PROBE FIXTURE AND GUIDING MECHANISM FOR MEASURING THICKNESS OF RIB PROTION OF COPPER STAVES IN BLAST FURNACE BY ULTRASONIC TESTING TECHNIQUES AND A METHOD FOR THE SAME

摘要

The present invention relates to a method of measurement of thickness of copper staves (20) used in a blast furnace by special probe fixture (10) and guiding mechanism (G). The system works by transmitter - receiver method of sound wave technique. A probe fixture (10) is arranged with predetermined length that can reach the wall of cooling channel (40) and which can be handled from outside. An ultrasonic probe (30) seats properly on the probe such that no air film between probe (10) and the surface of the cooling channel (40) exists. The probe has curvature as that of the cooling channel of copper stave (20). Transmitter - Receiver mode having two crystals of sensing unit acoustically and electrically separated from each other in the same probe housing. A guide block with "V" groove is disposed to restrict the movement of the probe fixture (10) in circumferential direction wherein ultrasonic based thickness measurement is carried out deploying a ultrasonic flaw detector (50).