Coriolis mass flow meter with enhanced zero point stability having cross braces integrally formed with the housing

摘要

The invention relates to a Coriolis mass flow meter comprising two U-shaped measuring tubes having in each case two outer tube portions and an intermediate central tube portion. It comprises a vibration exciter for the purpose of effecting defined excitation of a movement of the measuring tubes, two vibration sensors for detecting movements of the measuring tubes and also a housing for accommodating at least parts of the measuring tubes. The inlets and outlets are rigidly connected to the housing. A first and a second cross brace, disposed in the region of the tube between its inlets and outlets for the purpose of coupling the two measuring tubes, form the vibration nodes of the measuring tubes. A tube portion of one measuring tube is integrally united with a tube portion of the other measuring tube. Furthermore, the two tube portions are integrally united with parts of the housing or integrally united with of one of the cross braces.

主权项

1. A Coriolis mass flow meter, comprising first and second U-shaped measuring tubes comprising in each case two outer tube portions and an intermediate central tube portion, wherein the first and second U-shaped measuring tubes are capable of allowing a fluid to flow therethrough, wherein said first and second U-shaped measuring tubes in each case comprise an inlet and an outlet;
a vibration exciter for defined excitation of a movement of said first and second U-shaped measuring tubes; two vibration sensors for detecting movements of said first and second U-shaped measuring tubes; a housing for accommodating at least parts of said first and second U-shaped measuring tubes, wherein more particularly said inlets and said outlets are rigidly connected to said housing; a first and a second cross brace for coupling the first and second U-shaped measuring tubes in a region between said inlets and outlets; wherein a first outer tube portion of the two outer tube portions of said first U-shaped measuring tube is integrally united with a first outer tube portion of the two outer tube portions of said second U-shaped measuring tube, wherein the first outer tube portion of the first U-shaped measuring tube and the first outer tube portion of the second U-shaped measuring tube are further integrally united with parts of the housing, wherein the first cross brace is integrally united with the first outer tube portion of said first U-shaped measuring tube and with the first outer tube portion of said second U-shaped measuring tube, wherein the first outer tube portion of said first U-shaped measuring tube is adjacent to the first outer tube portion of said second U-shaped measuring tube, and wherein the first cross brace forms a single-piece structure adjoining a wall portion of said housing.