DE10338208B4 - Magnetically inductive flow measuring device - Google Patents

Magnetically inductive flow measuring device Download PDF

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Publication number
DE10338208B4
DE10338208B4 DE2003138208 DE10338208A DE10338208B4 DE 10338208 B4 DE10338208 B4 DE 10338208B4 DE 2003138208 DE2003138208 DE 2003138208 DE 10338208 A DE10338208 A DE 10338208A DE 10338208 B4 DE10338208 B4 DE 10338208B4
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Germany
Prior art keywords
measuring device
flow measuring
inductive flow
measuring tube
liner
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Expired - Fee Related
Application number
DE2003138208
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German (de)
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DE10338208A1 (en
Inventor
Dieter Keese
Ralf Dipl.-Phys. Bäcker
Günter Dipl.-Ing. Rasche
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ABB AG Germany
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ABB Patent GmbH
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Priority to DE2003138208 priority Critical patent/DE10338208B4/en
Publication of DE10338208A1 publication Critical patent/DE10338208A1/en
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Publication of DE10338208B4 publication Critical patent/DE10338208B4/en
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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

Abstract

Magnetisch induktive Durchflussmesseinrichtung mit einem Messrohr (1) aus einem Verbundwerkstoff, dadurch gekennzeichnet, dass die Innenwandung des Messrohres (1) mit einem Liner (2) aus dem Thermoplasten Polyaryletherketon versehen ist.Magnetic inductive flow measuring device with a measuring tube (1) from a Composite material, characterized in that the inner wall of the measuring tube (1) with a liner (2) made of the thermoplastic polyaryletherketone is provided.

Figure 00000001
Figure 00000001

Description

Die Erfindung betrifft eine magnetisch induktive Durchflussmesseinrichtung, gemäß Oberbegriff des Patentanspruches 1.The The invention relates to a magnetic inductive flow measuring device, according to the preamble of Claim 1.

Messeinrichtungen der gattungsgemäßen Art enthalten Messrohre, an denen magnetisch induktive Systeme angeordnet sind, und über diese der Durchfluss durch eine Messrohr ermittelbar ist.measuring equipment of the generic type contain measuring tubes, arranged on which magnetic inductive systems are, and over this is the flow through a measuring tube can be determined.

Das Messrohr kann dabei unter Druck stehen, und so kommt regelmäßig die Druckgeräterichtlinie 97/23/EG zum Tragen. Dort sind nur noch zugelassene Werkstoffe für drucktragende Bauteile erlaubt.The Measuring tube can be under pressure, and so comes the regularly Pressure Equipment Directive 97/23 / EC. There are only approved materials for pressure-bearing Components allowed.

Aus diesem Grund sind Messrohre dieser Art zumeist aus Edelstahl, da dies ein zugelassener Werkstoff ist. Edelstahl kann aber in besonderen Anwendungsfällen von erheblichem Nachteil sein.Out For this reason, measuring tubes of this type are mostly made of stainless steel, since this is an approved material. But stainless steel can be special applications be of considerable disadvantage.

Aus der DE 19705436C2 sowie aus der DE 4302158C2 und aus der US 5664315A sind Durchflussmesseinrichtungen magnetisch induktiver Art bekannt, wobei das Messrohr jeweils aus einem Verbundwerkstoff besteht.From the DE 19705436C2 as well as from the DE 4302158C2 and from the US 5664315A are flow measuring devices of a magnetic inductive type known, wherein the measuring tube each consists of a composite material.

Die dort gewählten Materialien insbesondere der Innenauskleidung (Liner) sind nicht für alle Messfälle geeignet.The chosen there Materials, in particular the inner lining (liners) are not for all measuring cases suitable.

Der Erfindung liegt somit die Aufgabe zugrunde, eine gattungsgemäße magnetisch induktive Durchflussmesseinrichtung dahingehend weiterzuentwickeln, dass die genannte Druckgeräterichtlinie erfüllt aber gleichzeitig auch auf verschiedene Anwendungsfälle applizierte Materialverwendungen möglich sind.Of the Invention is therefore the object of a generic magnetic to further develop an inductive flow measuring device that the mentioned pressure equipment directive is fulfilled but At the same time applied to different applications, material uses are possible.

Die gestellte Aufgabe wird bei einer magnetisch induktiven Durchflussmesseinrichtung der gattungsgemäßen Art dahingehend gelöst, dass das Messrohr (1) aus einem Verbundwerkstoff besteht, derart, dass die Innenwandung mit einem Liner (2) aus dem Thermoplasten Polyaryletherketon versehen ist.The stated object is achieved in a magnetically inductive flow measuring device of the generic type to the effect that the measuring tube ( 1 ) consists of a composite material, such that the inner wall with a liner ( 2 ) is provided from the thermoplastic polyaryletherketone.

Auf diese Weise kann das Messrohr selbst aus einem die Druckgeräterichtlinie erfüllenden Material wie Edelstahl bestehen, aber auf der Innenoberfläche mit einer Beschichtung versehen sein, die perfekt auf den Anwendungsfall appliziert ist, selbst dann wenn das Beschichtungsmaterial nicht der Druckgeräterichtline entspricht. Das tragende Element bleibt nach wie vor beispielsweise Edelstahl.On this way, the measuring tube itself can from a pressure equipment directive fulfilling Material like stainless steel, but on the inside surface with a coating that is perfect for the application is applied, even if the coating material is not the pressure equipment directive equivalent. The load-bearing element still remains, for example Stainless steel.

In vorteilhafter Ausgestaltung besteht der Liner aus einer Schichtdicke von 0,1 bis 3 mm. Diese Schichtdicken sind je nach Anwendungsfall ausreichend, ohne die Durchgangsweite von Messrohren nenneswert zu schmälern.In Advantageous embodiment, the liner consists of a layer thickness from 0.1 to 3 mm. These layer thicknesses are depending on the application sufficient, without the Durchgangsweite of measuring tubes naming value to belittle.

Die Verwendung von Polyaryletherketon hat gegenüber fluorhaltigen Thermoplasten entscheidende Vorteile. Die Eigenstabilität von Polyaryletherketonen ist wesentlich höher als die von fluorhaltigen Thermoplasten. Das Schrumpfverhalten der Polyaryletherketone beim Abkühlen nach Einbringen in das drucktragende Rohr ist nicht nenneswert gegenüber dem Schrumpfverhalten von fluorhaltigen Thermoplasten. Somit kann auf teure Verfahren zum Verkrallen des Thermoplastes im Rohr verzichtet werden.The Use of polyaryletherketone has compared to fluorine-containing thermoplastics decisive advantages. The intrinsic stability of polyaryletherketones is much higher as that of fluorine-containing thermoplastics. The shrinkage behavior of Polyaryletherketone on cooling after introduction into the pressure-carrying pipe is not nameable in relation to the Shrinkage behavior of fluorine-containing thermoplastics. Thus, can up dispensed expensive process for clawing the thermoplastic in the pipe become.

Die Erfindung ist in der Zeichnung dargestellt.The Invention is shown in the drawing.

Die Zeichnung zeigt schematisch ein Messrohr 1 einer induktiven Durchflussmesseinrichtung. Das Messrohr besteht aus Edelstahl mit all seinen eingangs beschriebenen Vorteilen. Um eine nach freien Bedürfnissen gestaltbare Eigenschaft innerhalb des Messrohres 1 zu haben, ist die Innenwandung, die hier als verdeckte Innenlinie gestrichelt gezeichnet ist, mit einem erfindungsgemäßen Liner versehen (ebenfalls gestrichelt). Dieser Liner 2 ist aus einem Polyaryletherketon und erfüllt aseptische Anforderungen zum einen und lässt sich zum anderen auch leichter reinigen. Damit erreicht man auch eine Lebensmittelzulassung, FDA-Zulassung genannt.The drawing shows schematically a measuring tube 1 an inductive flow measuring device. The measuring tube is made of stainless steel with all its advantages described above. To a customizable properties within the measuring tube 1 to have, the inner wall, which is shown here as a hidden inner line dashed lines, provided with a liner according to the invention (also dashed). This liner 2 is made of a polyaryletherketone and meets aseptic requirements on the one hand and on the other hand also easier to clean. This also achieves a food approval, called FDA approval.

Die Aufbringung des Liners erfolgt durch spritzen oder sintern, oder bedampfen oder sputtern. Hierzu werden übliche Methoden angewendet.The Apply the liner by spraying or sintering, or steam or sputter. For this purpose, usual methods are used.

Claims (2)

Magnetisch induktive Durchflussmesseinrichtung mit einem Messrohr (1) aus einem Verbundwerkstoff, dadurch gekennzeichnet, dass die Innenwandung des Messrohres (1) mit einem Liner (2) aus dem Thermoplasten Polyaryletherketon versehen ist.Magnetically inductive flow measuring device with a measuring tube ( 1 ) made of a composite material, characterized in that the inner wall of the measuring tube ( 1 ) with a liner ( 2 ) is provided from the thermoplastic polyaryletherketone. Magnetisch induktive Durchflussmesseinrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Liner (2) eine Schichtdicke von 0,1 bis 3 mm aufweist.Electromagnetic flow measuring device according to claim 1, characterized in that the liner ( 2 ) has a layer thickness of 0.1 to 3 mm.
DE2003138208 2003-08-20 2003-08-20 Magnetically inductive flow measuring device Expired - Fee Related DE10338208B4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2003138208 DE10338208B4 (en) 2003-08-20 2003-08-20 Magnetically inductive flow measuring device

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DE10338208B4 true DE10338208B4 (en) 2006-02-09

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4302158C2 (en) * 1993-01-27 1996-07-11 Turbo Werk Messtechnik Gmbh Magnetic-inductive flow meter
US5664315A (en) * 1995-09-22 1997-09-09 Endress + Hauser Flowtec Ag Process for manufacturing a measuring tube of an electromagnetic flow sensor
DE19705436C2 (en) * 1996-02-16 1999-10-21 Danfoss Flowmetering Ltd Measuring tube arrangement for electromagnetic flow meters and method for their production
WO2002071003A1 (en) * 2001-03-07 2002-09-12 Spanner-Pollux Gmbh Converter for ultrasound flowmeter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4302158C2 (en) * 1993-01-27 1996-07-11 Turbo Werk Messtechnik Gmbh Magnetic-inductive flow meter
US5664315A (en) * 1995-09-22 1997-09-09 Endress + Hauser Flowtec Ag Process for manufacturing a measuring tube of an electromagnetic flow sensor
DE19705436C2 (en) * 1996-02-16 1999-10-21 Danfoss Flowmetering Ltd Measuring tube arrangement for electromagnetic flow meters and method for their production
WO2002071003A1 (en) * 2001-03-07 2002-09-12 Spanner-Pollux Gmbh Converter for ultrasound flowmeter

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OP8 Request for examination as to paragraph 44 patent law
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: ABB AG, 68309 MANNHEIM, DE

R119 Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee

Effective date: 20130301