An On-Line Monitoring Device for Flange Leakage Based on Ultrasonic Sounder

Abstract

The invention discloses a flange leakage on-line monitoring device based on ultrasonic acoustical generators. A flange joint is formed by a pair of flange plates form a detachable connection by beingfastened through bolts, and the flange platesealing surfacesare sealed by gaskets; ultrasonic acoustical generator supports are of a 1 / 4 fan ring structure, and are installed on the outer circles of the flange plates through bolt connection, the four groups of ultrasonic acoustical generator supports are evenly distributed along the outer circles of the flangeplates, and the number of the ultrasonic acoustical generators is determined by the diameter of the flangeplates; the ultrasonic acoustical generators are of a cylindrical cavity soundingstructure, oblique cutting openings are formed in air inlet holes of the ultrasonic acoustical generators, and the openings are formednear the flange sealing surface end; at least four groups of narrow-band ultrasonic transducers are installed in thedirectly front of the oblique cutting openings of the ultrasonic acoustical generators, and a signal processing module is connected with the output ends of the ultrasonic transducers. According to theflange leakage on-line monitoring device based on the ultrasonic acoustical generators, small leakage with the leakage flow lower limit being 1.0L / min can be subjected to intelligent monitoring alarmand leakage location, the flange leakage failure is controlled at the early stage, and the economic loss and the potential safety hidden hazard caused by a great deal of leakage are avoided.

Description

technical field [0001] The invention relates to the technical field of air tightness testing of structural components, in particular to an online flange leakage monitoring device based on an ultrasonic sounder. Background technique [0002] Flange connection or flange joint is the most common and ultimate connection form for pipelines, pipe fittings, valves, instruments, equipment, etc. to realize their own and interconnection. The three are connected to each other as a detachable connection of a group of combined sealing structures. The operating conditions of flanged joints are very complex. Under operating conditions, flanged joints need to bear the loads such as bolt preload, medium pressure, temperature, and accessory bending moment and additional axial force generated by the piping system. The gasket is the core component to realize the flange sealing, and the gasket sealing requires sufficient bolt pre-tightening force to ensure sufficient friction between the flange...

AI Technical Summary

Problems solved by technology

[0008] To sum up, although the leakage detection methods involved in the above several technical solutions can theoretically detect flange leakage, their own technical deficiencies limit the conditions of use and scope of application to a certain extent.

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