Magnetic-inductive flow meter

The magnetic-inductive flow meter addresses the need for diameter-specific coil cores by using offset-stacked coil laminations, achieving efficient magnetic field coupling and cost reduction across a wide diameter range.

DE102024138118A1Pending Publication Date: 2026-06-18ENDRESS HAUSER FLOWTEC AG
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Patent Information

Authority / Receiving Office
DE · DE
Patent Type
Applications
Current Assignee / Owner
ENDRESS HAUSER FLOWTEC AG
Filing Date
2024-12-16
Publication Date
2026-06-18

AI Technical Summary

Technical Problem

Existing magnetic-inductive flowmeters require diameter-specific coil cores for each nominal diameter of the measuring tube, leading to increased manufacturing costs and complexity.

Method used

A magnetic-inductive flow meter design featuring a coil arrangement with offset stacking of coil core laminations, allowing a single coil core configuration to be used across a range of nominal diameters (DN350 to DN900) by ensuring optimal magnetic field coupling and minimizing air inclusions, thus reducing the need for diameter-specific parts.

Benefits of technology

This design achieves efficient magnetic field coupling and reduces manufacturing costs by allowing a single coil core configuration to be used across a wide range of diameters, eliminating the need for diameter-specific coil cores.

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Abstract

The invention relates to a magnetic-inductive flow meter for determining a flow velocity-dependent measured quantity of a medium, comprising: - a measuring tube (10) for guiding the medium; - two measuring electrodes (21, 22); - an electronic measuring circuit (30) which is electrically connected to the two measuring electrodes (21, 22), - a coil arrangement (41) for generating a magnetic field that penetrates the measuring tube (10) at least partially, wherein the coil arrangement (41) comprises a first coil (45a), wherein the first coil (45a) comprises a first coil former (46a), wherein the first coil former (46a), in particular exclusively, has a first coil core receptacle (SKA1), wherein the first coil core receptacle (SKA1), in particular transverse to a principal axis (SHA) of the first coil body (46a), is spatially separated from the second coil core receptacle (SK2), - a magnetic field guide (40), wherein the magnetic field guide (40) comprises a first coil core (47a), wherein, in particular exclusively, the first coil core (47a) is arranged in the first coil core receptacle (SKA1), wherein the first coil core (47a) comprises a plurality N of coil core laminations (147a, ..., 147n) stacked in the circumferential direction of the measuring tube (10), wherein at least two adjacent coil core laminations (147i, 147i+1) of the plurality of coil core laminations each have an imaginary coil core lamination main axis (SKHA1, SKHA2) which runs parallel to an imaginary main axis (SHA) of the first coil body (46a), wherein the at least two adjacent coil core laminations (147i, 147i+1) are positioned offset from each other in the direction of the respective coil core lamination main axis (SKHA1, SKHA2).
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