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Method and device for confirming irradiation orientation of pressure container weld seam ray detecting ray bundle

A technology for radiographic inspection and pressure vessels, which is applied in the field of determining the orientation of radiation beams for radiographic inspection of pressure vessel welds, can solve the problems of wasting test films, affecting testing costs and work efficiency, etc., to reduce film waste, improve work efficiency, Guarantee the effect of testing quality

Inactive Publication Date: 2007-09-12
CFHI DALIAN HYDROGENANT REACTOR
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AI Technical Summary

Problems solved by technology

To determine the best transillumination position, many test films need to be wasted, which directly affects the detection cost and work efficiency

Method used

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  • Method and device for confirming irradiation orientation of pressure container weld seam ray detecting ray bundle
  • Method and device for confirming irradiation orientation of pressure container weld seam ray detecting ray bundle
  • Method and device for confirming irradiation orientation of pressure container weld seam ray detecting ray bundle

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Embodiment Construction

[0027] Now in conjunction with accompanying drawing, the present invention is described in further detail as follows:

[0028] Utilize the high-energy ray machine-electron linear accelerator to transilluminate the girth weld 1 of the cylindrical pressure vessel. First, the casing 6 of the device of the present invention is nested with the X-ray head 7, and the positioning laser pointer 4 is installed and fixed on the front end of the casing 6. The axes of the device 4 coincide with each other; two dividers with directional laser pointers 5 and meshing gears 8 and gear boxes are fixed on the two adjacent faces of the regular square prism housing 6, and ensure that each divider The axis of the opening and closing hinge is perpendicular to the axis of the positioning laser pointer 4 , and the angle bisector of each divider is parallel to the axis of the positioning pointer 4 . Then adjust the angle between the two pairs of directional laser pointers 5 to make it suitable for the...

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Abstract

This invention relates to a method and device of ascertain ray bundle transillumination azimuth of pressure container seam ray detecting. The invention base on the tangent length theorem and angle bisector theory in geometry, and adopt color Laser Beam emitted by minitype laser display. first lock locating Laser Beam at pressure container weld external transillumination point, regulate dimensional orientation of ray handpiece, make locating Laser Beam facula connecting line partly plumb and parallel with weld; at the same time orient Laser Beam's facula partly locate at equidistant position of both sides of transillumination point locating Laser Beam's facula; finally fixing dimensional orientation of ray handpiece, moving away orient laser display, carrying out ray detection without obstacle. Adopting this invention, detecting person can base on shape trait of pressure vessel and weld, utilize the position , space and such on information of beam spot that laser formed at pressure vessel surface, to ascertain dimensional orientation of transillumination ray bundle, thereby guarantee detecting quality, advance work efficiency, decrease film wasting.

Description

technical field [0001] The invention relates to the radiation detection of pressure vessels, in particular to a method and a device for determining the transillumination orientation of the pressure vessel weld seam radiation detection radiation beam. Background technique [0002] The rapid development of petrochemical and nuclear industries has continuously put forward higher requirements for the safety of pressure vessels, and it is hoped that the manufacturing industry will adopt or implement stricter testing specifications and standards as much as possible. The girth weld of a pressure vessel directly affects the airtightness and safety of the vessel, and 100% radiographic inspection is usually required. During the inspection, in order to make the film on the back of the transillumination point of the inspected weld seam evenly sensitive, it is required that the transillumination ray coincide with the surface normal of the point as much as possible at the transilluminatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/18G01M3/00
Inventor 刘洪杰刘立群谭家隆张富生
Owner CFHI DALIAN HYDROGENANT REACTOR
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