Magnetic-inductive flow meter
The magnetic-inductive flow meter addresses the need for diameter-specific coil cores by employing a coil arrangement with spatially separated receptacles and offset laminations, enhancing magnetic field coupling and reducing costs through the use of fewer parts for various diameters.
WO2026131086A1PCT designated stage Publication Date: 2026-06-25ENDRESS HAUSER FLOWTEC AG
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- ENDRESS HAUSER FLOWTEC AG
- Filing Date
- 2025-12-02
- Publication Date
- 2026-06-25
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 spatially separated coil core receptacles and offset stacking of coil core laminations, allowing for a magnetic system suitable for a range of nominal diameters with fewer identical parts, eliminating the need for diameter-specific coil cores.
Benefits of technology
This design achieves optimal magnetic field coupling into the medium, reduces manufacturing costs, and simplifies the production process by using a few identical parts for a wide range of nominal diameters.
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Smart Images
Figure EP2025085038_25062026_PF_FP_ABST
Abstract
The invention relates to a magnetic-inductive flow meter for determining a flow-rate-based measurement variable 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 assembly (41) for generating a magnetic field which at least partly passes through the measuring tube (10), the coil assembly (41) comprising a first coil (45a), the first coil (45a) comprising a first coil body (46a), the first coil body (46a) having a first coil core receiving area (SKA1), in particular solely a first coil core receiving area, the first coil core receiving area (SKA1) being spatially separated from the second coil core receiving area (SK2), in particular transversely to the main axis (SHA) of the first coil body (46a), and - a magnetic field guide (40), the magnetic field guide (40) comprising a first coil core (47a), the first coil core (47a), in particular solely the first coil core, being situated in the first coil receiving area (SKA1), and the first coil core (47a) comprising a plurality N of coil core laminations (147a,..., 147n) stacked in the circumferential direction of the measuring tube (10). At least two adjacent coil core laminations (147i, 147i+1) of the plurality of coil core laminations have a respective imaginary coil core lamination main axis (SKHA1, SKHA2) which runs parallel to an imaginary main axis (SHA) of the first coil body (46a), the at least two adjacent coil core laminations (147i, 147i+1) being offset from one another in the direction of the respective coil core lamination main axis (SKHA1, SKHA2).
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