Abb Reaktor Gmbh

Brown Boveri Reaktor Gmbh

Lothar Mehr

Huibrecht Pieter Vermaat

Hans Stohr

Heiko Forch

In order to measure torques on valves, measuring devices have heretofore been used which measure the force to be transmitted with the aid of weighing cells fitted with strain gauges. The structural make-up of such devices and the structural size resulting therefrom are not suitable to permit the measuring device to be permanently left between the valve and the electromotor, so that these measuring devices can be used only for periodic measurements. It is accordingly an object of the invention to provide a permanently installed device which allows continuous torque measurement. For this purpose, the housing of the actuator and the housing of the valve are connected to one another through a flanged bush. The flanged bush carries a strain gauge in the region of a recess, and has a clearance for the passage of the valve stem. While the flux of force reaches through an adaptor from the actuator to a threaded sleeve which adjusts the valve stem, the flanged bush fixedly disposed between the actuator and the valve is subjected to a torsional moment which is measured with the strain gauge.

Device for measuring the torque of a valve moved by an actuator

A steam generator having a steam generator chamber, a tube plate bordering the chamber, tubes terminating in the tube plate being accessible through the steam generator chamber, a tubular column in the steam generator chamber having an end facing toward the tube plate, and a swivel arm extended from the tubular column being movable parallel to the tube plate for carrying a device for testing and/or repairing the steam generator tubes, includes a clamping element for positioning the tubular column relative to a tube of the tube plate, and a coupling being detachable from outside the steam generator chamber connecting the clamping element to the tubular column, the clamping element including a drive element disposed in the tubular column, an expansion plunger connected to the drive element for axially inserting the expansion plunger partially into a tube, an expansion sleeve formed of separate clamping jaws for engaging the tubes, the clamping jaws having ends being insertible into a tube, and a holding element movable by the expansion plunger for engaging the ends of the clamping jaws, the expansion plunger being axially movable toward the tubular column by the drive element in a opening motion causing the clamping jaws to release the tube, and the expansion plunger being axially movable away from the tubular column in a closing motion causing the clamping jaws to engage the tube.

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Lampertheim, Germany

Lothar Mehr