Pipeline contourgraph and scribing instrument

Abstract

The present invention discloses a pipeline contourgraph. The pipeline contourgraph is used for measuring the outer contour of a pipe 13 to be measured. The pipeline contourgraph comprises a guide rail 1, a fixed bracket 8 and a first sliding bracket 3; the first sliding bracket 3 is arranged on the guide rail 1; two identical circular groove openings are formed at the top ends of the fixed bracket 8 and the first sliding bracket 3 respectively; one rotation shaft of which the diameter is matched with the corresponding circular groove opening is arranged in each of the two identical circular groove openings; positioning pushing cones are fixed onto the inner sides of the two rotation shafts; the outer sides of the two rotation shafts are fixedly connected with two rotating discs respectively used for rotating the pipe to be measured; an angle rotating disc is arranged around the circular groove opening of the fixed bracket 8 or the first sliding bracket 3; an angle pointer is located on the rotation shaft so as to determine the rotation angle of the pipeline; a displacement dial plate 5 of a depth gauge is arranged on one slide channel of the guide rail 1; and the displacement probe 4 of the depth gauge points to the pipe 13 to be measured and is located at the same horizontal plane with the axis of the pipe 13 to be measured. The present invention also provides a pipeline scribing instrument.

Description

technical field [0001] The invention relates to a pipeline dimension (contour) parameter acquisition device, which can measure the initial contour of a sound pipeline, use the measurement results to calculate the buckling resistance of the pipeline structure, and can also measure the pipeline with local corrosion damage Corrosion characteristic parameters (corrosion depth, width, length), and then calculate the corrosion rate. In addition, as needed, the depth gauge can be replaced with a marking pen to easily mark the axial and circumferential directions of the pipe fittings, and it is used for pasting and positioning of laboratory pipe fitting strain gauges. Background technique [0002] Pipelines play an important role in deep-sea oil and gas transportation. The geometric defects of the initial out-of-roundness of the pipeline will seriously affect its ability to resist external pressure. Therefore, it is of great significance to invent a device that can accurately measur...

AI Technical Summary

Problems solved by technology

[0003] 1. Although the above equipment can measure the outer contour size of the pipeline, it can only measure the parameters of limited positions, and the operation is inconvenient, such as CN 203629528U, CN 103954262A

[0004] 2. None of these measuring devices can realize continuous monitoring of deformation at different positions in the circumferential and axial directions

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