Visualized thick-walled metal pipe welding joint gamma source central transillumination positioning device
A technology for metal pipes and welded joints, which is applied in the field of gamma source center transillumination positioning devices for visualizing thick-walled metal pipes welded joints, can solve the problems of low work efficiency and unstable quality in radiographic inspection of large and thick-walled metal pipes, and achieves the time of transillumination. Shortening, excellent sensitivity, little effect of scattered rays
Active Publication Date: 2020-05-19
中国石油天然气第一建设有限公司
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to provide a visual positioning device for γ-source center transillumination of welded joints of thick-walled metal pipes, which can realize visual and accurate positioning during transillumination of γ-source centers of welded joints of metal pipes connected by multiple elbows, so as to solve Problems of low efficiency and unstable quality of radiographic inspection of large thick-walled metal pipes in industrial installations
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Embodiment 1
[0044] As shown in the accompanying drawings, the visible thick-walled metal pipe welding joint gamma source central transillumination positioning device of this patent includes: a positioning bracket unit, a gamma source storage and delivery positioning unit, a video transmission and positioning unit;
[0045] The gamma source storage and delivery positioning unit is set in the hollow channel set by the positioning bracket unit, and the video transmission and positioning unit is set at the front end of the positioning bracket unit;
[0046] The positioning bracket unit includes a front combined support frame, a rear combined support frame and a connecting structure between supports; wherein, the front combined support frame includes a cavity type support middle body 41, three support arms arranged on the cavity type support middle body 41 , the double roller group mechanism 43 that three support arm front ends are respectively arranged; The rear combined support frame also inc...
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The invention relates to a visualized thick-wall metal pipeline welded joint gamma-source center transillumination positioner. The visualized thick-wall metal pipeline welded joint gamma-source center transillumination positioner comprises a positioning support unit, a gamma-source accommodation and conveying positioning unit, and a video transmission and positioning unit; the positioning support unit comprises a front combined-type bracing frame, a rear combined-type bracing frame and a connection structure between the bracing frames; the gamma-source accommodation and conveying positioning unit is arranged in a hollow channel of the positioning support unit, and the video transmission and positioning unit is arranged at a front end of the positioning support unit. The visualized thick-wall metal pipeline welded joint gamma-source center transillumination positioner has the beneficial effects that he blackness degree of a negative film and the sensitivity are better, the scattered ray influence is little, and the defect detection rate is high. The center transillumination positioner is not influenced by any station during industrial pipeline welded joint weld detection, after using the transillumination positioner, the transillumination time is greatly shortened, and the work efficiency is obviously increased.
Description
technical field [0001] The invention relates to a gamma source center transillumination technology for welded joints of metal pipes connected by multiple elbows, in particular to a visual positioning device for gamma source center transillumination of welded joints of thick-walled metal pipes. Background technique [0002] Flaw detection is also called "non-destructive testing", which is a technology to check whether there are defects in the metal surface and welded joints. Generally, the internal defects of welded joints include pores, cracks, slag, incomplete penetration, incomplete fusion, etc. Commonly used non-destructive testing methods for internal defects of welded joints include ultrasonic testing (ultrasonic testing and TOFD), and radiographic testing (X-ray and γ-ray). Radiographic inspection uses X-rays or γ-rays to penetrate the weld metal, and exposes it with a photographic negative, and makes the image into a photographic negative, which can be inspected at a...
Claims
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IPC IPC(8): G01N23/04B23K31/12
CPCB23K31/125G01N23/04
Inventor 徐承尧杨亚星于成科李鹏王云峰付红敏
Owner 中国石油天然气第一建设有限公司