WO1996013701A3 - Apparatus for and method of draining ultrasonic transducer port cavities - Google Patents

Apparatus for and method of draining ultrasonic transducer port cavities Download PDF

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Publication number
WO1996013701A3
WO1996013701A3 PCT/IB1995/001023 IB9501023W WO9613701A3 WO 1996013701 A3 WO1996013701 A3 WO 1996013701A3 IB 9501023 W IB9501023 W IB 9501023W WO 9613701 A3 WO9613701 A3 WO 9613701A3
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
draining
port
transducer
movement
Prior art date
Application number
PCT/IB1995/001023
Other languages
French (fr)
Other versions
WO1996013701A2 (en
Inventor
William Freund Jr
Charles R Allen
Original Assignee
Daniel Ind Inc
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 Daniel Ind Inc filed Critical Daniel Ind Inc
Priority to EP95936058A priority Critical patent/EP0835427A4/en
Priority to AU38138/95A priority patent/AU3813895A/en
Publication of WO1996013701A2 publication Critical patent/WO1996013701A2/en
Publication of WO1996013701A3 publication Critical patent/WO1996013701A3/en

Links

Classifications

    • 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
    • G01F15/08—Air or gas separators in combination with liquid meters; Liquid separators in combination with gas-meters
    • 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
    • G01F1/74—Devices for measuring flow of a fluid or flow of a fluent solid material in suspension in another fluid
    • 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
    • G01F15/12—Cleaning arrangements; Filters

Abstract

A self-draining design for an ultrasonic gas meter is disclosed. The self-draining design of the present invention provides either a duct extending generally horizontally between the cavity and the bore to permit gravity to drain liquid therefrom, or extending vertically from the cavity to the outside of the housing to permit accumulated liquid to be drained by gravity and/or the action of a gas blowdown. The self-draining design of the present invention provides that a transducer-port assembly is configured to enhance the movement of fluid by maintaining a distance between the transducer and the surfaces of the port for enhancing the effect of surface tension of the liquid for reducing the surface area of the liquid. By allowing the liquid to assume a smaller surface area, typically spherical, the liquid reduces its friction or drag. The reduction of the surface area/volume ratio of the liquid greatly reduces the friction forces between the liquid and the surfaces of the transducer-port assembly for overcoming inertia and for enhancing the movement of the liquid for draining the meter. The method of draining accumulated liquid from an ultrasonic flowmeter comprises the steps of (a) maintaining a displacement between the transducer and the surfaces of the port which is sufficiently large to enhance the surface tension effect of the liquid for reducing the surface area/volume ratio of the liquid sufficient to reduce the forces between the liquid and the surfaces of the transducer-port assembly, (b) overcoming the inertia associated with the liquid by gravity causing the liquid to move, and (c) enhancing the movement of the liquid from the cavity in the port by gravity providing the force to continue the movement of the liquid such that the liquid is sufficiently removed from the port so that the meter is unfettered by coupling.
PCT/IB1995/001023 1994-10-21 1995-10-23 Apparatus for and method of draining ultrasonic transducer port cavities WO1996013701A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP95936058A EP0835427A4 (en) 1994-10-21 1995-10-23 Apparatus for and method of draining ultrasonic transducer port cavities
AU38138/95A AU3813895A (en) 1994-10-21 1995-10-23 Apparatus for and method of draining ultrasonic transducer port cavities

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US32730194A 1994-10-21 1994-10-21
US08/327,301 1994-10-21

Publications (2)

Publication Number Publication Date
WO1996013701A2 WO1996013701A2 (en) 1996-05-09
WO1996013701A3 true WO1996013701A3 (en) 1996-10-10

Family

ID=23275994

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1995/001023 WO1996013701A2 (en) 1994-10-21 1995-10-23 Apparatus for and method of draining ultrasonic transducer port cavities

Country Status (3)

Country Link
EP (1) EP0835427A4 (en)
AU (1) AU3813895A (en)
WO (1) WO1996013701A2 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10145565A1 (en) * 2001-09-14 2003-04-10 Sick Ag Measurement pick-up for measuring fluid flow rate and/or throughput has diametrically opposed accommodation surfaces with measurement bodies in openings defining measurement path
DE10145566A1 (en) * 2001-09-14 2003-04-03 Sick Engineering Gmbh Device for measuring the flow rate and / or the flow of a fluid
DE102005003398A1 (en) * 2005-01-24 2006-08-03 Endress + Hauser Flowtec Ag Device for determining and / or monitoring volume and / or mass flow
EP2512335B1 (en) 2009-12-18 2018-05-02 Maquet Critical Care AB Gas meter for ultrasound measurements in a breathing apparatus
WO2011119596A2 (en) * 2010-03-25 2011-09-29 Daniel Measurement And Control, Inc. Ultrasonic flow meter with liquid drainage system
CN103293334B (en) * 2013-05-07 2015-05-20 河南财经政法大学 Flowmeter acoustic sensor
CN109579925A (en) * 2018-11-17 2019-04-05 德闻仪器仪表(上海)有限公司 A kind of built-in multichannel ultrasonic flow metering module
DE102019109787A1 (en) * 2019-04-12 2020-10-15 Endress+Hauser SE+Co. KG Hygienic pipe adapter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4823612A (en) * 1986-07-10 1989-04-25 Kaijo Denki Co., Ltd. Socket structure for mounting ultrasonic gas flow measuring device with respect to gas flow pipe
US5275060A (en) * 1990-06-29 1994-01-04 Panametrics, Inc. Ultrasonic transducer system with crosstalk isolation

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4193009A (en) * 1976-01-26 1980-03-11 Durley Benton A Iii Ultrasonic piezoelectric transducer using a rubber mounting
JPS6193914A (en) * 1984-10-13 1986-05-12 Sumitomo Metal Ind Ltd Method and device for ultrasonic measurement of fluid flow rate
US5440937A (en) * 1993-04-30 1995-08-15 Panametrics, Inc. Process and apparatus for ultrasonic measurement of volumeric flow through large-diameter stack

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4823612A (en) * 1986-07-10 1989-04-25 Kaijo Denki Co., Ltd. Socket structure for mounting ultrasonic gas flow measuring device with respect to gas flow pipe
US5275060A (en) * 1990-06-29 1994-01-04 Panametrics, Inc. Ultrasonic transducer system with crosstalk isolation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0835427A4 *

Also Published As

Publication number Publication date
WO1996013701A2 (en) 1996-05-09
EP0835427A4 (en) 1998-09-16
EP0835427A2 (en) 1998-04-15
AU3813895A (en) 1996-05-23

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