Measuring device for threaded fasteners of oil pipe joints

Abstract

The invention belongs to the oil pipe joint performance testing field and discloses a measuring device for threaded fasteners of oil pipe joints. The measuring device comprises a torque application mechanism, an external screw thread component of an oil pipe joint, a conversion connector, and a force conduction and detection mechanism; the external threaded component of the oil pipe joint is coaxially connected with the output end of the torque applying mechanism; the conversion connector is matched with the external threaded component and includes an internal screw thread portion and a conical surface portion which are separated from each other; the force conduction detection mechanism is connected with the conversion connector; the force conduction and detection mechanism is used for conducting and detecting a pre-tightening force and a friction torque which are applied to the conical surface portion by the external screw thread component during a tightening process; an oil pipe is arranged in the external screw thread component; one end of the oil pipe is connected with the external screw thread component through the torque application mechanism, and the other end of the oil pipe is connected with a pipe torque detection mechanism; the pipe torque detection mechanism is used for detecting a pipe torque introduced into the oil pipe during the tightening process; and the forceconduction and detection mechanism, the pipe torque detection mechanism and the output end of the torque application mechanism are coaxially arranged. The device of the invention has the advantages of compact structure, simple operation, easiness in popularization and popularization.

Description

technical field [0001] The invention relates to the field of performance testing of oil pipe joints, in particular to a measuring device for threaded fasteners of oil pipe joints. Background technique [0002] The most widely used threaded fastener connection system is the form of bolt-nut connection pair, most of which are used under the action of pre-tightening force. The connection under pre-tightening force can improve the reliability of bolt connection and enhance the tightness of the connected body and stiffness. In the threaded fastener connection system, when there is no pretightening force or the pretightening force is not enough, the real connection effect cannot be achieved, which is generally called undertightening; but too high pretightening force or overtightening can also lead to threaded connection s failure. [0003] For threaded fasteners with special structures such as oil pipe joints, such as oil pipe joints in brake pipes, according to the German Conce...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a measuring device for threaded fasteners of oil pipe joints, which solves the problems that the existing measuring equipment mainly relies on imports, long cycle, inconvenient maintenance and low measurement accuracy.

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