WO2009000679A1 - Appareil de mesure de débit par induction magnétique - Google Patents

Appareil de mesure de débit par induction magnétique Download PDF

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Publication number
WO2009000679A1
WO2009000679A1 PCT/EP2008/057487 EP2008057487W WO2009000679A1 WO 2009000679 A1 WO2009000679 A1 WO 2009000679A1 EP 2008057487 W EP2008057487 W EP 2008057487W WO 2009000679 A1 WO2009000679 A1 WO 2009000679A1
Authority
WO
WIPO (PCT)
Prior art keywords
measuring tube
electronics
measuring
meter
shells
Prior art date
Application number
PCT/EP2008/057487
Other languages
German (de)
English (en)
Inventor
Frank Voigt
Original Assignee
Endress+Hauser Flowtec Ag
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Endress+Hauser Flowtec Ag filed Critical Endress+Hauser Flowtec Ag
Publication of WO2009000679A1 publication Critical patent/WO2009000679A1/fr

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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

Definitions

  • the invention relates to a magnetic inductive flowmeter.
  • Flow meters are used in industrial metrology for the measurement of volume flows.
  • a current measurement method is based on the magneto-hydrodynamic principle and is used in magnetic inductive flowmeters.
  • an at least to a small extent electrically conductive medium whose volume flow is to be measured passed through a measuring tube which is penetrated substantially perpendicular to the tube axis of a magnetic field.
  • Perpendicular to the magnetic field moving charge carriers induce perpendicular to their flow direction, a voltage which can be tapped via appropriately arranged measuring electrodes.
  • the measuring electrodes are either capacitively or galvanically coupled to the medium. The induced voltage is proportional to averaged over a cross section of the measuring tube flow velocity of the medium and thus proportional to the volume flow.
  • magneto-inductive flowmeters have regularly a measuring tube, the interior of which flows through the medium in the measuring operation.
  • a magnetically inductive flow measuring transducer which comprises a device for generating a magnetic field passing through the measuring tube and measuring electrodes inserted in the measuring tube. In the measuring mode, a voltage induced in the medium can be tapped off via the electrodes.
  • the sensor is usually surrounded by a sensor housing, which consists for example of two interconnected the measuring tube enclosing half-shells.
  • a separate electronics housing is mounted, in which a meter electronics is located, which is connected for example via a corresponding connection or passage electrically to the arranged in the sensor housing sensor.
  • the meter electronics preferably includes the entire for the Operation of the flowmeter required electronics. These include electronics for controlling the device for generating the magnetic field, an electronics for recording measured by the measuring electrodes measuring signals, an electronics for processing and / or processing of these measurement signals, as well as a signal processing that generates all the desired measurement results based on the measurement signals and another Display and / or processing. In addition, the power supply of the sensor via the meter electronics.
  • the electronics housing generally has a connection space in which run to the meter electronics connected connection lines, which are guided via an inserted into an outer wall of the electronics housing implementation to the outside.
  • These power cables which are accessible from the outside, are used to supply power to the measuring device, if necessary to communicate with the measuring device, and to transmit the measurement results.
  • the invention consists in a magneto-inductive flowmeter for measuring a flow of a medium through an existing pipeline system, with
  • a measuring tube the interior of which flows through the medium during measuring operation
  • a single meter housing A single meter housing
  • the electronics compartment is arranged in a first half-shell and the connection space is arranged in a second half-shell.
  • the meter housing is completed by a the electronics room and the terminal compartment to the outside final lid, in which an externally accessible user interface of the flowmeter and / or a display is integrated.
  • the meter electronics is arranged on a circuit board having two opposing edge portions extending in two opposite identical form in one of the half shells integrated guide rails.
  • the senor comprises a field jacket sheet, which surrounds the measuring tube, and the guide rails and the board are arranged parallel to an outer space facing the electronics compartment of the field jacket plate.
  • a plug contact is provided on an end face of the board, via which the meter electronics can be connected to the sensor, and in the first half-shell an interface print is provided with a receiving socket to which the sensor is connected, and in the the plug contact can be inserted.
  • the lid is detachable with the lid
  • Encoder housing is connected, and the meter electronics is interchangeable through an opening formed by the removal of the lid of the meter housing.
  • the two half-shells made of a thermoplastic material and are connected to each other non-positively or cohesively.
  • the magnetic inductive flowmeter according to the invention has the advantage that it has only a single meter housing. This makes it very compact, has small dimensions, and can be produced inexpensively.
  • this meter offers a high degree of functionality.
  • the integration of the user interface and / or the display in the lid provides additional convenience for the user, without thereby increasing the dimensions of the meter as a whole.
  • the meter electronics can be easily replaced by removing the lid.
  • FIG. 1 shows a partially sectioned view of a magnetic inductive flowmeter according to the invention
  • Fig. 2 shows a section through the flow meter of Fig. 1;
  • Fig. 3 shows: a view of a first half-shell of the meter housing of Fig. 1;
  • FIG. 4 shows a view of a second half-shell of the meter housing of FIG. 1; FIG. and
  • Fig. 5 shows: a view of a lid of the meter housing with an integrated therein user interface and a display integrated therein.
  • Fig. 1 shows a partially sectioned view of a magnetic inductive flowmeter according to the invention for measuring a flow of a medium through an existing pipeline system.
  • the flowmeter on a measuring tube 1, the interior of which flows through the medium in the measuring operation.
  • process connections 2 At the end of the measuring tube 1 are process connections 2, in the exemplary embodiment shown in FIG. 1 two flanges are formed, with which the measuring tube 1 of the flowmeter can be inserted into the existing pipeline system.
  • the flowmeter has a magnetically inductive flow measuring transducer arranged directly on the measuring tube 1.
  • This device comprises a device mounted on the measuring tube 1 for generating a magnetic field passing through the measuring tube 1, and electrodes 3 inserted into the measuring tube 1, by means of which a voltage induced in the medium can be tapped in the measuring mode.
  • Fig. 2 shows a section through the flow meter of Fig. 1; in which the device for generating the magnetic field and the electrodes 3 are shown.
  • the device for generating the magnetic field comprises a coil arrangement, which in the illustrated embodiment consists of two coils 5 arranged opposite one another on both sides of the measuring tube 1.
  • the coils 5 are flowed through in measuring operation by an excitation current, which causes the formation of a magnetic field, the measuring tube 1 in essentially traversed perpendicular to the tube axis.
  • the device additionally comprises a field jacket plate 4, which surrounds at least a part of the measuring tube 1.
  • the field coat plate 4 has an octagonal cross-section, and serves to return the magnetic field.
  • Electrodes 3 Perpendicular to the magnetic field moving charge carriers induce perpendicular to the flow direction, a voltage which can be tapped off via the electrodes 3.
  • two electrodes 3 are provided in the illustrated embodiment, which are arranged opposite each other on both sides of the measuring tube 1 such that an imaginary line connecting the electrodes 3 perpendicular to an imaginary line connecting the two coils 5 and thus perpendicular to the magnetic field.
  • the flowmeter according to the invention has a single
  • the meter housing 7 consists of two interconnected the measuring tube 1 enclosing half-shells 11 and 13.
  • a meter housing 7 final lid 15 is also provided.
  • Fig. 3 shows a view of the first half-shell 11
  • Fig. 4 is a view of the second half-shell 13
  • Fig. 5 is a view of the lid 15.
  • the two half-shells 11, 13 each have two opposite outer walls, in each of which a semicircular recess 17, between which the measuring tube 1 is clamped.
  • sealing provided between the voltage applied to the measuring tube 1 end faces 19 of the recesses and the measuring tube 1 is one, not shown in the figures, sealing provided.
  • a groove 21, for receiving the seal As a seal is suitable, for. a to be inserted into the groove 21 O-ring or a molded seal.
  • the two half-shells 11, 13 are preferably made of a thermoplastic material and are connected to each other non-positively or cohesively.
  • thermoplastics are used for example, by glass fibers reinforced polyamide (PA), polyurethanes or polycarbonates used.
  • PA glass fibers reinforced polyamide
  • a non-positive connection for example, by a screw connection of the two half-shells 11, 13 are effected together.
  • a cohesive connection can be effected for example by a weld or a bond.
  • the half shells 11, 13 may be made of die-cast aluminum. In that case, however, at least partial areas of the half-shells 11, 13 would have to be provided with an insulating inner coating.
  • the electronics compartment 23 is located in the first half-shell 11. Alternatively, it could also be arranged in the second half-shell 13 or extend from the first into the second half-shell.
  • the meter electronics 9 includes here all the electronics required for the operation of the flowmeter. These include electronics for controlling the device for generating the magnetic field, an electronics for recording measured by means of the electrodes 3 measuring signals, an electronics for processing and / or processing of these measurement signals, as well as a signal processing that generates all the desired measurement results from the measurement signals and a makes available to further display and / or processing. In addition, the power supply of the flowmeter via the meter electronics 9.
  • terminal space 25 is provided in which connected to the meter electronics 9 connecting lines 27 extend over a inserted into an outer wall 29 of the half shells 13 Passage 31 are led to the outside.
  • Terminal space 25 arranged in the second half-shell 13, and the passage 31 is inserted into the second half-shell 13.
  • connection space 25 could also be arranged in the first half-shell 11 or extend from the first into the second half-shell.
  • the outgoing leads 27 serve the
  • the second half-shell 13 outside in the region of the passage 31 on a recess 32 in which an outwardly facing part of the bushing 31 is arranged protected from external mechanical influences.
  • This indentation 32 is closed on the outside by a wall piece 34 of the second half-shell 13, the outer contour of which follows the outer contour of the meter housing 7.
  • the lid 15 is detachably connected to the two half-shells 11, 13.
  • the lid 15 has a rectangular base, which covers the interior.
  • a bore 33 is provided, are used in the screws, with which the lid 15 is screwed onto the two half-shells 11, 13.
  • corresponding threaded bores 35 are provided for receiving the screws.
  • an externally accessible user interface 37 of the flowmeter and / or a display 39 is integrated.
  • the user interface 37 comprises a membrane keyboard with buttons 41 which can be operated from the outside.
  • buttons 41 which can be operated from the outside.
  • optical buttons can also be used in conjunction with a transparent cover.
  • the display 39 is for example a commercially available display.
  • User interface 37 and display 39 are inside the
  • the meter electronics 9 is preferably arranged on a circuit board 43. As a result, a small height is effected, which allows to arrange the meter electronics 9 in an electronics compartment 23 with a very low height.
  • the board 43 has a rectangular base. The assembly of the board 43 is carried out by the board 43 is inserted into integrated into the outer walls of the first half-shell 11 guide rails 45. In the assembled state, the two edge areas of the board 43 arranged opposite one another on the two longitudinal sides of the board 43 run in the two mutually opposite identical guide rails 45.
  • the guide rails 45 and thus the circuit board 43 are arranged parallel to a the electronics space 23 facing lateral surface 47 of the octagonal in cross-section field jacket plate 4.
  • a plug contact 49 is provided, via which the meter electronics 9 can be connected to the sensor.
  • interface print is provided with a receiving socket 51, in which the plug contact 49 is inserted, and to which the sensor is connected. The electrical connection of the meter electronics 9 to the sensor then takes place automatically when installing the board 43, and is guided by the guide rails 45.
  • the flow meter according to the invention has the advantage that the lid 15 is releasably connected to the half-shells 11, 13. Corresponding is
  • the meter electronics 9 by a by removing the lid 15th resulting opening of the meter housing 7 through exchangeable. As a result, despite the compactness of the flowmeter a high degree of flexibility, esp. Given a possible maintenance or repair of the meter is given.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

L'invention propose un appareil compact et économique de mesure de débit par induction magnétique, qui présente un tube de mesure (1) dont l'espace intérieur est traversé par un fluide au cours d'une mesure, un enregistreur de mesure de débit par induction magnétique disposé sur le tube de mesure (1) et qui comprend un dispositif monté sur le tube de mesure (1) pour former un champ magnétique qui traverse le tube de mesure (1) et des électrodes (3) insérées dans le tube de mesure (1) et par lesquelles une tension induite au cours d'une mesure dans le fluide peut être prélevée, ainsi qu'un unique boîtier (7) d'appareil de mesure dans lequel sont disposés l'enregistreur de mesure et une électronique (9) de l'appareil de mesure, le boîtier étant constitué de deux demi-coquilles (11, 13) reliées l'une à l'autre, qui entourent le tube de mesure (1) et dans lequel une chambre (23) à électronique dans laquelle est disposée l'électronique (9) de l'appareil de mesure est prévue à l'extérieur du tube de mesure (1), une chambre de raccordement (25) disposée à l'extérieur du tube de mesure (1) débouchant dans la chambre (23) à électronique et contenant les conducteurs de raccordement (27) qui sont prolongés vers l'extérieur par un passage (31) inséré dans une paroi extérieure (29) de l'une des deux demi-coquilles (13) et qui sont raccordés à l'électronique (9) de l'appareil de mesure.
PCT/EP2008/057487 2007-06-26 2008-06-13 Appareil de mesure de débit par induction magnétique WO2009000679A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007029563.6 2007-06-26
DE102007029563.6A DE102007029563B4 (de) 2007-06-26 2007-06-26 Magnetisch induktives Durchflussmessgerät

Publications (1)

Publication Number Publication Date
WO2009000679A1 true WO2009000679A1 (fr) 2008-12-31

Family

ID=39897374

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/057487 WO2009000679A1 (fr) 2007-06-26 2008-06-13 Appareil de mesure de débit par induction magnétique

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DE (1) DE102007029563B4 (fr)
WO (1) WO2009000679A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011079351A1 (de) * 2011-07-18 2013-01-24 Endress + Hauser Flowtec Ag Magnetisch-induktives Durchflussmessgerät
DE102012110665A1 (de) * 2012-11-07 2014-05-08 Endress + Hauser Flowtec Ag Magnetisch-induktives Durchflussmessgerät und Anordnung
DE102012111275A1 (de) 2012-11-22 2014-05-22 Endress + Hauser Flowtec Ag Spulenkörperanordnung und Einrichtung zur magnetisch-induktiven Durchflussmessung
DE102014105569B3 (de) 2014-04-17 2015-08-20 Endress + Hauser Flowtec Ag Gehäuse für magnetisch induktives Durchflussmessgerät
DE102014106567A1 (de) * 2014-05-09 2015-11-12 Endress + Hauser Flowtec Ag Schnellmontage
DE102015107578B4 (de) 2015-05-13 2021-10-28 Endress + Hauser Flowtec Ag Magnetisch induktives Durchflussmessgerät und Verfahren zu dessen Herstellung
AT517707B1 (de) * 2016-01-29 2017-04-15 Avl List Gmbh Antriebs- und Steuervorrichtung für ein Durchflussmessgerät
DE102021118131A1 (de) 2021-07-14 2023-01-19 Endress + Hauser Flowtec Ag Feldgerät der Automatisierungstechnik

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3334518A (en) * 1963-09-30 1967-08-08 Hokushin Electric Works Transmitter for an electromagnetic flowmeter
DE3545155A1 (de) * 1984-12-26 1986-07-03 Kabushiki Kaisha Toshiba, Kawasaki, Kanagawa Elektromagnetischer durchflussmesser
US4631969A (en) * 1977-02-23 1986-12-30 Fischer & Porter Company Capacitance-type electrode assemblies for electromagnetic flowmeter
GB2269443A (en) * 1992-07-01 1994-02-09 Caledonian Control Technology Control for water heating systems
DE202005001549U1 (de) * 2005-02-01 2005-04-21 Abb Patent Gmbh Magnetisch-induktives Durchflussmessgerät

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4118981A (en) * 1977-06-24 1978-10-10 Arcadia Refining Company Flowmeter
US4428241A (en) * 1981-11-06 1984-01-31 Fischer & Porter Company Electrode wiring harness for magnetic flowmeter
GB2324606B (en) * 1997-04-25 2002-01-16 Kent Meters Ltd Electromagnetic flowmeter
DE102005002907A1 (de) * 2005-01-21 2006-07-27 Abb Patent Gmbh Magnetisch-induktives Durchflussmessgerät

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3334518A (en) * 1963-09-30 1967-08-08 Hokushin Electric Works Transmitter for an electromagnetic flowmeter
US4631969A (en) * 1977-02-23 1986-12-30 Fischer & Porter Company Capacitance-type electrode assemblies for electromagnetic flowmeter
DE3545155A1 (de) * 1984-12-26 1986-07-03 Kabushiki Kaisha Toshiba, Kawasaki, Kanagawa Elektromagnetischer durchflussmesser
GB2269443A (en) * 1992-07-01 1994-02-09 Caledonian Control Technology Control for water heating systems
DE202005001549U1 (de) * 2005-02-01 2005-04-21 Abb Patent Gmbh Magnetisch-induktives Durchflussmessgerät

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Publication number Publication date
DE102007029563B4 (de) 2022-02-24
DE102007029563A1 (de) 2009-01-02

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