Water spraying coupling laminar flow generation nozzle for ultrasonic C scanning

Abstract

The invention relates to the technical field of ultrasonic nondestructive testing, in particular to a water spraying coupling laminar flow generating nozzle for ultrasonic C scanning. The nozzle comprises a spray head, a laminar flow generation assembly is arranged in the spray head, the laminar flow generation assembly can change passing water flow into a laminar flow state, one end of a middle pipe tightly presses the laminar flow generation assembly in the spray head, a flow stabilizer is arranged in the middle pipe, and the flow stabilizer can change the water flow into relatively smooth and stable flow from turbulent flow. The rear cover tightly presses the flow stabilizer in the middle pipe; and a plurality of front-back through water inlets are formed in the rear cover, a water outlet is formed in the center of the water outlet end of the spray head, and the water inlets and the water outlet face the same direction. The water inlet and the water outlet face the same direction, and the water inlet and the water outlet are arranged in the same direction, so that the turbulent flow phenomenon can be reduced, the stability of a water column sprayed by the spray head is guaranteed, and the water column is in a laminar flow state.

Description

technical field [0001] The invention relates to the technical field of ultrasonic non-destructive testing, in particular to a water spray coupled laminar flow generating nozzle for ultrasonic C-scanning. Background technique [0002] Ultrasonic C-scan is a common nondestructive testing method for complex components, and water spray coupling is the most commonly used coupling method for ultrasonic nondestructive testing. It is suitable for nondestructive testing of large and complex components and can detect various defects in large and complex components. Ultrasonic testing requires coupling methods such as water spray coupling or water immersion coupling, using coupling fluids such as water or oil to transmit sound waves between the probe and the workpiece to be tested. In order to improve the accuracy of ultrasonic C-scan detection, the coupling method of ultrasonic C-scan and the selection of coupling liquid have been studied in the early stage. Because large and complex ...

AI Technical Summary

Problems solved by technology

[0005] In the prior art, the water inlet and outlet of the ultrasonic non-destructive testing nozzle are generally set in different directions, resulting in turbulent flow and air bubbles in the water flow process, which affects the laminar flow state

At the same time, the utilization rate of the laminar flow generation part is low, and the laminar flow generation structure cannot guarantee the stable generation of the laminar flow state of the water flow, which affects the accuracy of the ultrasonic C-scan non-destructive testing results

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