EP0810035A2 - Rotary Nozzle spray device - Google Patents

Rotary Nozzle spray device Download PDF

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Publication number
EP0810035A2
EP0810035A2 EP97201477A EP97201477A EP0810035A2 EP 0810035 A2 EP0810035 A2 EP 0810035A2 EP 97201477 A EP97201477 A EP 97201477A EP 97201477 A EP97201477 A EP 97201477A EP 0810035 A2 EP0810035 A2 EP 0810035A2
Authority
EP
European Patent Office
Prior art keywords
nozzle
liquid
exit
conduit
cap
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Withdrawn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
EP97201477A
Other languages
German (de)
French (fr)
Other versions
EP0810035A3 (en
Inventor
Ivan Amadei
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.)
Annovi Reverberi SpA
Original Assignee
Annovi Reverberi SpA
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 Annovi Reverberi SpA filed Critical Annovi Reverberi SpA
Publication of EP0810035A2 publication Critical patent/EP0810035A2/en
Publication of EP0810035A3 publication Critical patent/EP0810035A3/en
Withdrawn legal-status Critical Current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
    • B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/04—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet
    • B05B3/0409—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet with moving, e.g. rotating, outlet elements
    • B05B3/0463—Rotor nozzles, i.e. nozzles consisting of an element having an upstream part rotated by the liquid flow, and a downstream part connected to the apparatus by a universal joint

Definitions

  • This invention relates to a rotary nozzle spray device, ie a device arranged to emit a water jet the axis of which is inclined and moves about a main axis to describe a cone of revolution.
  • the invention is used in particular for high-pressure water jets.
  • the object of the present invention is to provide a device with a rotary nozzle, which is effective, reliable and of relatively low cost.
  • the device according to the invention is of the type comprising an inner chamber having a liquid exit and a surface of revolution positioned upstream of the exit. There is also provided a first nozzle positioned within the inner chamber and traversed by an axial conduit for liquid passage, and having a front portion positioned in correspondence with the exit, and a rear portion with an outer surface of circular extension having a diameter less than the diameter of the surface of revolution of the inner chamber and arranged to roll on this surface.
  • the solutional idea on which the present invention is based consists of a cap of circular section coaxial with the nozzle conduit and communicating with it, its concavity facing upstream, to define the rear portion of the nozzle; a second nozzle is also provided, positioned upstream of the first nozzle and arranged to rotate about the device axis to emit a liquid jet directed against the inner surface of the cap in a direction having at least one component radial to this surface.
  • said second nozzle is associated with means for rotating it by the energy possessed by the liquid.
  • the exit conduit of the second nozzle is positioned within the cap concavity and has its axis directed substantially perpendicular to the axis of the first nozzle.
  • Figure 1 is a section through the spray device taken on a generic axial plane.
  • Figure 2 is a section on the plane II-II of Figure 1.
  • Figure 3 is a section on the plane III-III of Figure 1.
  • Figure 4 is a section on the plane IV-IV of Figure 1.
  • the device of the invention comprises an outer casing 5 roughly of bell shape, having within its front portion a substantially conical inner chamber 10 which in its front end comprises a liquid exit aperture 11.
  • the chamber 10 In the portion downstream (ie to the rear) of the aperture 11, the chamber 10 has a surface of revolution 12, specifically of frustoconical shape.
  • the casing 5 and the chamber 10 have a main axis A, which in Figure 1 is positioned vertically.
  • a first nozzle 20 having a liquid passage conduit 21 positioned along the nozzle axis B.
  • the nozzle 20 has a front portion 2 positioned against the aperture 11 to close it.
  • the front portion 22 has a substantially hemispherical outer surface which rests, with contact along a circular line, against a conical seat 13 provided immediately upstream of the aperture 11. The portion 22 internally closes the aperture 11.
  • the rear portion of the nozzle 20 is in the shape of a cap 23 of circular section coaxial with the aperture 11, and having its concavity facing upstream.
  • the cap 23 has a circular outer surface 23' of diameter less than the diameter of the surface 12 of the chamber 10, and is arranged to roll (or slide) on said surface 12.
  • the axis B of the nozzle 20 When resting against the surface 12, the axis B of the nozzle 20 forms an angle with the axis A and intersects this latter at a point close to the seat 13.
  • the device comprises a second nozzle 30 positioned upstream of the first nozzle 20 and having a rear portion 31 (positioned downstream) coaxial with the axis A of the casing 5, and connected to this latter in such a manner as to be able to rotate about the axis A.
  • the portion 31 has a cylindrical outer surface of circular section inserted as an exact fit into an axial hole 52, which acts as a bearing and is provided at the centre of a cylindrical body 51 rigid with the outer casing 5.
  • a radial impeller 32 provided with blades 32' and ribs 32'' in the manner of turbine blades of centripetal action, and operating within a closed chamber 16 formed within the casing 5.
  • an axial conduit 14 from which there radially extends a duct 15 which opens into the chamber 16 via inlet ports 15' positioned at the chamber periphery and providing a tangential component.
  • the rear portion 31 of the nozzle 30 possesses an axial conduit 33, the lower end of which communicates with the centre of the chamber 16, where the liquid leaves the chamber.
  • the front portion 34 of the nozzle 30 is inclined to the rear portion 31 and is positioned within the concavity of the cap 23.
  • an exit conduit 35 arranged to provide a jet directed against the inner surface of the cap 23 in a direction having at least one radial component, and in particular (better still) substantially radial.
  • the conduit 35 forms an angle with the axis A (along which the conduit 33 extends) such as to be substantially perpendicular to the axis B.
  • the liquid enters the device through the conduit 14 and then, via the duct 15, arrives with considerable dynamic energy within the chamber 16 where, by striking the blades of the impeller 32, it rotates the nozzle 30.
  • the liquid then leaves the chamber 16 through the conduit 33 and is then expelled, in the form of a jet, through the conduit 35 directed against the inner surface 23'' of the cap 23.
  • the liquid then fills the chamber 10 and leaves therefrom through the conduit 21 of the nozzle 20 to form a final jet having the final characteristics (velocity, diameter etc.) required of the jet leaving the spray device.
  • Said final jet leaves the device in the direction of the axis B.
  • the jet leaving the nozzle 30 urges the cap 23 to roll along the surface 12 of the chamber 10 in such a manner as to move that point of the cap 23 struck by the jet as far as possible from the axis A, and hence into contact with the surface 12.
  • the jet direction rotates in a constant direction (indicated by D in Figure 2), that point struck by the jet also moves in the same direction, and consequently that point on the cap 23 which is urged towards the surface 12 varies continuously.
  • the cap 23 is urged to roll along the surface 12 in such a manner as to "follow" the point struck by the jet.
  • the axis B and hence the final liquid jet leaving the device, moves along a conic surface determined by the fact that the rear portion 23 of the nozzle 20 rolls along the surface 12 (in the direction of the arrow E of Figure 2), while the front portion 22 slides on the seat 13 while maintaining the front final end of the conduit 21 substantially at rest.
  • This conic surface has its vertex within the exit aperture 11.
  • hydrodynamic action means can be associated with the nozzle 30 to brake the nozzle rotation, in order to prevent the rotation velocity becoming excessive.
  • said means comprise, positioned within the chamber 10, a series of radial blades 36 rigid with the rear portion 31 and moving to graze a corresponding series of fixed radial blades 37 provided on the casing 5 in the lower part of the inner chamber 10. Said blades act as a brake which opposes the rotation of the nozzle 30.

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  • Nozzles (AREA)
  • Catching Or Destruction (AREA)

Abstract

The device comprises an inner chamber (10) having a liquid exit (11), with a nozzle (20) positioned in the chamber (10) and traversed, for liquid passage, by an axial conduit (21) having a front portion (22) positioned in correspondence with and closing the exit, and a rear portion (23) arranged to roll on the surface (12) of the chamber (10). To the nozzle (20) there is joined a cap (23) of circular section, coaxial with the conduit (21) and communicating with it, its concavity facing upstream, to define the rear portion of the nozzle (20); a second nozzle (30) is positioned upstream of the first nozzle (20) and is arranged to rotate about the device axis (A) to emit a liquid jet directed against the inner surface of the cap (23) in a direction having at least one component radial to this surface; the second nozzle (30) is associated with means (32) for rotating it by the energy possessed by the liquid.

Description

  • This invention relates to a rotary nozzle spray device, ie a device arranged to emit a water jet the axis of which is inclined and moves about a main axis to describe a cone of revolution. The invention is used in particular for high-pressure water jets.
  • To clean various surfaces (vehicles, floors etc.) it is known to use water jets at high pressure (some tens of atmospheres). For better effectiveness of the jet dynamic action, relatively small-diameter jets are used. At the same time, to increase the area struck by the jet, the spray device is made to rotate about a main axis, to which it is inclined.
  • The object of the present invention is to provide a device with a rotary nozzle, which is effective, reliable and of relatively low cost.
  • The device according to the invention is of the type comprising an inner chamber having a liquid exit and a surface of revolution positioned upstream of the exit. There is also provided a first nozzle positioned within the inner chamber and traversed by an axial conduit for liquid passage, and having a front portion positioned in correspondence with the exit, and a rear portion with an outer surface of circular extension having a diameter less than the diameter of the surface of revolution of the inner chamber and arranged to roll on this surface.
  • The solutional idea on which the present invention is based consists of a cap of circular section coaxial with the nozzle conduit and communicating with it, its concavity facing upstream, to define the rear portion of the nozzle; a second nozzle is also provided, positioned upstream of the first nozzle and arranged to rotate about the device axis to emit a liquid jet directed against the inner surface of the cap in a direction having at least one component radial to this surface. In addition, said second nozzle is associated with means for rotating it by the energy possessed by the liquid.
  • The exit conduit of the second nozzle is positioned within the cap concavity and has its axis directed substantially perpendicular to the axis of the first nozzle.
  • The invention is described in detail hereinafter with the aid of the accompanying figures, which illustrate a non-limiting embodiment thereof.
  • Figure 1 is a section through the spray device taken on a generic axial plane.
  • Figure 2 is a section on the plane II-II of Figure 1.
  • Figure 3 is a section on the plane III-III of Figure 1.
  • Figure 4 is a section on the plane IV-IV of Figure 1.
  • The device of the invention comprises an outer casing 5 roughly of bell shape, having within its front portion a substantially conical inner chamber 10 which in its front end comprises a liquid exit aperture 11.
  • In the portion downstream (ie to the rear) of the aperture 11, the chamber 10 has a surface of revolution 12, specifically of frustoconical shape. The casing 5 and the chamber 10 have a main axis A, which in Figure 1 is positioned vertically.
  • Within the chamber 10 there is positioned a first nozzle 20 having a liquid passage conduit 21 positioned along the nozzle axis B. The nozzle 20 has a front portion 2 positioned against the aperture 11 to close it. Specifically, the front portion 22 has a substantially hemispherical outer surface which rests, with contact along a circular line, against a conical seat 13 provided immediately upstream of the aperture 11. The portion 22 internally closes the aperture 11.
  • The rear portion of the nozzle 20 is in the shape of a cap 23 of circular section coaxial with the aperture 11, and having its concavity facing upstream. The cap 23 has a circular outer surface 23' of diameter less than the diameter of the surface 12 of the chamber 10, and is arranged to roll (or slide) on said surface 12.
  • When resting against the surface 12, the axis B of the nozzle 20 forms an angle with the axis A and intersects this latter at a point close to the seat 13.
  • The device comprises a second nozzle 30 positioned upstream of the first nozzle 20 and having a rear portion 31 (positioned downstream) coaxial with the axis A of the casing 5, and connected to this latter in such a manner as to be able to rotate about the axis A.
  • Specifically, the portion 31 has a cylindrical outer surface of circular section inserted as an exact fit into an axial hole 52, which acts as a bearing and is provided at the centre of a cylindrical body 51 rigid with the outer casing 5.
  • To the portion 31 there is fixed a radial impeller 32, provided with blades 32' and ribs 32'' in the manner of turbine blades of centripetal action, and operating within a closed chamber 16 formed within the casing 5.
  • In the rear portion 54 of the casing 5 there is provided, for liquid entry into the device of the invention, an axial conduit 14 from which there radially extends a duct 15 which opens into the chamber 16 via inlet ports 15' positioned at the chamber periphery and providing a tangential component.
  • The rear portion 31 of the nozzle 30 possesses an axial conduit 33, the lower end of which communicates with the centre of the chamber 16, where the liquid leaves the chamber.
  • The front portion 34 of the nozzle 30 is inclined to the rear portion 31 and is positioned within the concavity of the cap 23.
  • In the portion 34 there is provided an exit conduit 35 arranged to provide a jet directed against the inner surface of the cap 23 in a direction having at least one radial component, and in particular (better still) substantially radial.
  • The conduit 35 forms an angle with the axis A (along which the conduit 33 extends) such as to be substantially perpendicular to the axis B.
  • In operation, the liquid enters the device through the conduit 14 and then, via the duct 15, arrives with considerable dynamic energy within the chamber 16 where, by striking the blades of the impeller 32, it rotates the nozzle 30.
  • The liquid then leaves the chamber 16 through the conduit 33 and is then expelled, in the form of a jet, through the conduit 35 directed against the inner surface 23'' of the cap 23.
  • The liquid then fills the chamber 10 and leaves therefrom through the conduit 21 of the nozzle 20 to form a final jet having the final characteristics (velocity, diameter etc.) required of the jet leaving the spray device.
  • Said final jet leaves the device in the direction of the axis B.
  • By striking the inner surface 23'' with relatively high dynamic energy, the jet leaving the nozzle 30 urges the cap 23 to roll along the surface 12 of the chamber 10 in such a manner as to move that point of the cap 23 struck by the jet as far as possible from the axis A, and hence into contact with the surface 12. Now as the jet direction rotates in a constant direction (indicated by D in Figure 2), that point struck by the jet also moves in the same direction, and consequently that point on the cap 23 which is urged towards the surface 12 varies continuously. In brief, the cap 23 is urged to roll along the surface 12 in such a manner as to "follow" the point struck by the jet.
  • The result is that the axis B, and hence the final liquid jet leaving the device, moves along a conic surface determined by the fact that the rear portion 23 of the nozzle 20 rolls along the surface 12 (in the direction of the arrow E of Figure 2), while the front portion 22 slides on the seat 13 while maintaining the front final end of the conduit 21 substantially at rest. This conic surface has its vertex within the exit aperture 11.
  • Advantageously, hydrodynamic action means can be associated with the nozzle 30 to brake the nozzle rotation, in order to prevent the rotation velocity becoming excessive.
  • In particular, said means comprise, positioned within the chamber 10, a series of radial blades 36 rigid with the rear portion 31 and moving to graze a corresponding series of fixed radial blades 37 provided on the casing 5 in the lower part of the inner chamber 10. Said blades act as a brake which opposes the rotation of the nozzle 30.
  • Numerous modifications of a practical and applicational nature can be made to the device of the invention, but without leaving the scope of the inventive idea as hereinafter claimed.

Claims (4)

  1. A rotary nozzle spray device, comprising:
    - an inner chamber (10) having a liquid exit (11), and a surface of revolution (12) positioned upstream of the exit (11),
    - and a first nozzle (20) positioned in the chamber (10) and traversed, for liquid passage, by an axial conduit (21) having a front portion (22) positioned in correspondence with and closing the exit, and a rear portion (23) having an outer surface (23') of circular extension with a diameter less than the diameter of the surface of revolution (12) of the inner chamber (10) and arranged to roll on this surface (12),
    characterised by comprising:
    - a cap (23) of circular section, coaxial with the conduit (21) of the nozzle (20) and communicating with it, its concavity facing upstream, to define the rear portion of the nozzle (20),
    - a second nozzle (30), positioned upstream of the first nozzle (20) and arranged to rotate about the device axis (A) to emit a liquid jet directed against the inner surface of the cap (23) in a direction having at least one component radial to this surface,
    - said second nozzle (30) being associated with means (32) for rotating it by the energy possessed by the liquid.
  2. A spray device as claimed in claim 1, characterised in that the exit conduit (35) of the second nozzle (30) is positioned within the concavity of the cap (23) and has its axis directed substantially perpendicular to the axis (B) of the first nozzle (20).
  3. A spray device as claimed in claim 1, characterised in that to the second nozzle (30) there is joined a bladed impeller (32) which receives the liquid from its periphery and on its exit conveys it to the conduit of the second nozzle (30).
  4. A spray device as claimed in claim 1, characterised in that hydrodynamic action means (36, 37) are associated with the second nozzle (30) to brake the rotation of said nozzle (30).
EP97201477A 1996-05-30 1997-05-16 Rotary Nozzle spray device Withdrawn EP0810035A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRE960043 1996-05-30
IT96RE000043A IT1287746B1 (en) 1996-05-30 1996-05-30 ROTATING NOZZLE SPRAYER

Publications (2)

Publication Number Publication Date
EP0810035A2 true EP0810035A2 (en) 1997-12-03
EP0810035A3 EP0810035A3 (en) 1998-09-02

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ID=11398897

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97201477A Withdrawn EP0810035A3 (en) 1996-05-30 1997-05-16 Rotary Nozzle spray device

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EP (1) EP0810035A3 (en)
IT (1) IT1287746B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003095098A1 (en) * 2002-05-07 2003-11-20 Gp Companies, Inc. Magnet-driven rotary nozzle
JP2015144747A (en) * 2014-02-03 2015-08-13 Toto株式会社 water discharge device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4014954C1 (en) * 1990-05-10 1991-05-23 Suttner Gmbh & Co Kg, 4800 Bielefeld, De Housing for high pressure cleaning water jet - has internal angled nozzle which provides rotary action under pressure of water flow
EP0563595A1 (en) * 1992-03-28 1993-10-06 Anton Jäger Rotor nozzle for a high-pressure cleaning device
DE4221587A1 (en) * 1992-07-01 1994-01-13 Anton Jaeger Rotor nozzle for high pressure cleaning appliance - has rotating distance element to permit rotor axis to be angled w.r.t. nozzle housing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4014954C1 (en) * 1990-05-10 1991-05-23 Suttner Gmbh & Co Kg, 4800 Bielefeld, De Housing for high pressure cleaning water jet - has internal angled nozzle which provides rotary action under pressure of water flow
EP0563595A1 (en) * 1992-03-28 1993-10-06 Anton Jäger Rotor nozzle for a high-pressure cleaning device
DE4221587A1 (en) * 1992-07-01 1994-01-13 Anton Jaeger Rotor nozzle for high pressure cleaning appliance - has rotating distance element to permit rotor axis to be angled w.r.t. nozzle housing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003095098A1 (en) * 2002-05-07 2003-11-20 Gp Companies, Inc. Magnet-driven rotary nozzle
US6766967B2 (en) 2002-05-07 2004-07-27 Gp Companies, Inc. Magnet-driven rotary nozzle
JP2015144747A (en) * 2014-02-03 2015-08-13 Toto株式会社 water discharge device

Also Published As

Publication number Publication date
ITRE960043A0 (en) 1996-05-30
IT1287746B1 (en) 1998-08-18
EP0810035A3 (en) 1998-09-02
ITRE960043A1 (en) 1997-11-30

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