CN101430291B - Double-wall double-projection imaging method in radial detection and its angle controller - Google Patents
Double-wall double-projection imaging method in radial detection and its angle controller Download PDFInfo
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- CN101430291B CN101430291B CN2007101899236A CN200710189923A CN101430291B CN 101430291 B CN101430291 B CN 101430291B CN 2007101899236 A CN2007101899236 A CN 2007101899236A CN 200710189923 A CN200710189923 A CN 200710189923A CN 101430291 B CN101430291 B CN 101430291B
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Abstract
The invention discloses a bi-directional projection method in ray detection. The method is characterized by comprising the steps as follows: 1, a detecting object is measured, including pipe external diameter, welding seam width and welding seam remaining height; 2, the calculation of transmitting illumination angle that is the angle between a welding seam highest point and pipe external wall is calculated by the measurement value of step 1; 3, ray injection direction is confirmed by an angle controller; 4, imaging, the position of a ray generator is confirmed according to the injection direction confirmed in step 3 for further transmitting illumination and imaging. The technical method effectively improves the welding seam defect detection rate greatly, reduces the labor intensity of detection personnel, improves the labor efficiency, reduces the consumption of negatives, saves the cost and improves the economic benefit; meanwhile the improvement of the sensitivity also reduces the probability of the defect beyond standard, thereby reducing the hidden trouble of the accident and being capable of effectively controlling the detection quality; and the method is applicable to the ray detection in omnidirectional pipe butt welding bi-directional projection imaging.
Description
Technical field
The present invention relates to a kind of in ray detection method and equipment thereof, especially relate to a kind of formation method and equipment thereof in the ray detection double-wall double-projection.
Background technology
At present, at present, in ray detection, control method to tubule butt-weld double-wall double-projection elliptic imaging mainly adopts the method for offset distance to finish the elliptic imaging of egative film, but the method is subjected to the restriction of many conditions: 1, Guan Jingtai is little, when wall thickness is too big, can't carry out.When 2, the locus is narrow and small, can't use.When 3, the position at pipe trend and weld seam place is undesirable, can't use.
The method of offset distance can't realize or the situation that is difficult to realize under ray detection have only the angle of employing transillumination to realize, in present the method is to realize by people's naked eyes, this method of judging with naked eyes has caused a large amount of underproof radiographic films, to these defective egative films must be once more transillumination again, the great amount of manpower financial resources have been wasted, missed optimum detection opportunity, incured loss through delay the duration of a project, made economic benefit be subjected to loss; Simultaneously also make detection sensitivity can not reach requirement, lowered the defective recall rate, make engineering imply potential safety hazard.
Summary of the invention
The objective of the invention is to overcome the defective of the deficiencies in the prior art and existence, finish angle orientation more accurately, increase substantially the ray detection method for quality, and a kind of instrument that can accurately take measurement of an angle is provided.
Purpose of the present invention can realize by following measure: a kind of in ray detection double-wall double-projection imaging method, it comprises following step:
1. the measurement of detected object: tube outer diameter D, weld width BE, weld reinforcement H;
2. the calculating of transillumination angle: calculate angle a between weld seam peak and the tube outer wall by step measured value 1.;
3. utilize angle controller to determine the ray shoots Inbound;
4. imaging: inject direction according to what 3. step was determined, determine the position of ray generator, and then the transillumination imaging.
The computing method of described step in 2. are:
a＝ctg
-1{(BE+CE)/(D+H)}
According to national technical standard, the scope of CE is between (3～10) mm.
A kind ofly comprise that for implementing the custom-designed angle controller of this method semicircle angle measuring tool is characterized in that: the round dot place at described semicircle angle measuring tool is provided with rotatable fixed pin; With rotatable fixed pin is end points, is provided with scalable pointer along the cambered surface direction of semicircle angle measuring tool.
On described scalable pointer, be provided with the fixed angle pin.
Described semicircle angle measuring tool is the angle measuring tool of aluminum.
The radius of semicircle angle measuring tool is 100mm～200mm.
The radius of semicircle angle measuring tool is 150mm.
Described scalable pointer maximum length surpasses the radius of semicircle angle measuring tool, is 200mm～600mm.
Base at described semicircle angle measuring tool is fixed with magnet piece with screw, and this magnet piece is an arc.
On the base of described semicircle angle measuring tool, be the center with the round dot, be provided with fixed band on its both sides.
Owing to adopt technique scheme, increase substantially defective recall rate in the weld seam effectively, increase substantially the qualification rate and the detection sensitivity of radiographic film; Reduce testing staff's labour intensity, raise labour efficiency; Reduce the egative film consumption greatly, save cost, increase economic efficiency; The raising of sensitivity has simultaneously also reduced the probability that exists of overproof defective, has lowered the hidden danger of accident, and economical and practical, easy to carry, simple operation, effectively the control detection quality is applicable to that comprehensive tube butt welding stitches the ray detection of double-wall double-projection imaging.
Description of drawings
Fig. 1 is the structural representation of angle controller of the present invention;
Fig. 2 is a transillumination angle calculation schematic diagram of the present invention;
Fig. 3 is caliber of the present invention and transillumination angle curve map;
Table 1 is caliber of the present invention and transillumination angle collation table.
Embodiment
Embodiment one
As shown in Figure 2, a kind of in ray detection double-wall double-projection imaging method, it comprises following step:
1. the measurement of detected object: tube outer diameter, weld width, weld reinforcement;
2. the calculating of transillumination angle: calculate angle between weld seam peak and the tube outer wall by step measured value 1.;
3. utilize angle controller to determine the ray shoots Inbound;
4. imaging: inject direction according to what 3. step was determined, determine the position of ray generator, and then the transillumination imaging.
The computing method of described step in 2. are:
a＝ctg
-1{(BE+CE)/(D+H)}
According to national technical standard, the scope of CE is between (3～10) mm.
Specifically, according to examination criteria: JB4730-2005 " bearing device Non-Destructive Testing " (a ray detection piece of writing) GB3323-2005 " steel melting butt-weld ray detection ".According to theoretical judgment, make following computation process:
After detected object was determined, tube outer diameter D, weld width BE, weld reinforcement H determined.Calculate transillumination angle a, promptly calculate the angle of cut a between weld seam peak and the tube outer wall:
AB＝D+H BC＝BE+CE
According to national technical standard, the scope of CE is between (3～10) mm
ctga＝BC/AB
a＝ctg
-1(BC/AB)
Through aforementioned calculation, can determine transillumination angle a.If get BE=10mm, calculate according to this, drawn as the caliber of table 1 and transillumination angle collation table with as caliber and the transillumination angle curve map of Fig. 3.
Table 1
Caliber of the present invention as shown in Figure 3 and transillumination angle curve map,
Curve b is a upper limit angle, i.e. BC=(10+3) mm;
Curve c is the center angle, i.e. BC=(10+5) mm;
Curve d is the lower limit angle, i.e. BC=(10+10) mm.
The structural representation of angle controller of the present invention as shown in Figure 1, it comprises semicircle angle measuring tool 1, is provided with rotatable fixed pin 4 at the round dot place of semicircle angle measuring tool 1; With rotatable fixed pin 4 is end points, is provided with scalable pointer 2 along the cambered surface direction of semicircle angle measuring tool 1.
On described scalable pointer 2, be provided with fixed angle pin 3.Described semicircle angle measuring tool 1 is the angle measuring tool of aluminum, and its radius is 100mm.Described scalable pointer 2 maximum lengths surpass the radius of semicircle angle measuring tool 1, are 200mm.
Embodiment two
As shown in Figure 2, a kind of in ray detection double-wall double-projection imaging method, it comprises following step:
1. the measurement of detected object: tube outer diameter, weld width, weld reinforcement;
2. the calculating of transillumination angle: use by the folder that step measured value 1. calculates between weld seam peak and the tube outer wall;
3. utilize angle controller to determine the ray shoots Inbound;
4. imaging: inject direction according to what 3. step was determined, determine the position of ray generator, and then the transillumination imaging.
The computing method of described step in 2. are:
a＝tg
-1{(D+H)/(BE+CE)}
According to national technical standard, the scope of CE is between (3～10) mm.
Specifically, according to examination criteria: JB4730-2005 " bearing device Non-Destructive Testing " (a ray detection piece of writing) GB3323-2005 " steel melting butt-weld ray detection ".According to theoretical judgment, make following computation process:
After detected object was determined, tube outer diameter D, weld width BE, weld reinforcement H determined.Calculate transillumination angle a, promptly calculate the angle of cut a between weld seam peak and the tube outer wall:
AB＝D+H BC＝BE+CE
According to national technical standard, the scope of CE is between (3～10) mm
tga＝AB/BC
a＝tg
-1(AB/BC)
Through aforementioned calculation, can determine transillumination angle a.If get BE=10mm, calculate according to this, drawn as the caliber of table 1 and transillumination angle collation table with as caliber and the transillumination angle curve map of Fig. 3.
Table 1
Caliber of the present invention as shown in Figure 3 and transillumination angle curve map,
Curve b is a upper limit angle, i.e. BC=(10+3) mm;
Curve c is the center angle, i.e. BC=(10+5) mm;
Curve d is the lower limit angle, i.e. BC=(10+10) mm.
The structural representation of angle controller of the present invention as shown in Figure 1, it comprises semicircle angle measuring tool 1, is provided with rotatable fixed pin 4 at the round dot place of semicircle angle measuring tool 1; With rotatable fixed pin 4 is end points, is provided with scalable pointer 2 along the cambered surface direction of semicircle angle measuring tool 1.
Described semicircle angle measuring tool 1 is the angle measuring tool of aluminum, and its radius is 130mm.Described scalable pointer 2 maximum lengths surpass the radius of semicircle angle measuring tool 1, are 300mm.
Embodiment three
As shown in Figure 2, a kind of in ray detection double-wall double-projection imaging method, it comprises following step:
1. the measurement of detected object: tube outer diameter, weld width, weld reinforcement;
2. the calculating of transillumination angle: calculate angle between weld seam peak and the tube outer wall by step measured value 1.;
3. utilize angle controller to determine the ray shoots Inbound;
4. imaging: inject direction according to what 3. step was determined, determine the position of ray generator, and then the transillumination imaging.
The computing method of described step in 2. are:
a＝tg
-1{(D+H)/(BE+CE)}
According to national technical standard, the scope of CE is between (3～10) mm.
Specifically, according to examination criteria: JB4730-2005 " bearing device Non-Destructive Testing " (a ray detection piece of writing) GB3323-2005 " steel melting butt-weld ray detection ".According to theoretical judgment, make following computation process:
After detected object was determined, tube outer diameter D, weld width BE, weld reinforcement H determined.Calculate transillumination angle a, promptly calculate the angle of cut a between weld seam peak and the tube outer wall:
AB＝D+H BC＝BE+CE
According to national technical standard, the scope of CE is between (3～10) mm
tga＝AB/BC
a＝tg
-1(AB/BC)
Through aforementioned calculation, can determine transillumination angle a.If get BE=10mm, calculate according to this, drawn as the caliber of table 1 and transillumination angle collation table with as caliber and the transillumination angle curve map of Fig. 3.
Table 1
Caliber of the present invention as shown in Figure 3 and transillumination angle curve map,
Curve b is a upper limit angle, i.e. BC=(10+3) mm;
Curve c is the center angle, i.e. BC=(10+5) mm;
Curve d is the lower limit angle, i.e. BC=(10+10) mm.
The structural representation of angle controller of the present invention as shown in Figure 1, it comprises semicircle angle measuring tool 1, is provided with rotatable fixed pin 4 at the round dot place of semicircle angle measuring tool 1; With rotatable fixed pin 4 is end points, is provided with scalable pointer 2 along the cambered surface direction of semicircle angle measuring tool 1.
Described semicircle angle measuring tool 1 is the angle measuring tool of aluminum, and its radius is 150mm.Described scalable pointer 2 maximum lengths surpass the radius of semicircle angle measuring tool 1,400mm.
Embodiment four
As shown in Figure 2, a kind of in ray detection double-wall double-projection imaging method, it comprises following step:
1. the measurement of detected object: tube outer diameter, weld width, weld reinforcement;
2. the calculating of transillumination angle: calculate angle between weld seam peak and the tube outer wall by step measured value 1.;
3. utilize angle controller to determine the ray shoots Inbound;
4. imaging: inject direction according to what 3. step was determined, determine the position of ray generator, and then the transillumination imaging.
The computing method of described step in 2. are:
a＝tg
-1{(D+H)/(BE+CE)}
According to national technical standard, the scope of CE is between (3～10) mm.
Described step computing method 2. can also be other suitable forms:
a＝sin
-1(AB/AC)
Or a=cos
-1(BC/AC)
Specifically, according to examination criteria: JB4730-2005 " bearing device Non-Destructive Testing " (a ray detection piece of writing) GB3323-2005 " steel melting butt-weld ray detection ".According to theoretical judgment, make following computation process:
After detected object was determined, tube outer diameter D, weld width BE, weld reinforcement H determined.Calculate transillumination angle a, promptly calculate the angle of cut a between weld seam peak and the tube outer wall:
AB＝D+H BC＝BE+CE
According to national technical standard, the scope of CE is between (3～10) mm
tga＝AB/BC
a＝tg
-1(AB/BC)
Through aforementioned calculation, can determine transillumination angle a.If get BE=10mm, calculate according to this, drawn as the caliber of table 1 and transillumination angle collation table with as caliber and the transillumination angle curve map of Fig. 3.
Table 1
Caliber of the present invention as shown in Figure 3 and transillumination angle curve map,
Curve b is a upper limit angle, i.e. BC=(10+3) mm;
Curve c is the center angle, i.e. BC=(10+5) mm;
Curve d is the lower limit angle, i.e. BC=(10+10) mm.
The structural representation of angle controller of the present invention as shown in Figure 1, it comprises semicircle angle measuring tool 1, is provided with rotatable fixed pin 4 at the round dot place of semicircle angle measuring tool 1; With rotatable fixed pin 4 is end points, is provided with scalable pointer 2 along the cambered surface direction of semicircle angle measuring tool 1.
Described semicircle angle measuring tool 1 is the angle measuring tool of aluminum, and its radius is 200mm.Described scalable pointer 2 maximum lengths surpass the radius of semicircle angle measuring tool 1, are 600mm.
And the base at semicircle angle measuring tool 1 is fixed with magnet piece 5 with screw 6, and magnet piece 5 is an arc.On the base of described semicircle angle measuring tool 1, be the center with the round dot, be provided with fixed band 7 on its both sides.
Specifically, when ray detection, with angle controller be adsorbed on detect on the weld seam, angle value as required stretches scalable pointer 2 and determines its angle value, this moment, the direction of scalable pointer 2 indications was the direction that ray is injected.Fixed angle pin 3 is fixed on scalable pointer 2 on the angle measuring tool 1, is convenient for measuring.Thus, according to the situation of locus, scalable pointer 2 can accurately be made the position of ray generator.
Arc-shaped magnet 5 can be adsorbed on angle controller on the detected object.Simultaneously, because the difference of detected object, what arc-shaped magnet can not be firm is adsorbed on angle controller on the detected object, at this moment, fixed band system can be tied up on detected object convenient the detection.
Claims (1)
1. double-wall double-projection imaging method in ray detection, it is characterized in that: it comprises following step:
1. between the measurement of detected object: tube outer diameter D, weld seam center line and the steel pipe face of weld apart from BE, weld reinforcement H;
2. the calculating of transillumination angle: calculate angle a between angle controller ray shoots Inbound and the tube outer wall by step measured value 1.,
Its computing method are a=ctg
-1{ (BE+CE)/(D+H) }, according to national technical standard, the scope of CE is between (3～10) mm;
3. utilize angle controller to determine the ray shoots Inbound: described angle controller is semicircle angle measuring tool (1), is provided with rotatable fixed pin (4) at the round dot place of semicircle angle measuring tool (1); With rotatable fixed pin (4) is end points, is provided with scalable pointer (2) along the cambered surface direction of semicircle angle measuring tool (1); During use, with angle controller be adsorbed on detect on the weld seam, according to angle a, scalable pointer (2) stretched and determine its angle value, this moment, the direction of scalable pointer (2) indication was the direction that ray is injected;
4. imaging: inject direction according to what 3. step was determined, determine the position of ray generator, and then the transillumination imaging.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101899236A CN101430291B (en) | 2007-11-06 | 2007-11-06 | Double-wall double-projection imaging method in radial detection and its angle controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101899236A CN101430291B (en) | 2007-11-06 | 2007-11-06 | Double-wall double-projection imaging method in radial detection and its angle controller |
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| CN101430291A CN101430291A (en) | 2009-05-13 |
| CN101430291B true CN101430291B (en) | 2011-06-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102608139A (en) * | 2012-03-04 | 2012-07-25 | 茂名重力石化机械制造有限公司 | Radiographic detection method for welding joint of outer tube sleeved with inner tube |
| CN108132265B (en) * | 2017-12-29 | 2020-10-30 | 日照朝一科技创新发展有限公司 | Small-diameter tube X-ray photography elliptical projection positioner |
| CN110736758B (en) * | 2019-10-18 | 2022-04-19 | 西安航天动力机械有限公司 | Method for determining head welding seam transillumination arrangement parameters |
| CN111122621B (en) * | 2019-12-04 | 2022-07-05 | 中国工程物理研究院机械制造工艺研究所 | Method for detecting defect position of workpiece by adopting ray double-wall transillumination technology |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2149627Y (en) * | 1992-12-11 | 1993-12-15 | 伊宪余 | Pipe welding seam ray transillumination elliptical imaging indicator |
| CN201107283Y (en) * | 2007-11-06 | 2008-08-27 | 宋全轩 | Angle controller in ray detection |
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2007
- 2007-11-06 CN CN2007101899236A patent/CN101430291B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2149627Y (en) * | 1992-12-11 | 1993-12-15 | 伊宪余 | Pipe welding seam ray transillumination elliptical imaging indicator |
| CN201107283Y (en) * | 2007-11-06 | 2008-08-27 | 宋全轩 | Angle controller in ray detection |
Non-Patent Citations (2)
| Title |
|---|
| JP特开平10-38818A 1998.02.13 |
| 王秀峰.小径薄壁管射线透照布置方法.《工业安全与环保》.2003,第29卷(第8期), * |
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