Endress + Hauser Flowtec Ag

Leonhard Probst

Alfred Rieder

Wolfgang Drahm

Michael Fuchs

Ennio Bitto

Gerhard Eckert

Rainer Lorenz

Martin Anklin-Imhof

Michael Wiesmann

Christian Schuetze

Michal Fuchs

The measuring transducer includes: a measuring tube vibrating, at least at times, during operation and serving for conveying a medium, wherein the measuring tube communicates with a pipeline via an inlet tube piece at an inlet end and an outlet tube piece at an outlet end; a counteroscillator, which is affixed to the measuring tube on the inlet end to form a first coupling zone and affixed to the measuring tube on the outlet end to form a second coupling zone; a sensor arrangement secured, at least in part, to the counteroscillator for registering oscillations at least of the measuring tube; an exciter mechanism secured, at least in part, to the counteroscillator for driving at least the measuring tube; a transducer housing affixed to the inlet tube piece and the outlet tube piece; and connection lines, especially connection lines for the exciter mechanism and/or for the sensor arrangement, of which connection lines at least one is secured at least sectionally along the counteroscillator and secured at least pointwise thereto, as well as to the transducer housing. The connection lines are routed essentially symmetrically with respect to a principal axis of inertia of the inner part formed by means of measuring tube and counteroscillator, especially mirror-symmetrically with respect to at least one principal axis of inertia of the counteroscillator, whereby an essentially symmetrical damping force per unit length can be assured in the measuring transducer.

Vibration-type measuring transducer having connecting lines secured pointwise to the transducer housing

A measuring transducer includes: A measuring tube vibrating, at least at times, during operation and serving for conveying a medium, wherein the measuring tube communicates with a pipeline via an inlet tube piece at an inlet end and an outlet tube piece at an outlet end; a counteroscillator, which is affixed to the measuring tube on the inlet end to form a first coupling zone and affixed to the measuring tube on the outlet end to form a second coupling zone; and a transducer housing affixed to the inlet tube piece and the outlet tube piece. An exciter mechanism, for driving at least the measuring tube, and a sensor arrangement, for registering oscillations at least of the measuring tube, are, in each case, secured, at least in part, to the counteroscillator. Additionally, on the inlet side, an cantilever is so coupled in the region of the coupling zone with the inlet tube piece and the measuring tube, that the center of mass of the cantilever lies in the region of the inlet tube piece, and, on the outlet side, an cantilever is so coupled in the region of the coupling zone with the outlet tube piece and the measuring tube, that the center of mass of the cantilever lies in the region of the outlet tube piece. Furthermore, the measuring transducer includes connection lines, especially connection lines for the exciter mechanism and/or for the sensor arrangement, with at least one of the connection lines being secured to at least one of the two cantilevers.

Measuring transducer of the vibration-type with two cantilevers

A measuring transducer includes: a measuring tube vibrating at least at times and serving for conveying medium to be measured; a counteroscillator, which is affixed to the measuring tube on an inlet-side, to form a first coupling zone, and to the measuring tube on an outlet-side, to form a second coupling zone; an exciter mechanism for driving at least the measuring tube; as well as a sensor arrangement for registering oscillations at least of the measuring tube. During operation, the measuring tube executes, at least at times and/or at least in part, bending oscillations about an imaginary bending oscillation axis, which imaginarily connects the two coupling zones with one another. Additionally, at least a first spring element and a second spring element are included, with each of the at least two spring elements being affixed to the measuring tube and the counteroscillator spaced both from each of the two coupling zones as well as also from the exciter mechanism.

Measuring transducer of vibration-type

A measuring transducer includes: a measuring tube vibrating, at least at times, during operation and serving for conveying a medium, wherein the measuring tube communicates with a pipeline via an inlet tube piece on an inlet side and an outlet tube piece on an outlet side; a counteroscillator, which is affixed to the measuring tube on the inlet and outlet sides to form coupling zones; an cantilever coupled with the measuring tube on the inlet side; an cantilever coupled with the measuring tube on the outlet side; a sensor arrangement secured, at least in part, to the counteroscillator for registering oscillations at least of the measuring tube; an exciter mechanism secured, at least in part, to the counteroscillator for driving at least the measuring tube; a transducer housing affixed to the inlet tube piece and to the outlet tube piece; as well as connection lines, of which at least one is secured at least pointwise to the transducer housing and at least pointwise to an inner part of the measuring transducer formed by means of measuring tube, counteroscillator and the two cantilevers. A section at least of the one connection line extends freely suspended between two mutually spaced tie-down points. One of the tie-down points is located on the inner part of the measuring transducer and the other on the transducer housing. The two tie-down points are so placed that a relative distance therebetween remains essentially unchanged, even when the measuring tube is vibrating.

The measurement transducer includes: A measuring tube vibrating at least at times during operation and serving for the conveying of a medium, wherein the measuring tube communicates with a pipeline via an inlet tube piece at an inlet end and an outlet tube piece at an outlet end; a counteroscillator, which is affixed to the measuring tube on the inlet end to form a first coupling zone and affixed to the measuring tube on the outlet end to form a second coupling zone; and a first cantilever for producing bending moments in the inlet tube piece and coupled with the inlet tube piece and the measuring tube essentially rigidly in the area of the first coupling zone and having a center of mass lying in the region of the inlet tube piece, as well as a second cantilever for producing bending moments in the outlet tube piece and coupled essentially rigidly with the outlet tube piece and the measuring tube in the region of the second coupling zone and having a center of mass lying in the region of the outlet tube piece. The measurement transducer of the invention is especially suited also for measuring tubes having large nominal diameters of more than 50 mm.

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Hochwald SO, Switzerland

Leonhard Probst