EP0674919A1 - Vorrichtung zum Einspritzen und Dosieren eines Produktes in eine Wasserleitung einer Feuerlöschvorrichtung - Google Patents

Vorrichtung zum Einspritzen und Dosieren eines Produktes in eine Wasserleitung einer Feuerlöschvorrichtung Download PDF

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Publication number
EP0674919A1
EP0674919A1 EP95420081A EP95420081A EP0674919A1 EP 0674919 A1 EP0674919 A1 EP 0674919A1 EP 95420081 A EP95420081 A EP 95420081A EP 95420081 A EP95420081 A EP 95420081A EP 0674919 A1 EP0674919 A1 EP 0674919A1
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EP
European Patent Office
Prior art keywords
product
pipe
injector
additive
water pipe
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.)
Granted
Application number
EP95420081A
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English (en)
French (fr)
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EP0674919B1 (de
Inventor
Christian Chmara
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C T D PULVERISATION
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C T D PULVERISATION
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Application filed by C T D PULVERISATION filed Critical C T D PULVERISATION
Publication of EP0674919A1 publication Critical patent/EP0674919A1/de
Application granted granted Critical
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Anticipated expiration legal-status Critical
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    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C5/00—Making of fire-extinguishing materials immediately before use
    • A62C5/02—Making of fire-extinguishing materials immediately before use of foam

Definitions

  • the present invention relates to a device for injecting and dosing a liquid additive product into a water pipe for fire fighting, this device aiming to mix the additive product with water circulating in a pipe, respecting a predefined proportion.
  • Additives can be emulsifying, retarding, wetting, ... In all cases, they are dosed with water, with a percentage defined for each of them to guarantee their effectiveness.
  • French patent application No. 2675697 describes a device for adding and mixing in constant proportion of an additive in a main product, mounted on a fire extinguisher.
  • This mechanical mixing device reduces the useful power of the pump, it uses the principle of "venturi” (with the inaccuracies which are linked to it), and above all it has the drawback of passing the adduct with water in the fire pump.
  • European patent application No. 0343320 discloses an installation comprising an automatic mixing device, electronically regulated with specific functions. If this device allows automatic and suitable regulation of the addition and mixing of an additive product with water, it still has the drawback of passing additive product with water through the fire pump.
  • French utility certificate No. 2598922 describes a mobile station for the manufacture of liquid retardant solutions.
  • the device in question consists of a fire pump, two electromagnetic flowmeters and a positive displacement pump for the additive (retardant) product, which injects this product into the water pipe.
  • the drawbacks of this device lie in the use of a hydrostatic transmission, linking the retarding pump to the fire pump, and in the complexity of the regulation.
  • the device uses two separate regulation chains, one of which allows the flow rate of delaying, and the other for regulating the pressure at the outlet of the positive displacement pump of additive product.
  • the latter device has the major drawback of being linked to the fire pump (by the hydrostatic transmission).
  • the present invention aims to solve the problems mentioned above, by proposing an autonomous device, positioned close to the reserve of additive product but independent of it and of the fire pump, therefore endowed with great flexibility of use, and using a simple, reliable and reasonable electronic control, while ensuring precise dosing and a homogeneous mixture of the adduct with water, without generating pressure losses.
  • the proposed device can be inserted freely downstream of the fire pump (which is therefore not crossed by the additive), therefore between the vehicle pumping the water and the fire hose, this which allows it to be positioned where the supply of additive product is easiest.
  • the device therefore has the major advantage of being able to fit into existing operational schemes, and thus adapt to the equipment in place, which allows to obtain a complete efficient system with a reasonable investment.
  • the presence of the additive recycling tank also contributes to the autonomy of the device which is the subject of the invention, by allowing this device to operate "in a closed circuit", by avoiding a return to the reserve of additive product, which return involves a risk of overflow or mixing between incompatible products.
  • the recycling tank is divided into two compartments, communicating with each other in a limited way, by at least one internal anti-turbulence partition, the return pipe coming from the motorized regulating valve. ending in one of the compartments, while the other compartment has at its lower part the connection of the pipe coming from the reserve of additive product, and has at its upper part the departure of the suction pipe supplying the positive displacement pump.
  • the use of a motorized regulating valve, combined with an electronic regulating block, according to a simple operating diagram, makes it possible to precisely regulate the flow rate of added product injected as a function of the proportion programmed, expressable in particular in the form of a percentage setpoint, this independently of the viscosity of the adduct.
  • the injector arranged tangentially to the water stream and provided with a kind of diffuser, the mixing of product with water is carried out without pressure drop for the water pipe, and very homogeneously .
  • the structure of the injector imposes a minimum pressure to introduce the adduct into the water pipe, which avoids losses of this product and allows operate the positive displacement pump in a closed circuit (recycling of all the additive product flow).
  • the single figure illustrates, in a schematic form, the principle of production and operation of a device for injecting and dosing a liquid addition product, such as a foam concentrate, into a water pipe 1.
  • a liquid addition product such as a foam concentrate
  • the water passing through the pipe 1 is set in motion and under pressure in this pipe 1 by a pump 2 (fire pump), located upstream of the entire injection and metering device, generally designated by the reference 3 Downstream of this device 3, the mixture of water and additive, such as foam concentrate, is directed to a user device 4, such as a fire hose.
  • the injection and metering device 3 comprises a positive displacement pump 5, driven by a motor 6 which can be a heat engine.
  • the addition product is stored in a tank 7.
  • a suction pipe 8 comprising a non-return valve 9 connects the bottom of the tank 7 to the lower part of a recycling tank 10.
  • the output of this positive displacement pump 5 feeds a motorized regulating valve 12, one outlet path of which is connected by a return line 13 to the recycling tank 10.
  • the other outlet channel of the regulating valve 12 constitutes the starting point of a pipe 14, on which an axial turbine flow meter 15 is inserted.
  • Line 14 leads to an injector 16 disposed inside the water line 1.
  • Another turbine flow meter 17 is placed in the water pipe 1 upstream of the injector 16, for measuring the flow of water sent by the pump 2.
  • the injector 16 and the flow meter 17 are fixed to a tube -support which can be easily inserted in the water pipe 1 thanks to suitable fittings.
  • the injector 16 itself consists of a fixed tubular pipe 18 arranged parallel to the axis of the water pipe 1, of a movable piston 19 of conical shape capable of closing the outlet before the pipe 18, and a return spring 20 placed at the rear of the injector 16 and acting on the piston rod 19 in the direction of closing the pipe 18.
  • the injection of the additive product takes place when the pressure of this additive product, brought through line 14, is sufficient to detach the piston 19 from its seat.
  • the conical shape of this piston 19 allows, in the open position, a better diffusion of the additive product in water, therefore a good mixture of water with this additive product.
  • the flow meter 15 mounted on the pipe 14 traversed by the additive product, and the other flow meter 17 placed in the water pipe 1, are electrically connected to an electronic control unit 21, by respective electrical connections 22 and 23 which convey signals representative of the additive product flow d and the water flow D, respectively.
  • the electronic unit 21 has an input 24 for the introduction of a percentage setpoint C programmed by the operator, and an output 25 for controlling the electric motor 26 of the regulating valve 12.
  • the recycling tank 10 is divided into two separate compartments 27 and 28, communicating with each other in a limited manner, by one or more internal anti-turbulence partitions 29.
  • One of the compartments 27, in which the return line 13 ends, is reserved for recycling the adduct.
  • the other compartment 28 comprises at its lower part the intake of the addition product, arriving via line 8 from the tank 7, and comprises at its upper part the departure from line 11 directing the addition product towards the volumetric pump suction port 5.
  • the fire pump 2 and the positive displacement pump 5 operate simultaneously, each providing a certain flow, and the motorized regulating valve 12 calibrates the return flow of the additive product, brought back by the return line 13 to the recycling tank 10.
  • the electronic means contained in the regulation unit 21, calculate at all times the percentage expressing the ratio between the flow rate of additive product d given by the flow meter 15 , and the water flow D given by the flow meter 17, and compare this calculated percentage with the percentage setpoint C programmed by the operator. Depending on the result of the comparison, these electronic means drive the motorized valve 12, by sending its motor 26 more or less long control pulses, negative or positive, depending on the difference between the actual percentage determined by measurement and calculation. , and the programmed percentage C.
  • the motorized valve 12 is actuated so as to further close the outlet channel opening into the return line 13, and to correlatively increase the flow of additive product sent via line 14 to the injector 16. Conversely, if the actual percentage is greater than the programmed percentage, the motorized valve 12 is actuated so as to further open the outlet channel opening into the return line 13, and to decrease correlatively, the flow of additive product sent via line 14 to the injector 17.
  • the motorized valve 12 can close or completely open the passage of the addition product to the return pipe 13.
  • the regulation system operating in an electric closed loop, thus makes it possible, whatever the flow or pressure of water in the pipe 1, to inject an additive product with a precise concentration into the latter, without the operator having to to intervene.
  • All the regulation parameters, or those relating to flowmeters 15 and 17, are programmable from a keyboard (not shown).
  • the functions The main ones of the regulation unit 21 are, for their part, programmed during the manufacture of the device, from a standard regulation card.
  • the regulation unit 21 can be equipped so as to display the programmed percentage C (defined above), as well as the actual percentage calculated from the flow information d and D delivered respectively by the two flow meters 15 and 17.
  • the value of the water flow D passing through the pipe 1 can also be directly displayed.
  • the box 21 can also be equipped to perform other functions such as: totalization of the flow rates, determination of the volume of additive product remaining in the tank 7 or indication of any other information, according to user demand.
  • an alternator mounted on the motor 6 of the pump 5 makes it possible to supply a battery, constituting the energy source of the flow meters 15 and 17, of the electronic control unit 21 and of all ancillary electrical equipment.
  • the reserve of additive product can be integrated into the device, or constituted by a tanker truck, or even be produced in the form of small capacity cans, without however departing from the spirit of the invention. .
EP95420081A 1994-03-29 1995-03-28 Vorrichtung zum Einspritzen und Dosieren eines Produktes in eine Wasserleitung einer Feuerlöschvorrichtung Expired - Lifetime EP0674919B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9404073 1994-03-29
FR9404073A FR2718038B1 (fr) 1994-03-29 1994-03-29 Dispositif d'injection et de dosage d'un produit dans une conduite d'eau pour la lutte contre l'incendie.

Publications (2)

Publication Number Publication Date
EP0674919A1 true EP0674919A1 (de) 1995-10-04
EP0674919B1 EP0674919B1 (de) 1999-01-27

Family

ID=9461818

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95420081A Expired - Lifetime EP0674919B1 (de) 1994-03-29 1995-03-28 Vorrichtung zum Einspritzen und Dosieren eines Produktes in eine Wasserleitung einer Feuerlöschvorrichtung

Country Status (5)

Country Link
EP (1) EP0674919B1 (de)
AT (1) ATE176168T1 (de)
DE (1) DE69507524T2 (de)
ES (1) ES2128686T3 (de)
FR (1) FR2718038B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1147788A2 (de) 2000-03-21 2001-10-24 Vigh, Andreas, Dipl.-Ing. (FH) Pumpendruckseitig angeordnetes Zumischgerät mit und ohne Druckluftverwendung
WO2005018748A1 (en) * 2003-08-05 2005-03-03 Blazey, Glynnis, Rae Fire extinguisher system
CN106730545A (zh) * 2016-12-26 2017-05-31 威特龙消防安全集团股份公司 细水雾灭火系统添加剂计量注入系统
CN112245843A (zh) * 2020-10-20 2021-01-22 蒋小芳 一种高层楼宇消防用水智能预警设备
CN112512307A (zh) * 2018-07-25 2021-03-16 应用生命科学和系统有限责任公司 循环系统和方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2784733A1 (es) * 2019-03-28 2020-09-30 Martino Joaquin Gracia Autobomba de extinción para incendios de alta intensidad y elevadas temperaturas

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE630263C (de) * 1934-12-08 1936-05-25 Boernecke & Borchart Vorrichtung zum Regeln der Foerdermenge von Injektoren, bei denen das Treibmittel und das Foerdergut unter gleichem statischem Druck stehen
DE638286C (de) * 1936-11-12 Gerhard Kolvenbach Gasmischvorrichtung fuer zwei oder mehrere Gase
DE2145515A1 (de) * 1970-09-14 1972-03-16 Gelco-Project Lindgren & Co. Handelsbolag, Stockholm Verfahren und Vorrichtung zur laufenden Erzeugung eines Gels
US4324294A (en) * 1979-02-07 1982-04-13 John McLoughlin Chemical injection control system for fire fighting
FR2598922A1 (fr) * 1986-05-21 1987-11-27 Charbonnages Ste Chimique Station mobile pour la fabrication de solutions de retardant liquide destinees a combattre les incendies
EP0343320A2 (de) * 1988-05-26 1989-11-29 Total Walther Feuerschutz GmbH Einrichtung für Feuerlösch-Anlagen mit einem automatischen, elektronisch gesteuerten Zumischer
US5009244A (en) * 1989-08-17 1991-04-23 Grindley, Inc. Fire fighting foam mixing system
FR2675697A1 (fr) * 1991-04-26 1992-10-30 Total Feuerschutz Gmbh Dispositif, d'addition et de melangeage, d'un engin d'extinction de feu.
US5174383A (en) * 1988-09-08 1992-12-29 Hypro Corporation Apparatus and method for controlling the introduction of chemical foamant into water stream in fire-fighting equipment

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE638286C (de) * 1936-11-12 Gerhard Kolvenbach Gasmischvorrichtung fuer zwei oder mehrere Gase
DE630263C (de) * 1934-12-08 1936-05-25 Boernecke & Borchart Vorrichtung zum Regeln der Foerdermenge von Injektoren, bei denen das Treibmittel und das Foerdergut unter gleichem statischem Druck stehen
DE2145515A1 (de) * 1970-09-14 1972-03-16 Gelco-Project Lindgren & Co. Handelsbolag, Stockholm Verfahren und Vorrichtung zur laufenden Erzeugung eines Gels
US4324294A (en) * 1979-02-07 1982-04-13 John McLoughlin Chemical injection control system for fire fighting
FR2598922A1 (fr) * 1986-05-21 1987-11-27 Charbonnages Ste Chimique Station mobile pour la fabrication de solutions de retardant liquide destinees a combattre les incendies
EP0343320A2 (de) * 1988-05-26 1989-11-29 Total Walther Feuerschutz GmbH Einrichtung für Feuerlösch-Anlagen mit einem automatischen, elektronisch gesteuerten Zumischer
US5174383A (en) * 1988-09-08 1992-12-29 Hypro Corporation Apparatus and method for controlling the introduction of chemical foamant into water stream in fire-fighting equipment
US5009244A (en) * 1989-08-17 1991-04-23 Grindley, Inc. Fire fighting foam mixing system
FR2675697A1 (fr) * 1991-04-26 1992-10-30 Total Feuerschutz Gmbh Dispositif, d'addition et de melangeage, d'un engin d'extinction de feu.

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1147788A2 (de) 2000-03-21 2001-10-24 Vigh, Andreas, Dipl.-Ing. (FH) Pumpendruckseitig angeordnetes Zumischgerät mit und ohne Druckluftverwendung
WO2005018748A1 (en) * 2003-08-05 2005-03-03 Blazey, Glynnis, Rae Fire extinguisher system
CN106730545A (zh) * 2016-12-26 2017-05-31 威特龙消防安全集团股份公司 细水雾灭火系统添加剂计量注入系统
CN112512307A (zh) * 2018-07-25 2021-03-16 应用生命科学和系统有限责任公司 循环系统和方法
CN112245843A (zh) * 2020-10-20 2021-01-22 蒋小芳 一种高层楼宇消防用水智能预警设备

Also Published As

Publication number Publication date
DE69507524D1 (de) 1999-03-11
EP0674919B1 (de) 1999-01-27
ES2128686T3 (es) 1999-05-16
ATE176168T1 (de) 1999-02-15
FR2718038B1 (fr) 1996-05-15
DE69507524T2 (de) 1999-07-15
FR2718038A1 (fr) 1995-10-06

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