Electricity: measuring and testing – Magnetic – Magnetic sensor within material
Patent
1981-04-01
1984-04-10
Strecker, Gerard R.
Electricity: measuring and testing
Magnetic
Magnetic sensor within material
324226, 324262, G01N 2772, G01N 2782, G01R 3312
Patent
active
044424035
ABSTRACT:
A testing installation for pipes and rod material to determine surface defects and/or core defects, comprises a plurality of test zones (1, 2) having a rotary roller track (3) for rotatingly driving the pipe (4) to be tested. An internal testing unit (7) is movable lengthwise of the pipe, within the pipe; and parking stations (9, 10) adjustable to the pipe length are provided at both ends of the testing zone for accommodating the internal testing unit during pipe change. An external testing unit (12) is movable along the outer pipe wall (11), and conveying devices (16) for the introduction and removal of the pipes into and from the testing zones are provided. The internal testing unit (7) is a cylindrical housing (21) having built-in contactless testing devices (22) and arranged on a running gear frame (23) with a forward running gear and a rearward running gear (24, 25). These running gears comprise a drive shaft (26) and two supporting rollers (27, 28) assuming a driving position (26' , 27', 28') obliquely to the longitudinal axis of the pipe to be tested and travelling on the inner pipe wall and being driven by the revolving motion of the pipe to be tested.
REFERENCES:
patent: 3535623 (1970-10-01), Wood et al.
patent: 4217548 (1980-08-01), Furukawa et al.
patent: 4247819 (1981-01-01), Shimada et al.
Snow Walter E.
Strecker Gerard R.
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