CN104198502A - Gamma ray meter-scale flaw detection device - Google Patents
Gamma ray meter-scale flaw detection device Download PDFInfo
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- CN104198502A CN104198502A CN201310241219.6A CN201310241219A CN104198502A CN 104198502 A CN104198502 A CN 104198502A CN 201310241219 A CN201310241219 A CN 201310241219A CN 104198502 A CN104198502 A CN 104198502A
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Abstract
The invention discloses a gamma ray meter-scale flaw detection device. The device comprises a gamma ray source (110) and a directional radiation shield (130). The directional radiation shield (130) is connected to an output end of the gamma ray source (110). The directional radiation shield (130) is provided with a directional radiation window (134) used for limiting the transillumination range (140) of rays. The gamma ray meter-scale flaw detection device comprises the gamma ray source and the directional radiation shield, and the radiation range of the scattered rays can be furthest controlled, so that the safe working distance is allowed to be in a relatively short range such as a range ranging from 1 m to 5 m, and the trouble caused by the fact that the safe working distance of conventional ray flaw detection devices is excessively large is avoided.
Description
Technical field
The present invention relates to a kind of X-ray detection apparatus X, relate in particular to the gamma ray meter level failure detector of marine oil industry and petroleum chemical industry.
Background technology
As everyone knows, radiographic inspection is to utilize ray to penetrate the method for detection that object is found object inherent vice.Radial energy makes light reaching the film or excites some material to send fluorescence.Ray is decay according to certain rules in penetrating object process, utilizes the relation of attenuation degree and ray sensitization or fluorescence excitation can check the defect of interior of articles.Radiographic inspection is divided into x-ray inspection, gamma-rays (gamma ray) flaw detection, high-energy ray flaw detection and neutron ray flaw detection etc.Ray is harmful to human body.During flaw detection operation, relevant safety regulation for operations should be observed, necessary safeguard procedures should be taked.
Along with developing rapidly of China's economic, the demand of the energy, petrochemicals is increasing, and the engineering of marine oil and the maintenance schedule requirement that at sea stops production are shorter and shorter, and construction quality requires more and more higher.Wherein, in these industries, the detection of thin walled welds quality mainly be take ray detection as main.
While working at the scene due to gamma-rays and x-ray, there is very strong ionising radiation, during radiographic inspection, require to delimit very large safe distance, to avoid correlation Workers or non-ray staff to cause actual bodily harm.Like this, when detecting a flaw, other all staff will withdraw, and project progress is caused to very large impact.During facility ray operation especially at sea, due to limited space, radiographic inspection has larger impact to marine personnel healthy and safe.Particularly, conventional radiographic inspection requires to have the safety work distance of 50 meters at least, and in the narrow and small region of the operations such as offshore platform or living space, safe distance is difficult to guarantee; And conventional radiographic inspection requires the other staff of operation simultaneously, as welder, electrician etc. will withdraw safety zone, larger on other operation impact.Therefore, the work safety of conventional X-ray detection apparatus X distance is excessive, be difficult to guarantee, and larger on other operation impacts.
Summary of the invention
The object of the invention is to, a kind of gamma ray meter level failure detector is provided, its work safety distance is little.
The present invention is achieved through the following technical solutions: a kind of gamma ray meter level failure detector, wherein, described gamma ray meter level failure detector comprises gamma-ray source, circumferential radiation cover, described circumferential radiation cover is connected with the output terminal of described gamma-ray source, and described circumferential radiation cover has the circumferential radiation district that limits sensitivity of film scope.
As the further improvement of technique scheme, between described circumferential radiation cover and described gamma-ray source, be provided with radiographic source passage, described circumferential radiation cover is connected with the output terminal of described gamma-ray source through described radiographic source passage.
As the further improvement of technique scheme, described gamma-ray source, described radiographic source passage, described circumferential radiation cover connect by thread seal in turn.
As the further improvement of technique scheme, described radiographic source passage has the radiation protection body of radiographic source passage pipeline and parcel radiographic source passage pipeline.
As the further improvement of technique scheme, described radiographic source passage is provided with handle, and described handle is fixed on the radiation protection body of described radiographic source passage.
Further improvement as technique scheme, described circumferential radiation cover comprises the first radiation shield, connecting link, the second radiation shield, described connecting link is connected between described the first radiation shield and described the second radiation shield, and described circumferential radiation district is formed between described the first radiation shield and described the second radiation shield.
As the further improvement of technique scheme, the width in described circumferential radiation district is radially more and more wider along circumferential radiation cover.
Further improvement as technique scheme, described the first radiation shield has first end face relative with described the second radiation shield, described the second radiation shield has second end face relative with described the first radiation shield, and the first end face of described the first radiation shield and the second end face of described the second radiation shield parallel.
As the further improvement of technique scheme, described connecting link is threaded connection between described the first radiation shield and described the second radiation shield.
As the further improvement of technique scheme, described the first radiation shield and described the second radiation shield all have depleted nuclear fuel protection body.
The invention has the beneficial effects as follows: gamma ray meter level failure detector of the present invention comprises gamma-ray source, circumferential radiation cover, described circumferential radiation cover is connected with the output terminal of described gamma-ray source, described circumferential radiation cover has the circumferential radiation district that limits sensitivity of film scope, thus, can control to greatest extent scattered ray radiation scope, make work safety distance for example, in relatively short distance range (1 meter to 5 meters), avoid the excessive puzzlement of work safety distance of conventional X-ray detection apparatus X.
Accompanying drawing explanation
Fig. 1 is the structural representation of gamma ray meter level failure detector according to an embodiment of the invention.
Fig. 2 is the structural representation of circumferential radiation cover of the gamma ray meter level failure detector of Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further detailed.
According to an aspect of the present invention, the excessive puzzlement of work safety distance for conventional X-ray detection apparatus X, adopt the circumferential radiation cover of controlling to greatest extent scattered ray radiation scope of innovative design, make scattered ray radiation be all in the interior circumferentially scattering of scope of certain length, work safety distance for example, in relatively short distance range (1 meter to 5 meters), and the personal security radiation dose of the operation that can be up to state standards.
As shown in Figure 1, the gamma ray of the present embodiment (gamma-rays) meter level failure detector 100 comprises gamma-ray source 110, circumferential radiation cover 130.Described circumferential radiation cover 130 is connected with the output terminal of described gamma-ray source 110.Described circumferential radiation cover 130 has the circumferential radiation district 134 that limits sensitivity of film scope.
Wherein, gamma-ray source 110 preferably adopts the lower gamma ray projector-Se75 of relative emittance.Se75 gamma ray projector and conventional Ir192 and Co60 comparison, the emittance of Se75 is low, and security performance is good, is easy to protection.And, preferably select the gamma ray projector of low-activity, make security performance and barrier propterty all good.
In the present embodiment, between described circumferential radiation cover 130 and described gamma-ray source 110, be provided with radiographic source passage 120.In Fig. 1, the structures such as the length of radiographic source passage 120 and shape only, for for example, can adopt the delivery line of other structures.Described circumferential radiation cover 130 is connected with the output terminal of described gamma-ray source 110 through described radiographic source passage 120.And described gamma-ray source 110, described radiographic source passage 120, described circumferential radiation cover 130 in turn (along circumferential radiation cover length direction X) connect by thread seal.
Particularly, the output terminal of gamma-ray source 110 is provided with internal thread 114, the two ends of described radiographic source passage 120 are respectively equipped with the first external thread 124, the second external thread 128, circumferential radiation cover 130 is provided with internal thread 138, internal thread 114 coordinates with the first external thread 124, and internal thread 138 coordinates with the second external thread 128.Thus, when depositing at ordinary times, can be by thering is externally threaded tin hat protection gamma-ray source 110.On the other hand, by the degree of tightness of each screw thread, 360 ° of direction in circumferential radiation district 134 that can realize circumferential radiation cover are adjustable, so that adapt to various flaw detections position.
As shown in Figure 1, described radiographic source passage 120 has the radiation protection body 122 of radiographic source passage pipeline 126 and parcel radiographic source passage pipeline 126.Described radiation protection body 122 is preferably depleted nuclear fuel protection body.And described radiographic source passage 120 is provided with handle 121.Described handle 121 is fixed on the radiation protection body 122 of described radiographic source passage 120.Thus, when mobile carrying, can by handle 121, carry out handling easily and transport.
As depicted in figs. 1 and 2, described circumferential radiation cover 130 comprises the first radiation shield 131, connecting link 135, the second radiation shield 132.Described connecting link 135 is connected between described the first radiation shield 131 and described the second radiation shield 132.Described circumferential radiation district 134 is formed between described the first radiation shield 131 and described the second radiation shield 132.Described the first radiation shield 131 all has depleted nuclear fuel protection body with described the second radiation shield 132.Wherein, the first radiation shield 131 has radiation shield passage pipeline 136, radiation shield passage pipeline 136 be located at the pipeline connection on connecting link 135.And connecting link 135 is provided with in a plurality of endpiece 139(figure and only illustrates one).
In the present embodiment, the width in described circumferential radiation district 134 is radially more and more wider along circumferential radiation cover 130.The width in described circumferential radiation district 134 i.e. width on circumferential radiation cover length direction X.Circumferential radiation district 134 is for allowing the space of radiation.
In the present embodiment, described the first radiation shield 131 has first end face 1330 relative with described the second radiation shield 132, and described the second radiation shield 132 has second end face 1370 relative with described the first radiation shield 131.And the first end face 1330 of described the first radiation shield 131 is parallel with the second end face 1370 of described the second radiation shield 132.By the centre of the first radiation shield 131 and the second radiation shield 132 (the first radiation shield 131 and the second relative, identical with connecting link 135 diameters position of radiation shield 132) is processed into parallel plane, so that when radiographic source breaks down, can be promptly by the first radiation shield 131 and the second radiation shield 132 closures, to avoid and to stop the radiation of ray.
As depicted in figs. 1 and 2, the radial outside end face of the first end face 1330 of the first radiation shield 131 is inclined ramp, the radial outside end face of the second end face 1370 of the second radiation shield 132 is inclined ramp, and thus, the width that forms circumferential radiation district 134 becomes large shape gradually.In this example, in the enlarged configuration gradually in the circumferential radiation district 134 forming between the first radiation shield 131 and the second radiation shield 132, the scope of angle a between the radial outside end face of the radial outside end face of the first end face 1330 of the first radiation shield 131 and the second end face 1370 of the second radiation shield 132, at 10 ° to 40 °, is preferably 10 °.Certainly, also can, according to concrete performance, structure and this angle a in circumferential radiation district 134 be set.
As shown in Figure 2, described connecting link 135 is threaded connection between described the first radiation shield 131 and described the second radiation shield 132.The two ends of described connecting link 135 are respectively equipped with external thread, the end of the first radiation shield 131 is provided with internal thread 133, the end of described the second radiation shield 132 is provided with internal thread 137, thus, the two ends of connecting link 135 are threaded in respectively between described the first radiation shield 131 and described the second radiation shield 132.So, the opening size in the circumferential radiation district 134 between the first radiation shield 131 and the second radiation shield 132 (width on circumferential radiation cover length direction X), can regulate (zooming in or out) by being positioned at the screw thread of the connecting link 135 at center.The connecting link 135 of circumferential radiation cover adopts the uniform thin-wall stainless steel of material to make.The opening size in circumferential radiation district should be as far as possible little in the situation that meeting transillumination and requiring, and like this, can avoid to greatest extent the generation of scattered ray.
Gamma ray meter level failure detector 100 of the present invention goes for the body diameter that pipeline diameter is greater than gamma ray meter level failure detector 100, and throat depth is less than the girth joint center exposure method of 35mm.In the radiographic inspection method of pipeline girth joint, center circumferential exposure method is most effective, and effect is best, and therefore the method for (transversal crack recall rate is the highest) the best in quality, in situation with good conditionsi, should preferentially select circumferential exposure method to pipeline girth joint.
During use, first, according to the width of detected weld and examination requirements, the width in suitable circumferential radiation district is set, adopts suitable method to place and be fixed to the center of tested pipeline gamma ray meter level failure detector.Then, in the outside of tested pipeline, radiographic film is fixed.Then, in the scope of a meter to several meters wide after film, all adopt soft lead plate, plumbous rubber or other equal protective materialss to wrap up completely, prevent the radiation of ray.In addition, in testing process, preferably adopt through the dosimeter of calibration Area Of Safe Operation is measured and set up in on-the-spot safety zone, on Area Of Safe Operation border, isolation and warning sign are set, and have special personnel to guard, be responsible for detecting radiation dose, and prevent that other staff from swarming into Area Of Safe Operation.Setting up of Area Of Safe Operation, according to the dosage requirement in < < GB-Z-132-2002 industry gamma ray inspection public health standard > >, measurement result is less than one meter for public security distance.In real work, in order to increase safety coefficient, also can be set to three meters or other distance by Area Of Safe Operation.
Above embodiment has been described in detail the present invention, but these are not construed as limiting the invention.Protection scope of the present invention is not limited with above-mentioned embodiment, as long as the equivalence that those of ordinary skills do according to disclosed content is modified or changed, all should include in the protection domain of recording in claims.
Claims (10)
1. a gamma ray meter level failure detector, it is characterized in that, described gamma ray meter level failure detector comprises gamma-ray source (110), circumferential radiation cover (130), described circumferential radiation cover (130) is connected with the output terminal of described gamma-ray source (110), and described circumferential radiation cover (130) has the circumferential radiation district (134) that limits sensitivity of film scope.
2. gamma ray meter level failure detector according to claim 1, it is characterized in that, between described circumferential radiation cover (130) and described gamma-ray source (110), be provided with radiographic source passage (120), described circumferential radiation cover (130) is connected with the output terminal of described gamma-ray source (110) through described radiographic source passage (120).
3. gamma ray meter level failure detector according to claim 2, is characterized in that, described gamma-ray source (110), described radiographic source passage (120), described circumferential radiation cover (130) connect by thread seal in turn.
4. gamma ray meter level failure detector according to claim 2, is characterized in that, described radiographic source passage (120) has the radiation protection body (122) of radiographic source passage pipeline (126) and parcel radiographic source passage pipeline (126).
5. gamma ray meter level failure detector according to claim 4, is characterized in that, described radiographic source passage (120) is provided with handle (121), and described handle (121) is fixed on the radiation protection body (122) of described radiographic source passage (120).
6. gamma ray meter level failure detector according to claim 1, it is characterized in that, described circumferential radiation cover (130) comprises the first radiation shield (131), connecting link (135), the second radiation shield (132), described connecting link (135) is connected between described the first radiation shield (131) and described the second radiation shield (132), and described circumferential radiation district (134) is formed between described the first radiation shield (131) and described the second radiation shield (132).
7. gamma ray meter level failure detector according to claim 6, is characterized in that, the width in described circumferential radiation district (134) is radially more and more wider along circumferential radiation cover (130).
8. gamma ray meter level failure detector according to claim 6, it is characterized in that, described the first radiation shield (131) has first end face (1330) relative with described the second radiation shield (132), described the second radiation shield (132) has second end face (1370) relative with described the first radiation shield (131), and first end face (1330) of described the first radiation shield (131) and second end face (1370) of described the second radiation shield (132) parallel.
9. gamma ray meter level failure detector according to claim 6, is characterized in that, described connecting link (135) is threaded connection between described the first radiation shield (131) and described the second radiation shield (132).
10. gamma ray meter level failure detector according to claim 6, is characterized in that, described the first radiation shield (131) all has depleted nuclear fuel protection body with described the second radiation shield (132).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310241219.6A CN104198502A (en) | 2013-06-18 | 2013-06-18 | Gamma ray meter-scale flaw detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310241219.6A CN104198502A (en) | 2013-06-18 | 2013-06-18 | Gamma ray meter-scale flaw detection device |
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| CN104198502A true CN104198502A (en) | 2014-12-10 |
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| CN201310241219.6A Pending CN104198502A (en) | 2013-06-18 | 2013-06-18 | Gamma ray meter-scale flaw detection device |
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Citations (9)
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| CN2425361Y (en) * | 2000-04-21 | 2001-03-28 | 国家电力公司电力建设研究所海门探伤设备联营厂 | Gamma ray flaw detector |
| CN1593344A (en) * | 2003-09-09 | 2005-03-16 | Ge医疗系统环球技术有限公司 | Radiation tomography apparatus |
| JP2007020604A (en) * | 2005-07-12 | 2007-02-01 | Ge Medical Systems Global Technology Co Llc | X-ray equipment and scan condition setting device |
| CN2918968Y (en) * | 2006-06-06 | 2007-07-04 | 抚顺市迅达检测设备有限公司 | Conduit gamma-ray detecting special protecting device |
| US20070268996A1 (en) * | 2006-05-08 | 2007-11-22 | Akira Hagiwara | Radiation imaging apparatus and radiation imaging method |
| CN101769881A (en) * | 2010-01-19 | 2010-07-07 | 华南理工大学 | Gamma-ray source-based ray nondestructive testing device for foreign body inside small-diameter metal tube |
| JP2013019698A (en) * | 2011-07-07 | 2013-01-31 | Toshiba Corp | Photon count type image detector, x-ray diagnostic device, and x-ray computer tomographic device |
| US20130070897A1 (en) * | 2010-05-28 | 2013-03-21 | Snecma | Method of non-destructive inspection and a device for implementing the method |
| CN203299147U (en) * | 2013-06-18 | 2013-11-20 | 深圳市锋瑞佳实业发展有限公司 | Gamma ray meter-scale flaw detection device |
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2013
- 2013-06-18 CN CN201310241219.6A patent/CN104198502A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2425361Y (en) * | 2000-04-21 | 2001-03-28 | 国家电力公司电力建设研究所海门探伤设备联营厂 | Gamma ray flaw detector |
| CN1593344A (en) * | 2003-09-09 | 2005-03-16 | Ge医疗系统环球技术有限公司 | Radiation tomography apparatus |
| JP2007020604A (en) * | 2005-07-12 | 2007-02-01 | Ge Medical Systems Global Technology Co Llc | X-ray equipment and scan condition setting device |
| US20070268996A1 (en) * | 2006-05-08 | 2007-11-22 | Akira Hagiwara | Radiation imaging apparatus and radiation imaging method |
| CN2918968Y (en) * | 2006-06-06 | 2007-07-04 | 抚顺市迅达检测设备有限公司 | Conduit gamma-ray detecting special protecting device |
| CN101769881A (en) * | 2010-01-19 | 2010-07-07 | 华南理工大学 | Gamma-ray source-based ray nondestructive testing device for foreign body inside small-diameter metal tube |
| US20130070897A1 (en) * | 2010-05-28 | 2013-03-21 | Snecma | Method of non-destructive inspection and a device for implementing the method |
| JP2013019698A (en) * | 2011-07-07 | 2013-01-31 | Toshiba Corp | Photon count type image detector, x-ray diagnostic device, and x-ray computer tomographic device |
| CN203299147U (en) * | 2013-06-18 | 2013-11-20 | 深圳市锋瑞佳实业发展有限公司 | Gamma ray meter-scale flaw detection device |
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