Insert type ultrasonic crack hunting apparatus

Details Insert type ultrasonic crack hunting apparatus Insert type ultrasonic crack hunting apparatus

1988-10-20

1990-05-01

Williams, Hezron E.

Measuring and testing

Vibration

By mechanical waves

G01N 2904

Patent

active

049208047

ABSTRACT:
An improved insert type supersonic crack hunting apparatus is capable of discovering cracks in a boiler steel tube from inside the tube. A crack hunting section provided with a probe, a slip ring for transmitting an ultrasonic signal issued from the probe, a rotary use motor for rotary the crack hunting section and an axial feed motor for moving the crack hunting section in an axial direction are connected in sequence. An axial feed nut for converting rotation of the axial feed motor into movement in the axial direction is disposed between the rotary use motor and the axial feed motor. In addition, there is provided a coupling section, in which a front end of a flexible shaft connected to the axial feed motor is coupled to a rear end of a shaft connected to the axial feed nut. An axial feed shaft thrust bearing for supporting the coupling section is disposed between the axial feed nut and the axial feed motor. Preferably, a geared shaft at the front end of the shaft having its rear end coupled to the flexible shaft connected to the axial feed motor, is threadedly inserted into the axial feed nut.

REFERENCES:
patent: 3845463 (1974-10-01), Timbs
patent: 4096757 (1978-06-01), Ishii et al.
patent: 4160385 (1979-07-01), Gromlich et al.
patent: 4663727 (1987-05-01), Saporito et al.

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