Power station boiler membrane panel welding joint blind area X ray detection method

Abstract

The invention discloses a power station boiler membrane panel welding joint blind area X ray detection method. The method comprises the following steps: firstly, placing a ray machine on one side of a to-be-radiated workpiece; adhering a camera bag containing films to the other side of the workpiece, and adhering the back of the camera bag to an anti-scatter lead plate; then, regulating the position of the X machine so as to regulate an included angle between a radiating centerline and the plane of a heated surface tube to 40-50 degrees; acquiring a welding joint blind area X ray image film by virtue of the X machine; and finally, processing the X ray image film in a darkroom. According to the detection method disclosed by the invention, the XXQ-2505 ray machine is adopted to detect power station boiler membrane panel welding joint blind area X ray and an appropriate radiating angle is selected by virtue of inclined radiation so as to achieve a purpose of detecting out defects; when radiating the membrane panel welding joint, an appropriate angle is kept between the centerline of a ray bundle and the drainage plane of the heated surface tube, so that the definition, sensitivity and welding joint opening distance of a blind area image on a photographic plate can achieve standard requirements, and assessment on defects is not affected.

Description

technical field [0001] The invention relates to the field of detection of power station boilers, in particular to an X-ray detection method for blind areas of welding seams of membrane wall tubes of power station boilers. Background technique [0002] In the installation process of membrane wall tube welds in power plant boilers, due to the limitation of the welding position, the weld joints usually form two joints at the adjacent ear positions between the tubes. Due to the high probability of defects at the joints affected by the structure, if the conventional radiographic operation method is adopted, the joints are just in the blind area of ​​radiographing, which may easily cause missed detection of defects and cause hidden dangers to the safe operation of the unit in the future. [0003] Therefore, there is a need for a method that can quickly and accurately detect defects in blind areas. Contents of the invention [0004] In view of this, the technical problem to be s...

AI Technical Summary

Problems solved by technology

Due to the high probability of defects at the joints affected by the structure, if the conventional radiographic operation method is used, the joints are just in the blind area of ​​radiographing, which may easily cause missed detection of defects and cause hidden dangers to the safe operation of the unit in the future

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