Automated ultrasonic examination system for heat transfer...

Details Automated ultrasonic examination system for heat transfer... Automated ultrasonic examination system for heat transfer...

G - Physics

01

N

349/35

G01N 29/00 (2006.01) F22B 37/00 (2006.01) F28G 15/00 (2006.01) G01N 29/265 (2006.01) G01N 29/28 (2006.01)

Patent

CA 1282488

Abstract of the Disclosure A novel automated ultrasonic examination system for heat transfer tubes in a boiler is disclosed herein, which makes it possible to perform ultrasonic examination from the inside of the heat transfer tubes without neces- sitating removal of scale from the outer surfaces of the boiler tubes by polishing nor necessitating measurements in restricted places where manual measurements are dif- ficult or impossible. The disclosed novel system comprises an insert tube adapted to be inserted into a cylindrical header to which one ends of the heat transfer tubes are connected, an insert tube moving device for moving the insert tube in the axial direction of the header and revolving it about its own axis, an ejection nozzle pro- vided on the insert tube, a water pump for feeding pres- surized water to the ejection nozzle, a cable adapted to be inserted from the ejection nozzle into the heat transfer tube as passed through the insert tube by the pressurized water fed from the water pump, a cable accommodation tank for accommodating the cable, a revolving submerged ultrasonic probe mounted at the tip end of the cable, and an ultrasonic examination unit for processing signals sent from the probe and displaying the results of examination. Preferably, means for detecting a length of the cable inserted into the heat transfer tube, is provided in the automated ultrasonic examination system.

557683

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