CN104833683B - A kind of gamma-ray testing apparatus - Google Patents
A kind of gamma-ray testing apparatus Download PDFInfo
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- CN104833683B CN104833683B CN201510244520.1A CN201510244520A CN104833683B CN 104833683 B CN104833683 B CN 104833683B CN 201510244520 A CN201510244520 A CN 201510244520A CN 104833683 B CN104833683 B CN 104833683B
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Abstract
The present invention relates to a kind of gamma-ray testing apparatus, including gamma-ray detection apparatus, defeated source capsule, focus adjustment pipe, orientation photohead and stereotype shielding ring；One end of the defeated source capsule is connected with gamma-ray detection apparatus, and the other end of the defeated source capsule is connected by focus adjustment pipe with orientation photohead；The focus adjustment pipe is screwed onto on stereotype shielding ring, and the orientation photohead is located at the inside of stereotype shielding ring in order to irradiate the position to be detected a flaw of pipe under test；The stereotype shielding ring is fixedly attached to outside pipe under test, between the stereotype shielding ring and pipe under test be equipped with for be wrapped in pipe under test position both sides to be detected a flaw the first lead rubber；The second lead rubber is enclosed on the outside of the defeated source capsule and on the outside of focus adjustment pipe.The present invention can effectively reduce radiation scope, security performance higher, and use is more convenient, especially the radiation level except 2m ranges can be caused to be substantially at safe range.
Description
Technical field
The present invention relates to a kind of non-destructive testing technology, particularly a kind of gamma-ray testing apparatus.
Background technology
Non-destructive testing is the essential effective tool of industrial development, reflects a national industry to a certain extent
Development level, importance have gained public acceptance.Ray detection act as one kind in lossless detection method, and common method has
X-ray procedure, gamma-ray examination, high-energy ray is examined and neutron ray is examined.For the inspection of common industrial x-ray, one
As use X-ray procedure and gamma-ray examination.
For petrochemical plant, due to the operation operating mode of the harshness such as burn into high temperature and pressure of working media, medium pair
The erosive wear of equipment pipe, inevitably resulting in equipment wall thickness reduction, internal flaw extension etc. causes pipe perforation or broken
It splits.Once such accident occurs, it usually needs temporary parking is implemented to device and carries out rush repair, this is further to preventing accident
Expand, ensure that the operational safety of petrochemical equipment is most important.But the economic benefit of production unit can be made by stopping in emergency
Into larger loss, thus there is an urgent need to be completed with most fast speed to the ray detection of weld seam so as to as early as possible after rush repair
Recovery device drives to produce.But the pipeline of petrochemical plant gathers, narrow space, can not usually implement X-ray detection and
Radioactive source must be used to carry out transillumination, and ray detection can cause ambient enviroment radiation pollution, usual γ source radiations protection half
Diameter reaches more than 30m, it is meant that the non-ray operating personnel in this protective range must withdraw, this fills daytime and production
It is typically unpractical for putting, it is therefore necessary to radiation protection range is reduced as possible by every means, it is existing universal not changing
In the case of general gamma-ray detection apparatus structure, developing the smaller gamma-rays detection exposure device of radiation scope undoubtedly has weight
The realistic meaning wanted.
A kind of utility model patent " special gamma-rays inspection of the pipeline of close-range protection of Patent No. 201020679325.4
Survey device ", it discloses the detection device and includes source machine, gamma ray projector, patch device and lead rubber, wherein source machine includes gamma-rays
Source storeroom, locking device, gamma ray projector channel, pull rod, internal exposure window composition, gamma ray projector are mounted on pull rod；Lock
Pull rod can be locked by tight device in different location；Patch device is that shape is one section of arc-shaped stainless steel casing, interior
Rolled lead is served as a contrast, centre is provided with the rectangular window for being capable of activity；Lead rubber is used for being wrapped in the outside of pipeline and source machine, prevents from penetrating
The leakage of line.The film for needing to expose can be placed during use on the outside of patch device, the outside of film, which can wrap up, places ray leakage
Lead rubber.Although above-mentioned patent has except 3~5 meters of ranges, the dose of radiation of public reception is below GBZ132-2008 rule
The effect of fixed (2.5uSv/h), but the smaller that cannot control safe range still can have certain work certain
It is inconvenient.
Invention content
In view of the deficiencies of the prior art, the purpose of the present invention, which is intended to provide, a kind of can effectively reduce radiation scope, safety
Performance higher uses more convenient gamma-ray testing apparatus.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of gamma-ray testing apparatus, including gamma-ray detection apparatus, defeated source capsule, focus adjustment pipe, orientation photohead and
Stereotype shielding ring；One end of the defeated source capsule is connected with gamma-ray detection apparatus, and the other end of the defeated source capsule passes through focus adjustment
Pipe is connected with orientation photohead；The focus adjustment pipe is screwed onto on stereotype shielding ring, and the orientation photohead is located at stereotype
The inside of shielding ring is in order to irradiating the position to be detected a flaw of pipe under test；The stereotype shielding ring is fixedly attached to outside pipe under test
Portion, between the stereotype shielding ring and pipe under test be equipped with for be wrapped in pipe under test position both sides to be detected a flaw the first lead
Rubber；The second lead rubber is enclosed on the outside of the defeated source capsule and on the outside of focus adjustment pipe.
Preferably, the semicircle shielding ring that the stereotype shielding ring is bolted to connection together by two forms,
The end of each semicircle shielding ring is equipped with connecting plate, and the bolt hole for covering connecting bolt is equipped on each connecting plate.
Preferably, the quantity of the connecting plate of the end of each semicircle shielding ring is four.
Preferably, the focus adjustment pipe is screwed onto the center position in the outside of semicircle shielding ring.
Preferably, the outer sheath of the stereotype shielding ring is equipped with the locking steel for strengthening two semicircle shielding ring connections
Circle.
Preferably, the quantity of the locking steel ring is 2~3.
Preferably, the stereotype shielding ring includes skeleton and stereotype, and the skeleton is equipped with reinforcing rib, and the stereotype leads to
Cross outside and the left and right sides that steel bar is fixed on skeleton.
Preferably, the skeleton is equal leg angle skeleton；The thickness of the stereotype is 6mm.
Preferably, the width of the stereotype shielding ring is 150~200mm, thickness 200mm.
Preferably, the width of the first lead rubber is 50mm, and thickness is 3~5mm.
Beneficial effects of the present invention are as follows：
The gamma-ray testing apparatus can effectively reduce radiation scope, security performance higher, and use more convenient.Its energy
Enough so that the radiation in entire detection process is in masked state, it more may be such that the radiation level except 2m ranges is substantially at
Safe range.Avoiding problems the interference worked normally to production unit, adapt to the special need of petrochemical plant rush repair
Will, evening operation is needed not wait for, does not need to withdraw field personnel, there are apparent economic and social benefits.
The device of the invention is applicable to diameter less than 800mm, scanning thickness less than the carbon steel of 100mm, steel alloy, stainless
Butt weld radiographic inspection on steel and the boilers and pressure vessel pressure pipeline and special equipment of other materials.At the construction field (site)
It can be worked at the same time with other staff, not needing to clear out a gathering place carries out ray detection, can be with flexible arrangement construction time, especially engineering
The occasions such as the work surfaces such as later stage, repair maintenance, old device non-stop production reformation are small, the duration is tight.In high-altitude during detection operation, it can keep away
Test free personnel cover ray repeatedly between high-altitude and ground up and down to hide, and can be detected on daytime, save
Manpower ensure that safety.In petrochemical industry production, maintenance situation of stopping in emergency often occurs.The use of the device can both make
Maintenance orderly carries out ensuring that detection job schedule.
Description of the drawings
Fig. 1 is the structure chart of the better embodiment of gamma-ray testing apparatus of the present invention.
Fig. 2 is the sectional view of stereotype shielding ring in gamma-ray testing apparatus of the present invention.
Fig. 3 is the structure chart on the outside of stereotype shielding ring in gamma-ray testing apparatus of the present invention.
Reference numeral：1st, gamma-ray detection apparatus；2nd, defeated source capsule；3rd, focus adjustment pipe；4th, photohead is oriented；5th, stereotype shields
Circle；51st, bolt；52nd, connecting plate；53rd, skeleton；54th, stereotype；55th, reinforcing rib；56th, steel bar；6th, pipe under test；71st, the first lead rubber
Glue；72nd, the second lead rubber；8th, steel ring is locked.
Specific embodiment
Below in conjunction with attached drawing and specific embodiment, the present invention is described further：
Fig. 1, Fig. 2 and Fig. 3 are referred to, the present invention relates to a kind of gamma-ray testing apparatus, better embodiment includes
Gamma-ray detection apparatus 1, defeated source capsule 2, focus adjustment pipe 3, orientation photohead 4 and stereotype shielding ring 5；One end of defeated source capsule 2 with
Gamma-ray detection apparatus 1 is connected, and the other end of defeated source capsule 2 is connected by focus adjustment pipe 3 with orientation photohead 4；Focus adjustment
Pipe 3 is screwed onto on stereotype shielding ring 5, and orientation photohead 4 is located at the inside of stereotype shielding ring 5 in order to irradiate pipe under test 6
Position to be detected a flaw；Stereotype shielding ring 5 is fixedly attached to outside pipe under test 6, is equipped between stereotype shielding ring 5 and pipe under test 6
For being wrapped in the first lead rubber 71 of the position both sides to be detected a flaw of pipe under test 6；Defeated 2 outside of source capsule and focus adjustment pipe 3
Outside is enclosed with the second lead rubber 72.By focusing regulation pipe 3, the transillumination focal length of radioactive source can be adjusted.Gamma-rays
Radioactive source can be transported to orientation photohead by defeated source capsule 2 and carry out transillumination exposure by defectoscope.
The device can cause radioactive source to pass sequentially through defeated source capsule 2, focus adjustment pipe 3 and orientation photohead 4 and reach and expose
Luminous point is oriented sensitivity of film, is radiated so that ray is named according to certain radiation towards specific direction, and other directions
Ray then may be oriented photohead 4 and shield, and exposure point here is position to be detected a flaw.It completes to withdraw radioactive source after exposure
Into gamma-ray detection apparatus 1, in entire detection process gamma-rays generate radiation be in masked state, except 2m ranges its
Radiation level is substantially at safe range.The device adapts to the special requirement of petrochemical plant rush repair, needs not wait for
Evening operation does not need to withdraw field personnel, relative to common gamma-rays operation radiation protection radius in more than 30m,
Radiation protection range has been greatly shortened, has avoided the interference worked normally to production unit, there is apparent economic society effect
Benefit.
Wherein, stereotype shielding ring 5 is made up of by two the semicircle shielding ring that bolt 51 is fixed together, each
The end of semicircle shielding ring is equipped with connecting plate 52, and the bolt hole for covering connecting bolt 51 is equipped on each connecting plate.When
So, the two semicircle shielding rings can also be by remaining mode fixed Combination together.The end of each semicircle shielding ring
Portion can be fixedly linked by welding with connecting plate.Preferably, the quantity of the connecting plate 52 of the end of each semicircle shielding ring
It it is four, certainly, the quantity of connecting plate 52 may be one or more.Focus adjustment pipe 3 is screwed onto semicircle shielding
The center position in the outside of circle.Focus adjustment pipe 3 can adjust radioactive source transillumination focal length.
Preferably, the outer sheath of stereotype shielding ring 5 is equipped with the locking steel ring for strengthening two semicircle shielding ring connections
8.The locking steel ring 8 can cause lead shielding to cover circle 5 and be more socketed in 6 outside of pipe under test securely.According to specific needs, it locks
The quantity of tight steel ring 8 can be one or more, it is preferred that the quantity of locking steel ring 8 is 2~3.
Stereotype shielding ring 5 includes skeleton 53 and stereotype 54, and skeleton 53 is equipped with reinforcing rib 55, and stereotype 54 passes through steel bar 55
It is fixed on the outside and the left and right sides of skeleton 53.Skeleton 53 is equal leg angle skeleton；The thickness of stereotype 54 is 6mm.It is wherein burnt
It can be screwed onto on skeleton 53 away from regulation pipe 3.Skeleton 53 can also be that other suitable just materials are process, while reinforcing rib
55 may be steel bar.Preferably, the thickness of stereotype 54 can be 6mm.
The width AB of stereotype shielding ring 5 can be 150~200mm, naturally it is also possible to be that other are suitably sized.Lead shielding
The thickness A C for covering circle 5 can be 200mm or the size of other matters.The internal diameter of stereotype shielding ring 5 can be set to and treat test tube
The outer diameter in road 6 is adapted.Preferably, the width of the first lead rubber 71 can be 50mm, and thickness can be 3~5mm.First lead rubber
The position both sides to be detected a flaw that glue 71 is wrapped in pipe under test 6 can play sealing function, be leaked out so as to be effectively prevented from gamma-rays.
The second lead rubber 72 is wrapped in the outside of defeated source capsule 2 and focus adjustment pipe 3 simultaneously, and thickness may be 3~5mm, can
The gamma-rays during radioactive source folding and unfolding is effectively prevent to leak out.The length of wherein defeated source capsule 2 is unsuitable long, to be advisable in 2m.
Specifically, the specific work process of the device is as follows：
It is possible, firstly, to select suitable stereotype shielding ring according to the size of pipe under test, and wait to detect a flaw in pipe under test
Position both sides tight the first lead rubber, then the location arrangements transillumination film to be detected a flaw in pipeline to be detected.Then connection is fixed
To photohead and focus adjustment pipe, the position of regulation pipe is focused according to the size of transillumination focal length.Then, in pipe under test
Stereotype shielding ring is installed in outside, and the position to be detected a flaw of orientation photohead alignment pipe under test can be arranged as required to orientation and expose
Shaven head deviates the distance at detected part center, compresses the first lead rubber and tightens the bolt on stereotype shielding ring, while tighten lock
Tight steel ring, and defeated source capsule and focus adjustment pipe are wrapped up with the second lead rubber, defeated source capsule is connected with focus adjustment pipe.Finally set
Radioactive source is transported to orientation photohead from gamma-ray detection apparatus and is exposed, while can also use by security protection distance 2m
Dose of radiation detecting instrument detects environmental radiation dose.When exposure finishes, radioactive source is recovered to gamma-ray detection apparatus.Certainly,
It can repeat the above process, to detect other detection positions of pipe under test.
For those skilled in the art, technical solution that can be as described above and design are made other each
Kind is corresponding to be changed and deforms, and all these change and deform the protection model that should all belong to the claims in the present invention
Within enclosing.
Claims (9)
1. a kind of gamma-ray testing apparatus, it is characterised in that：It is exposed including gamma-ray detection apparatus, defeated source capsule, focus adjustment pipe, orientation
Shaven head and stereotype shielding ring；One end of the defeated source capsule is connected with gamma-ray detection apparatus, and the other end of the defeated source capsule passes through
Focus adjustment pipe is connected with orientation photohead；The focus adjustment pipe is screwed onto on stereotype shielding ring, the orientation photohead
Positioned at the inside of stereotype shielding ring in order to irradiating the position to be detected a flaw of pipe under test；The stereotype shielding ring, which is fixedly attached to, to be treated
Pipeline external is surveyed, the position both sides to be detected a flaw for being wrapped in pipe under test are equipped between the stereotype shielding ring and pipe under test
The first lead rubber；The second lead rubber is enclosed on the outside of the defeated source capsule and on the outside of focus adjustment pipe；The stereotype shielding
Circle includes skeleton and stereotype, the skeleton equipped with reinforcing rib, the stereotype by steel bar be fixed on skeleton outside and
The left and right sides.
2. gamma-ray testing apparatus as described in claim 1, it is characterised in that：The stereotype shielding ring passes through bolt by two
The semicircle shielding ring composition being fixed together, the end of each semicircle shielding ring is equipped with connecting plate, each to connect
The bolt hole for covering connecting bolt is equipped on plate.
3. gamma-ray testing apparatus as claimed in claim 2, it is characterised in that：The connection of the end of each semicircle shielding ring
The quantity of plate is four.
4. gamma-ray testing apparatus as claimed in claim 2, it is characterised in that：The focus adjustment pipe is screwed onto semicircle screen
Cover the center position in the outside of circle.
5. the gamma-ray testing apparatus as described in any one of claim 2 to 4, it is characterised in that：The stereotype shielding ring
Outer sheath is equipped with the locking steel ring for strengthening two semicircle shielding ring connections.
6. gamma-ray testing apparatus as claimed in claim 5, it is characterised in that：The quantity of the locking steel ring is 2~3.
7. gamma-ray testing apparatus as described in claim 1, it is characterised in that：The skeleton is equal leg angle skeleton；It is described
The thickness of stereotype is 6mm.
8. gamma-ray testing apparatus as described in claim 1, it is characterised in that：The width of the stereotype shielding ring for 150~
200mm, thickness 200mm.
9. gamma-ray testing apparatus as described in claim 1, it is characterised in that：The width of the first lead rubber is 50mm,
Thickness is 3~5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510244520.1A CN104833683B (en) | 2015-05-13 | 2015-05-13 | A kind of gamma-ray testing apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510244520.1A CN104833683B (en) | 2015-05-13 | 2015-05-13 | A kind of gamma-ray testing apparatus |
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| Publication Number | Publication Date |
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| CN104833683A CN104833683A (en) | 2015-08-12 |
| CN104833683B true CN104833683B (en) | 2018-07-10 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108318913B (en) * | 2018-01-04 | 2021-06-25 | 中国核电工程有限公司 | Shielding device for directionally measuring complex dose field of nuclear power plant |
| CN110987974A (en) * | 2019-12-17 | 2020-04-10 | 袁国玉 | Multi-caliber pipeline weld joint radiation-proof flaw detection device |
| CN112489837B (en) * | 2020-11-27 | 2024-04-02 | 中广核检测技术有限公司 | Sheet distributing device and method for in-service inspection of claw gaskets of control rod driving mechanism |
| CN112748040B (en) * | 2020-12-24 | 2023-11-10 | 郑州工程技术学院 | Slurry pipeline conveying density change detection meter and detection method |
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| JP3487750B2 (en) * | 1998-01-12 | 2004-01-19 | 出光エンジニアリング株式会社 | Method and apparatus for measuring thickness of deposits on inner wall of pipe |
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| CN2280903Y (en) * | 1996-09-17 | 1998-05-06 | 徐立维 | External irradiating gamma source quick positioning clamping device for pipeline flaw detection method |
| CN2322143Y (en) * | 1998-02-23 | 1999-06-02 | 上海宝冶压力容器安全检验技术研究所 | Pipe 'gamma' ray fault detector with negative fixing holder |
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