EP0429736B1 - Spritzlanze eines Flüssigkeitsgemisches - Google Patents

Spritzlanze eines Flüssigkeitsgemisches Download PDF

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Publication number
EP0429736B1
EP0429736B1 EP19890460042 EP89460042A EP0429736B1 EP 0429736 B1 EP0429736 B1 EP 0429736B1 EP 19890460042 EP19890460042 EP 19890460042 EP 89460042 A EP89460042 A EP 89460042A EP 0429736 B1 EP0429736 B1 EP 0429736B1
Authority
EP
European Patent Office
Prior art keywords
chamber
lance
wall
fluid
holes
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
EP19890460042
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English (en)
French (fr)
Other versions
EP0429736A1 (de
Inventor
André Le Grouyellec
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Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE1989614995 priority Critical patent/DE68914995T2/de
Priority to AT8989460042T priority patent/ATE104871T1/de
Publication of EP0429736A1 publication Critical patent/EP0429736A1/de
Application granted granted Critical
Publication of EP0429736B1 publication Critical patent/EP0429736B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • A62C31/12—Nozzles specially adapted for fire-extinguishing for delivering foam or atomised foam
    • 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
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge

Definitions

  • the present invention relates to a lance for spraying a mixture of fluids and, more particularly a mixture of water with one or more other liquids or gases.
  • Water lances are also used in law enforcement operations and, in this case, attempts are made to add tear-gas or incapacitating products to the water.
  • Fluid mixing lances can also be used in the chemical industry and for cleaning, decontamination, etc.
  • the liquid mixing lance according to the invention as described in rev. 1, is intended to meet two conditions: on the one hand, to project an effective jet over a long distance and, on the other hand, to instantly produce a homogeneous mixture of liquids.
  • a lance for spraying a mixture of fluids comprising a main liquid inlet tube followed by a first chamber with divergent conical internal and external walls, the external wall extending the tube. inlet and the inner wall having its apex opposite the axis of the tubing, said outer wall being pierced with holes through which at least one additional fluid is sprayed into said first chamber, which communicates through other practically longitudinal holes drilled in the periphery of the base of said internal wall with a second chamber bounded by a converging conical side wall which opens into a relatively long outlet pipe.
  • the peripheral gap between the conical internal and external walls of the first chamber is closed by a cylindrical ferrule.
  • the conical side wall of the second chamber comprises two trunks of cone of angles at the decreasing top from the entry towards the exit.
  • the outlet pipe of the lance is surrounded by an air passage sleeve whose diameter, beyond the outlet of said outlet pipe, rapidly reduces to a value slightly greater than that of the diameter of the outlet pipe.
  • the lance of FIG. 1 comprises an inlet part 1, an intermediate part 2 and an outlet part 3.
  • the inlet part 1 comprises a part with a cylindrical internal surface 4 followed by a part with a conical internal surface 5, the cone of the part 5 being divergent, considering the direction of flow indicated by the arrows F.
  • the cylindrical part 4 is designed to be connected to a pressurized water pipe, not shown.
  • the conical part 5 is pierced with a number of holes 6 which are intended to be connected to a source of fluid to be mixed with water, which will be described in more detail below.
  • the intermediate piece 2 is conical internally and externally, the tips of the cones being turned towards that of the cone of the part 5.
  • the upstream surface 7 of the part 2 has an apex angle substantially equal to that of the part 5 as its downstream surface 8.
  • the base 9 of the conical part 2 has the shape of a circular crown pierced with longitudinal holes 10. In the example described, the edge of the crown 9 is connected to the base of the part 5 of the part 1 by a cylindrical part 11 which serves to limit transversely a first conical chamber divergent A in which the water entering through part 4 mixes with the fluid leaving holes 6.
  • the outlet part 3 comprises a cylindrical part 12 which surrounds the crown 9, a converging conical part 13 and a cylindrical part 14.
  • the chamber B, between the diverging conical surface 8 and the converging conical part 13 creates a turbulence which ensures mixing homogeneous water and additional fluid which leaves, at high speed, through part 14.
  • the sum of the cross sections of the holes 10 is substantially equal to the sum of the cross section of the hole 4 and that of the holes 6. Thus, no pressure drop is created during the operation of mixing the fluids.
  • the cross section of the part 14 is less than this sum in order to impart a high speed to the fluid leaving the lance.
  • a cylindrical ferrule 15 is provided which is externally threaded at its two ends, for screwing, on the one hand, the internal tapped surface of the part 12 of the part 3 and, d on the other hand, the internal threaded surface of the bowl 16 of an annular part 17 serving for the supply of fluid intended to pass through the holes 6.
  • the central part of the bottom of the bowl 16 is pierced with a hole which allows to thread the sleeve 17 on the external surface of the cylindrical part 4 of the inlet part 1, which has a shoulder 18 against which the sleeve 17 bears to ensure the sealing of an annular chamber C limited d on the one hand by the bottom of the bowl 16, by the ferrule 15 and the external surface of the conical part 5.
  • a hole 19 is also provided in the sleeve 17 to make the chamber C communicate with the supply line for the additional fluid .
  • the holes 6 open into the chamber C.
  • the cylindrical part 12 of the outlet part 3 also has an annular shoulder 20 which comes into contact with the downstream surface of the crown 9 when the part 3 is screwed onto the ferrule 15.
  • annular shoulder 20 which comes into contact with the downstream surface of the crown 9 when the part 3 is screwed onto the ferrule 15.
  • tests were carried out with a lance in which the water entered chamber A at a pressure of 14 bars and the additional fluid, for example a tear gas, was applied at inlet 19 to a pressure from 18 to 20 bars.
  • the internal diameter of part 4 was 38 mm
  • that of part 12 was 100 mm and that of part 14 was 23 mm
  • the total length was 407 mm
  • the half-angle at the top of cones 2 and 5 was 28 °
  • the number of holes 6 was 18 and their diameter 4 mm
  • the number of holes 10 was 14 and their diameter 10 mm.
  • the operation of the lance is as follows.
  • the water entering through the tube 4 undergoes a slowing down and a change of direction to meet the cone 2. Therefore, its flow becomes turbulent and the additional fluid leaving through a large number of holes 6 distributed uniformly begins to mix with the water.
  • the passage of the premix through the holes 10 accentuates the homogeneity of the mixture which ends in chamber B where the mixture picks up speed to flow into the barrel 14 in turbulent mode.
  • FIG. 2 In the variant of lance shown schematically in FIG. 2, we used the same reference numbers for designate the same parts as in Fig. 1.
  • Another annular chamber C ′ has been added into which a second additional fluid can be admitted, in liquid or gaseous form.
  • This chamber C ′ is connected to an inlet tube 19 ′, similar to 19, and holes 6 ′ for entry into the chamber A play the same role as the holes 6.
  • This lance makes it possible to add for example l air to the liquid mixture which is obtained with the lance of FIG. 1.
  • the barrel 14 is surrounded by a sleeve 21, of larger diameter, which extends beyond the barrel by an auxiliary barrel 22 whose diameter is slightly greater than that of the barrel 14.
  • a conical part 23 establishes the connection between the sleeve 21 and the auxiliary barrel 22.
  • the sleeve 21 is open at the rear so that air is sucked into it, which will form a kind of gaseous sheath which prevents the jet of liquid leaving the barrel 14 to touch the walls of the auxiliary barrel 22. This makes it possible to provide a shorter barrel 14 and therefore to reduce the friction of the liquid jet, which improves the concentration of the final jet.
  • the projection lance does not include any moving part, which makes it very simple and very reliable.
  • the different parts of the lance were made of stainless steel, but all or part of the lance could be made of suitable plastic.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Nozzles (AREA)

Claims (4)

  1. Spritzlanze für ein Flüssigkeitsgemisch, bestehend aus einem Eintrittsstutzen (4) für die Hauptflüssigkeit, an welchen sich eine erste Kammer (A) und eine zweite Kammer (B) anschliessen, mit einer Innenwand (2) und einer Außenwand (5), wobei diese Außenwand mit Bohrungen (6) versehen ist, durch welche zumindest ein zusätzliches Fluid in die erste Kammer (A) eingeleitet wird, dadurch gekennzeichnet, daß die Innenwand (2) und die Außenwand (5) der ersten Kammer (A) konisch divergierend ausgebildet sind, daß die Außenwand (5) die Verlängerung des Etrittsstutzens (4) bildet und die Spitze der Innenwand (2) der Achse des Eintrittsstutzens (4) gegenüberliegt und daß die Kammer (A) über weitere, praktisch in Längsrichtung verlaufende und am Umfang der Basis (9) der Innenwand (2) liegende Bohrungen (10) mit einer zweiten Kammer (B) verbunden ist, welche von einer konischen Seitenwand (13) begrenzt ist, die in einen relativ langen Austrittsstutzen (14) einmündet.
  2. Lanze nach Anspruch 1, dadurch gekennzeichnet, daß der in Umfangsrichtung liegende Zwischenraum zwischen der konischen Innenwand (2) und der konischen Außenwand (5) der ersten Kammer (A) von einem zylinderförmigen Ring (15) abgeschlossen ist.
  3. Lanze nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die konische Seitenwand (13) der zweiten Kammer (B) zwei kegelstumpfförmige Abschnitte aufweist, wobei die Winkel an der Spitze vom Eintritt in Richtung des Austrittsstutzens (14) in ihrer Größe abnehmen.
  4. Lanze nach einem der Ansprüche 1 - 3, dadurch gekennzeichnet, daß der Austrittsstutzen (14) der Lanze von einer Muffe (21) für den Luftdurchtritt umgeben ist, deren Durchmesser jenseits des Austritts (14) schnell auf einen Wert abnimmt, der geringfügig großer ist als derjenige des Durchmessers des Austrittsstutzens (14).
EP19890460042 1988-09-16 1989-11-28 Spritzlanze eines Flüssigkeitsgemisches Expired - Lifetime EP0429736B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE1989614995 DE68914995T2 (de) 1989-11-28 1989-11-28 Spritzlanze eines Flüssigkeitsgemisches.
AT8989460042T ATE104871T1 (de) 1989-11-28 1989-11-28 Spritzlanze eines fluessigkeitsgemisches.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8812310A FR2636545B1 (fr) 1988-09-16 1988-09-16 Lance de projection d'un melange de fluides

Publications (2)

Publication Number Publication Date
EP0429736A1 EP0429736A1 (de) 1991-06-05
EP0429736B1 true EP0429736B1 (de) 1994-04-27

Family

ID=9370214

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890460042 Expired - Lifetime EP0429736B1 (de) 1988-09-16 1989-11-28 Spritzlanze eines Flüssigkeitsgemisches

Country Status (2)

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EP (1) EP0429736B1 (de)
FR (1) FR2636545B1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2636545B1 (fr) * 1988-09-16 1990-12-07 Legrouyelec Andre Lance de projection d'un melange de fluides
JP2707490B2 (ja) * 1995-06-09 1998-01-28 株式会社ウチナミ 空中洗浄方法及び装置
US5779158A (en) * 1996-04-16 1998-07-14 National Foam, Inc. Nozzle for use with fire-fighting foams
RU2107554C1 (ru) * 1996-07-08 1998-03-27 Научно-исследовательский институт низких температур при Московском государственном авиационном институте (техническом университете) Способ создания газокапельной струи, установка для его осуществления и сопло для создания газокапельной струи
US6102308A (en) * 1998-04-02 2000-08-15 Task Force Tips, Inc. Self-educing nozzle
CN102350029B (zh) * 2011-07-28 2013-08-14 广东联塑科技实业有限公司 一种大射程消防水枪
CN114262043B (zh) * 2021-12-29 2024-02-09 威海丰泰新材料科技股份有限公司 一种高效气液共混污水处理方法及装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2046254A1 (de) * 1969-09-18 1971-04-01 Atomic Energy Of Canada Ltd
US4420047A (en) * 1981-12-28 1983-12-13 Lockheed Corporation Stowable fire suppression system for aircraft cabins and the like
FR2636545B1 (fr) * 1988-09-16 1990-12-07 Legrouyelec Andre Lance de projection d'un melange de fluides

Also Published As

Publication number Publication date
EP0429736A1 (de) 1991-06-05
FR2636545A1 (fr) 1990-03-23
FR2636545B1 (fr) 1990-12-07

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