Rigid fixture suitable for ultrasonic guided wave detection of various pipe diameters and using method

Abstract

The invention discloses a rigid clamp for ultrasonic guided wave testing of various pipe diameters. The rigid clamp comprises an annular groove body, a plurality of sets of probes are uniformly distributed on an inner hole of the annular groove body through corresponding probe locating devices, and a probe floating supporting device is arranged between the probe locating devices and the inner sides of half-round groove bodies. Lemo connectors of the probes are fixedly connected to Lemo connector bases fixed to end plates of one ends of the half-round groove bodies through connection cables. A use method of the rigid clamp includes the steps of 1, adjusting the elastic force of compressed springs; 2, rotating a radial position adjusting sleeve of each probe to attach the probes to pipelines at zero pressure; and 3, fixedly connecting the two half-round groove bodies into a whole. According to the rigid clamp and the use method, the pressing force of the probes on the tested pipelines can be maintained within an appropriate range, large contact areas between the probes and the tested pipelines can be guaranteed, moderate attaching pressure can be maintained, and therefore the coupling property can be guaranteed, and testing requirements of the pipelines with different pipe diameters can be met. The working reliability of the probes is improved.

Description

technical field [0001] The invention relates to a special fixture for nondestructive testing of pipelines, in particular to a pipeline fixture for detecting defects of industrial pipelines of various specifications by using ultrasonic guided waves, and also relates to a method for using the pipeline fixture, which belongs to the technical field of nondestructive testing. technical background [0002] Pipeline transportation of fluids plays an irreplaceable role in petroleum, chemical industry, natural gas, urban water supply, etc. However, after long-term use of pipelines, pipeline leakage occurs from time to time due to wear, corrosion or accidental damage, which damages the property and interests of the country and the people. Safety brings great harm. In order to reduce or even avoid the occurrence of such hazards, industrial pipeline safety inspection is particularly important. [0003] At present, the conventional methods for non-destructive testing of pipelines mainly ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem of poor applicability of existing rigid fixtures, and to provide a rigid fixture with a wide range of application and applicable to ultrasonic guided wave detection of various pipe diameters and its use method

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