Small-diameter tube X-ray radiography elliptical projection positioner with adjusting knob

Abstract

The invention discloses a small-diameter tube X-ray radiography elliptical projection positioner with an adjusting knob. The small-diameter tube X-ray radiography elliptical projection positioner withthe adjusting knob comprises a positioner body; a laser indicator is composed of a front laser indicator unit and a rear laser indicator unit, wherein the front laser indicator unit is arranged in the center of the front end of the positioner body, and the rear laser indicator unit is arranged in the center of the rear end of the positioner body; the positioner body is transversely provided witha long slot hole, and the center of the long slot hole is provided with a mounting beam; the positioner body is provided measuring jaws sliding opposite to each other, which are perpendicular to the positioner body; the lower surface of the positioner body is provided with two moving seats connected with the measuring jaws, and the two moving seats are respectively connected with a rack; a rotatable gear is arranged between the two moving seats, the two racks are engaged with both sides of the gear, the lower end of the gear is provided with a circle of flange, and the lower end of the flangeis provided with a lower cylinder; the adjusting knob is arranged on the lower cylinder in a sleeve mode and can simulate the angle between the central line of the radiation field of a directional X-ray machine and a welding joint as well as the width of an elliptical opening after X-ray radiograph, thereby improving the working efficiency.

Description

technical field [0001] The invention belongs to the technical field of non-destructive testing of small-diameter tubes, in particular to a small-diameter tube X-ray photographic elliptical projection positioner with an adjusting knob. Background technique [0002] At present, for the small-diameter tubes known in the field of non-destructive testing, the standards require that the maximum distance between the upper and lower projections of the elliptical opening width formed on the film should be 3 mm to 10 mm. Calculate the distance formula, Lo=[ F-Do+Δh ]×b+q / Do+Δh, F--focal length, Do--outer diameter of small-diameter pipe, Lo--eccentricity, Δh-- weld reinforcement, b—the width of the weld, q—the opening width of the ellipse (the distance in the direction of the short axis of the ellipse image), if you want to measure and calculate small-diameter tubes of different types and specifications, it will greatly increase the working time. [0003] Patent No.: ZL201510656954.2...

AI Technical Summary

Problems solved by technology

[0006] Step 3. Place the X-ray machine. Place the X-ray machine on the side of the small-diameter tube equipped with a positioning ruler, measure the focal length, and at the same time make the laser line emitted by the laser pointer perpendicular to the window of the X-ray machine and pass through the center of the window to complete the placement of the X-ray machine. , a small-diameter tube X-ray elliptical projection positioning ruler involved in the above-mentioned patent needs to use the second square and the first square, although it can accurately shoot qualified negatives, but in comparison, using two The squares are operated separately, which makes the operation inconvenient

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