EP3275508A1 - Buse pour eau, en particulier pour un pistolet à eau - Google Patents

Buse pour eau, en particulier pour un pistolet à eau Download PDF

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Publication number
EP3275508A1
EP3275508A1 EP17181792.7A EP17181792A EP3275508A1 EP 3275508 A1 EP3275508 A1 EP 3275508A1 EP 17181792 A EP17181792 A EP 17181792A EP 3275508 A1 EP3275508 A1 EP 3275508A1
Authority
EP
European Patent Office
Prior art keywords
jet nozzle
section
cross
flow
radial cross
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.)
Pending
Application number
EP17181792.7A
Other languages
German (de)
English (en)
Inventor
Wilfried Unrath
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.)
AWG Fittings GmbH
Original Assignee
AWG Fittings GmbH
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 AWG Fittings GmbH filed Critical AWG Fittings GmbH
Publication of EP3275508A1 publication Critical patent/EP3275508A1/fr
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C31/00—Delivery of fire-extinguishing material
    • A62C31/02—Nozzles specially adapted for fire-extinguishing
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C31/00—Delivery of fire-extinguishing material
    • A62C31/005—Delivery of fire-extinguishing material using nozzles
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C31/00—Delivery of fire-extinguishing material
    • A62C31/02—Nozzles specially adapted for fire-extinguishing
    • A62C31/03—Nozzles specially adapted for fire-extinguishing adjustable, e.g. from spray to jet or vice versa
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/07—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles
    • A62C3/08—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles in aircraft

Definitions

  • the present invention relates to a water jet nozzle, in particular for a water cannon, especially for use in fire extinguishing devices.
  • the present invention relates to both, have a simple bore, which forms an outlet opening, wherein the bore usually represents a taper at the end of the flow channel through the jet nozzle.
  • the water impact surface is not a point or a circle, but always a round or oval impact surface, because the water that is ejected through the jet nozzle flows apart in flight due to air resistance and vortex formation and only on the first meters behind the Outlet opening approximately along a cylinder volume propagates.
  • the present invention relates to such full-jet nozzles, which accordingly have a flow cross-section which has an at least substantially circular base surface.
  • hollow jet nozzles also referred to as ring jet nozzles, in which the flow cross section of the exit surface is substantially annular.
  • the hollow jet nozzle can be adjustable in order to focus the beam more or less. With hollow jet nozzles to produce a wider spray angle and adjustability of the beam.
  • the water is set in rotation prior to discharge in order to obtain a spraying angle of a maximum of about 20 °. Therefore, in the fire department very different between full jet nozzles and hollow jet nozzles.
  • the hollow jet nozzles have a shorter range than the full jet nozzles.
  • a disadvantage of the known water jet nozzles is that, in particular as the water outlet of a water cannon, the throwing distance is determined by the design of the nozzle and is set to a comparatively small water impact area, in particular at the bottom.
  • DE 10 2011 077 072 B3 proposes a jet nozzle with an outlet chamber and at least one outlet opening in an end face of the outlet chamber, wherein the outlet opening has a smaller cross-section than the outlet chamber and the end face is provided with at least three distributed over the circumference of the outlet opening arranged pocket-like recesses to the out of the outlet opening Rupture emerging full jet and thereby provide a fine atomization available, which should cool the fire better than known solid beams.
  • the arrangement of the pocket-like recesses around the jet is a fine spray generated due to its funnel-like distribution, however, can produce only a small cooling effect per unit area.
  • DE A0019987 M AZ discloses a liquid nozzle for foam jet pipes for fire fighting purposes for generating a hollow jet, wherein over the circumference of the flow cross-section uniformly distributed cross-sectional extensions are provided.
  • AT 193182 B discloses a nozzle for sprinklers or irrigation devices in which a main flow is hardly disturbed by the nozzle of the sprinkler and further by an opening of the nozzle wall, a side stream is generated, which flows against a baffle or baffle to irrigation in the vicinity of the sprinkler to effect.
  • the baffle or deflection surface is thereby formed in the opening of the nozzle wall, that the opening is slot-shaped, with an angled at an acute angle, obliquely to the axis of the nozzle orifice slot.
  • DE 10 2011 076 443 B4 discloses a check valve for a spray nozzle and a nozzle tube.
  • the present invention has for its object to provide a water jet nozzle, which is particularly suitable for a water cannon and which at the same time allows the same length cooling the cooling of extra-long objects, the production of a fire wall and the improved cooling of large areas.
  • a full jet nozzle according to the invention in particular for a water cannon, comprises an outlet opening which has an outer circumference which encloses an outlet area for forming a flow cross section.
  • the flow cross-section has an at least substantially circular base surface.
  • the base surface is in particular that at least substantially circular flow cross-section, which forms the largest part of the outlet opening.
  • At least one radial cross-sectional enlargement of the exit surface is now provided exclusively in an angular range of the outer circumference of the exit opening, the angle range being a maximum of 180 °.
  • At least one cross-sectional enlargement is provided on the outer circumference of the outlet opening or a plurality of cross-sectional enlargements are provided on the outer circumference of the outlet opening, which are then not distributed over the entire outer circumference of the outlet opening, but a range of at least 180 ° remains that is, at least half of the outer circumference in which no radial cross-sectional widening is provided. That is, in this area, the outer circumference follows only a circular shape.
  • the solid jet nozzle according to the invention has or surrounds a flow channel running along an axial direction, wherein the outlet opening is provided at the outlet end of the flow channel.
  • the at least one radial cross-sectional widening is realized by a slit running parallel to the axial direction of the flow channel with its longitudinal axis perpendicular to the base surface or perpendicular to the axial direction of the flow channel with its longitudinal axis Base formed opening recess.
  • the slot or the recess extends in particular exclusively along the axial direction of the flow channel, therefore, no inclination, for example, to produce a baffle, provided. Rather, the slot or the recess only allows a corresponding widening of the jet flowing through the flow channel, without deflecting it laterally in the axial direction.
  • a slot extends up to the radially outer circumference of the full jet nozzle, that is to say the slot is also open on the outside in the radial direction.
  • the radial cross-sectional widening does not extend to the outer surface of the nozzle, but the outlet opening and the recess is completely enclosed by an outer circumference, ie a wall or an edge.
  • the angular range of the outer circumference of the outlet opening, in which the at least one radial cross-sectional widening is provided extends over a maximum of 90 ° and in particular over a maximum of 60 ° or 45 ° or 30 °.
  • radial cross-sectional widening is here meant any local bulge of the exit surface starting from the base surface radially outward, regardless of the shape of the bulge. This can be rounded, substantially round or even pointed or have other curved or angled shapes.
  • the angular range of the outer circumference of the outlet opening with the at least one radial cross-sectional widening is provided in a proper use of the jet nozzle at least temporarily along a lower half of the outer circumference of the outlet opening, thus advantageously tearing open the full jet starting from the cylindrical shape only with respect to the Trajectory of the beam is done.
  • This can be a concentrated cooling of the surface below the beam, in particular starting from a few meters behind the water outlet from the nozzle to the impact surface of the beam on the ground or the fire object.
  • the jet nozzle has a multi-part nozzle body comprising an axial end portion in which the outlet opening is provided and which is rotatable relative to a subsequent axial portion to the angular range of the outer periphery with the at least one radial cross-sectional widening over a perpendicular to rotate on the exit surface standing axis of rotation, in particular by at least 180 °.
  • the adjoining axial section adjoins in particular directly to the end section.
  • the at least one radial cross-sectional widening forms a flow cross-section which amounts to a maximum of 25% of the base area of the flow cross-section of the full jet, in particular a maximum of 20% or even a maximum of 10%.
  • a maximum of 25% of the base area of the flow cross-section of the full jet in particular a maximum of 20% or even a maximum of 10%.
  • their total flow cross section amounts to a maximum of 10% of the base area.
  • the at least one radial cross-sectional widening is at least substantially triangular, that is to say it has a flow cross-section which can be described with a triangle.
  • One side of the triangle naturally follows the outer circumference of the base surface, thus essentially a circular path.
  • the at least one radial cross-sectional widening is at least substantially trapezoidal, that is to say it has a flow cross-section which can be described with a trapezoid.
  • the base of the trapezoid naturally follows the outer circumference of the Base area, therefore essentially a circular path.
  • base is here meant the lateral line surrounding the cross-section of the trapezoid, which is positioned radially inward in the jet nozzle, ie an imaginary line separating the circular base from the cross-sectional widening, ie the trapezoidal surface.
  • the outer side of the trapezoid may be straight or curved, in particular in the form of a circular path.
  • the jet nozzle has an axially extending flow channel, which opens directly into the outlet opening, and in the flow direction last axial portion of the flow channel with respect to an immediately preceding upstream upstream axial section of the flow channel is reduced in diameter. As a result, the flow velocity of the water or water jet emerging from the outlet opening can be increased.
  • the at least one radial cross-sectional enlargement is provided exclusively in the last axial section of the flow channel, that is to say the upstream adjoining axial section is free of such a radial cross-sectional widening and in particular is rotationally symmetrical or enclosed by a circular or substantially circular circumference.
  • a Strahlleitprofil may be provided in the upstream axial portion of the flow channel, which divides the flow cross section into individual circular sectors, wherein the Strahlleitprofil extending like a vane in the axial direction.
  • a jet nozzle according to the invention can be produced particularly easily by introducing a radial cross-sectional widening into the outlet opening only on a full-jet nozzle of the known type with a fully circular flow cross-section of the outlet opening, in particular by milling becomes.
  • This also existing jet nozzles can be easily retrofitted according to the invention.
  • rainfall of the full jet over the entire length of the throw can advantageously be achieved.
  • a very long and narrow impact surface is reached on the ground, starting a few meters behind the nozzle and ending with the maximum throw.
  • the following values can be provided or provided by the jet nozzle according to the invention: 5000 l water throughput per minute, 8 bar water pressure at the inlet of the jet nozzle, a throw along the jet nozzle in the range from 8 to 60 m.
  • the nozzle can be screwed onto a jet pipe via a thread and then brought into a position by corresponding rotation in which the at least one radial cross-sectional widening lies at least partially below the base area of the flow cross-section, in particular vertically below the lowest point of the base area.
  • the nozzle or the outlet opening is fixed in this position on the jet pipe.
  • Another embodiment provides optional rotatability to turn the irrigation effect on and off.
  • the switching off can take place in that the radial cross-sectional widening between an operative and an inoperative position is rotatable.
  • the flow area of the radial extension is free for the passage of water.
  • the inactive position the flow cross-section is covered, so that no or substantially no water can pass through and thus only the base surface of the outlet opening for the outlet of the water jet is available.
  • the effective position is provided in particular below, for example, vertically below the lowest point of the base.
  • the radial cross-sectional widening could be kept stationary and instead, it may optionally be coverable by a rotatable or slidable shutter to turn the sprinkler effect on and off.
  • the nozzle according to the invention for applying water a larger area on the ground or from above is used on fire, the nozzle must be aligned only at a suitable angle to the horizontal, for example from 25 to 30 °, and horizontally pivoted, whereas with the conventional jet nozzles both a horizontal and vertical pivoting was necessary to vary the latter by the throwing distance.
  • a complete round surface can be covered in the form of a full circle.
  • the result is a water-loaded radius around the exit point of the water, for example a vehicle with a mounted water cannon. This can be life-saving in vegetation fires.
  • FIG. 1 a full jet nozzle designed according to the invention is shown, which can be mounted, for example, on an extinguishing arm or at the end of a jet pipe of a fire fighting vehicle or airfield fire fighting vehicle.
  • the nozzle has an outlet opening 1 for the water jet.
  • the outlet opening 1 is provided in the region of the one axial end of the nozzle, opposite to a second axial end, via which water enters the nozzle.
  • the outlet opening 1 on an outer periphery 2 which encloses the outlet surface for forming the flow cross-section 3 for the water.
  • the flow cross-section 3 has an at least substantially circular base area 3.1 and a radial cross-sectional widening 3.2.
  • the total flow cross-section in the outlet opening 1 for the water composed of the base 3.1 and the radial cross-sectional widening 3.2, also called keyhole-like.
  • the invention is not limited to only radial cross-sectional widening 3.2. Rather, several radial cross-sectional extensions could be provided, wherein in the FIG. 2 It is important, however, that all provided radial cross-sectional widenings 3.2 and possibly 3.2 ', 3.2 "only in a predetermined angular range 2.1 of the outer circumference 2 at the base 3.1 are connected, wherein the angle range 2.1 is a maximum of 180 °.
  • the angular range 2.1 extends as in the FIG. 2 is shown, only along an underside or lower half of the outlet opening. 1
  • the jet nozzle has a flow channel 5 extending in the axial direction 10, which opens into the outlet opening 1.
  • a last axial section 5.1 of the flow channel 5 in the direction of flow of the water through the jet nozzle is reduced in diameter relative to an immediately adjoining upstream axial section 5.2 of the flow channel.
  • the longitudinal axis 11 of the cross-sectional widening 3.2, here in the form of a recess 13 extends parallel to the axial direction 10.
  • the nozzle at the water outlet end has a web 6 which projects at least slightly opposite the end face 7, in which the outlet opening 1 is provided, in the axial direction and the outlet opening 1 surrounds.
  • a beam guide 9 may be provided to reduce turbulence in the flow.
  • the beam guide 9 divides the flow channel 5 at least into individual circular sectors.
  • the beam guide section 9 further divides the flow channel 5 into a core bore, which is enclosed by the circular sectors.
  • the cross-sectional widening 3.2 is formed by a recess 13 whose longitudinal axis 11 extends parallel to the axial direction 10 of the flow channel 5.
  • the recess 13 does not extend to the radially outer surface of the nozzle or the nozzle body, here the axial end section 8.1.
  • the cross-sectional widening 3.2 could also be guided to the radially outer surface of the nozzle or the end section 8.1, then in the form of a slot 12.
  • the slot 12 tapers radially from the inside to the outside, so that it approximately the Cross section of a triangle or at least approximately has the cross section of a trapezoid.
  • FIG. 6 It is shown how a cross-sectional widening 3.2 in the form of a recess 13 with a trapezoidal cross section could look like.
  • the flow cross-section of the cross-sectional widening 3.2 tapers in particular radially from the inside to the outside.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Nozzles (AREA)
EP17181792.7A 2016-07-25 2017-07-18 Buse pour eau, en particulier pour un pistolet à eau Pending EP3275508A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016213551.1A DE102016213551A1 (de) 2016-07-25 2016-07-25 Düse für Wasser, insbesondere für einen Wasserwerfer

Publications (1)

Publication Number Publication Date
EP3275508A1 true EP3275508A1 (fr) 2018-01-31

Family

ID=59381100

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17181792.7A Pending EP3275508A1 (fr) 2016-07-25 2017-07-18 Buse pour eau, en particulier pour un pistolet à eau

Country Status (3)

Country Link
US (1) US10617899B2 (fr)
EP (1) EP3275508A1 (fr)
DE (1) DE102016213551A1 (fr)

Families Citing this family (5)

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Publication number Priority date Publication date Assignee Title
USD920471S1 (en) * 2019-07-19 2021-05-25 Graco Minnesota Inc. Component mixing chamber
USD904562S1 (en) * 2019-07-19 2020-12-08 Graco Minnesota Inc. Component mixing chamber
USD904565S1 (en) * 2019-07-19 2020-12-08 Graco Minnesota Inc. Component mixing chamber
USD922521S1 (en) * 2019-07-19 2021-06-15 Graco Minnesota Inc. Component mixing chamber
USD933159S1 (en) 2019-07-19 2021-10-12 Graco Minnesota Inc. Component mixing chamber

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DE102011077072B3 (de) 2011-06-07 2012-10-04 Lechler Gmbh Vollstrahldüse
DE102011076443B4 (de) 2011-05-25 2013-01-17 Lechler Gmbh Rückschlagventil für Sprühdüse und Düsenrohr

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AT193182B (de) 1955-11-30 1957-11-25 Bauer Roehren Pumpen Düse für Regner od. dgl. Bewässerungsgeräte
US3149784A (en) * 1962-06-15 1964-09-22 Donald G Griswold Long-range rotary water sprinkler
US20020151250A1 (en) * 2001-04-11 2002-10-17 Robert Ulrich Adaptive nozzle system for high-energy abrasive stream cutting
JP2004105312A (ja) * 2002-09-13 2004-04-08 Nohmi Bosai Ltd 水噴霧ヘッド
DE102011076443B4 (de) 2011-05-25 2013-01-17 Lechler Gmbh Rückschlagventil für Sprühdüse und Düsenrohr
DE102011077072B3 (de) 2011-06-07 2012-10-04 Lechler Gmbh Vollstrahldüse

Also Published As

Publication number Publication date
US10617899B2 (en) 2020-04-14
US20180021611A1 (en) 2018-01-25
DE102016213551A1 (de) 2018-01-25

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