EP1147788B1 - Dispositif mélangeur avec ou sans utilisation d'air comprimé disposé côté pression de pompe - Google Patents

Dispositif mélangeur avec ou sans utilisation d'air comprimé disposé côté pression de pompe Download PDF

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Publication number
EP1147788B1
EP1147788B1 EP01106202A EP01106202A EP1147788B1 EP 1147788 B1 EP1147788 B1 EP 1147788B1 EP 01106202 A EP01106202 A EP 01106202A EP 01106202 A EP01106202 A EP 01106202A EP 1147788 B1 EP1147788 B1 EP 1147788B1
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EP
European Patent Office
Prior art keywords
foam
venturi nozzle
connection
extinguisher
fact
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
EP01106202A
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German (de)
English (en)
Other versions
EP1147788A2 (fr
EP1147788A3 (fr
Inventor
Andreas Dipl.-Ing. Vigh (Fh)
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.)
Vigh Andreas Dipl-Ing (fh)
Original Assignee
Vigh Andreas Dipl-Ing (fh)
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Filing date
Publication date
Application filed by Vigh Andreas Dipl-Ing (fh) filed Critical Vigh Andreas Dipl-Ing (fh)
Publication of EP1147788A2 publication Critical patent/EP1147788A2/fr
Publication of EP1147788A3 publication Critical patent/EP1147788A3/fr
Application granted granted Critical
Publication of EP1147788B1 publication Critical patent/EP1147788B1/fr
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

Definitions

  • the invention relates to an extinguishing device for fire fighting, with an extinguishing agent guide and a Schaumzumischvorraum with a foam line in which a foam pump is arranged, wherein in the extinguishing agent guide a Venturi nozzle is used.
  • the invention relates to an extinguishing device for fire fighting, with an extinguishing agent guide and a Schaumzumischvorraum with a foam line, which is connected to a central foam supply, wherein in the extinguishing agent guide a Venturi nozzle is used.
  • This type of foam mixer is represented by the so-called "Z" mixer (a jet pump arranged on the pressure side).
  • the standard according to DIN 14 384 Zumischer has significant pressure losses, after which a pressure loss of 38% is allowed in point 8.1.6 of this standard sheet. Also, the counter-pressure behavior of the mentioned Zumischers is not satisfactory. This should be to ensure its function 1t. Standard values do not exceed 2 bar. This means that even at low height differences and the use of several hose lengths, the extinguishing success is significantly impaired. The unit is also unsuitable for compressed-air admixture.
  • the specified proportioning rates are 3% or 6%, so that stepless or lower settings of the proportioning rates are not possible.
  • the drives lying in the extinguishing water are equipped with protective sieve, they are not readily suitable for the use of service water and are susceptible to interference by sieve contamination.
  • the object of the invention is therefore to propose a quenching device with a Druckzumischer, are minimized in the pressure loss, thermal stress, installation dimensions and weight compared to conventional devices or the foam pump drive is not installed in the fire water drive in the main fire water stream.
  • the admixer should be suitable both for central and decentralized foam supply, as well as for electronic and mechanical versions or for compressed air assisted stepless admixture.
  • the Venturi nozzle has a quadratic relationship between the flow rate and the differential pressure.
  • the differential pressure which arises as a result of the speed increase in the narrowest cross-section of the nozzle (a pressure reduction compared to the primary pressure - no negative pressure) is proportional to the square of the amount of liquid flowing through. For example, if the flow rate increases from a specific value to 5 times the differential pressure increases 25 times.
  • This law is used in the suction and pressure side arranged Venturizumischung to a flow rate and pressure independent, itself to achieve automatically constant admixture by ensuring that the foam pressure at the narrowest point of the nozzle (foam inlet) is equal to the primary pressure (extinguishing water inlet pressure into the nozzle).
  • the differential pressure is measured by measuring the differential pressure on the flow rate.
  • Embodiments of the invention are the subject of the dependent claims.
  • the extinguishing water is guided into the narrowest point of the Venturi nozzle 1 via a branch line 2 branched off from the main water stream 3.
  • This secondary flow 2 which is returned to the nozzle and thereby causes no extinguishing quantity loss, also subject to the aforementioned law, since its pressure is equal to the main flow pressure. It means that the off-stream quantities will change proportionally to the main flow-rate changes.
  • the nozzle housing 8 is divided into three separate, mutually sealed and independent parts for the compressed air introduction and compressed air via the line 10 in the front part of the nozzle 1 is performed. It is advantageous that can be dispensed with additional expensive flow meters for water and foam, as the amount of extinguishing extinction of the speed of the foam pump drive 4 via a rotary encoder not only mechanically, but depending on the version can also be detected electronically. Thus, at the same time the compressor speed for the compressed air quantity generation can be regulated.
  • the structure of the device must not be changed even if, instead of decentralized Schaumzumischung a central foam supply via the line 11 is preferred (Fig. 3).
  • the secondary flow 2 of the nozzle 1 either be measured via encoder 12 or inductively contactless or mechanically via a counter.
  • a differential pressure gauge can be used for measuring the flow rate and a differential pressure gauge can be used.
  • the advantage here is that the meters are not installed in the main stream and thereby cause neither pressure loss nor flow disturbances. They can be switched on and off as desired (foam operation / water operation). When using electronic flow meters, these can be much smaller and thus made more economical, since the secondary flow has a smaller cross-section than the main flow.
  • Another advantage of the solution according to the invention is that the admixing device is no longer dependent on the extinguishing vehicle energy supply, since this can also be designed purely mechanical.
  • the device not only permanently installed in the vehicle or stationary use, but can also be designed portable and coupled in hose lines and used in portable pumping syringes.
  • a retrofit of existing vehicles, regardless of their size, is also readily feasible.

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Nozzles (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)

Claims (9)

  1. Dispositif d'extinction destiné à combattre l'incendie, avec une conduite de produit d'extinction ainsi qu'un dispositif de mélange de la mousse comportant un tuyau à mousse (7) dans lequel est placée une pompe à produit moussant, un tube de Venturi (1) étant placé dans le conduite de produit d'extinction, caractérisé en ce qu'une ligne de courant de dérivation (2) est prévue, qui est raccordée d'une part, à un branchement de dérivation de la conduite de produit d'extinction, devant le tube de Venturi, dans le sens de l'afflux du courant, et d'autre part, à un raccordement de reflux placé approximativement dans la zone de la partie la plus étroite du tube de Venturi, que le tuyau à mousse (7) est raccordé à un raccord d'alimentation de la mousse situé approximativement dans la zone de la partie la plus étroite du tube de Venturi dans le sens aval du courant depuis le raccordement de reflux, que, à l'intérieur de la ligne de courant de dérivation, se trouve au moins une roue dentée d'engrenage, une turbine (4) ou un autre élément d'entraînement similaire entraîné par le courant de dérivation, dont l'entraînement est relié à la pompe à produit moussant (5) et qu'un organe d'obturation (6) est prévu pour fermer et ouvrir la ligne de courant de dérivation.
  2. Dispositif d'extinction destiné à combattre l'incendie, avec une conduite de produit d'extinction ainsi qu'un dispositif de mélange de la mousse comportant un tuyau à mousse (11), qui est relié à une alimentation centrale en mousse, un tube de Venturi (1) étant placé dans le conduite de produit d'extinction, caractérisé en ce qu'une ligne de courant de dérivation (2) est prévue, qui est raccordée d'une part, à un branchement de dérivation de la conduite de produit d'extinction, devant le tube de Venturi, dans le sens de l'afflux du courant, et d'autre part, à un raccordement de reflux placé approximativement dans la zone de la partie la plus étroite du tube de Venturi, qu'un débitmètre est placé dans la ligne de courant de dérivation, pour réguler l'alimentation centrale en mousse, que le tuyau à mousse (11) est raccordé à un raccordement d'alimentation en mousse, approximativement dans la zone de la partie la plus étroite du tube de Venturi, dans le sens aval du courant depuis le raccordement de reflux, et en ce qu'un organe d'obturation (6) est prévu pour fermer et ouvrir la ligne de courant de dérivation.
  3. Dispositif d'extinction selon l'une des revendications 1 ou 2, caractérisé en ce que, dans la zone du tube de Venturi (1), en particulier dans la zone de l'élargissement du tube dans le sens aval, au moins un raccordement (10) a été prévu pour amener l'air comprimé.
  4. Dispositif d'extinction selon la revendication 1, caractérisé en ce que l'entraînement de la pompe à produit moussant (4) est conçu comme un débitmètre pour l'affichage mécanique et/ou électronique et comme unité de commande.
  5. Dispositif d'extinction selon l'une des revendications 1 à 4, caractérisé en ce que le raccord de courant de reflux de la ligne de courant de dérivation (2), le raccord d'alimentation en mousse ainsi que l'alimentation en air comprimé (10) sont guidés dans des compartiments séparés les uns des autres, respectivement reliés à l'intérieur du tube de Venturi par des ouvertures de passage.
  6. Dispositif d'extinction selon la revendication 5, caractérisé en ce que les trois raccordements, à savoir le raccordement de reflux de courant (2), le raccordement d'alimentation en mousse (11) et le raccordement d'alimentation en air comprimé (10), respectivement les compartiments correspondants, de préférence de forme circulaire soient placés l'un après l'autre dans le sens de passage du flux, approximativement dans une zone du tube Venturi (1) qui s'étend approximativement de la partie la plus étroite du tube de Venturi, à l'élargissement qui s'y rattache.
  7. Dispositif d'extinction selon l'une des revendications 1 à 6, caractérisé en ce que le mélangeur est conçu comme une unité portative, ce qui permet de l'installer, par exemple, à l'intérieur de conduites de tuyaux flexibles, dans des motopompes rotatives conformes à la DIN 14410.
  8. Dispositif d'extinction selon l'une des revendications 2, 3, 5 à 7, caractérisé en ce que, avec une alimentation en mousse externe (11), une dispositif mécanique séparé, par ex. une roue dentée ou un autre élément similaire, ou un débitmètre inductif, sans contact ou un manomètre à pression différentielle, est installé dans la conduite de courant de dérivation (2) pour mesurer le débit du tube de Venturi (1).
  9. Dispositif d'extinction selon l'une des revendications 3 à 8, caractérisé en ce que, pour un mélange de mousse sous air comprimé, le régime du compresseur est réglé pour produire la quantité d'air comprimé.
EP01106202A 2000-03-21 2001-03-14 Dispositif mélangeur avec ou sans utilisation d'air comprimé disposé côté pression de pompe Expired - Lifetime EP1147788B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10013974A DE10013974A1 (de) 2000-03-21 2000-03-21 Pumpendruckseitig angeordnetes Zumischgerät mit und ohne Druckluftverwendung
DE10013974 2000-03-21

Publications (3)

Publication Number Publication Date
EP1147788A2 EP1147788A2 (fr) 2001-10-24
EP1147788A3 EP1147788A3 (fr) 2002-06-12
EP1147788B1 true EP1147788B1 (fr) 2007-09-26

Family

ID=7635767

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01106202A Expired - Lifetime EP1147788B1 (fr) 2000-03-21 2001-03-14 Dispositif mélangeur avec ou sans utilisation d'air comprimé disposé côté pression de pompe

Country Status (3)

Country Link
EP (1) EP1147788B1 (fr)
AT (1) ATE374061T1 (fr)
DE (2) DE10013974A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE435688T1 (de) * 2003-04-30 2009-07-15 Rassek Bernd Dietrich Verfahren zur zumischung (dosierung) von flüssigen löschmittelzusätzen in feuerlöschanlagen mit wässrigen löschmitteln
DE202004006977U1 (de) 2004-04-30 2004-08-26 Vigh, Andreas, Dipl.-Ing. (Fh) Löscheinrichtung zur Brandbekämpfung
US9057484B2 (en) 2010-08-11 2015-06-16 Huguenot Laboratories Bypass feeder device
CN105435403B (zh) * 2015-12-31 2018-12-21 广东永强奥林宝国际消防汽车有限公司 一种消防车用流量管路
CN111298334A (zh) * 2020-04-15 2020-06-19 安徽世纪凯旋消防科技有限公司 一种泡沫比例混合装置的水动能系统
CN112933469B (zh) * 2021-04-22 2022-03-01 应急管理部消防产品合格评定中心 一种比例混合装置
CN115463362A (zh) * 2022-08-05 2022-12-13 绿友机械集团股份有限公司 一种双层射流消防泡沫发泡喷射装置

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2543941A (en) 1946-03-06 1951-03-06 Hale Fire Pump Co Proportioning device
DE1759749A1 (de) * 1968-06-04 1971-07-01 Reuter Werner Feuerloesch-Schnellverfahren mittels Schnelldampferzeugern
US3642072A (en) 1969-10-08 1972-02-15 Factory Mutual Res Corp Fixed tire extinguishing system with additive injection apparatus
DE3131522A1 (de) 1981-08-08 1983-04-21 Jürgen Dipl.-Ing. 4800 Bielefeld Kornfeld Einrichtung zum dosierten einbringen von fluessigen zusaetzen zu einer unter druck stroemenden fluessigkeit
US4436487A (en) 1982-06-29 1984-03-13 Enterra Corporation Foam liquid concentrate supply system
GB2130910B (en) * 1982-09-25 1987-03-18 Gilmat Engineering Limited Additive supply apparatus for use in a fluid supply line
US4633895A (en) 1985-12-30 1987-01-06 Hale Fire Pump Company Fluid proportioning apparatus
US4915300A (en) * 1987-08-20 1990-04-10 John Ryan High pressure mixing and spray nozzle apparatus and method
US5085278A (en) * 1990-10-15 1992-02-04 T. D. F. Partnership Foam proportioning inductor apparatus
EP0638333B1 (fr) 1993-08-13 1997-07-16 VOGT AG, Feuerwehrgeräte- und Fahrzeugbau Système mélangeur de mousse avec pompe de mousse et commande de secours
AT401693B (de) 1993-10-08 1996-11-25 Rosenbauer Int Ag Zumischeinrichtung zum zumischen von zusatzmitteln zu einer flüssigkeit
FR2718038B1 (fr) 1994-03-29 1996-05-15 Ctd Pulverisation Dispositif d'injection et de dosage d'un produit dans une conduite d'eau pour la lutte contre l'incendie.

Also Published As

Publication number Publication date
ATE374061T1 (de) 2007-10-15
EP1147788A2 (fr) 2001-10-24
DE10013974A1 (de) 2001-10-04
EP1147788A3 (fr) 2002-06-12
DE50113049D1 (de) 2007-11-08

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