A Small-diameter Tube X-ray Radiographic Elliptical Projection Locator

Abstract

The invention discloses a small-size tube X-ray radiography elliptical projection positioned which comprises a main body and a laser indicator, wherein the laser indicator comprises a front laser indicator and a rear laser indicator; the front laser indicator is arranged in the center of the front end of the main body; the rear laser indicator is arranged in the center of the rear end of the mainbody; a long groove hole is formed transversely in the main body; a mounting transverse beam is arranged in the center of the long groove hole; measuring claws are arranged on the upper surface of themain body, can relatively slide along the long groove hole, and are arranged in symmetry about the central line of the main body; the measuring claws are perpendicular to the main body; two moving bases connected with the two measuring claws are arranged on the lower surface of the main body; the two moving bases are both connected with racks; a rotating gear is arranged between the two moving bases; the two racks are respectively meshed with two sides of the gear; a fastening bolt penetrates through the gear and is fixedly connected with the mounting transverse beam. An angle between the central line of an orientated X-ray emitter radiation field and a weld joint and an elliptical opening width after radiography are simulated, and the working efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of non-destructive testing of small-diameter tubes, in particular to an X-ray photographic elliptical projection locator for small-diameter tubes. 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 discloses a small-d...

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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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