WO2022128419A1 - Magnetisch-induktives durchflussmessgerät - Google Patents
Magnetisch-induktives durchflussmessgerät Download PDFInfo
- Publication number
- WO2022128419A1 WO2022128419A1 PCT/EP2021/083227 EP2021083227W WO2022128419A1 WO 2022128419 A1 WO2022128419 A1 WO 2022128419A1 EP 2021083227 W EP2021083227 W EP 2021083227W WO 2022128419 A1 WO2022128419 A1 WO 2022128419A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- measuring tube
- measuring
- conductor
- tube body
- conductors
- Prior art date
Links
- 239000004020 conductor Substances 0.000 claims abstract description 99
- 238000012806 monitoring device Methods 0.000 claims abstract description 27
- 230000005291 magnetic effect Effects 0.000 claims abstract description 16
- 239000000853 adhesive Substances 0.000 claims description 9
- 230000001070 adhesive effect Effects 0.000 claims description 9
- 230000001419 dependent effect Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 15
- 238000005299 abrasion Methods 0.000 description 17
- 238000012544 monitoring process Methods 0.000 description 8
- 239000012777 electrically insulating material Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000010363 phase shift Effects 0.000 description 2
- 229920001875 Ebonite Polymers 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 239000002318 adhesion promoter Substances 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
Definitions
- the invention relates to a magnetic-inductive flowmeter with a monitoring device that is set up to determine damage to the measuring tube body.
- Electromagnetic flowmeters are used to determine the flow rate and volume flow of a flowing medium in a pipeline.
- a magneto-inductive flowmeter has a magnet system that generates a magnetic field perpendicular to the flow direction of the flowing medium. Individual coils, more rarely permanent magnets, are usually used for this.
- additional pole shoes are formed and attached to the measuring tube in such a way that the magnetic field lines run essentially perpendicular to the transverse axis or parallel to the vertical axis of the measuring tube over the entire tube cross section.
- a pair of measuring electrodes attached to the lateral surface of the measuring tube picks up an electrical measuring voltage or potential difference in the medium perpendicular to the direction of flow and to the magnetic field, which arises when a conductive medium flows in the direction of flow with an applied magnetic field. Since the measured voltage depends on the speed of the flowing medium according to Faraday's law of induction, the flow rate u and, with the addition of a known pipe cross-section, the volume flow V can be determined from the induced measuring voltage U.
- Electromagnetic flowmeters are widely used in process and automation technology for fluids with an electrical conductivity of around 5 pS/cm.
- Corresponding flow measuring devices are sold by the applicant in a wide variety of embodiments for different areas of application, for example under the name PROMAG.
- DE 10 2005 044 972 A1 and DE 10 2004 062 680 A1 each describe magneto-inductive sensors that have a measuring tube that can be inserted into a pipeline, has a first end on the inlet side and a second end on the outlet side, with a non-ferromagnetic support tube ais an outer covering of the measuring tube, and a tubular lining, which is accommodated in a lumen of the carrier tube and consists of an electrically insulating material, for guiding a flowing measuring substance which is electrically insulated from the carrier tube.
- the lining which usually consists of a thermoplastic, duroplastic and/or elastomeric plastic, is used, among other things, to chemically insulate the carrier tube from the medium to be measured.
- the lining also serves to provide electrical insulation between the carrier tube and the medium, which prevents the voltage induced in the medium from short-circuiting via the carrier tube.
- a perforated tube welded to the support tube serves as a support body.
- the support body is connected to the support tube and embedded in the liner by applying the material from which the liner is made to the inside of the support tube.
- a measuring tube with a metal housing has become known from US Pat. No. 4,513,624 A for mechanical stabilization and for electrical shielding.
- the metal housing encloses a pipeline carrying the medium specifically for this purpose.
- magnetic-inductive flowmeters which have a measuring tube body made of an electrically insulating material--for example plastic, ceramic and/or glass. Such measuring tubes do not have an insulating coating.
- the electrically insulating lining but also the measuring tube body formed from an electrically insulating material, is subject to erosion despite the use of hard-wearing materials.
- media that carry solid particles - such as sand, gravel and/or rock - cause abrasion of the lining of the pipeline or the body of the measuring tube.
- the flow profile of the sensor changes as a result of abrasion or deformation of the lining or the electrically insulating measuring tube body.
- the measuring device delivers incorrect measured values for the volume or mass flow.
- the chemical or electrical insulation between the medium to be measured and the carrier tube is lost in the case of measuring tubes with a lining on the inside.
- WO 2010/066518 A1 discloses a measuring device for determining a volume and/or mass flow rate of a measured substance flowing through a measuring tube.
- That Measuring tube comprises a carrier tube with an inner lining comprising a first layer and a second layer, and a monitoring electrode which is embedded between the first layer and the second layer and is configured to detect damage to the second/first layer.
- the disadvantage of this, however, is that the monitoring influences the measurement of the volume and/or mass flow.
- the present invention is therefore based on the object of providing an alternative solution for a magneto-inductive flowmeter with which damage to the lining and/or the electrically insulating measuring tube body due to abrasion can be detected without impairing the measuring performance.
- the magnetic-inductive flow meter comprises:
- a measuring tube for conducting a medium in a flow direction, the measuring tube comprising a measuring tube body which is designed to be electrically insulating in sections, the measuring tube body enclosing a measuring tube volume, in which the medium is to be guided, perpendicular to the flow direction;
- the monitoring device for detecting damage to the measuring tube body, the monitoring device comprising at least one electrically conductive conductor, the conductor being separated at least in sections from the measuring tube volume by an area of the measuring tube body when the measuring tube body is intact, the monitoring device comprising a measuring circuit, wherein the measuring circuit is electrically connected to the at least one conductor and is set up to measure measured values of a measured variable that is dependent at least on an impedance of the at least one conductor, the measuring circuit being set up to compare the measured values with a reference value or a desired value range.
- the present solution monitors the impedance of the conductor and, based on a change in impedance (i.e. e.g. the electrical resistance, the phase shift between the excitation and measurement signal, the inductance or the capacitance of the conductor) towards a defect in the measuring tube body shut down.
- the impedance can only be the impedance of the electrical conductor or the impedance of the electrical conductor and other electrical components.
- the electrical conductor is preferably electrically connected exclusively to the measuring circuit when the measuring tube body is intact
- the measuring tube body comprises a carrier tube with an inner lateral surface, the measuring tube body comprising an electrically insulating liner, the liner being arranged on the inner lateral surface of the carrier tube, the at least one conductor being embedded in the liner at least in sections and is electrically isolated from the medium to be fed.
- the liner comprises a layer system made up of at least two layers, the at least one conductor being arranged at least in sections between the two layers.
- the layer system advantageously includes layers of hard rubber mats or natural rubber mats.
- the layer system can be formed by applying a liquid casting compound several times.
- One embodiment provides that the at least two layers are bonded to one another at least in sections by means of an adhesive, wherein the at least one conductor has openings, at least in sections, through which the adhesive extends.
- the advantage of the configuration lies in the fact that the adhesion between the layers is improved and the formation of bubbles between the at least two layers is avoided.
- the at least one conductor extends at least in an inlet section and an outlet section of the measuring tube.
- the at least one conductor extends at least in sections in the form of a loop or a helix along the measuring tube body.
- the loop-like or helical arrangement of the conductor means that a larger inner lateral surface is covered by the at least one conductor and thus the probability that an abrasion that forms will hit a section of the at least one conductor increases and thus also the probability of detection.
- the monitoring device comprises at least two conductors, the at least two conductors each having a support tube spacing d T , the support tube spacing d T differing from one another at least in one measuring tube section.
- a degree of abrasion can be derived by using at least two conductors, which in some sections are at different distances from a lateral surface of the measuring tube body and thus also from the medium to be conveyed. If the inner conductor is severed due to abrasion, this affects the measured values determined. In this state, there is a first degree of abrasion, which, however, allows an error-free measurement of the flow rate-dependent measured variable. If the outer conductors are also severed, then there is a further, in particular final degree of abrasion, which indicates a repair or replacement of the liner. The measuring circuit is set up to determine a degree of abrasion as a function of the measured values determined.
- One embodiment provides that the at least two conductors are connected to one another at least via a passive electrical component with an electrical impedance. This has the technical effect that no short-circuit occurs when the conductor comes into contact with the medium, which could have a significant impact on the flow measurement.
- the measuring circuit is connected via two measuring points on the component and via two further measuring points to the ends of the at least two conductors, with the four measuring points being able to be measured through the measuring circuit against one another.
- the monitoring device comprises at least four conductors, with two conductors of the at least four conductors being connected to one another via a single passive electrical component, with the at least four conductors being connected to the measuring circuit, with the measured values determined from the impedance of the at least four conductors and the at least two components.
- the monitoring device has at least two passive electrical components, each with an electrical impedance, the at least two components being connected in series or in parallel to one another via the at least two conductors.
- the monitoring device includes a multiplexer, the multiplexer being set up to switch through between the at least two conductors.
- FIG. 1 shows a cross section through a first embodiment of the magnetic-inductive flowmeter according to the invention
- FIG. 2 a perspective, partially sectioned perspective of two configurations of the monitoring device
- FIG. 3 shows a cross section through a second embodiment of the magnetic-inductive flowmeter according to the invention
- 4 a perspective perspective of a further embodiment of the monitoring device
- FIG. 5 shows a cross section through a magnetic-inductive flowmeter according to the prior art
- FIG. 6 shows a cross section through a third embodiment of the magnetic-inductive flowmeter according to the invention.
- Figs. 7A-B Views of conductor designs.
- a measuring tube 2 for conducting a medium in a direction of flow has a measuring tube body which is designed to be electrically insulating in sections and which encloses a measuring tube volume, in which the medium is to be routed, perpendicular to the direction of flow.
- the measuring tube body comprises a metal carrier tube 3 and a liner 4 made of an electrically insulating material and arranged on an inner lateral surface of the carrier tube 3 .
- the entire measuring tube body can be formed from a plastic - e.g. as a cast part - and the conductor 7 can be cast at least partially in the measuring tube body.
- a monitoring device 6 for detecting damage to the measuring tube body with at least one or precisely one electrically conductive conductor 7 is at least partially embedded in the liner 4 and, if the measuring tube body is intact, is at least partially separated from the measuring tube volume or from the medium to be conveyed by a region of the measuring tube body electrically isolated.
- the conductor 7 is designed to be electrically insulating with respect to the electrically conductive support tube 3 .
- the monitoring device 6 comprises a measuring circuit 11 which is electrically connected to the at least one conductor 7 and is set up to measure measured values of a measured variable which is at least dependent on an impedance of the at least one conductor. The measured values are then compared with a reference value or a desired value range via the measuring circuit.
- the conductor 7 is arranged in the liner 4 at least partially in a circle.
- a warning for the operator of the magneto-inductive flow measuring device is preferably created.
- FIG. 2 shows a perspective, partially sectioned perspective of two configurations of the monitoring device.
- One embodiment shows exactly one conductor 7, which is arranged in a support tube 3, shown partially in section.
- the support tube 3 can be formed from an electrically insulating plastic and the conductor 7 extends on an inner lateral surface of the support tube 3.
- the conductor 7 extends from an opening to an inlet section, where it extends along the inner lateral surface and the inner circumference of the support tube 3 . From the inlet section, the conductor 7 continues in the longitudinal direction of the support tube 3 to an outlet section, where it extends along the inner lateral surface and the inner circumference of the support tube 3 and assumes an at least partially circular shape. From the outlet section, the conductor 7 runs in the direction of the opening.
- the conductor 7 is designed as a wire.
- the first embodiment is very simple, inexpensive and easy to implement.
- locally resolved defects cannot be resolved by abrasion if they are only located between the inlet section and outlet section.
- the measurements on the conductor 7 have only a very small influence on the flow rate-dependent induced voltage.
- the second embodiment differs from the first embodiment essentially in the shape and arrangement of the conductor.
- the liner and/or the support tube are not shown.
- the conductor 7 is in the form of a strip, i.e. it has a width and a height, the width being greater than the height.
- the conductor 7 extends at least in sections in the form of a loop or a helix along the measuring tube body. This covers a larger section of the measuring tube in which abrasion can be detected.
- the measured values can be electrical resistances of the conductor 7 or impedances, which are determined with a time-varying excitation signal. Alternatively, the phase shift between the excitation signal and the measurement signal can be used as a measured value for determining abrasion.
- the measuring circuit can be set up to determine the presence of abrasion based on the determined inductance or the capacitance of the conductor 7 .
- the monitoring device has at least, in particular precisely, two conductors 7.1, 7.2 in addition to the measuring circuit 11.
- the two conductors 7.1, 7.2 either each have an electrical impedance that is selected such that the measured value determined by means of the measuring circuit 11 does not fall outside the setpoint range in the event of media contact, but only when the conductor 7 is subjected to abrasion.
- the two conductors 7.1 , 7.2 are connected separately to the measuring circuit 11 or, alternatively, as shown, connected to one another via two nodes and only then to the measuring circuit.
- the at least two conductors 7.1, 7.2 can be connected to one another at least via one, in particular precisely one, passive electrical component 12 with an electrical impedance or a plurality of electrical components 12.1, 12.2, each with an electrical impedance.
- the components 12.1, 12.2 are connected in series or in parallel with one another.
- the at least two conductors 7.1, 7.2 each have different conductors, at least in sections Carrier tube distances d T.
- the monitoring device can include four conductors 7.1, 7.2, 7.3, 7.4 and two components 12.1, 12.2, which are each electrically connected to at least two of the four conductors 7.1, 7.2, 7.3, 7.4 and can be measured by the measuring circuit.
- the measured values determined by means of the measuring circuit depend—with an intact measuring tube body—on the impedance of the four conductors 7.1, 7.2, 7.3, 7.4 and the at least two electrical components 12.1, 12.2. If one of the four conductors 7.1, 7.2, 7.3, 7.4 is damaged by abrasion, this affects the measured values determined and a warning is issued.
- FIG. 4 shows a perspective perspective of a further embodiment of the monitoring device, which essentially differs from the first embodiment of FIG. 2 in the number of loops through which at least one, in particular precisely one, conductor 7 runs.
- the conductor extends at least three times from the inlet section 10 to the outlet section 11 of the measuring tube, spanning at least three circle sectors in the inlet section 10 and in the outlet section 11 respectively.
- two electrical components 12.1, 12.2 with stored impedances as reference values can be connected in series to the conductor 7.
- FIG. 5 shows a magneto-inductive flow meter 1 known from the prior art.
- the design and the measuring principle of a magneto-inductive flow meter 1 are known in principle.
- a medium which has electrical conductivity is passed through a measuring tube 2 .
- the measuring tube 2 can be designed, for example, as a support tube made of metal with a lining applied on the inside, or have a measuring tube body that is essentially made of an electrically insulating material such as plastic, ceramic, glass and/or concrete.
- a device 5 for generating a magnetic field is attached to the measuring tube 2 in such a way that the magnetic field lines are oriented essentially perpendicular to a longitudinal direction defined by a measuring tube axis.
- a saddle coil or a pole shoe with an attached coil and coil core is preferably suitable as the device 5 for generating the magnetic field.
- a flow-dependent potential distribution occurs in the measuring tube 2, which is tapped off with a device 8 for detecting an induced voltage, preferably with two measuring electrodes mounted opposite one another on the inner wall of the measuring tube 2.
- these are arranged diametrically and form an electrode axis or are intersected by a transverse axis that runs perpendicular to the magnetic field lines and the measuring tube axis.
- the volume flow of the medium can be determined.
- the inner wall of the support tube is covered with an electrically insulating lining - a so-called liner.
- the magnetic field built up by the device 5, for example an electromagnet is generated by a direct current of alternating polarity which is pulsed by means of an operating circuit. This ensures a stable zero point and makes the measurement insensitive to the influence of electrochemical interference.
- a measurement circuit 23 is set up to read out the measurement voltage present at the first measurement electrode and the second measurement electrode.
- An evaluation circuit is set up to determine the flow rate and/or the volume flow of the medium and to output this to the user via a display 38, for example.
- a fill level monitoring electrode (not shown in Fig. 5), which is optimally attached to the highest point in the measuring tube 2, is used to detect a partial filling of the measuring tube 2 and is set up to forward this information to the user and/or to monitor the fill level when determining the volume flow into account.
- a reference electrode 33 which is usually attached diametrically to the fill level monitoring electrode or at the lowest point of the pipe cross section, serves to ensure adequate grounding of the medium to be conducted.
- Fig. 6 shows a cross section through a third embodiment of the magnetic-inductive flowmeter according to the invention, which differs essentially from the embodiment of Fig. 1 in that the liner 4 comprises a layer system of at least two layers 14.1, 14.2 and the at least one conductor 7 is arranged at least in sections between the two layers.
- a first layer, to which a further layer of the layer system is applied, can preferably be primed with an adhesion promoter.
- An adhesive in particular a liquid adhesive, is used so that the layers remain connected to one another. In that case it is advantageous if the conductor ? Has openings in which the adhesive can extend, so that no air bubbles form when the layers are bonded.
- Figs. 7A and 7B show views of configurations of the conductor 7.
- the conductor 7 can be formed by a cable or a wire. If the conductor 7 is arranged between two layers of a layer system, it is advantageous if the conductor? Has openings 39 in which extend the adhesive connecting the two layers and the adhesion between the two layers can be improved.
- a conductor ? which consists of a large number of wires which are intertwined with one another in such a way that openings 39 are formed, is a further embodiment of the conductor 7.
- the leader ? made of an in particular adhesive aluminum adhesive tape, a conductive metallic thin-walled and flexible tape, preferably with openings or an electrically conductive material, in particular on both sides coated tape.
- the leader ? be designed as a section of the liner that is doped in sections or as a particularly selectively applied thin film, possibly primed.
- Reference electrode 33 first monitoring electrode 35 second monitoring electrode 36 third monitoring electrode 37
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Measuring Volume Flow (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/257,981 US20240060804A1 (en) | 2020-12-16 | 2021-11-26 | Magnetic-inductive flow meter |
CN202180083778.1A CN116601466A (zh) | 2020-12-16 | 2021-11-26 | 磁感应流量计 |
EP21824502.5A EP4264196A1 (de) | 2020-12-16 | 2021-11-26 | Magnetisch-induktives durchflussmessgerät |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020133859.7A DE102020133859A1 (de) | 2020-12-16 | 2020-12-16 | Magnetisch-induktives Durchflussmessgerät |
DE102020133859.7 | 2020-12-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022128419A1 true WO2022128419A1 (de) | 2022-06-23 |
Family
ID=78916543
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2021/083227 WO2022128419A1 (de) | 2020-12-16 | 2021-11-26 | Magnetisch-induktives durchflussmessgerät |
Country Status (5)
Country | Link |
---|---|
US (1) | US20240060804A1 (de) |
EP (1) | EP4264196A1 (de) |
CN (1) | CN116601466A (de) |
DE (1) | DE102020133859A1 (de) |
WO (1) | WO2022128419A1 (de) |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4513624A (en) | 1983-01-20 | 1985-04-30 | The Foxboro Company | Capacitively-coupled magnetic flowmeter |
JPH04220529A (ja) * | 1990-12-20 | 1992-08-11 | Tokico Ltd | 質量流量計 |
EP0766069B1 (de) | 1995-09-29 | 2005-07-27 | Invensys Systems, Inc. | Strömungsrohr mit Auskleidung |
DE102004062680A1 (de) | 2004-12-21 | 2006-06-22 | Endress + Hauser Flowtec Ag | In-Line-Meßgerät mit einem Meßrohr und Verfahren zu dessen Herstellung |
DE102005044972A1 (de) | 2005-09-20 | 2007-03-22 | Endress + Hauser Flowtec Ag | Verfahren zum Herstellen eines Kunststoffes, insb. eines Polyurethans sowie Verfahren zum Herstellen eines aus solch einem Kunststoff bestehenden Liners für ein Meßrohr eines In-Line-Meßgeräts |
US20100037702A1 (en) * | 2008-08-18 | 2010-02-18 | Abb Technology Ag | Flowmeter |
DE102008054432A1 (de) * | 2008-12-09 | 2010-06-10 | Endress + Hauser Flowtec Ag | Messeinrichtung mit einem Messrohr und Verfahren zur Überwachung der Messeinrichtung sowie Vorrichtung zur Überwachung einer Rohrleitung |
US20150300851A1 (en) * | 2012-11-27 | 2015-10-22 | Siemens Aktiengesellschaft | Magnetically inductive flow meter |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006250692A (ja) | 2005-03-10 | 2006-09-21 | Yokogawa Electric Corp | 電磁流量計 |
CN102359801B (zh) | 2011-09-26 | 2012-10-03 | 中环天仪股份有限公司 | 一种电磁流量计磨损板报警装置及安装工艺 |
-
2020
- 2020-12-16 DE DE102020133859.7A patent/DE102020133859A1/de active Pending
-
2021
- 2021-11-26 CN CN202180083778.1A patent/CN116601466A/zh active Pending
- 2021-11-26 US US18/257,981 patent/US20240060804A1/en active Pending
- 2021-11-26 WO PCT/EP2021/083227 patent/WO2022128419A1/de active Application Filing
- 2021-11-26 EP EP21824502.5A patent/EP4264196A1/de active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4513624A (en) | 1983-01-20 | 1985-04-30 | The Foxboro Company | Capacitively-coupled magnetic flowmeter |
JPH04220529A (ja) * | 1990-12-20 | 1992-08-11 | Tokico Ltd | 質量流量計 |
EP0766069B1 (de) | 1995-09-29 | 2005-07-27 | Invensys Systems, Inc. | Strömungsrohr mit Auskleidung |
DE102004062680A1 (de) | 2004-12-21 | 2006-06-22 | Endress + Hauser Flowtec Ag | In-Line-Meßgerät mit einem Meßrohr und Verfahren zu dessen Herstellung |
DE102005044972A1 (de) | 2005-09-20 | 2007-03-22 | Endress + Hauser Flowtec Ag | Verfahren zum Herstellen eines Kunststoffes, insb. eines Polyurethans sowie Verfahren zum Herstellen eines aus solch einem Kunststoff bestehenden Liners für ein Meßrohr eines In-Line-Meßgeräts |
US20100037702A1 (en) * | 2008-08-18 | 2010-02-18 | Abb Technology Ag | Flowmeter |
DE102008054432A1 (de) * | 2008-12-09 | 2010-06-10 | Endress + Hauser Flowtec Ag | Messeinrichtung mit einem Messrohr und Verfahren zur Überwachung der Messeinrichtung sowie Vorrichtung zur Überwachung einer Rohrleitung |
WO2010066518A1 (de) | 2008-12-09 | 2010-06-17 | Endress+Hauser Flowtec Ag | Messeinrichtung mit einem messrohr und verfahren zur überwachung der messeinrichtung sowie vorrichtung zur überwachung einer rohrleitung |
US20150300851A1 (en) * | 2012-11-27 | 2015-10-22 | Siemens Aktiengesellschaft | Magnetically inductive flow meter |
Also Published As
Publication number | Publication date |
---|---|
EP4264196A1 (de) | 2023-10-25 |
CN116601466A (zh) | 2023-08-15 |
DE102020133859A1 (de) | 2022-06-23 |
US20240060804A1 (en) | 2024-02-22 |
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