EP0668110B1 - Vorrichtung zum Mitreissen einer Substanz in einem Wasserstrom - Google Patents

Vorrichtung zum Mitreissen einer Substanz in einem Wasserstrom Download PDF

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Publication number
EP0668110B1
EP0668110B1 EP95300899A EP95300899A EP0668110B1 EP 0668110 B1 EP0668110 B1 EP 0668110B1 EP 95300899 A EP95300899 A EP 95300899A EP 95300899 A EP95300899 A EP 95300899A EP 0668110 B1 EP0668110 B1 EP 0668110B1
Authority
EP
European Patent Office
Prior art keywords
base member
water
bore
bed
groove
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
EP95300899A
Other languages
English (en)
French (fr)
Other versions
EP0668110A1 (de
Inventor
Alan Charles Cessford
David Alan Cale
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.)
Monsanto Co
Original Assignee
Monsanto Co
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 Monsanto Co filed Critical Monsanto Co
Publication of EP0668110A1 publication Critical patent/EP0668110A1/de
Application granted granted Critical
Publication of EP0668110B1 publication Critical patent/EP0668110B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2402—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device
    • B05B7/244—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using carrying liquid for feeding, e.g. by suction, pressure or dissolution, a carried liquid from the container to the nozzle
    • B05B7/2448—Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising containers fixed to the discharge device using carrying liquid for feeding, e.g. by suction, pressure or dissolution, a carried liquid from the container to the nozzle the carried liquid and the main stream of carrying liquid being brought together after discharge

Definitions

  • This invention relates to a device for entraining a substance, e.g. plant food, in a flow of water.
  • GB-A-2 236 259 discloses a device comprising a cap adapted to be fitted to the open top of a container filled with soluble plant food.
  • the cap comprises a duct which includes a venturi section for drawing concentrated solution from the container. Upstream of the venturi section, the duct has a lateral orifice through which water flows into the container under the pressure prevailing in the duct.
  • the construction of the device is expensive and includes an anti-siphon device or non-return valve to prevent contaminants from being sucked back into the water supply if there is a reduction or reversal of the main water pressure.
  • US-A-2 926 857 discloses a device in accordance with the pre-characterising part of claim 1.
  • the device includes a valve in a passageway communicating with the upper surface of a base member (over which a stream of water flows), the underside of the base member, and a suction duct.
  • the present invention provides a device for entraining in a flow of water a substance contained in an open-topped container, the device comprising a cap adapted to be fitted to the open top of the container, the cap comprising a water inlet section having an inlet end which is connectable to a source of water under pressure and having a bore which communicates between the inlet end and an outlet end and which forms the water into a jet, and a base member and sidewalls delimiting an upwardly open cavity into which the bore discharges, the upper surface of the base member including a bed which slopes upwards in the downstream direction, the water jet impinging on the bed downstream of the outlet end of the core and flowing as a stream over the bed towards an exit of the cavity, the base member including a hollow depending portion defining a suction duct having an upper end across which the water stream flows to cause a reduction in pressure in the suction duct, and including means for communicating between the upper surface and the underside of the base member, the said communicating means being upstream of the suction duct and including an
  • This structure ensures an air break consisting of a space open to the air between the outlet end of the bore of the water inlet section and the location at which the water comes into contact with the substance, thereby preventing suck-back of contaminated water should there by a pressure drop or reversal in the bore.
  • the water diverted into the container can cause a continuous turbulent flow therein.
  • the inlet section, the base member, and the sidewalls can easily be made in one piece, e.g. by injection moulding.
  • the device illustrated in Figures 1 and 2 comprises a one-piece moulded plastics cap 1 with a mixing chamber 2 having an internally screw-threaded circumferential wall 3 which is screwed onto the externally screw-threaded neck 4 of a transparent container 6 filled with powdered plant food (not shown) which dissolves in water to form a solution (which term includes colloidal solutions and dispersions).
  • the cap 1 includes a water inlet section 7 having a bore 8 of circular cross-section which progressively decreases in diameter from an inlet end 8a to an outlet end 8b.
  • the inlet end of the inlet section 7 is constituted by a spigot 9, accommodating an O-ring 11 (Fig. 1), for connection to a conventional click-fitting connector (not shown) providing communication with the main water supply.
  • the water under mains pressure, accelerates along the gradually convergent bore 8 and leaves the outlet end 8b as a jet which enters an upwardly open divergent cavity 12 defined by a base member 13 and sidewalls 14.
  • the upper surface of the base member 13 includes a bed 16 on which the water jet impinges and forms a divergent stream flowing towards a convex ramp 17 rising towards a lip or ridge 18 at a downstream exit of the cavity 12.
  • the surface over which the water flows acts to direct the flow in such a way as to create an even fan-shaped spray with fine droplets, suitable for irrigation in a wide range of garden situations.
  • the lip 18 enhances the formation of fine droplets.
  • Two inward projections 19 at the exit ends of the sidewalls 14 act to produce a clearly defined ending to the spray pattern.
  • the bed 16 includes a recess comprising a groove 21 which is aligned with the bore 8.
  • the base 22 of the groove 21 is horizontal and is substantially level with the lowest point of the outlet end 8b of the bore 8.
  • the end of the groove 21 remote from the bore 8 is closed by a (preferably vertical) step 23 which is semi-circular in plan view.
  • the groove 21 is of constant width and is narrower than the outlet end 8b.
  • Adjacent the step 23, an orifice 24 communicates between the groove 21 and the mixing space 2. Part of the water flow becomes diverted through the orifice 24 into the container 6, causing a continuous turbulent flow in the powder, preventing the formation of an insoluble matrix, while the powder dissolves in the water to form a concentrated solution in the container 6.
  • the base member 13 includes a downwardly projecting tube 26 defining a duct 27 through which the concentrated solution is sucked from the container 6 owing to the venturi effect of the stream of water flowing over the upper end of the duct 27, which opens into the upstream end of a depression 28 in the bed 16.
  • the tube 26 depends below the top of the container 6, thereby preventing overflow.
  • the duct 27 is wider than the orifice 24 and the ratio of their diameters is selected empirically so as to achieve a desired dilution rate (weight of powder/volume of water) without overflow from the container 6.
  • the base member 13 Between the bed 16 and the inlet section 7 the base member 13 includes a trough 29 enhancing the air break between the duct 27 and the bore 8.
  • the trough has an optional drainage hole 31 (or holes).
  • FIG. 3 to 6 of the drawings illustrate a preferred embodiment of the above-described device. Equivalent parts are denoted by the same reference numerals, and therefore no further description is necessary. Preferred dimensions of the parts of the cap 1 are as follows.
  • Cap 1 overall length 191.5 mm; wall 3 : outer diameter 90 mm; bore 8 : length 100 mm, inlet diameter 8.8 mm, outlet diameter 3.5 mm; bed 16 : slope 8°; ramp 17 : radius 85.8 mm; lip 18 : height 0.57 mm, length 24.5 mm; groove 21 : width 2 mm; step 23 : height 1.5 mm; orifice 24 : upper end diameter 0.8 ⁇ 0.1 mm, downward divergence 4°, length 1.5 mm; duct 27 : upper end diameter 1.8 ⁇ 0.1 mm, downward divergence 6°, lower end 5 mm above lower edge of wall 3; depression 28 : depth 1.5 mm; trough 29 : length 5.5 mm, width 14.5 mm, depth 5 mm.
  • Figure 7 shows a modification of the inlet end of the inlet section 7 of the preferred embodiment, with a manually operable on/off valve 32 for selectably turning the water jet on and off.
  • the valve 32 may be a sliding gate valve (as shown) or a rotary gate valve or any other conventional type of on/off valve.
  • the valve 32 may be incorporated into the body of the inlet section 7, as shown, or may be provided as a fixed or removable attachment on the spigot 9.

Landscapes

  • Nozzles (AREA)
  • Paper (AREA)
  • Closures For Containers (AREA)
  • Catching Or Destruction (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
  • Cultivation Receptacles Or Flower-Pots, Or Pots For Seedlings (AREA)
  • Devices For Dispensing Beverages (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Claims (15)

  1. Vorrichtung zum Mitreißen einer Substanz in einem Wasserstrom, die in einem oben offenen Behälter enthalten ist, wobei die Vorrichtung einen Deckel (1) aufweist, der dazu eingerichtet ist, auf die offene Oberseite des Behälters passend aufgesetzt zu werden, der Deckel (1) einen Wassereinlaßabschnitt (7) aufweist, mit einem Einlaßende (8a), das mit einer unter Druck stehenden Wasserquelle in Verbindung bringbar ist, und mit einer Bohrung (8), die zwischen dem Einlaßende (8a) und einem Auslaßende (8b) eine Verbindung herstellt und das Wasser zu einem Strahl formt, sowie ein Basisteil (13) und Seitenwände (14), die eine nach oben offene Höhlung (12) begrenzen, in welche die Bohrung (8) einmündet, wobei die obere Oberfläche des Basisteils (13) ein Bett (16) aufweist, das in Strömungsrichtung nach oben geneigt ist, der Wasserstrahl auf das Bett (16) stromabwärts vom Auslaßende (8b) der Bohrung (8) auftrifft und als Strom über das Bett (16) zu einem Auslauf der Höhlung (12) strömt, und das Basisteil (13) einen hohlen, abwärtsstehenden Abschnitt (26) aufweist, der eine Saugleitung (27) bildet, die ein oberes Ende aufweist, über das der Wasserstrom quer hinwegfließt, um eine Druckverringerung in der Saugleitung (27) zu verursachen, und mit Mitteln für eine Verbindung der oberen Oberfläche und der Unterseite des Basisteils (13), wobei die genannten Verbindungsmittel stromaufwärts von der Saugleitung (27) angeordnet sind und eine Öffnung (24) aufweisen, die mit der Unterseite des Basisteils (13) in Verbindung steht, um im Gebrauch Wasser in den oben offenen Behälter abzuleiten, dadurch gekennzeichnet, daß die Verbindungsmittel eine Nut (21) im Bett (16) aufweisen, die auf die Bohrung (8) ausgerichtet ist, am Ende, das der Bohrung (8) zugewandt ist, offen ist und durch eine Stufe (23) am anderen Ende geschlossen ist, wobei die genannte Öffnung (24) mit der Nut (21) in Verbindung steht.
  2. Vorrichtung wie beansprucht in Anspruch 1, worin die Öffnung (24) dem anderen Ende der Nut (21) nähergelegen ist.
  3. Vorrichtung wie beansprucht in Anspruch 2, worin die Öffnung (24) der Stufe (23) benachbart ist.
  4. Vorrichtung wie beansprucht in jedem vorangehenden Anspruch, worin die Breite der Nut (21) an der Stelle der Öffnung (24) im wesentlichen der entsprechenden Querabmesssung der Öffnung (24) gleich ist.
  5. Vorrichtung wie beansprucht in jedem vorangehenden Anspruch, worin die Nut (21) schmäler ist als das Auslaßende (8b) der Bohrung (8).
  6. Vorrichtung wie beansprucht in jedem vorangehenden Anspruch, worin die Breite der Nut (21) längs ihrer Länge im wesentlichen konstant ist.
  7. Vorrichtung wie beansprucht in jedem vorangehenden Anspruch, worin das Basisteil (13) einen nach oben offenen Trog (29) zwischen dem Wassereinlaßabschnitt (7) und dem Bett (16) aufweist.
  8. Vorrichtung wie beansprucht in Anspruch 7, worin mindestens ein Drainageloch (31) eine Verbindung zwischen dem Trog (29) und der Unterseite des Basisteils (13) herstellt.
  9. Vorrichtung wie beansprucht in jedem vorangehenden Anspruch, worin die Bohrung (8) einen Durchmesser aufweist, der sich in Stromabwärtsrichtung verkleinert.
  10. Vorrichtung wie beansprucht in jedem vorangehenden Anspruch, worin sich das obere Ende der Saugleitung (27) in eine Vertiefung (28) im Bett (16) öffnet.
  11. Vorrichtung wie beansprucht in jedem vorangehenden Anspruch, worin der stromabwärts gelegene Endabschnitt der oberen Oberfläche des Basisteils (13) zwischen der Saugleitung (27) und dem Auslauf der Höhlung eine Rampe (17) aufweist, die konvex ist und zum Auslauf der Höhlung hin ansteigt.
  12. Vorrichtung wie beansprucht in jedem vorangehenden Anspruch, worin die Seitenwände (14) jeweils neben dem Auslauf der Höhlung einen einwärtsgerichteten Vorsprung (19) aufweisen.
  13. Vorrichtung wie beansprucht in jedem vorangehenden Anspruch, worin das Basisteil (13) eine nach oben vorstehende Lippe (18) neben dem Auslauf der Höhlung aufweist.
  14. Vorrichtung wie beansprucht in jedem vorangehenden Anspruch, worin der Einlaßabschnitt (7), das Basisteil (13) und die Seitenwände (14) von einem einzigen, integrierten, abgeformten Körper aus Kunststoff gebildet sind.
  15. Vorrichtung wie beansprucht in jedem vorangehenden Anspruch, worin der Einlaßabschnitt (7) mit einem Ventil (32) versehen ist, um wahlweise den Wasserstrahl an- und auszudrehen.
EP95300899A 1994-02-22 1995-02-14 Vorrichtung zum Mitreissen einer Substanz in einem Wasserstrom Expired - Lifetime EP0668110B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9403359A GB2286778B (en) 1994-02-22 1994-02-22 Device for entraining a substance in a water flow
GB9403359 1994-02-22

Publications (2)

Publication Number Publication Date
EP0668110A1 EP0668110A1 (de) 1995-08-23
EP0668110B1 true EP0668110B1 (de) 1998-09-30

Family

ID=10750733

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95300899A Expired - Lifetime EP0668110B1 (de) 1994-02-22 1995-02-14 Vorrichtung zum Mitreissen einer Substanz in einem Wasserstrom

Country Status (9)

Country Link
EP (1) EP0668110B1 (de)
AT (1) ATE171653T1 (de)
AU (1) AU673289B2 (de)
CA (1) CA2143080A1 (de)
DE (1) DE69505025T2 (de)
DK (1) DK0668110T3 (de)
GB (1) GB2286778B (de)
NZ (1) NZ264781A (de)
ZA (1) ZA951402B (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108792218B (zh) * 2018-06-29 2019-08-27 重庆市纭凡食品开发有限责任公司 预包装食品储存装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2061932A (en) * 1934-12-15 1936-11-24 Insect O Products Company Means and method for mixing liquids
GB513147A (en) * 1937-10-02 1939-10-04 Pyrene Co Ltd Improvements relating to the introduction of foam-stabilising solutions into water streams
US2744791A (en) * 1953-06-29 1956-05-08 Gilbert G Budwig Aspirator
US2753213A (en) * 1953-11-25 1956-07-03 William V Offutt Liquid mixing and spraying apparatus
US2926857A (en) * 1954-01-08 1960-03-01 Clifford H Snyder Injector ejector liquid spray apparatus
GB800279A (en) * 1955-10-18 1958-08-20 Hugh Noel Mcnair Liquid proportioning device
GB8324976D0 (en) * 1983-09-19 1983-10-19 Phostrogen Ltd Spraying device
US5100059A (en) * 1991-03-18 1992-03-31 Hayes Products Single valve aspiration type sprayer

Also Published As

Publication number Publication date
GB2286778B (en) 1997-12-10
DE69505025T2 (de) 1999-05-12
GB9403359D0 (en) 1994-04-13
AU7599594A (en) 1995-08-31
ATE171653T1 (de) 1998-10-15
ZA951402B (en) 1996-01-10
NZ264781A (en) 1996-01-26
AU673289B2 (en) 1996-10-31
DK0668110T3 (da) 1999-06-21
GB2286778A (en) 1995-08-30
CA2143080A1 (en) 1995-08-23
DE69505025D1 (de) 1998-11-05
EP0668110A1 (de) 1995-08-23

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