CN101587098B - Steel tube ultrasonic inspection method capable of simultaneously realizing three functions in one channel - Google Patents
Steel tube ultrasonic inspection method capable of simultaneously realizing three functions in one channel Download PDFInfo
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- CN101587098B CN101587098B CN200810011490XA CN200810011490A CN101587098B CN 101587098 B CN101587098 B CN 101587098B CN 200810011490X A CN200810011490X A CN 200810011490XA CN 200810011490 A CN200810011490 A CN 200810011490A CN 101587098 B CN101587098 B CN 101587098B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 34
- 239000010959 steel Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000007689 inspection Methods 0.000 title claims abstract description 14
- 239000000919 ceramic Substances 0.000 claims abstract description 48
- 239000000523 sample Substances 0.000 claims abstract description 27
- 230000008878 coupling Effects 0.000 claims abstract description 16
- 238000010168 coupling process Methods 0.000 claims abstract description 16
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- 239000000203 mixture Substances 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 7
- 230000007547 defect Effects 0.000 claims description 3
- 230000008034 disappearance Effects 0.000 claims description 3
- 230000001902 propagating effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 238000012544 monitoring process Methods 0.000 abstract description 6
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Abstract
The invention relates to a steel tube ultrasonic inspection method capable of simultaneously realizing three functions in one channel, adopting a three-functional probe consisting of a wedge, a piezo ceramic sheet 1, a piezo ceramic sheet 2 and an adjustable resistance; the piezo ceramic sheet 2 is added on the basis of the common angle probe, the function of the piezo ceramic sheet 1 is the same with the piezo ceramic sheet in the common probe; the piezo ceramic sheet 2 and the wedge form a direct probe with a delaying lump, the piezo ceramic sheet 2 transmits longitudinal waves to steel tubewalls and receives reversed echoes from the inner wall and the outer wall of a steel tube; when the coupling is poor, the reversed echoes Bi of the inner wall of the steel tube is lost or greatly red uced to be lower than the height of a gate, and a monitoring gate W1 sounds an alarm signal; if the wall thickness exceeds the limit, the Bi is moved outside the gate, the W1 also sounds an alarm signal. The invention can automatically monitor the water coupling condition without increasing channels, simultaneously realize the function of monitoring the wall thickness of the steel tube and achievethe purpose that three functions of inspection, coupling monitoring and wall thickness monitoring can be realized by using one channel only.
Description
Technical field
The present invention relates to the steel tube ultrasonic inspection field, provide a passage to realize the steel tube ultrasonic inspection method of three kinds of functions simultaneously especially.
Background technology
Steel pipe is a kind of important structured material, is mainly used in the conveying of liquid material, the HTHP water pipe in the generating field for example, the various process pipeline that chemical industry and petrochemical plant are interior, boiler tube and heat exchanger tube, the oil well pipe that petroleum industry is used and sleeve pipe or the like.In the steel pipe's production process because various contingency are inevitable, so have defective on the steel pipe walls, for example: longitudinal crack, transversal crack, folding, layering or the like defective.In the steel pipe use generally speaking condition all compare harshly, for example the HTHP water pipe used of generating plant except receiving very big interior pressure effect, also receives the corrosive attack of water, oil well casing receives the pressure of soil and the double action of corrosion, or the like.If will breaking, the steel pipe defectiveness causes accident in the middle of using; Even cause serious consequence, for example HTHP water pipe blast, the pipe leakage of the poisonous industrial chemicals of conveying in the chemical plant; The pressure piping blast of transport gas, these all possibly cause heavy economic losses even casualties.All produce the producer of steel pipe in the world for this reason, and for example gloomy Tissen of the base of a fruit of NKK of NKK factory and Germany or the like has perfect non-destructive detecting device, and steel pipe is carried out line flaw detection.In bigbore steel pipe (more than the Φ 70mm), generally adopt the method for common angle probe moisture film coupling to carry out line flaw detection.Under the good situation of coupling, as long as defectiveness just has signal output.In case water system breaks down; Even there has been defective also not have signal output; Certainly also might be owing to steel tube surface out-of-flatness or unholiness cause coupling bad, these will monitor obviously not as monitor automatically by the people, and the difficult discovery of the bad human eye of of short duration coupling.This way was arranged in the past, promptly on each probe, put a piezoelectric patches more, each is popped one's head in two passages, and one is used for flaw detection, and one is used to monitor coupling state.This way is no problem certainly, but the port number of instrument will double, and not only equipment volume increases, and cost also will increase a lot.
Summary of the invention
The objective of the invention is in order to reduce equipment volume, to reduce equipment cost, the spy provides a passage to realize the steel tube ultrasonic inspection method of three kinds of functions simultaneously
The invention provides a passage and realize the steel tube ultrasonic inspection method of three kinds of functions simultaneously; It is characterized in that: a described passage is realized the steel tube ultrasonic inspection method of three kinds of functions simultaneously; Adopt three functions probe, comprise voussoir 1, piezoelectric ceramic piece 1; Piezoelectric ceramic piece 23, variable resistor 4;
Basic structure is on general angle probe basis, has added a piezoelectric ceramic piece 23, and the effect of the piezoelectric ceramic piece in the effect of piezoelectric ceramic piece 1 and the common angle probe is identical; It is to voussoir 1 emission compressional wave; Get into tube wall through superrefraction, converted shear wave this moment to, if shear wave has run into defective when propagating forward; Returned by former road after the defect reflection and to get back to piezoelectric ceramic piece 1, form and hinder echo; Piezoelectric ceramic piece 23 has constituted a normal probe that delay block is arranged with voussoir 1, and piezoelectric ceramic piece 23 is to steel pipe walls emission compressional wave, and reception is from the reflection echo of steel pipe inner and outer wall;
Piezoelectric ceramic piece 23 is received the repeatedly reflection wave from inside pipe wall, then ripple B1 at the bottom of having occurred 1 time on the video screen, ripple B2 at the bottom of 2 times; Until n end ripple Bn; Select one of them to be used to monitor coupling state and whether wall thickness transfinites, for example select B2, hinder the gain that mixes up this passage with labor standard earlier before the flaw detection; Mix up height, width and the position of wounding signal warning gate W2 and W3, make that warning gate W2 and W3 send alerting signal when the inside and outside wall defective; Regulate the variable resistor 4 on the probe then, make ripple at the bottom of each time after the B2 not influence the warning of flaw echo;
Mix up this passage the 1st gate W1 height and be set to lose ripple and report to the police, mix up gate width and position by the wall thickness range that allows.
When not having couplant between defective coupling or detecting head surface and the surface of the work, the B2 disappearance perhaps drops significantly and is lower than the gate height, so W1 sends alerting signal at all; If wall thickness transfinites, B2 moves to outside the gate, and W1 also will send alerting signal.
The mode of connection of described piezoelectric ceramic piece 1 and piezoelectric ceramic piece 23 and reflectoscope does; Parallelly connected with piezoelectric ceramic piece 1 again after variable resistor of piezoelectric ceramic piece 23 series connection, whole probe connects with defectoscope by the mode of connection of single probe pulse echo method.
Come the width and the position of regulating gate with the wall thickness step bar.
The present invention is suitable for the middle heavy caliber pipe that wall thickness 4mm is above, external diameter Φ 70mm is above.
Advantage of the present invention:
Can monitor the water coupling state automatically, do not increase passage again, so the increase of cost be very little, can ignore.In addition, can also realize monitoring the function of thickness of steel pipe simultaneously, thickness of steel pipe is excessive or too small, and instrument can send alerting signal; So just accomplished that flaw detection, coupling are monitored, three functions of wall thickness monitoring are only used a passage.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation:
Fig. 1 is three function sonde configuration synoptic diagram;
Fig. 2 is the piezoelectric ceramic piece one and the mode of connection of piezoelectric ceramic piece two with reflectoscope;
Fig. 3 is the step bar structural drawing;
Fig. 4 is provided with synoptic diagram for echo series with gate.
Embodiment
Present embodiment provides a passage to realize the steel tube ultrasonic inspection method of three kinds of functions simultaneously; It is characterized in that: a described passage is realized the steel tube ultrasonic inspection method of three kinds of functions simultaneously; Adopt three functions probe, comprise voussoir 1, piezoelectric ceramic piece 1; Piezoelectric ceramic piece 23, variable resistor 4;
Basic structure is on general angle probe basis, has added a piezoelectric ceramic piece 23, and the effect of the piezoelectric ceramic piece in the effect of piezoelectric ceramic piece 1 and the common angle probe is identical; It is to voussoir 1 emission compressional wave; Get into tube wall through superrefraction, converted shear wave this moment to, if shear wave has run into defective when propagating forward; Returned by former road after the defect reflection and to get back to piezoelectric ceramic piece 1, form and hinder echo; Piezoelectric ceramic piece 23 has constituted a normal probe that delay block is arranged with voussoir, and piezoelectric ceramic piece 23 is to steel pipe walls emission compressional wave, and reception is from the reflection echo of steel pipe inner and outer wall;
Piezoelectric ceramic piece 23 is received the repeatedly reflection wave from inside pipe wall, then ripple B1 at the bottom of having occurred 1 time on the video screen, ripple B2 at the bottom of 2 times; Until n end ripple Bn; Select one of them to be used to monitor coupling state and whether wall thickness transfinites, for example select B2, hinder the gain that mixes up this passage with labor standard earlier before the flaw detection; Mix up height, width and the position of wounding signal warning gate W2 and W3, make when inwall or outer wall defective warning gate W2 or W3 send alerting signal; Regulate the variable resistor 4 on the probe then, make ripple at the bottom of each time after the B2 not influence the warning of flaw echo;
Mix up this passage the 1st gate W1 height and be set to lose ripple and report to the police, mix up gate width and position by the wall thickness range that allows.
When not having couplant between defective coupling or detecting head surface and the surface of the work, the B2 disappearance perhaps drops significantly and is lower than the gate height, so W1 sends alerting signal at all; If wall thickness transfinites, B2 moves to outside the gate, and W1 also will send alerting signal.
The mode of connection of described piezoelectric ceramic piece 1 and piezoelectric ceramic piece 23 and reflectoscope does; Parallelly connected with piezoelectric ceramic piece 1 again after variable resistor of piezoelectric ceramic piece 23 series connection, whole probe connects with defectoscope by the mode of connection of single probe pulse echo method.
Come the width and the position of regulating gate with the wall thickness step bar.
Present embodiment is suitable for the middle heavy caliber pipe that wall thickness 4mm is above, external diameter Φ 70mm is above.
Claims (2)
1. passage is realized the steel tube ultrasonic inspection method of three kinds of functions simultaneously, and it is characterized in that: a described passage is realized the steel tube ultrasonic inspection method of three kinds of functions simultaneously, adopts three functions probe; Comprise voussoir (1); Piezoelectric ceramic piece one (2), piezoelectric ceramic piece two (3), variable resistor (4);
Basic structure is: on general angle probe basis, added a piezoelectric ceramic piece two (3), the effect of the piezoelectric ceramic piece in the effect of piezoelectric ceramic piece one (2) and the common angle probe is identical; It launches compressional wave to voussoir; Get into tube wall through superrefraction, converted shear wave this moment to, if shear wave has run into defective when propagating forward; Returned by former road after the defect reflection and to get back to piezoelectric ceramic piece one (2), form and hinder echo; Piezoelectric ceramic piece two (3) has constituted a normal probe that delay block is arranged with voussoir (1), and piezoelectric ceramic piece two (3) is to steel pipe walls emission compressional wave, and reception is from the reflection echo of steel pipe inner and outer wall;
Piezoelectric ceramic piece two (3) is received the repeatedly reflection wave from inside pipe wall, then ripple B1 at the bottom of having occurred 1 time on the video screen, ripple B2 at the bottom of 2 times; Until n end ripple Bn; Select one of them to be used to monitor coupling state and whether wall thickness transfinites, when selecting Bi, hinder the gain that mixes up this passage with labor standard earlier before the flaw detection; Mix up height, width and the position of wounding signal warning gate W2 and W3, make when inwall or outer wall defective warning gate W2 or W3 send alerting signal; Regulate the variable resistor (4) on the probe then, make ripple at the bottom of each time after the Bi not influence the warning of flaw echo;
Mix up this passage the 1st gate W1 height and be set to lose ripple and report to the police, mix up gate W1 width and position by the wall thickness range that allows;
When not having couplant between defective coupling or detecting head surface and the surface of the work, the Bi disappearance perhaps drops significantly and is lower than the gate height, so W1 sends alerting signal at all; If wall thickness transfinites, Bi moves to outside the gate, and W1 also will send alerting signal.
2. realize the steel tube ultrasonic inspection method of three kinds of functions simultaneously according to the described passage of claim 1; It is characterized in that: described piezoelectric ceramic piece one (2) and piezoelectric ceramic piece two (3) with the mode of connection of reflectoscope do; Parallelly connected with piezoelectric ceramic piece one (2) again after variable resistor of piezoelectric ceramic piece two (3) series connection, whole probe connects with defectoscope by the mode of connection of single probe pulse echo method.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810011490XA CN101587098B (en) | 2008-05-21 | 2008-05-21 | Steel tube ultrasonic inspection method capable of simultaneously realizing three functions in one channel |
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| CN200810011490XA CN101587098B (en) | 2008-05-21 | 2008-05-21 | Steel tube ultrasonic inspection method capable of simultaneously realizing three functions in one channel |
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| CN101587098B true CN101587098B (en) | 2012-05-16 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US8978476B2 (en) * | 2012-11-05 | 2015-03-17 | General Electric Company | Ultrasonic signal coupler |
| CN104535657B (en) * | 2015-01-13 | 2017-09-15 | 广东汕头超声电子股份有限公司 | A kind of sheet workpiece phased array supersonic guided wave image-forming detecting system and its detection method |
| CN108254444B (en) * | 2017-12-28 | 2020-09-25 | 南京钢铁股份有限公司 | Probe moving speed detection alarm method of portable flaw detector |
| CN110500974B (en) * | 2019-08-06 | 2021-01-05 | 天津大学 | Workpiece thickness detection method based on improved peak recognition |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5280728A (en) * | 1990-11-05 | 1994-01-25 | Tokimec Inc. | Ultrasonic flow velocity measurement method and apparatus thereof |
| EP0965839A1 (en) * | 1997-10-31 | 1999-12-22 | Kawasaki Steel Corporation | Method and apparatus for ultrasonically detecting flaw on surface of circular cylinder, and method of grinding roll utilizing the same |
| CN2497312Y (en) * | 2001-09-24 | 2002-06-26 | 宝山钢铁股份有限公司 | Two-way angle probe of supersonic flaw-detection for steel pipe |
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- 2008-05-21 CN CN200810011490XA patent/CN101587098B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5280728A (en) * | 1990-11-05 | 1994-01-25 | Tokimec Inc. | Ultrasonic flow velocity measurement method and apparatus thereof |
| EP0965839A1 (en) * | 1997-10-31 | 1999-12-22 | Kawasaki Steel Corporation | Method and apparatus for ultrasonically detecting flaw on surface of circular cylinder, and method of grinding roll utilizing the same |
| CN2497312Y (en) * | 2001-09-24 | 2002-06-26 | 宝山钢铁股份有限公司 | Two-way angle probe of supersonic flaw-detection for steel pipe |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2008-82864A 2008.04.10 |
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Owner name: JINING SHANKE TECHNOLOGY CONTROLLING CORPORATION, Free format text: FORMER OWNER: LASER INST., SHANDONG SCIENCE ACADEMY Effective date: 20130906 |
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Effective date of registration: 20130906 Address after: 272017 No. 123 Hongxing East Road, Shandong, Jining Patentee after: Shandong Academy of Sciences Laser Research Institute Jining Mountain Technology General Corporation Patentee after: Institute of metal research, Chinese Academy of Sciences Address before: 272017 No. 123 Hongxing East Road, Shandong, Jining Patentee before: Laser Inst., Shandong Science Academy Patentee before: Institute of metal research, Chinese Academy of Sciences |
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