EP2092277A1 - Vorrichtung zum messen des volumen- oder massestroms eines mediums in einer rohrleitung - Google Patents
Vorrichtung zum messen des volumen- oder massestroms eines mediums in einer rohrleitungInfo
- Publication number
- EP2092277A1 EP2092277A1 EP07822637A EP07822637A EP2092277A1 EP 2092277 A1 EP2092277 A1 EP 2092277A1 EP 07822637 A EP07822637 A EP 07822637A EP 07822637 A EP07822637 A EP 07822637A EP 2092277 A1 EP2092277 A1 EP 2092277A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- measuring
- electrode
- measuring tube
- medium
- tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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
- G01F1/584—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 electrodes, accessories therefor
Definitions
- the invention relates to a device for measuring the volume or mass flow of a medium in a pipeline, with a measuring tube, which is flowed through by the medium in the direction of the longitudinal axis of the measuring tube, with a magnet system which is designed such that it is a the measuring tube passing through, substantially transverse to the measuring tube axis generates magnetic field, with at least one coupling with the medium measuring electrode which is disposed in a substantially perpendicular to the magnetic field in a bore in the wall of the measuring tube, wherein the measuring electrode has an elongated shaft a first coupled to the medium flared end portion which is dimensioned so that its diameter is larger than the bore in the wall of the measuring tube, in which the measuring electrode is placed, and with a control / evaluation, based on the in the at least a measuring electrode induced measuring voltage information about the Volu or mass flow of the medium in the measuring tube delivers.
- Magnetic-inductive flowmeters exploit the principle of electrodynamic induction for the volumetric flow measurement: vertically induced to a magnetic field charge carriers of the medium induce a measuring voltage in likewise substantially perpendicular to the flow direction of the medium and perpendicular to the direction of the magnetic field arranged measuring electrodes.
- the measuring voltage induced in the measuring electrodes is proportional to the average flow velocity of the medium over the cross section of the measuring tube; it is therefore proportional to the volume flow. If the density of the medium is known, the mass flow in the pipeline or in the measuring tube can be determined.
- the measuring voltage is usually tapped via a pair of measuring electrodes, which is arranged with respect to the coordinate along the measuring tube axis in the region of maximum magnetic field strength and where consequently to expect the maximum measuring voltage is.
- the measuring electrodes are usually galvanically coupled to the medium; However, magnetic-inductive flowmeters with capacitively coupling measuring electrodes have also become known. In the following, reference will be made exclusively to measuring electrodes which are galvanically coupled to the
- the measuring tube may be made of either an electrically conductive material, e.g. Stainless steel, be made, or it is made of an electrically insulating material. If the measuring tube is made of an electrically conductive material, then it must be lined in the area coming into contact with the medium with a liner made of an electrically insulating material.
- the liner usually consists of a thermoplastic, a duroplastic or an elastomeric plastic.
- magnetic-inductive flow meters with a ceramic lining have also become known.
- the measuring electrodes are in addition to the magnet system, the central
- measuring electrodes Components of a magnetic-inductive flow sensor.
- care must be taken that they can be mounted in the measuring tube as simply as possible and that no leakage problems subsequently occur during measuring operation;
- the measuring electrodes should be distinguished by a sensitive and at the same time low-interference measurement signal acquisition.
- the configuration of the electrode head is limited by the diameter of the bore: an assembly from the outside is possible if the diameter of the electrode head is smaller than or equal to the diameter of the bore in the wall of the measuring tube, in which the measuring electrode is placed. It is preferable in the case of externally mountable measuring electrodes around pin electrodes, as described, for example, in EP 0 892 252 A1.
- pin electrodes are used in magnetic-inductive flow meters with small diameters, ie in areas where the installation from the inside due to the small dimensions is difficult or impossible to accomplish.
- the second type of measuring electrodes eliminates the restriction in
- the electrode head With regard to the dimensioning of the electrode head; here only the electrode shaft must be designed so that it can be mounted in the hole. Depending on the application, the electrode head can vary within wide limits both in size and in shape.
- Known internally mountable measuring electrodes usually have e.g. mushroom-shaped or lenticular or plate-shaped electrode heads. Incidentally, both types of measuring electrodes are used by the applicant in their flowmeters.
- the mushroom-shaped measuring electrode is fastened in a bore of the measuring tube which is lined with an electrically insulating material via a spring assembly and a screw connection.
- a peripheral edge is provided on the inner surface of the mushroom-shaped electrode head, which presses in the assembled state in the liner material.
- the sealing effect is achieved by a sharp-edged, frustoconical thickening in the region of the electrode shaft.
- the attachment of the measuring electrode in the bore via a plate spring and a screw connection.
- the invention is based on the object, a magnetic-inductive Suggest a flow meter with easy-to-install measuring electrodes.
- the object is achieved in that in the opposite second end portion of the elongated shaft of the measuring electrode at least one radial recess or a radial elevation is arranged, and that a clamping or latching element is provided which is designed such that it engages with the at least one radial depression or elevation fixes the measuring electrode in the bore of the measuring tube in the axial direction.
- a clamping or latching element is provided which is designed such that it engages with the at least one radial depression or elevation fixes the measuring electrode in the bore of the measuring tube in the axial direction.
- a frusto-conical portion in the region of the elongated shaft of the measuring electrode at least a frusto-conical portion is provided which is dimensioned and configured such that the measuring electrode in the bore is anchored in the assembled state in the axial direction.
- a plurality of frusto-conical sections are provided, which are arranged one behind the other in the longitudinal direction of the shaft. These frusto-conical sections improve the anchoring of the measuring electrode in the bore of the measuring tube and at the same time increase the tightness of the construction.
- the arrangement of several frustoconical sections in succession achieves an improved sealing effect in the region of the measuring electrode.
- the measuring tube is made of an electrically conductive material, an electrical insulation between the measuring electrode and the measuring tube is necessary.
- an electrically insulating, preferably disc-shaped insert is arranged between the measuring tube and clamping element.
- the insert In the mounted state of the measuring electrode, the insert is supported on the outer wall of the measuring tube.
- the insert is designed as a sealing element. This prevents that medium can diffuse into the region of the electrical connection of the measuring electrode.
- the insert in a measuring tube made of an electrically non-conductive material should only develop a sealing effect.
- the sealing element prevents media from entering the region of the electrical connection via the gap between measuring tube and liner.
- the widened end portion of the measuring electrode may be designed mushroom-shaped or lenticular or plate-shaped. It goes without saying that also otherwise shaped electrode heads can be used in connection with the invention. In particular, the shape of the electrode head can be optimally adapted to the respective application.
- an annular edge is provided on the inner surface of the widened electrode head, which pushes in the mounted state of the measuring electrode in the material of the measuring tube or in the liner.
- FIG. 1 a schematic representation of an embodiment of the inventive magnetic-inductive flowmeter
- FIG. 2 an enlarged view of the detail marked A in FIG. 1.
- Fig. 1 shows a schematic representation of an embodiment of the device according to the invention 1.
- the measuring tube 2 is flowed through by the medium 11 in the direction of the longitudinal axis 3 of the measuring tube 2.
- the medium 11 is at least to a small extent electrically conductive.
- the measuring tube 2 is made of an electrically conductive material
- the measuring tube 2 must be lined on its inner surface with an electrically non-conductive liner 17 (see FIG. 2); the liner 17 is preferably made of a material that is highly chemically and / or mechanically resistant.
- the alternating magnetic field B oriented perpendicular to the flow direction of the medium 11 is transmitted via a magnet system, e.g. via two diametrically arranged coil arrangements 6, 7 or via two electromagnets.
- a magnet system e.g. via two diametrically arranged coil arrangements 6, 7 or via two electromagnets.
- charge carriers located in the medium 11 migrate, depending on the polarity, to the two oppositely poled measuring electrodes 4, 5.
- the measuring voltage which builds up on the measuring electrodes 4, 5 is proportional to the flow velocity of the medium 11, averaged over the cross section of the measuring tube 2.
- H. it is a measure of the volume flow of the medium 11 in the measuring tube 2.
- the measuring tube 2 is incidentally about not shown in Fig. 1 separately connecting elements, for. As flanges, connected to a pipe through which the medium 11 flows.
- the two measuring electrodes 4, 5 are preferably measuring electrodes, whose end region coming into contact with the medium 11 is widened.
- the measuring electrodes 4, 5 are connected to the control evaluation unit 8.
- the control / evaluation unit 8 is connected via the connecting line 16 to an input / output unit 9.
- the evaluation / control unit 8 is the memory unit 10 assigned.
- FIG. 2 shows an enlarged view of the section A labeled A in FIG. 1, showing a preferred embodiment of the measuring electrode 4 according to the invention
- FIG. 5 shows that can be mounted from the inside in the bore 27 of the measuring tube 2.
- the measuring electrode 4, 5 consists of an elongated electrode shaft 18 and a widened electrode head 19.
- the electrode head 19 has the shape of a mushroom or lens head.
- the electrode head 19 may also be plate-shaped.
- a plurality of frusto-conical sections 20 are provided in succession, so that the electrode shaft 18 has a Christmas tree structure. Since the individual frusto-conical sections 20 are made relatively sharp-edged in their edge region, the measuring electrode 4; 5 anchored in the bore 27 of the liner material 28.
- the measuring electrode 4; 5 has a press fit in the bore 27. This compression is achieved in that in the end region of the measuring electrode 4; 5, which is not in contact with the medium 11, a roughening, a depression or groove or an elevation 21 is provided, into which engages a resilient clamping element 22 and a clamping element. Preferably, there is a circumferential recess or elevation 21. Between the insulating material 28 and the measuring tube 2 and the clamping element 22 and the clamping disc, a sealing washer 23 is arranged. In the case shown, the sealing disc 23 consists of an electrically insulating material, whereby an electrical insulation between the measuring electrode 4; 5 and the measuring tube 2 is ensured.
- the measurement performance of the flowmeter 1 according to the invention can be optimized for various applications.
- - By the arranged in Tannenbaum Jardinoconical sections 20, but possibly also by the annular edge 25 on the inner surface 26 of the widened region and possibly through the sealing washer 23 between clamping element 22 and measuring tube 2 an improved tightness is achieved; the probability of that medium
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006054635A DE102006054635A1 (de) | 2006-11-17 | 2006-11-17 | Vorrichtung zum Messen des Volumen- oder Massestroms eines Mediums in einer Rohrleitung |
PCT/EP2007/062397 WO2008059020A1 (de) | 2006-11-17 | 2007-11-15 | Vorrichtung zum messen des volumen- oder massestroms eines mediums in einer rohrleitung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2092277A1 true EP2092277A1 (de) | 2009-08-26 |
Family
ID=39091821
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07822637A Withdrawn EP2092277A1 (de) | 2006-11-17 | 2007-11-15 | Vorrichtung zum messen des volumen- oder massestroms eines mediums in einer rohrleitung |
Country Status (5)
Country | Link |
---|---|
US (1) | US8051722B2 (zh) |
EP (1) | EP2092277A1 (zh) |
CN (1) | CN101542241B (zh) |
DE (1) | DE102006054635A1 (zh) |
WO (1) | WO2008059020A1 (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2024176259A1 (en) * | 2023-02-20 | 2024-08-29 | VATTURKAR, Aabha Tushar | Magmeter flow tube assembly with integrated electrode insulation and method of fabrication thereof |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005050655A1 (de) * | 2005-10-20 | 2007-04-26 | Endress + Hauser Flowtec Ag | Magnetisch-induktives Durchflussmessgerät |
DE102007058898A1 (de) | 2007-12-05 | 2009-06-10 | Endress + Hauser Flowtec Ag | Elektrode für ein magnetisch-induktives Durchflussmessgerät |
DE102008036962A1 (de) * | 2008-08-08 | 2010-02-11 | Endress + Hauser Flowtec Ag | Magnetisch-induktives Durchflussmessgerät mit einer Elektrodenanordnung und Verfahren zu dessen Fertigung |
DE102010030229A1 (de) | 2010-06-17 | 2011-12-22 | Endress + Hauser Flowtec Ag | Verfahren zur Herstellung eines magnetisch-induktiven Durchflussmessgeräts |
DE102010038121A1 (de) * | 2010-10-12 | 2012-04-12 | Geiger Automotive Gmbh | Kontaktstift |
DE102011081491A1 (de) * | 2011-08-24 | 2013-02-28 | Endress + Hauser Flowtec Ag | L-Dichtring |
JP6157985B2 (ja) * | 2013-08-12 | 2017-07-05 | 株式会社東芝 | 電磁流量計 |
DE102014107200A1 (de) * | 2014-05-22 | 2015-11-26 | Endress + Hauser Flowtec Ag | Vorrichtung zum Messen des Volumenstroms eines Fluids |
GB201416287D0 (en) * | 2014-09-15 | 2014-10-29 | Univ Leeds | Tomography apparatus, multi-phase flow monitoring system and corresponding methods |
US9810559B2 (en) * | 2015-03-16 | 2017-11-07 | Invensys Systems, Inc. | Systems and methods for detecting leaks in an electromagnetic flowmeter |
DE102015113390B4 (de) * | 2015-08-13 | 2022-09-08 | Endress + Hauser Flowtec Ag | Magnetisch-induktives Durchflussmessgerät zur Ermittlung des Vorliegens eines vollausgebildeten rotationssymmetrischen Strömungsprofils |
DE102016123123A1 (de) * | 2016-11-30 | 2018-05-30 | Endress+Hauser Flowtec Ag | Magnetisch-induktives Durchflussmessgerät |
US10330511B2 (en) | 2017-06-22 | 2019-06-25 | Saudi Arabian Oil Company | Alternating magnetic field flow meters |
US10557730B2 (en) | 2017-06-22 | 2020-02-11 | Saudi Arabian Oil Company | Alternating magnetic field flow meters with embedded quality assurance and control |
JP6940392B2 (ja) * | 2017-12-15 | 2021-09-29 | アズビル株式会社 | 電磁流量計の電位検出用電極 |
DE102018126784A1 (de) * | 2018-10-26 | 2020-04-30 | Endress + Hauser Flowtec Ag | Magnetisch-induktives Durchflussmessgerät |
US11341830B2 (en) | 2020-08-06 | 2022-05-24 | Saudi Arabian Oil Company | Infrastructure construction digital integrated twin (ICDIT) |
US11687053B2 (en) | 2021-03-08 | 2023-06-27 | Saudi Arabian Oil Company | Intelligent safety motor control center (ISMCC) |
US12024985B2 (en) | 2022-03-24 | 2024-07-02 | Saudi Arabian Oil Company | Selective inflow control device, system, and method |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL6702477A (zh) | 1966-03-02 | 1967-09-04 | ||
EP0179285B2 (de) * | 1984-09-29 | 1992-01-22 | Josef Heinrichs Messgerätebau GmbH & Co. KG | Magnetisch-induktiver Durchflussmesser |
US4911594A (en) | 1989-06-21 | 1990-03-27 | Trw Inc. | Push-nut type fastener |
GB2298716B (en) * | 1995-03-10 | 1998-11-18 | Abb Kent Taylor Ltd | Flowmeters |
US5773723A (en) | 1995-09-29 | 1998-06-30 | Lewis; Peter B. | Flow tube liner |
DE29623770U1 (de) | 1995-10-18 | 1999-08-26 | Endress + Hauser Flowtec Ag, Reinach, Basel-Landschaft | Galvanische Elektroden von magnetisch-induktiven Durchflußmessern |
DE10312824B4 (de) * | 2003-03-22 | 2007-04-05 | Siemens Flow Instruments A/S | Magnetisch-induktiver Durchflußmesser |
-
2006
- 2006-11-17 DE DE102006054635A patent/DE102006054635A1/de not_active Withdrawn
-
2007
- 2007-11-15 WO PCT/EP2007/062397 patent/WO2008059020A1/de active Application Filing
- 2007-11-15 US US12/312,577 patent/US8051722B2/en not_active Expired - Fee Related
- 2007-11-15 CN CN2007800426638A patent/CN101542241B/zh not_active Expired - Fee Related
- 2007-11-15 EP EP07822637A patent/EP2092277A1/de not_active Withdrawn
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2008059020A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2024176259A1 (en) * | 2023-02-20 | 2024-08-29 | VATTURKAR, Aabha Tushar | Magmeter flow tube assembly with integrated electrode insulation and method of fabrication thereof |
Also Published As
Publication number | Publication date |
---|---|
DE102006054635A1 (de) | 2008-05-21 |
US8051722B2 (en) | 2011-11-08 |
CN101542241B (zh) | 2011-08-03 |
WO2008059020A1 (de) | 2008-05-22 |
US20100089171A1 (en) | 2010-04-15 |
CN101542241A (zh) | 2009-09-23 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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17P | Request for examination filed |
Effective date: 20090422 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR |
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17Q | First examination report despatched |
Effective date: 20091113 |
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DAX | Request for extension of the european patent (deleted) | ||
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20180602 |