EP0581636B1 - Stromverbesserer für eine Entspannungsstation und Messvorrichtung - Google Patents

Stromverbesserer für eine Entspannungsstation und Messvorrichtung Download PDF

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Publication number
EP0581636B1
EP0581636B1 EP19930401809 EP93401809A EP0581636B1 EP 0581636 B1 EP0581636 B1 EP 0581636B1 EP 19930401809 EP19930401809 EP 19930401809 EP 93401809 A EP93401809 A EP 93401809A EP 0581636 B1 EP0581636 B1 EP 0581636B1
Authority
EP
European Patent Office
Prior art keywords
flow rectifier
rectifier
flow
rectifier according
main section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19930401809
Other languages
English (en)
French (fr)
Other versions
EP0581636A1 (de
Inventor
Luc Ogez
Jérôme Deye
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Itron Soluciones de Medida Espana SA
Schlumberger SA
Original Assignee
Itron Soluciones de Medida Espana SA
Schlumberger SA
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 Itron Soluciones de Medida Espana SA, Schlumberger SA filed Critical Itron Soluciones de Medida Espana SA
Publication of EP0581636A1 publication Critical patent/EP0581636A1/de
Application granted granted Critical
Publication of EP0581636B1 publication Critical patent/EP0581636B1/de
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/09—Component parts or accessories
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
    • E03B7/072—Arrangement of flowmeters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
    • F15D1/00—Influencing flow of fluids
    • F15D1/02—Influencing flow of fluids in pipes or conduits

Definitions

  • the present invention relates to a flow rectifier. She applies in particular to fluid flow conditioning before counting this flow. She finds an application particularly advantageous in a relaxation and counting.
  • rectifiers we know different types. The simplest of them is formed by a flat plate adapted to dimensions of the pipe in which the fluid circulates and pierced with holes allowing the flow.
  • this plate can be pierced with an orifice central of larger diameter than the holes and not modifying not the velocity profile near the flow axis.
  • the rectifier is composed of a first plate pierced with holes.
  • This first plaque has a smaller diameter than the pipe for which the rectifier is designed.
  • the first plate is attached by a cylinder to a crown having a diameter outside equal to the diameter of the pipe for which the rectifier is designed. This crown is pierced with holes in the same way as the first plate.
  • a relaxation station is composed of a large number of elements (filters, pressure reduction chamber, control valves, counter ). For reasons practical, we seek to reduce the total size.
  • the rectifier itself may be a few D in length, which further adds to the overall size.
  • the present invention overcomes these drawbacks.
  • the size of the device is reduced because the straightening of the speed profile can be obtained directly after the fluid has passed through the rectifier and on the other hand, found that the measurement accuracy of meters, especially but not only turbine meters, is improved compared to the situation anterior.
  • a flow rectifier according to the invention also has the advantage of be able to operate with the same efficiency regardless of direction fluid inlet.
  • the flux rectifier according to the invention can as well be placed in a straight pipe only at the end of an elbow.
  • the present invention relates to a flow straightener comprising a main part intended to be placed upstream, this part having a surface with symmetry of revolution around a central axis, according to claim 1.
  • the main part may be truncated.
  • the main truncated part has one end closed by a circular plate pierced with holes.
  • the main part is surrounded by a crown pierced with holes.
  • the main part has a longitudinal extension included in a range from 0.6 D to 2.8 D, D being the largest diameter of the rectifier.
  • the main part is cone-shaped.
  • the cone has a circular base of diameter adapted to the diameter of a pipe in which the rectifier is intended to be mounted.
  • the cone has a generator making an angle with the central axis in a range from 10 ° to 40 °.
  • a flow rectifier according to the invention has a void rate in a range from 30% to 50%.
  • the present invention also relates to a relaxation station and metering system including a flow rectifier in accordance with minus one of the characteristics described above, the rectifier being mounted upstream and in the immediate vicinity counting means.
  • the flow rectifier 10 is fixed between two cylindrical pipes 12, 13 by a crown of peripheral attachment 14.
  • the rectifier 10 has a main part 16 placed upstream.
  • This main part 16 has a surface with symmetry of revolution around the central axis A. The surface is generated by a curve with re-entrant curvature relative to the central axis A, this curve passing through a fixed point on the central axis AT.
  • the longitudinal extension L of the main part 16 is for example in a range from 0.6 D to 2.8 D where D is the diameter of the pipe 13 and therefore corresponds to the largest diameter of the rectifier. It may be equal to 1.3 D.
  • the rectifier is pierced with holes 17 to allow the passage of the fluid.
  • the void rate that is to say the percentage of void space relative to the space occupied by the material, is for example comprised in a range going from 30% to 50%.
  • the vacuum rate may be equal to 40%.
  • the rectifier 10 may be made of steel or any other rigid material and compatible with the fluid. As can be understood from the view in FIG. 1A, the flow rectifier makes it possible to obtain an axisymmetric speed profile such that the volume flow rate of fluid in the vicinity of the central axis A is greater than the peripheral volume flow rate and this from any speed profile.
  • the shape of the main part concentrates the speed profile in the central zone in the vicinity of the axis A maintaining the rate of turbulence in the vicinity of the central axis of the order of 4%.
  • the fluid crosses the main part and acquires, as it passes, velocity components perpendicular to the wall crossed, which achieves the desired effect at a distance downstream of the rectifier which depends on the geometric parameters of the main part such as the curvature of the surface and the inclination of a generator with respect to the axis A.
  • the main part 16 is truncated.
  • the end therefore has an opening 15 whose diameter d is at most 30% of the diameter D of the pipe 13.
  • the main part 16 is truncated and closed by a circular plate 18 whose diameter d is at most equal to 30% of the diameter D of the pipe. 13.
  • the choice of the diameter d is made according to the desired speed profile: the larger the diameter d, the more the profile will be flattened.
  • the base of the main part 16 is surrounded by a crown 20 pierced with holes.
  • the crown 20 can have a width I included in a range from 0 D to 1/3 D. It allows to increase the efficiency of the rectifier in the vicinity of walls: The pressure drop is sharp and therefore the fluid speed is decreased.
  • FIGS. 5A and 5B respectively show in section and in perspective an advantageous embodiment because it is simple to carry out.
  • the main part 16 of the rectifier has the shape of a cone.
  • the angle a that a cone generator makes with the central axis A is in a range from 10 ° to 40 ° and can for example be equal to 20 °.
  • the longitudinal extension of the cone is equal to ⁇ 1.4 D, the circular base of the cone having a diameter equal to D.
  • the void rate of the holey plate forming the cone can be 40%.
  • the cone shape of FIG. 5A can be associated with the variants of FIGS.
  • the cone can be truncated, and possibly closed at its end by a flat plate with holes or the base circular of the cone may have a diameter less than D, the cone being integral with a perforated peripheral crown.
  • a flow rectifier according to the invention in one or other of its variant embodiments finds an advantageous application in an expansion and counting station and in particular when the counting means are constituted by a turbine meter.
  • FIG. 6 schematically represents an expansion and counting station.
  • a station is made up of a set of elements connected together by pipes in configurations which depend on the intended use.
  • the station is constituted by the following succession of elements given in the direction of circulation of the fluid: an electrical insulating joint 30, a first valve 32, a filter 34, the regulator 36, the flow rectifier 10, the counter 38, and a second valve 40.
  • the flow rectifier 10 is a cone. In this particular configuration, the rectifier is arranged in a direction perpendicular to the direction of arrival of the flow. The rectifier is placed in the immediate vicinity of the counter 38, that is to say at a distance of less than 0.5 D.
  • Such a configuration makes it possible to reduce the size of the station since the rectification takes place directly downstream of the rectifier 10 and not after the fluid has traveled a distance of a few D.
  • the combination of a rectifier as described above and a counter, for example with a turbine makes it possible to obtain an accuracy of 0 to 0.5% on the counting.

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measuring Volume Flow (AREA)
  • Details Of Flowmeters (AREA)

Claims (10)

  1. Mit Löchern durchsetzter Strömungsgleichrichter (17) mit einem eingangsseitig einzusetzenden Hauptteil (16), der eine um eine Mittelachse (A) rotationssymetrische Fläche aufweist, dadurch gekennzeichnet, daß die Fläche von einer Kurve erzeugt wird, die in einer die Mittelachse aufweisenden Ebene einen Winkel (a) mit der Mittelachse bildet, und daß bei einer Verschiebung von eingangsseitig zu ausgangsseitig der Winkel (a) zunimmt oder konstant bleibt, wobei aus der Kurve dann eine Gerade wird.
  2. Strömungsgleichrichter nach Anspruch 1, dadurch gekennzeichnet, daß der Hauptteil (16) kegelstumpfförmig ist.
  3. Strömungsgleichrichter nach Anspruch 2, dadurch gekennzeichnet, daß der Hauptteil (16) ein von einer kreisförmigen Platte (18) geschlossenes Ende aufweist, wobei die Platte mit Löchern (17) durchsetzt ist.
  4. Strömungsgleichrichter nach Anspruch 1, dadurch gekennzeichnet, daß der Hauptteil (16) mit einem Kranz (20) umbegen ist, der mit Löchern (17) durchsetzt ist.
  5. Strömungsgleichrichter nach Anspruch 1, dadurch gekennzeichnet, daß der Hauptteil (16) eine Längserstreckung (L) in einem Bereich zwischen 0,6 D und 2,8 D aufweist, wobei D der größte Durchmesser des Gleichrichters ist.
  6. Strömungsgleichrichter nach Anspruch 1, dadurch gekennzeichnet, daß der Hauptteil (16) die Form eines Konus aufweist.
  7. Strömungsgleichrichter nach Anspruch 6, dadurch gekennzeichnet, daß der Konus eine kreisförmige Basis aufweist, deren Durchmesser dem Durchmesser einer Leitung angepaßt ist, an welcher der Gleichrichter anzubringen ist
  8. Strömungsgleichrichter nach Anspruch 6, dadurch gekennzeichnet, daß der Konus eine Mantellinie aufweist, die mit der Mittelachse (A) einen Winkel bildet, der in einem Bereich von 10° bis 40° liegt.
  9. Strömungsgleichrichter nach Anspruch 1, dadurch gekennzeichnet, daß er ein Vakuumgrad zwischen 30% und 50% hat.
  10. Entspannungs- und Zählstation, dadurch gekennzeichnet, daß sie einen Strömungsgleichrichter nach einem der Ansprüche 1 bis 9 aufweist, welcher eingangsseitig und in der unmittelbaren Nähe der Zählmittel (38) angebracht ist.
EP19930401809 1992-07-29 1993-07-13 Stromverbesserer für eine Entspannungsstation und Messvorrichtung Expired - Lifetime EP0581636B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9209509A FR2694345B1 (fr) 1992-07-29 1992-07-29 Redresseur de flux et poste de détente et de comptage comprenant un tel redresseur de flux.
FR9209509 1992-07-29

Publications (2)

Publication Number Publication Date
EP0581636A1 EP0581636A1 (de) 1994-02-02
EP0581636B1 true EP0581636B1 (de) 2000-05-10

Family

ID=9432500

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930401809 Expired - Lifetime EP0581636B1 (de) 1992-07-29 1993-07-13 Stromverbesserer für eine Entspannungsstation und Messvorrichtung

Country Status (3)

Country Link
EP (1) EP0581636B1 (de)
DE (1) DE69328592D1 (de)
FR (1) FR2694345B1 (de)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH289617A (de) * 1951-04-25 1953-03-31 Neuschwander Paul Strahlregler mit Filter.
GB1490188A (en) * 1974-02-07 1977-10-26 Secr Defence Jet catchers

Also Published As

Publication number Publication date
FR2694345B1 (fr) 1994-10-07
EP0581636A1 (de) 1994-02-02
FR2694345A1 (fr) 1994-02-04
DE69328592D1 (de) 2000-06-15

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