司第七一九研究所 | External pipeline damage detection system and detection method thereof |
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Application publication date: 20140416 |