Device and method for measuring outer diameter and roundness of large-diameter gas cylinder

Abstract

The invention belongs to the field of measurement technologies, and discloses a device and a method for measuring the outer diameter and roundness of a large-diameter gas cylinder. The device for measuring the outer diameter and roundness of the large-diameter gas cylinder disclosed by the invention comprises a rigid right-angled frame (1) composed of a vertical bar (12) and a cross-bar (11) located at the lower end of the vertical bar, wherein the upper end of the vertical bar (12) is fixedly connected with a sliding chute I (6) horizontally arranged; a cantilever cross-bar (4) is located at the upper end of the vertical bar (12), and arranged in parallel to the cross-bar (11). The device also comprises a graduated scale (3) parallel to the vertical bar (12), wherein scales of the graduated scale (3) are sequentially increased from top to bottom; the upper end of the graduated scale (3) is slidably cooperated with a sliding chute II (5) on the cantilever cross-bar; and the lower end of the graduated scale (3) is connected with a strip block (2) parallel to the cross-bar (11). The device and method disclosed by the invention play a positive role in the geometrical quality inspection and quality control of the outer diameter and roundness of the gas cylinder subjected to heat treatment, the versatility is good, and the detection cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of measurement, and relates to a measuring device and method for measuring the outer diameter and roundness of a large-diameter gas cylinder, in particular to a measuring device and a measuring method for the outer diameter and roundness of a large-diameter gas cylinder with a diameter greater than 200 mm. Background technique [0002] In the manufacturing process of emerging energy storage and transportation pressure vessels (such as large-diameter seamless gas cylinders), according to the requirements of process technology, an overall heat treatment process is required. Due to the deformation caused by stress release during the heat treatment process, the original geometric dimensions of the product Therefore, after heat treatment, it is necessary to measure the outer diameter, roundness and other geometric dimensions of the gas cylinder in accordance with the requirements of the product manufacturing drawi...

AI Technical Summary

Problems solved by technology

Other few non-universal detection technologies can basically be divided into two types of forms: laser measurement and mechanical measurement; among them, the device for measuring workpiece roundness by laser method is relatively complicated, such as the "portable non-contact roundness measurement" disclosed in CN104567714A "Instrument" not only needs to be equipped with a laser tube on the shell, but also needs to embed a liquid crystal screen and a fixed CCD on both sides, and a DSP image processor needs to be installed inside the shell, which is not only expensive, but also requires personnel to have strong electronic components. Knowledge, more suitable for non-contact sites, not convenient for quick measurement at gas cylinder production sites

The device for measuring the roundness of workpieces by mechanical methods has the following problems: first, the size of such devices matched with large-diameter workpieces is very large, takes up a lot of production site space, and increases the number of times of hoisting, which increases the risk, as disclosed in CN104567624A During the measurement process, the round pipe needs to be hoisted to the support frame of the device, and then rotated for detection after locking. It is difficult to rotate a large-sized round pipe, and it is inconvenient to hoist up and down. The operation is cumbersome and there is a risk of frequent hoisting ; the second, can't record actual value, can only judge qualified or not, as CN202188833U discloses " steel pipe roundness measuring instrument ", sensor rotates around steel pipe 360 ​​° in the measurement process, when steel pipe does not meet requirements, grating ruler displacement display Automatic red alarm, green light is displayed if qualified; third, the actual operation is more difficult to realize, such as the "roundness measuring instrument and its measuring method" disclosed in CN103542830A, the pipe fittings are placed vertically during the measurement process, which cannot be realized for larger pipe fittings; However, CN201780083U discloses "a measuring tool for measuring the extreme value and ellipticity of steel pipe diameter". During the measurement process, the measuring device needs to be manually rotated 360 degrees along the outer wall of the pipe fitting. The actual placement restricts the 360-degree rotation of the measuring device is not easy to achieve

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