Automatic measuring device for circumference of spiral submerged-arc welding pipe

Abstract

The invention discloses an automatic measuring device for the circumference of a spiral submerged-arc welding pipe, and relates to the technical field of the measuring device for the length of a pipe body. The automatic measuring device is characterized in that the left side and the right side of an upper fixed beam and a lower fixed beam of a fixed frame are respectively provided with a linear guide rail; an upper CCD (Charge Coupled Device) laser micrometer is fixed between the two linear guide rails of the upper fixed beam by the fixed bracket or a telescopic fixed bracket; a lower CCD laser micrometer is fixed between the two linear guide rails of the lower fixed beam by the fixed bracket or the telescopic fixed bracket; and the two ends of a ball screw are respectively matched with the linear guide rails in a sliding manner by sliding blocks. The automatic measuring device disclosed by the invention has the advantages that since the four CCD laser micrometers are used and the distance among the CCD laser micrometers is adjustable, real-time online automatic measurement of the circumferences of the welding pipes with different welding pipes can be realized, and the detection leaking rate is avoided; due to the design of automatic measurement and redundancy algorithm, the accuracy of the measured value is improved and the measuring accuracy can reach 0.01mm.

Description

technical field [0001] The invention relates to the technical field of pipe body length measuring devices, in particular to an automatic measuring device for the circumference of a spiral submerged arc welded pipe. Background technique [0002] In the production process of spiral submerged arc welded pipes, both the API Spec 5L standard and the GB / T9711.1-1997 standard stipulate that for steel pipes of different specifications, their diameters have a strict deviation range, and the steel pipes will be rejected if they exceed the deviation range. . In the online continuous production process, the measurement of the diameter is not easy to achieve. Usually, under the condition of ensuring the ellipticity, the diameter of the steel pipe is checked whether it meets the process requirements by measuring the circumference. At present, most of the manufacturers of spiral submerged arc welded pipes in China still use the method of manual measurement of steel tape to measure the cir...

AI Technical Summary

Problems solved by technology

The company has equipped corresponding personnel to measure the circumference of the steel pipe online and periodically check the measuring tools. While increasing the production cost, it still cannot meet the production requirements. The specific problems are as follows: (1) Manual measurement, the accuracy is affected by man-made The influence of the larger, resulting in a larger measurement error

(2) Manual measurement cannot achieve real-time measurement, and there is a possibility of missed detection

(3) Manual measurement, because the welding temperature of the steel pipe is too high, it is easy to burn, which is unsafe

(4) Manual measurement, frequent measurements, high labor intensity of workers, and harsh working environment

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