Ultrasonic detection device and method for multi-layered composite interface of metal pipe fitting

Abstract

The invention discloses an ultrasonic detection device and method for a multi-layered composite interface of a metal pipe fitting. The ultrasonic detection device comprises a scanning synchronizer, a mechanical movement scanning system, an ultrasonic signal transmitting and acquiring system, a computer system, coupling balancing devices and a pipe fitting fixed rotating device, wherein the pipe fitting fixed rotating device is used for fixing and rotating the metal pipe fitting to enable an end opening of one end of the metal pipe fitting to be upward perpendicularly; the coupling balancing devices are used for injecting a liquid coupling agent for ultrasonic detection in the metal pipe fitting; and the coupling balancing devices are respectively mounted at two ends of the metal pipe fitting. The ultrasonic detection method comprises the following steps: preparation and detection. According to the technical scheme, the problems that scanning is not complete and the coupling effect is poor during ultrasonic detection are solved. The ultrasonic detection device and method have the advantages of high reliability, high operability, high detection efficiency and the like.

Description

technical field [0001] The invention belongs to the field of non-destructive testing, and in particular relates to an ultrasonic testing device and an ultrasonic testing method for a multilayer composite interface of a metal pipe fitting. Background technique [0002] In the superconducting tokamak controllable thermonuclear fusion device, a large number of metal tubes with multilayer composite interfaces are used to cool the plasma generated in the device and remove heat. Defects such as poor welding or debonding of the multilayer composite interface of the metal pipe directly affect the heat exchange capacity of the metal pipe, which may cause abnormal thermal stress and seriously affect the structural integrity and overall safety of the tokamak device. [0003] At present, for metal pipe fittings with multi-layer composite interfaces, the conventional detection methods mainly include: ray detection method, eddy current detection method and ultrasonic detection method. Ra...

AI Technical Summary

Problems solved by technology

[0005] (1) When the local curvature of the pipe fitting is large, the large change in the direction angle of the tangent line of curvature leads to the use of flexible pipes such as resin pipes as the synchronous transmission member of the transducer movement, no matter whether axial scanning or circumferential rotating scanning is used According to the inspection method, one end of the longer flexible pipe cannot transmit enough torsion force to the other end of the flexible pipe (that is, the probe end) under the drive of the driving device. It cannot guarantee the consistency of the rotation distance of the probe end and the mechanical control system, and the pipe fitting interface cannot be achieved. 100% coverage scanning and real-time imaging results correspond to the actual scanning position

[0006] (2) When the pipe fittings are long, the conventional liquid immersion method is used to immerse the pipe fittings in the liquid couplant as a detection method, which requires a large tank to accommodate the pipe fittings; at the same time, in order to fix the long pipe fittings and realize the removal and placement of the pipe fittings, it is also necessary to Equipped with complex fixed clamping device and pipe lifting device, the operation and implementation process is complicated and the detection efficiency is low

[0007] (3) When the diameter of the pipe fittings of the long pipe is small, it is difficult to achieve 100% liquid immersion coupling in the long pipe

Images