EP0591241B1 - Selbsteinstellender strahlverteiler fuer schlagregner - Google Patents

Selbsteinstellender strahlverteiler fuer schlagregner Download PDF

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Publication number
EP0591241B1
EP0591241B1 EP92910648A EP92910648A EP0591241B1 EP 0591241 B1 EP0591241 B1 EP 0591241B1 EP 92910648 A EP92910648 A EP 92910648A EP 92910648 A EP92910648 A EP 92910648A EP 0591241 B1 EP0591241 B1 EP 0591241B1
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EP
European Patent Office
Prior art keywords
jet
arm
active surface
blade
impact sprinkler
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
EP92910648A
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English (en)
French (fr)
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EP0591241A1 (de
Inventor
Arno Drechsel
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Individual
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Individual
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Filing date
Publication date
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Publication of EP0591241A1 publication Critical patent/EP0591241A1/de
Application granted granted Critical
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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
    • B05B3/06—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 by jet reaction
    • B05B3/063—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 by jet reaction using a member, e.g. a deflector, for creating the tangential component of the jet

Definitions

  • the present invention relates to a self-adjusting jet breaker device for impact sprinklers.
  • the breaker device according to the invention can be mounted on impact sprinklers of the type described, for example, in the Italian patent application No 85608 A/90 in the name of this same Applicant
  • Such sprinklers generally comprise a spout which is connected to a supply line by means of a braked rotary coupling, with a terminal nozzle for generating a jet and an oscillating arm provided with a baffle which periodically interferes with the jet.
  • the baffle In said sprinklers, the baffle, during its interference with the jet, captures part of the kinetic energy of said jet, imparting to the arm an instantaneous rotary torque which tends to cause both the oscillation of the arm and the rotation of the spout in steps of preset breadth.
  • the baffle furthermore has the function of periodically breaking the fluid column so as to distribute the water proximate to the sprinkler as well.
  • DE-C-975525 dicloses an impact sprinkler having an adjustable baffler connected to the rotation apparatus of the sprinkler. This sprinkler allows for a greater range of adjustment at the cost, however, of a greater complexity in construction and operation.
  • the aim of the present invention is to provide a jet breaker device which allows to significantly increase the beat frequency for an equal jet pressure.
  • An object of the present invention is to provide a self - adjusting jet breaker device which is able to improve the breakup of the jet especially at low pressures, leaving its maximum range substantially unchanged.
  • Another object of the present invention is to provide a jet breaker device which can interact with the jet in one or both of the rotation directions of the sprinkler.
  • Not least object of the present invention is to provide a jet breaker device which has an extremely simple and economical structure.
  • a jet breaker device of this type can be applied to existing impact sprinklers so as to significantly increase the beat frequency and intensify the breakup of the jet in one or both of the directions in which the sprinkler rotates about its own vertical axis.
  • a jet breaker device according to the invention is mounted on an impact sprinkler designated by the letter I.
  • the sprinkler comprises a spout T which has a braked coupling R at one end.
  • Coupling R can rotate about a vertical axis, and is adapted to connect the spout to a pressurized water supply line L.
  • Coupling R is also rigidly associated with a frame, which is not shown in the drawings.
  • a nozzle U for generating a jet G is arranged at the free end of the spout T, while an oscillating arm B is pivoted proximate to its central portion.
  • a baffle D is arranged at the outer end of the arm and is used to periodically and impulsively capture part of the energy of the jet in order to make the arm oscillate about its fulcrum and thereby rotate the spout about its own vertical axis.
  • the jet breaker device 200 comprises one or more active surfaces which can be anchored to the arm B, for example, in an intermediate position between its oscillation axis and the baffle, so as to interact at least once with the jet between two successive oscillations of the arm.
  • the device 200 might also be mounted at a greater distance from the baffle, achieving the same final result.
  • the device 200 comprises a pedestal 201 which is anchored to the arm B, by means of a fixing plate 202, on one side with respect to its centerline M.
  • a bracket support 203 is fixed at the top of the pedestal 201 and is provided with a grooved guide 204.
  • Guide 204 slidingly accommodates a blade 206 provided with a sharp edge 207 and with an elongated fixing hole 208.
  • the active surface of the device, which is intended to interfere with the jet is constituted by the lower face of the blade 206.
  • Blade 206 is fixed in position along the guide 204 of the support 203 by means of a bolt 209 which passes through the elongated hole 208. It is thus possible to arrange the device 200 on one side or on both sides with respect to the longitudinal axis of the arm B, so that the blade interferes with the jet during the rotation of the sprinkler in one direction or in both directions.
  • the bracket support 204 is inclined with respect to the axis of the pedestal 201, so that the blade 206 forms an angle ⁇ with the longitudinal axis M of the arm B.
  • the height of the pedestal 201 and the shape of the bracket support 204 are also such that the blade is at a minimum distance H from the longitudinal axis of the arm.
  • the jet G initially interacts with the baffle D, causing the arm B to rotate downward without encountering the jet breaker device.
  • the blade 206 of the jet breaker 200 will begin to skim the jet G, being approximately parallel to the axis thereof, as indicated by the position 206' shown in broken lines in Figure 4. In this position, a substantially nil perpendicular force acts on the blade, while the positive sharpening angle of the leading edge of the blade facilitates its penetration in the jet.
  • the blade 206 interacts with the jet G, exerting an accelerating torque on the arm, i.e. a torque which tends to facilitate its upward movement.
  • This acceleration in ascent combined with braking during descent, determines an overall increase in the beat frequency of the arm, and thus in the rotation rate of the sprinkler.
  • the jet can resume its shape, achieving its maximum range.
  • the blade transit speed is such as to cause a sudden and effective breakup of the jet both during its downward movement and during its upward movement.
  • blade inclination angles ⁇ comprised between 15° and 30°, and preferably equal to approximately 25°, give the best results in varying the frequency and breakup of the jet.
  • the distance H can vary according to the size of the baffle D and according to the distance from the arm oscillation axis.
  • the second embodiment of the jet breaker differs from the first one in that it has a pair of active surfaces having different inclinations, instead of a single surface.
  • the active surfaces are constituted by the lower faces of two deflector wings 210, 211 which extend radially and on opposite sides of a ratchet 212.
  • Ratchet 212 is mounted on the adjustable-length pedestal 201 so as to be able to rotate vertically.
  • the wings 210 and 211 have a convex shape, similar to a wing contour, with a median axis which forms respective angles ⁇ 1 and ⁇ 2 with respect to the longitudinal axis of the arm.
  • the ratchet 212 can be rotated manually and retained in two diametrically opposite fixed positions, so as to expose only one of the wings 210 and 211 to the jet, as clearly shown in Figures 5 and 6.
  • Figures 7 and 8 schematically illustrate the fact that operatively the angle ⁇ 1 is such that the median axis of the wing 210 is approximately parallel to the direction of the jet during transit through said jet. Therefore, the wing 210 is used mainly to break up the jet without transmitting appreciable forces to the arm during its oscillation.
  • the angle ⁇ 2 of the wing 211 is such that the jet is always inclined with respect to the wing 211 during its interference. This will cause, on the lower surface of the wing 211, a thrust with a perpendicular component F directed upward, which applies a clockwise torque to the arm, with an effect similar to the one described for the model of Figure 3.
  • the jet breaker device according to the invention achieves the intended aim and objects and in particular it is noted that it produces an optimum distribution and breakup of the jet together with an increase in the beat frequency in an automatic manner, i.e. adapting to both high and low jet supply pressures.
  • the device according to the invention is also simple and economical to manufacture and easy to install on existing sprinklers with no modification of their structure.

Landscapes

  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Nozzles (AREA)
  • Catching Or Destruction (AREA)

Claims (8)

  1. Impulsregner mit einer selbsteinstellenden Strahlunterbrechungseinrichtung (200), enthaltend ein Wasserspritzrohr (T) mit einer Düse (U) zur Erzeugung eines Strahles (G) sowie einen mit einem Prallblech (D) ausgestatteten Schwingarm (B), wobei die Unterbrechungseinrichtung auf dem Arm in einem ausgewählten Abstand zwischen dem Prallblech (D) und der Schwingachse des Armes angeordnet ist und mindestens eine erste aktive Fläche (206,210,211) aufweist, die geeignet ist, mit dem Strahl zwischen zwei aufeinanderfolgenden Schwingungen des Arms in Wechselwirkung zu treten, dadurch gekennzeichnet, daß die aktive Fläche einen solchen Neigungswinkel (τ) zur Längsachse (M) des Arms (B) hat, daß sie zu Beginn ihres von oben nach unten gerichteten Durchgangs durch den Strahl im wesentlichen tangential zu demselben verläuft.
  2. Impulsregner nach Anspruch 1, dadurch gekennzeichnet, daß die aktive Fläche während des Durchgangs durch den Strahl in bezug auf die Strahlachse zunchmend geneigt ist, um eine aufwärts gerichtete Schubkraft zu erhalten.
  3. Impulsregner nach Anspruch 1, dadurch gekennzeichnet, daß die aktive Fläche durch die Unterseite eines im wasentlichen ebenen Flügels (206) gebildet wird, welcher an der Oberseite eines Ständers (201) befestigt ist, der seinerseits mittels einer Befestigungsplatte auf dem Arm verankert ist.
  4. Impulsregner nach Anspruch 1, dadurch gekennzeichnet, daß der durchschnittliche Neigungswinkel (τ) des Flügels in bezug auf die Längsachse des Arms zwischen 15° und 30° liegt.
  5. Impulsregner nach Anspruch 4, dadurch gekennzeichnet, daß der Flügel (206) in einer in einem Haltearm (203) angebrachten Führungsrille (204) bewegt werden kann und ein Langloch (208) zur Verankerung in der Führung des Haltearms in seitlichen Endlagen aufweist.
  6. Impulsregner nach Anspruch 4, dadurch gekennzeichnet, daß er eine zweite aktive Fläche (211) aufweist, die an der Oberseite des Haltearms in einer Stellung montiert ist, die in bezug auf die erste aktive Fläche (210) diametral entgegengesetzt und mit einem anderen Neigungswinkel (Φ₂) angeordnet ist.
  7. Impulsregner nach Anspruch 6, dadurch gekennzeichnet, daß die erste aktive Fläche (210) und die zweite aktive Fläche (211) radial von einem Klinkenrad (212) abstehen, das drehbar an der Oberseite des Ständers angebracht ist und in zwei einander diametral gegenüberliegenden, festen Winkelstellungen angeorndet werden kann.
  8. Impulsregner nach Anspruch 4, dadurch gekennzeichnet, daß der Winkel (τ) etwa 25° beträgt.
EP92910648A 1991-06-27 1992-05-21 Selbsteinstellender strahlverteiler fuer schlagregner Expired - Lifetime EP0591241B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITVI910105A IT1247226B (it) 1991-06-27 1991-06-27 Dispositivo rompigetto autoregolante per irrigatori ad impatto
ITVI910105 1991-12-06
PCT/EP1992/001140 WO1993000169A1 (en) 1991-06-27 1992-05-21 Self-adjusting jet breaker for impact sprinklers

Publications (2)

Publication Number Publication Date
EP0591241A1 EP0591241A1 (de) 1994-04-13
EP0591241B1 true EP0591241B1 (de) 1995-04-26

Family

ID=11424691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92910648A Expired - Lifetime EP0591241B1 (de) 1991-06-27 1992-05-21 Selbsteinstellender strahlverteiler fuer schlagregner

Country Status (6)

Country Link
EP (1) EP0591241B1 (de)
AT (1) ATE121645T1 (de)
AU (1) AU1767492A (de)
DE (1) DE69202248T2 (de)
IT (1) IT1247226B (de)
WO (1) WO1993000169A1 (de)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB330330A (en) * 1929-03-22 1930-06-12 Fingal Cecil Orr Sprinkling device
US2606789A (en) * 1950-02-17 1952-08-12 Buckner Mfg Company Sprinkler
CH313915A (de) * 1952-05-15 1956-05-31 Ludwig Lanninger Karl Regner mit selbsttätig drehbarer Düse
DE975525C (de) * 1952-12-21 1961-12-21 Karl Ludwig Lanninger Getriebeloser Kreisflaechen- und Sektorflaechen-Einstrahlregner
GB1184072A (en) * 1967-07-04 1970-03-11 Wright Rain Ltd Rotary Water Sprinkler
US3580507A (en) * 1969-06-09 1971-05-25 Rain Bird Sprinkler Mfg Drive mechanism for large volume rotary sprinklers
AU558026B2 (en) * 1983-05-02 1987-01-15 Rain Bird Sprinkler Manufacturing Corporation Impact drive sprinkler

Also Published As

Publication number Publication date
WO1993000169A1 (en) 1993-01-07
EP0591241A1 (de) 1994-04-13
ITVI910105A1 (it) 1992-12-27
ATE121645T1 (de) 1995-05-15
DE69202248T2 (de) 1995-10-12
DE69202248D1 (de) 1995-06-01
ITVI910105A0 (it) 1991-06-27
AU1767492A (en) 1993-01-25
IT1247226B (it) 1994-12-12

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