On-line monitoring device for diameter and roundness of expanded pipeline

Abstract

The invention relates to an on-line monitoring device for the diameter and roundness of an expanded pipeline. The device comprises a base, a base frame, a computer, a pipeline diameter measuring assembly and a pipeline roundness measuring assembly. A plurality of lifting stand columns are evenly distributed at the bottom of the base, and the height of the base is adjusted through stretching of thelifting stand columns. The base frame employs a rectangular frame type structure and is vertically and fixedly installed on the base. The computer, the pipeline diameter measuring assembly and the pipeline roundness measuring assembly are all installed on the base frame. The computer is provided with a touch panel, and a human-computer interaction interface is displayed on the touch panel. The pipeline diameter measuring assembly comprises two flexible rulers, two flexible ruler tightening mechanisms and two fixed-length photographing mechanisms. The pipeline roundness measuring assembly comprises four sets of laser ranging mechanisms. The online measuring device can meet online measurement of the diameter and roundness of the pipeline at the same time, has the advantages of being high inmeasuring precision, high in measuring speed and high in measuring efficiency, can adapt to pipelines with different diameter ranges, is slightly affected by the production environment, and has highportability on the whole.

Description

technical field [0001] The invention belongs to the technical field of pipeline measurement, in particular to an on-line monitoring device for diameter and roundness of expanded pipelines. Background technique [0002] In the process of production, processing and expansion of steel pipes such as deep-sea oil and gas pipelines, petrochemical / city gas / construction projects, it is necessary to detect and analyze the diameter and roundness of the pipeline at any time, so as to adjust the production process in time, so as to ensure the diameter of the expanded pipeline. The dimensions and roundness are in line with production standards. [0003] At present, manual measuring tools such as calipers, micrometers, tapes, and circumference rulers are generally used to directly measure the diameter of expanded pipes. It has the disadvantages of low measurement accuracy, slow measurement speed, low measurement efficiency, and high labor intensity for workers, and it cannot fully reflec...

AI Technical Summary

Problems solved by technology

[0003] At present, manual measuring tools such as calipers, micrometers, tapes, and circumference rulers are generally used to directly measure the diameter of expanded pipes. The shortcomings of low measurement accuracy, slow measurement speed, low measurement efficiency, and high labor intensity of workers, and cannot fully reflect the outer diameter of the entire large pipeline

In addition to the above-mentioned traditional measurement methods, a large-diameter caliper can also be used to measure the diameter of the expanded pipe. The large-diameter caliper can adapt to pipes with different diameter ranges, and the detection accuracy is high. It is bulky, and there can be no obstructions during the detection process, so it is greatly affected by the production environment, and for multi-position sampling of the pipeline, the bulky size will greatly restrict the timeliness of movement

[0004] For the measurement of pipe roundness, contact roundness meters and non-contact roundness meters are mainly used at present, but whether it is a contact roundness meter or a non-contact roundness meter, in the process of measuring the roundness of a pipe Relative rotational movement is required, which greatly limits the measurement speed and makes it difficult to achieve online real-time measurement

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