H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 7/18 (2006.01) B25J 5/00 (2006.01) F16L 55/28 (2006.01) G01M 3/00 (2006.01) G03B 29/00 (2006.01)
Patent
CA 2076305
The internal structure of an apparatus with internal passages such as a steam turbine is inspected without dismantling by inserting a compact robotic carriage device into a steam pipe and remotely controlling the carriage to carry a video probe to a restricted passage such as a nozzle block and to extend the probe relative to the carriage to inspect features within the restricted passage such as turbine blades. Separate motor drives for each side of the carriage include drive wheels of slightly greater diameter than a timing belt which serves as a tractor tread to drive the carriage over obstacles not bridged by the wheels. A large permanent magnet between the wheels is retained within the carriage by front and rear axles and secures the carriage to the pipe walls in all orientations. The fixed size of the device is minimized by housing a motor for extending the probe relative to the carriage in a module cantilevered from the carriage by a preloaded compression spring. The single plane of articulation of the video probe is rotated by a torsion cable connected to the probe lead just behind the carriage.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Siemens Energy Inc.
Westinghouse Electric Corporation
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