Diameter expanding pipeline diameter and roundness detection device based on distributed optical fiber sensing

Abstract

The invention discloses an expanded pipeline diameter and roundness detection device based on distributed optical fiber sensing. The expanded pipeline diameter and roundness detection device comprises a rack, a lifting base installed at the bottom of the rack, a detection device installed in the rack and a detected pipeline arranged in the rack. The detection device comprises a driving screw rod module mechanism, a driven screw rod module mechanism, a transmission mechanism, a first optical fiber line transmit-receive mechanism and a second optical fiber line transmit-receive mechanism. The driving screw rod module mechanism and the driven screw rod module mechanism are respectively mounted at the top and the bottom of the rack; the transmission mechanism is in transmission connection with the driving lead screw module mechanism and the driven lead screw module mechanism. According to the invention, the real-time measurement of the diameter and the roundness in the pipeline expanding process is realized, and the device is suitable for expanding pipelines with different specifications and diameters, has the characteristics of high efficiency, high precision, no need of manpower and wide application range, and is not influenced by environmental factors.

Description

technical field [0001] The invention relates to the technical field of pipe diameter and roundness detection, in particular to a diameter and roundness detection device for expanding pipes based on distributed optical fiber sensing. Background technique [0002] With the development of industry, for petroleum and chemical industries, the demand for large-diameter seamless steel pipes is increasing day by day, and its main production technology is pipe diameter expansion technology. In order to meet the technical requirements of the required pipeline, it is necessary to measure the diameter and roundness of the pipeline in real time during the expansion process of the pipeline. [0003] At present, the commonly used methods for measuring the diameter of expanded pipes are: caliper measurement method, surrounding measurement method, theodolite measurement method and roller method. However, the above-mentioned traditional methods for measuring the diameter of expanded pipes ha...

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Problems solved by technology

However, for the measurement of roundness, it takes too long for the laser rangefinder to move, and the color of the outer wall of the pipe and the surrounding ambient light will affect the effect of laser reflection, which has high requirements on the measured object and the environment, so it is not applicable In all channels and occasions

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