CN112763576A - Method for more accurately positioning UT defect of fillet weld of drum plug-in type connecting pipe - Google Patents
Method for more accurately positioning UT defect of fillet weld of drum plug-in type connecting pipe Download PDFInfo
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- CN112763576A CN112763576A CN202011609139.8A CN202011609139A CN112763576A CN 112763576 A CN112763576 A CN 112763576A CN 202011609139 A CN202011609139 A CN 202011609139A CN 112763576 A CN112763576 A CN 112763576A
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- defect
- fillet weld
- probe
- flat
- marking
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- 230000007547 defect Effects 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000000523 sample Substances 0.000 claims abstract description 23
- 238000000605 extraction Methods 0.000 claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/24—Probes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
- G01N29/4409—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by comparison
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0234—Metals, e.g. steel
Abstract
The invention provides a method for more accurately positioning UT defects of a fillet weld of a drum plug-in type connecting pipe. The method for more accurately positioning the UT defect of the fillet weld of the boiler barrel plug-in type connecting pipe comprises the following steps: s1: taking a test plate with a cambered surface from the curved surface of the boiler barrel, and manufacturing defects with different depths and known sizes; s2: measuring the actual depth and position of each defect by using a straight probe, and marking; s3: equally dividing and marking the flat bottom holes; s4: detecting the flat-bottom hole along the marked line by using an inclined probe, determining an incident point of the probe, and performing shape extraction between the incident point of the probe and a reflection point of the flat-bottom hole by using a shape extraction gauge and marking; s5: drawing is carried out according to the sound path s and the incidence angle beta displayed by the instrument, and the depth value h of the reflection hole is measured by using a straight ruler. The method for more accurately positioning the UT defect of the boiler barrel plug-in type connecting pipe fillet weld provided by the invention has the advantages of simple steps and high accuracy.
Description
Technical Field
The invention relates to the technical field of positioning, in particular to a method for more accurately positioning UT defects of a boiler barrel plug-in type connecting pipe fillet weld.
Background
When ultrasonic detection is carried out on the fillet weld of the plug-in type connecting pipe of the boiler barrel body, the defect that the included angle between the fillet weld and the axis of the barrel body is in the range of 0-90 degrees is caused, and because the curvature of the curved surface is different along with the difference of the incident points of the probe, a curved surface correction formula cannot be directly adopted, so that the defect is difficult to accurately position, the defect repair difficulty is improved, the workload is increased, and even the defect repair is finished by several times of repair. This has been an unsolved problem for a long time.
Therefore, there is a need to provide a new method for more accurately positioning the UT defect of the drum plug-in type pipe fillet weld.
Disclosure of Invention
The invention solves the technical problem of providing a method for more accurately positioning the UT defect of the boiler barrel plug-in type connecting pipe fillet weld with simple steps and high accuracy.
In order to solve the technical problem, the method for more accurately positioning the UT defect of the boiler barrel plug-in type connecting pipe fillet weld comprises the following steps:
s1: taking a test plate with a cambered surface from the curved surface of the boiler barrel, and manufacturing defects with different depths and known sizes;
s2: measuring the actual depth and position of each defect by using a straight probe, and marking; measuring and recording the front edge L and the incident angle beta of the straight probe;
s3: equally dividing and marking the flat bottom holes;
s4: detecting the flat-bottom hole along the marked line by using an inclined probe, determining an incident point of the probe, and performing shape extraction between the incident point of the probe and a reflection point of the flat-bottom hole by using a shape extraction gauge and marking;
s5: drawing according to the sound path s and the incidence angle beta displayed by the instrument, and measuring the depth value h of the reflection hole by using a straight ruler;
s6: comparing the plotting value, the instrument display value and the actual value to draw a conclusion.
Preferably, the size of the curved surface in step S1 is Φ 1600mm × 100mm, and the size of the test board is 300mm × 300 mm.
Preferably, the different depth and size defects in step S1 are a plurality of flat-bottom holes machined in the radial direction, and the depth of the flat-bottom holes is 10mm-75 mm.
Preferably, the number of the flat-bottom holes is 4, the flat-bottom hole phi is 5mm, and the diameter of the flat-bottom hole is counted from the inner circle surface: the depths were 10mm, 25mm, 50mm, and 75mm, respectively.
Preferably, in the step S3, the flat-bottom holes are equally divided and labeled every 10 ° within the range of 0 ° to 90 ° from the cylinder axis.
Preferably, the inclined probe in the step S4 is 2.5P13 × 13K1, 2.5P13 × 13K1.5, 2.5P13 × 13K2, 5P9 × 9K 2.
Compared with the prior art, the method for more accurately positioning the UT defect of the boiler barrel plug-in type connecting pipe fillet weld has the following beneficial effects:
the invention provides a method for more accurately positioning UT defects of a fillet weld of a boiler barrel plug-in type connecting pipe, which comprises the steps of taking a curved surface test plate from a boiler barrel, manufacturing the defects with known positions and sizes at different depths, carrying out ultrasonic flaw detection on the test plate, using a drawing method to obtain the positions of the defects by means of a shape gauge, and then comparing the positions with the actual positions of the defects, thereby summarizing the detection positions and the detection method of the defects at different angles and depth ranges.
Detailed Description
The present invention will be further described with reference to the following embodiments.
A method for more accurately positioning UT defects of a boiler barrel plug-in type connecting pipe fillet weld comprises the following steps:
s1: taking a test plate with a cambered surface from the curved surface of the boiler barrel, and manufacturing defects with different depths and known sizes;
s2: measuring the actual depth and position of each defect by using a straight probe, and marking; measuring and recording the front edge L and the incident angle beta of the straight probe;
s3: equally dividing and marking the flat bottom holes;
s4: detecting the flat-bottom hole along the marked line by using an inclined probe, determining an incident point of the probe, and performing shape extraction between the incident point of the probe and a reflection point of the flat-bottom hole by using a shape extraction gauge and marking;
s5: drawing according to the sound path s and the incidence angle beta displayed by the instrument, and measuring the depth value h of the reflection hole by using a straight ruler;
s6: comparing the plotting value, the instrument display value and the actual value to draw a conclusion.
The size of the curved surface in the step S1 is Φ 1600mm × 100mm, and the size of the test board is 300mm × 300 mm.
The different depth and size defects in the step S1 are a plurality of flat-bottom holes machined along the radial direction, and the depth of the flat-bottom holes is 10mm-75 mm.
The number of the flat bottom holes is 4, the diameter of the flat bottom hole is phi 5mm, and the diameter is counted from the inner circle surface: the depths were 10mm, 25mm, 50mm, and 75mm, respectively.
And in the step S3, the flat-bottom holes are equally divided and marked every 10 degrees within the range of 0-90 degrees of included angle with the axis of the cylinder body.
The inclined probe in the step S4 is 2.5P13 × 13K1, 2.5P13 × 13K1.5, 2.5P13 × 13K2, 5P9 × 9K 2.
Compared with the prior art, the method for more accurately positioning the UT defect of the boiler barrel plug-in type connecting pipe fillet weld has the following beneficial effects:
the invention provides a method for more accurately positioning UT defects of a fillet weld of a boiler barrel plug-in type connecting pipe, which comprises the steps of taking a curved surface test plate from a boiler barrel, manufacturing the defects with known positions and sizes at different depths, carrying out ultrasonic flaw detection on the test plate, using a drawing method to obtain the positions of the defects by means of a shape gauge, and then comparing the positions with the actual positions of the defects, thereby summarizing the detection positions and the detection method of the defects at different angles and depth ranges.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. A method for more accurately positioning UT defects of a boiler barrel plug-in type connecting pipe fillet weld is characterized by comprising the following steps:
s1: taking a test plate with a cambered surface from the curved surface of the boiler barrel, and manufacturing defects with different depths and known sizes;
s2: measuring the actual depth and position of each defect by using a straight probe, and marking; measuring and recording the front edge L and the incident angle beta of the straight probe;
s3: equally dividing and marking the flat bottom holes;
s4: detecting the flat-bottom hole along the marked line by using an inclined probe, determining an incident point of the probe, and performing shape extraction between the incident point of the probe and a reflection point of the flat-bottom hole by using a shape extraction gauge and marking;
s5: drawing according to the sound path s and the incidence angle beta displayed by the instrument, and measuring the depth value h of the reflection hole by using a straight ruler;
s6: comparing the plotting value, the instrument display value and the actual value to draw a conclusion.
2. The method for more accurately locating the UT defect in a drum plunge nozzle fillet weld of claim 1 wherein the curved surface of step S1 is phi 1600mm x 100mm in size and the test panel is 300mm x 300mm in size.
3. The method for more accurately locating the UT defect in a drum plunge joint fillet weld of claim 1 wherein the different depth, size defects of step S1 are a plurality of flat bottom holes machined in a radial direction, the flat bottom holes having a depth of 10mm to 75 mm.
4. A method for more accurately locating the UT defect in the drum plunge nozzle fillet weld according to claim 3 wherein the number of the flat bottom holes is 4, the flat bottom hole Φ 5mm, noted from the inner circle: the depths were 10mm, 25mm, 50mm, and 75mm, respectively.
5. The method for more accurately locating the UT defect of the fillet weld of the inserted connection pipe of the boiler barrel as claimed in claim 1, wherein the flat bottom holes are equally divided and marked every 10 degrees within the range of 0-90 degrees from the axis of the barrel in the step S3.
6. The method for more accurately locating the UT defect in a drum plunge joint fillet weld of claim 1, wherein the angle probes in the step S4 are 2.5P13 x 13K1, 2.5P13 x 13K1.5, 2.5P13 x 13K2, 5P9 x 9K 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011609139.8A CN112763576A (en) | 2020-12-30 | 2020-12-30 | Method for more accurately positioning UT defect of fillet weld of drum plug-in type connecting pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011609139.8A CN112763576A (en) | 2020-12-30 | 2020-12-30 | Method for more accurately positioning UT defect of fillet weld of drum plug-in type connecting pipe |
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| Publication Number | Publication Date |
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| CN112763576A true CN112763576A (en) | 2021-05-07 |
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| CN202011609139.8A Pending CN112763576A (en) | 2020-12-30 | 2020-12-30 | Method for more accurately positioning UT defect of fillet weld of drum plug-in type connecting pipe |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1223374A (en) * | 1997-11-17 | 1999-07-21 | 北京电力科学研究院 | Ultrasonic flaw detector and method for small diameter pipe welded joint |
| CN102721742A (en) * | 2012-06-21 | 2012-10-10 | 中铁宝桥（扬州）有限公司 | Ultrasonic flaw detection method of weld joint at U-shaped angle of rib of steel bridge plate unit |
| CN103439408A (en) * | 2013-08-20 | 2013-12-11 | 北京巴布科克·威尔科克斯有限公司 | Ultrasonic detection method for weld joint of small-caliber pipe shelf angle |
| CN104914164A (en) * | 2015-05-21 | 2015-09-16 | 南京理工大学 | DAC curve-based supersonic wave C scanning imaging method |
| CN110441389A (en) * | 2019-07-16 | 2019-11-12 | 安徽扬天金塑新能源装备股份公司 | A kind of big fillet ultrasonic test method of high-pressure bottle |
-
2020
- 2020-12-30 CN CN202011609139.8A patent/CN112763576A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1223374A (en) * | 1997-11-17 | 1999-07-21 | 北京电力科学研究院 | Ultrasonic flaw detector and method for small diameter pipe welded joint |
| CN102721742A (en) * | 2012-06-21 | 2012-10-10 | 中铁宝桥（扬州）有限公司 | Ultrasonic flaw detection method of weld joint at U-shaped angle of rib of steel bridge plate unit |
| CN103439408A (en) * | 2013-08-20 | 2013-12-11 | 北京巴布科克·威尔科克斯有限公司 | Ultrasonic detection method for weld joint of small-caliber pipe shelf angle |
| CN104914164A (en) * | 2015-05-21 | 2015-09-16 | 南京理工大学 | DAC curve-based supersonic wave C scanning imaging method |
| CN110441389A (en) * | 2019-07-16 | 2019-11-12 | 安徽扬天金塑新能源装备股份公司 | A kind of big fillet ultrasonic test method of high-pressure bottle |
Non-Patent Citations (1)
| Title |
|---|
| 邹晶;李;李生田;: "压力容器接管角焊缝超声波探伤", 焊接, no. 03, 31 December 1992 (1992-12-31), pages 2 - 8 * |
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