EP2737218A1 - Redresseur d'écoulement - Google Patents

Redresseur d'écoulement

Info

Publication number
EP2737218A1
EP2737218A1 EP12733028.0A EP12733028A EP2737218A1 EP 2737218 A1 EP2737218 A1 EP 2737218A1 EP 12733028 A EP12733028 A EP 12733028A EP 2737218 A1 EP2737218 A1 EP 2737218A1
Authority
EP
European Patent Office
Prior art keywords
holes
center
perforated plate
hole
diameter
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.)
Withdrawn
Application number
EP12733028.0A
Other languages
German (de)
English (en)
Inventor
Hanno Schultheis
Sascha Kamber
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.)
Endress and Hauser Flowtec AG
Original Assignee
Endress and Hauser Flowtec AG
Flowtec AG
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 Endress and Hauser Flowtec AG, Flowtec AG filed Critical Endress and Hauser Flowtec AG
Publication of EP2737218A1 publication Critical patent/EP2737218A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F15D1/025—Influencing flow of fluids in pipes or conduits by means of orifice or throttle elements
    • 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
    • G01F15/02—Compensating or correcting for variations in pressure, density or temperature

Definitions

  • the present invention relates to a flow straightener, in particular a flow straightening plate comprising a perforated plate (6) with a
  • Fig. 2 shows an embodiment of a flow straightener according to the invention.
  • FIG. 1 a common flow straightener is shown. It has become known as "Laws Flow Rectifier.”
  • a perforated plate 6 has holes 1, 2, 3 with three different hole diameters, the largest one being at the center of the perforated plate 6.
  • the other holes 2 and 3 are at two arranged concentric hole circles.
  • Fig. 2 illustrates an embodiment of an inventive
  • Flow rectifier which comprises a perforated plate 6 with an approximately circular baffle, in plan view and in section. Again, the perforated plate 6 holes 1, 2, 3, 4, 5 on concentric holes around the hole
  • the perforated plate 6 In operation, the perforated plate 6 is impinged by a fluid which penetrates the holes 1, 2, 3, 4, 5.
  • the perforated plate 6 can be flowed through on its entire diameter P or it is only on a circular section with a diameter D flows, which the
  • the perforated plate has a
  • Diameter P of 150 mm It is suitable to be inserted between two flanges of two pipes of a pipeline, for which they have four holes 7 on a further bolt circle K with 125 mm, each with a diameter B.
  • the diameter D of the baffle surface of the perforated plate 6, that is the part of the perforated plate 6, which is flowed by the fluid flowing in the said pipe, is here 54.5 mm. It corresponds to the inner diameter of the pipeline.
  • the first hole 1 of the perforated plate 6 has a first diameter di
  • the second holes 2 of the perforated plate 6 each have a second diameter d 2
  • the third holes 3 of the perforated plate 6 each have a third diameter d 3
  • the fourth holes 4 the perforated plate 6 each have a fourth diameter d
  • the fifth holes 5 of the perforated plate 6 each have a fifth one
  • Diameter ds wherein the center of the first hole 1 in the center of the baffle, which here is the perforated plate 6 is located, the centers of the second holes 2 lie on a first circle hole around the center of the baffle Li, the centers of the third Holes 3 on a second circle of holes L 2 lie around the center of the baffle surface, the centers of the fourth holes 4 are on a third circle L 3 around the center of the baffle, and wherein the centers of the fifth holes 5 on a fourth circle hole L 4 to the
  • the holes 1, 2, 3, 4 and 5 are included approximately circular. Also, the diameters d i, d 2 , d 3 , d 4 and ds are not specifically dimensioned in the figure.
  • the first hole 1 is larger than the second hole 2 - it has a larger diameter di.
  • the second holes 2 have a larger diameter d 2 than the third holes 3, which in turn have a larger diameter d3 than the fourth holes 4, wherein the fourth holes 4 are again larger than the fifth holes.
  • the fourth bolt circle has the largest diameter L 4 and is furthest from the center of the baffle.
  • Bolt circle lie between the first and fourth bolt circle. They each have a diameter L 2 and L 3 , which are each smaller than the diameter L 4 of the fourth circle and larger than the diameter of the first circle of holes Li, wherein the diameter L 3 of the third circle of holes is equal to or greater than the diameter L 2 of the second pitch circle. According to one embodiment of the invention, it is larger and it is L 2 ⁇ L 3 .
  • the diameters d 3 and d 4 of the third and fourth holes 3 and 4 and the diameters L 2 and L 3 of the second and third pitch circle satisfy further conditions: 0.75 * d 3 ⁇ d 4 and 1.75 * L 2 > L 3 .
  • the general rule is: 0.25 * D ⁇ Li ⁇ 0.50 * D and / or 0.50 * D ⁇ L 2 ⁇ 0.75 * D and / or 0 , 55 * D ⁇ L 3 ⁇ 0.80 * D and / or 0.75 * D ⁇ L 4 ⁇ 1 * D and / or 0.15 * D ⁇ di ⁇ 0.18 * D and / or 0.13 * D ⁇ d 2 ⁇ 0.16 * D and / or 0.12 * D
  • a further formed perforated plate 6 has the following relative dimensions: 0.34 * D ⁇ Li ⁇
  • the individual holes at a distance from one another, which is at least 0.001 * D, in particular at least 0.1 mm, according to one embodiment even at least 0.5 mm.
  • the distances are between two, the respective hole limiting hole edges.
  • the distances between two adjacent first and second holes and two adjacent second and third holes are indicated by a12 and a23.
  • a12 ⁇ a23 All holes do not overlap.
  • a distance of the centers of two holes is thus at least half the sum of their respective diameters added with 0.001 * D.
  • a third hole 3 at an angle of 10 ° to 50 °, in particular at an angle of exactly 30 °, to a straight line through the center of the baffle and through the center of an adjacent fourth hole 4.
  • the respective holes 1, 2, 3, 4 and 5 are arranged symmetrically about the center of the circular baffle on the perforated plate 6.
  • the second holes lie, for example, packed hexagonally close to the first hole on the second circle of holes.
  • the holes 1, 2, 3, 4 and 5 of the perforated plate 6 each have a chamfer.
  • the holes are sharp-edged, but can also be chamfered on one or both sides, for example by means of a
  • the size of the chamfer can be selected depending on the respective hole diameter or is constant for all holes 1, 2, 3, 4 and 5.
  • the above dimensions are chosen so that a passage area through the baffle formed by the holes, in a ratio greater than 0.5 to the baffle.
  • a flow straightener according to the invention is e.g. upstream of a flow meter, in particular an industrial flow meter
  • Process measuring technology for example, a thermal mass flow meter, used in a pipeline. This use is for example for reducing a so-called inlet length upstream of the flow meter, e.g. after a
  • Curvature of the pipeline ie downstream of a bend in the pipeline, meaningful.
  • Flow equalizer and the flow meter is then for example less than 3 * D.
  • the equally sized length of the distance between the end of the pipe bend and the flow straightener is for example less than 5 * D.
  • Particularly suitable flow straightener according to the invention in flows in the laminar, transient and turbulent region, especially for gases.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Air-Flow Control Members (AREA)
  • Pipe Accessories (AREA)
  • Duct Arrangements (AREA)

Abstract

L'invention concerne un redresseur d'écoulement comprenant une plaque perforée (6) laquelle a une surface de réception de forme approximativement circulaire et laquelle reçoit, lors du fonctionnement, un écoulement d'un fluide et laquelle présente un diamètre D, la plaque perforée (6) présentant un premier trou ayant un premier diamètre d1, le centre du premier trou (1) étant situé au centre de ladite plaque perforée, la plaque perforée (6) présentant de deuxièmes trous (2) ayant un deuxième diamètre d2, les centres des deuxièmes trous (2) étant situés sur un premier cercle de trous L1 qui entoure le centre de ladite plaque perforée, la plaque perforée (6) présentant de troisièmes trous (3) ayant un troisième diamètre d3, les centres des troisièmes trous (3) étant situés sur un deuxième cercle de trous L2 qui entoure le centre de ladite plaque perforée, la plaque perforée (6) présentant de quatrièmes trous (4) ayant un quatrième diamètre d4, les centres des quatrièmes trous (4) étant situés sur un troisième cercle de trous L2 qui entoure le centre de ladite plaque perforée, la plaque perforée (6) présentant de cinquièmes trous (5) ayant un cinquième diamètre d5, les centres des cinquièmes trous (5) étant situés sur un quatrième cercle de trous L4 qui entoure le centre de ladite plaque perforée, avec : L1 < L2 ≤ L3 < L4 et d1 > d2 > d3 > d4 > d5 et 0,75*d3 < d4 et 1,75*L2 > L3.
EP12733028.0A 2011-07-28 2012-06-27 Redresseur d'écoulement Withdrawn EP2737218A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011079993A DE102011079993A1 (de) 2011-07-28 2011-07-28 Strömungsgleichrichter
PCT/EP2012/062407 WO2013013924A1 (fr) 2011-07-28 2012-06-27 Redresseur d'écoulement

Publications (1)

Publication Number Publication Date
EP2737218A1 true EP2737218A1 (fr) 2014-06-04

Family

ID=46466459

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12733028.0A Withdrawn EP2737218A1 (fr) 2011-07-28 2012-06-27 Redresseur d'écoulement

Country Status (3)

Country Link
EP (1) EP2737218A1 (fr)
DE (1) DE102011079993A1 (fr)
WO (1) WO2013013924A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015105058A1 (de) * 2015-04-01 2016-10-06 Endress+Hauser Flowtec Ag Strömungsgleichrichter
CN108007514B (zh) * 2017-11-29 2019-12-31 成都市三宇仪表科技发展有限公司 一种水表整流器
CN108317129B (zh) * 2018-01-09 2019-06-11 浙江大学 一种针对液压机油箱的冷凝管道快速主动散热开孔方法
DE102019108551A1 (de) * 2019-04-02 2020-10-08 Endress+Hauser Flowtec Ag Prozessanschluss zum Verbinden eines Durchflussmessgerätes mit einer Rohrleitung, Feldgerät der Automatisierungstechnik und Verfahren zur Befestigung eines Strömungsgleichrichters an einem Prozessanschluss

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3840051A (en) 1971-03-11 1974-10-08 Mitsubishi Heavy Ind Ltd Straightener
DE69016658T2 (de) * 1989-07-20 1995-10-05 Univ Salford Business Services Strömungskonditionierer.
US5495872A (en) 1994-01-31 1996-03-05 Integrity Measurement Partners Flow conditioner for more accurate measurement of fluid flow
FR2776033B1 (fr) * 1998-03-13 2000-08-18 Gaz De France Conditionneur d'ecoulement pour canalisation de transport de gaz
EP1188935A2 (fr) * 2000-09-15 2002-03-20 Daniel Industries, Inc., Conditionneur d'écoulement d'un gaz humide
US6951617B2 (en) * 2003-09-16 2005-10-04 Purepise Technologies, Inc. Method and apparatus for controlling flow profile to match lamp fluence profile
DE102006046252A1 (de) * 2005-10-06 2007-04-19 Zenner International Gmbh & Co. Kg Vorrichtung zum Vereinheitlichen eines Strömungsprofils und Wasserzähler

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2013013924A1 *

Also Published As

Publication number Publication date
DE102011079993A1 (de) 2013-01-31
WO2013013924A1 (fr) 2013-01-31

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