WO2015047617A1 - Improved magnetic core configuration for magnetic flowmeters - Google Patents
Improved magnetic core configuration for magnetic flowmeters Download PDFInfo
- Publication number
- WO2015047617A1 WO2015047617A1 PCT/US2014/052464 US2014052464W WO2015047617A1 WO 2015047617 A1 WO2015047617 A1 WO 2015047617A1 US 2014052464 W US2014052464 W US 2014052464W WO 2015047617 A1 WO2015047617 A1 WO 2015047617A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- flowtube
- magnetic core
- magnetic
- assembly
- stem
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
- G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
- G01F1/588—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters combined constructions of electrodes, coils or magnetic circuits, accessories therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
- G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
- G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
- G01F1/586—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters constructions of coils, magnetic circuits, accessories therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
Definitions
- Magnetic flow meters are known and typically utilize an electrically insulated flowtube that carries a flow of process fluid past a coil of an electromagnet and past a pair of electrodes.
- the electromagnet applies an electromagnetic field to the flowing process fluid. Due to Faraday's Law of electromagnetic induction, a voltage or Electromotive Force (EMF) is generated between the pair of electrodes disposed in the process fluid. This voltage is a function of the strength of the applied magnetic field and is proportional to the fluid's rate of flow.
- EMF Electromotive Force
- a flowtube assembly for a magnetic flowmeter includes a flowtube configured to receive a flow of process fluid therethrough.
- a magnetic core is mounted relative to the flowtube and includes a stem extending from the flowtube to a pair of arms. Each of the arms extends away from the stem.
- a spool having a plurality of magnetic windings is disposed about the stem and spaces the plurality of windings from the flowtube.
- FIG. 1 is a diagrammatic view showing a process control system including a magnetic flowmeter.
- FIG. 2 is a diagrammatic view of a magnetic flowmeter in accordance with an embodiment of the present invention.
- FIG. 4 is a diagrammatic view of a magnetic core configuration in a magnetic flowmeter in accordance with an embodiment of the present invention. DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS
- Magnetic flowmeter 102 includes electronics housing 120 connected to flowtube 108. Magnetic flowmeter 102 outputs are configured for transmission over long distances to a controller or indicator via process communication bus 106.
- communication bus 106 can be 4-20 mA current loop, a FOUNDATIONTM Fieldbus connection, a pulse output/frequency output, a Highway Addressable Remote Transducer (HART ® ) protocol communication, a wireless communication connection, such as that in accordance with IEC 62591, Ethernet, or a fiber optic connection to a controller such a system controller/monitor 110 or other suitable device.
- HART ® Highway Addressable Remote Transducer
- FIG. 2 is a diagrammatic view of a magnetic flowmeter having an improved magnetic core in accordance with the embodiment of the present invention.
- Flowmeter 150 includes T- shaped magnetic core 152 that extends from a substantially centered position 154 on flowtube 156 to each of side rings 158, 160. Additionally, a second T-shaped magnetic core 162 is mounted opposite core 152 on flowtube 156. In this way, current passing through coils 164, 166 generates a magnetic flux as indicated by magnetic flux lines 168.
- the magnetic flux indicated at reference numeral 168 is considered a primary magnetic flux in that it is the magnetic flux that induces a voltage or EMF across the conductive process fluid in relation to the flow rate of the process fluid.
- a pair of electrodes (not shown in FIG.
- FIG. 3 is a diagrammatic cross sectional view of a portion of magnetic flowmeter 150 in accordance with an embodiment of the present invention.
- FIG. 3 only a portion of the flowtube 156 is shown.
- an electrically non-conducting interior liner 170 is provided adjacent metallic flowtube 156.
- Liner 170 ensures that the EMF induced in the process fluid does not reach metallic flowtube, which would short out induced EMF.
- liner 170 may be omitted.
- an electrode 172 passes through non-conductive liner 170 and contacts process fluid flowing through flowtube 156.
- coil winding spool 182 includes a number of features that facilitate securely mounting wires 196, 198 in fixed positions within flowtube 150.
- electrode wire 196 passes by tab 200 which includes an aperture to which a cable tie or other suitable wire securing device can be snapped or otherwise affixed. This provides positive location of electrode wire 196 with respect to the magnetic field, which is very important to the operation of the magnetic flowmeter.
- wire 198 is bent at location 202 and passes through aperture 204 in guide 188 of spool 182.
- coil lead wire 198 is held in a precise location and strain relieved by passing through holes in the coil winding spools. This provides positive location and strain relief for the wires.
- One of the current challenges for known flowtube designs is that the combination of the heat generated by the magnetic coils and the heat escaping through the flowtube combine to increase the temperature of the coil. This forces a limit on the maximum process and ambient temperatures based on the thermal class rating of the magnetic wire, and/or the safety protection type (hazardous location rating) of the device.
- the maximum temperature of the coil can be reduced significantly. In one embodiment, dimension d is approximately 0.35 inches. This significantly reduces the maximum temperature of the coil in two ways. First, the temperature is reduced directly by providing thermal isolation from the flowtube wall.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measuring Volume Flow (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2919858A CA2919858C (en) | 2013-09-26 | 2014-08-25 | Improved magnetic core configuration for magnetic flowmeters |
RU2016110997A RU2618753C1 (en) | 2013-09-26 | 2014-08-25 | Enhanced configuration of magnetic core for magnetic flowmeters |
EP14761507.4A EP3019835B1 (en) | 2013-09-26 | 2014-08-25 | Improved magnetic core configuration for magnetic flowmeters |
JP2016545735A JP6235157B2 (en) | 2013-09-26 | 2014-08-25 | Improved magnetic core configuration for electromagnetic flowmeters |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/038,296 US9097566B2 (en) | 2013-09-26 | 2013-09-26 | Magnetic core configuration for magnetic flowmeters |
US14/038,296 | 2013-09-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015047617A1 true WO2015047617A1 (en) | 2015-04-02 |
Family
ID=51493081
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2014/052464 WO2015047617A1 (en) | 2013-09-26 | 2014-08-25 | Improved magnetic core configuration for magnetic flowmeters |
Country Status (7)
Country | Link |
---|---|
US (1) | US9097566B2 (en) |
EP (1) | EP3019835B1 (en) |
JP (1) | JP6235157B2 (en) |
CN (2) | CN203848882U (en) |
CA (1) | CA2919858C (en) |
RU (1) | RU2618753C1 (en) |
WO (1) | WO2015047617A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9097566B2 (en) * | 2013-09-26 | 2015-08-04 | Rosemount Inc. | Magnetic core configuration for magnetic flowmeters |
US9631962B2 (en) | 2014-03-18 | 2017-04-25 | Rosemount Inc. | Magnetic core configuration for magnetic flowmeters having a plurality of layers of magnetically permeable material |
US10371550B2 (en) * | 2016-10-24 | 2019-08-06 | Ademco Inc. | Compact magnetic field generator for magmeter |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007004826A1 (en) * | 2007-01-31 | 2008-08-14 | Ifm Electronic Gmbh | Measuring device for magnetically inductive flow meter, has measurement cross section for flow measure of medium flowing through measurement cross section |
DE102009001413A1 (en) * | 2009-03-09 | 2010-09-16 | Ifm Electronic Gmbh | Coil assembly for use in magnetic inductive flow-meter used in e.g. hardening system for measuring flow of water, has flat planar coupling plates, where field line density in plates is smaller than field line density in coil cores |
WO2013010715A1 (en) * | 2011-07-18 | 2013-01-24 | Endress+Hauser Flowtec Ag | Magnetic-inductive flow meter |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4098118A (en) | 1977-02-23 | 1978-07-04 | Fischer & Porter Co. | Unitary electromagnetic flowmeter |
EP0047342B1 (en) | 1980-09-04 | 1984-01-11 | Rheometron Ag | Measurement pick-up device for electromagnetic flow meters |
DE3511033A1 (en) * | 1985-03-27 | 1986-10-02 | Rheometron AG, Basel | MEASURING VALUE FOR MAGNETIC-INDUCTIVE FLOW MEASURING DEVICES |
JPS63145919A (en) * | 1986-07-28 | 1988-06-18 | Toshiba Corp | Detector for electromagnetic flowmeter |
JP2557531B2 (en) | 1989-09-12 | 1996-11-27 | 株式会社東芝 | Electromagnetic flow meter |
ES2101404T3 (en) | 1993-10-14 | 1997-07-01 | Flowtec Ag | INDUCTIVE-MAGNETIC FLOW DETECTORS. |
US6085599A (en) * | 1995-04-26 | 2000-07-11 | Feller; Murray F. | Magnetic flow sensor |
JP3662312B2 (en) * | 1995-10-27 | 2005-06-22 | 株式会社山武 | Electromagnetic flow meter |
US6463807B1 (en) * | 2000-11-02 | 2002-10-15 | Murray F. Feller | Magnetic flow sensor and method |
JP2004294176A (en) * | 2003-03-26 | 2004-10-21 | Yokogawa Electric Corp | Electromagnetic flowmeter |
DE102006020265A1 (en) * | 2006-04-27 | 2007-10-31 | Endress + Hauser Flowtec Ag | Magnetic-inductive sensor for use as primary transducer in line measuring instrument, has measuring tube and coil holder connected with one another in joint-free manner, so that coil is formed as integral component of measuring tube |
DE102008035740A1 (en) * | 2008-07-31 | 2010-02-04 | Abb Technology Ag | Magnetic inductive flow meter with a combined magnetic flux guide comprising Elektromagenteinheit |
US9097566B2 (en) * | 2013-09-26 | 2015-08-04 | Rosemount Inc. | Magnetic core configuration for magnetic flowmeters |
-
2013
- 2013-09-26 US US14/038,296 patent/US9097566B2/en active Active
-
2014
- 2014-04-22 CN CN201420197472.6U patent/CN203848882U/en not_active Expired - Fee Related
- 2014-04-22 CN CN201410162800.3A patent/CN104515556B/en active Active
- 2014-08-25 JP JP2016545735A patent/JP6235157B2/en active Active
- 2014-08-25 EP EP14761507.4A patent/EP3019835B1/en active Active
- 2014-08-25 RU RU2016110997A patent/RU2618753C1/en not_active IP Right Cessation
- 2014-08-25 WO PCT/US2014/052464 patent/WO2015047617A1/en active Application Filing
- 2014-08-25 CA CA2919858A patent/CA2919858C/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007004826A1 (en) * | 2007-01-31 | 2008-08-14 | Ifm Electronic Gmbh | Measuring device for magnetically inductive flow meter, has measurement cross section for flow measure of medium flowing through measurement cross section |
DE102009001413A1 (en) * | 2009-03-09 | 2010-09-16 | Ifm Electronic Gmbh | Coil assembly for use in magnetic inductive flow-meter used in e.g. hardening system for measuring flow of water, has flat planar coupling plates, where field line density in plates is smaller than field line density in coil cores |
WO2013010715A1 (en) * | 2011-07-18 | 2013-01-24 | Endress+Hauser Flowtec Ag | Magnetic-inductive flow meter |
Also Published As
Publication number | Publication date |
---|---|
US20150082908A1 (en) | 2015-03-26 |
JP6235157B2 (en) | 2017-11-22 |
CN203848882U (en) | 2014-09-24 |
CN104515556B (en) | 2018-09-21 |
RU2618753C1 (en) | 2017-05-11 |
CA2919858A1 (en) | 2015-04-02 |
EP3019835B1 (en) | 2020-01-08 |
EP3019835A1 (en) | 2016-05-18 |
JP2016532131A (en) | 2016-10-13 |
CA2919858C (en) | 2018-06-05 |
US9097566B2 (en) | 2015-08-04 |
CN104515556A (en) | 2015-04-15 |
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