Nuclear power plant pipeline radiographic inspection tool rack

Abstract

The invention discloses a nuclear power plant pipeline radiographic inspection tool rack which comprises a radioactive source guide pipe, a horizontal supporting mechanical arm, a main fixing frame, afilm and the like. A through hole is formed in the center of the main fixing frame, and a plurality of fixing bolts are evenly arranged in the circumferential direction of the main fixing frame and used for arranging a detected pipeline at the center through hole of the main fixing frame and fastening the detected pipeline through the fixing bolts. The vertical supporting mechanical arm is connected with the film connecting mechanical arm through the connecting mechanical arm, the top of the vertical supporting mechanical arm is connected with one end of the horizontal supporting mechanical arm, the radioactive source guide pipe is arranged on the horizontal supporting mechanical arm, the top of the film connecting mechanical arm is provided with the film fixing device, and the film is arranged on the film fixing device. A traditional nuclear power plant radiographic inspection arrangement mode is changed, the tool rack is arranged on the outer wall of the pipeline, and the effects offormulating process adjustment in advance, reducing arrangement time and frequency, achieving automatic integrated operation, reducing radiation dosage, improving work efficiency and improving equipment safety can be achieved.

Description

technical field [0001] The invention belongs to the field of non-destructive testing, and in particular relates to a nuclear power plant pipe ray inspection tool rack, which is used in the nuclear power plant pipe ray inspection, can effectively arrange radioactive sources and negative films, simplify the preliminary preparation steps in the ray inspection work, and reduce the layout time and cost. The number of times improves the efficiency and safety of radiographic flaw detection. Background technique [0002] At present, the radiographic inspection work of nuclear power plants mainly carries out preventive, corrective and transformation inspections and other radiographic inspections for some pressure pipelines. Pipeline dimensions and specifications vary according to the actual conditions on site. The nuclear island uses nuclear-grade materials, while the conventional island uses non-nuclear-grade materials. The radiographic testing standards used by each level are also ...

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Problems solved by technology

[0004] 1. The traditional layout method needs to use rubber bands or paper tapes to arrange the radioactive source catheter. According to the requirements of the regulations, assuming that the transillumination is performed 3 times, the radioactive source catheter needs to be arranged three times. Possibility of slices;

[0005] 2. Once the radioactive source is abnormal in the traditional layout method, it is necessary to remove the paper tape or rubber band placed on the radioactive source catheter. There are many steps to deal with the abnormality and it is difficult;

[0006] 3. It is necessary to prepare and use a tape measure to measure the focal length. The convenience during the layout is poor, and the preparation time is increased. At the same time, there is a possibility of being left on the site or inside the equipment components, which will bring foreign matter risks to the nuclear power plant;

[0007] 4. The layout of the negatives is also arranged with rubber bands or paper tapes. During the layout, the rubber bands and paper tapes enter the film transillumination area, which may affect the imaging of the negatives and cause the possibility of waste films. possible;

[0008] 5. There are doses in some pipelines in the nuclear island, and the layout time is long, which increases the cumulative absorbed dose of personnel, which is not conducive to the optimal management of dose, and the radiation dose may cause personal injury

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