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

A technology of membrane wall tubes and power plant boilers, which is applied in the use of radiation for material analysis, etc., can solve problems such as missed detection of defects, hidden dangers of unit safe operation, etc., and achieve the effect of ensuring safe operation

Inactive Publication Date: 2015-06-10
CHONGQING QINENG ELECTRICITY & ALUMINUM
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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 i

Method used

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

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Embodiment Construction

[0034] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for illustrating the present invention, but not for limiting the protection scope of the present invention.

[0035] figure 1 The flow chart of the X-ray detection method for the blind area of ​​the welded seam of the membrane wall tube of the power plant boiler provided by the embodiment of the present invention is shown in the figure: the X-ray detection method of the blind area of ​​the welded seam of the membrane type wall tube of the power plant boiler provided by the present invention includes the following steps:

[0036] S1: Set the X-ray machine at the side where the workpiece needs to be transilluminated;

[0037] S2: stick the dark bag containing the film on the other side of the workpiece, and attach the anti-scatter lead plate to the back of the dark bag;

[003...

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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...

Claims

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Application Information

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IPC IPC(8): G01N23/04
Inventor 李长勇朱宗发冉森徐海超陆怀东王宏伟
Owner CHONGQING QINENG ELECTRICITY & ALUMINUM
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