JPS5563705A - Measuring device for pipe thickness - Google Patents

Abstract

PURPOSE: To obtain the information of the quality control of a thickness deflection rate, etc. in an on-line shape, by measuring the thickness of pipes in non-contact shapes by mounting a head driving mechanism and a lifting mechanism of a measuring frame, which disposes and supports an ultrasonic-wave measuring head in a water jet nozzle system, to the measuring frame.

CONSTITUTION: The nominal dimensions of a pipe to be measured are beforehand input to a control portion of a different diameter pipe detector B prior to the conveyance of the pipe. The center of a measuring frame 50 is conformed to the center of the pipe by controlling a driving mechanism 56 of an ultrasonic-wave measuring head 54 of a pipe thickness measuring device D and a lifting mechanism 58 of the measuring frame 50, and the measuring head 54 is set. When pipes are carried in by means of a conveyor A, and speed is gained by means of a pipe speed detector C by means of a V roller, timing pulses are put out every 10mm pipe axial length. After water column from a water column head of the measuring head 54 is stabilized, the thickness of the pipe is measured by means of an ultrasonic-wave measuring device every 10mm pipe axial length. The value is operated at an operation portion, and the pipe thickness maximum value, the minimum value, mean pipe thickness and a thickness deflection rate are successively acquired every section.

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