DE3340103A1 - Measuring sensor for magnetoinductive flow meters - Google Patents

Measuring sensor for magnetoinductive flow meters

Info

Publication number
DE3340103A1
DE3340103A1 DE19833340103 DE3340103A DE3340103A1 DE 3340103 A1 DE3340103 A1 DE 3340103A1 DE 19833340103 DE19833340103 DE 19833340103 DE 3340103 A DE3340103 A DE 3340103A DE 3340103 A1 DE3340103 A1 DE 3340103A1
Authority
DE
Germany
Prior art keywords
measuring tube
measuring
flanges
flow meters
steel housing
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.)
Ceased
Application number
DE19833340103
Other languages
German (de)
Inventor
Lukas Culemborg Ijmker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Krohne Messtechnik GmbH and Co KG
Original Assignee
Krohne Messtechnik GmbH and Co KG
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 Krohne Messtechnik GmbH and Co KG filed Critical Krohne Messtechnik GmbH and Co KG
Priority to DE19833340103 priority Critical patent/DE3340103A1/en
Publication of DE3340103A1 publication Critical patent/DE3340103A1/en
Ceased legal-status Critical Current

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

Abstract

In a measuring sensor for magnetoinductive flow meters, consisting of an electrically insulating measuring tube (1) which, arranged in a steel housing (4), is provided on two diametrically opposite sides with measuring electrodes (3), which are led radially through the circumferential surface of the measuring tube (1) and are mounted thereon, at its ends with flanges (2), as well as with magnet coils (7) arranged on the circumferential surface, a measuring tube (1) made from a flexible material made from plastic or rubber is provided for use with liquids which contain abrasion-producing solid particles, in order to improve the abrasion resistance. The steel housing (4) consists of two housing parts (5, 6) which can be laid around the measuring tube (1) and fixed to one another. <IMAGE>

Description

Meßwertaufnehmer für magnetisch-induktive DurchflußmeßgeräteTransducer for magnetic-inductive flowmeters

Die Erfindung betrifft einen Meßwertaufnehmer für magnetisch-induktive Durchflußmeßgeräte, bestehend aus einem elektrisch isolierenden Meßrohr, welches in einem Stahlgehäuse angeordnet, an zwei diametral gegenüberliegenden Seiten mit Meßelektroden, die radial durch den Mantel des Meßrohres führen und an diesem befestigt sind, an seinen Enden mit Flanschen sowie mit auf dem Mantel angeordneten Magnetspulen versehen ist.The invention relates to a transducer for magneto-inductive Flow meters, consisting of an electrically insulating measuring tube, which arranged in a steel case, on two diametrically opposite sides with Measuring electrodes, which lead radially through the jacket of the measuring tube and attached to it are, at its ends with flanges and with magnetic coils arranged on the jacket is provided.

Bestandteil magnetisch-induktiver Durchflußmeßgeräte ist ein rohrförmiger Meßwertaufnehmer, der zwischen den Anschlußflanschen einer Rohrleitung befestigt wird und durch den eine leitfähige Flüssigkeit quer zur Richtung eines Magnetfeldes strömt. Die der Strömungsgeschwindigkeit proportionale Spannung wird an zwei Meßelektroden abgegriffen und über Stromleiter einem Meßwertumformer zugeführt.A tubular component is a component of magnetic-inductive flowmeters Measuring sensor that is attached between the connection flanges of a pipeline and through which a conductive liquid transverse to the direction of a magnetic field flows. The voltage proportional to the flow velocity is applied to two measuring electrodes tapped and fed to a transducer via current conductors.

In der Regel besteht das Meßrohr des Meßwertaufnehmers aus einem Kunststoffrohr oder einem Metallrohr, dessen Innenmantel mit einer elektrisch isolierenden Beschichtung versehen ist. Aus der US-A 3 750 468 ist eine Ausführung bekannt, bei der in ein Meßrohr aus Titan als Isolierschicht ein dünnes Rohr aus Aluminiumoxid eingeschrumpft ist und metallische Elektroden mit einem Dichtungsring in eine Bohrung eingesetzt sind, wobei deren Rückfläche an einer metallisierten Fläche des Aluminiumoxidrohres angeschweißt ist. Das die Magnetspulen enthaltende Stahlgehäuse besteht aus zwei schalenförmig um das Meßrohr legbare und aneinander verschraubbaren Teilen. Ein aus einem harten Kunststoff oder Metallrohr bestehendes Meßrohr üblicher Bauart ist jedoch für Flüssigkeiten, die harte und/oder scharfkantige Feststoffteilchen enthalten, z. B. in Baggerbetrieben durch Leitungen gepumptes Wasser mit Kies, Sand u. dgl., wegen des starken Abriebs nicht geeignet. Schon nach relativ kurzer Betriebszeit ist das Meßrohr verschlissen, wobei auch die Meßelektroden dem Abrieb ausgesetzt sind.As a rule, the measuring tube of the transducer consists of a plastic tube or a metal pipe whose inner jacket has an electrically insulating coating is provided. From US-A 3 750 468 a design is known in which in a Measuring tube made of titanium as an insulating layer a thin tube made of alumina is shrunk and metallic electrodes with a sealing ring in a bore are used, with their rear surface on a metallized surface of the aluminum oxide tube is welded on. The steel housing containing the solenoids consists of two Parts that can be placed around the measuring tube in a shell shape and screwed together. A A measuring tube of conventional design consisting of a hard plastic or metal tube However, it is suitable for liquids that contain hard and / or sharp-edged solid particles included, e.g. B. in dredging companies through pipes pumped water with gravel, sand and the like, not suitable because of the strong abrasion. Already after a relatively short operating time If the measuring tube is worn out, the measuring electrodes are also exposed to abrasion are.

Auch bei Meßrohren, die mit abriebsfesteren dicken Auskleidungen versehen sind, lassen sich nur relativ kurze Betriebszeiten erzielen. Ein Ersatzeinbau ist zeitraubend und kostspielig.Even with measuring tubes that have thick linings that are more resistant to abrasion only relatively short operating times can be achieved. A replacement installation is time consuming and costly.

Demgegenüber liegt der Erfindung die Aufgabe zugrunde, einen Meßwertaufnehmer der gattungsgemäßen Art derart auszubilden, daß bei Verwendung für Flüssigkeiten, welche Abrieb bewirkende Feststoffteilchen enthalten, eine lange Betriebsdauer erzielt und insbesondere ein schneller und preiswerter Ersatzeinbau möglich ist.In contrast, the object of the invention is to provide a measured value transducer of the generic type in such a way that when used for liquids, which contain abrasive solid particles, achieves a long service life and in particular a quick and inexpensive replacement installation is possible.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Meßrohr aus einem flexiblen Werkstoff aus Kunststoff oder Gummi und das Stahlgehäuse aus zwei oder mehreren um das Meßrohr legbaren und verspannbaren Gehäuseteilen besteht.This object is achieved according to the invention in that the measuring tube made of a flexible material made of plastic or rubber and the steel housing consists of two or more housing parts that can be placed and braced around the measuring tube.

Die Verwendung eines flexiblen Werkstoffs, z. B. synthetischer oder natürlicher Kautschuk, für das Meßrohr gewährleistet eine bestmögliche Abriebsfestigkeit. Ein etwa erforderlicher Ersatzeinbau ist einfach und schnell an der Arbeitsstätte möglich. Nach dem Abbau der Gehäuseteile läßt sich das eingebaute Meßrohr an seinen Flanschen lösen und durch ein neues Meßrohr ersetzen. Da auch die Flansche aus dem flexiblen Material bestehen, wird gleichfalls eine gute Abdichtung der Leitung erzielt. Mit den angegossenen Flanschen und eingegossenen Elektroden ist das Meßrohr besonders preiswert.The use of a flexible material, e.g. B. synthetic or Natural rubber, for the measuring tube guarantees the best possible abrasion resistance. Any necessary replacement installation is quick and easy at the workplace possible. After dismantling the housing parts the built-in Loosen the measuring tube at its flanges and replace with a new measuring tube. There too the flanges made of the flexible material will also provide a good seal achieved on the line. With the cast-on flanges and cast-in electrodes the measuring tube is particularly inexpensive.

Ein Ausführungsbeispiel zeigt Fig. 1 in einer Seitenansicht, teilweise geschnitten und Fig. 2 in einem mittleren Querschnitt.An exemplary embodiment is shown in FIG. 1 in a side view, partially section and Fig. 2 in a middle cross section.

Das Meßrohr 1 besteht aus einem Rohrstück bzw. Schlauchstück aus flexiblem Gummi oder Kunststoff, z. B. Neopren, an welches Flansche 2 angegossen und in welches an zwei diametral gegenüberliegenden Seiten je eine Meßelektrode 3 eingegossen ist. Das Meßrohr 1 wird mit seinen Flanschen 2 an entsprechende Flansche eines Leitungsrohres angeschlossen.The measuring tube 1 consists of a pipe section or hose section made of flexible Rubber or plastic, e.g. B. neoprene, to which flanges 2 cast and in which A measuring electrode 3 is cast in each case on two diametrically opposite sides. The measuring tube 1 is with its flanges 2 on corresponding flanges of a conduit pipe connected.

Um dem Meßrohr 1 eine größere Steifigkeit zu geben, können Armierungsbänder oder -fäden aus nichtmagnetischem Material eingebettet sein.In order to give the measuring tube 1 greater rigidity, reinforcement tapes can be used or threads made of non-magnetic material be embedded.

Das Stahl gehäuse 4 besteht aus zwei schalenförmigen Teilen 5,6, welche die Magnetspulen 7 enthalten, um das Meßrohr 1 legbar und mittels flanschartiger Stege 8 und Bolzen o. dgl.The steel housing 4 consists of two shell-shaped parts 5,6 which contain the magnetic coils 7 to be able to be placed around the measuring tube 1 and by means of flange-like Web 8 and bolts or the like.

aneinander befestigbar sind. Der Aufbau und die lösbare Befestigung ist so ausgeführt, daß ein schneller Ab- und Anbau möglich ist.are attachable to each other. The structure and the detachable attachment is designed so that it can be removed and attached quickly.

Claims (2)

Patentansprüche i 1.)Meßwertaufnehmer für magnetisch-induktive Durchflußmeßgeräte, bestehend aus einem elektrisch isolierenden Meßrohr, welches in einem Stahlgehäuse angeordnet, an zwei diametral gegenüberliegenden Seiten mit Meßelektroden, die radial durch den Mantel des Meßrohres führen und an diesem befestigt sind, an seinen Enden mit Flanschen sowie mit auf dem Mantel angeordneten Magnetspulen versehen ist, dadurch gekennzeichnet, daß das Meßrohr (1) aus einem flexiblen Werkstoff aus Kunststoff oder Gummi besteht und das Stahlgehäuse (4) aus zwei oder mehreren um das Meßrohr (1) legbaren, aneinander befestigbaren Gehäuseteilen (5,6) besteht. Claims i 1.) transducers for magnetic-inductive flowmeters, consisting of an electrically insulating measuring tube, which is in a steel housing arranged on two diametrically opposite sides with measuring electrodes that are radially pass through the jacket of the measuring tube and are attached to it at its ends is provided with flanges and with magnetic coils arranged on the jacket, thereby characterized in that the measuring tube (1) is made of a flexible material made of plastic or rubber and the steel housing (4) consists of two or more around the measuring tube (1) housing parts (5, 6) which can be laid down and fastened to one another. 2. Meßwertaufnehmer nach Anspruch 1, dadurch gekennzeichnet, daß das Meßrohr (1) mit Armierungsbändern oder -fäden aus nichtmagnetischem Material versehen ist. 2. transducer according to claim 1, characterized in that the measuring tube (1) with reinforcement tapes or threads made of non-magnetic material is provided.
DE19833340103 1983-11-05 1983-11-05 Measuring sensor for magnetoinductive flow meters Ceased DE3340103A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19833340103 DE3340103A1 (en) 1983-11-05 1983-11-05 Measuring sensor for magnetoinductive flow meters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19833340103 DE3340103A1 (en) 1983-11-05 1983-11-05 Measuring sensor for magnetoinductive flow meters

Publications (1)

Publication Number Publication Date
DE3340103A1 true DE3340103A1 (en) 1985-05-23

Family

ID=6213592

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19833340103 Ceased DE3340103A1 (en) 1983-11-05 1983-11-05 Measuring sensor for magnetoinductive flow meters

Country Status (1)

Country Link
DE (1) DE3340103A1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3730641A1 (en) * 1987-09-11 1989-03-30 Flowtec Ag Method of the producing a magnetic-inductive measuring tube
US4901583A (en) * 1987-11-30 1990-02-20 Vedeckovyzkumy Uhelny Ustav Electromagnetic pick-up device for measuring volume flows of thick, highly abrasive suspensions
US5280727A (en) * 1987-09-11 1994-01-25 Endress+Hauser Flowtec Ag Electromagnetic flow measuring tube and method of making same
DE10046195A1 (en) * 2000-09-19 2002-04-04 Danfoss As Integrated component for induction flow meter tube has outer ends of material with lower modulus of elasticity than centre
GB2385667A (en) * 2002-02-26 2003-08-27 Danfoss As Insert for an inductive flowmeter
GB2411236A (en) * 2004-02-20 2005-08-24 Abb Ltd Electromagnetic flow meter insert
GB2422675A (en) * 2005-02-01 2006-08-02 Abb Patent Gmbh Flow meter with detachable coils
DE102006060442A1 (en) * 2006-12-19 2008-06-26 Endress + Hauser Flowtec Ag Device for measuring volumetric or mass flow rate of medium in pipeline, has magnet system assembled as module, which consists of core, body and coil and module is so dimensioned and developed that it is laterally arranged on measuring tube
DE102007061798A1 (en) * 2007-12-19 2009-06-25 Endress + Hauser Flowtec Ag Magnetically inductive flow measuring system for e.g. monitoring flow of measuring medium through measuring tube, has adjustment unit exchanged for adjusting magnetic field and/or flexibly designed in its shape and/or size
DE102014106567A1 (en) * 2014-05-09 2015-11-12 Endress + Hauser Flowtec Ag Quick installation

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3730641A1 (en) * 1987-09-11 1989-03-30 Flowtec Ag Method of the producing a magnetic-inductive measuring tube
US5280727A (en) * 1987-09-11 1994-01-25 Endress+Hauser Flowtec Ag Electromagnetic flow measuring tube and method of making same
US4901583A (en) * 1987-11-30 1990-02-20 Vedeckovyzkumy Uhelny Ustav Electromagnetic pick-up device for measuring volume flows of thick, highly abrasive suspensions
DE10046195A1 (en) * 2000-09-19 2002-04-04 Danfoss As Integrated component for induction flow meter tube has outer ends of material with lower modulus of elasticity than centre
DE10046195C2 (en) * 2000-09-19 2002-11-21 Danfoss As Use for a measuring tube of an inductive flow meter
US6877386B2 (en) 2002-02-26 2005-04-12 Siemens Flow Instruments A/S Insert for a measuring tube of an inductive flowmeter
GB2385667A (en) * 2002-02-26 2003-08-27 Danfoss As Insert for an inductive flowmeter
GB2411236A (en) * 2004-02-20 2005-08-24 Abb Ltd Electromagnetic flow meter insert
GB2411236B (en) * 2004-02-20 2007-10-17 Abb Ltd Electromagnetic flow meter insert
US7930816B2 (en) 2004-02-20 2011-04-26 Abb Limited Methods for manufacturing flow meter insert
GB2422675A (en) * 2005-02-01 2006-08-02 Abb Patent Gmbh Flow meter with detachable coils
GB2422675B (en) * 2005-02-01 2009-12-09 Abb Patent Gmbh Magnetoinductive flowmeter
DE102006060442A1 (en) * 2006-12-19 2008-06-26 Endress + Hauser Flowtec Ag Device for measuring volumetric or mass flow rate of medium in pipeline, has magnet system assembled as module, which consists of core, body and coil and module is so dimensioned and developed that it is laterally arranged on measuring tube
DE102007061798A1 (en) * 2007-12-19 2009-06-25 Endress + Hauser Flowtec Ag Magnetically inductive flow measuring system for e.g. monitoring flow of measuring medium through measuring tube, has adjustment unit exchanged for adjusting magnetic field and/or flexibly designed in its shape and/or size
DE102014106567A1 (en) * 2014-05-09 2015-11-12 Endress + Hauser Flowtec Ag Quick installation

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