Electricity: measuring and testing – Magnetic – Magnetic sensor within material
Patent
1989-08-16
1991-06-18
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
Magnetic sensor within material
73623, 738665, 165 112, 324226, 376245, 414590, G01N 2782, G01N 2906, G21C 17017
Patent
active
050252151
ABSTRACT:
A system for helically driving an inspection probe within a tube of a nuclear steam generator is provided, wherein the system is particularly useful in driving a combination eddy-current and ultrasonic probe. The system generally includes a head assembly insertable with the tube for inspection, a drive frame assembly to be located external of the steam generator, and a conduit system connecting the head assembly and drive frame assembly. Particularly, the head assembly includes a portion fixable to the tube by a pressure bladder and a movable portion helically movable with a probe to the fixable portion. The drive motor and electrical pick-up are slidably movable on the drive frame assembly to move linearly with the probe during inspection so as not to limit the stroke of the probe, wherein the drive motor and pick-up are connected with the head assembly by way of two flexible coaxial conduits. The two conduits further provide two fluid flow paths to supply fluid to the bladder and couplant fluid for use during ultrasonic testing.
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Strecker Gerard R.
Westinghouse Electric Corp.
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