WO1997010490A1 - A device for determining the amount of liquid flowing through a piping system - Google Patents

A device for determining the amount of liquid flowing through a piping system Download PDF

Info

Publication number
WO1997010490A1
WO1997010490A1 PCT/DK1996/000377 DK9600377W WO9710490A1 WO 1997010490 A1 WO1997010490 A1 WO 1997010490A1 DK 9600377 W DK9600377 W DK 9600377W WO 9710490 A1 WO9710490 A1 WO 9710490A1
Authority
WO
WIPO (PCT)
Prior art keywords
flow duct
transducer
ribs
transducers
dome
Prior art date
Application number
PCT/DK1996/000377
Other languages
French (fr)
Inventor
Henrik Norgreen
Original Assignee
Raab Karcher Energieservice Gmbh
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 Raab Karcher Energieservice Gmbh filed Critical Raab Karcher Energieservice Gmbh
Priority to AU67863/96A priority Critical patent/AU6786396A/en
Publication of WO1997010490A1 publication Critical patent/WO1997010490A1/en

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
    • G01F1/66—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

Definitions

  • a device for determining the amount of liquid flowing through a piping system A device for determining the amount of liquid flowing through a piping system.
  • the invention concerns a device for determining the flow amount of liquid in a pipe system, said pipe system hav ⁇ ing inserted therein an ultrasonic meter which consists of a flow duct at whose ends a first measuring transducer and a second measuring transducer, respectively, are ar- ranged, said measuring transducers being suspended cen ⁇ trally at the ends of the flow duct.
  • Danish Published Application No. 161258 discloses a meas ⁇ uring device in which a transducer is mounted at the ends of a measuring pipe.
  • the liquid whose flow amount is to be determined is conveyed via an inlet distribution cham ⁇ ber to a transducer, which is mounted at one end of a flow duct, and further through the flow duct to the other end at which a second transducer is mounted.
  • This device thus involves a system in which liquid is conveyed into distribution chambers which are staggered with respect to the axial direction of the measuring path. This known de ⁇ vice therefore requires some mounting space because of the position of the distribution chambers.
  • European Patent Specification No. 88235 discloses a de ⁇ vice of the type defined in the introductory portion of claim 1.
  • This known transducer incorporates distri ⁇ bution chambers which are positioned axially with the flow duct itself in one embodiment.
  • the transducers are suspended centrally in the distribution chambers to the flow duct, without it being indicated at all how the sus ⁇ pension is constructed.
  • the object of the invention is to provide a device of the type defined in the introductory portion of claim 1 which takes up less space and is moreover inex ⁇ pensive to produce.
  • the stated object is achieved by the device of claim 1, which is characterized in that the measuring transducers are suspended at the ends of the flow duct, and that they are suspended by rib-shaped means or from a plate having one or more through bores, the size and shape of said through bores being dimensioned for a given liquid flow.
  • the transducers are suspended from four ribs, a sturdy suspension is obtained, capable of foxedly securing the transducers even at high liquid flow rates.
  • dome-shaped unit which has a plane face having essentially the same diameter as the diameter of the transducers. It is a further advantage when the dome-shaped unit has a cavity extending from the plane face to receive the transducer, as the transducer is hereby protected well.
  • the transducer is retained very stably and fixedly in the dome-shaped unit.
  • the ribs have a curved shape along their axis of sym- metry, such as a convex or tray shape with a plane face from which the curvature begins at each side of the per ⁇ pendicular axis of symmetry of the plane face, it is en ⁇ sured that the liquid flow through the duct is disturbed as little as possible.
  • fig. 1 is sectional view of the device according to the invention.
  • fig. 2 shows the transducer with suspension according to the invention
  • fig. 3 shows a dome-shaped unit to protect the trans ⁇ ducer
  • fig. 4 is a perspective view of an embodiment of a rib to secure the transducer
  • fig. 5 is a cross-sectional view of a ring to secure the ribs of fig. 4.
  • a device for determining the flow of a liquid in a pipe system consists of a pipe 1 having a duct 3 which is terminated at both ends by a funnel 2.
  • a small pipe section having threads is arranged in extension of the funnel 2 and is intended to receive a gasket ring 6 adapted to engage the bottom of the small pipe section.
  • a transducer 4 may be engaged at the oppo ⁇ site side of the gasket ring 6 and be tightened by means of a nut 5.
  • the transducer 4 is suspended cen ⁇ trally by means of ribs 7, whose opposite ends with re ⁇ spect to the transducer are terminated by a ring 8.
  • This structure may be inserted in a simple manner by means of the gasket ring 6 and be tightened by means of the nut 5, as shown in fig. 1.
  • Fig. 3 schematically shows an embodiment in which the transducer 4 is protected by a dome-shaped unit 8, which has a base face 13 having essentially the same diameter as the transducer 4.
  • the dome-shaped unit may be constructed with a depression (not shown) in which the transducer may be positioned and be well protected there.
  • Fig. 4 shows a preferred embodiment of the ribs 7, as these are formed with a convex or tray shape, which also contributes to ensuring that liquid flowing through the flow duct 3 of fig. 1 is disturbed as little as possible.
  • fig. 5 shows a cross-section of the ring 8 which has two faces 11, 12 capable of engaging the small pipe in fig. 1, more particularly the gasket ring 6 with the face 12 and with the face 11 along the inner surface of the small pipe.
  • Fig. 5 additionally shows that the ring 10 has a curved surface 10 which may be dimensioned for the funnel 2 in fig. 1 so that the face 10 merges evenly into the funnel 2.
  • the dome-shaped unit may be shaped more pointedly than shown in fig. 3.

Landscapes

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

Abstract

To determine the flow of liquid in a pipe system an ultrasonic meter is inserted in the pipe system, said meter consisting of a flow duct at whose ends a transducer (4) is suspended centrally. The suspension is performed by means of dome-shaped unit (8), which is optionally provided with a cavity in which the transducer (4) may be placed, said dome-shaped unit being connected to ribs (7) whose opposite ends are terminated by a ring (8) or being connected to a plate having through bores. Power feeding of the transducer takes place through lines (13) running inside one of the ribs (7). The transducer (4) with suspension is secured to the flow duct at the ends thereof in a small pipe section capable of receiving a gasket ring (6) on which the ring (8) is placed, and the entire assembly is tightened by means of a nut (5). This results in a structure which takes up little space and is extremely flexible when the transducer (4) is to be replaced.

Description

A device for determining the amount of liquid flowing through a piping system.
The invention concerns a device for determining the flow amount of liquid in a pipe system, said pipe system hav¬ ing inserted therein an ultrasonic meter which consists of a flow duct at whose ends a first measuring transducer and a second measuring transducer, respectively, are ar- ranged, said measuring transducers being suspended cen¬ trally at the ends of the flow duct.
Danish Published Application No. 161258 discloses a meas¬ uring device in which a transducer is mounted at the ends of a measuring pipe. The liquid whose flow amount is to be determined is conveyed via an inlet distribution cham¬ ber to a transducer, which is mounted at one end of a flow duct, and further through the flow duct to the other end at which a second transducer is mounted. This device thus involves a system in which liquid is conveyed into distribution chambers which are staggered with respect to the axial direction of the measuring path. This known de¬ vice therefore requires some mounting space because of the position of the distribution chambers.
European Patent Specification No. 88235 discloses a de¬ vice of the type defined in the introductory portion of claim 1. This known transducer, too, incorporates distri¬ bution chambers which are positioned axially with the flow duct itself in one embodiment. The transducers are suspended centrally in the distribution chambers to the flow duct, without it being indicated at all how the sus¬ pension is constructed.
Accordingly, the object of the invention is to provide a device of the type defined in the introductory portion of claim 1 which takes up less space and is moreover inex¬ pensive to produce.
The stated object is achieved by the device of claim 1, which is characterized in that the measuring transducers are suspended at the ends of the flow duct, and that they are suspended by rib-shaped means or from a plate having one or more through bores, the size and shape of said through bores being dimensioned for a given liquid flow.
This results in a slender structure, since space-consum¬ ing distribution chambers are no longer required.
When, as stated in claim 3, the transducers are suspended from four ribs, a sturdy suspension is obtained, capable of foxedly securing the transducers even at high liquid flow rates.
When the ribs, at the ends facing away from the trans- ducer, are secured to a ring having an external diameter which corresponds to the diameter of the ends of the in¬ ternal diameter of the flow duct, it is ensured that the transducers are easy to mount in the flow duct.
Further, it is an advantage that electrical connections to the transducers are run inside one of the ribs, since this ensures that the lines do not interfere with the ac¬ tual flow in any way.
With a view to relieving the transducers during the pas¬ sage of the liquid, it is an advantage to mount a dome- shaped unit which has a plane face having essentially the same diameter as the diameter of the transducers. It is a further advantage when the dome-shaped unit has a cavity extending from the plane face to receive the transducer, as the transducer is hereby protected well.
As the done-shaped unit is secured to the ribs, the transducer is retained very stably and fixedly in the dome-shaped unit.
If the ribs have a curved shape along their axis of sym- metry, such as a convex or tray shape with a plane face from which the curvature begins at each side of the per¬ pendicular axis of symmetry of the plane face, it is en¬ sured that the liquid flow through the duct is disturbed as little as possible.
Expedient embodiments of the device of the invention are defined in the dependent claims in general.
The invention will now be explained more fully with ref- erence to an example shown in the drawing, in which:
fig. 1 is sectional view of the device according to the invention,
fig. 2 shows the transducer with suspension according to the invention,
fig. 3 shows a dome-shaped unit to protect the trans¬ ducer,
fig. 4 is a perspective view of an embodiment of a rib to secure the transducer, and
fig. 5 is a cross-sectional view of a ring to secure the ribs of fig. 4. As will be seen in fig. 1, a device for determining the flow of a liquid in a pipe system consists of a pipe 1 having a duct 3 which is terminated at both ends by a funnel 2. A small pipe section having threads is arranged in extension of the funnel 2 and is intended to receive a gasket ring 6 adapted to engage the bottom of the small pipe section. A transducer 4 may be engaged at the oppo¬ site side of the gasket ring 6 and be tightened by means of a nut 5.
As shown in fig. 2, the transducer 4 is suspended cen¬ trally by means of ribs 7, whose opposite ends with re¬ spect to the transducer are terminated by a ring 8.
This structure may be inserted in a simple manner by means of the gasket ring 6 and be tightened by means of the nut 5, as shown in fig. 1.
Fig. 3 schematically shows an embodiment in which the transducer 4 is protected by a dome-shaped unit 8, which has a base face 13 having essentially the same diameter as the transducer 4. In general, the dome-shaped unit may be constructed with a depression (not shown) in which the transducer may be positioned and be well protected there.
Fig. 4 shows a preferred embodiment of the ribs 7, as these are formed with a convex or tray shape, which also contributes to ensuring that liquid flowing through the flow duct 3 of fig. 1 is disturbed as little as possible.
Finally, fig. 5 shows a cross-section of the ring 8 which has two faces 11, 12 capable of engaging the small pipe in fig. 1, more particularly the gasket ring 6 with the face 12 and with the face 11 along the inner surface of the small pipe. Fig. 5 additionally shows that the ring 10 has a curved surface 10 which may be dimensioned for the funnel 2 in fig. 1 so that the face 10 merges evenly into the funnel 2.
Although the invention has been explained in connection with a particular embodiment according to figs. 1 to 5, nothing prevents it from being modified within the scope of the invention. For example, the dome-shaped unit may be shaped more pointedly than shown in fig. 3. The same applies to the ribs shown in fig. 2 and fig. 4.

Claims

P a t e n t C l a i m s
1. A device for determining the flow of liquid in a pipe system, said pipe system having inserted therein an ul¬ trasonic meter which consists of a pipe (1) having a flow duct (3) at whose ends a first measuring transducer (4) and a second measuring transducer, respectively, are ar¬ ranged, said measuring transducers being suspended cen- trally and axially with the flow duct, c h a r a c ¬ t e r i z e d in that the measuring transducers are sus¬ pended at the ends of the flow duct by rib-shaped means or from a plate having one or more through bores, the size and shape of said through bores being dimensioned for a given liquid flow.
2. A device according to claim 1, c h a r a c t e r ¬ i z e d in that the transducers are suspended from four ribs (7) .
3. A device according to claim 1, c h a r a c t e r ¬ i z e d in that the through bores are circular holes or elongate holes positioned concentrically with respect to the centre of the transducer.
4. A device according to claim 1 or 2, c h a r a c ¬ t e r i z e d in that ribs (7), at the ends facing away from the transducers (4), are secured to a ring (8) hav¬ ing an external diameter which corresponds to the diame- ter of the ends of the internal diameter of the flow duct (3) .
5. A device according to one of claims 1, 2 or 4, c h a r a c t e r i z e d in that electrical connections (13) to the transducers are run inside one of the ribs.
6. A device according to one of claims 1-5, c h a r ¬ a c t e r i z e d in that a dome-shaped unit (8) is ar¬ ranged in front of the transducers, said unit having a plane face (13) of essentially the same diameter as the diameter of the transducers.
7. A device according to claim 6, c h a r a c t e r ¬ i z e d in that the dome-shaped unit (8) has a cavity extending inwards from the plane face (30) to receive the transducer.
8. A device according to claim 6 or 7, c h a r a c ¬ t e r i z e d in that the dome-shaped unit is secured to the ribs (7) .
9. A device according to any one of claims 1, 2 or 3-8, c h a r a c t e r i z e d in that the ribs have a curved shape along their axis of symmetry, such as a convex or a tray shape (9) having a plane face (14) from which the curvature begins at each side of the perpendicular axis of symmetry of the plane face.
10. A device according to any one of the preceding claims, c h a r a c t e r i z e d in that it is con- structed as an independent, exchangeable unit.
11. A device according to any one of the preceding claims, c h a r a c t e r i z e d in that the flow duct is constructed as a pipe (1) which expands at the ends, e.g. like a funnel (2), or a concavely shaped pipe.
12. A device according to claims 4-11, c h a r a c ¬ t e r i z e d in that the ring (8) is constructed such that it forms an extension of the flow duct (3), with a smooth transition between the ring and the funnel.
13. A device according to any one of the preceding claims, c h a r a c t e r i z e d in that the suspension is made of plastics, optionally enclosed by metal.
14. A device according to claims 6-13, c h a r a c ¬ t e r i z e d in that when the transducer is suspended at the inlet to the flow duct, the dome-shaped unit and the curved face of the ribs are oriented in a direction away from the inlet to the flow duct.
15. A device according to claims 6-13, c h a r a c ¬ t e r i z e d in that when the transducer is suspended at the outlet of the flow duct, the dome-shaped unit is oriented in a direction out of the flow duct, while the curved faces of the ribs are oriented inwards toward the outlet of the flow duct.
PCT/DK1996/000377 1995-09-11 1996-09-10 A device for determining the amount of liquid flowing through a piping system WO1997010490A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU67863/96A AU6786396A (en) 1995-09-11 1996-09-10 A device for determining the amount of liquid flowing through a piping system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK0994/95 1995-09-11
DK99495 1995-09-11

Publications (1)

Publication Number Publication Date
WO1997010490A1 true WO1997010490A1 (en) 1997-03-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1996/000377 WO1997010490A1 (en) 1995-09-11 1996-09-10 A device for determining the amount of liquid flowing through a piping system

Country Status (2)

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AU (1) AU6786396A (en)
WO (1) WO1997010490A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6390626B2 (en) 1996-10-17 2002-05-21 Duke University Image projection system engine assembly
US6473236B2 (en) 1998-10-23 2002-10-29 Duke University Projection lens and system
EP1887328A1 (en) * 2006-08-08 2008-02-13 Siemens VDO Automotive AG Coaxially mounted ultrasound mass flow meter
DE202008014619U1 (en) * 2008-11-04 2009-12-24 Junker, Raul Ultrasonic flow meter
DE202009011310U1 (en) * 2009-08-19 2010-09-30 Junker, Raul Ultrasonic flowmeter with universal sensor carrier
CN102829895A (en) * 2012-04-25 2012-12-19 合肥瑞纳表计有限公司 Current stabilizer for ultrasonic heat meter
EP2759806A1 (en) * 2013-01-29 2014-07-30 Itron France Ultrasonic flow meter
EP2824429A1 (en) * 2013-07-12 2015-01-14 Gill Corporate Limited An ultrasonic flowmeter

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2339631A1 (en) * 1972-08-09 1974-03-07 Saratoga Systems FLOW AND SOUND SPEED METERS AND MEASURING METHODS
EP0152132A1 (en) * 1984-01-27 1985-08-21 N.V. Nederlandsche Apparatenfabriek NEDAP An ultrasonic flow meter
EP0202583A1 (en) * 1985-05-21 1986-11-26 Siemens Aktiengesellschaft Flow meter
EP0538930A1 (en) * 1991-10-25 1993-04-28 Schlumberger Industries Apparatus for measuring the speed of a flowable medium

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2339631A1 (en) * 1972-08-09 1974-03-07 Saratoga Systems FLOW AND SOUND SPEED METERS AND MEASURING METHODS
EP0152132A1 (en) * 1984-01-27 1985-08-21 N.V. Nederlandsche Apparatenfabriek NEDAP An ultrasonic flow meter
EP0202583A1 (en) * 1985-05-21 1986-11-26 Siemens Aktiengesellschaft Flow meter
EP0538930A1 (en) * 1991-10-25 1993-04-28 Schlumberger Industries Apparatus for measuring the speed of a flowable medium

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6390626B2 (en) 1996-10-17 2002-05-21 Duke University Image projection system engine assembly
US6746122B2 (en) 1996-10-17 2004-06-08 Duke University Image projection system engine assembly
US6473236B2 (en) 1998-10-23 2002-10-29 Duke University Projection lens and system
EP1887328A1 (en) * 2006-08-08 2008-02-13 Siemens VDO Automotive AG Coaxially mounted ultrasound mass flow meter
DE102006037059A1 (en) * 2006-08-08 2008-02-14 Siemens Ag Method for air mass measurement and air mass sensor
DE202008014619U1 (en) * 2008-11-04 2009-12-24 Junker, Raul Ultrasonic flow meter
DE202009011310U1 (en) * 2009-08-19 2010-09-30 Junker, Raul Ultrasonic flowmeter with universal sensor carrier
CN102829895A (en) * 2012-04-25 2012-12-19 合肥瑞纳表计有限公司 Current stabilizer for ultrasonic heat meter
EP2759806A1 (en) * 2013-01-29 2014-07-30 Itron France Ultrasonic flow meter
EP3798583A1 (en) * 2013-01-29 2021-03-31 Itron Global SARL Ultrasonic flow meter
EP2824429A1 (en) * 2013-07-12 2015-01-14 Gill Corporate Limited An ultrasonic flowmeter
US9261389B2 (en) 2013-07-12 2016-02-16 Gill Corporate Limited Ultrasonic flowmeter

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Publication number Publication date
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