EP0664846A1 - Dispositif d'evacuation - Google Patents

Dispositif d'evacuation

Info

Publication number
EP0664846A1
EP0664846A1 EP94908838A EP94908838A EP0664846A1 EP 0664846 A1 EP0664846 A1 EP 0664846A1 EP 94908838 A EP94908838 A EP 94908838A EP 94908838 A EP94908838 A EP 94908838A EP 0664846 A1 EP0664846 A1 EP 0664846A1
Authority
EP
European Patent Office
Prior art keywords
liquid
vortex
vessel
vortex chamber
outlet
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Withdrawn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
EP94908838A
Other languages
German (de)
English (en)
Inventor
Roger Julian Cook
Garry William Fagan
Harry Matthew Pelaez
Stephen P. Hides
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.)
Hydro International Ltd
Original Assignee
Hydro International Ltd
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 Hydro International Ltd filed Critical Hydro International Ltd
Publication of EP0664846A1 publication Critical patent/EP0664846A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
    • E03F5/105—Accessories, e.g. flow regulators or cleaning devices
    • E03F5/106—Passive flow control devices, i.e. not moving during flow regulation

Definitions

  • This invention relates to a discharge device for discharging liquid from a reservoir under a substantially constant pressure head. More particularly, the present invention relates to a discharge device comprising a vortex valve flow control supported in a body of liquid a fixed distance below the liquid surface.
  • a vortex valve is a device for controlling fluid flow by a hydraulic effect without requiring moving parts.
  • Such devices have a vortex chamber provided with an outlet at one axial end and an inlet arranged to cause swirl in the chamber when a certain critical flow has been attained.
  • the inlet communicates with a body of water which exerts a pressure head on the liquid entering the vortex chamber.
  • US Patent No. 4206783 discloses a vortex valve having a conical vortex chamber with a tangential inlet and an outlet
  • SUBSTITUTE SHEET disposed at the narrower end of the chamber.
  • short vortex valves of which the cross- sectional configuration of the vortex chamber is a logarithmic spiral extending the full length of its longitudinal axis to the outlet.
  • water entering through the inlet of a vortex valve passes through the vortex chamber to the outlet with substantially no pressure drop and the valve can be considered to be open.
  • water enters through the inlet with enough energy to create a vortex in the vortex chamber which results in a considerable pressure drop between the inlet and the outlet and may greatly restrict flow through the outlet, or even substantially cut it off altogether.
  • the valve serves to limit the rate of flow through it automatically.
  • Vortex valves can be used, for example, to control the flow of storm water in sewers, to ensure that equipment downstream of the valve is not overloaded during periods of heavy rainfall.
  • a liquid discharge device comprising a vortex valve flow control and a support means adapted to support the vortex valve flow control at a fixed distance below a liquid surface.
  • liquid discharge apparatus comprising a body of liquid of variable depth and a vortex valve having a liquid outlet, the said vortex valve being supported in the body of liquid at a fixed distance below the surface of the liquid and the said liquid outlet discharging to a position located outside the said body of liquid.
  • the vortex valve may comprise a housing defining a vortex chamber, the housing having an inlet through which liquid may enter the vortex chamber in a manner to promote swirl within the vortex chamber and an
  • the vortex valve may be, for instance, one having a conical vortex chamber, or it may be one in which the cross-sectional configuration of the vortex chamber is a logarithmic spiral.
  • the inlet is preferably tangential to the vortex chamber.
  • the vortex valve may be supported in the body of liquid by a float to which the vortex valve is rigidly connected by, for instance, a rigid member. Alternatively, the vortex valve and the float can be formed integrally or secured directly to each other.
  • the vortex valve may be arranged so that the axis of the outlet is vertical, and the device therefore discharges downwardly.
  • a further inlet to the vortex cnamDer preferably at an axial position in the end wall opposite the end wall in which the discharge outlet is situated, which communicates with a source of gas, for example air, to admit the said gas into the vortex chamber and facilitate the establishment of the vortex in the vortex chamber.
  • the further inlet may communicate through a communication means such as a pipe to a point in the atmosphere outside the body of liquid.
  • the communication means may for instance be the rigid member connecting the vortex valve and the float, suitably modified to have a hollow bore which opens directly into the vortex chamber at one end and being provided with a continuation at the other end which passes through or around the float to a point above the liquid surface to permit air to be admitted to the vortex chamber.
  • the said further inlet may communicate by a flexible hose with the necessary
  • SUBSTIT TE SHEET source of gas for example the atmosphere.
  • the outlet may be provided with a spigot to which a flexible conduit or hose may be connected to discharge liquid from the device to a location outside the body of liquid.
  • a flexible conduit or hose may be connected to discharge liquid from the device to a location outside the body of liquid.
  • the flexible hose may pass through an opening in a wall of the body of liquid.
  • the vortex valve flow control is preferably oriented so that the intake is horizontal.
  • a valve may be provided outside the chamber in the flow line from the vortex valve to isolate the system for maintenance.
  • the apparatus of the invention may be used widely in the waste water treatment industry, particularly at sewage treatment works, for regulating flows to treatment processes. Equally it may be used in any type of process industry where a need exists to balance or regulate flows in any manner. It will be a superior performance, low cost installation, accurate to within known tolerances, largely obviating maintenance requirements, requiring no energy input or manual attendance other than to open or close the isolating valve, if present. There may additionally be applications for regulating discharges of trade waste to sewers and drains.
  • the reservoir containing the body of liquid in which the discharge device of the present invention is situated may be a separator of the type described in British Patent No. 2082941 which discloses a separator which is particularly suitable for separating, for example, sewage and other solid matter from water in storm water overflows.
  • the separator is in the form of a cylindrical vessel having an inlet which is disposed tangentially so as to promote a circulating flow within the vessel. This circulating flow comprises an outer,
  • SUBSTITUTE SHEET relatively fast, flow and an inner, relatively slow, flow.
  • the shear zone between these two regions is stabilised by an annular dip plate which projects downwardly from the top of the vessel.
  • a flow modifying member is provided in the vessel to enhance the removal of solid particles accumulating at the bottom of the vessel to a central outlet. Clean water is removed from the top of the vessel.
  • a floatables trap is provided directly above the inlet and opposite the outlet in order to reduce the possibility of floatable solids being discharged through the clean water outlet. It is specifically stated that the trap should be disposed anywhere around the circumference of the vortex chamber.
  • a low energy separator for separating solid components out of a liquid mixture, comprising (a) a vessel having a cylindrical outer wall and a base at one end, (b) a body which is provided within the vessel and which defines with the base an annular opening spaced from the outer wall, (c) an inlet for introducing the liquid mixture into the
  • SUBSTITUTE SHEET vessel (d) an outlet in the upper region of the vessel for removing from the vessel liquid from which solid components have been separated, (e) a primary annular dip plate in an upper region of the vessel and spaced from the outer wall of the vessel and ( f) means for promoting a rotational movement of liquid and suspended solids within the vessel, said rotational movement being sufficient to cause or enhance an inward sweeping effect towards the annular opening on solids accumulated at the base of the vessel, whilst being of sufficiently low energy that separation of the solids components of the liquid in the vessel is brought about primarily by gravity; wherein the separator also includes a discharge device in accordance with the first aspect of this invention, supported by the support means a fixed distance below the surface of the liquid in the vessel and the said liquid outlet of the vortex valve discharging to a position outside the vessel.
  • a generally circular baffle which overlaps, in the vertical direction, the floatables trap in order to prevent floatable material floating directly upwards out of the annular aperture to the outlet by-passing the trap.
  • the means for promoting a rotational movement of liquid and suspended solids within the vessel may be the inlet to the vessel by which the liquid mixture is introduced into the vessel.
  • the inlet is preferably tangential and the energy of the liquid mixture being introduced into the vessel is sufficient to initiate and sustain the rotational movement in the vessel.
  • a further inlet may be provided by which an energizing liquid is introduced into the vessel to promote swirl (see our British Patent No. 2158741).
  • FIG. 1 illustrates a liquid delivery arrangement in accordance with the present invention
  • Figure 2 illustrates a perspective view of part of the apparatus shown in Figure 1;
  • Figure 3 illustrates an alternative arrangement of part of perspective view of part of a liquid delivery arrangement in accordance with the present invention.
  • Figure 4 is a diagrammatic, vertical section through a separator incorporating a discharge device in accordance with the present invention
  • Figure 5 is a plan view of the separator shown in Figure 1.
  • a liquid delivery apparatus 1 having an outer wall 3 and a base 4 comprising a reservoir 2 containing a body of liquid 5 having a surface 5a and a discharge device in the form of a vortex valve flow control having a cross-section which, in the embodiment shown is a logarithmic spiral.
  • the vortex valve 6 comprises a housing 7 defining a vortex chamber 7.
  • the housing 7 has an inlet opening 9 and an axial outlet 10 in end wall 20.
  • the outlet 10 is provided with a spigot 11 which projects downwardly from the vortex valve 6.
  • the vortex valve 6 is supported a fixed distance below the surface 5a of the body of liquid 5 by means of a float 15 to which the vortex valve 6 is attached by a rigid connecting member 16.
  • the vortex valve is supported a distance "H" below the surface of the liquid. This distance can be variable by using a connecting member 16 whose length can be varied.
  • the outlet spigot 11 is connected to a flexible hose which passes through the wall 3 of the reservoir 2 near the base 4. There is provided an isolating valve 18 to isolate the apparatus 1 for maintenance.
  • a further axial inlet 21 is provided in the other end wall 22 to admit air into the vortex chamber 8.
  • This further inlet 21 communicates with a position outside the body of liquid via the connecting member 16 which has a hollow core 23 which extends through the float 15 and opens to the atmosphere.
  • the level of liquid in the reservoir can alter; however, as the level alters, the distance H will always remain constant, by virtue of the float 15 and rigid connecting member 16. This means that a constant head of liquid is exerted on the inlet opening 9 of the vortex valve and this ensures a constant discharge rate from the outlet 10 of the vortex valve 6.
  • the flexible hose 17 which is connected to the vortex valve 6 will move also and therefore there should be enough slack in the hose 17 to ensure that the float 15 and vortex valve 6 can move freely.
  • FIG 3 shows an alternative embodiment in which the vortex valve 6 is joined directly to the float 15.
  • the float has a passageway 30 in it corresponding to the hollow core of the connecting member 16 shown in the embodiment illustrated in Figures 1 and 2.
  • the separator depicted in Figures 4 and 5 comprises a vessel 101 having a cylindrical outer wall 102 and a sloping, conical base 103.
  • the other end 104 of the vessel 101, opposite the base 103, is open, although it is to be appreciated that the separator may be closed by a lid.
  • a flow modifying member 105 in the shape of a cone which defines with the base 103 an annular opening 106 which is spaced from the outer wall 102 of the vessel.
  • the lower peripheral edge of the flow modifying member 105 terminates approximately half way between the central axis of the separator and the outer wall 102 thereof.
  • a tangential inlet 107 to the vessel 101, through the outer wall 102, is provided by which a liquid containing solid components may be introduced into the vessel 101.
  • the dip plate has an annular lower edge 109a.
  • the dip plate 109 is supported by horizontal beams.
  • Communicating with the annular opening 106 in the base 103 of the vessel 101 is an outlet pipe 111 by which solids accumulated at the base 103 may be removed.
  • a circular baffle 117 is supported from the beams 150 in an upper region of the vessel 101.
  • a discharge device 200 in the form of a vortex valve as described in more detail above (see Figures 1 and 2) .
  • the vortex valve 200 is support slightly below the surface of the liquid in the vessel; as the level varies, flow containing floatable material passes through the inlet 209 to the outlet of the valve 200 and from there to a flexible pipe 217 and away from the vessel where it may be combined with the
  • the discharge device in the form of a vortex valve 200 is free to rise and fall within a vertical plane in the zone 110 outside the dip plate 109 and inward of the outer wall 102.
  • the vortex valve 200 intercepts flow immediately below the surface of liquid, particularly floating material, independent of the absolute level of liquid in the vessel 101 and discharges it through pipeline 217.
  • the separator may be a separator in accordance with our British Patent No. 2158741 in which there is provided a further inlet by which an energising fluid may be introduced into the vessel in a manner to cause or enhance rotational movement of the liquid in the
  • the vessel shown in Figure 4 has a base region which is in accordance with our British Patent Publication No. 2189413.
  • the base region of the separator may be as shown in the drawings of our British Patent Publication No. 2082941.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Cyclones (AREA)

Abstract

L'invention concerne un dispositif d'évacuation de liquide comprenant un élément de commande d'écoulement à vanne tourbillonnaire (6), ainsi qu'un moyen de support (15) conçu pour supporter ledit élément (6) à une distance fixe au-dessous d'une surface de liquide (5a). L'invention concerne également un appareil d'évacuation de liquide (1) comprenant une masse de liquide (5) à profondeur variable et un élément de commande d'écoulement à vanne tourbillonnaire (6), ladite vanne (6) étant supportée dans la masse de liquide (5) à une distance fixe au-dessous de la surface du liquide (5a) et la sortie de liquide (10) de l'élément de commande d'écoulement à vanne tourbillonnaire (6) effectuant l'évacuation à une position située à l'extérieur de ladite masse de liquide (5).
EP94908838A 1992-08-27 1993-08-26 Dispositif d'evacuation Withdrawn EP0664846A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9218214A GB2270009A (en) 1992-08-27 1992-08-27 Liquid discharge device
GB9218214 1992-08-27
PCT/GB1993/001825 WO1994005867A1 (fr) 1992-08-27 1993-08-26 Dispositif d'evacuation

Publications (1)

Publication Number Publication Date
EP0664846A1 true EP0664846A1 (fr) 1995-08-02

Family

ID=10721032

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94908838A Withdrawn EP0664846A1 (fr) 1992-08-27 1993-08-26 Dispositif d'evacuation

Country Status (5)

Country Link
EP (1) EP0664846A1 (fr)
AU (1) AU4971193A (fr)
CA (1) CA2143284A1 (fr)
GB (1) GB2270009A (fr)
WO (1) WO1994005867A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2333165B (en) * 1997-10-04 1999-12-01 David Arthur Collier Liquid draining apparatus
GB2334791B (en) 1998-02-27 2002-07-17 Hydro Int Plc Vortex valves
NO306248B1 (no) * 1998-06-29 1999-10-11 Norske Stats Oljeselskap Röranordning for væskeutlöp fra en beholder, særlig en separasjonstank
US8757667B2 (en) 2010-07-16 2014-06-24 Ipex Technologies Inc. Adapters and connector assemblies for flow managing apparatuses
CA2714675C (fr) 2010-07-16 2017-05-09 Ipex Technologies Inc. Ensembles de connecteurs pour dispositifs limiteurs de debit

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB409935A (en) * 1932-07-18 1934-05-10 Olier Sa Ets A Improvements in devices for the withdrawal of liquid extracts
DE2027479A1 (de) * 1970-06-04 1971-12-09 Verstegen, Willi, 7014 Kornwestheim Verfahren zur mechanischen Oberflächenreinigung von Flüssigkeiten
US3753496A (en) * 1971-12-20 1973-08-21 E Boyd Converging vortex apparatus for separating oil from water
FR2185201A5 (fr) * 1972-05-19 1973-12-28 Aquitaine Petrole
DE2643029C3 (de) * 1976-09-24 1980-10-23 Hansjoerg Dr. 7000 Stuttgart Brombach Abwasserdrossel
US4626358A (en) * 1984-10-18 1986-12-02 Fetsko Francis E Liquid sweeping assembly and method
DE3601094A1 (de) * 1986-01-16 1987-07-23 Willi Dipl Ing Hoerdemann Vorrichtung zum abziehen einer konstanten wassermenge aus einem becken
US4797063A (en) * 1987-05-27 1989-01-10 Chem-O Company, Inc. Floating suction apparatus
GB2249642B (en) * 1990-10-29 1994-09-14 Hydro Int Ltd Vortex valves
US5106494A (en) * 1991-02-08 1992-04-21 Jmo Holding, Inc. Decanter assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9405867A1 *

Also Published As

Publication number Publication date
WO1994005867A1 (fr) 1994-03-17
GB2270009A (en) 1994-03-02
GB9218214D0 (en) 1992-10-14
AU4971193A (en) 1994-03-29
CA2143284A1 (fr) 1994-03-17

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