Magnetic-inductive flowmeter

Patent metadata

Field	Value
Publication number	US-2023417584-A1
Application number	US-202118252373-A
Country	US
Kind code	A1
Filing date	Sep 23, 2021
Priority date	Nov 11, 2020
Publication date	Dec 28, 2023
Grant date	—

Abstract

The present disclosure relates to a magnetic-inductive flowmeter, comprising: a measuring pipe for conducting a medium, wherein the measuring pipe comprises an electrically insulating measuring pipe body; a device for generating a magnetic field that penetrates the measuring pipe body; a device for detecting an induced voltage, which is a function of a flow rate; a reference electrode; an electrode assembly for detecting damage to the measuring pipe body, wherein the electrode assembly is electrically insulated from the reference electrode and/or the medium by the measuring pipe body; a measuring circuit configured to measure a variable that is a function of an electrical impedance between the electrode assembly and the reference electrode.

First claim

1 - 9 . (canceled)

10 . A magnetic-inductive flowmeter, the flowmeter comprising:
a measuring pipe adapted to conduct a medium, wherein the measuring pipe comprises a measuring pipe body, which is electrically insulating in sections; a device configured to generate a magnetic field that penetrates the measuring pipe; a device configured to detect an induced voltage, which is a function of a flow rate in the medium; a reference electrode; an electrode assembly configured to detect damage to the measuring pipe body, wherein the electrode assembly is electrically insulated from the reference electrode and/or the medium by the measuring pipe body; and a measuring circuit configured to measure a variable that is a function of an electrical impedance between the electrode assembly and the reference electrode.

11 . The flowmeter of claim 10 , the electrode assembly comprising at least monitoring electrode, wherein the at least one monitoring electrode defines a monitoring electrode longitudinal direction, wherein the monitoring electrode has a material thickness, and wherein the material thickness in the monitoring electrode longitudinal direction increases in steps, at least in part.

12 . The flowmeter of claim 11 , wherein the at least one monitoring electrode is at least partially hollow cylindrical or annular.

13 . The flowmeter of claim 12 , wherein the measuring pipe body defines a pipe body longitudinal direction of the measuring pipe body, wherein the at least one monitoring electrode is oriented coaxially to the measuring pipe body and is arranged offset to the reference electrode in the pipe body longitudinal direction.

14 . The flowmeter of claim 13 , wherein the at least one monitoring electrode of the electrode assembly includes at least two monitoring electrodes.

15 . The flowmeter of claim 14 , wherein:
a first monitoring electrode of the at least two monitoring electrodes has a first internal diameter; a second monitoring electrode of the at least two monitoring electrodes has a second internal diameter; and the first internal diameter differs from the second internal diameter.

16 . The flowmeter of claim 15 , wherein the at least two monitoring electrodes are arranged offset from each other in the pipe body longitudinal direction.

17 . The flowmeter of claim 15 , wherein the at least two monitoring electrodes are arranged offset from each other coaxially in the pipe body longitudinal direction.

18 . The flowmeter of claim 15 , wherein the first monitoring electrode is enclosed, at least in a partial section, in a radial direction by the second monitoring electrode.

19 . The flowmeter of claim 10 , wherein:
the reference electrode extends through the measuring pipe body; the reference electrode is configured to electrically connect the medium with a reference potential; the at least one monitoring electrode defines an opening therethrough; and the reference electrode extends through the opening.

Assignees

• Flowtec Ag

Inventors

• Brütsch Tobias
• Mariager Simon
• Rüfenacht Markus
• Wohlgemuth Werner

Classifications

• G01F25/10

  of flowmeters · CPC title

• G01F1/584 Primary

  constructions of electrodes, accessories therefor · CPC title

• G01F1/60

  Circuits therefor · CPC title