Transverse wave focusing and flushing ultrasonic probe

Abstract

The invention discloses a transverse wave focusing and flushing ultrasonic probe which comprises a probe shell and a probe core, wherein the probe core is inserted into an inner cavity of the probe shell from an inclined hole of the top end of the probe shell; an included angle is formed between the axial direction of the inclined hole and the vertical direction; a water cavity isolation bracket is arranged in the inner cavity of the probe shell; the water cavity isolation bracket is sleeved on the excircle of the probe core; the inner cavity of the probe shell is divided into an upper water cavity and a lower water cavity through the water cavity isolation bracket; the upper water cavity and the lower water cavity are communicated through a water leakage hole in the water cavity isolation bracket; a spherical concave mirror is adhered to a piezoelectric crystal plate at the front end of the probe core. The transverse wave focusing and flushing ultrasonic probe is simple and practical, imported products are replaced, the production cost is reduced, the safety production is guaranteed, a gap in the aspect of national large-area plate transverse wave flushing flaw detection is filled, the problems of high-strength manual operation, low efficiency, detection leakage caused by poor contact and the like are solved, a safety guarantee means is increased for construction of the national large / ultra-large equipment and facilities, and the social benefits and the economic benefits are greatly improved.

Description

technical field [0001] The invention relates to a transverse wave focused flushing ultrasonic probe. Background technique [0002] For ultrasonic flaw detection of large-area sheet metal, the method of flushing flaw detection with longitudinal wave straight probe is usually used to detect internal defects parallel to the surface of the plate, while for defects not parallel to the surface of the plate, only the direct contact method of ordinary angled probes can be used. For detection, this method not only wears out the probe, but more importantly, it is too labor-intensive and the efficiency is extremely low. In addition, the high roughness of the plate surface causes poor coupling, which increases the possibility of missed detection. Because the design, manufacture and experiment of the shear wave flushing probe are relatively difficult, there is no shear wave focusing flushing probe that can be used in practice. In addition, flushing ultrasonic probes are most suitable fo...

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Problems solved by technology

[0002] For ultrasonic flaw detection of large-area sheet metal, the longitudinal wave straight probe water flushing flaw detection method is usually used to detect internal defects parallel to the surface of the plate, and for defects not parallel to the surface of the plate, only the direct contact method of ordinary angled probes can be used. Detection, this method not only wears out the probe, but more importantly, it is too labor-intensive and the efficiency is extremely low. In addition, the high roughness of the surface of the plate causes poor coupling, which increases the possibility of missing detection.

Due to the difficulty in designing, manufacturing and experimenting the shear wave flushing probe, there is no shear wave focused flushing probe that can be used in practice.

In addition, flushing ultrasonic probes are most suitable for large-area, long-term, rough surfaces, etc., but the air bubbles from tap water are easily attached to the acoustic emission surface of the probe core, causing the ultrasonic energy to be greatly lost and divergent, and the echo signal It is extremely unstable or even disappears. For this reason, some places use still water in the water storage irrigation, some use a small amount of water to slow down the work progress to reduce the degree of bubble adhesion, and some use imported expensive and complicated probes with anti-bubble devices. , but none of these are optimal solutions to the problem

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