CN114441564A - Device for indicating the center of radiographic inspection and the radiation exposure area - Google Patents

Abstract

The invention discloses a device for indicating a ray flaw detection center and a ray irradiation area. The optical path diaphragm and the secondary optical path diaphragm are respectively provided with a central slit and an annular slit. The midpoints of the central light source, the primary optical path diaphragm and the central slit of the secondary optical path diaphragm are located on the same axis. The annular slits of the optical path diaphragm and the secondary optical path diaphragm are located on the same ray divergence cone. The device of the invention can effectively solve the problems of accurate positioning and high-quality imaging of radiographic inspection of parts of different sizes and specifications, and can efficiently solve the problem of radiographic inspection of complex multi-wall parts. The device is simple, portable and easy to operate, and can greatly improve the inspection quality and work. Efficiency, significant effect, economical and practical, and help equipment life extension.

Description

Device for indicating the center of radiographic inspection and the radiation exposure area

technical field

The invention belongs to the technical field of material analysis and testing devices, and relates to a device for indicating a radiation flaw detection center and a radiation irradiation area.

Background technique

A shielded lead room is used for radiographic inspection, and the radiographic source and the workpiece to be tested are placed in it for radiographic inspection. In order to obtain a clear and comprehensive image, the position of the radiographic source and the sample are often adjusted so that the The test parts are within the proper radiation exposure range. The position of the DUT has a direct impact on the accuracy of the radiographic inspection results. If the region of interest of the DUT is not located in an appropriate area of the irradiated surface, it is difficult to perform high-quality radiographic inspection and quality assessment of the area.

It is strictly forbidden for personnel to stay in the lead room during radiation irradiation. Therefore, the position of the DUT cannot be adjusted manually during radiation irradiation. The placement and adjustment of the DUT should be placed before irradiation according to experience. It is difficult to accurately determine the radiation exposure range and the center of the range, and the placement of the DUT is often unsatisfactory. The position of the components of geometric shape and size is the problem; the precise flaw detection of the area of interest can only be achieved by repeated debugging methods, in order to obtain high-quality images and photos, the workload is large, the efficiency is low, and repeated loading/unloading in a short period of time. High pressure affects the service life of the equipment.

In order to solve the above problems, there are two main methods currently used. One is to install a "cross-shaped" laser positioning device on the outer wall of the ray irradiation port. However, because the laser source and the ray source are not coaxial, and the laser source itself is slightly inclined It will lead to a large deviation of the indicated position, so it can only roughly indicate the central area, and cannot accurately locate the ray irradiation center, let alone obtain the ray irradiation area. The other is to use a positioning rod (such as a telescope center device), which needs to be held at the ray irradiation port before flaw detection, and the rod head is contacted with the workpiece to be measured through the telescopic rod, so as to obtain the ray irradiation center and the workpiece to the ray source. Although this method can intuitively obtain the ray irradiation center and distance information, it cannot obtain the ray irradiation area range. For complex shell workpieces, the position of the rear wall relative to the ray center still needs to be roughly estimated due to the occlusion of the front wall. It shows that these two methods can not solve the problem of accurate positioning of radiation center and radiation area in the process of radiographic flaw detection.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a device for indicating the radiation inspection center and the radiation irradiation area, which solves the problems of inaccurate positioning and inability to display the radiation radiation area range of the existing device.

The technical scheme adopted by the present invention is that a device for indicating the radiation inspection center and the ray irradiation area includes a fixed casing, a primary optical path diaphragm and a secondary optical path diaphragm connected in sequence, and a central light source is installed on the inner surface of the fixed casing and ring light source, the primary optical path aperture and the secondary optical path aperture are respectively provided with a central slit and an annular slit, and the midpoints of the central light source, the primary optical path aperture and the secondary optical path aperture are located on the same axis. , the annular light source and the annular slits of the primary optical path aperture and the secondary optical path aperture are located on the same ray divergence cone.

Among them, the primary optical path diaphragm is a disc-shaped structure, and the surface is provided with a "cross-shaped" slit A and an annular slit A, and the annular slit A takes the center of the "cross-shaped" slit A as a dot.

The secondary optical path diaphragm is a disc-shaped structure, and the surface is provided with a "cross-shaped" slit B and an annular slit B, and the annular slit B takes the center of the "cross-shaped" slit B as a dot.

Both the annular slit A and the annular slit B are discontinuous annular slits, which are composed of four arcs.

The primary optical path diaphragm and the secondary optical path diaphragm are connected and fixed by a diaphragm fixing frame, and the diaphragm fixing frame is a cylindrical structure.

The fixed casing and the primary optical path diaphragm are fixedly connected by screws A, the fixed casing and the diaphragm fixing frame are fixedly connected by screws B, and the diaphragm fixing frame and the secondary optical path diaphragm are fixedly connected by screws C.

An annular installation groove is arranged on the outer surface of the fixed casing, and the inner diameter of the annular installation groove is the same as the outer diameter of the ray emission port.

The beneficial effect of the present invention is that the use of the device for indicating the irradiation center and the irradiation area of radiographic inspection can effectively solve the problems of accurate positioning and high-quality imaging in radiographic inspection of parts with different sizes and specifications, and can efficiently solve the difficult problem of radiographic inspection of complex multi-wall parts , The device is simple, light and easy to operate, which can greatly improve the quality of flaw detection and work efficiency.

Description of drawings

FIG. 1 is a schematic structural diagram of a device for indicating a radiation inspection center and a radiation irradiation area of the present invention;

FIG. 2 is a schematic view of the front structure of a fixed casing in a device for indicating a radiation inspection center and a radiation irradiation area of the present invention;

3 is a schematic side view of the structure of a fixed casing in a device for indicating a radiation detection center and a radiation irradiation area according to the present invention;

FIG. 4 is a schematic diagram of the optical path principle of a device for indicating the radiation inspection center and the radiation irradiation area of the present invention;

5 is a schematic structural diagram of a primary optical path diaphragm in a device for indicating a radiation inspection center and a radiation irradiation area of the present invention;

6 is a schematic front view of a diaphragm holder in a device for indicating a radiation inspection center and a radiation irradiation area of the present invention;

FIG. 7 is a side structural schematic diagram of a diaphragm fixing frame in a device for indicating a radiographic inspection center and a radiographic irradiation area according to the present invention.

In the figure, 1. Fixed housing, 2. Primary optical path diaphragm, 3. Diaphragm holder, 4. Secondary optical path diaphragm, 5. Center light source, 6. Ring light source, 7. Screw A, 8. Screw B , 9. Screw C, 11. Annular mounting groove, 21. "Cross" slit A, 22. Annular slit A, 41. "Cross" slit B, 42. Annular slit B.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

The present invention is a device for indicating the radiation inspection irradiation center and radiation area. Referring to FIG. 1 to FIG. 3 , it includes a fixed casing 1 , a primary optical path aperture 2 and a secondary optical path aperture 4 , which are connected in sequence. A mounting slot for installing the central light source 5 and the ring light source 6 is provided on the side. The mounting slot of the central light source 5 is located at the center position of the inner side of the fixed housing 1. The position of the mounting slot of the ring light source 6 is based on the actual divergence of the ray tube rays of the radiographic flaw detection equipment. Angle processing (that is, the connection between any point on the installation groove of the ring light source 6 and the center point of the ray, the angle between it and the horizontal direction is the same as the actual divergence angle of the ray tube of the ray flaw detection equipment).

Referring to Fig. 4, the primary optical path aperture 2 and the secondary optical path aperture 4 are respectively provided with a central slit and an annular slit, the central light source 5, the primary optical path aperture 2 central slit and the secondary optical path aperture 4 central slit The center point of the slit and the center point of the ray are located on the same axis, and the annular light source 6 and the annular slits of the primary optical path diaphragm 2 and the secondary optical path diaphragm 4 are located on the same ray divergence cone.

Referring to FIG. 5 , the primary optical path diaphragm 2 is a disc-shaped structure with a “cross-shaped” slit A21 and an annular slit A22 on the surface. The annular slit A22 takes the center of the “cross-shaped” slit A21 as a dot.

The secondary optical path diaphragm 4 is a disc-shaped structure, and the surface is provided with a "cross-shaped" slit B41 and an annular slit B42, and the annular slit B42 takes the center of the "cross-shaped" slit B41 as a dot.

The annular slit A22 and the annular slit B42 are both discontinuous annular slits, which are composed of four arcs.

Referring to FIG. 6 and FIG. 7 , the primary optical path diaphragm 2 and the secondary optical path diaphragm 4 are connected and fixed by the diaphragm fixing frame 3 , and the diaphragm fixing frame 3 is a cylindrical structure.

The fixed casing 1 and the primary optical path diaphragm 2 are fixedly connected by screws A7, the fixed casing 1 and the diaphragm fixing frame 3 are fixedly connected by screws B8, and the diaphragm fixing frame 3 and the secondary optical path diaphragm 4 are fixedly connected by screws C9.

An annular installation groove 11 is provided on the outer surface of the fixed housing 1, and the inner diameter of the annular installation groove 11 is the same as the outer diameter of the ray emission port. The outer wall of the annular installation groove 11 is provided with threaded holes for installation and connection with the ray emission port.

When using the device of the present invention to indicate the radiation inspection center and radiation area, first install the device on the ray emission port, that is, put the annular installation groove 11 on the ray emission port, and fix the annular installation groove 11 with the ray emission port with screws. , place the workpiece to be detected on the sample stage facing the ray emission port, and then turn on the central light source 5 and the ring light source 6, and you can see the radiation irradiation center and irradiation area range in the lead room. If the workpiece to be detected is interested in The area (area to be inspected) is within the range of the illumination area of the ring light source, and the center of the area of interest is basically at the center of the illumination. Remove the device from the ray emission port and enter the radiation irradiation program to achieve high quality of the area of interest of the workpiece to be inspected. Accurate positioning and imaging to complete radiographic inspection. If the area of interest of the workpiece to be inspected is not within the range of the illumination area of the ring light source, adjust the position of the sample stage and the position of the test piece so that the area of interest of the workpiece to be inspected is within the range of the illumination area of the ring light source. , the inclination angle of the workpiece to be tested can be adjusted with reference to the irradiation position of the central light, so that the area of interest is not blocked, and then the workpiece to be tested is subjected to radiographic inspection. When necessary, the area directly irradiated to the imaging plate can be blocked according to the optical path instruction of the device, so as to prolong the service life of the imaging plate and significantly reduce the background influence.

Claims (7)

1. The utility model provides an instruct device of radiographic inspection center and ray irradiation area, a serial communication port, including the fixed casing (1) that connects gradually, primary light path diaphragm (2) and secondary light path diaphragm (4), install central light source (5) and annular light source (6) on fixed casing (1) medial surface, central slit and annular slit have been seted up respectively to primary light path diaphragm (2) and secondary light path diaphragm (4) on equalling divide, central light source (5), the mid point of primary light path diaphragm (2) and secondary light path diaphragm (4) central slit is located the same axis, annular light source (6) and the annular slit of primary light path diaphragm (2) and secondary light path diaphragm (4) are located same ray and diverge on the conical surface.

2. The apparatus for indicating the center of a radiographic inspection and the area to be irradiated with radiation according to claim 1, wherein the primary optical path diaphragm (2) has a disk-like structure, and has a cross-shaped slit a (21) and an annular slit a (22) formed on the surface thereof, and the annular slit a (22) has a circular point at the center of the cross-shaped slit a (21).

3. The apparatus for indicating the center of a radiographic inspection and the area to be irradiated with radiation according to claim 2, wherein the secondary optical path diaphragm (4) has a disk-like structure, and has a cross-shaped slit B (41) and an annular slit B (42) formed on the surface thereof, and the annular slit B (42) has a circular point at the center of the cross-shaped slit B (41).

4. The apparatus for indicating a radiographic inspection center and a radiographic exposure area according to claim 3, wherein each of the annular slit A (22) and the annular slit B (42) is a discontinuous circular slit consisting of four circular arcs.

5. The apparatus for indicating a radiographic inspection center and a radiographic exposure area according to claim 3, wherein the primary optical path diaphragm (2) and the secondary optical path diaphragm (4) are fixedly connected by a diaphragm holder (3), and the diaphragm holder (3) is of a cylindrical structure.

6. The apparatus for indicating a radiographic inspection center and a radiographic exposure area according to claim 5, wherein the stationary housing (1) is fixedly connected to the primary optical path diaphragm (2) by a screw A (7), the stationary housing (1) is fixedly connected to the diaphragm holder (3) by a screw B (8), and the diaphragm holder (3) is fixedly connected to the secondary optical path diaphragm (4) by a screw C (9).

7. The apparatus for indicating the center of a radiographic inspection and a radiographic area according to claim 1, wherein an annular mounting groove (11) is provided on an outer side surface of the stationary housing (1), and an inner diameter of the annular mounting groove (11) is the same as an outer diameter of the radiation emitting port.

Images