Coriolis measuring transducer and coriolis measuring device

Patent metadata

Field	Value
Publication number	US-11906339-B2
Application number	US-202017599270-A
Country	US
Kind code	B2
Filing date	Feb 14, 2020
Priority date	Mar 25, 2019
Publication date	Feb 20, 2024
Grant date	Feb 20, 2024

Abstract

The invention relates to a Coriolis measuring transducer of a Coriolis measuring device comprising: at least one measuring tube; at least one exciter; at least two sensors; wherein at least one exciter or at least one sensor has a coil device and a magnet device, wherein the magnet device has a holder and at least a first magnet group and at least a second magnet group, wherein the holder has a body with a body length axis and a first end and a second end wherein the first end has an end surface, wherein the body has three recesses, wherein a central recess is separated, in each case, from an outer recess by, in each case, an intermediate wall, wherein each intermediate wall has an opening, and wherein the first magnet group is arranged in a first opening, and wherein the second magnet group is arranged in a second opening.

First claim

The invention claimed is:

1. A Coriolis measuring transducer for a Coriolis measuring device for registering mass flow or density of a medium flowing through at least one measuring tube, comprising:
the at least one measuring tube, which has an inlet and an outlet and which is adapted to convey the medium between the inlet and the outlet;
a support body, which is adapted to hold the at least one measuring tube,
at least one exciter, which is adapted to excite the at least one measuring tube to execute oscillations;
at least two sensors, which are adapted to register oscillations of the at least one measuring tube;
wherein at least one exciter and/or at least one sensor have/has, in each case, a coil device with, in each case, at least one coil, as well as, in each case, a magnet device, wherein the magnet device and the coil device are movable relative to one another,
wherein the magnet device has a holder and at least a first magnet group having at least one magnet and at least a second magnet group having at least one magnet,
wherein the holder has a body with a body length axis and a first end and a second end, wherein the first end has an end surface,
wherein the body has three recesses, which extend planparallel to one another and perpendicularly to the end surface, wherein a central recess is separated from outer recesses by intermediate walls,
wherein each intermediate wall has an opening, wherein the openings lie opposite one another across the central recess,
wherein the coil device is arranged at least sectionally in the central recess, and wherein the first magnet group is arranged in a first opening, and wherein the second magnet group is arranged in a second opening.

2. The Coriolis measuring transducer as claimed in claim 1 ,
wherein the openings extend from the end surface.

3. The Coriolis measuring transducer as claimed in claim 1 ,
wherein the magnet groups are held in their openings by means of an adhesive, wherein the adhesive is a ceramic adhesive.

4. The Coriolis measuring transducer as claimed in claim 1 , wherein each magnet group includes two magnets and at least one magnetically conductive, ferromagnetic, bridge element,
wherein the magnetic fields of the two magnets are oppositely oriented, and wherein the bridge element is adapted to guide and to bring together field lines of the magnetic fields of the two magnets,
wherein the magnets are mechanically in contact with the bridge element,
and
wherein the bridge element is arranged on a side of the magnet group facing away from the respectively other magnet group.

5. The Coriolis measuring transducer as claimed in claim 4 ,
wherein the at least one coil includes a central region and a winding region surrounding the central region,
wherein, in a resting state of the at least one measuring tube, a boundary between the magnets of a magnet group projected onto the cross sectional plane is located at least sectionally in the central region, and
wherein the magnets of a magnet group are arranged one after another in an oscillation direction.

6. The Coriolis measuring transducer as claimed in claim 1 , wherein the holder is made of a non-magnetic material and has a mass density less than 8 g/cm{circumflex over ( )}3.

7. The Coriolis measuring transducer as claimed in claim 1 ,
wherein the outer recesses are bounded by outer walls,
wherein each magnet group is supported by an associated outer wall.

8. The Coriolis measuring transducer as claimed in claim 1 ,
wherein the coil of an exciter is adapted to supply its magnet device with a force, and wherein the magnet device of a sensor is adapted to induce an electrical voltage in the coil of its coil device.

9. The Coriolis measuring transducer as claimed in claim 1 ,
wherein the measuring transducer includes two manifolds, wherein a first manifold is adapted on an upstream side of the measuring transducer to receive a medium entering from a pipeline into the measuring transducer and to convey such to the inlet of the at least one measuring tube,
wherein a second manifold is adapted to receive the medium emerging from the outlet of the at least one measuring tube and to convey such back into the pipeline.

10. The Coriolis measuring transducer of claim 1 ,
wherein the measuring transducer includes two process connectors, which are adapted to connect the measuring transducer with a pipeline.

11. The Coriolis measuring transducer as claimed in claim 1 ,
wherein the magnet device is connected mechanically with it's the at least one measuring tube, and wherein the coil device is secured translationally as well as rotationally relative to the inlet and the outlet.

12. The Coriolis measuring transducer as claimed in claim 1 , wherein the measuring transducer has the at least one measuring tube, wherein the holder/the coil device of the sensor, or exciter, is secured, in each case, to the at least one measuring tube, and wherein the coil device/the holder of the sensor, or exciter, is secured, in each case, to the support body, or wherein the sensor has a measuring tube pair of the at least one measuring tube, wherein the holder/the coil device of the sensor, or exciter, is secured, in each case, to a first measurement tube of the at least one measuring tube, and the coil device/the holder, is secured, in each case, to a second measuring tube of the at least one measuring tube.

13. The Coriolis measuring transducer as claimed in claim 11 , wherein the measuring transducer has two measuring tube pairs of the at least one measuring tubes.

14. A Coriolis measuring device comprising:
a Coriolis measuring transducer as claimed in claim 1 ;
an electronic measuring/operating circuit, wherein the electronic measuring/operating circuit is adapted to operate the exciter as well as the sensors,
wherein the electronic measuring/operating circuit is further adapted to ascertain flow measured values and/or density measured values, and,
wherein the measuring device has an electronics housing for housing the electronic measuring/operating circuit.

Assignees

• Flowtec Ag

Inventors

• Schwenter Benjamin
• Werner Marc
• Hollinger Claude
• Gschwend Gebhard

Classifications

• G01F1/8427 Primary

  detectors · CPC title

• G01F1/8422 Primary

  exciters · CPC title