Konecranes Global Corporation

Joni Silvo

Jack Hoover

Mats Åkesson

Matti Pekkarinen

Matti Kumpulainen

Jyrki Savela

Antti Tanskanen

Mats Akesson

There is provided an apparatus, a monitoring arrangement, a method, a crane and a tool for monitoring a condition of an elongated ferrous object having a longitudinal axis. Two magnetizing circuits including magnetic poles are arranged along the longitudinal axis of the object. A magnetic flux guide connects the poles. The magnetizing circuits are arranged around the object at opposite sides along the longitudinal axis, wherein the magnetizing circuits are hinged together to be movable between a closed position, where the object is enclosed between the poles of the magnetizing circuits and an open position, where monitored object is removable from the apparatus. The apparatus includes an enforcing element operatively connected to the magnetizing circuits such that, in the closed position, the magnetizing circuits are pressed towards each other; and the operative connection between the enforcing element and the magnetizing circuits is caused to disconnect on the basis of detecting a faulty portion of the longitudinal ferrous object by a force received from a faulty portion of the longitudinal ferrous object.

Monitoring condition of elongated ferrous object having a longitudinal axis

There is provided an apparatus for monitoring a condition of an elongated ferrous object having a longitudinal axis, said apparatus including at least one magnetizing circuit including magnetic poles separated along the longitudinal axis, and magnetic field sensors arranged at the poles, said poles including pole shoes for directing magnetic flux between the poles and the monitored object. The pole shoes include openings between the monitored object and the poles, an opening including two ends separated in a direction perpendicular to the longitudinal axis by a mid-section defining a smaller opening than the ends for concentrating the magnetic flux at the mid-section. There is further provided an arrangement including one or more elongated objects for hoisting payload, wherein the monitoring apparatus is attached to the elongated objects.

Apparatus and arrangement for monitoring a condition of an elongated ferrous object having a longitudinal axis

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Helsinki, Finland

Joni Silvo