WO2019220469A1 - Grille fine racing adaptée pour être intégrée dans une prise d'eau - Google Patents

Grille fine racing adaptée pour être intégrée dans une prise d'eau Download PDF

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Publication number
WO2019220469A1
WO2019220469A1 PCT/IT2018/000072 IT2018000072W WO2019220469A1 WO 2019220469 A1 WO2019220469 A1 WO 2019220469A1 IT 2018000072 W IT2018000072 W IT 2018000072W WO 2019220469 A1 WO2019220469 A1 WO 2019220469A1
Authority
WO
WIPO (PCT)
Prior art keywords
fine
water
rake
section
fine rake
Prior art date
Application number
PCT/IT2018/000072
Other languages
German (de)
English (en)
Inventor
Markus Wild
Original Assignee
Wild Metal Srl
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 Wild Metal Srl filed Critical Wild Metal Srl
Priority to PCT/IT2018/000072 priority Critical patent/WO2019220469A1/fr
Publication of WO2019220469A1 publication Critical patent/WO2019220469A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B5/00—Artificial water canals, e.g. irrigation canals
    • E02B5/08—Details, e.g. gates, screens
    • E02B5/085—Arresting devices for waterborne materials, e.g. gratings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/44—Edge filtering elements, i.e. using contiguous impervious surfaces
    • B01D29/445—Bar screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/18—Filters characterised by the openings or pores
    • B01D2201/184—Special form, dimension of the openings, pores of the filtering elements

Definitions

  • the invention relates to a fine rake, which is suitable to be installed in a water intake, according to the preamble of claim 1.
  • a water intake is adoptedstelit in this watercourse that in the Strömungska channel of the water intake flows a water flow , At least part of this water flow then flows through at least one rake, which is part of the water intake, and then flows into a collection channel, which is also part of the water intake.
  • the collecting channel serves to collect the extracted water and to guide it to the intended point of use.
  • a point of use is, for example, a power plant for the generation of electrical energy, in which the supplied extracted water is used to bring a turbine in rotation.
  • such a water intake can also have two rakes, namely a coarse screen and a fine screen, which are flowed through in sequence.
  • a water intake water is removed, from which the entrained foreign bodies were ejected, the size of which is initially greater than the mutual distance between the coarse calculation bars and then subsequently greater than the mutual distance between the fine rule bars.
  • this should be Distance should be as small as possible, so that even small foreign bodies such as the grains of sand can be eliminated from the removed water and the extracted water can also be fed to points of use in which such small foreign body are undesirable.
  • this distance should not be too small, because the smaller this distance, the smaller the flow cross section of the fine bill that is available for the extracted water.
  • Document EP 3 023 165 discloses a fine rake according to the preamble of claim 1.
  • each fine rake In this fine rake, the cross-section of each fine rake is triangular, each one of the three flat legs of the fine rake is part of the fine rake surface on which flows the fine rake overflowing water.
  • the fine rake bars can be detachably fastened as part of the fine rake, so that either each of the three fine rake bar legs can be attached to the o.g. Surface can belong and in the order each of the three fine rake edges can be used by protruding in the flowing water to mechanically shear water layers from the flowing water and dissipate into the fine mesh formed between the fine mesh bars. This will increase the life of each fine-mesh bar.
  • the cross section of the fine rake bars is semicircular and the fine rake bars are arranged such that the various flat surface areas of the fine rake bars form the upper surface on which the fine rake overflowing water flows.
  • This surface corresponds to the surface which is formed in the above-explained fine rake by the various flat fine-rule limbs.
  • the two Swiss The fine rake disclosed above projects one edge of each fine rake rod into the water overflowing the fine rake in order to mechanically shear water layers from the flowing water and to discharge them into the fine rake slots formed between the fine rake rakes.
  • the object of the present invention is therefore to further develop such a fine rake of the type specified that the swallowing performance of the fine rake is significantly increased and thereby the flow of the fine rinsing through and thus ent taken water is increased, in particular by a more effective use of Coandä effect, so that a chen the invention Feinre having water intake in comparison to other water tanks, which have the same dimensions but not the fine screen according to the invention, is more effective.
  • a possible water intake for removing water from a water flow flowing in it, into which a fine screen according to the invention can be installed is e.g. in the document AT 508727 A1 of the applicant.
  • Such a water intake is distinguished from the other known types of water intake by the fact that the upper end of the coarse crush and the upper end of the fine screen have no appreciable mutual displacement both along the vertical direction and along the flow channel longitudinal direction.
  • the fine rake is located directly under the coarse screen and the collection channel is located directly under the fine screen, so that a total drop height of the extracted water is guaranteed, which can be fully utilized and compared to the total fall height is seen in other known water tanks, is smaller.
  • the fine-mesh surface corresponding to this corner-free cross-section surface is edge-free and that means that each fine rule bar just where the water is discharged is a edgeless bar.
  • a first section of the contour of the above-mentioned corner-free cross-section extends along a direction which also has a component lying parallel to the longitudinal direction of the fine rule and directed in the direction of flow of the outflowing water results for the operation of the invention.
  • the water flowing into and thus discharged from a fine-meshed slot flows on a fine-particle surface which also extends along one of the above-mentioned o-ring surfaces. Component having direction extends.
  • a fine-particle surface is most suitable for the commencement of the Coanda effect, because the fine particle screen can support the extracted water through it and thereby combat the effect of gravity, which is known to tend to separate the extracted water from the fine particle surface.
  • the o.g. Surface is not, then the water would flow chaotically to Feinrechenschlitzauslauf, as happens in the known fine rake, in which the water is mecha nically derived from the fine rake, i. due to the impact of the water on the fine screen surface.
  • the first section shown in claim 2 is also curved.
  • the surface of the water cut convexly and the upper layers of the water flow faster than on a straight surface, so more water can be extracted.
  • the contour of the corner-free cross section has a rounded projection, which is directed in the direction of flow of the water flowing from opposite direction and adjoins the first section, a regular partial flow of the flowing Drained water and fed to the fine screen slot, thereby increasing the amount of water removed.
  • a second portion of the contour of the corner-free cross-section extends along a direction which also has a component lying parallel to the longitudinal direction of the fine and directed in the flow direction of the outflowing water.
  • this second section like the first section, joins the rounded projection, but the surface corresponding to this second section is not on the same side of the fine screen on which the surface corresponding to the first section is located other side of the fine atomizer.
  • This second section is to be credited ken, that the respective distance between the two walls of the fine rake slot always has a sufficient size, so as to avoid possible that the flowing on one wall of the fine-rule slot according to the Coandä principle water against the other wall of the fine-prone slot, thereby jeopardizing the Coanda effect.
  • each fine-calculation slot on an outlet opening the width is greater than the width of the inlet opening.
  • the fine-gauge slot widens in the direction of the outlet opening, whereby this enlargement also contributes to maintaining the Coanda effect as long as possible. Namely, it can not be excluded who the that when flowing through the fine-mesh slot through water droplets dissolve from the flowing according to the Coanda principle water. These drops of water become more and more the more you approach the outlet opening.
  • Enlargement provides the necessary space to allow these drops of water to continue chaotically without jeopardizing the Coandä effect and, on the other hand, any small foreign objects still remaining in the water will not be trapped between the fine-grained slot walls or, if so, easier to recover get free.
  • a third section of the contour of the corner-free section of each fine screen is convexly curved and extends along a direction which is also parallel to the longitudinal direction Having the fine rule and directed in the direction of flow of the outflowing water directed direction directed component.
  • This third section follows to the first section. The fact that the component is directed in the opposite direction to the flow direction of the outflowing water, one reaches on both sides of an increasing expansion of the fine-calculation slot. This circumstance also makes it easier to expel any foreign bodies still in the water from the fine-meshed slot
  • At least a portion of the Feinre Chen is concave.
  • at least a portion of the fine rule may be convex.
  • this width is a value which lies between 0.4 mm and 2 mm. It can be in particular 0.6 mm.
  • FIG. 1 is a perspective view of an exemplary water socket incorporating the fine screen of the present invention, the left shoulder of the foundation and support structure of the water socket not shown in FIG. 1 to show the interior of the water socket;
  • FIG. 1 is a perspective view of an exemplary water socket incorporating the fine screen of the present invention, the left shoulder of the foundation and support structure of the water socket not shown in FIG. 1 to show the interior of the water socket;
  • Figure 2 is a perspective view of a longitudinal section of the fine rule according to the invention of Figure 1, alone and in the case of a ers th embodiment of the fine rule bars ..;
  • FIG. 3 shows a front view of the fine rake according to the invention in the case of a first exemplary embodiment of the support means supporting the fine rake bars;
  • Figure 4 is a side detail view of the longitudinal portion of the Feinre Chen of Figure 2;
  • FIGS. 5-8 show a side view, similar to FIG. 4, of a longitudinal section of the fine rake according to the invention in the case of four further exemplary embodiments of the fine rake bars;
  • FIGS. 9 and 10 show a front view similar to FIG. in accordance fine fine each case in the case of a second or third example Auscul tion of the fine rule bars supporting support means.
  • a fine rake 1 is shown schematically, which is suitable to be installed in a water intake.
  • a fine screen 1 can be installed by means of known and not shown fastening means or installation means in each water socket, then a water socket is available, the e.g. what looks like that which is shown schematically in Fig. 1.
  • the reference numeral 2 designates the water socket, which is described in the applicant's document AT 508 727 A1 and which, for removing water from a watercourse, is positioned in this watercourse that in the flow channel 3 of the water socket 2 a Water flow flows.
  • Fig. 1 shows the foundation and support structure of Wasserfas solution 2, which is generally prepared as a concrete structure and arranged in a well-known manner in a watercourse. It comprises a main body and at its sides two shoulders 4, so that on the upper surface of the main body and between the shoulders 4 of Strö mungskanal 3 (in Fig. 1 only indicated) is formed, in which the What serströmung flows from the water is removed. In Fig. 1, only one shoulder 4 can be seen.
  • the water intake 2 also includes a rough rake 5.
  • the rough rake 5 forms a portion of the bottom of the flow channel 3 and serves in particular to excrete the larger foreign body.
  • the fine rake 1 is disposed below the Gro réelles 5 so that the the water flow taken water in the order of the Grobre chen 5 and the fine rake 1 flows through and then flows into a collecting channel 6, which is formed below the Feinrechens 1.
  • This collection channel 6 is formed by two walls of different heights and a bottom on which the removed water flows away in order to reach the intended point of use.
  • the fine rake 1 has fine rake bars 7, 8, 9, 10, 11 arranged transversely to its longitudinal direction A.
  • a total of five Auspar were approximately examples of this fine rule bars 7; 8; 9; 10; 11, FIGS. 7; 8th ; 9; 10; 11 are arranged parallel to each other and close to each other, see e.g. Fig. 2, in which the embodiment is shown with the fine rule bars 7, that each pair of adjacent Feinre chenstäbe 7; 8th ; 9; 10; 11 delimited between each a fine index slot 12.
  • FIG. 2 by way of example only one of the fine rule bars has been designated by the reference numeral 7.
  • FIGS. 2, 4-8 only one of the fine-rule slots has been provided with the reference numeral 12.
  • Each of the fine-rule slots 12 has an inlet opening 12a, the width of which, depending on the degree of excretion of the fine screen 1, is between 0.4 mm and 2 mm. A preferred value for this width is 0.6 mm. Widths that are larger than 2 mm are usually seen before for coarse rakes.
  • Each fine-gauge slot 12 widens in the direction of its outlet opening 12b, because, as is apparent from Figs. 4-8, the outlet opening 12b has a width which is greater than the width of the inlet opening 12a.
  • the water which does not flow into the fine-particle grooves 12 flows along the fine-grain 1 and thereby determines a direction of flow which is represented by the arrow B in FIGS. 2, 4-8.
  • the fine rake 1 can be concave on its side directed toward the coarse rake 5 by having at least one concave section, see for example FIG. 1.
  • Supporting means can also be provided, for example Side member 13; 14; 15, which support the fine rake 1 from below (see Figs. 2, 3, 9 and 10), since this 1 is not built as solid as a rough rake 5. It is also conceivable that the fine rake 1 not only ei nen concave Section but also has a subsequent convex portion (was not drawn in the figures), for example, to then extend straight.
  • the fine rake 1 is advantageously a rake which utilizes the Coanda effect referred to in the previous introduction.
  • at least the part of each fine-particle bar 7 which is intended for the discharge of the withdrawn water and which comes into contact with the withdrawn water has; 8th ; 9; 10; 11 a corner-free cross section.
  • Which part of each fine rake 7; 8th ; 9; 10; 11, which forms according to the invention a part having a corner-free cross-section, will be described in more detail with reference to the exemplary embodiment of the spring rods 11 shown in FIG. 8, the terms below and above referring to the figure.
  • each fine-grain bar 11 is made up of the remaining part of the fine-grain bar 11, which actually forms the main part of the fine-grain bar 11.
  • This main part thus comprises both the upper end of the fine-grain bar 11 and the remaining part of the fine-grain bar 11 extending from top to bottom and the lower part. Thanks to its corner-free cross-section, this main part of the fine-grain bar 11 has edge-free surfaces on which the water flows and which, unlike the surface of the lower and lower end of the fine particles, face the flowing water.
  • a first portion 7a, 8a, 9a, 10a, 11a of the contour of this corner-free cross-section extends along a direction which also has a component parallel to the longitudinal direction A of the fine rule 1 and directed in the flow direction B of the outflowing water.
  • This first section 7a, 8a, 9a; 10a; 11a can be curved, in particular convexly curved, as is apparent from FIGS. 4-8.
  • this first section 7 a; 8a; 9a; 10a; 11a ensures the Coanda effect comes into effect because, as long as the water is supported by the fine rod surface corresponding to sections 7a, 8a, 9a, 10a, 11a, gravity will not be able to detach the adhering water from the fine rake surface.
  • the contour of the corner-free cross-section also has a rounded projection 7 b; 8b; 9b; 10b; 11b, which is directed in the direction opposite to the flow direction B of the outflowing water and opposite to the first portion 7a, 8a, 9a, 10a, 11a.
  • the water which is removed will thus flow along the edge-free fine-rake surface corresponding to the rounded projection 7b; 8b; 9b; 10b; 11b and the first section 7a, 8a, 9a, 10a, 11a.
  • a second section 7 c extends; 8c; 9c; 10c; 11 c of the contour of the corner-free cross-section along a direction which also has a parallel to the longitudinal direction A of the fine rule 1 and directed in the direction of flow B of the effluent water component.
  • This second section 7c; 8c; 9c; 10c; 11c is followed by the rounded projection 7b; 8b; 9b; 10b; 11b.
  • the second section 7 c; 8c; 9c; 10c; 11 c is not located on the same side of the Feinre chenstabes 7; 8th ; 9; 10; 11 on which the first section 7 a; 8a; 9a; 10a; 11 a is located, but on the other side. Also this second section 7c; 8c; 9c; 10c; 11c, like the first section 7a, 8a, 9a; 10a; 11 a, be curved, but he 7c; 8c; 9c; 10c; Like the first section 7a, 8a, 9a, 10a, 11a, 11c is not convexly curved but concavely curved.
  • the removed water dissolves from the respective fine atomizer 7; 8th ; 9; 10; 11 and falls into the underlying collecting channel 6 only when it has passed through the respective outlet opening 12b. Until then, the extracted water follows a path according to the dashed line F1, in the case of the embodiments of FIGS. 7-8, and the dashed lines F1 and F2 in the case of the embodiments of FIGS. 4-6.
  • the dashed lines F1 and F2 have been drawn by way of example only in one of the fine-angle slots 12.
  • the dashed line F1 shown in Figures 4-8 represents the way the water removed when flowing along the edge-free Feinre chenstabober measurements travels that the rounded projection 7 b; 8b; 9b; 10b; 11b and the first section 7a; 8a; 9a; 10a; 11 a corresponds.
  • the dashed line F2 shown only in Figures 4-6 represents the wide ren way that the water removed, after it has covered the path according to the line F1 and in the case of the three illustrated in these figures embodiments of the fine rule bars 7; 8th ; 9, covers.
  • a third section 7d, 8d, 9d of the contour of the corner-free cross-section of each fine-grain bar 7; 8th ; 9 extends along a direction which also has a parallel to the longitudinal direction A of the fine rule 1 and directed in the direction of flow B of the outflowing water opposite direction component.
  • This third section 7d; 8d; 9d is convexly curved and closes at the first section 7a; 8a; 9 a.
  • the dashed line F2 represents the path traveled by the withdrawn water as it flows along the edge-free, fine-rake surface of the third section 7d; 8 d; 9 d corresponds.

Abstract

L'invention concerne une grille fine (1) adaptée pouvant être intégrée dans une prise d'eau (2), laquelle prise d'eau (2) est placée dans un cours d'eau pour prélever de l'eau dans ce cours d'eau. La grille fine (1) comporte des barres (7 ; 8 ; 9 ; 10 ; 11) qui sont disposées transversalement à la direction longitudinale (A) de la grille fine (1) et parallèlement les unes aux autres de manière compacte de sorte que chaque paire de barres adjacentes (7 ; 8 ; 9 ; 10 ; 11) définissent entre elles une fente respective (12). Cette fente respective (12) comporte une ouverture d'entrée (12a) dont la largeur est inférieure à 2 mm. L'eau qui ne passe pas dans les fentes (12) s'écoule le long de la grille fine (1) et définit ainsi un sens d'écoulement (B). Au moins la partie de chaque barre (7 ; 8 ; 9 ; 10 ; 11), destinée à détourner l'eau prélevée et venant en contact avec l'eau prélevée, a une section transversale exempte d'angle. Une première partie (7a ; 8a ; 9a ; 10a ; 11a) du contour de cette section transversale exempte d'angle s'étend dans une direction qui comporte également une composante parallèle à la direction longitudinale (A) de la grille fine (1) et orientée dans le sens d'écoulement (B) de l'eau qui s'écoule.
PCT/IT2018/000072 2018-05-18 2018-05-18 Grille fine racing adaptée pour être intégrée dans une prise d'eau WO2019220469A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IT2018/000072 WO2019220469A1 (fr) 2018-05-18 2018-05-18 Grille fine racing adaptée pour être intégrée dans une prise d'eau

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT2018/000072 WO2019220469A1 (fr) 2018-05-18 2018-05-18 Grille fine racing adaptée pour être intégrée dans une prise d'eau

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WO2019220469A1 true WO2019220469A1 (fr) 2019-11-21

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3751056A1 (fr) * 2019-06-13 2020-12-16 Sea to Sky Energy Solutions Corp. Structure d'admission d'eau

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040099583A1 (en) * 2001-10-24 2004-05-27 Frey Frejborg Screen cylinder with performance boosting configuration
EP2251072A1 (fr) * 2008-02-19 2010-11-17 Hanex Co., Ltd. Séparateur et procédé de séparation
AT508727A2 (de) 2009-08-31 2011-03-15 Wild Metal Srl Wasserfassung
CH708046A2 (de) 2013-05-08 2014-11-14 Marcel Höhener Coanda Wasserfassung mit Halbrundprofilen.
CH708203A2 (de) 2013-06-14 2014-12-15 Marcel Höhener Coanda Wasserfassung mit Halbrundprofilen.
EP3023165A1 (fr) 2014-11-19 2016-05-25 Stocker Mechatronik GmbH Tamis à fentes

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040099583A1 (en) * 2001-10-24 2004-05-27 Frey Frejborg Screen cylinder with performance boosting configuration
EP2251072A1 (fr) * 2008-02-19 2010-11-17 Hanex Co., Ltd. Séparateur et procédé de séparation
AT508727A2 (de) 2009-08-31 2011-03-15 Wild Metal Srl Wasserfassung
CH708046A2 (de) 2013-05-08 2014-11-14 Marcel Höhener Coanda Wasserfassung mit Halbrundprofilen.
CH708203A2 (de) 2013-06-14 2014-12-15 Marcel Höhener Coanda Wasserfassung mit Halbrundprofilen.
EP3023165A1 (fr) 2014-11-19 2016-05-25 Stocker Mechatronik GmbH Tamis à fentes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3751056A1 (fr) * 2019-06-13 2020-12-16 Sea to Sky Energy Solutions Corp. Structure d'admission d'eau
US11066798B2 (en) 2019-06-13 2021-07-20 Sea To Sky Energy Solutions Corp. Water intake structure
EP3896228A1 (fr) * 2019-06-13 2021-10-20 Sea to Sky Energy Solutions Corp. Structure d'admission d'eau

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