A shielding and collimating device for gamma-ray flaw detection point source

Abstract

The present invention belongs to the technical field of ray flaw detection, and specifically relates to a gamma-ray flaw detection point source shielding and collimating device, comprising a gamma-ray shielding and collimating part, a gamma-ray penetration angle adjustment part, a gamma-ray penetration height adjustment part and a supporting part; after the device is inserted into a source guide tube, the penetration position can be flexibly adjusted to meet the needs of various materials or components to be detected on site; the stable tripod support structure has better universal adaptability to the complex ground on site; the contraction and folding functions of each component enable it to have better storage and portability.

Description

Technical Field

[0001] The invention belongs to the technical field of ray flaw detection, and in particular relates to a gamma ray flaw detection point source shielding and collimation device. Background Art

[0002] Radiographic flaw detection is one of the conventional penetrating nondestructive testing methods. Its technology is mature and has a very wide range of applications in industry. The rays can penetrate metal materials to varying degrees and produce photosensitivity on photographic films. Using this property, when the rays pass through the weld being inspected, the intensity of the rays falling on the film is different, and the film's photosensitivity is also different due to the different absorption capacity of the weld defects. In this way, the shape, location and size of the defects can be accurately, reliably and non-destructively displayed.

[0003] Gamma-ray flaw detection does not require power supply, which is convenient for field work, so it is more commonly used in actual work. However, the high-activity radiation source required for gamma-ray flaw detection produces a divergent high-intensity radiation field, in which only a small part of the effective rays penetrate the material to be detected and form an image on the film, and most of the ineffective rays are emitted in a divergent manner in space, resulting in a large isolation range for gamma-ray flaw detection, which increases the difficulty of boundary isolation and area clearance, and there is a risk of accidental exposure of personnel. Summary of the invention

[0004] In view of the above shortcomings, the purpose of the present invention is to provide a gamma-ray flaw detection point source shielding and collimation device, which can reduce the impact range of gamma-ray flaw detection, reduce the difficulty of boundary isolation and area clearance, reduce the risk of accidental exposure of personnel, and improve the safety of gamma-ray flaw detection work by collimating the effective rays and shielding the invalid rays of the high-activity gamma-ray flaw detection point source.

[0005] The technical solution of the present invention is as follows:

[0006] A gamma-ray flaw detection point source shielding and collimating device comprises a gamma-ray shielding and collimating part, a gamma-ray penetrating angle adjusting part, a gamma-ray penetrating height adjusting part and a supporting part;

[0007] The gamma ray shielding and collimating part comprises a gamma ray shielding head; a gamma ray transillumination hole; a hollow chamber of the gamma ray shielding head;

[0008] The gamma ray transillumination angle adjustment part includes a rangefinder; a transillumination angle adjustment column; a hollow chamber in the transillumination angle adjustment column; a longitudinal angle adjustment shaft; and a transverse angle adjustment shaft.

[0009] The gamma ray transillumination height adjustment part comprises a transillumination height adjustment column; a hollow chamber in the transillumination height adjustment column; a transillumination height adjustment column sleeve; and a hollow chamber in the transillumination height adjustment column sleeve;

[0010] The supporting part comprises a telescopic leg sleeve; a telescopic leg; a base; a leg folding bracket; and a source guide tube clamping device.

[0011] The gamma-ray shielding head is provided with a gamma-ray transillumination hole and a gamma-ray shielding head hollow chamber; the gamma-ray shielding head is connected to the transillumination angle adjustment column.

[0012] The illumination angle adjustment column is provided with a rangefinder, a hollow chamber of the illumination angle adjustment column, a longitudinal angle adjustment axis and a transverse angle adjustment axis, wherein the rangefinder is used to measure the exposure distance and then calculate the illumination time, the longitudinal angle adjustment axis and the transverse angle adjustment axis cooperate with each other to jointly adjust the angle of the illumination hole of the device; the transverse angle adjustment axis is closely connected with the illumination height adjustment column.

[0013] The transillumination height adjustment column is provided with a transillumination height adjustment column hollow chamber, and the transillumination height adjustment column sleeve is provided with a transillumination height adjustment column sleeve hollow chamber.

[0014] The transillumination height adjustment column can be freely extended and fixed in the transillumination height adjustment column sleeve.

[0015] The four hollow chambers, namely the hollow chamber of the gamma-ray shielding head, the hollow chamber of the illumination angle adjustment column, the hollow chamber of the illumination height adjustment column and the hollow chamber of the illumination height adjustment column sleeve, are interconnected. The source guide tube is inserted through the source guide tube clamping device, and passes through the hollow chamber of the illumination height adjustment column sleeve of the illumination height adjustment column, the hollow chamber of the illumination height adjustment column of the illumination height adjustment column, and the hollow chamber of the illumination angle adjustment column of the illumination angle adjustment column in sequence, and finally the end of the source guide tube reaches the hollow chamber of the gamma-ray shielding head of the gamma-ray shielding head.

[0016] After the source guide tube is inserted into place, it is fixed by a source guide tube clamping device.

[0017] The transillumination height adjustment column sleeve is sleeved with a telescopic leg sleeve and is connected with three telescopic legs, each telescopic leg is provided with a foot, and the device is supported on the ground by the three feet.

[0018] A leg folding bracket is provided between the three telescopic legs.

[0019] The beneficial effects of the present invention are:

[0020] After the source guide tube is inserted into the device, the transillumination position can be flexibly adjusted to meet the needs of various materials or components to be tested on site;

[0021] The stable tripod support structure has better universal adaptability to the complex ground on site;

[0022] The contraction and folding functions of each component make it more storable and portable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a γ-ray flaw detection point source shielding and collimation device according to the present invention;

[0024] In the figure: 1. γ-ray shielding head; 2. γ-ray transillumination hole; 3. hollow chamber of γ-ray shielding head; 4. rangefinder; 5. transillumination angle adjustment column; 6. hollow chamber of transillumination angle adjustment column; 7. longitudinal angle adjustment axis; 8. transverse angle adjustment axis; 9. transillumination height adjustment column; 10. hollow chamber of transillumination height adjustment column; 11. transillumination height adjustment column sleeve; 12. hollow chamber of transillumination height adjustment column sleeve; 13. telescopic leg sleeve; 14. telescopic leg; 15. base; 16. leg folding bracket; 17. source tube clamping device. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0027] A gamma-ray flaw detection point source shielding and collimating device comprises a gamma-ray shielding and collimating part, a gamma-ray penetrating angle adjusting part, a gamma-ray penetrating height adjusting part and a supporting part.

[0028] The gamma-ray shielding and collimating part comprises a gamma-ray shielding head 1 , a gamma-ray transillumination hole 2 , and a gamma-ray shielding head hollow chamber 3 .

[0029] The gamma-ray penetration angle adjustment part comprises a rangefinder 4 ; a penetration angle adjustment column 5 ; a penetration angle adjustment column hollow chamber 6 ; a longitudinal angle adjustment shaft 7 ; and a transverse angle adjustment shaft 8 .

[0030] The gamma-ray transillumination height adjustment part comprises a transillumination height adjustment column 9 ; a transillumination height adjustment column hollow chamber 10 ; a transillumination height adjustment column sleeve 11 ; and a transillumination height adjustment column sleeve hollow chamber 12 .

[0031] The supporting part includes a telescopic leg sleeve 13 , a telescopic leg 14 , a base 15 , a leg folding bracket 16 , and a source tube clamping device 17 .

[0032] The gamma-ray shielding head 1 is provided with a gamma-ray transillumination hole 2 and a gamma-ray shielding head hollow chamber 3 to guide effective rays and shield invalid rays. The gamma-ray shielding head 1 is closely connected with the transillumination angle adjustment column 5, which is provided with a rangefinder 4, a transillumination angle adjustment column hollow chamber 6, a longitudinal angle adjustment shaft 7 and a transverse angle adjustment shaft 8, wherein the rangefinder 4 is used to measure the exposure distance and then calculate the transillumination time, and the longitudinal angle adjustment shaft 7 and the transverse angle adjustment shaft 8 cooperate with each other to jointly adjust the angle of the transillumination hole of the device. The transverse angle adjustment shaft 8 is closely connected with the transillumination height adjustment column 9, which is provided with a transillumination height adjustment column hollow chamber 10, and the transillumination height adjustment column 9 can be freely extended and fixed in the transillumination height adjustment column sleeve 11, which is used to adjust the height of the transillumination hole of the device, and is also convenient for carrying after contraction, and the transillumination height adjustment column sleeve 11 is provided with a transillumination height adjustment column sleeve hollow chamber 12. The four hollow chambers, namely the hollow chamber 3 of the γ-ray shielding head, the hollow chamber 6 of the illumination angle adjustment column, the hollow chamber 10 of the illumination height adjustment column and the hollow chamber 12 of the illumination height adjustment column sleeve, are interconnected. The source tube is inserted through the source tube clamping device 17, and passes through the hollow chamber 12 of the illumination height adjustment column sleeve 11, the hollow chamber 10 of the illumination height adjustment column 9, and the hollow chamber 6 of the illumination angle adjustment column 5 in turn, and finally the end of the source tube reaches the hollow chamber 3 of the γ-ray shielding head 1. After the source tube is inserted into place, it is fixed by the source tube clamping device 17. A telescopic leg sleeve 13 is sleeved on the irradiation height adjustment column sleeve 11 and is connected to three telescopic legs 14. Each telescopic leg 14 is provided with a foot 15. The device is supported on the ground by the three feet 15 and has better universal adaptability to the complex ground on site. Considering the stability of the telescopic legs 14 on the ground, leg folding brackets 16 are provided between the three telescopic legs 14 to ensure the maximum stretching size between the legs and provide pulling force.

[0033] In the drawings of the embodiments disclosed in the present invention, only the methods related to the embodiments disclosed in the present invention are involved, and other methods can refer to the general design. In the case of no conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A gamma-ray flaw detection point source shielding and collimating device, comprising a gamma-ray shielding and collimating part, a gamma-ray penetration angle adjustment part, a gamma-ray penetration height adjustment part and a supporting part; Features: The gamma ray shielding and collimating part comprises a gamma ray shielding head; a gamma ray transillumination hole; a hollow chamber of the gamma ray shielding head; The gamma ray transillumination angle adjustment part includes a rangefinder; a transillumination angle adjustment column; a hollow chamber in the transillumination angle adjustment column; a longitudinal angle adjustment shaft; and a transverse angle adjustment shaft. The gamma ray transillumination height adjustment part comprises a transillumination height adjustment column; a hollow chamber in the transillumination height adjustment column; a transillumination height adjustment column sleeve; and a hollow chamber in the transillumination height adjustment column sleeve; The supporting part includes a telescopic leg sleeve; a telescopic leg; a bottom foot; a leg folding bracket; and a source guide tube clamping device; The illumination angle adjustment column is provided with a rangefinder, a hollow chamber of the illumination angle adjustment column, a longitudinal angle adjustment shaft and a transverse angle adjustment shaft, wherein the rangefinder is used to measure the exposure distance and then calculate the illumination time, the longitudinal angle adjustment shaft and the transverse angle adjustment shaft cooperate with each other to jointly adjust the angle of the illumination hole of the device; the transverse angle adjustment shaft is closely connected with the illumination height adjustment column; The transillumination height adjustment column is provided with a transillumination height adjustment column hollow chamber, and the transillumination height adjustment column sleeve is provided with a transillumination height adjustment column sleeve hollow chamber; The transillumination height adjustment column sleeve is sleeved with a telescopic leg sleeve and connected with three telescopic legs, each telescopic leg is provided with a foot, and the device is supported on the ground by the three feet; A leg folding bracket is provided between the three telescopic legs.

2. A gamma-ray flaw detection point source shielding and collimation device as claimed in claim 1, characterized in that: The gamma-ray shielding head is provided with a gamma-ray transillumination hole and a gamma-ray shielding head hollow chamber; the gamma-ray shielding head is connected to the transillumination angle adjustment column.

3. A gamma-ray flaw detection point source shielding and collimation device as claimed in claim 1, characterized in that: The transillumination height adjustment column can be freely extended and fixed in the transillumination height adjustment column sleeve.

4. A gamma-ray flaw detection point source shielding and collimation device as claimed in claim 1, characterized in that: The four hollow chambers, namely the hollow chamber of the gamma-ray shielding head, the hollow chamber of the illumination angle adjustment column, the hollow chamber of the illumination height adjustment column and the hollow chamber of the illumination height adjustment column sleeve, are interconnected. The source guide tube is inserted through the source guide tube clamping device, and passes through the hollow chamber of the illumination height adjustment column sleeve of the illumination height adjustment column, the hollow chamber of the illumination height adjustment column of the illumination height adjustment column, and the hollow chamber of the illumination angle adjustment column of the illumination angle adjustment column in sequence, and finally the end of the source guide tube reaches the hollow chamber of the gamma-ray shielding head of the gamma-ray shielding head.

5. A gamma-ray flaw detection point source shielding and collimation device as claimed in claim 4, characterized in that: After the source guide tube is inserted into place, it is fixed by a source guide tube clamping device.

Images