CN214752967U - Device for positioning and shielding gamma ray source - Google Patents
Device for positioning and shielding gamma ray source Download PDFInfo
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- CN214752967U CN214752967U CN202023273017.4U CN202023273017U CN214752967U CN 214752967 U CN214752967 U CN 214752967U CN 202023273017 U CN202023273017 U CN 202023273017U CN 214752967 U CN214752967 U CN 214752967U
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- guide shaft
- fixing plate
- collimator
- sliding block
- telescopic rod
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The utility model relates to a nuclear power equipment field especially relates to a device that is used for gamma ray source location and shielding. The apparatus, comprising: a pipe clamping unit; one end of the telescopic rod is connected with the pipeline clamping unit, and the other end of the telescopic rod is connected with the first fixing plate; the first fixing plate is connected to the lower part of the first guide shaft; the back of the main positioning plate is fixedly connected with an axial positioning block, and the front of the main positioning plate is provided with a second guide shaft; the axial positioning block is sleeved on the first guide shaft and slides or is fixed along the first guide shaft; the sliding block is connected with the second guide shaft in a sliding manner, and the top of the sliding block is movably connected with a collimator; and the bottom of the collimator is provided with a threaded through hole, and the exposure direction is adjusted by rotating around the axis. The utility model discloses but accurate positioning or shielding ray source promote ray inspection efficiency, guarantee the once shooting qualification rate of tubule footpath pipeline welding seam, reduce isolation area's scope under the prerequisite that satisfies the radiation protection requirement.
Description
Technical Field
The utility model relates to a nuclear power equipment field especially relates to a device that is used for gamma ray source location and shielding.
Background
When the pipe with the diameter less than 89mm is in butt joint with a welded joint and a plug bush welded joint, a double-wall double-shadow transillumination technology is generally adopted. The double-wall double-shadow transillumination comprises a vertical transillumination method and an elliptical transillumination method, and during the radiographic inspection of the welding line, the transillumination is required to be performed at least twice in the directions of 90 degrees, and a radioactive source and a film are respectively arranged on two sides of the central plane of the detected welding line so as to improve the detection rate of defects.
When the ratio phi/e is less than or equal to 10, a vertical transillumination method is adopted; when the ratio phi/e is more than 10, adopting a vertical transillumination method or an elliptical transillumination method; phi is the outside diameter of the tube and e is the thickness of the tube wall.
When the double-wall double-image method is used for radiographic inspection of pipelines, the pipeline arrangement is complicated, the operation space and the observation range of personnel are very limited, the radiation source positioning is often fixed on a source pipe by using an adhesive tape or an elastic rope, the accurate positioning of a radiation source and the installation of the source pipe are difficult to ensure, the phenomenon of film image distortion is serious, defects are difficult to identify, the ideal film quality can be obtained by repeated tests, the working efficiency is low, if the nuclear island plant works, the radiation dose rate is high, the workers can increase and receive unnecessary doses, meanwhile, when radiographic inspection work is carried out, a large-area isolation area needs to be divided for preventing the workers from mistakenly irradiating, a warning mark is set and the workers are attended at a key position, a large amount of manpower and material resources are consumed.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the utility model provides a device for gamma ray source location and shielding can pinpoint or shield the ray source, promotes ray inspection efficiency, guarantees the once shooting qualification rate of small pipe diameter pipeline welding seam, reduces the scope of isolation region under the prerequisite that satisfies the radiation protection requirement.
The utility model provides a device for gamma ray source location and shielding, include: the device comprises a pipeline clamping unit, a telescopic rod, a first fixing plate, a first guide shaft, a main positioning plate, an axial positioning block, a second guide shaft, a sliding block and a collimator;
one end of the telescopic rod is connected with the pipeline clamping unit, and the other end of the telescopic rod is connected with the first fixing plate;
the first fixing plate is connected to the lower part of the first guide shaft;
the back of the main positioning plate is fixedly connected with an axial positioning block, and the front of the main positioning plate is provided with a second guide shaft;
the axial positioning block is sleeved on the first guide shaft and slides or is fixed along the first guide shaft;
the sliding block is connected with the second guide shaft in a sliding mode, and the top of the sliding block is movably connected with a collimator;
the bottom of the collimator is provided with a threaded through hole, and the exposure direction is adjusted by rotating around an axis.
Preferably, the main fixing plate is further provided with a belt and a stepping motor, the stepping motor is arranged on one side of the belt and drives the belt to move, and the sliding block moves along the second guide shaft.
Preferably, the stepping motor is disposed on a back surface of the main fixing plate.
Preferably, the collimator is in threaded connection with the slider and inserted into a hole in the top of the slider.
Preferably, the collimator is slotted in the middle.
Preferably, the pipe clamping unit is composed of two aligned hollow semi-cylindrical clamping grooves, one of which is threaded.
Preferably, a rubber ring is arranged in the hollow semi-cylindrical clamping groove.
Preferably, the telescopic rod comprises a long rod and a short rod, one end of the long rod is fixedly connected to the first fixing plate, and one end of the short rod is fixedly connected to the hollow semi-cylindrical clamping groove;
the long rod and the short rod are in clearance fit and are positioned and fastened through fastening screws.
Preferably, a second fixing plate is further arranged at the top of the first guide shaft;
the first fixing plate and the second fixing plate are fixed in a mode that bolts and nuts are matched to apply pretightening force.
Preferably, the first guide shaft comprises 2-4 guide shafts.
Compared with the prior art, the utility model discloses a device for gamma ray source location and shielding, through the pipeline clamping unit with whole device fixed on the pipeline, realize the focus adjustment in the radiation source pipeline vertical direction through the relative motion of telescopic link; the slider on the main fixed plate transversely slides along the second guide rail to realize fine adjustment of the focus, so that the radioactive source is positioned more accurately. The purpose of accurate free location of three-dimensional narrow space radioactive source has been realized to the cooperation of main locating plate, slider and telescopic link, has effectively ensured the success rate of the inspection welding seam transillumination in proper order. The collimator is connected with the slider cooperation, rotates around the axis as required and comes the exposure direction, and when the leading source pipe penetrated the collimator through the through-hole, the axis of leading source pipe and the axis of collimator coincided completely, and the extension length is freely adjusted at the journey within range simultaneously, still can restrict the ray direction of radiation source, shields unnecessary ray to the isolation scope is detected a flaw in very big reduction under the prerequisite that satisfies the radiation protection requirement, the better emergence that prevents the mistake and shine the condition.
Drawings
Fig. 1 is a schematic structural diagram of an apparatus for positioning and shielding a gamma ray source according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an apparatus for positioning and shielding a gamma ray source according to another embodiment of the present invention;
fig. 3 is a bottom view of an apparatus for positioning and shielding a gamma ray source according to an embodiment of the present invention;
fig. 4 shows a side view of an apparatus for gamma ray source positioning and shielding in accordance with an embodiment of the present invention;
fig. 5 is a diagram illustrating a verification of an apparatus for positioning and shielding a gamma ray source according to an embodiment of the present invention.
Detailed Description
For further understanding of the present invention, embodiments of the present invention are described below with reference to examples, but it should be understood that these descriptions are only for the purpose of further illustrating the features and advantages of the present invention, and are not intended to limit the present invention.
The embodiment of the utility model discloses a device for gamma ray source location and shielding, as shown in FIG. 1, include: the device comprises a pipeline clamping unit 1, a telescopic rod 2, a first fixing plate 3, a first guide shaft 4, a main positioning plate 5, an axial positioning block 6, a second guide shaft 7, a sliding block 8 and a collimator 9;
one end of the telescopic rod 2 is connected with the pipeline clamping unit 1, and the other end of the telescopic rod is connected with the first fixing plate 3;
the first fixing plate 3 is connected to the lower part of the first guide shaft 4;
the back of the main positioning plate 5 is fixedly connected with an axial positioning block 6, and the front of the main positioning plate is provided with a second guide shaft 7;
the axial positioning block 6 is sleeved on the first guide shaft 4 and slides or is fixed along the first guide shaft 4;
the sliding block 8 is connected with the second guide shaft 7 in a sliding mode, and the top of the sliding block 8 is movably connected with a collimator 9;
the collimator 9, the bottom of which is provided with a threaded through hole, is rotated about an axis to adjust the exposure direction.
According to the utility model discloses, as shown in fig. 2 ~ 5, specifically explain following structure:
preferably, the pipeline clamping unit 1 is composed of two aligned hollow semi-cylindrical clamping grooves, one hollow semi-cylindrical clamping groove is provided with a threaded hole, a pipeline is clamped in a mode that a bolt and a nut are matched to increase pretightening force, the inner wall of the cylindrical groove is completely attached to the outer wall of the pipeline, and the stress on the outer wall of the pipeline is uniform. The rubber ring is arranged in the hollow semi-cylindrical clamping groove and used for buffering, so that the situation that the outer wall of the pipeline is scratched or impacted when the pipeline is clamped is avoided.
One end of the telescopic rod 2 is connected with the pipeline clamping unit 1, and the other end is connected with the first fixing plate 3; preferably, the telescopic rod 2 comprises a long rod and a short rod, one end of the long rod is fixedly connected to the first fixing plate 3, and one end of the short rod is fixedly connected to the hollow semi-cylindrical clamping groove;
the long rod and the short rod are in clearance fit and are positioned and fastened through fastening screws 10. The focus adjustment on the vertical direction of the radioactive source pipeline can be realized through the relative movement of the telescopic rod, a screw hole is processed outside the long rod, and a fastening screw 10 is arranged for fastening the telescopic rod after the positioning in the vertical direction. The telescopic rod 2 can be a hollow rectangular rod.
The first fixing plate 3 is connected to the lower part of the first guide shaft 4; preferably, a second fixing plate 11 is further disposed on the top of the first guide shaft 4; the first fixing plate 3 and the second fixing plate 11 are fixed in a mode that bolts and nuts are matched to apply pretightening force.
Preferably, the first guide shaft 4 comprises 2-4 guide shafts.
The back of the main positioning plate 5 is fixedly connected with an axial positioning block 6, and the front of the main positioning plate is provided with a second guide shaft 7; the axial positioning block 6 is sleeved on the first guide shaft 4 and slides or is fixed along the first guide shaft 4;
preferably, the main fixing plate 5 is bolted to the axial positioning block 6 and can slide along the first guide shaft 4 together with the axial positioning block 6, so as to realize the positioning of the radioactive source along the axial direction of the pipeline.
Preferably, the main fixing plate 5 is further provided with a belt 12 and a stepping motor 13, and the sliding block 8 is connected with the belt 12 through a fixing member; a stepping motor 13 is arranged on one side of the belt 12, and the stepping motor 13 drives the belt 12 to move so that the sliding block 8 moves along the second guide shaft 7.
Preferably, the stepping motor 13 is disposed on the rear surface of the main fixing plate 5.
The slider 8 with second guide shaft 7 sliding connection, slider accessible step motor 13 drive belt 12 carries out lateral sliding and realizes the fine setting to the focus for the radiation source location is more accurate.
The utility model discloses in, can realize the purpose of the accurate free location of three-dimensional narrow space radiation source through the cooperation of main fixed plate 5, slider 8 and telescopic link 2. The success rate of one-time transillumination of the detected welding seam is effectively guaranteed.
The top of the sliding block 8 is movably connected with a collimator 9; preferably, said collimator 9 is screwed to the slider 8 and inserted in a hole in the top of the slider.
The collimator 9, the bottom of which is provided with a threaded through hole, is rotated about an axis to adjust the exposure direction.
Preferably, the collimator 9 is slotted in the middle.
The collimator 9 can rotate around the axis as required to come the exposure direction, when the source guide tube penetrates the collimator 9 through the through hole, the axis of the source guide tube completely coincides with the axis of the collimator 9, the extension length is freely adjusted within the stroke range at the same time, the source guide tube is fixed by the locking nut after reaching the designated position, the collimator is made of a tungsten steel material with better ray shielding performance, the ray direction of a radioactive source is limited by the shape design of the middle slot, unnecessary rays are shielded, the flaw detection isolation range is greatly reduced on the premise of meeting the radiation protection requirement, and the occurrence of the mistaken irradiation condition is better prevented.
The utility model discloses in, each part is the modularized design, adopts screw or bolt and nut fastening mode to connect. Different types of combination installation can be carried out according to actual requirements.
During radiographic inspection, the pipeline is clamped by the pipeline clamping unit, the distance in the vertical direction of the pipeline welding line is adjusted by adjusting the length of the telescopic rod, and the telescopic rod is fastened by fastening screws after positioning. The first guide shaft is fixed by using a fixing plate, the axial distance of the main fixing plate relative to the pipeline welding seam is adjusted by adjusting the axial positioning block to slide on the first guide shaft, and the main fixing plate is fastened by using bolts and nuts after positioning. After the axial positioning of the extension pipeline is completed, the guide source pipe penetrates into the collimator groove from the bottom hole of the sliding block to be fixed by the locking nut after the extension length is adjusted. Then a stepping motor is used for accurately adjusting the position of the sliding block through belt transmission, and the accurate positioning of the radioactive source is completed. And finally, rotating the collimator to adjust the exposure direction.
The above description of the embodiments is only intended to help understand the method of the present invention and its core ideas. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An apparatus for positioning and shielding a gamma ray source, comprising: the device comprises a pipeline clamping unit, a telescopic rod, a first fixing plate, a first guide shaft, a main positioning plate, an axial positioning block, a second guide shaft, a sliding block and a collimator;
one end of the telescopic rod is connected with the pipeline clamping unit, and the other end of the telescopic rod is connected with the first fixing plate;
the first fixing plate is connected to the lower part of the first guide shaft;
the back of the main positioning plate is fixedly connected with an axial positioning block, and the front of the main positioning plate is provided with a second guide shaft;
the axial positioning block is sleeved on the first guide shaft and slides or is fixed along the first guide shaft;
the sliding block is connected with the second guide shaft in a sliding mode, and the top of the sliding block is movably connected with a collimator;
the bottom of the collimator is provided with a threaded through hole, and the exposure direction is adjusted by rotating around an axis.
2. The apparatus according to claim 1, wherein a belt and a stepping motor are further disposed on the main positioning plate, and a stepping motor is disposed on one side of the belt, and the stepping motor drives the belt to move, so that the sliding block moves along the second guide shaft.
3. The apparatus as claimed in claim 2, wherein the stepping motor is disposed on the back of the main positioning plate.
4. The apparatus of claim 2, wherein the collimator is screwed to the sliding block and inserted into a hole on the top of the sliding block.
5. The apparatus of claim 2, wherein the collimator is slotted in the middle.
6. The apparatus of claim 1, wherein the pipe clamping unit comprises two aligned hollow semi-cylindrical clamping slots, one of which is threaded.
7. The apparatus as claimed in claim 6, wherein a rubber ring is disposed in the hollow semi-cylindrical clamping groove.
8. The apparatus as claimed in claim 6, wherein the telescopic rod comprises a long rod and a short rod, one end of the long rod is fixedly connected to the first fixing plate, and one end of the short rod is fixedly connected to the hollow semi-cylindrical clamping groove;
the long rod and the short rod are in clearance fit and are positioned and fastened through fastening screws.
9. The apparatus according to claim 1, wherein a second fixing plate is further disposed on the top of the first guide shaft;
the first fixing plate and the second fixing plate are fixed in a mode that bolts and nuts are matched to apply pretightening force.
10. The apparatus as claimed in claim 1, wherein the number of the first guide shafts is 2-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023273017.4U CN214752967U (en) | 2020-12-30 | 2020-12-30 | Device for positioning and shielding gamma ray source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023273017.4U CN214752967U (en) | 2020-12-30 | 2020-12-30 | Device for positioning and shielding gamma ray source |
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| Publication Number | Publication Date |
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| CN214752967U true CN214752967U (en) | 2021-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023273017.4U Active CN214752967U (en) | 2020-12-30 | 2020-12-30 | Device for positioning and shielding gamma ray source |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114460109A (en) * | 2022-01-14 | 2022-05-10 | 一重集团大连核电石化有限公司 | Movable radioactive source welding seam detection device |
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2020
- 2020-12-30 CN CN202023273017.4U patent/CN214752967U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114460109A (en) * | 2022-01-14 | 2022-05-10 | 一重集团大连核电石化有限公司 | Movable radioactive source welding seam detection device |
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