Magnetically inductive flow meter

Patent metadata

Field	Value
Publication number	US-12247859-B2
Application number	US-202118001945-A
Country	US
Kind code	B2
Filing date	Jun 14, 2021
Priority date	Jun 17, 2020
Publication date	Mar 11, 2025
Grant date	Mar 11, 2025

Abstract

A magnetically inductive flow measuring probe comprises a housing that is adapted to be exposed to the medium; two measuring electrodes arranged in a housing end section for forming a galvanic contact with the medium and for sensing a voltage induced in the flowing medium; and a means for producing a magnetic field passing through the housing end section. The means includes a coil arrangement and a field guide body. The field guide body comprises two field guide body legs connected with a coil core, extending to a front section of the housing and adapted to serve as field guideback. Orthogonal projections of the measuring electrodes and the field guide body onto a cross sectional plane are disjoint.

First claim

The invention claimed is:

1. A magnetically inductive flow measuring probe for insertion into an opening of a pipeline flowed through by a flowable medium and for ascertaining a flow-velocity-dependent measured variable of a flowable medium, the magnetically inductive flow measuring probe comprising:
a housing that is adapted to be exposed to the medium, the housing having:
a housing end section; and
a housing case that encloses a housing interior;

two measuring electrodes arranged in the housing end section for forming a galvanic contact with the medium and for sensing a voltage induced in the flowing medium, wherein each of the two measuring electrodes has a measuring electrode contact element protruding inwardly into the housing interior, wherein the two measuring electrode contact elements are arranged such that a housing longitudinal plane extends through the two measuring electrode contact elements;
a means for producing a magnetic field that passes through the housing end section, wherein the means for producing the magnetic field is arranged in the housing interior and includes a coil arrangement and a field guide body, wherein the coil arrangement includes an opening, and the field guide body includes a coil core that extends through the opening in the coil arrangement,
wherein the field guide body includes two field guide body legs connected with the coil core and extending to a front section of the housing and adapted to serve as a field guideback,
wherein orthogonal projections of the measuring electrodes and the field guide body onto a cross sectional plane perpendicular to a longitudinal axis of the housing are disjoint.

2. The magnetically inductive flow measuring probe as claimed in claim 1 ,
wherein a field guide body longitudinal plane extends through the two field guide body legs, and
wherein the housing longitudinal plane and field guide body longitudinal plane define an angle β with 0°<β≤90°.

3. The magnetically inductive flow measuring probe as claimed in claim 2 ,
wherein the field guide body legs are, at least partially, strip shaped, and/or
wherein the field guide body has exactly two mutually perpendicular mirror planes, and one of the two mirror planes and the field guide body longitudinal plane coincide.

4. The magnetically inductive flow measuring probe as claimed in claim 2 ,
wherein the coil arrangement includes a coil, a coil support and two coil contact elements,
wherein the coil contact elements are connected with a coil wire wound on the coil support and forming the coil,
wherein the two coil contact elements are arranged on the coil support on a side far from the housing end section,
wherein a coil arrangement longitudinal plane extends through the two coil contact elements,
wherein a field guide body longitudinal plane extends through the two field guide body legs, and
wherein the field guide body longitudinal plane and the coil arrangement longitudinal plane define an angle α with 0°≤α≤90°.

5. The magnetically inductive flow measuring probe as claimed in claim 4 ,
wherein a line of intersection of the housing longitudinal plane and the field guide body longitudinal plane coincides with a longitudinal axis of the housing, and/or
wherein a line of intersection of the housing longitudinal plane and the coil arrangement longitudinal plane coincides with the longitudinal axis of the housing.

6. The magnetically inductive flow measuring probe as claimed in claim 1 , further comprising:
a measuring circuit for ascertaining a measurement voltage induced on the two measuring electrodes,
wherein the measuring circuit is arranged in the housing interior and separably connected with the measuring electrode contact elements mechanically and electrically, and
wherein the measuring circuit is arranged on a circuit board and the circuit board has measuring electrode counter contact elements embodied complementary to the measuring electrode contact elements and embodied to form a plug-in connection with the measuring electrode contact elements.

7. The magnetically inductive flow measuring probe as claimed in claim 6 , further comprising:
an operating circuit for operating the coil arrangement,
wherein the operating circuit is arranged in the housing interior and separably connected with the coil arrangement mechanically and electrically,
wherein the operating circuit is arranged on a circuit board, and the circuit board has coil counter contact elements embodied complementary to the coil contact elements, and
wherein the coil counter contact elements form a plug-in connection with the coil contact elements.

8. The magnetically inductive flow measuring probe as claimed in claim 7 ,
wherein the circuit board has two circuit board legs with, in each case, a circuit board leg end section,
wherein the circuit board legs extend from a circuit board main body in a direction of the front section of the housing,
wherein the two measuring electrode counter contact elements are arranged, in each case, in a different one of the two circuit board leg end sections.

9. The magnetically inductive flow measuring probe as claimed in claim 8 ,
wherein the two coil counter contact elements are arranged on the circuit board main body.

10. The magnetically inductive flow measuring probe as claimed in claim 9 ,
wherein the circuit board has two sides facing away from one another,
wherein the coil counter contact elements are arranged, in each case, on different sides of the circuit board, and/or
wherein the measuring electrode counter contact elements are arranged, in each case, on different sides of the circuit board.

11. The magnetically inductive flow measuring probe as claimed in claim 9 ,
wherein the circuit board has two sides facing away from one another,
wherein the coil counter contact elements are arranged, in each case, on same sides of the circuit board, and/or
wherein the measuring electrode counter contact elements are arranged, in each case, on same sides of the circuit board.

Assignees

• Flowtec Ag

Inventors

• Tschudin Beat
• Worreth Bruno
• Bier Thomas
• Weiss Steffen
• Mariager Simon

Classifications

• G01F1/60

  Circuits therefor · CPC title

• G01F1/586

  constructions of coils, magnetic circuits, accessories therefor (G01F1/582 takes precedence; magnet; inductances; transformers; selection of materials for their magnetic properties per se H01F) · CPC title

• G01F1/588 Primary

  combined constructions of electrodes, coils or magnetic circuits, accessories therefor · CPC title