CN104569007A - Thick-wall pipeline butt-welding seam center exposure device - Google Patents
Thick-wall pipeline butt-welding seam center exposure device Download PDFInfo
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- CN104569007A CN104569007A CN201510054907.0A CN201510054907A CN104569007A CN 104569007 A CN104569007 A CN 104569007A CN 201510054907 A CN201510054907 A CN 201510054907A CN 104569007 A CN104569007 A CN 104569007A
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- straight tube
- sides pipeline
- exposure device
- posted sides
- butt
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- 238000003466 welding Methods 0.000 title description 2
- 230000005251 gamma ray Effects 0.000 claims abstract description 11
- 238000001514 detection method Methods 0.000 claims description 18
- 239000002775 capsule Substances 0.000 claims description 17
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 230000035945 sensitivity Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000007689 inspection Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000002285 radioactive effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
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- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The invention relates to a thick-wall pipeline butt-joint weld center exposure device, which comprises an arc-shaped pipe used for guiding a source conveying pipe of a gamma-ray flaw detector, wherein the arc-shaped pipe is formed by sequentially connecting a first straight pipe, a bent pipe and a second straight pipe, the free end of the first straight pipe is positioned at the geometric center of a butt-joint weld of a thick-wall pipeline, the free end of the second straight pipe penetrates through a preset through hole of the thick-wall pipeline, and through the arrangement of the arc-shaped pipe, a gamma source can be effectively conveyed to the position of the center of the weld for exposure, so that the exposure time can be greatly shortened, and the gamma-ray operation efficiency; the first straight pipe and the second straight pipe of the arc-shaped pipe are both telescopic pipes, so that the application range is wider; the preset through hole is an existing instrument hole or a three-way port in the thick-wall pipeline, extra holes are not needed, and the cost is reduced.
Description
Technical field
The present invention relates to Nondestructive Testing Techniques for Special Equipment field, particularly relate to posted sides pipeline butt-weld center exposure device.
Background technology
In petrochemical complex, power construction installation work, wall thickness is more and more extensive more than the high pressure posted sides pipeline application of 35mm, ray detection detects the important means of posted sides pipeline welding quality, for this type of detected object, because caliber is little, add that the pipeline in engineering reality is having many bends or curves, elbow, threeway, valve, connect much first-class, staff cannot enter pipeline, can only adopt the arrangement of double-walled list shadow, thus materially increases the difficulty of radiographic inspection.If adopt X ray For Double-wall Single-image Radiographic Inspection, scanning thickness is no more than 70mm, and flaw detection efficiency is extremely low, cannot meet the needs of project progress.In addition because X-ray production apparatus is in high loaded process state for a long time in flaw detection, therefore the failure rate of equipment is high, and these reasons make X-ray production apparatus cannot complete separately the radiographic inspection of posted sides pipeline weld bond.Consider the advantages such as gamma ray projector scanning thickness is large, penetration capacity is strong, equipment failure rate is low, γ source double-walled list shadow is now also often adopted to detect, according to flaw detection experience in the past, during for scanning thickness T >=20mm-25mm, select source strength about 50ci, as T >=25mm-30mm, select source strength about 65ci, as T >=30 ㎜-40 ㎜, select source strength about 80ci.So still, there is a lot of problem: one is detection time or longer, and two is that detection sensitivity is poor, three is that security protection distance is larger.
Summary of the invention
For the problem of prior art, the object of the present invention is to provide a kind of posted sides pipeline butt-weld center exposure device, it can significantly shorten ray detection reagent, provides work efficiency, and improves ray detection sensitivity.
For achieving the above object, the present invention adopts following technical scheme:
Posted sides pipeline butt-weld center exposure device, comprise the curved pipe of the defeated source capsule for guiding gamma-ray detection apparatus, described curved pipe is connected and composed successively by the first straight tube, bend pipe and the second straight tube, the free end of the first straight tube is positioned at the geometric center of the butt-weld of posted sides pipeline, and the free end of the second straight tube is piercing in the default through hole of described posted sides pipeline.
Preferably, the extended line of the first straight tube and the extended line of the second straight tube mutually vertical.
Preferably, the arc length of described bend pipe is quadrant.
Preferably, the outer wall of described first straight tube is provided with at least one draw-in groove, each draw-in groove is connected with one for the location-plate of the contact internal walls with posted sides pipeline.
Preferred further, described location-plate is made up of rubber or plastics.
Preferably, the first straight tube and the second straight tube are draw-tube.
Preferably, described default through hole is instrument hole or three ports.
Compared to existing technology, beneficial effect of the present invention is:
Change the For Double-wall Single-image Radiographic Inspection technique of posted sides pipeline into single wall center transillumination, by the setting of curved pipe, effectively γ source can be delivered to the position exposure of Weld pipe mill, significantly can shorten the time shutter, improve gamma-rays operating efficiency and detection sensitivity; First straight tube and second straight tube of curved pipe are draw-tube, and usable range is wider; Default through hole is existing instrument hole or three ports on posted sides pipeline, no longer needs extra openings, reduces cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiments of the invention.
Wherein, 1, gamma-ray detection apparatus; 11, defeated source capsule; 2, curved pipe; 21, the first straight tube; 22, bend pipe; 23, the second straight tube; 3, posted sides pipeline; 4, butt-weld; 5, through hole is preset; 6, location-plate.
Embodiment
Below, by reference to the accompanying drawings and embodiment, the present invention is described further.
See Fig. 1, the present embodiment posted sides pipeline butt-weld center exposure device adopts the mode of single wall center transillumination, it comprises the curved pipe 2 of the defeated source capsule 11 for guiding gamma-ray detection apparatus 1, curved pipe 2 is by the first straight tube 21, bend pipe 22 and the second straight tube 23 connect and compose successively, the free end of the first straight tube 21 is positioned at the geometric center of the butt-weld 4 of posted sides pipeline 3, the free end of the second straight tube 23 is piercing in the default through hole 5 of posted sides pipeline 3, by the setting of curved pipe 2, effectively the gamma ray projector of gamma-ray detection apparatus 1 can be delivered to the center exposure of butt-weld 4 by defeated source capsule 11, significantly can shorten the time shutter, improve gamma-rays operating efficiency and detection sensitivity.As a kind of optimal way, the extended line of the first straight tube 21 is mutually vertical with the extended line of the second straight tube 23, the angle that the angle of the extended line of the first straight tube 21 and the extended line of the second straight tube 23 also can adopt other suitable according to practical service environment; The cross section of preferred curved pipe 2 is circle, and the internal diameter of curved pipe 2 is a bit larger tham the external diameter of defeated source capsule 11, facilitates defeated source capsule 11 to pass through.The arc length of bend pipe 22 is preferably quadrant, and the radius-of-curvature size of bend pipe 22 guarantees that defeated source capsule can pass through.
Presetting through hole 5 be existing instrument hole or three ports on posted sides pipeline 3, do not need to coordinate the device of the present embodiment to use and additionally specially perforate, is to a certain degree saving time and cost.
The outer wall of the first straight tube 21 is provided with at least one draw-in groove, each draw-in groove is connected with one for the location-plate 6 of the contact internal walls with posted sides pipeline 3.The quantity and spacing of location-plate 6 can be determined according to actual needs, and location-plate 6 is preferably circular slab, and its external diameter size is mated with the internal diameter of posted sides pipeline 3, and the periphery of location-plate 6 and posted sides pipeline 3 contact internal walls, it plays the supporting and location effect to the first straight tube 21.The location-plate 6 of the present embodiment preferably adopts rubber or plastics to make, and the location-plate 6 that other materials is made compared by rubber location-plate with plastics location-plate, can keep stable, plays and supports fixing effect, and convenient distortion again, so conveniently installs and uses simultaneously.Offer an aperture at the center of location-plate 6, the free end that this aperture is used for the first straight tube 21 passes through, and guarantees that the free end of the first straight tube 21 aims at the geometric center of butt-weld 4, ensures that the scheme of the present embodiment is effectively carried out.
Because curved pipe 2 needs to be installed in posted sides pipeline 3, conveniently install, first straight tube 21 and the second straight tube 23 all adopt the mode of draw-tube, realization can according to the survey instrument of prior art the data such as distance knowing the external diameter of posted sides pipeline 3, internal diameter, butt-weld 4 geometric center and default through hole, according to these data adjustable first straight tube 21, second straight tubes 23 to suitable size.
The beneficial effect of the present embodiment is:
Use the posted sides pipeline butt-weld center exposure device of the present embodiment, through curved pipe 2 by defeated source capsule 11, center radioactive source being delivered to butt-weld 4 by gamma-ray detection apparatus 1 is again detected, owing to there being the setting of curved pipe 2, the center exposure that effectively γ source can be delivered to butt-weld 4 significantly shortens the time shutter, improve gamma-rays operating efficiency and detection sensitivity, and suitably can reduce radioactive source activity, reduce radiocontamination, shorten security protection distance, ensure personal security; First straight tube 21 of curved pipe 2 and the second straight tube 23 are draw-tube, and usable range is wider; Presetting through hole 5 is existing instrument hole or three ports on posted sides pipeline 3, no longer needs extra openings, reduces cost; Location-plate 6 pairs of curved pipes 2 play and support fixing effect, guarantee that defeated source capsule 11 is through the geometric center facing to butt-weld 4 after curved pipe, ensure that testing quality.
During operation, measure external diameter and the internal diameter of posted sides pipeline 3, butt-weld 4 center is to the distance presetting through hole 5 center, preset the height on through hole 5 surface to posted sides pipeline 3 surface, regulate the length of the first straight tube 21 and the second straight tube 23, the location-plate 6 of suitable dimension is inserted in the draw-in groove of the first straight tube 21, by defeated source capsule 11 successively through the second straight tube 23, bend pipe 22, first straight tube 21, the photohead end of defeated source capsule 11 is stretched out from the free end of the first straight tube 21, and the exposure head of defeated source capsule 11 is fixed on the home position of the first straight tube 21 free end, curved pipe 2 is put into posted sides pipeline 3 together with defeated source capsule 11, the photohead end of defeated source capsule 11 is made to be in butt-weld 4 center, the free end of the second straight tube 23 is fixed on the center of default through hole 5.Defeated source capsule 11 is fixed with the free end of the second straight tube 23 of curved pipe, so, just can, according to gamma-ray detection apparatus 1 working specification, drive radioactive source to implement radiograph test to defeated source capsule 11 photohead end position.
For a person skilled in the art, according to technical scheme described above and design, other various corresponding change and distortion can be made, and all these change and distortion all should belong within the protection domain of the claims in the present invention.
Claims (7)
1. posted sides pipeline butt-weld center exposure device, it is characterized in that, comprise the curved pipe of the defeated source capsule for guiding gamma-ray detection apparatus, described curved pipe is connected and composed successively by the first straight tube, bend pipe and the second straight tube, the free end of the first straight tube is positioned at the geometric center of the butt-weld of posted sides pipeline, and the free end of the second straight tube is piercing in the default through hole of described posted sides pipeline.
2. posted sides pipeline butt-weld center exposure device as claimed in claim 1, it is characterized in that, the extended line of the first straight tube is mutually vertical with the extended line of the second straight tube.
3. posted sides pipeline butt-weld center exposure device as claimed in claim 1, it is characterized in that, the arc length of described bend pipe is quadrant.
4. posted sides pipeline butt-weld center exposure device as claimed in claim 1, it is characterized in that, the outer wall of described first straight tube is provided with at least one draw-in groove, each draw-in groove is connected with one for the location-plate of the contact internal walls with posted sides pipeline.
5. posted sides pipeline butt-weld center exposure device as claimed in claim 4, it is characterized in that, described location-plate is made up of rubber or plastics.
6. posted sides pipeline butt-weld center exposure device as claimed in claim 1, it is characterized in that, the first straight tube and the second straight tube are draw-tube.
7. posted sides pipeline butt-weld center exposure device as claimed in claim 1, it is characterized in that, described default through hole is instrument hole or three ports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510054907.0A CN104569007B (en) | 2015-01-30 | 2015-01-30 | Thick-wall pipeline butt-welding seam center exposure device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510054907.0A CN104569007B (en) | 2015-01-30 | 2015-01-30 | Thick-wall pipeline butt-welding seam center exposure device |
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| CN104569007A true CN104569007A (en) | 2015-04-29 |
| CN104569007B CN104569007B (en) | 2018-02-02 |
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| CN201510054907.0A Active CN104569007B (en) | 2015-01-30 | 2015-01-30 | Thick-wall pipeline butt-welding seam center exposure device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110018185A (en) * | 2019-04-04 | 2019-07-16 | 岭澳核电有限公司 | Nuclear power station weld radiographic inspection center exposure device and radiographic inspection method |
| CN110174420A (en) * | 2019-06-12 | 2019-08-27 | 中国华电科工集团有限公司 | A kind of lossless detection method and flaw detection hole closeouts of thermal power plant's pipeline-weld |
| CN112345561A (en) * | 2020-11-12 | 2021-02-09 | 东方电气集团东方汽轮机有限公司 | Effective flaw detection method for nuclear power welding rotor |
| CN112730467A (en) * | 2020-12-22 | 2021-04-30 | 福建福清核电有限公司 | Central method radiographic inspection positioning method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110018185A (en) * | 2019-04-04 | 2019-07-16 | 岭澳核电有限公司 | Nuclear power station weld radiographic inspection center exposure device and radiographic inspection method |
| CN110174420A (en) * | 2019-06-12 | 2019-08-27 | 中国华电科工集团有限公司 | A kind of lossless detection method and flaw detection hole closeouts of thermal power plant's pipeline-weld |
| CN112345561A (en) * | 2020-11-12 | 2021-02-09 | 东方电气集团东方汽轮机有限公司 | Effective flaw detection method for nuclear power welding rotor |
| CN112345561B (en) * | 2020-11-12 | 2022-05-10 | 东方电气集团东方汽轮机有限公司 | Effective flaw detection method for nuclear power welding rotor |
| CN112730467A (en) * | 2020-12-22 | 2021-04-30 | 福建福清核电有限公司 | Central method radiographic inspection positioning method |
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| Publication number | Publication date |
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| CN104569007B (en) | 2018-02-02 |
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