Steel pipe roundness measuring instrument

Abstract

The invention relates to a steel pipe roundness measuring instrument, comprising a rack, displacement sensors and a data collection and disposal system, wherein the displacement sensors are electrically connected with the data collection and disposal system. The steel pipe roundness measuring instrument is characterized in that a plurality of scored pulleys and a power mechanism are arranged on the rack, wherein a reference round ring is arranged on the rack, and is supported by the plurality of scored pulleys in a sliding manner; the output of the power mechanism is in transmission connection with the reference round ring; a plurality of telescopic booms pointing to the circle center are arranged on the equal diversion points of the circumference of the reference round ring; one displacement sensor is arranged at the end part of one end, which points to the circle center, of each telescopic boom; the plurality of telescopic booms are driven by a synchronizing mechanism; the plurality of displacement sensors are always kept on the same circumference; and the power mechanism and the synchronizing mechanism are controlled by the data collection and disposal system. The steel pipe roundness measuring instrument has the characteristics of being reasonable in design and simple in structure, and is capable of achieving the noncontact on-line measurement.

Description

Technical field: [0001] The invention belongs to the technical field, and in particular relates to a roundness measuring instrument for steel pipes, in particular, it can sample multiple points on the outer surface of steel pipes to measure the circumference, diameter, roundness error, misalignment and other forming parameters. Background technique: [0002] Steel pipes are widely used in oil and gas transportation. In order to ensure the geometric quality of steel pipe forming, geometric parameters such as steel pipe outer diameter allowable deviation, roundness allowable error (or out of roundness) and other geometric parameters have been formulated. At present, most domestic steel pipe manufacturers use tools such as measuring tapes or calipers to manually measure the circumference or diameter of the steel pipe section, which not only has a slow measurement speed, but also has principle errors. The online measurement of steel pipe forming by light curtain method cannot me...

AI Technical Summary

Problems solved by technology

[0005] The above two publicly available measuring devices are all static structures, and the workpiece must be rotated and matched, which is difficult to meet the requirements of online steel pipe measurement.

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