Gamma ray micro-radiation flaw detection combined grating

Abstract

The utility model provides a gamma ray micro-radiation flaw detection combined grating. The gamma ray micro-radiation flaw detection combined grating comprises a micro-radiation shielding part and a grating part, the grating part is a frustum part made of a high-density material for shielding gamma rays, and the center of the grating part is provided with a through radiation window; the micro-radiation shielding part is provided with a grating embedding port used for being embedded into the grating part in a sealed and matched mode, and the embedded radiation window and the ray channel are communicated with the center line. According to the technical scheme, only a conventional gamma ray flaw detector is arranged, and the purpose of a micro-radiation flaw detection technology is achieved by matching, butting and combining the conventional gamma ray flaw detector with the micro-radiation shielding part; and the grating part with a detachable assembly structure is adopted, so that the equipment configuration requirement and the capital investment pressure are further comprehensively reduced, and the investment risks of resource overstock and excessive waste are greatly reduced.

Description

Technical Field

[0001] This patent application relates to a non-destructive testing gamma ray flaw detector, and particularly to an exposure grating for a gamma ray flaw detector for micro-radiation applications. Background Art

[0002] Currently, for micro-radiation flaw detection applications, gamma ray flaw detectors specially designed for the detection of special components are mainly used. The micro-radiation window is arranged inside the machine body, and the micro-radiation degree is controlled by controlling the opening and closing of the window or moving the radiation source to the position of the window. Such gamma ray flaw detectors are designed for the flaw detection of special structures and are not suitable for most detection application scenarios other than specific workpieces. Therefore, for a variety of detection projects, the construction party needs to equip both conventional portable gamma ray flaw detectors and micro-radiation gamma ray flaw detectors with different radiation specifications. To complete a complete set of detection projects, the construction party has a large capital investment. After the current project is completed, the customized micro-radiation gamma ray flaw detector is difficult to be used effectively, resulting in actual technical problems such as resource backlog and excessive waste. Summary of the Invention

[0003] The invention objective of this patent application is to solve the technical problems that when there is also a need for micro-radiation flaw detection in the detection project, in addition to equipping a conventional portable gamma ray flaw detector, a micro-radiation gamma ray flaw detector with multiple radiation specifications needs to be equipped, resulting in a large number of devices, a large capital investment, a heavy maintenance workload, and serious resource backlog and waste, and to provide a gamma ray micro-radiation flaw detection combined grating.

[0004] The technical solution of the gamma ray micro-radiation flaw detection combined grating provided by this patent application is mainly as follows:

[0005] A gamma ray micro-radiation flaw detection combined grating, which comprises a micro-radiation shielding part and a grating part;

[0006] The grating part is a frustum-shaped component made of a high-density material for shielding gamma rays, and a through radiation window is provided at its center;

[0007] The micro-radiation shielding part is a ray shielding body made of a high-density material for shielding gamma rays, and it has a docking surface that coincides with the source output end face of a general gamma ray flaw detector; a radiation source channel that is in through docking with the source channel of the general gamma ray flaw detector after docking is provided at the center of the micro-radiation shielding part, and a ray channel that is vertically communicated with the radiation source channel;

[0008] A grating insertion opening for hermetically fitting and embedding the grating part is also provided on the micro-radiation shielding part, and the radiation window after embedding is in the same central line communication with the ray channel.

[0009] One preferred option in the above overall technical solution is that the gamma-ray flaw detector is preferably a portable straight-channel gamma-ray flaw detector.

[0010] One preferred option in the above overall technical solution is that the grating part is preferably a frustum-shaped cone component.

[0011] One preferred option in the above overall technical solution is that the radiation window is a fan-shaped window with a certain opening angle from the inside to the outside.

[0012] One preferred option in the above overall technical solution is that the grating part has an annular sealing platform around the periphery of the radiation window end at its inner end.

[0013] One preferred option in the above overall technical solution is that the grating part is fixed to the micro-radiation shielding part by a fixed pressing plate and fixed bolts.

[0014] One preferred option in the above overall technical solution is that the fixed pressing plate is a square sheet with a central hole;

[0015] For the grating part, an annular notch that fits with the central hole of the fixed pressing plate is provided at the fixed end of the pressing plate, and bolt holes are correspondingly opened at the four corners of the square of the fixed pressing plate and on the micro-radiation shielding part.

[0016] The gamma-ray micro-radiation flaw detection combined grating technical solution disclosed in this patent application realizes the purpose of micro-radiation flaw detection technology by only equipping a conventional gamma-ray flaw detector and mating and combining it with a micro-radiation shielding part; in addition, the grating part with a detachable assembly structure is adopted, which is convenient for the detection operator to replace the grating part with the corresponding ray window size specification according to the micro-radiation detection requirements, further comprehensively reducing the equipment configuration requirements and the pressure of capital investment, and greatly weakening the investment risks of resource backlog and excessive waste. This technical solution meets the requirements of detection safety and can be applied to the radiation environment safety technical requirements of multiple construction project operation sites. Brief Description of the Drawings

[0017] Figure 1 It is a combined structure diagram showing a portable straight-channel gamma-ray flaw detector combined into a micro-radiation gamma-ray flaw detector.

[0018] Figure 2 It is the main front view of this patent application.

[0019] Figure 3 It is the sectional structure diagram of this patent application.

[0020] Figure 4 and Figure 5 They are respectively the main view structure diagram and the B-B sectional view structure diagram of the fixed pressing plate.

[0021] Figure 6a 、 Figure 6b, Figure 6c They are respectively the front view, the top view structure diagram, and the three-dimensional structure diagram of an embodiment of the grating part.

[0022] Figure 7a , Figure 7b , Figure 7c They are respectively the front view, the top view structure diagram, and the three-dimensional structure diagram of the second embodiment of the grating part.

[0023] Figure 8a , Figure 8b , Figure 8c They are respectively the front view, the top view structure diagram, and the three-dimensional structure diagram of the third embodiment of the grating part. Detailed implementation manners

[0024] The gamma-ray micro-radiation flaw detection combined grating of the present patent application will be described in detail below through embodiments.

[0025] The gamma-ray micro-radiation flaw detection combined grating of the present invention comprises a micro-radiation shielding part 2 and a grating part 21.

[0026] The micro-radiation shielding part 2 is a gamma-ray shielding body made of a high-density material for shielding gamma rays. One end thereof has a docking surface 11 that is hermetically butted with the source output end surface of the general gamma-ray flaw detector 1. As Figure 1 shown, the two are hermetically butted and assembled into a micro-radiation gamma-ray flaw detector for micro-radiation detection of non-destructive flaw detection of special workpieces.

[0027] The gamma-ray flaw detector should preferably be a portable straight-channel gamma-ray flaw detector.

[0028] Inside the micro-radiation shielding part 2, a through radiation source channel 8 is provided at the center. After being butted and assembled with the gamma-ray flaw detector 1, the source channel 6 of the gamma-ray flaw detector 1 is butted and communicated with the radiation source channel 8 of the micro-radiation shielding part 2 to ensure that the radiation source 7 can smoothly enter the radiation source channel 8 of the micro-radiation shielding part 2 from the gamma-ray flaw detector 1.

[0029] Inside the micro-radiation shielding part 2, a ray channel 9 that is vertically communicated with the radiation source channel 8 is also provided.

[0030] A positioning bolt 4 is spirally assembled at the front end of the radiation source channel 8. Before leaving the factory, the exposure position of the radiation source is determined by adjusting the positioning bolt 4, and then the working position of the radiation source is locked by a locking nut 16.

[0031] The grating part 21 is a frustum-shaped part made of a high-density material for shielding gamma rays, preferably a conical frustum-shaped part, and a radiation window 3 penetrates through the center thereof.

[0032] The radiation window 3, as Figure 3The direction shown is a fan-shaped window with a certain opening angle from top to bottom. As Figure 4 , Figure 5 and as shown in Figure 6, according to the requirements of actually detecting different micro-radiation amounts, a grating part with different window widths can be equipped so that the detection operator can preferably select the grating part 21 with the corresponding window specifications.

[0033] The micro-radiation shielding part 2 is provided with a grating socket 10 capable of hermetically embedding the grating part 21. After the grating part 21 is embedded in the grating socket 10 of the micro-radiation shielding part 2, the radiation window 3 of the grating part 21 is in the same center line communication with the ray channel 9 of the micro-radiation shielding part 2, and the radiation can only pass through the radiation window 3, and the periphery is strictly shielded.

[0034] To ensure that the detected rays do not leak after the fitting and assembly, a circular ring sealing platform 28 should be provided around the periphery of the radiation window end at the inner end of the grating part 21, and the circular ring sealing platform 28 forms a fitting and sealing surface around the ray channel 9 to effectively avoid the leakage of the detected rays.

[0035] The grating part 21 is fixed to the micro-radiation shielding part 2 by a fixing pressing plate 22 and fixing bolts. In this embodiment, the fixing pressing plate 22 is a square sheet body with a central hole.

[0036] As Figure 2 , Figure 4 , Figure 5 and as shown in Figure 6, the pressing plate fixing end of the grating part 21 is provided with an annular notch 20 that fits with the central hole of the fixing pressing plate 22. Bolt holes 23 are correspondingly opened at the four corners of the square of the fixing pressing plate 22 and on the micro-radiation shielding part 2, and the grating part 21 is fixed to the micro-radiation shielding part 2 by fixing bolts.

[0037] For convenient and quick installation, a convex-concave limiting part 24 is provided between the edge of the central hole of the fixing pressing plate 22 and the annular notch 20 of the grating part 21.

Claims

1. A gamma-ray micro-radiation flaw detection combined grating, characterized in that, It comprises a micro-radiation shielding part (2) and a grating part (21); The described grating part (21) is a frustum-shaped component made of a high-density material for shielding gamma rays, and a through radiation window (3) is provided at its center; The described micro-radiation shielding part (2) is a radiation shielding body made of a high-density material for shielding gamma rays, and it has a docking surface (11) that coincides with the source output end face of a general gamma ray flaw detector; a radiation source channel (8) that is in through-docking connection with the source channel of the general gamma ray flaw detector after docking is provided at the center of the micro-radiation shielding part (2), and a ray channel (9) that is vertically communicated with the radiation source channel (8); A grating insertion opening (10) for hermetically fitting and inserting the grating part (21) is further provided on the micro-radiation shielding part (2), and the radiation window (3) after being installed is in coaxial communication with the ray channel (9).

2. The gamma-ray micro-radiation flaw detection combined grating according to claim 1, wherein The described gamma ray flaw detector is preferably a portable straight-channel gamma ray flaw detector.

3. The gamma-ray micro-radiation flaw detection combined grating according to claim 1, wherein The described grating part (21) is a conical frustum component.

4. The gamma-ray micro-radiation flaw detection combined grating according to claim 1, wherein The described radiation window (3) is a fan-shaped window with a certain opening angle from the inside to the outside.

5. The gamma-ray micro-radiation flaw detection combined grating according to claim 1 or 4, characterized in that, The grating part (21) has a circular ring sealing platform (28) around the periphery of the radiation window end at its inner end.

6. The gamma-ray micro-radiation flaw detection combined grating according to claim 1, characterized in that, The described grating part (21) is fixed to the micro-radiation shielding part (2) by a fixing pressing piece (22) and fixing bolts.

7. The gamma-ray micro-radiation flaw detection combined grating according to claim 6, characterized in that, The described fixing pressing piece (22) is a square sheet body with a central hole; The grating part (21) has an annular notch (20) at its pressing piece fixing end that fits with the central hole of the fixing pressing piece (22), and bolt holes are correspondingly opened at the four square corners of the fixing pressing piece (22) and on the micro-radiation shielding part (2).

8. The gamma-ray micro-radiation flaw detection combined grating according to claim 7, characterized in that, A convex-concave limiting part (24) is provided between the edge of the central hole of the fixing pressing piece (22) and the annular notch (20) of the grating part (21).

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