CN2793713Y - Kinetic waveguiding pipeline monitoring sensor - Google Patents
Kinetic waveguiding pipeline monitoring sensor Download PDFInfo
- Publication number
- CN2793713Y CN2793713Y CN 200520025297 CN200520025297U CN2793713Y CN 2793713 Y CN2793713 Y CN 2793713Y CN 200520025297 CN200520025297 CN 200520025297 CN 200520025297 U CN200520025297 U CN 200520025297U CN 2793713 Y CN2793713 Y CN 2793713Y
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- cavity
- cap
- pick
- capacitive transducer
- pressure
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Abstract
The utility model discloses a kinetic wave-guiding pipeline monitoring sensor belonging to the sound wave detection sensor technology. The utility model is characterized in that the sensor comprises a T-shaped head and a pick-up cap matched with the T-shaped head, wherein the pick-up cap is short cavity type cylinder of which the lower end is provided with an opening and presents an e index curve-type sound reinforcement cavity and the upper end is provided with a screw connecting cavity. On the end surface on the lower end of the T-shaped head, a sound transmission diaphragm is pressed by the pick-up cap; a conducting cavity of the T-shaped head is provided with a capacitive transducer; sound transmission media are filled between the sound transmission diaphragm and the capacitive transducer; the inner column wall of the conducting cavity is provided with a pressure relief slot which causes the conducting cavity to be communicated with a pressure-stabilizing cavity; an electrode lead of the capacitive transducer is led out of the pressure-stabilizing cavity by a protective sleeve. The utility model has the advantages that the kinetic wave-guiding pipeline monitoring sensor is suitable for monitoring liquid-gas medium pipelines with different pressures and temperatures and monitors the leakage induced by natural cause and that the pipeline is damaged by people; the monitoring sensitivity is high and the electric safety is high. The utility model has the water-resistant performance, the oil-proof performance, the anticorrosion performance, etc.
Description
Technical field
The utility model relates to a kind of dynamic pressure type waveguide type pipeline monitoring sensor, belongs to pipeline monitoring sensor technology.
Background technology
Pipeline transportation is widely used in oil, chemical industry, gas, water supply and the heating industry.With the crude oil pipeline is example, because the pipeline leakage that natural causes such as burn into weld defect, accidental injury cause happens occasionally; More because the case of artificial boring, the pilferage oil gas of punchinging frequently takes place, annual country and the enterprise of giving causes enormous economic loss.For the pipeline leakage that the supervision natural cause causes, existing both at home and abroad comparatively ripe method, wherein typical with the method for static pressure transducer detection suction wave.How pipeline is realized initiatively preventing the monitoring of artificial destruction, this patent has proposed a kind of dynamic pressure type waveguide type pipeline monitoring sensor, be used for being installed on the pipeline, the feature sound wave that detection is propagated by pipeline internal medium, as the feature sound wave of holing, punchinging and sending, the feature sound wave that the burst leakage causes etc.
Summary of the invention
The utility model purpose is to provide a kind of dynamic pressure type waveguide type pipeline monitoring sensor, this sensor has the dynamic pressure test function, can work in have 2MPa pressure, among the gas-liquid medium and thick substances of 70 ℃ of higher temperatures, highly sensitive, operating voltage is low, has performances such as waterproof, grease proofing, anticorrosion.
The utility model is realized by following proposal; a kind of dynamic pressure type waveguide type pipeline monitoring sensor; it is characterized in that; this sensor comprises that an inside offers the T shape 1 and of stepped inner chamber and constitute with the pick up cap 2 of this T shape lower end with threads engaged; described pick up cap is the short cylinder of a cavity type; its lower ending opening is for being e exponential curve type public address chamber; the upper end is for having the connection chamber of internal thread; on a T shape lower end surface, compress a circular soniferous membrane 3 by the pick up cap; a capacitive transducer 5 is set in the conduction chamber of T shape head; be full of sound bearing medium 4 between circular soniferous membrane 3 and the capacitive transducer 5; on the inner cylindrical wall in conduction chamber, have 1-2 bar pressure relief groove 6; this pressure relief groove makes the conduction chamber communicate with pressure stabilizing cavity 7, and the contact conductor of capacitive transducer is drawn by protective casing 8 shieldings and by the pressure stabilizing cavity of T shape head.
Advantage of the present utility model is that this sensor is applicable to the monitoring of carrying liquid medium or gas medium pipeline, both can monitor the sound wave that the artificial destruction pipeline is produced, also can monitor the leakage that causes because of natural cause, can work among the gas-liquid medium and thick substances with different pressures and temperature, highly sensitive, electrical security is strong, has performances such as waterproof, grease proofing, anticorrosion.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
1 is T shape head among the figure, and 2 is the pick up cap, and 3 is soniferous membrane, and 4 is sound bearing medium, and 5 is capacitive transducer, and 6 is pressure relief groove, and 7 is pressure stabilizing cavity, and 8 is the pilot protection sleeve pipe.
Embodiment
Detection principle of the present utility model is based on the guided wave principle of pipeline, and the sound wave teletransmission that is produced when utilizing ducted gas, liquid medium with the artificial destruction pipeline is to this monitoring sensor that is installed on the pipeline.Therefore this sensor must place among the gas, liquid medium of high-voltage transmission, have performances such as waterproof, grease proofing, anticorrosion, T shape head, pick up cap and circular soniferous membrane 3 are all selected the high-quality stainless steel material for use for this reason, and wherein the thickness of soniferous membrane is 0.1-0.3mm according to its thickness of pressure of pipe interior.The effect in e index public address chamber is to improve the predetermined audio frequency signal to noise ratio (S/N ratio) that will receive, and its index shape profile is by the spark erosion moulding.The principle of capacitive transducer is that acoustic signals is converted to capacitance signal, be converted to voltage signal again through the subsequent conditioning circuit processing, capacitive transducer is that the plate electrode by two mutually insulateds constitutes, one of them electrode is the thick metallic films of about 10 μ m, and another electrode is the thick circular metal plate of 1-2mm.Have 1-2 bar pressure relief groove on the inner cylindrical wall in conduction chamber, the sectional area of pressure relief groove is 1 * 1mm
2, can adopt the method processing of spark erosion, this pressure relief groove makes the conduction chamber communicate with pressure stabilizing cavity, therefore, when receiving dynamic sound wave, can modulate the pressure of sound bearing medium, offsets much larger than the influence of the static pressure of sound wave variation.Sound bearing medium can be selected No.200-No.500 silicone oil for use.During installation, the axis of sensor can also can be parallel to the fluid transmission direction perpendicular to the fluid transmission direction.
This sensor for artificial on tube wall boring, saw kerf, punching, bounce, to weld the waveform that is produced very responsive.The tube wall of experiencing that also can be responsive is revealed the negative pressure sound wave that is produced simultaneously, has the double-deck function of prevention artificial destruction and natural leak.
Claims (1)
1. dynamic pressure type waveguide type pipeline monitoring sensor; it is characterized in that; this sensor comprises that an inside offers the T shape head (1) of stepped inner chamber and one and constitute with the pick up cap (2) of this T shape lower end with threads engaged; described pick up cap is the short cylinder of a cavity type; its lower ending opening is for being e exponential curve type public address chamber; the upper end is for having the connection chamber of internal thread; on a T shape lower end surface, compress a circular soniferous membrane (3) by the pick up cap; a capacitive transducer (5) is set in the conduction chamber of T shape head; be full of sound bearing medium (4) between circular soniferous membrane (3) and the capacitive transducer (5); on the inner cylindrical wall in conduction chamber, have 1-2 bar pressure relief groove (6); this pressure relief groove makes the conduction chamber communicate with pressure stabilizing cavity (7), and the contact conductor of capacitive transducer is drawn by protective casing (8) shielding and by the pressure stabilizing cavity of T shape head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520025297 CN2793713Y (en) | 2005-02-21 | 2005-02-21 | Kinetic waveguiding pipeline monitoring sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520025297 CN2793713Y (en) | 2005-02-21 | 2005-02-21 | Kinetic waveguiding pipeline monitoring sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2793713Y true CN2793713Y (en) | 2006-07-05 |
Family
ID=36820856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520025297 Expired - Fee Related CN2793713Y (en) | 2005-02-21 | 2005-02-21 | Kinetic waveguiding pipeline monitoring sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2793713Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936455A (en) * | 2010-07-20 | 2011-01-05 | 中国科学院声学研究所 | Infrasound and low-frequency sound sensor for monitoring fluid leakage in high-pressure pipeline |
| CN108871698A (en) * | 2018-08-17 | 2018-11-23 | 爱德森（厦门）电子有限公司 | A method of improving ping detecting distance ability |
| CN111947849A (en) * | 2020-09-02 | 2020-11-17 | 中国科学院合肥物质科学研究院 | Pipeline detection system based on guided wave detection |
-
2005
- 2005-02-21 CN CN 200520025297 patent/CN2793713Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936455A (en) * | 2010-07-20 | 2011-01-05 | 中国科学院声学研究所 | Infrasound and low-frequency sound sensor for monitoring fluid leakage in high-pressure pipeline |
| CN101936455B (en) * | 2010-07-20 | 2013-02-13 | 中国科学院声学研究所 | Infrasound and low-frequency sound sensor for monitoring fluid leakage in high-pressure pipeline |
| CN108871698A (en) * | 2018-08-17 | 2018-11-23 | 爱德森（厦门）电子有限公司 | A method of improving ping detecting distance ability |
| CN111947849A (en) * | 2020-09-02 | 2020-11-17 | 中国科学院合肥物质科学研究院 | Pipeline detection system based on guided wave detection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |