WO2015000487A1 - Débitmètre à revêtement continu - Google Patents

Débitmètre à revêtement continu Download PDF

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Publication number
WO2015000487A1
WO2015000487A1 PCT/DK2014/050193 DK2014050193W WO2015000487A1 WO 2015000487 A1 WO2015000487 A1 WO 2015000487A1 DK 2014050193 W DK2014050193 W DK 2014050193W WO 2015000487 A1 WO2015000487 A1 WO 2015000487A1
Authority
WO
WIPO (PCT)
Prior art keywords
liner
flow tube
flow meter
ultrasonic
flow
Prior art date
Application number
PCT/DK2014/050193
Other languages
English (en)
Inventor
Peter Schmidt Laursen
Søren Tønnes Nielsen
Original Assignee
Kamstrup A/S
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 Kamstrup A/S filed Critical Kamstrup A/S
Publication of WO2015000487A1 publication Critical patent/WO2015000487A1/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
    • G01F1/66—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 measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
    • G01F1/662—Constructional details
    • 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
    • G01F1/66—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 measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
    • G01F1/667—Arrangements of transducers for ultrasonic flowmeters; Circuits for operating ultrasonic flowmeters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/006—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus characterised by the use of a particular material, e.g. anti-corrosive material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/14—Casings, e.g. of special material

Definitions

  • the present invention relates to an ultrasonic flow meter, and in particular to an ultrasonic flow meter comprising a liner inside the flow tube.
  • ultrasonic transducers are mounted on a flow channel in a way so that ultrasonic signals can be introduced into the flow channel and travel along a measuring section to be detected after the passage.
  • the operation of the ultrasonic transducers is controlled by an electronic circuit, electrically connected to the transducers.
  • a flow meter may be used as, or together with a heat meter for measuring the flow rate of hot liquid used in connection with district heating.
  • the flow channel is provided by a flow tube in the form of a metal housing, typically made from brass.
  • a metal flow tube has the advantage that it is strong and water-tight and may be used together with hot liquids, but it is relatively expensive to produce.
  • transducer inserts are mounted in openings of the wall of the flow tube. The openings in the flow tube are normally sealed by rubber seals such as O-rings provided between the transducer insert and the flow tube.
  • the flow channel is provided by a flow tube from a polymer, which may be produced relatively in-expensively. Ultrasonic signals may be transmitted through the wall of the polymer flow tube, thereby eliminating any need for a sealing of the flow tube.
  • Special polymer materials should however be used for the flow tube in order to ensure that it is sufficiently strong and sufficiently water-tight.
  • strong polymer materials are normally not completely watertight and somewhat brittle.
  • polymers risk decomposing in hot liquid due to hydrolysis and as a consequence have limited lifetimes.
  • an ultrasonic flow meter arranged to measure a flow rate of a fluid, the flow meter comprising:
  • a flow tube with a through-going opening for passage of a fluid between an inlet and an outlet, and at least one through-going opening in a wall of the flow tube;
  • control circuit arranged for operating the two or more piezoelectric transducers and to generate a signal or value indicative of the flow rate of the fluid
  • the flow tube is provided in a first material which comprises a first polymer and a first filler
  • the unbroken liner is provided in a second material which comprises a second polymer and optionally a second filler
  • the second polymer is selected from the group consisting of polysulphones, polysulphides and polyaryletherketones.
  • the flow meter of the present invention has a two-part flow housing, a first part being the flow tube and a second part being the liner, each of these parts having specific properties adapted to their applications.
  • the liner is to be understood as a cover of the inner surface of the flow tube, which would otherwise be exposed to the fluid.
  • a liner for a flow tube is known from Japanese Patent Application JP H05 296808 A to Tokico, Ltd. This document, however, is silent as to the combination of materials choices for the flow tube and the liner.
  • the inventor of the present invention has realized that by providing the flow tube in a first material which comprises a first polymer and a first filler, and the unbroken liner in a second material which comprises a second polymer and optionally a second filler, and wherein the second polymer is selected from the group consisting of polysulphones, polysulphides and polyaryletherketones, the above need is fulfilled.
  • the filler should be understood as a compound, typically in terms of particles, added to a material to improve or otherwise change the properties of the mixture material.
  • a flow meter may be obtained in an in-expensive manner which by proper choice of first material is sufficiently strong for handling and use, and sufficiently water-tight, and which due to the selected second material for the liner can sustain prolonged use in hot liquid, and thus eliminate an need for sealing surfaces relative to the ultrasonic transducers.
  • Polymers and composite material based thereupon have varying resistance towards hydrolysis depending on the nature of the functional groups making up the backbone of the polymer, and on the amount of any filler used therein.
  • the flow tube with the liner of the present invention addresses this dual problem: It provides a flow tube of high mechanical stability due to its content of filler. Simultaneously, the liner, which is selected to have high resistance against hydrolysis, protects the flow tube from hydrolysis. Also with the introduction of the liner of the present invention, the flow tube may be made from a broad range of inexpensive polymers.
  • the first material comprises the first filler in a first w/w-ratio in the range of 10-70%, preferably 20-50%, more preferably 30-40%.
  • the liner is preferably made of the second polymer only.
  • the second material comprises the second filler in a second w/w ratio in the range of 1-20%, preferably 1-10%, more preferably 1-5%.
  • Such small relative amounts of the second filler provide excellent mechanical and chemical properties of the second material.
  • the first w/w-ratio is higher than the second w/w-ratio, i.e. that the first material of the flow tube has a higher content of filler than has the second material of the liner.
  • both the liner and the flow tube are provided in thermoplastic materials so that they may be fabricated by injection moulding, and wherein the flow tube is moulded onto the unbroken liner.
  • 2K moulding the fabrication process may be provided in a very cost-efficient manner.
  • Water for district heating is typically heated up to 130°C by the utility plant, and advantageously the second material of the liner has an sustained-use temperature of at least 150°C.
  • the second material of the liner has a sustained-use temperature in the temperature range of 90-150°C.
  • the liner material should be resistant to hydrolysis for a time period of more than 10 years, such as 15 years, 20 years or even longer.
  • the first polymer of the flow tube is selected from the group consisting of polysulphone (PSU), polyethersulphone (PES), polyphenylenesulphide (PPS), polystyrene (PS), and polyamide (PA), in particular polyamide 12 (PA 12) from 1,12-dodecandioic acid. These materials are all sufficiently strong for handling and mount in district heating pipelines.
  • the second polymer for the liner is selected from the group consisting of polysulphone (PSU), polyethersulphone (PES), polyphenylethersulphone (PPSU),
  • PPS polyphenylenesulphide
  • PEK polyetherketone
  • PEEK polyetheretherketone
  • PEKK polyetherketoneketone
  • polysulphones are defined as polymers wherein sulphone groups (-S(C>2)-) make up part of the backbone structure of the polymer.
  • examples include but are not limited to polysulphone (PSU) polyphenylethersulphone (PPSU), and polyethersulphone (PES).
  • polysulphides are defined as polymers wherein sulphide groups (-S-) make up part of the backbone structure of the polymer.
  • An example hereof is polyphenylene sulphide (PPS).
  • polyaryletherketones are defined as polymers wherein combinations of ether groups (-0-) and ketone groups (-C(O)-) make up part of the backbone structure of the polymer.
  • Examples include but are not limited to polyetherketone (PEK), polyetheretherketone (PEEK), and polyetherketoneketone (PEKK). All of these three groups of polymers are characterized by not involving any ester groups (-C(O)O-) or amide groups (-C(O)N-) as part of their backbone. They are further characterized by being thermoplastic materials.
  • PEK polyetherketone
  • PEEK polyetheretherketone
  • PEKK polyetherketoneketone
  • the first filler is selected from the group consisting of graphite, carbon, carbon fibers, glass fibers and metal powder.
  • the second filler is selected from the group consisting of graphite, carbon, carbon fibers, glass fibers and metal powder.
  • Such first and second fillers which in turn are selected independently, constitute reinforcing agents and provide mechanical stability to the flow tube and the liner, respectively.
  • a method of fabricating a flow meter comprises: - providing an unbroken liner; providing a flow tube with a through-going opening for passage of a fluid between an inlet and an outlet, and at least one through-going opening in a wall of the flow tube, the flow tube being provided to envelope the unbroken liner; arranging two or more piezoelectric transducers at an outside of the liner in the at least one through-going opening in the wall of the flow tube, so that ultrasonic signals from the piezoelectric transducers are transmitted through the liner; and arranging a control circuit for operating the two or more piezoelectric transducers and to generate a signal or value indicative of the flow rate of the fluid; characterized in that the flow tube is provided in a first material which comprises a first polymer and a first filler, and the unbroken liner is provided in a second material which comprises a second polymer and optionally a second filler, and wherein the second polymer is selected from the group
  • Fig. 1 illustrates an embodiment of an ultrasonic flow meter with an unbroken liner in the flow passage
  • Fig. 2 illustrates a flow meter installed in a pipe installation
  • Figs. 3 A to 3 C illustrate embodiments of geometric configurations of the liner with respect to a disc shaped piezo electric transducer
  • Fig. 4 illustrates a flow meter where the shaped of the liner is such that the plane of the transducers are tilted with respect to a centre axis of the flow tube;
  • Fig. 5 illustrates an embodiment where the flow tube is monolithically formed with a house for housing various components of the flow meter.
  • FIG. 1 illustrates an embodiment of an ultrasonic flow meter in accordance with the present invention.
  • the flow meter 1 comprises a flow tube 2 with a through-going opening for passage of a fluid between an inlet 3 and an outlet 4.
  • the through-going opening is also referred to as a flow passage 7.
  • the flow tube 2 further comprises two through-going openings 5 in a wall of the flow tube, with two piezoelectric transducers 11, 12 arranged in these wall openings.
  • a control circuit 8 in the form of a printed circuit board (PCB) is arranged for operating the two or more piezoelectric transducers and to generate a signal or value indicative of the flow rate of the fluid.
  • PCB printed circuit board
  • the transducers are in direct contact with the PCB, however the transducers may also be supported by holders and connected to the control circuit by means of electrical conductors.
  • a liner 6, in the form of an unbroken liner, is arranged in the flow tube to cover the inner surface of the flow tube 2, which would otherwise be exposed to the fluid therein.
  • the liner 6 is provided in a water-tight material so that any fluid flowing in the in the flow tube 2 will not leak through the transducer openings 5 in the flow tube 2.
  • the flow meter housing thus comprises two parts, a flow tube 2 and a liner 6.
  • the flow tube is provided with holes in the wall arranged for receiving transducers 11, 12, whereas the liner 6 is unbroken with the piezoelectric transducers 11, 12 being arranged at an outside of the liner 6 in the area defined by the wall openings 5 of the flow tube 2, so that ultrasonic signals are transmitted through the liner wall to enter and exit the flow tube 2.
  • the wall thickness at least in the coupling area, i.e.
  • the wall area through which ultrasonic signals are coupled may be adapted in accordance with the so-called matching layer principle where the thickness of the wall is adjusted to a proper thickness to ensure proper transmission of the emitted ultrasonic waves of the ultrasonic transducer through the wall and into the flow channel, possibly under the constraint that the area should have thickness which ensures a sufficient strength.
  • the thickness of the liner 6 may be matched to the acoustic wavelength of the emitted ultrasonic wave of the transducers 11, 12.
  • the ultrasonic flow meter 1 is a transit time flow meter arranged to measure a flow rate of a fluid flowing in the flow passage 7 by use of the known operation principle for transit time flow meters, i.e. where ultrasonic signals 10 are emitted at one transducer 11 and received at the other transducer 12, and where the difference in time-of-arrival between oppositely propagating signals is measured and converted into a flow rate.
  • the piezoelectric transducers 11, 12 are operated by the control circuit 8, which based on the involved signals generate a signal or value indicative of the flow rate of the fluid.
  • the level of signal treatment of the control circuit may vary from basic signal treatment, where processed signals are output to a further electronic unit for further signal processing, to a complete signal treatment resulting in the determination of the flow rate.
  • Such further electronic unit may be part of the flow meter 1, or may be part of a separate calculator circuit (not shown) communicatively connected to the flow meter 1.
  • Fig. 1 further illustrates a display 15 for displaying information relating to the consumed amount of fluid, a radio unit 16 for wireless remote reading of the meter, and a cover 9 for encapsulating the flow electronics to form an assembled flow meter.
  • Further elements may also be present, such as one or more batteries for supplying power to electronics, temperature sensors for measuring the temperature of the flowing fluid, etc.
  • the cover 9 may be any type of house or compartment suitable for housing the elements of the flow meter.
  • the cover 9 is illustrated as a single element, but in general it may be made of more elements, such as a cup or wall part and a lid.
  • the cover 9 may be attached to the flow tube 2 by means of clamps, or any suitable means.
  • the flow meter housing comprises the flow tube 2 and the liner 6.
  • the flow tube 2 is provided in polyethersulfone with 30% w/w of glass fibers, which makes up a strong and stiff material, so that the flow meter can withstand mount in a pipe line installation for district heating.
  • the liner 6 is made up of pure polyphenylethersulfone, which is water-tight and resistant to hydrolysis.
  • the liner 6 is made up of polyphenylethersulfone with 3% w/w of glass fibers, which is still sufficiently water-tight and resistant to hydrolysis as a liner for district heating purposes.
  • water-tight is to be understood broadly, and refers to that virtually no water penetrates through the liner. In practice, zero moisture penetration may not be possible, and the term water-tight may refer to materials which comply with the standardized Ingress Protection (IP) classes of at least class IP65, but preferably higher classifications such as IP66, IP67 or even IP68 which is the highest IP class.
  • IP Ingress Protection
  • the flow tube comprises a sealing surface 13 constituting the end surface of the flow tube for sealed connection to a pipe installation.
  • the liner 6 is extended onto the sealing surface to provide a sealing means 14.
  • the liner ensures that fluid is not leaked neither through the transducer openings 5 in the wall of the flow tube 2, nor through the connection area to a pipe installation.
  • the liner 6 is a single sealing means for sealing off the entire flow tube 2.
  • Fig. 2 schematically illustrates the flow meter 1 installed in a pipe installation 20.
  • the flow meter 1 is installed in the pipe line in a sealed manner by use of the sealing part 14 of the liner 6.
  • the sealing part 14 is squeezed in between the end section of the flow meter 1 and the end section of the pipe installation 20. These end sections may be shaped to provide suitable sealing surfaces.
  • the flow meter 1 is attached to the pipe installation 20 be means of a connection means 21, such as a union nut or other suitable means. In this manner, the flow passage becomes part of the pipe line for supplying a flowing fluid 22 to a consumer.
  • the ultrasonic flow meter may be or may be part of a charging consumption meter, e.g.
  • the consumption meter is arranged for measuring consumption data of a supplied utility used as a basis for billing.
  • the consumption meter may be used in connection with district heating or district cooling.
  • the consumption meter may be a legal meter, i.e. a meter which is subdued to regulatory demands. Such regulatory demands may be demands to the precision of the measurements.
  • Figs. 3 A to 3 C illustrate different embodiments of geometric configurations of the liner 6 with respect to a disc shaped piezo electric transducer 11.
  • the piezoelectric transducers are monolithic piezoelectric transducers of a ceramic material, such as lead zirconate titanate (PZT) based transducers.
  • PZT lead zirconate titanate
  • Such transducers are disc or cylinder shaped, thus comprise two opposite parallel flat surfaces.
  • Fig. 3 A illustrates an embodiment where the liner6 is flat in a contact area with the piezoelectric transducer 11, so that a front surface of the piezoelectric transducer 11 and the outer surface of the liner 6 are plane parallel in the contact area.
  • Fig. 3B illustrates an embodiment where also the inner surface of the liner is flat in an area covering a contact area with the piezoelectric transducer 11, so that a front surface of the piezoelectric transducer 11 and the inner surface of the liner 6 are plane parallel in the area covering the contact area.
  • Fig. 3C illustrates an embodiment wherein the flat surface of the transducer is adapted to the curved outer surface of the liner by means of an adaptor piece 30 provided in the area between the outer surface of the liner 6 and the outer surface of the piezoelectric transducer 11.
  • the inner surface of the liner is flat, as in Fig. 3B, whereas the outer surface of the liner is curved.
  • an adaptor piece may also be used to match the flat transducer 11 to the curved liner 6.
  • the manufacturing of such surfaces is disclosed below with embodiments of fabricating a flow meter.
  • the flow meter comprises a flow insert 17 comprising two or more reflectors 18, 19 for directing an ultrasonic signal from an emitting piezoelectric transducer 11 to a receiving piezoelectric transducer 12 in a manner so that the ultrasonic signal propagates parallel with the direction of the flow tube 2, i.e. parallel with the centre axis of the flow tube 2.
  • the shown insert 17 comprises reflectors 18, 19 for directing the signal, as well as a centre piece in the form of a flow reducer.
  • a flow insert 17 is used in embodiments where the transducers 11, 12 are placed in the same plane in a manner so that the centre axis of the flow tube 2, the plane of the mounting area of the transducers 11, 12, and the plane of the PCB of the control circuit 8 all are parallel.
  • the piezoelectric transducers 11, 12 emit ultrasound perpendicular to the flow tube 2 and reflectors 18, 19 are needed to direct the ultrasonic signal along the flow passage.
  • Other types of flow inserts may also be used.
  • Fig. 4 illustrates an alternative embodiment where the shape of the liner 6 is such that the planes of the transducers 11, 12 are inclined with respect to a centre axis of the flow tube 2.
  • the two transducers 11, 12 partly oppose each other, and the ultrasonic signal may be reflected by an inside of the flow tube 2 so that a signal emitted at one transducer 11 arrives at the other transducer 12.
  • Fig. 4 illustrates a situation where the signal is reflected once to travel along a "V", however other configurations can be envisioned, e.g. where the signal is reflected three times to travel along a "W".
  • Fig. 5 illustrates an embodiment where the flow tube 2 is monolithically formed with a house (or cup) 50 for housing the control circuit for operating the two or more piezoelectric transducers, as well as the transducers, and possible other elements, such as display, battery, etc.
  • the liner 6 and the house 50 may be formed by injection moulding, as will be discussed below in further detail.
  • Fig. 5 further illustrates a cover 51 and a seal 53, e.g. a rubber seal, such as an O-ring, to form a sealed cavity 52 for housing electronic elements to operate the flow meter 1.
  • the flow meter 1 may further comprise an attachment means (not shown) for attaching the cover firmly to the house 50.
  • Such attachment means may be a lock ring.
  • This embodiment provides a flow meter where the electronic elements are comprised within a cavity or compartment 52 of a house 50 which only has a single sealing surface towards the exterior. The sealing towards the flow tube 2 is made up by the unbroken liner 6. Thus only a single sealing element (the O-ring) is used to seal between the rim of the cavity and the cover.
  • a flow meter may be fabricated according to the method of the second aspect of the invention.
  • the liner may be provided in a first moulding step, and the flow tube may be provided in a second moulding step, where the flow tube 2 is moulded onto the liner 6.
  • Any shaping needed e.g. as illustrated in Fig. 3A and 3B, can be provided by using a proper mould shape.
  • the flow tube 2 is provided in a first moulding step, and the liner 6 is provided by injection moulding it directly onto the flow tube 2. This may be done by inserting a core element into the through-going opening for passage of a fluid of the flow tube 2; and injection moulding the liner 6 in the space between the core element and the flow tube 2.
  • unbroken liner 6 is provided in the flow tube 2 by insertion through either the inlet 3 or the outlet 4 of the through-going opening for passage of a fluid.
  • Fig. 5 may be provided in the injection moulding process where the mould is shaped to further define the house structure 50, so that the flow tube 2 and the house 50 are moulded in the same step to form a monolithic unit. In this manner a complete flow meter may be injection moulded in a two-step mould process.

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

Abstract

La présente invention concerne un débitmètre (1) ultrasonore ayant un revêtement (6) continu à l'intérieur du tube d'écoulement. Le tube d'écoulement (2) possède au moins une ouverture (5) traversante dans la paroi. Le revêtement (6) continu est fourni dans une matière étanche à l'eau et agencé dans le tube d'écoulement pour recouvrir toute la surface interne du tube d'écoulement. Les transducteurs (11, 12) piézoélectriques sont agencés à l'extérieur du revêtement (6) dans la ou les ouvertures (5) traversantes dans la paroi du tube d'écoulement (2), de telle sorte que des signaux ultrasonores sont émis à travers la paroi de revêtement pour entrer dans le tube d'écoulement (2). Le revêtement (6) est fourni en un polymère sélectionné parmi le groupe constitué par les polysulphones, les polysulphures et les polyaryléthercétones. L'invention concerne ainsi un débitmètre (1) qui élimine un quelconque besoin de surfaces d'étanchéité concernant les transducteurs ultrasonores et qui peut supporter une utilisation prolongée dans un liquide chaud.
PCT/DK2014/050193 2013-07-02 2014-06-30 Débitmètre à revêtement continu WO2015000487A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP13174654.7 2013-07-02
EP13174654 2013-07-02

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WO2015000487A1 true WO2015000487A1 (fr) 2015-01-08

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015184319A1 (fr) * 2014-05-31 2015-12-03 General Electric Company Dispositif à ultrasons et procédé de mesure d'écoulement de fluide à l'aide du dispositif à ultrasons
DE102014113843A1 (de) * 2014-09-24 2016-03-24 Endress+Hauser Flowtec Ag Messrohr für ein Durchflussmessgerät und ein magnetisch-induktives Durchflussmessgerät
WO2016139442A1 (fr) * 2015-03-02 2016-09-09 Aquacheck Engineering H Limited Compteur d'eau ultrasonique et tuyau vertical l'incorporant
US10508966B2 (en) 2015-02-05 2019-12-17 Homeserve Plc Water flow analysis
US10704979B2 (en) 2015-01-07 2020-07-07 Homeserve Plc Flow detection device
US10823597B2 (en) 2017-12-14 2020-11-03 Arad Ltd. Ultrasonic water meter including a metallic outer body and polymeric inner lining sleeve
CN113785175A (zh) * 2019-05-03 2021-12-10 卡姆鲁普股份有限公司 流量计的流动管和壳体
WO2023035562A1 (fr) * 2021-09-10 2023-03-16 威海市天罡仪表股份有限公司 Débitmètre avec capteur ultrasonique intégré et corps du débitmètre
WO2023163331A1 (fr) * 2022-02-28 2023-08-31 주식회사 레오테크 Compteur d'eau intelligent

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986002723A1 (fr) * 1984-10-23 1986-05-09 N.V. Nederlandsche Apparatenfabriek Nedap Transducteur a reflexion acoustique reduite
DE4118809A1 (de) * 1991-06-07 1992-12-10 Georg F Wagner Vorrichtung zur messung kleiner fluessigkeits- und partikelstroeme
JPH05296808A (ja) 1992-02-20 1993-11-12 Tokico Ltd 超音波流量計
EP2083250A1 (fr) * 2007-12-13 2009-07-29 Kamstrup A/S Compteur de consommation de polymères doté d'un couvercle à double couche
WO2012118669A1 (fr) * 2011-03-02 2012-09-07 Cameron International Corporation Débitmètre à ultrasons équilibré en pression

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986002723A1 (fr) * 1984-10-23 1986-05-09 N.V. Nederlandsche Apparatenfabriek Nedap Transducteur a reflexion acoustique reduite
DE4118809A1 (de) * 1991-06-07 1992-12-10 Georg F Wagner Vorrichtung zur messung kleiner fluessigkeits- und partikelstroeme
JPH05296808A (ja) 1992-02-20 1993-11-12 Tokico Ltd 超音波流量計
EP2083250A1 (fr) * 2007-12-13 2009-07-29 Kamstrup A/S Compteur de consommation de polymères doté d'un couvercle à double couche
WO2012118669A1 (fr) * 2011-03-02 2012-09-07 Cameron International Corporation Débitmètre à ultrasons équilibré en pression

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170102253A1 (en) * 2014-05-31 2017-04-13 General Electric Company Ultrasonic device and method for measuring fluid flow using the ultrasonic device
WO2015184319A1 (fr) * 2014-05-31 2015-12-03 General Electric Company Dispositif à ultrasons et procédé de mesure d'écoulement de fluide à l'aide du dispositif à ultrasons
DE102014113843A1 (de) * 2014-09-24 2016-03-24 Endress+Hauser Flowtec Ag Messrohr für ein Durchflussmessgerät und ein magnetisch-induktives Durchflussmessgerät
US10704979B2 (en) 2015-01-07 2020-07-07 Homeserve Plc Flow detection device
US10942080B2 (en) 2015-01-07 2021-03-09 Homeserve Plc Fluid flow detection apparatus
US11209333B2 (en) 2015-01-07 2021-12-28 Homeserve Plc Flow detection device
US10508966B2 (en) 2015-02-05 2019-12-17 Homeserve Plc Water flow analysis
GB2550796A (en) * 2015-03-02 2017-11-29 Coffey Richard An ultrasonic water meter and a standpipe incorporating same
WO2016139442A1 (fr) * 2015-03-02 2016-09-09 Aquacheck Engineering H Limited Compteur d'eau ultrasonique et tuyau vertical l'incorporant
GB2550796B (en) * 2015-03-02 2021-12-08 Coffey Richard An ultrasonic water meter and a standpipe incorporating same
US10823597B2 (en) 2017-12-14 2020-11-03 Arad Ltd. Ultrasonic water meter including a metallic outer body and polymeric inner lining sleeve
CN113785175A (zh) * 2019-05-03 2021-12-10 卡姆鲁普股份有限公司 流量计的流动管和壳体
WO2023035562A1 (fr) * 2021-09-10 2023-03-16 威海市天罡仪表股份有限公司 Débitmètre avec capteur ultrasonique intégré et corps du débitmètre
WO2023163331A1 (fr) * 2022-02-28 2023-08-31 주식회사 레오테크 Compteur d'eau intelligent

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