Device for testing relationship between tightening torque and angular displacement of pipe joint

Abstract

The invention discloses a device for testing the relationship between the tightening torque and the angular displacement of a pipe joint, and relates to the technical field of pipelines. The device comprises a data acquisition device, a clamping transmission assembly, a power assembly and an angular displacement measuring assembly which are respectively connected with two ends of the clamping transmission assembly. The power assembly and the angular displacement measuring assembly are in communication connection with the data acquisition device. The clamping transmission assembly comprises a clamping assembly body and a transmission assembly body. The clamping assembly body comprises a first rack and a supporting frame arranged on the first rack in a sliding and lockable mode. The transmission assembly comprises a connecting rod, a connecting seat, a conical rubber ring, a spring and a spring seat. The testing device can liberate manpower, synchronously acquire accurate data of torqueand angular displacement and ensure reliable transmission.

Description

Technical field [0001] The invention relates to the technical field of pipelines, in particular to a testing device for the relationship between the tightening torque and angular displacement of a pipe joint. Background technique [0002] Pipelines are widely used in machinery, construction, aviation, energy and other industries, mainly for the transportation of oil and gas, so the sealing performance of the pipeline is particularly important. When tightening pipe joints, no matter what method of preload control is adopted, more accurate data of torque and angular displacement are required to determine the point of torque surge and torque stability, and finally form a manual that can guide frontline operators. Therefore, Develop a device for accurately measuring the tightening torque and angular displacement of pipe joints to study the torque-angular displacement relationship when pipe joints are tightened, which can provide important test basis for the sealing performance of pip...

AI Technical Summary

Problems solved by technology

[0003] When existing scientific research institutes and enterprises obtain the torque and rotation angle data of pipe joints, most of them obtain them separately through simple devices, and their accuracy is relatively low

Especially when determining the torque surge point, rely on the hand feeling when tightening. When the tightening resistance becomes larger, record the angular displacement at the moment, and summarize the torque surge point through multiple sets of data; when it is necessary to tighten to a larger stable torque , because the operator is not strong enough to use an extension rod, it is troublesome to operate; and when obtaining the tightening angle, it is usually obtained through a mechanical device such as a dial

This greatly depends on the technical level of the operator, and the data obtained are scattered and not accurate enough

This makes the conclusion of the study not instructive for first-line operation

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